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6650 lines
162 KiB
6650 lines
162 KiB
/*
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* clamav-milter.c
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* .../clamav-milter/clamav-milter.c
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*
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* Copyright (C) 2003-2007 Nigel Horne <njh@bandsman.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* Install into /usr/local/sbin/clamav-milter
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* See http://www.elandsys.com/resources/sendmail/libmilter/overview.html
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*
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* For installation instructions see the file INSTALL that came with this file
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*
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* NOTE: first character of strings to logg():
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* ! Error
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* ^ Warning
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* * Verbose
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* # Info, but not logged in foreground
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* Default Info
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*/
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static char const rcsid[] = "$Id: clamav-milter.c,v 1.312 2007/02/12 22:24:21 njh Exp $";
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#define CM_VERSION "devel-20080920"
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include "cfgparser.h"
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#include "target.h"
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#include "str.h"
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#include "../libclamav/others.h"
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#include "output.h"
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#include "clamav.h"
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#include "table.h"
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#include "network.h"
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#ifndef CL_DEBUG
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#define NDEBUG
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#endif
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#include <stdio.h>
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#include <sysexits.h>
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#if HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#if HAVE_MEMORY_H
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#include <memory.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#include <sys/wait.h>
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#include <assert.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#include <sys/un.h>
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#include <stdarg.h>
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#include <errno.h>
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#if HAVE_LIBMILTER_MFAPI_H
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#include <libmilter/mfapi.h>
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#endif
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#include <pthread.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <grp.h>
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#if HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#if HAVE_RESOLV_H
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#include <arpa/nameser.h> /* for HEADER */
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#include <resolv.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <ctype.h>
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#if HAVE_MMAP
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#if HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#else /* HAVE_SYS_MMAN_H */
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#undef HAVE_MMAP
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#endif
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#endif
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#ifdef C_LINUX
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#include <sys/sendfile.h> /* FIXME: use sendfile on BSD not Linux */
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#include <libintl.h>
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#include <locale.h>
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#define gettext_noop(s) s
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#define _(s) gettext(s)
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#define N_(s) gettext_noop(s)
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#else
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#define _(s) s
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#define N_(s) s
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#endif
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#ifdef USE_SYSLOG
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#include <syslog.h>
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#endif
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#ifdef WITH_TCPWRAP
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#if HAVE_TCPD_H
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#include <tcpd.h>
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#endif
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int allow_severity = LOG_DEBUG;
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int deny_severity = LOG_NOTICE;
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#endif
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#ifdef CL_DEBUG
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static char console[] = "/dev/console";
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#endif
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#if defined(CL_DEBUG) && defined(C_LINUX)
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#include <sys/resource.h>
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#endif
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#define _GNU_SOURCE
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#include <getopt.h>
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#ifndef SENDMAIL_BIN
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#define SENDMAIL_BIN "/usr/lib/sendmail"
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#endif
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#ifndef HAVE_IN_PORT_T
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typedef unsigned short in_port_t;
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#endif
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#ifndef HAVE_IN_ADDR_T
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typedef unsigned int in_addr_t;
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#endif
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#ifndef INET6_ADDRSTRLEN
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#ifdef AF_INET6
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#define INET6_ADDRSTRLEN 40
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#else
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#define INET6_ADDRSTRLEN 16
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#endif
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#endif
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#ifndef EX_CONFIG /* HP-UX */
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#define EX_CONFIG 78
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#endif
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#define VERSION_LENGTH 128
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#define DEFAULT_TIMEOUT 120
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#define NTRIES 30 /* How long to wait for the local clamd to start */
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/*#define SESSION*/
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/* Keep one command connexion open to clamd, otherwise a new
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* command connexion is created for each new email
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*
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* FIXME: When SESSIONS are open, freshclam can hang when
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* notfying clamd of an update. This is most likely to be a
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* problem with the implementation of SESSIONS on clamd.
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* The problem seems worst on BSD.
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*
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* Note that clamd is buggy and can hang or even crash if you
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* send SESSION command so be aware
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*/
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/*
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* TODO: optional: xmessage on console when virus stopped (SNMP would be real nice!)
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* Having said that, with LogSysLog you can (on Linux) configure the system
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* to get messages on the system console, see syslog.conf(5), also you
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* can use wall(1) in the VirusEvent entry in clamd.conf
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* TODO: Decide action (bounce, discard, reject etc.) based on the virus
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* found. Those with faked addresses, such as SCO.A want discarding,
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* others could be bounced properly.
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* TODO: Encrypt mails sent to clamd to stop sniffers. Sending by UNIX domain
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* sockets is better
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* TODO: Load balancing, allow local machine to talk via UNIX domain socket.
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* TODO: allow each To: line in the whitelist file to specify a quarantine email
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* address
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* TODO: optionally use zlib to compress data sent to remote hosts
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* TODO: Finish IPv6 support (serverIPs array and SPF are IPv4 only)
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* TODO: Check domainkeys as well as SPF for phish false positives
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*/
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struct header_node_t {
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char *header;
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struct header_node_t *next;
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};
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struct header_list_struct {
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struct header_node_t *first;
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struct header_node_t *last;
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};
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typedef struct header_list_struct *header_list_t;
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/*
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* Local addresses are those not scanned if --local is not set
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* 127.0.0.0 is not in this table since that's goverend by --outgoing
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* Andy Fiddaman <clam@fiddaman.net> added 169.254.0.0/16
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* (Microsoft default DHCP)
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* TODO: compare this with RFC1918/RFC3330
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*/
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#define PACKADDR(a, b, c, d) (((uint32_t)(a) << 24) | ((b) << 16) | ((c) << 8) | (d))
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#define MAKEMASK(bits) ((uint32_t)(0xffffffff << (32 - bits)))
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static struct cidr_net { /* don't make this const because of -I flag */
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uint32_t base;
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uint32_t mask;
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} localNets[] = {
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/*{ PACKADDR(127, 0, 0, 0), MAKEMASK(24) }, /* 127.0.0.0/24 */
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{ PACKADDR(192, 168, 0, 0), MAKEMASK(16) }, /* 192.168.0.0/16 */
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{ PACKADDR( 10, 0, 0, 0), MAKEMASK(8) }, /* 10.0.0.0/8 */
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{ PACKADDR(172, 16, 0, 0), MAKEMASK(12) }, /* 172.16.0.0/12 */
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{ PACKADDR(169, 254, 0, 0), MAKEMASK(16) }, /* 169.254.0.0/16 */
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{ 0, 0 }, /* space to put eight more via -I addr */
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 }
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};
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#define IFLAG_MAX 8
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#ifdef AF_INET6
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typedef struct cidr_net6 {
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struct in6_addr base;
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int preflen;
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} cidr_net6;
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static cidr_net6 localNets6[IFLAG_MAX];
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static int localNets6_cnt;
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#endif
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/*
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* Each libmilter thread has one of these
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*/
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struct privdata {
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char *from; /* Who sent the message */
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char *subject; /* Original subject */
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char *sender; /* Secretary - often used in mailing lists */
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char **to; /* Who is the message going to */
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char ip[INET6_ADDRSTRLEN]; /* IP address of the other end */
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int numTo; /* Number of people the message is going to */
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#ifndef SESSION
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int cmdSocket; /*
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* Socket to send/get commands e.g. PORT for
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* dataSocket
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*/
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#endif
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int dataSocket; /* Socket to send data to clamd */
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char *filename; /* Where to store the message in quarantine */
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u_char *body; /* body of the message if Sflag is set */
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size_t bodyLen; /* number of bytes in body */
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header_list_t headers; /* Message headers */
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long numBytes; /* Number of bytes sent so far */
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char *received; /* keep track of received from */
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const char *rejectCode; /* 550 or 554? */
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unsigned int discard:1; /*
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* looks like the remote end is playing ping
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* pong with us
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*/
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#ifdef HAVE_RESOLV_H
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unsigned int spf_ok:1;
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#endif
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int statusCount; /* number of X-Virus-Status headers */
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int serverNumber; /* Index into serverIPs */
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struct cl_node *root; /* database of viruses used to scan this one */
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};
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#ifdef SESSION
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static int createSession(unsigned int s);
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#else
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static int pingServer(int serverNumber);
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static void *try_server(void *var);
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static int active_servers(int *active);
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struct try_server_struct {
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int sock;
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int rc;
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struct sockaddr_in *server;
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int server_index;
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};
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#endif
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static int findServer(void);
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static sfsistat clamfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr);
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#ifdef CL_DEBUG
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static sfsistat clamfi_helo(SMFICTX *ctx, char *helostring);
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#endif
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static sfsistat clamfi_envfrom(SMFICTX *ctx, char **argv);
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static sfsistat clamfi_envrcpt(SMFICTX *ctx, char **argv);
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static sfsistat clamfi_header(SMFICTX *ctx, char *headerf, char *headerv);
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static sfsistat clamfi_eoh(SMFICTX *ctx);
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static sfsistat clamfi_body(SMFICTX *ctx, u_char *bodyp, size_t len);
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static sfsistat clamfi_eom(SMFICTX *ctx);
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static sfsistat clamfi_abort(SMFICTX *ctx);
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static sfsistat clamfi_close(SMFICTX *ctx);
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static void clamfi_cleanup(SMFICTX *ctx);
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static void clamfi_free(struct privdata *privdata, int keep);
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static int clamfi_send(struct privdata *privdata, size_t len, const char *format, ...);
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static long clamd_recv(int sock, char *buf, size_t len);
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static off_t updateSigFile(void);
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static header_list_t header_list_new(void);
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static void header_list_free(header_list_t list);
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static void header_list_add(header_list_t list, const char *headerf, const char *headerv);
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static void header_list_print(header_list_t list, FILE *fp);
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static int connect2clamd(struct privdata *privdata);
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static int sendToFrom(struct privdata *privdata);
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static int checkClamd(int log_result);
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static int sendtemplate(SMFICTX *ctx, const char *filename, FILE *sendmail, const char *virusname);
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static int qfile(struct privdata *privdata, const char *sendmailId, const char *virusname);
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static int move(const char *oldfile, const char *newfile);
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static void setsubject(SMFICTX *ctx, const char *virusname);
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/*static int clamfi_gethostbyname(const char *hostname, struct hostent *hp, char *buf, size_t len);*/
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static int add_local_ip(char *address);
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static int isLocalAddr(in_addr_t addr);
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static int isLocal(const char *addr);
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static void clamdIsDown(void);
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static void *watchdog(void *a);
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static int check_and_reload_database(void);
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static void timeoutBlacklist(char *ip_address, int time_of_blacklist, void *v);
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static void quit(void);
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static void broadcast(const char *mess);
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static int loadDatabase(void);
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static int increment_connexions(void);
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static void decrement_connexions(void);
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static void dump_blacklist(char *key, int value, void *v);
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#ifdef SESSION
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static pthread_mutex_t version_mutex = PTHREAD_MUTEX_INITIALIZER;
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static char **clamav_versions; /* max_children elements in the array */
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#define clamav_version (clamav_versions[0])
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#else
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static char clamav_version[VERSION_LENGTH + 1];
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#endif
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static int fflag = 0; /* force a scan, whatever */
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static int oflag = 0; /* scan messages from our machine? */
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static int lflag = 0; /* scan messages from our site? */
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static int Iflag = 0; /* Added an IP addr to localNets? */
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static const char *progname; /* our name - usually clamav-milter */
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/* Variables for --external */
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static int external = 0; /* scan messages ourself or use clamd? */
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static pthread_mutex_t root_mutex = PTHREAD_MUTEX_INITIALIZER;
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static struct cl_node *root = NULL;
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static struct cl_limits limits;
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static struct cl_stat dbstat;
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static int options = CL_SCAN_STDOPT;
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#ifdef BOUNCE
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static int bflag = 0; /*
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* send a failure (bounce) message to the
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* sender. This probably isn't a good idea
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* since most reply addresses will be fake
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*
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* TODO: Perhaps we can have an option to
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* bounce outgoing mail, but not incoming?
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*/
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#endif
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static const char *iface; /*
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* Broadcast a message when a virus is found,
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* this allows remote network management
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*/
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static int broadcastSock = -1;
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static int pflag = 0; /*
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* Send a warning to the postmaster only,
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* this means user's won't be told when someone
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* sent them a virus
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*/
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static int qflag = 0; /*
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* Send no warnings when a virus is found,
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* this means that the only log of viruses
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* found is the syslog, so it's best to
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* enable LogSyslog in clamd.conf
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*/
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static int Sflag = 0; /*
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* Add a signature to each message that
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* has been scanned
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*/
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static const char *sigFilename; /*
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* File where the scanned message signature
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* can be found
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*/
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static char *quarantine; /*
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* If a virus is found in an email redirect
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* it to this account
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*/
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static char *quarantine_dir; /*
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* Path to store messages before scanning.
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* Infected ones will be left there.
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*/
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static int nflag = 0; /*
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* Don't add X-Virus-Scanned to header. Patch
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* from Dirk Meyer <dirk.meyer@dinoex.sub.org>
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*/
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static int rejectmail = 1; /*
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* Send a 550 rejection when a virus is
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* found
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*/
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static int hflag = 0; /*
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* Include original message headers in
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* report
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*/
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static int cl_error = SMFIS_TEMPFAIL; /*
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* If an error occurs, return
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* this status. Allows messages
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* to be passed through
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* unscanned in the event of
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* an error. Patch from
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* Joe Talbott <josepht@cstone.net>
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*/
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static int readTimeout = DEFAULT_TIMEOUT; /*
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* number of seconds to wait for clamd to
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* respond, see ReadTimeout in clamd.conf
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*/
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static long streamMaxLength = -1; /* StreamMaxLength from clamd.conf */
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static int logok = 0; /*
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* Add clean items to the log file
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*/
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static char *signature = N_("-- \nScanned by ClamAv - http://www.clamav.net\n");
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static time_t signatureStamp;
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static char *templateFile; /* e-mail to be sent when virus detected */
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static char *templateHeaders; /* headers to be added to the above */
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static const char *tmpdir;
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#ifdef CL_DEBUG
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static int debug_level = 0;
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#endif
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static pthread_mutex_t n_children_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_cond_t n_children_cond = PTHREAD_COND_INITIALIZER;
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static int n_children = 0;
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static int max_children = 0;
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static unsigned int freshclam_monitor = 10; /*
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* how often, in
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* seconds, to scan for
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* database updates
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*/
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static int child_timeout = 300; /* number of seconds to wait for
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* a child to die. Set to 0 to
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* wait forever
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*/
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static int dont_wait = 0; /*
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* If 1 send retry later to the remote end
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* if max_chilren is exceeded, otherwise we
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* wait for the number to go down
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*/
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static int advisory = 0; /*
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* Run clamav-milter in advisory mode - viruses
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* are flagged rather than deleted. Incompatible
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* with quarantine options
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*/
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static int detect_forged_local_address; /*
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* for incoming only mail servers, drop emails
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* claiming to be from us that must be false
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* Requires that -o, -l or -f are NOT given
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*/
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static const char *pidFile;
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static struct cfgstruct *copt;
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static const char *localSocket; /* milter->clamd comms */
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static in_port_t tcpSocket; /* milter->clamd comms */
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static char *port = NULL; /* sendmail->milter comms */
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|
|
static const char *serverHostNames = "127.0.0.1";
|
|
#if HAVE_IN_ADDR_T
|
|
static in_addr_t *serverIPs; /* IPv4 only, in network byte order */
|
|
#else
|
|
static long *serverIPs; /* IPv4 only, in network byte order */
|
|
#endif
|
|
static int numServers; /* number of elements in serverIPs array */
|
|
#ifndef SESSION
|
|
#define RETRY_SECS 300 /* How often to retry a server that's down */
|
|
static time_t *last_failed_pings; /* For servers that are down. NB: not mutexed */
|
|
#endif
|
|
static char *rootdir; /* for chroot */
|
|
|
|
#ifdef SESSION
|
|
static struct session {
|
|
int sock; /* fd */
|
|
enum { CMDSOCKET_FREE, CMDSOCKET_INUSE, CMDSOCKET_DOWN } status;
|
|
} *sessions; /* max_children elements in the array */
|
|
static pthread_mutex_t sstatus_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
#endif /*SESSION*/
|
|
|
|
static pthread_cond_t watchdog_cond = PTHREAD_COND_INITIALIZER;
|
|
|
|
#ifndef SHUT_RD
|
|
#define SHUT_RD 0
|
|
#endif
|
|
#ifndef SHUT_WR
|
|
#define SHUT_WR 1
|
|
#endif
|
|
|
|
static const char *postmaster = "postmaster";
|
|
static const char *from = "MAILER-DAEMON";
|
|
static int quitting;
|
|
static const char *report; /* Report Phishing to this address */
|
|
|
|
static const char *whitelistFile; /*
|
|
* file containing destination email
|
|
* addresses that we don't scan
|
|
*/
|
|
static const char *sendmailCF; /* location of sendmail.cf to verify */
|
|
static const char *pidfile;
|
|
static int black_hole_mode; /*
|
|
* Since sendmail calls its milters before it
|
|
* looks in /etc/aliases we can spend time
|
|
* looking for malware that's going to be
|
|
* thrown away even if the message is clean.
|
|
* Enable this to not scan these messages.
|
|
* Sadly, because these days sendmail -bv
|
|
* only works as root, you can't use this with
|
|
* the User directive, which some won't like
|
|
* which also may contain the real target name
|
|
*
|
|
* smfi_getsymval(ctx, "{rcpt_addr}") only
|
|
* handles virtuser, it doesn't also deref
|
|
* the alias table, so it isn't any help
|
|
*/
|
|
|
|
static table_t *blacklist; /* never freed */
|
|
static int blacklist_time; /* How long to blacklist an IP */
|
|
static pthread_mutex_t blacklist_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
#ifdef CL_DEBUG
|
|
#if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1
|
|
#define HAVE_BACKTRACE
|
|
#endif
|
|
#endif
|
|
|
|
static void sigsegv(int sig);
|
|
|
|
#ifdef HAVE_BACKTRACE
|
|
#include <execinfo.h>
|
|
|
|
static void print_trace(void);
|
|
|
|
#define BACKTRACE_SIZE 200
|
|
|
|
#endif
|
|
|
|
static int verifyIncomingSocketName(const char *sockName);
|
|
static int isWhitelisted(const char *emailaddress, int to);
|
|
static int isBlacklisted(const char *ip_address);
|
|
static table_t *mx(const char *host, table_t *t);
|
|
#ifdef HAVE_RESOLV_H
|
|
static table_t *resolve(const char *host, table_t *t);
|
|
static int spf(struct privdata *privdata, table_t *prevhosts);
|
|
static void spf_ip(char *ip, int zero, void *v);
|
|
#endif
|
|
static sfsistat black_hole(const struct privdata *privdata);
|
|
static int useful_header(const char *cmd);
|
|
|
|
extern short logg_time, logg_lock, logg_verbose, logg_foreground;
|
|
extern int logg_size;
|
|
|
|
static void
|
|
help(void)
|
|
{
|
|
printf("\n\tclamav-milter version %s\n", CM_VERSION);
|
|
puts("\tCopyright (C) 2007 Nigel Horne <njh@clamav.net>\n");
|
|
|
|
puts(_("\t--advisory\t\t-A\tFlag viruses rather than deleting them."));
|
|
puts(_("\t--blacklist-time=SECS\t-k\tTime (in seconds) to blacklist an IP."));
|
|
puts(_("\t--black-hole-mode\t\tDon't scan messages aliased to /dev/null."));
|
|
#ifdef BOUNCE
|
|
puts(_("\t--bounce\t\t-b\tSend a failure message to the sender."));
|
|
#endif
|
|
puts(_("\t--broadcast\t\t-B [IFACE]\tBroadcast to a network manager when a virus is found."));
|
|
puts(_("\t--chroot=DIR\t\t-C DIR\tChroot to dir when starting."));
|
|
puts(_("\t--config-file=FILE\t-c FILE\tRead configuration from FILE."));
|
|
puts(_("\t--debug\t\t\t-D\tPrint debug messages."));
|
|
puts(_("\t--detect-forged-local-address\t-L\tReject mails that claim to be from us."));
|
|
puts(_("\t--dont-blacklist\t-K\tDon't blacklist a given IP."));
|
|
puts(_("\t--dont-scan-on-error\t-d\tPass e-mails through unscanned if a system error occurs."));
|
|
puts(_("\t--dont-wait\t\t\tAsk remote end to resend if max-children exceeded."));
|
|
puts(_("\t--external\t\t-e\tUse an external scanner (usually clamd)."));
|
|
puts(_("\t--freshclam-monitor=SECS\t-M SECS\tHow often to check for database update."));
|
|
puts(_("\t--from=EMAIL\t\t-a EMAIL\tError messages come from here."));
|
|
puts(_("\t--force-scan\t\t-f\tForce scan all messages (overrides (-o and -l)."));
|
|
puts(_("\t--help\t\t\t-h\tThis message."));
|
|
puts(_("\t--headers\t\t-H\tInclude original message headers in the report."));
|
|
puts(_("\t--ignore IPaddr\t\t-I IPaddr\tAdd IPaddr to LAN IP list (see --local)."));
|
|
puts(_("\t--local\t\t\t-l\tScan messages sent from machines on our LAN."));
|
|
puts(_("\t--max-childen\t\t-m\tMaximum number of concurrent scans."));
|
|
puts(_("\t--outgoing\t\t-o\tScan outgoing messages from this machine."));
|
|
puts(_("\t--noreject\t\t-N\tDon't reject viruses, silently throw them away."));
|
|
puts(_("\t--noxheader\t\t-n\tSuppress X-Virus-Scanned/X-Virus-Status headers."));
|
|
puts(_("\t--pidfile=FILE\t\t-i FILE\tLocation of pidfile."));
|
|
puts(_("\t--postmaster\t\t-p EMAIL\tPostmaster address [default=postmaster]."));
|
|
puts(_("\t--postmaster-only\t-P\tSend notifications only to the postmaster."));
|
|
puts(_("\t--quiet\t\t\t-q\tDon't send e-mail notifications of interceptions."));
|
|
puts(_("\t--quarantine=USER\t-Q EMAIL\tQuarantine e-mail account."));
|
|
puts(_("\t--report-phish=EMAIL\t-r EMAIL\tReport phish to this email address."));
|
|
puts(_("\t--quarantine-dir=DIR\t-U DIR\tDirectory to store infected emails."));
|
|
puts(_("\t--server=SERVER\t\t-s SERVER\tHostname/IP address of server(s) running clamd (when using TCPsocket)."));
|
|
puts(_("\t--sendmail-cf=FILE\t\tLocation of the sendmail.cf file to verify"));
|
|
puts(_("\t--sign\t\t\t-S\tAdd a hard-coded signature to each scanned message."));
|
|
puts(_("\t--signature-file=FILE\t-F FILE\tLocation of signature file."));
|
|
puts(_("\t--template-file=FILE\t-t FILE\tLocation of e-mail template file."));
|
|
puts(_("\t--template-headers=FILE\t\tLocation of e-mail headers for template file."));
|
|
puts(_("\t--timeout=SECS\t\t-T SECS\tTimeout waiting to childen to die."));
|
|
puts(_("\t--whitelist-file=FILE\t-W FILE\tLocation of the file of whitelisted addresses"));
|
|
puts(_("\t--version\t\t-V\tPrint the version number of this software."));
|
|
#ifdef CL_DEBUG
|
|
puts(_("\t--debug-level=n\t\t-x n\tSets the debug level to 'n'."));
|
|
#endif
|
|
puts(_("\nFor more information type \"man clamav-milter\"."));
|
|
puts(_("For bug reports, please refer to http://www.clamav.net/bugs"));
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
extern char *optarg;
|
|
int i, Bflag = 0, server = 0;
|
|
char *cfgfile = NULL;
|
|
const char *wont_blacklist = NULL;
|
|
const struct cfgstruct *cpt;
|
|
char version[VERSION_LENGTH + 1];
|
|
pthread_t tid;
|
|
#ifdef CL_DEBUG
|
|
int consolefd;
|
|
#endif
|
|
|
|
/*
|
|
* The SMFI_VERSION checks are for Sendmail 8.14, which I don't have
|
|
* yet, so I can't verify them
|
|
* Patch from Andy Fiddaman <clam@fiddaman.net>
|
|
*/
|
|
struct smfiDesc smfilter = {
|
|
"ClamAv", /* filter name */
|
|
SMFI_VERSION, /* version code -- leave untouched */
|
|
SMFIF_ADDHDRS|SMFIF_CHGHDRS, /* flags - we add and delete headers */
|
|
clamfi_connect, /* connexion callback */
|
|
#ifdef CL_DEBUG
|
|
clamfi_helo, /* HELO filter callback */
|
|
#else
|
|
NULL,
|
|
#endif
|
|
clamfi_envfrom, /* envelope sender filter callback */
|
|
clamfi_envrcpt, /* envelope recipient filter callback */
|
|
clamfi_header, /* header filter callback */
|
|
clamfi_eoh, /* end of header callback */
|
|
clamfi_body, /* body filter callback */
|
|
clamfi_eom, /* end of message callback */
|
|
clamfi_abort, /* message aborted callback */
|
|
clamfi_close, /* connexion cleanup callback */
|
|
#if SMFI_VERSION > 2
|
|
NULL, /* Unrecognised command */
|
|
#endif
|
|
#if SMFI_VERSION > 3
|
|
NULL, /* DATA command callback */
|
|
#endif
|
|
#if SMFI_VERSION >= 0x01000000
|
|
NULL, /* Negotiation callback */
|
|
#endif
|
|
};
|
|
|
|
#if defined(CL_DEBUG) && defined(C_LINUX)
|
|
struct rlimit rlim;
|
|
|
|
rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
|
|
if(setrlimit(RLIMIT_CORE, &rlim) < 0)
|
|
perror("setrlimit");
|
|
#endif
|
|
|
|
/*
|
|
* Temporarily enter guessed value into version, will
|
|
* be overwritten later by the value returned by clamd
|
|
*/
|
|
snprintf(version, sizeof(version) - 1,
|
|
"ClamAV version %s, clamav-milter version %s",
|
|
VERSION, CM_VERSION);
|
|
|
|
progname = strrchr(argv[0], '/');
|
|
if(progname)
|
|
progname++;
|
|
else
|
|
progname = "clamav-milter";
|
|
|
|
#ifdef C_LINUX
|
|
setlocale(LC_ALL, "");
|
|
bindtextdomain(progname, DATADIR"/clamav-milter/locale");
|
|
textdomain(progname);
|
|
#endif
|
|
|
|
for(;;) {
|
|
int opt_index = 0;
|
|
#ifdef BOUNCE
|
|
#ifdef CL_DEBUG
|
|
const char *args = "a:AbB:c:C:dDefF:I:k:K:lLm:M:nNop:PqQ:r:hHs:St:T:U:VwW:x:0:1:2";
|
|
#else
|
|
const char *args = "a:AbB:c:C:dDefF:I:k:K:lLm:M:nNop:PqQ:r:hHs:St:T:U:VwW:0:1:2";
|
|
#endif
|
|
#else /*!BOUNCE*/
|
|
#ifdef CL_DEBUG
|
|
const char *args = "a:AB:c:C:dDefF:I:k:K:lLm:M:nNop:PqQ:r:hHs:St:T:U:VwW:x:0:1:2";
|
|
#else
|
|
const char *args = "a:AB:c:C:dDefF:I:k:K:lLm:M:nNop:PqQ:r:hHs:St:T:U:VwW:0:1:2";
|
|
#endif
|
|
#endif /*BOUNCE*/
|
|
|
|
static struct option long_options[] = {
|
|
{
|
|
"from", 2, NULL, 'a'
|
|
},
|
|
{
|
|
"advisory", 0, NULL, 'A'
|
|
},
|
|
#ifdef BOUNCE
|
|
{
|
|
"bounce", 0, NULL, 'b'
|
|
},
|
|
#endif
|
|
{
|
|
"broadcast", 2, NULL, 'B'
|
|
},
|
|
{
|
|
"config-file", 1, NULL, 'c'
|
|
},
|
|
{
|
|
"chroot", 1, NULL, 'C'
|
|
},
|
|
{
|
|
"detect-forged-local-address", 0, NULL, 'L'
|
|
},
|
|
{
|
|
"dont-blacklist", 1, NULL, 'K'
|
|
},
|
|
{
|
|
"dont-scan-on-error", 0, NULL, 'd'
|
|
},
|
|
{
|
|
"dont-wait", 0, NULL, 'w'
|
|
},
|
|
{
|
|
"debug", 0, NULL, 'D'
|
|
},
|
|
{
|
|
"external", 0, NULL, 'e'
|
|
},
|
|
{
|
|
"force-scan", 0, NULL, 'f'
|
|
},
|
|
{
|
|
"headers", 0, NULL, 'H'
|
|
},
|
|
{
|
|
"help", 0, NULL, 'h'
|
|
},
|
|
{
|
|
"ignore", 1, NULL, 'I'
|
|
},
|
|
{
|
|
"pidfile", 1, NULL, 'i'
|
|
},
|
|
{
|
|
"blacklist-time", 1, NULL, 'k'
|
|
},
|
|
{
|
|
"local", 0, NULL, 'l'
|
|
},
|
|
{
|
|
"noreject", 0, NULL, 'N'
|
|
},
|
|
{
|
|
"noxheader", 0, NULL, 'n'
|
|
},
|
|
{
|
|
"outgoing", 0, NULL, 'o'
|
|
},
|
|
{
|
|
"postmaster", 1, NULL, 'p'
|
|
},
|
|
{
|
|
"postmaster-only", 0, NULL, 'P',
|
|
},
|
|
{
|
|
"quiet", 0, NULL, 'q'
|
|
},
|
|
{
|
|
"quarantine", 1, NULL, 'Q',
|
|
},
|
|
{
|
|
"report-phishing", 1, NULL, 'r'
|
|
},
|
|
{
|
|
"quarantine-dir", 1, NULL, 'U',
|
|
},
|
|
{
|
|
"max-children", 1, NULL, 'm'
|
|
},
|
|
{
|
|
"freshclam-monitor", 1, NULL, 'M'
|
|
},
|
|
{
|
|
"sendmail-cf", 1, NULL, '0'
|
|
},
|
|
{
|
|
"server", 1, NULL, 's'
|
|
},
|
|
{
|
|
"sign", 0, NULL, 'S'
|
|
},
|
|
{
|
|
"signature-file", 1, NULL, 'F'
|
|
},
|
|
{
|
|
"template-file", 1, NULL, 't'
|
|
},
|
|
{
|
|
"template-headers", 1, NULL, '1'
|
|
},
|
|
{
|
|
"timeout", 1, NULL, 'T'
|
|
},
|
|
{
|
|
"whitelist-file", 1, NULL, 'W'
|
|
},
|
|
{
|
|
"version", 0, NULL, 'V'
|
|
},
|
|
{
|
|
"black-hole-mode", 0, NULL, '2'
|
|
},
|
|
#ifdef CL_DEBUG
|
|
{
|
|
"debug-level", 1, NULL, 'x'
|
|
},
|
|
#endif
|
|
{
|
|
NULL, 0, NULL, '\0'
|
|
}
|
|
};
|
|
|
|
int ret = getopt_long(argc, argv, args, long_options, &opt_index);
|
|
|
|
if(ret == -1)
|
|
break;
|
|
else if(ret == 0)
|
|
ret = long_options[opt_index].val;
|
|
|
|
switch(ret) {
|
|
case 'a': /* e-mail errors from here */
|
|
/*
|
|
* optarg is optional - if you give --from
|
|
* then the --from is set to the orginal,
|
|
* probably forged, email address
|
|
*/
|
|
from = optarg;
|
|
break;
|
|
case 'A':
|
|
advisory++;
|
|
break;
|
|
#ifdef BOUNCE
|
|
case 'b': /* bounce worms/viruses */
|
|
bflag++;
|
|
break;
|
|
#endif
|
|
case 'B': /* broadcast */
|
|
Bflag++;
|
|
if(optarg)
|
|
iface = optarg;
|
|
break;
|
|
case 'c': /* where is clamd.conf? */
|
|
cfgfile = optarg;
|
|
break;
|
|
case 'C': /* chroot */
|
|
rootdir = optarg;
|
|
break;
|
|
case 'd': /* don't scan on error */
|
|
cl_error = SMFIS_ACCEPT;
|
|
break;
|
|
case 'D': /* enable debug messages */
|
|
cl_debug();
|
|
break;
|
|
case 'e': /* use clamd */
|
|
external++;
|
|
break;
|
|
case 'f': /* force the scan */
|
|
fflag++;
|
|
break;
|
|
case 'h':
|
|
help();
|
|
return EX_OK;
|
|
case 'H':
|
|
hflag++;
|
|
break;
|
|
case 'i': /* pidfile */
|
|
pidfile = optarg;
|
|
break;
|
|
case 'k': /* blacklist time */
|
|
blacklist_time = atoi(optarg);
|
|
break;
|
|
case 'K': /* don't black list given IP */
|
|
wont_blacklist = optarg;
|
|
break;
|
|
case 'I': /* --ignore, -I hostname */
|
|
/*
|
|
* Based on patch by jpd@louisiana.edu
|
|
*/
|
|
if(Iflag == IFLAG_MAX) {
|
|
fprintf(stderr,
|
|
_("%s: %s, -I may only be given %d times\n"),
|
|
argv[0], optarg, IFLAG_MAX);
|
|
return EX_USAGE;
|
|
}
|
|
if(!add_local_ip(optarg)) {
|
|
fprintf(stderr,
|
|
_("%s: Cannot convert -I%s to IPaddr\n"),
|
|
argv[0], optarg);
|
|
return EX_USAGE;
|
|
}
|
|
Iflag++;
|
|
break;
|
|
case 'l': /* scan mail from the lan */
|
|
lflag++;
|
|
break;
|
|
case 'L': /* detect forged local addresses */
|
|
detect_forged_local_address++;
|
|
break;
|
|
case 'm': /* maximum number of children */
|
|
max_children = atoi(optarg);
|
|
break;
|
|
case 'M': /* how often to monitor for freshclam */
|
|
freshclam_monitor = atoi(optarg);
|
|
break;
|
|
case 'n': /* don't add X-Virus-Scanned */
|
|
nflag++;
|
|
smfilter.xxfi_flags &= ~(SMFIF_ADDHDRS|SMFIF_CHGHDRS);
|
|
break;
|
|
case 'N': /* Do we reject mail or silently drop it */
|
|
rejectmail = 0;
|
|
break;
|
|
case 'o': /* scan outgoing mail */
|
|
oflag++;
|
|
break;
|
|
case 'p': /* postmaster e-mail address */
|
|
postmaster = optarg;
|
|
break;
|
|
case 'P': /* postmaster only */
|
|
pflag++;
|
|
break;
|
|
case 'q': /* send NO notification email */
|
|
qflag++;
|
|
break;
|
|
case 'Q': /* quarantine e-mail address */
|
|
quarantine = optarg;
|
|
smfilter.xxfi_flags |= SMFIF_CHGHDRS|SMFIF_ADDRCPT|SMFIF_DELRCPT;
|
|
break;
|
|
case 'r': /* report phishing here */
|
|
/* e.g. reportphishing@antiphishing.org */
|
|
report = optarg;
|
|
break;
|
|
case 's': /* server running clamd */
|
|
server++;
|
|
serverHostNames = optarg;
|
|
break;
|
|
case 'F': /* signature file */
|
|
sigFilename = optarg;
|
|
signature = NULL;
|
|
/* fall through */
|
|
case 'S': /* sign */
|
|
smfilter.xxfi_flags |= SMFIF_CHGBODY;
|
|
Sflag++;
|
|
break;
|
|
case 't': /* e-mail template file */
|
|
templateFile = optarg;
|
|
break;
|
|
case '1': /* headers for the template file */
|
|
templateHeaders = optarg;
|
|
break;
|
|
case '2':
|
|
black_hole_mode++;
|
|
break;
|
|
case 'T': /* time to wait for child to die */
|
|
child_timeout = atoi(optarg);
|
|
break;
|
|
case 'U': /* quarantine path */
|
|
quarantine_dir = optarg;
|
|
break;
|
|
case 'V':
|
|
puts(version);
|
|
return EX_OK;
|
|
case 'w':
|
|
dont_wait++;
|
|
break;
|
|
case 'W':
|
|
whitelistFile = optarg;
|
|
break;
|
|
case '0':
|
|
sendmailCF = optarg;
|
|
break;
|
|
#ifdef CL_DEBUG
|
|
case 'x':
|
|
debug_level = atoi(optarg);
|
|
break;
|
|
#endif
|
|
default:
|
|
#ifdef CL_DEBUG
|
|
fprintf(stderr, "Usage: %s [-b] [-c FILE] [-F FILE] [--max-children=num] [-e] [-l] [-o] [-p address] [-P] [-q] [-Q USER] [-s SERVER] [-S] [-x#] [-U PATH] [-M#] socket-addr\n", argv[0]);
|
|
#else
|
|
fprintf(stderr, "Usage: %s [-b] [-c FILE] [-F FILE] [--max-children=num] [-e] [-l] [-o] [-p address] [-P] [-q] [-Q USER] [-s SERVER] [-S] [-U PATH] [-M#] socket-addr\n", argv[0]);
|
|
#endif
|
|
return EX_USAGE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check sanity of --external and --server arguments
|
|
*/
|
|
if(server && !external) {
|
|
fprintf(stderr,
|
|
"%s: --server can only be used with --external\n",
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
#ifdef SESSION
|
|
if(!external) {
|
|
fprintf(stderr,
|
|
_("%s: SESSIONS mode requires --external\n"));
|
|
return EX_USAGE;
|
|
}
|
|
#endif
|
|
|
|
/* TODO: support freshclam's daemon notify if --external is not given */
|
|
|
|
if(optind == argc) {
|
|
fprintf(stderr, _("%s: No socket-addr given\n"), argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
port = argv[optind];
|
|
|
|
if(rootdir == NULL) /* FIXME: Handle CHROOT */
|
|
if(verifyIncomingSocketName(port) < 0) {
|
|
fprintf(stderr, _("%s: socket-addr (%s) doesn't agree with sendmail.cf\n"), argv[0], port);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
if(strncasecmp(port, "inet:", 5) == 0)
|
|
if(!lflag) {
|
|
/*
|
|
* Barmy but true. It seems that clamfi_connect will,
|
|
* in this case, get the IP address of the machine
|
|
* running sendmail, not of the machine sending the
|
|
* mail, so the remote end will be a local address so
|
|
* we must scan by enabling --local
|
|
*
|
|
* TODO: this is probably not needed if the remote
|
|
* machine is localhost, need to check though
|
|
*/
|
|
fprintf(stderr, _("%s: when using inet: connexion to sendmail you must enable --local\n"), argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
|
|
/*
|
|
* Sanity checks on the clamav configuration file
|
|
*/
|
|
if(cfgfile == NULL) {
|
|
cfgfile = cli_malloc(strlen(CONFDIR) + 12); /* leak */
|
|
sprintf(cfgfile, "%s/clamd.conf", CONFDIR);
|
|
}
|
|
if((copt = getcfg(cfgfile, 1)) == NULL) {
|
|
fprintf(stderr, _("%s: Can't parse the config file %s\n"),
|
|
argv[0], cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
if(detect_forged_local_address) {
|
|
if(oflag) {
|
|
fprintf(stderr, _("%s: --detect-forged-local-addresses is not compatible with --outgoing\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
if(lflag) {
|
|
fprintf(stderr, _("%s: --detect-forged-local-addresses is not compatible with --local\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
if(fflag) {
|
|
fprintf(stderr, _("%s: --detect-forged-local-addresses is not compatible with --force\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
|
|
if(Bflag) {
|
|
int on;
|
|
|
|
broadcastSock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
/*
|
|
* SO_BROADCAST doesn't sent to all NICs on Linux, it only
|
|
* broadcasts on eth0, which is why there's an optional argument
|
|
* to --broadcast to say which NIC to broadcast on. You can use
|
|
* SO_BINDTODEVICE to get around that, but you need to have
|
|
* uid == 0 for that
|
|
*/
|
|
on = 1;
|
|
if(setsockopt(broadcastSock, SOL_SOCKET, SO_BROADCAST, (int *)&on, sizeof(on)) < 0) {
|
|
perror("setsockopt");
|
|
return EX_UNAVAILABLE;
|
|
}
|
|
shutdown(broadcastSock, SHUT_RD);
|
|
}
|
|
|
|
/*
|
|
* Drop privileges
|
|
*/
|
|
#ifdef CL_DEBUG
|
|
/* Save the fd for later, open while we can */
|
|
consolefd = open(console, O_WRONLY);
|
|
#endif
|
|
|
|
if(getuid() == 0) {
|
|
if(iface) {
|
|
#ifdef SO_BINDTODEVICE
|
|
struct ifreq ifr;
|
|
|
|
memset(&ifr, '\0', sizeof(struct ifreq));
|
|
strncpy(ifr.ifr_name, iface, sizeof(ifr.ifr_name) - 1);
|
|
if(setsockopt(broadcastSock, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) {
|
|
perror(iface);
|
|
return EX_CONFIG;
|
|
}
|
|
#else
|
|
fprintf(stderr, _("%s: The iface option to --broadcast is not supported on your operating system\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
#endif
|
|
}
|
|
|
|
if(((cpt = cfgopt(copt, "User")) != NULL) && cpt->enabled) {
|
|
const struct passwd *user;
|
|
|
|
if((user = getpwnam(cpt->strarg)) == NULL) {
|
|
fprintf(stderr, _("%s: Can't get information about user %s\n"), argv[0], cpt->strarg);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
if(cfgopt(copt, "AllowSupplementaryGroups")->enabled) {
|
|
#ifdef HAVE_INITGROUPS
|
|
if(initgroups(cpt->strarg, user->pw_gid) < 0) {
|
|
perror(cpt->strarg);
|
|
return EX_CONFIG;
|
|
}
|
|
#else
|
|
fprintf(stderr, _("%s: AllowSupplementaryGroups: initgroups not supported.\n"),
|
|
argv[0]);
|
|
return EX_CONFIG;
|
|
#endif
|
|
} else {
|
|
#ifdef HAVE_SETGROUPS
|
|
if(setgroups(1, &user->pw_gid) < 0) {
|
|
perror(cpt->strarg);
|
|
return EX_CONFIG;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
setgid(user->pw_gid);
|
|
|
|
if(setuid(user->pw_uid) < 0)
|
|
perror(cpt->strarg);
|
|
else
|
|
cli_dbgmsg(_("Running as user %s (UID %d, GID %d)\n"),
|
|
cpt->strarg, (int)user->pw_uid,
|
|
(int)user->pw_gid);
|
|
|
|
/*
|
|
* Note, some O/Ss (e.g. OpenBSD/Fedora Linux) FORCE
|
|
* you to run as root in black-hole-mode because
|
|
* /var/spool/mqueue is mode 700 owned by root!
|
|
* Flames to them, not to me, please.
|
|
*/
|
|
if(black_hole_mode && (user->pw_uid != 0)) {
|
|
int are_trusted;
|
|
FILE *sendmail;
|
|
char cmd[128];
|
|
|
|
/*
|
|
* Determine if we're a "trusted user"
|
|
*/
|
|
snprintf(cmd, sizeof(cmd) - 1, "%s -bv root</dev/null 2>&1",
|
|
SENDMAIL_BIN);
|
|
|
|
sendmail = popen(cmd, "r");
|
|
|
|
if(sendmail == NULL) {
|
|
perror(SENDMAIL_BIN);
|
|
are_trusted = 0;
|
|
} else {
|
|
int status;
|
|
char buf[BUFSIZ];
|
|
|
|
while(fgets(buf, sizeof(buf), sendmail) != NULL)
|
|
;
|
|
/*
|
|
* Can't do
|
|
* switch(WEXITSTATUS(pclose(sendmail)))
|
|
* because that fails to compile on
|
|
* NetBSD2.0
|
|
*/
|
|
status = pclose(sendmail);
|
|
switch(WEXITSTATUS(status)) {
|
|
case EX_NOUSER:
|
|
/*
|
|
* No root? But at least
|
|
* we're trusted enough
|
|
* to find out!
|
|
*/
|
|
are_trusted = 1;
|
|
break;
|
|
default:
|
|
are_trusted = 0;
|
|
break;
|
|
case EX_OK:
|
|
are_trusted = 1;
|
|
}
|
|
}
|
|
if(!are_trusted) {
|
|
fprintf(stderr, _("%s: You cannot use black hole mode unless %s is a TrustedUser\n"),
|
|
argv[0], cpt->strarg);
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
} else
|
|
logg(_("^%s: running as root is not recommended (check \"User\" in %s)\n"), argv[0], cfgfile);
|
|
} else if(iface) {
|
|
fprintf(stderr, _("%s: Only root can set an interface for --broadcast\n"), argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
|
|
if(advisory && quarantine) {
|
|
fprintf(stderr, _("%s: Advisory mode doesn't work with quarantine mode\n"), argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
if(quarantine_dir) {
|
|
struct stat statb;
|
|
|
|
if(advisory) {
|
|
fprintf(stderr,
|
|
_("%s: Advisory mode doesn't work with quarantine directories\n"),
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
if(strstr(quarantine_dir, "ERROR") != NULL) {
|
|
fprintf(stderr,
|
|
_("%s: the quarantine directory must not contain the string 'ERROR'\n"),
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
if(strstr(quarantine_dir, "FOUND") != NULL) {
|
|
fprintf(stderr,
|
|
_("%s: the quarantine directory must not contain the string 'FOUND'\n"),
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
if(strstr(quarantine_dir, "OK") != NULL) {
|
|
fprintf(stderr,
|
|
_("%s: the quarantine directory must not contain the string 'OK'\n"),
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
if(access(quarantine_dir, W_OK) < 0) {
|
|
perror(quarantine_dir);
|
|
return EX_USAGE;
|
|
}
|
|
if(stat(quarantine_dir, &statb) < 0) {
|
|
perror(quarantine_dir);
|
|
return EX_USAGE;
|
|
}
|
|
/*
|
|
* Quit if the quarantine directory is publically readable
|
|
* or writeable
|
|
*/
|
|
if(statb.st_mode & 077) {
|
|
fprintf(stderr, _("%s: insecure quarantine directory %s (mode 0%o)\n"),
|
|
argv[0], quarantine_dir, (int)statb.st_mode & 0777);
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
|
|
if(sigFilename && !updateSigFile())
|
|
return EX_USAGE;
|
|
|
|
if(templateFile && (access(templateFile, R_OK) < 0)) {
|
|
perror(templateFile);
|
|
return EX_CONFIG;
|
|
}
|
|
if(templateHeaders) {
|
|
if(templateFile == NULL) {
|
|
fputs(("%s: --template-headers requires --template-file\n"),
|
|
stderr);
|
|
return EX_CONFIG;
|
|
}
|
|
if(access(templateHeaders, R_OK) < 0) {
|
|
perror(templateHeaders);
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
if(whitelistFile && (access(whitelistFile, R_OK) < 0)) {
|
|
perror(whitelistFile);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
/*
|
|
* If the --max-children flag isn't set, see if MaxThreads
|
|
* is set in the config file. Based on an idea by "Richard G. Roberto"
|
|
* <rgr@dedlegend.com>
|
|
*/
|
|
if((max_children == 0) && ((cpt = cfgopt(copt, "MaxThreads")) != NULL))
|
|
max_children = cfgopt(copt, "MaxThreads")->numarg;
|
|
|
|
if((cpt = cfgopt(copt, "ReadTimeout")) != NULL) {
|
|
readTimeout = cpt->numarg;
|
|
|
|
if(readTimeout < 0) {
|
|
fprintf(stderr, _("%s: ReadTimeout must not be negative in %s\n"),
|
|
argv[0], cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
|
|
if((cpt = cfgopt(copt, "StreamMaxLength")) != NULL) {
|
|
streamMaxLength = (long)cpt->numarg;
|
|
if(streamMaxLength < 0L) {
|
|
fprintf(stderr, _("%s: StreamMaxLength must not be negative in %s\n"),
|
|
argv[0], cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
|
|
if(((cpt = cfgopt(copt, "LogSyslog")) != NULL) && cpt->enabled) {
|
|
#if defined(USE_SYSLOG) && !defined(C_AIX)
|
|
int fac = LOG_LOCAL6;
|
|
#endif
|
|
|
|
if(cfgopt(copt, "LogVerbose")->enabled) {
|
|
logg_verbose = 1;
|
|
#ifdef CL_DEBUG
|
|
#if ((SENDMAIL_VERSION_A > 8) || ((SENDMAIL_VERSION_A == 8) && (SENDMAIL_VERSION_B >= 13)))
|
|
if(debug_level >= 15)
|
|
smfi_setdbg(6);
|
|
#endif
|
|
#endif
|
|
}
|
|
#if defined(USE_SYSLOG) && !defined(C_AIX)
|
|
logg_syslog = 1;
|
|
|
|
if(((cpt = cfgopt(copt, "LogFacility")) != NULL) && cpt->enabled)
|
|
if((fac = logg_facility(cpt->strarg)) == -1) {
|
|
fprintf(stderr, "%s: LogFacility: %s: No such facility\n",
|
|
argv[0], cpt->strarg);
|
|
return EX_CONFIG;
|
|
}
|
|
openlog(progname, LOG_CONS|LOG_PID, fac);
|
|
#endif
|
|
} else {
|
|
if(qflag)
|
|
fprintf(stderr, _("%s: (-q && !LogSyslog): warning - all interception message methods are off\n"),
|
|
argv[0]);
|
|
#if defined(USE_SYSLOG) && !defined(C_AIX)
|
|
logg_syslog = 0;
|
|
#endif
|
|
}
|
|
/*
|
|
* Get the outgoing socket details - the way to talk to clamd, unless
|
|
* we're doing the scanning internally
|
|
*/
|
|
if(!external) {
|
|
#ifdef C_LINUX
|
|
const char *lang;
|
|
#endif
|
|
|
|
if(max_children == 0) {
|
|
fprintf(stderr, _("%s: --max-children must be given if --external is not given\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
if(freshclam_monitor <= 0) {
|
|
fprintf(stderr, _("%s: --freshclam_monitor must be at least one second\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
#ifdef C_LINUX
|
|
lang = getenv("LANG");
|
|
|
|
if(lang && (strstr(lang, "UTF-8") != NULL)) {
|
|
fprintf(stderr, "Your LANG environment variable is set to '%s'\n", lang);
|
|
fprintf(stderr, "This is known to cause problems for some %s installations.\n", argv[0]);
|
|
fputs("If you get failures with temporary files, please try again with LANG unset.\n", stderr);
|
|
}
|
|
#endif
|
|
#if 0
|
|
if(child_timeout) {
|
|
fprintf(stderr, _("%s: --timeout must not be given if --external is not given\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
#endif
|
|
if(loadDatabase() != 0) {
|
|
/*
|
|
* Handle the dont-scan-on-error option, which says
|
|
* that we pass on emails, unscanned, if an error has
|
|
* occurred
|
|
*/
|
|
if(cl_error != SMFIS_ACCEPT)
|
|
return EX_CONFIG;
|
|
|
|
fprintf(stderr, _("%s: No emails will be scanned"),
|
|
argv[0]);
|
|
}
|
|
numServers = 1;
|
|
} else if(((cpt = cfgopt(copt, "LocalSocket")) != NULL) && cpt->enabled) {
|
|
#ifdef SESSION
|
|
struct sockaddr_un sockun;
|
|
#endif
|
|
char *sockname = NULL;
|
|
|
|
if(cfgopt(copt, "TCPSocket")->enabled) {
|
|
fprintf(stderr, _("%s: You can select one server type only (local/TCP) in %s\n"),
|
|
argv[0], cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
if(server) {
|
|
fprintf(stderr, _("%s: You cannot use the --server option when using LocalSocket in %s\n"),
|
|
argv[0], cfgfile);
|
|
return EX_USAGE;
|
|
}
|
|
if(strncasecmp(port, "unix:", 5) == 0)
|
|
sockname = &port[5];
|
|
else if(strncasecmp(port, "local:", 6) == 0)
|
|
sockname = &port[6];
|
|
|
|
if(sockname && (strcmp(sockname, cpt->strarg) == 0)) {
|
|
fprintf(stderr, _("The connexion from sendmail to %s (%s) must not\n"),
|
|
argv[0], sockname);
|
|
fprintf(stderr, _("be the same as the connexion to clamd (%s) in %s\n"),
|
|
cpt->strarg, cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
/*
|
|
* TODO: check --server hasn't been set
|
|
*/
|
|
localSocket = cpt->strarg;
|
|
#ifndef SESSION
|
|
if(!pingServer(-1)) {
|
|
fprintf(stderr, _("Can't talk to clamd server via %s\n"),
|
|
localSocket);
|
|
fprintf(stderr, _("Check your entry for LocalSocket in %s\n"),
|
|
cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
#endif
|
|
/*if(quarantine_dir == NULL)
|
|
fprintf(stderr, _("When using Localsocket in %s\nyou may improve performance if you use the --quarantine-dir option\n"), cfgfile);*/
|
|
|
|
umask(077);
|
|
|
|
serverIPs = (in_addr_t *)cli_malloc(sizeof(in_addr_t));
|
|
#ifdef INADDR_LOOPBACK
|
|
serverIPs[0] = htonl(INADDR_LOOPBACK);
|
|
#else
|
|
serverIPs[0] = inet_addr("127.0.0.1");
|
|
#endif
|
|
|
|
#ifdef SESSION
|
|
memset((char *)&sockun, 0, sizeof(struct sockaddr_un));
|
|
sockun.sun_family = AF_UNIX;
|
|
strncpy(sockun.sun_path, localSocket, sizeof(sockun.sun_path));
|
|
|
|
sessions = (struct session *)cli_malloc(sizeof(struct session));
|
|
if((sessions[0].sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
|
|
perror(localSocket);
|
|
fprintf(stderr, _("Can't talk to clamd server via %s\n"),
|
|
localSocket);
|
|
fprintf(stderr, _("Check your entry for LocalSocket in %s\n"),
|
|
cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
if(connect(sessions[0].sock, (struct sockaddr *)&sockun, sizeof(struct sockaddr_un)) < 0) {
|
|
perror(localSocket);
|
|
return EX_UNAVAILABLE;
|
|
}
|
|
if(send(sessions[0].sock, "SESSION\n", 8, 0) < 8) {
|
|
perror("send");
|
|
fputs(_("!Can't create a clamd session"), stderr);
|
|
return EX_UNAVAILABLE;
|
|
}
|
|
sessions[0].status = CMDSOCKET_FREE;
|
|
#endif
|
|
/*
|
|
* FIXME: Allow connexion to remote servers by TCP/IP whilst
|
|
* connecting to the localserver via a UNIX domain socket
|
|
*/
|
|
numServers = 1;
|
|
} else if(((cpt = cfgopt(copt, "TCPSocket")) != NULL) && cpt->enabled) {
|
|
int activeServers;
|
|
|
|
/*
|
|
* TCPSocket is in fact a port number not a full socket
|
|
*/
|
|
if(quarantine_dir) {
|
|
fprintf(stderr, _("%s: --quarantine-dir not supported for TCPSocket - use --quarantine\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
tcpSocket = (in_port_t)cpt->numarg;
|
|
|
|
/*
|
|
* cli_strtok's fieldno counts from 0
|
|
*/
|
|
for(;;) {
|
|
char *hostname = cli_strtok(serverHostNames, numServers, ":");
|
|
if(hostname == NULL)
|
|
break;
|
|
#ifdef MAXHOSTNAMELEN
|
|
if(strlen(hostname) > MAXHOSTNAMELEN) {
|
|
fprintf(stderr, _("%s: hostname %s is longer than %d characters\n"),
|
|
argv[0], hostname, MAXHOSTNAMELEN);
|
|
return EX_CONFIG;
|
|
}
|
|
#endif
|
|
numServers++;
|
|
free(hostname);
|
|
}
|
|
|
|
cli_dbgmsg("numServers: %d\n", numServers);
|
|
|
|
serverIPs = (in_addr_t *)cli_malloc(numServers * sizeof(in_addr_t));
|
|
activeServers = 0;
|
|
|
|
#ifdef SESSION
|
|
/*
|
|
* We need to know how many connexion to establish to clamd
|
|
*/
|
|
if(max_children == 0) {
|
|
fprintf(stderr, _("%s: --max-children must be given in sessions mode\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
#endif
|
|
|
|
if(numServers > max_children) {
|
|
fprintf(stderr, _("%1$s: --max-children (%2$d) is lower than the number of servers you have (%3$d)\n"),
|
|
argv[0], max_children, numServers);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
for(i = 0; i < numServers; i++) {
|
|
#ifdef MAXHOSTNAMELEN
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
|
|
if(cli_strtokbuf(serverHostNames, i, ":", hostname) == NULL)
|
|
break;
|
|
#else
|
|
char *hostname = cli_strtok(serverHostNames, i, ":");
|
|
#endif
|
|
|
|
/*
|
|
* Translate server's name to IP address
|
|
*/
|
|
serverIPs[i] = inet_addr(hostname);
|
|
#ifdef INADDR_NONE
|
|
if(serverIPs[i] == INADDR_NONE) {
|
|
#else
|
|
if(serverIPs[i] == (in_addr_t)-1) {
|
|
#endif
|
|
const struct hostent *h = gethostbyname(hostname);
|
|
|
|
if(h == NULL) {
|
|
fprintf(stderr, _("%s: Unknown host %s\n"),
|
|
argv[0], hostname);
|
|
return EX_USAGE;
|
|
}
|
|
|
|
memcpy((char *)&serverIPs[i], h->h_addr, sizeof(serverIPs[i]));
|
|
}
|
|
|
|
#if defined(NTRIES) && ((NTRIES > 1))
|
|
#ifndef SESSION
|
|
#ifdef INADDR_LOOPBACK
|
|
if(serverIPs[i] == htonl(INADDR_LOOPBACK)) {
|
|
#else
|
|
#if HAVE_IN_ADDR_T
|
|
if(serverIPs[i] == (in_addr_t)inet_addr("127.0.0.1")) {
|
|
#else
|
|
if(serverIPs[i] == (long)inet_addr("127.0.0.1")) {
|
|
#endif
|
|
#endif
|
|
int tries;
|
|
|
|
/*
|
|
* Fudge to allow clamd to come up on
|
|
* our local machine
|
|
*/
|
|
for(tries = 0; tries < NTRIES - 1; tries++) {
|
|
if(pingServer(i))
|
|
break;
|
|
if(checkClamd(1)) /* will try all servers */
|
|
break;
|
|
logg(_("Waiting for clamd to come up\n"));
|
|
/*
|
|
* something to do as the system starts
|
|
*/
|
|
sync();
|
|
sleep(1);
|
|
}
|
|
/* Will try one more time */
|
|
}
|
|
#endif /* NTRIES > 1 */
|
|
|
|
if(pingServer(i))
|
|
activeServers++;
|
|
else {
|
|
cli_warnmsg(_("Can't talk to clamd server %s on port %d\n"),
|
|
hostname, tcpSocket);
|
|
if(serverIPs[i] == htonl(INADDR_LOOPBACK)) {
|
|
if(cfgopt(copt, "TCPAddr")->enabled)
|
|
cli_warnmsg(_("Check the value for TCPAddr in %s\n"), cfgfile);
|
|
} else
|
|
cli_warnmsg(_("Check the value for TCPAddr in clamd.conf on %s\n"), hostname);
|
|
}
|
|
#endif
|
|
|
|
#ifndef MAXHOSTNAMELEN
|
|
free(hostname);
|
|
#endif
|
|
}
|
|
#ifdef SESSION
|
|
activeServers = numServers;
|
|
|
|
sessions = (struct session *)cli_calloc(max_children, sizeof(struct session));
|
|
for(i = 0; i < (int)max_children; i++)
|
|
if(createSession(i) < 0)
|
|
return EX_UNAVAILABLE;
|
|
if(activeServers == 0) {
|
|
logg(_("!Can't find any clamd server\n"));
|
|
cli_warnmsg(_("Check your entry for TCPSocket in %s\n"),
|
|
cfgfile);
|
|
}
|
|
#else
|
|
if(activeServers == 0) {
|
|
cli_errmsg(_("Check your entry for TCPSocket in %s\n"),
|
|
cfgfile);
|
|
logg(_("!Can't find any clamd server\n"));
|
|
return EX_CONFIG;
|
|
}
|
|
last_failed_pings = (time_t *)cli_calloc(numServers, sizeof(time_t));
|
|
#endif
|
|
} else {
|
|
fprintf(stderr, _("%s: You must select server type (local/TCP) in %s\n"),
|
|
argv[0], cfgfile);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
#ifdef SESSION
|
|
if(!external) {
|
|
if(clamav_versions == NULL) {
|
|
clamav_versions = (char **)cli_malloc(sizeof(char *));
|
|
if(clamav_versions == NULL)
|
|
return EX_TEMPFAIL;
|
|
clamav_version = cli_strdup(version);
|
|
}
|
|
} else {
|
|
unsigned int session;
|
|
|
|
/*
|
|
* We need to know how many connexion to establish to clamd
|
|
*/
|
|
if(max_children == 0) {
|
|
fprintf(stderr, _("%s: --max-children must be given in sessions mode\n"), argv[0]);
|
|
return EX_CONFIG;
|
|
}
|
|
|
|
clamav_versions = (char **)cli_malloc(max_children * sizeof(char *));
|
|
if(clamav_versions == NULL)
|
|
return EX_TEMPFAIL;
|
|
|
|
for(session = 0; session < max_children; session++) {
|
|
clamav_versions[session] = cli_strdup(version);
|
|
if(clamav_versions[session] == NULL)
|
|
return EX_TEMPFAIL;
|
|
}
|
|
}
|
|
#else
|
|
strcpy(clamav_version, version);
|
|
#endif
|
|
|
|
if(((quarantine_dir == NULL) && localSocket) || !external) {
|
|
/* set the temporary dir */
|
|
if((cpt = cfgopt(copt, "TemporaryDirectory")) && cpt->enabled) {
|
|
tmpdir = cpt->strarg;
|
|
cl_settempdir(tmpdir, (short)(cfgopt(copt, "LeaveTemporaryFiles")->enabled));
|
|
} else if((tmpdir = getenv("TMPDIR")) == (char *)NULL)
|
|
if((tmpdir = getenv("TMP")) == (char *)NULL)
|
|
if((tmpdir = getenv("TEMP")) == (char *)NULL)
|
|
#ifdef P_tmpdir
|
|
tmpdir = P_tmpdir;
|
|
#else
|
|
tmpdir = "/tmp";
|
|
#endif
|
|
|
|
/*
|
|
* TODO: investigate mkdtemp on LINUX and possibly others
|
|
*/
|
|
tmpdir = cli_gentemp(NULL);
|
|
|
|
cli_dbgmsg("Making %s\n", tmpdir);
|
|
|
|
if(mkdir(tmpdir, 0700)) {
|
|
perror(tmpdir);
|
|
return EX_CANTCREAT;
|
|
}
|
|
} else
|
|
tmpdir = NULL;
|
|
|
|
if(report) {
|
|
if(!cfgopt(copt, "PhishingSignatures")->enabled) {
|
|
fprintf(stderr, "%s: You have chosen --report, but PhishingSignatures is off in %s\n",
|
|
argv[0], cfgfile);
|
|
return EX_USAGE;
|
|
}
|
|
if((quarantine_dir == NULL) && (tmpdir == NULL)) {
|
|
/*
|
|
* Limitation: doesn't store message in a temporary
|
|
* file, so we won't be able to use mail < file
|
|
*/
|
|
fprintf(stderr, "%s: when using --external, --report-phish cannot be used without either LocalSocket or --quarantine\n",
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
if(lflag) {
|
|
/*
|
|
* Naturally, if you attempt to scan the phish you've
|
|
* just reported, it'll be blocked!
|
|
*/
|
|
fprintf(stderr, "%s: --report-phish cannot be used with --local\n",
|
|
argv[0]);
|
|
return EX_USAGE;
|
|
}
|
|
}
|
|
|
|
if(cfgopt(copt, "Foreground")->enabled)
|
|
logg_foreground = 1;
|
|
else {
|
|
logg_foreground = 0;
|
|
#ifdef CL_DEBUG
|
|
printf(_("When debugging it is recommended that you use Foreground mode in %s\n"), cfgfile);
|
|
puts(_("\tso that you can see all of the messages"));
|
|
#endif
|
|
|
|
switch(fork()) {
|
|
case -1:
|
|
perror("fork");
|
|
return EX_OSERR;
|
|
case 0: /* child */
|
|
break;
|
|
default: /* parent */
|
|
return EX_OK;
|
|
}
|
|
close(0);
|
|
open("/dev/null", O_RDONLY);
|
|
|
|
close(1);
|
|
|
|
/* initialize logger */
|
|
logg_lock = cfgopt(copt, "LogFileUnlock")->enabled;
|
|
logg_time = cfgopt(copt, "LogTime")->enabled;
|
|
logok = cfgopt(copt, "LogClean")->enabled;
|
|
logg_size = cfgopt(copt, "LogFileMaxSize")->numarg;
|
|
logg_verbose = mprintf_verbose = cfgopt(copt, "LogVerbose")->enabled;
|
|
|
|
if(cfgopt(copt, "Debug")->enabled) /* enable debug messages in libclamav */
|
|
cl_debug();
|
|
|
|
if((cpt = cfgopt(copt, "LogFile"))->enabled) {
|
|
time_t currtime;
|
|
|
|
logg_file = cpt->strarg;
|
|
if((strlen(logg_file) < 2) ||
|
|
((logg_file[0] != '/') && (logg_file[0] != '\\') && (logg_file[1] != ':'))) {
|
|
fprintf(stderr, "ERROR: LogFile requires full path.\n");
|
|
logg_close();
|
|
freecfg(copt);
|
|
return 1;
|
|
}
|
|
time(&currtime);
|
|
if(logg("#ClamAV-milter started at %s", ctime(&currtime))) {
|
|
fprintf(stderr, "ERROR: Problem with internal logger. Please check the permissions on the %s file.\n", logg_file);
|
|
logg_close();
|
|
freecfg(copt);
|
|
return 1;
|
|
}
|
|
} else {
|
|
#ifdef CL_DEBUG
|
|
logg_file = console;
|
|
if(consolefd < 0) {
|
|
perror(console);
|
|
return EX_OSFILE;
|
|
}
|
|
dup(consolefd);
|
|
#else
|
|
logg_file = NULL;
|
|
#endif
|
|
}
|
|
|
|
#if defined(USE_SYSLOG) && !defined(C_AIX)
|
|
if(cfgopt(copt, "LogSyslog")->enabled) {
|
|
int fac = LOG_LOCAL6;
|
|
|
|
cpt = cfgopt(copt, "LogFacility");
|
|
if((fac = logg_facility(cpt->strarg)) == -1) {
|
|
logg("!LogFacility: %s: No such facility.\n", cpt->strarg);
|
|
logg_close();
|
|
freecfg(copt);
|
|
return 1;
|
|
}
|
|
|
|
openlog("clamav-milter", LOG_PID, fac);
|
|
logg_syslog = 1;
|
|
}
|
|
#endif
|
|
|
|
close(2);
|
|
dup(1);
|
|
|
|
#ifdef CL_DEBUG
|
|
if(consolefd >= 0)
|
|
close(consolefd);
|
|
#endif
|
|
|
|
#ifdef HAVE_SETPGRP
|
|
#ifdef SETPGRP_VOID
|
|
setpgrp();
|
|
#else
|
|
setpgrp(0,0);
|
|
#endif
|
|
#else
|
|
#ifdef HAVE_SETSID
|
|
setsid();
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
if(cfgopt(copt, "Debug")->enabled)
|
|
/*
|
|
* enable debug messages in libclamav, --debug also does this
|
|
*/
|
|
cl_debug();
|
|
|
|
atexit(quit);
|
|
|
|
if(!external) {
|
|
/* TODO: read the limits from clamd.conf */
|
|
|
|
if(!cfgopt(copt, "ScanMail")->enabled)
|
|
printf(_("%s: ScanMail not defined in %s (needed without --external), enabling\n"),
|
|
argv[0], cfgfile);
|
|
|
|
options |= CL_SCAN_MAIL; /* no choice */
|
|
/*if(!cfgopt(copt, "ScanRAR")->enabled)
|
|
options |= CL_SCAN_DISABLERAR;*/
|
|
if(cfgopt(copt, "ArchiveBlockEncrypted")->enabled)
|
|
options |= CL_SCAN_BLOCKENCRYPTED;
|
|
if(cfgopt(copt, "ArchiveBlockMax")->enabled)
|
|
options |= CL_SCAN_BLOCKMAX;
|
|
if(cfgopt(copt, "ScanPE")->enabled)
|
|
options |= CL_SCAN_PE;
|
|
if(cfgopt(copt, "DetectBrokenExecutables")->enabled)
|
|
options |= CL_SCAN_BLOCKBROKEN;
|
|
if(cfgopt(copt, "MailFollowURLs")->enabled)
|
|
options |= CL_SCAN_MAILURL;
|
|
if(cfgopt(copt, "ScanOLE2")->enabled)
|
|
options |= CL_SCAN_OLE2;
|
|
if(cfgopt(copt, "ScanHTML")->enabled)
|
|
options |= CL_SCAN_HTML;
|
|
|
|
memset(&limits, '\0', sizeof(struct cl_limits));
|
|
|
|
if(((cpt = cfgopt(copt, "MailMaxRecursion")) != NULL) && cpt->enabled)
|
|
limits.maxmailrec = cpt->numarg;
|
|
|
|
if(cfgopt(copt, "ScanArchive")->enabled) {
|
|
options |= CL_SCAN_ARCHIVE;
|
|
if(((cpt = cfgopt(copt, "ArchiveMaxFileSize")) != NULL) && cpt->enabled)
|
|
limits.maxfilesize = cpt->numarg;
|
|
else
|
|
limits.maxfilesize = 10485760;
|
|
|
|
if(((cpt = cfgopt(copt, "ArchiveMaxRecursion")) != NULL) && cpt->enabled)
|
|
limits.maxreclevel = cpt->numarg;
|
|
else
|
|
limits.maxreclevel = 8;
|
|
|
|
if(((cpt = cfgopt(copt, "ArchiveMaxFiles")) != NULL) && cpt->enabled)
|
|
limits.maxfiles = cpt->numarg;
|
|
else
|
|
limits.maxfiles = 1000;
|
|
|
|
if(((cpt = cfgopt(copt, "ArchiveMaxCompressionRatio")) != NULL) && cpt->enabled)
|
|
limits.maxratio = cpt->numarg;
|
|
else
|
|
limits.maxratio = 250;
|
|
|
|
if(cfgopt(copt, "ArchiveLimitMemoryUsage")->enabled)
|
|
limits.archivememlim = 1;
|
|
else
|
|
limits.archivememlim = 0;
|
|
}
|
|
}
|
|
|
|
pthread_create(&tid, NULL, watchdog, NULL);
|
|
|
|
if(((cpt = cfgopt(copt, "PidFile")) != NULL) && cpt->enabled)
|
|
pidFile = cpt->strarg;
|
|
|
|
broadcast(_("Starting clamav-milter"));
|
|
|
|
if(rootdir) {
|
|
if(getuid() == 0) {
|
|
if(chdir(rootdir) < 0) {
|
|
perror(rootdir);
|
|
return EX_CONFIG;
|
|
}
|
|
if(chroot(rootdir) < 0) {
|
|
perror(rootdir);
|
|
return EX_CONFIG;
|
|
}
|
|
logg("Chrooted to %s\n", rootdir);
|
|
} else {
|
|
logg("!chroot option needs root\n");
|
|
return EX_CONFIG;
|
|
}
|
|
}
|
|
|
|
if(pidfile) {
|
|
/* save the PID */
|
|
char *p, *q;
|
|
FILE *fd;
|
|
const mode_t old_umask = umask(0006);
|
|
|
|
if(pidfile[0] != '/') {
|
|
logg(_("!pidfile: '%s' must be a full pathname"),
|
|
pidfile);
|
|
|
|
return EX_CONFIG;
|
|
}
|
|
p = cli_strdup(pidfile);
|
|
q = strrchr(p, '/');
|
|
*q = '\0';
|
|
|
|
if(rootdir == NULL)
|
|
if(chdir(p) < 0) /* safety */
|
|
perror(p);
|
|
|
|
free(p);
|
|
|
|
if((fd = fopen(pidfile, "w")) == NULL) {
|
|
logg(_("!Can't save PID in file %s\n"), pidfile);
|
|
return EX_CONFIG;
|
|
}
|
|
#ifdef C_LINUX
|
|
/* Ensure that all threads are kill()ed */
|
|
fprintf(fd, "-%d\n", (int)getpgrp());
|
|
#else
|
|
fprintf(fd, "%d\n", (int)getpid());
|
|
#endif
|
|
fclose(fd);
|
|
umask(old_umask);
|
|
} else if(tmpdir) {
|
|
if(rootdir == NULL)
|
|
chdir(tmpdir); /* safety */
|
|
} else
|
|
if(rootdir == NULL)
|
|
#ifdef P_tmpdir
|
|
chdir(P_tmpdir);
|
|
#else
|
|
chdir("/tmp");
|
|
#endif
|
|
|
|
if(cfgopt(copt, "FixStaleSocket")->enabled) {
|
|
/*
|
|
* Get the incoming socket details - the way sendmail talks to
|
|
* us
|
|
*
|
|
* TODO: There's a security problem here that'll need fixing if
|
|
* the User entry of clamd.conf is not used
|
|
*/
|
|
if(strncasecmp(port, "unix:", 5) == 0) {
|
|
if(unlink(&port[5]) < 0)
|
|
if(errno != ENOENT)
|
|
perror(&port[5]);
|
|
} else if(strncasecmp(port, "local:", 6) == 0) {
|
|
if(unlink(&port[6]) < 0)
|
|
if(errno != ENOENT)
|
|
perror(&port[6]);
|
|
} else if(port[0] == '/') {
|
|
if(unlink(port) < 0)
|
|
if(errno != ENOENT)
|
|
perror(port);
|
|
}
|
|
}
|
|
|
|
if(smfi_setconn(port) == MI_FAILURE) {
|
|
cli_errmsg("smfi_setconn failure\n");
|
|
return EX_SOFTWARE;
|
|
}
|
|
|
|
if(smfi_register(smfilter) == MI_FAILURE) {
|
|
cli_errmsg("smfi_register failure, ensure that you have linked against the correct version of sendmail\n");
|
|
return EX_UNAVAILABLE;
|
|
}
|
|
|
|
#if ((SENDMAIL_VERSION_A > 8) || ((SENDMAIL_VERSION_A == 8) && (SENDMAIL_VERSION_B >= 13)))
|
|
if(smfi_opensocket(1) == MI_FAILURE) {
|
|
perror(port);
|
|
cli_errmsg("Can't open/create %s\n", port);
|
|
return EX_CONFIG;
|
|
}
|
|
#endif
|
|
|
|
signal(SIGPIPE, SIG_IGN); /* libmilter probably does this as well */
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&version_mutex);
|
|
#endif
|
|
logg(_("Starting %s\n"), clamav_version);
|
|
logg(_("*Debugging is on\n"));
|
|
|
|
if(!(_res.options&RES_INIT))
|
|
if(res_init() < 0) {
|
|
fprintf(stderr, "%s: Can't initialise the resolver\n",
|
|
argv[0]);
|
|
return EX_UNAVAILABLE;
|
|
}
|
|
|
|
if(blacklist_time) {
|
|
char name[MAXHOSTNAMELEN + 1];
|
|
|
|
if(gethostname(name, sizeof(name)) < 0) {
|
|
perror("gethostname");
|
|
return EX_UNAVAILABLE;
|
|
}
|
|
|
|
blacklist = mx(name, NULL);
|
|
if(blacklist)
|
|
/* We must never blacklist ourself */
|
|
tableInsert(blacklist, "127.0.0.1", 0);
|
|
|
|
if(wont_blacklist) {
|
|
char *w;
|
|
|
|
i = 0;
|
|
while((w = cli_strtok(wont_blacklist, i++, ",")) != NULL) {
|
|
(void)tableInsert(blacklist, w, 0);
|
|
free(w);
|
|
}
|
|
}
|
|
tableIterate(blacklist, dump_blacklist, NULL);
|
|
}
|
|
|
|
cli_dbgmsg("Started: %s\n", clamav_version);
|
|
#ifdef SESSION
|
|
pthread_mutex_unlock(&version_mutex);
|
|
#endif
|
|
|
|
(void)signal(SIGSEGV, sigsegv);
|
|
|
|
return smfi_main();
|
|
}
|
|
|
|
#ifdef SESSION
|
|
/*
|
|
* Use the SESSION command of clamd.
|
|
* Returns -1 for terminal failure, 0 for OK, 1 for nonterminal failure
|
|
* The caller must take care of locking the sessions array
|
|
*/
|
|
static int
|
|
createSession(unsigned int s)
|
|
{
|
|
int ret = 0, fd;
|
|
const int serverNumber = s % numServers;
|
|
struct session *session = &sessions[s];
|
|
const struct protoent *proto;
|
|
struct sockaddr_in server;
|
|
|
|
cli_dbgmsg("createSession session %d, server %d\n", s, serverNumber);
|
|
assert(s < max_children);
|
|
|
|
memset((char *)&server, 0, sizeof(struct sockaddr_in));
|
|
server.sin_family = AF_INET;
|
|
server.sin_port = (in_port_t)htons(tcpSocket);
|
|
|
|
server.sin_addr.s_addr = serverIPs[serverNumber];
|
|
|
|
session->sock = -1;
|
|
proto = getprotobyname("tcp");
|
|
if(proto == NULL) {
|
|
fputs("Unknown prototol tcp, check /etc/protocols\n", stderr);
|
|
fd = ret = -1;
|
|
} else if((fd = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0) {
|
|
perror("socket");
|
|
ret = -1;
|
|
} else if(connect(fd, (struct sockaddr *)&server, sizeof(struct sockaddr_in)) < 0) {
|
|
perror("connect");
|
|
ret = 1;
|
|
} else if(send(fd, "SESSION\n", 8, 0) < 8) {
|
|
perror("send");
|
|
ret = 1;
|
|
}
|
|
|
|
if(ret != 0) {
|
|
#ifdef MAXHOSTNAMELEN
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
|
|
cli_strtokbuf(serverHostNames, serverNumber, ":", hostname);
|
|
if(strcmp(hostname, "127.0.0.1") == 0)
|
|
gethostname(hostname, sizeof(hostname));
|
|
#else
|
|
char *hostname = cli_strtok(serverHostNames, serverNumber, ":");
|
|
#endif
|
|
|
|
session->status = CMDSOCKET_DOWN;
|
|
|
|
if(fd >= 0)
|
|
close(fd);
|
|
|
|
cli_warnmsg(_("Check clamd server %s - it may be down\n"), hostname);
|
|
#ifndef MAXHOSTNAMELEN
|
|
free(hostname);
|
|
#endif
|
|
|
|
broadcast(_("Check clamd server - it may be down"));
|
|
} else
|
|
session->sock = fd;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* Verify that the server is where we think it is
|
|
* Returns true or false
|
|
*
|
|
* serverNumber counts from 0, but is only used for TCPSocket
|
|
*/
|
|
static int
|
|
pingServer(int serverNumber)
|
|
{
|
|
char *ptr;
|
|
int sock;
|
|
long nbytes;
|
|
char buf[128];
|
|
|
|
if(localSocket) {
|
|
struct sockaddr_un server;
|
|
|
|
memset((char *)&server, 0, sizeof(struct sockaddr_un));
|
|
server.sun_family = AF_UNIX;
|
|
strncpy(server.sun_path, localSocket, sizeof(server.sun_path));
|
|
|
|
if((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
|
|
perror(localSocket);
|
|
return 0;
|
|
}
|
|
checkClamd(1);
|
|
if(connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_un)) < 0) {
|
|
perror(localSocket);
|
|
close(sock);
|
|
return 0;
|
|
}
|
|
} else {
|
|
struct sockaddr_in server;
|
|
|
|
memset((char *)&server, 0, sizeof(struct sockaddr_in));
|
|
server.sin_family = AF_INET;
|
|
server.sin_port = (in_port_t)htons(tcpSocket);
|
|
|
|
assert(serverIPs != NULL);
|
|
#ifdef INADDR_NONE
|
|
assert(serverIPs[0] != INADDR_NONE);
|
|
#else
|
|
assert(serverIPs[0] != (in_addr_t)-1);
|
|
#endif
|
|
|
|
server.sin_addr.s_addr = serverIPs[serverNumber];
|
|
|
|
if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
perror("socket");
|
|
return 0;
|
|
}
|
|
if(connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_in)) < 0) {
|
|
int is_connected = 0;
|
|
|
|
#if (!defined(NTRIES)) || ((NTRIES <= 1))
|
|
if(errno == ECONNREFUSED) {
|
|
/*
|
|
* During startup there is a race condition:
|
|
* clamd can start and fork, then rc will start
|
|
* clamav-milter before clamd has run accept(2),
|
|
* so we fail to connect.
|
|
* In case this is the situation here, we wait
|
|
* for a couple of seconds and try again. The
|
|
* sync() is because during startup the machine
|
|
* won't be doing much for most of the time, so
|
|
* we may as well do something constructive!
|
|
*/
|
|
sync();
|
|
sleep(2);
|
|
if(connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_in)) >= 0)
|
|
is_connected = 1;
|
|
}
|
|
#endif
|
|
if(!is_connected) {
|
|
char *hostname = cli_strtok(serverHostNames,
|
|
serverNumber, ":");
|
|
|
|
perror(hostname ? hostname : "connect");
|
|
close(sock);
|
|
if(hostname)
|
|
free(hostname);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* It would be better to use PING, check for PONG then issue the
|
|
* VERSION command, since that would better validate that we're
|
|
* talking to clamd, however clamd closes the session after
|
|
* sending PONG :-(
|
|
* So this code does not really validate that we're talking to clamd
|
|
* Needs a fix to clamd
|
|
* Also version command is verbose: says "clamd / ClamAV version"
|
|
* instead of "clamAV version"
|
|
*/
|
|
cli_dbgmsg("pingServer%d: sending VERSION\n", serverNumber);
|
|
if(send(sock, "VERSION\n", 8, 0) < 8) {
|
|
perror("send");
|
|
close(sock);
|
|
return 0;
|
|
}
|
|
|
|
shutdown(sock, SHUT_WR);
|
|
|
|
nbytes = clamd_recv(sock, buf, sizeof(buf));
|
|
|
|
close(sock);
|
|
|
|
if(nbytes < 0) {
|
|
perror("recv");
|
|
return 0;
|
|
}
|
|
if(nbytes == 0)
|
|
return 0;
|
|
|
|
buf[nbytes] = '\0';
|
|
|
|
/* Remove the trailing new line from the reply */
|
|
if((ptr = strchr(buf, '\n')) != NULL)
|
|
*ptr = '\0';
|
|
|
|
/*
|
|
* No real validation is done here
|
|
*
|
|
* TODO: When connecting to more than one server, give a warning
|
|
* if they're running different versions, or if the virus DBs
|
|
* are out of date (say more than a month old)
|
|
*/
|
|
snprintf(clamav_version, sizeof(clamav_version) - 1,
|
|
"%s\n\tclamav-milter version %s",
|
|
buf, CM_VERSION);
|
|
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Find the best server to connect to. No intelligence to this.
|
|
* It is best to weight the order of the servers from most wanted to least
|
|
* wanted
|
|
*
|
|
* Return value is from 0 - index into sessions array
|
|
*
|
|
* If the load balancing fails return the first server in the list, not
|
|
* an error, to be on the safe side
|
|
*/
|
|
#ifdef SESSION
|
|
static int
|
|
findServer(void)
|
|
{
|
|
unsigned int i, j;
|
|
struct session *session;
|
|
|
|
/*
|
|
* FIXME: Sessions code isn't flexible at handling servers
|
|
* appearing and disappearing, e.g. sessions[n_children].sock == -1
|
|
*/
|
|
i = 0;
|
|
pthread_mutex_lock(&n_children_mutex);
|
|
assert(n_children > 0);
|
|
assert(n_children <= max_children);
|
|
j = n_children - 1;
|
|
pthread_mutex_unlock(&n_children_mutex);
|
|
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
for(; i < max_children; i++) {
|
|
const int sess = (j + i) % max_children;
|
|
|
|
session = &sessions[sess];
|
|
cli_dbgmsg("findServer: try server %d\n", sess);
|
|
if(session->status == CMDSOCKET_FREE) {
|
|
session->status = CMDSOCKET_INUSE;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
return sess;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
|
|
/*
|
|
* No session free - wait until one comes available. Only
|
|
* retries once.
|
|
*/
|
|
if(pthread_cond_broadcast(&watchdog_cond) < 0)
|
|
perror("pthread_cond_broadcast");
|
|
|
|
i = 0;
|
|
session = sessions;
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
for(; i < max_children; i++, session++) {
|
|
cli_dbgmsg("findServer: try server %d\n", i);
|
|
if(session->status == CMDSOCKET_FREE) {
|
|
session->status = CMDSOCKET_INUSE;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
return i;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
|
|
cli_warnmsg(_("No free clamd sessions\n"));
|
|
|
|
return -1; /* none available - must fail */
|
|
}
|
|
#else
|
|
/*
|
|
* Return value is from 0 - index into serverIPs
|
|
*/
|
|
static int
|
|
findServer(void)
|
|
{
|
|
struct sockaddr_in *servers, *server;
|
|
int maxsock, i, j, active;
|
|
int retval;
|
|
pthread_t *tids;
|
|
struct try_server_struct *socks;
|
|
fd_set rfds;
|
|
|
|
assert(tcpSocket != 0);
|
|
assert(numServers > 0);
|
|
|
|
if(numServers == 1)
|
|
return 0;
|
|
|
|
if(active_servers(&active) <= 1)
|
|
return active;
|
|
|
|
servers = (struct sockaddr_in *)cli_calloc(numServers, sizeof(struct sockaddr_in));
|
|
if(servers == NULL)
|
|
return 0;
|
|
socks = (struct try_server_struct *)cli_malloc(numServers * sizeof(struct try_server_struct));
|
|
|
|
if(max_children > 0) {
|
|
assert(n_children > 0);
|
|
assert(n_children <= max_children);
|
|
|
|
/*
|
|
* Don't worry about no lock - it's doesn't matter if it's
|
|
* not really accurate
|
|
*/
|
|
j = n_children - 1; /* look at the next free one */
|
|
if(j < 0)
|
|
j = 0;
|
|
} else
|
|
/*
|
|
* cli_rndnum returns 0..(max-1) - the max argument is not
|
|
* the maximum number you want it to return, it is in fact
|
|
* one *more* than the maximum number you want it to return
|
|
*/
|
|
j = cli_rndnum(numServers);
|
|
|
|
for(i = 0; i < numServers; i++)
|
|
socks[i].sock = -1;
|
|
|
|
tids = cli_malloc(numServers * sizeof(pthread_t));
|
|
|
|
for(i = 0, server = servers; i < numServers; i++, server++) {
|
|
int sock;
|
|
int server_index = (i + j) % numServers;
|
|
|
|
server->sin_family = AF_INET;
|
|
server->sin_port = (in_port_t)htons(tcpSocket);
|
|
server->sin_addr.s_addr = serverIPs[server_index];
|
|
|
|
logg("*findServer: try server %d\n", server_index);
|
|
|
|
sock = socks[i].sock = socket(AF_INET, SOCK_STREAM, 0);
|
|
|
|
if(sock < 0) {
|
|
perror("socket");
|
|
do {
|
|
pthread_join(tids[i], NULL);
|
|
if(socks[i].sock >= 0)
|
|
close(socks[i].sock);
|
|
} while(--i >= 0);
|
|
free(socks);
|
|
free(servers);
|
|
free(tids);
|
|
return 0; /* Use the first server on failure */
|
|
}
|
|
|
|
socks[i].server = server;
|
|
socks[i].server_index = server_index;
|
|
|
|
if(pthread_create(&tids[i], NULL, try_server, &socks[i]) != 0) {
|
|
perror("pthread_create");
|
|
do {
|
|
pthread_join(tids[i], NULL);
|
|
if(socks[i].sock >= 0)
|
|
close(socks[i].sock);
|
|
} while(--i >= 0);
|
|
free(socks);
|
|
free(servers);
|
|
free(tids);
|
|
return 0; /* Use the first server on failure */
|
|
}
|
|
}
|
|
|
|
maxsock = -1;
|
|
FD_ZERO(&rfds);
|
|
|
|
for(i = 0; i < numServers; i++) {
|
|
struct try_server_struct *rc;
|
|
|
|
pthread_join(tids[i], (void **)&rc);
|
|
assert(rc->sock == socks[i].sock);
|
|
if(rc->rc == 0) {
|
|
close(rc->sock);
|
|
socks[i].sock = -1;
|
|
} else {
|
|
shutdown(rc->sock, SHUT_WR);
|
|
FD_SET(rc->sock, &rfds);
|
|
if(rc->sock > maxsock)
|
|
maxsock = rc->sock;
|
|
}
|
|
}
|
|
|
|
free(servers);
|
|
free(tids);
|
|
|
|
if(maxsock == -1) {
|
|
logg(_("^Couldn't establish a connexion to any clamd server\n"));
|
|
retval = 0;
|
|
} else {
|
|
struct timeval tv;
|
|
|
|
tv.tv_sec = readTimeout ? readTimeout : DEFAULT_TIMEOUT;
|
|
tv.tv_usec = 0;
|
|
|
|
retval = select(maxsock + 1, &rfds, NULL, NULL, &tv);
|
|
}
|
|
|
|
if(retval < 0)
|
|
perror("select");
|
|
|
|
for(i = 0; i < numServers; i++)
|
|
if(socks[i].sock >= 0)
|
|
close(socks[i].sock);
|
|
|
|
if(retval == 0) {
|
|
free(socks);
|
|
clamdIsDown();
|
|
return 0;
|
|
} else if(retval < 0) {
|
|
free(socks);
|
|
logg(_("^findServer: select failed (maxsock = %d)\n"), maxsock);
|
|
return 0;
|
|
}
|
|
|
|
for(i = 0; i < numServers; i++)
|
|
if((socks[i].sock >= 0) && (FD_ISSET(socks[i].sock, &rfds))) {
|
|
const int s = (i + j) % numServers;
|
|
|
|
free(socks);
|
|
logg("*findServer: use server %d\n", s);
|
|
return s;
|
|
}
|
|
|
|
free(socks);
|
|
logg(_("^findServer: No response from any server\n"));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* How many servers are up at the moment? If a server is marked as down,
|
|
* don't keep on flooding it with requests to see if it's now back up
|
|
* If only one server is active, let the caller know
|
|
*/
|
|
static int
|
|
active_servers(int *active)
|
|
{
|
|
int server, count;
|
|
time_t now = (time_t)0;
|
|
|
|
for(count = server = 0; server < numServers; server++)
|
|
if(last_failed_pings[server] == (time_t)0) {
|
|
*active = server;
|
|
count++;
|
|
} else {
|
|
if(now == (time_t)0)
|
|
time(&now);
|
|
if(now - last_failed_pings[server] >= RETRY_SECS)
|
|
/* Try this server again next time */
|
|
last_failed_pings[server] = (time_t)0;
|
|
}
|
|
|
|
if(count != 1)
|
|
*active = 0;
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* Connecting to remote servers can take some time, so let's connect to
|
|
* them in parallel. This routine is started as a thread
|
|
*/
|
|
static void *
|
|
try_server(void *var)
|
|
{
|
|
struct try_server_struct *s = (struct try_server_struct *)var;
|
|
int sock = s->sock;
|
|
struct sockaddr *server = (struct sockaddr *)s->server;
|
|
int server_index = s->server_index;
|
|
|
|
if(last_failed_pings[server_index]) {
|
|
s->rc = 0;
|
|
return var;
|
|
}
|
|
|
|
logg("*try_server: sock %d\n", sock);
|
|
|
|
if((connect(sock, server, sizeof(struct sockaddr)) < 0) ||
|
|
(send(sock, "PING\n", 5, 0) < 5)) {
|
|
time(&last_failed_pings[server_index]);
|
|
s->rc = 0;
|
|
} else
|
|
s->rc = 1;
|
|
|
|
if(s->rc == 0) {
|
|
#ifdef MAXHOSTNAMELEN
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
|
|
cli_strtokbuf(serverHostNames, server_index, ":", hostname);
|
|
if(strcmp(hostname, "127.0.0.1") == 0)
|
|
gethostname(hostname, sizeof(hostname));
|
|
#else
|
|
char *hostname = cli_strtok(serverHostNames, server_index, ":");
|
|
#endif
|
|
perror(hostname);
|
|
logg(_("^Check clamd server %s - it may be down\n"), hostname);
|
|
#ifndef MAXHOSTNAMELEN
|
|
free(hostname);
|
|
#endif
|
|
broadcast(_("Check clamd server - it may be down\n"));
|
|
}
|
|
|
|
return var;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Sendmail wants to establish a connexion to us
|
|
*/
|
|
static sfsistat
|
|
clamfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
|
|
{
|
|
#if defined(HAVE_INET_NTOP) || defined(WITH_TCPWRAP)
|
|
char ip[INET6_ADDRSTRLEN];
|
|
#endif
|
|
int t;
|
|
const char *remoteIP;
|
|
struct privdata *privdata;
|
|
|
|
if(quitting)
|
|
return cl_error;
|
|
|
|
if(ctx == NULL) {
|
|
logg(_("!clamfi_connect: ctx is null"));
|
|
return cl_error;
|
|
}
|
|
if(hostname == NULL) {
|
|
logg(_("!clamfi_connect: hostname is null"));
|
|
return cl_error;
|
|
}
|
|
if(smfi_getpriv(ctx) != NULL) {
|
|
/* More than one connexion command, "can't happen" */
|
|
cli_warnmsg("clamfi_connect: called more than once\n");
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
#ifdef AF_INET6
|
|
if((hostaddr == NULL) ||
|
|
((hostaddr->sa_family == AF_INET) && (&(((struct sockaddr_in *)(hostaddr))->sin_addr) == NULL)) ||
|
|
((hostaddr->sa_family == AF_INET6) && (&(((struct sockaddr_in6 *)(hostaddr))->sin6_addr) == NULL)))
|
|
#else
|
|
if((hostaddr == NULL) || (&(((struct sockaddr_in *)(hostaddr))->sin_addr) == NULL))
|
|
#endif
|
|
/*
|
|
* According to the sendmail API hostaddr is NULL if
|
|
* "the type is not supported in the current version". What
|
|
* the documentation doesn't say is the type of what.
|
|
*
|
|
* Possibly the input is not a TCP/IP socket e.g. stdin?
|
|
*/
|
|
remoteIP = "127.0.0.1";
|
|
else {
|
|
#ifdef HAVE_INET_NTOP
|
|
switch(hostaddr->sa_family) {
|
|
case AF_INET:
|
|
remoteIP = (char *)inet_ntop(AF_INET, &((struct sockaddr_in *)(hostaddr))->sin_addr, ip, sizeof(ip));
|
|
break;
|
|
#ifdef AF_INET6
|
|
case AF_INET6:
|
|
remoteIP = (char *)inet_ntop(AF_INET6, &((struct sockaddr_in6 *)(hostaddr))->sin6_addr, ip, sizeof(ip));
|
|
break;
|
|
#endif
|
|
default:
|
|
logg(_("clamfi_connect: Unexpected sa_family %d\n"),
|
|
hostaddr->sa_family);
|
|
return cl_error;
|
|
}
|
|
|
|
#else
|
|
remoteIP = inet_ntoa(((struct sockaddr_in *)(hostaddr))->sin_addr);
|
|
#endif
|
|
|
|
if(remoteIP == NULL) {
|
|
logg(_("clamfi_connect: remoteIP is null"));
|
|
return cl_error;
|
|
}
|
|
}
|
|
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 4) {
|
|
if(hostname[0] == '[')
|
|
logg(_("clamfi_connect: connexion from %s"), remoteIP);
|
|
else
|
|
logg(_("clamfi_connect: connexion from %s [%s]"), hostname, remoteIP);
|
|
}
|
|
#endif
|
|
|
|
#ifdef WITH_TCPWRAP
|
|
/*
|
|
* Support /etc/hosts.allow and /etc/hosts.deny
|
|
*/
|
|
if(strncasecmp(port, "inet:", 5) == 0) {
|
|
const char *hostmail;
|
|
struct hostent hostent;
|
|
char buf[BUFSIZ];
|
|
static pthread_mutex_t wrap_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
/*
|
|
* Using TCP/IP for the sendmail->clamav-milter connexion
|
|
*/
|
|
if(((hostmail = smfi_getsymval(ctx, "{if_name}")) == NULL) &&
|
|
((hostmail = smfi_getsymval(ctx, "j")) == NULL)) {
|
|
logg(_("Can't get sendmail hostname"));
|
|
return cl_error;
|
|
}
|
|
/*
|
|
* Use hostmail for error statements, not hostname, suggestion
|
|
* by Yar Tikhiy <yar@comp.chem.msu.su>
|
|
*/
|
|
if(r_gethostbyname(hostmail, &hostent, buf, sizeof(buf)) != 0) {
|
|
logg(_("^Access Denied: Host Unknown (%s)"), hostmail);
|
|
if(hostmail[0] == '[')
|
|
/*
|
|
* A case could be made that it's not clamAV's
|
|
* job to check a system's DNS configuration
|
|
* and let this message through. However I am
|
|
* just too worried about any knock on effects
|
|
* to do that...
|
|
*/
|
|
cli_warnmsg(_("Can't find entry for IP address %s in DNS - check your DNS setting\n"),
|
|
hostmail);
|
|
return cl_error;
|
|
}
|
|
|
|
#ifdef HAVE_INET_NTOP
|
|
if(hostent.h_addr &&
|
|
(inet_ntop(AF_INET, (struct in_addr *)hostent.h_addr, ip, sizeof(ip)) == NULL)) {
|
|
perror(hostent.h_name);
|
|
/*strcpy(ip, (char *)inet_ntoa(*(struct in_addr *)hostent.h_addr));*/
|
|
logg(_("^Access Denied: Can't get IP address for (%s)"), hostent.h_name);
|
|
return cl_error;
|
|
}
|
|
#else
|
|
strncpy(ip, (char *)inet_ntoa(*(struct in_addr *)hostent.h_addr), sizeof(ip));
|
|
#endif
|
|
|
|
/*
|
|
* Ask is this is a allowed name or IP number
|
|
*
|
|
* hosts_ctl uses strtok so it is not thread safe, see
|
|
* hosts_access(3)
|
|
*/
|
|
pthread_mutex_lock(&wrap_mutex);
|
|
if(!hosts_ctl(progname, hostent.h_name, ip, STRING_UNKNOWN)) {
|
|
pthread_mutex_unlock(&wrap_mutex);
|
|
logg(_("^Access Denied for %s[%s]"), hostent.h_name, ip);
|
|
return SMFIS_TEMPFAIL;
|
|
}
|
|
pthread_mutex_unlock(&wrap_mutex);
|
|
}
|
|
#endif /*WITH_TCPWRAP*/
|
|
|
|
if(fflag)
|
|
/*
|
|
* Patch from "Richard G. Roberto" <rgr@dedlegend.com>
|
|
* Always scan whereever the message is from
|
|
*/
|
|
return SMFIS_CONTINUE;
|
|
|
|
if(!oflag)
|
|
if(strcmp(remoteIP, "127.0.0.1") == 0) {
|
|
logg(_("*clamfi_connect: not scanning outgoing messages"));
|
|
return SMFIS_ACCEPT;
|
|
}
|
|
|
|
if((!lflag) && isLocal(remoteIP)) {
|
|
#ifdef CL_DEBUG
|
|
logg(_("*clamfi_connect: not scanning local messages\n"));
|
|
#endif
|
|
return SMFIS_ACCEPT;
|
|
}
|
|
|
|
#if defined(HAVE_INET_NTOP) || defined(WITH_TCPWRAP)
|
|
if(detect_forged_local_address && !isLocal(ip)) {
|
|
#else
|
|
if(detect_forged_local_address && !isLocal(remoteIP)) {
|
|
#endif
|
|
char me[MAXHOSTNAMELEN + 1];
|
|
|
|
if(gethostname(me, sizeof(me) - 1) < 0) {
|
|
logg(_("^clamfi_connect: gethostname failed"));
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
logg("*me '%s' hostname '%s'\n", me, hostname);
|
|
if(strcasecmp(hostname, me) == 0) {
|
|
logg(_("Rejected connexion falsely claiming to be from here\n"));
|
|
smfi_setreply(ctx, "550", "5.7.1", _("You have claimed to be me, but you are not"));
|
|
broadcast(_("Forged local address detected"));
|
|
return SMFIS_REJECT;
|
|
}
|
|
}
|
|
if(isBlacklisted(remoteIP)) {
|
|
char mess[128];
|
|
|
|
/*
|
|
* TODO: Option to greylist rather than blacklist, by sending
|
|
* a try again code
|
|
* TODO: state *which* virus
|
|
* TODO: add optional list of IP addresses that won't be
|
|
* blacklisted
|
|
*/
|
|
logg("Rejected connexion from blacklisted IP %s\n", remoteIP);
|
|
|
|
snprintf(mess, sizeof(mess), _("%s is blacklisted because your machine is infected with a virus"), remoteIP);
|
|
smfi_setreply(ctx, "550", "5.7.1", mess);
|
|
broadcast(_("Blacklisted IP detected"));
|
|
|
|
/*
|
|
* Keep them blacklisted
|
|
*/
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
(void)tableUpdate(blacklist, remoteIP, (int)time((time_t *)0));
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
|
|
return SMFIS_REJECT;
|
|
}
|
|
|
|
if(blacklist_time == 0)
|
|
return SMFIS_CONTINUE; /* allocate privdata per message */
|
|
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
t = tableFind(blacklist, remoteIP);
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
|
|
if(t == 0)
|
|
return SMFIS_CONTINUE; /* this IP will never be blacklisted */
|
|
|
|
privdata = (struct privdata *)cli_calloc(1, sizeof(struct privdata));
|
|
if(privdata == NULL)
|
|
return cl_error;
|
|
|
|
#ifdef SESSION
|
|
privdata->dataSocket = -1;
|
|
#else
|
|
privdata->dataSocket = privdata->cmdSocket = -1;
|
|
#endif
|
|
|
|
if(smfi_setpriv(ctx, privdata) == MI_SUCCESS) {
|
|
strcpy(privdata->ip, remoteIP);
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
free(privdata);
|
|
|
|
return cl_error;
|
|
}
|
|
|
|
/*
|
|
* Since sendmail requires that MAIL FROM is called before RCPT TO, it is
|
|
* safe to assume that this routine is called first, so the n_children
|
|
* handler is put here
|
|
*/
|
|
static sfsistat
|
|
clamfi_envfrom(SMFICTX *ctx, char **argv)
|
|
{
|
|
struct privdata *privdata;
|
|
const char *mailaddr = argv[0];
|
|
|
|
logg("*clamfi_envfrom: %s\n", argv[0]);
|
|
|
|
if(isWhitelisted(argv[0], 0)) {
|
|
logg(_("*clamfi_envfrom: ignoring whitelisted message"));
|
|
return SMFIS_ACCEPT;
|
|
}
|
|
|
|
if(strcmp(argv[0], "<>") == 0) {
|
|
mailaddr = smfi_getsymval(ctx, "{mail_addr}");
|
|
if(mailaddr == NULL)
|
|
mailaddr = smfi_getsymval(ctx, "_");
|
|
|
|
if(mailaddr && *mailaddr)
|
|
cli_dbgmsg("Message from \"%s\" has no from field\n", mailaddr);
|
|
else {
|
|
#if 0
|
|
if(use_syslog)
|
|
syslog(LOG_NOTICE, _("Rejected email with empty from field"));
|
|
smfi_setreply(ctx, "554", "5.7.1", _("You have not said who the email is from"));
|
|
broadcast(_("Reject email with empty from field"));
|
|
clamfi_cleanup(ctx);
|
|
return SMFIS_REJECT;
|
|
#endif
|
|
mailaddr = "<>";
|
|
}
|
|
}
|
|
privdata = smfi_getpriv(ctx);
|
|
|
|
if(privdata == NULL) {
|
|
privdata = (struct privdata *)cli_calloc(1, sizeof(struct privdata));
|
|
if(privdata == NULL)
|
|
return cl_error;
|
|
if(smfi_setpriv(ctx, privdata) != MI_SUCCESS) {
|
|
free(privdata);
|
|
return cl_error;
|
|
}
|
|
if(!increment_connexions()) {
|
|
smfi_setreply(ctx, "451", "4.3.2", _("AV system temporarily overloaded - please try later"));
|
|
free(privdata);
|
|
smfi_setpriv(ctx, NULL);
|
|
return SMFIS_TEMPFAIL;
|
|
}
|
|
} else {
|
|
/* More than one message on this connexion */
|
|
char ip[INET6_ADDRSTRLEN];
|
|
|
|
strcpy(ip, privdata->ip);
|
|
if(isBlacklisted(ip)) {
|
|
char mess[80 + INET6_ADDRSTRLEN];
|
|
|
|
logg("Rejected email from blacklisted IP %s\n", ip);
|
|
|
|
/*
|
|
* TODO: Option to greylist rather than blacklist, by
|
|
* sending a try again code
|
|
* TODO: state *which* virus
|
|
*/
|
|
sprintf(mess, "Your IP (%s) is blacklisted because your machine is infected with a virus", ip);
|
|
smfi_setreply(ctx, "550", "5.7.1", mess);
|
|
broadcast(_("Blacklisted IP detected"));
|
|
|
|
/*
|
|
* Keep them blacklisted
|
|
*/
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
(void)tableUpdate(blacklist, ip, (int)time((time_t *)0));
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
|
|
return SMFIS_REJECT;
|
|
}
|
|
clamfi_free(privdata, 1);
|
|
strcpy(privdata->ip, ip);
|
|
}
|
|
|
|
#ifdef SESSION
|
|
privdata->dataSocket = -1;
|
|
#else
|
|
privdata->dataSocket = privdata->cmdSocket = -1;
|
|
#endif
|
|
|
|
/*
|
|
* Rejection is via 550 until DATA is received. We know that
|
|
* DATA has been sent when either we get a header or the end of
|
|
* header statement
|
|
*/
|
|
privdata->rejectCode = "550";
|
|
|
|
privdata->from = cli_strdup(mailaddr);
|
|
|
|
if(hflag)
|
|
privdata->headers = header_list_new();
|
|
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
#ifdef CL_DEBUG
|
|
static sfsistat
|
|
clamfi_helo(SMFICTX *ctx, char *helostring)
|
|
{
|
|
logg("HELO '%s'\n", helostring);
|
|
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
#endif
|
|
|
|
static sfsistat
|
|
clamfi_envrcpt(SMFICTX *ctx, char **argv)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
const char *to, *ptr;
|
|
|
|
logg("*clamfi_envrcpt: %s\n", argv[0]);
|
|
|
|
if(privdata->to == NULL) {
|
|
privdata->to = cli_malloc(sizeof(char *) * 2);
|
|
|
|
assert(privdata->numTo == 0);
|
|
} else
|
|
privdata->to = cli_realloc(privdata->to, sizeof(char *) * (privdata->numTo + 2));
|
|
|
|
if(privdata->to == NULL)
|
|
return cl_error;
|
|
|
|
to = smfi_getsymval(ctx, "{rcpt_addr}");
|
|
if(to == NULL)
|
|
to = argv[0];
|
|
|
|
for(ptr = to; *ptr; ptr++)
|
|
if(strchr("|;", *ptr) != NULL) {
|
|
smfi_setreply(ctx, "554", "5.7.1", _("Suspicious recipient address blocked"));
|
|
logg("^Suspicious recipient address blocked: '%s'\n", to);
|
|
privdata->to[privdata->numTo] = NULL;
|
|
if(blacklist_time && privdata->ip[0]) {
|
|
logg(_("Will blacklist %s for %d seconds because of cracking attempt\n"),
|
|
privdata->ip, blacklist_time);
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
(void)tableUpdate(blacklist, privdata->ip,
|
|
(int)time((time_t *)0));
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
}
|
|
/*
|
|
* REJECT rejects this recipient, not the entire email
|
|
*/
|
|
return SMFIS_REJECT;
|
|
}
|
|
|
|
privdata->to[privdata->numTo] = cli_strdup(to);
|
|
privdata->to[++privdata->numTo] = NULL;
|
|
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
static sfsistat
|
|
clamfi_header(SMFICTX *ctx, char *headerf, char *headerv)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 9)
|
|
logg("*clamfi_header: %s: %s\n", headerf, headerv);
|
|
else
|
|
logg("*clamfi_header: %s\n", headerf);
|
|
#else
|
|
logg("*clamfi_header: %s\n", headerf);
|
|
#endif
|
|
|
|
/*
|
|
* The DATA instruction from SMTP (RFC2821) must have been sent
|
|
*/
|
|
privdata->rejectCode = "554";
|
|
|
|
if(hflag)
|
|
header_list_add(privdata->headers, headerf, headerv);
|
|
else if((strcasecmp(headerf, "Received") == 0) &&
|
|
(strncasecmp(headerv, "from ", 5) == 0) &&
|
|
(strstr(headerv, "localhost") != 0)) {
|
|
if(privdata->received)
|
|
free(privdata->received);
|
|
privdata->received = cli_strdup(headerv);
|
|
}
|
|
|
|
if((strcasecmp(headerf, "Message-ID") == 0) &&
|
|
(strncasecmp(headerv, "<MDAEMON", 8) == 0))
|
|
privdata->discard = 1;
|
|
else if(strcasecmp(headerf, "Subject") == 0) {
|
|
if(privdata->subject)
|
|
free(privdata->subject);
|
|
if(headerv)
|
|
privdata->subject = cli_strdup(headerv);
|
|
} else if(strcasecmp(headerf, "X-Virus-Status") == 0)
|
|
privdata->statusCount++;
|
|
else if(strcasecmp(headerf, "Sender") == 0) {
|
|
if(privdata->sender)
|
|
free(privdata->sender);
|
|
if(headerv)
|
|
privdata->sender = cli_strdup(headerv);
|
|
}
|
|
|
|
if(!useful_header(headerf)) {
|
|
logg("*Discarded the header\n");
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
if(privdata->dataSocket == -1)
|
|
/*
|
|
* First header - make connexion with clamd
|
|
*/
|
|
if(!connect2clamd(privdata)) {
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
|
|
if(clamfi_send(privdata, 0, "%s: %s\n", headerf, headerv) <= 0) {
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* At this point DATA will have been received, so we really ought to
|
|
* send 554 back not 550
|
|
*/
|
|
static sfsistat
|
|
clamfi_eoh(SMFICTX *ctx)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
char **to;
|
|
|
|
logg(_("*clamfi_eoh\n"));
|
|
|
|
/*
|
|
* The DATA instruction from SMTP (RFC2821) must have been sent
|
|
*/
|
|
privdata->rejectCode = "554";
|
|
|
|
if(privdata->dataSocket == -1)
|
|
/*
|
|
* No headers - make connexion with clamd
|
|
*/
|
|
if(!connect2clamd(privdata)) {
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
|
|
#if 0
|
|
/* Mailing lists often say our own posts are from us */
|
|
if(detect_forged_local_address && privdata->from &&
|
|
(!privdata->sender) && !isWhitelisted(privdata->from, 1)) {
|
|
char me[MAXHOSTNAMELEN + 1];
|
|
const char *ptr;
|
|
|
|
if(gethostname(me, sizeof(me) - 1) < 0) {
|
|
if(use_syslog)
|
|
syslog(LOG_WARNING, _("clamfi_eoh: gethostname failed"));
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
ptr = strstr(privdata->from, me);
|
|
if(ptr && (ptr != privdata->from) && (*--ptr == '@')) {
|
|
if(use_syslog)
|
|
syslog(LOG_NOTICE, _("Rejected email falsely claiming to be from %s"), privdata->from);
|
|
smfi_setreply(ctx, "554", "5.7.1", _("You have claimed to be from me, but you are not"));
|
|
broadcast(_("Forged local address detected"));
|
|
clamfi_cleanup(ctx);
|
|
return SMFIS_REJECT;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if(clamfi_send(privdata, 1, "\n") != 1) {
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
|
|
if(black_hole_mode) {
|
|
sfsistat rc = black_hole(privdata);
|
|
|
|
if(rc != SMFIS_CONTINUE) {
|
|
clamfi_cleanup(ctx);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* See if the e-mail is only going to members of the list
|
|
* of users we don't scan for. If it is, don't scan, otherwise
|
|
* scan
|
|
*
|
|
* scan = false
|
|
* FORALL recipients
|
|
* IF receipient NOT MEMBER OF white address list
|
|
* THEN
|
|
* scan = true
|
|
* FI
|
|
* ENDFOR
|
|
*/
|
|
for(to = privdata->to; *to; to++)
|
|
if(!isWhitelisted(*to, 1))
|
|
/*
|
|
* This recipient is not on the whitelist,
|
|
* no need to check any further
|
|
*/
|
|
return SMFIS_CONTINUE;
|
|
|
|
/*
|
|
* Didn't find a recipient who is not on the white list, so all
|
|
* must be on the white list, so just accept the e-mail
|
|
*/
|
|
logg(_("*clamfi_enveoh: ignoring whitelisted message"));
|
|
clamfi_cleanup(ctx);
|
|
|
|
return SMFIS_ACCEPT;
|
|
}
|
|
|
|
static sfsistat
|
|
clamfi_body(SMFICTX *ctx, u_char *bodyp, size_t len)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
int nbytes;
|
|
|
|
logg(_("*clamfi_envbody: %lu bytes"), (unsigned long)len);
|
|
|
|
if(len == 0) /* unlikely */
|
|
return SMFIS_CONTINUE;
|
|
|
|
/*
|
|
* TODO:
|
|
* If not in external mode, call cli_scanbuff here, at least for
|
|
* the first block
|
|
*/
|
|
/*
|
|
* Lines starting with From are changed to >From, to
|
|
* avoid FP matches in the scanning code, which will speed it up
|
|
*/
|
|
if((len >= 6) && cli_memstr((char *)bodyp, len, "\nFrom ", 6)) {
|
|
const char *ptr = (const char *)bodyp;
|
|
int left = len;
|
|
|
|
nbytes = 0;
|
|
|
|
/*
|
|
* FIXME: sending one byte at a time down a socket is
|
|
* inefficient
|
|
*/
|
|
do {
|
|
if(*ptr == '\n') {
|
|
/*
|
|
* FIXME: doesn't work if the \nFrom straddles
|
|
* multiple calls to clamfi_body
|
|
*/
|
|
if(strncmp(ptr, "\nFrom ", 6) == 0) {
|
|
nbytes += clamfi_send(privdata, 7, "\n>From ");
|
|
ptr += 6;
|
|
left -= 6;
|
|
} else {
|
|
nbytes += clamfi_send(privdata, 1, "\n");
|
|
ptr++;
|
|
left--;
|
|
}
|
|
} else {
|
|
nbytes += clamfi_send(privdata, 1, ptr++);
|
|
left--;
|
|
}
|
|
if(left < 6) {
|
|
nbytes += clamfi_send(privdata, left, ptr);
|
|
break;
|
|
}
|
|
} while(left > 0);
|
|
} else
|
|
nbytes = clamfi_send(privdata, len, (char *)bodyp);
|
|
|
|
if(streamMaxLength > 0L) {
|
|
if(privdata->numBytes > streamMaxLength) {
|
|
const char *sendmailId = smfi_getsymval(ctx, "i");
|
|
|
|
if(sendmailId == NULL)
|
|
sendmailId = "Unknown";
|
|
logg(_("%s: Message more than StreamMaxLength (%ld) bytes - not scanned\n"),
|
|
sendmailId, streamMaxLength);
|
|
if(!nflag)
|
|
smfi_addheader(ctx, "X-Virus-Status", _("Not Scanned - StreamMaxLength exceeded"));
|
|
|
|
return SMFIS_ACCEPT; /* clamfi_close will be called */
|
|
}
|
|
}
|
|
if(nbytes < (int)len) {
|
|
clamfi_cleanup(ctx); /* not needed, but just to be safe */
|
|
return cl_error;
|
|
}
|
|
if(Sflag) {
|
|
if(privdata->body) {
|
|
assert(privdata->bodyLen > 0);
|
|
privdata->body = cli_realloc(privdata->body, privdata->bodyLen + len);
|
|
memcpy(&privdata->body[privdata->bodyLen], bodyp, len);
|
|
privdata->bodyLen += len;
|
|
} else {
|
|
assert(privdata->bodyLen == 0);
|
|
privdata->body = cli_malloc(len);
|
|
memcpy(privdata->body, bodyp, len);
|
|
privdata->bodyLen = len;
|
|
}
|
|
}
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
static sfsistat
|
|
clamfi_eom(SMFICTX *ctx)
|
|
{
|
|
int rc = SMFIS_CONTINUE;
|
|
char *ptr;
|
|
const char *sendmailId;
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
char mess[128];
|
|
#ifdef SESSION
|
|
struct session *session;
|
|
#endif
|
|
|
|
logg("*clamfi_eom\n");
|
|
|
|
#ifdef CL_DEBUG
|
|
assert(privdata != NULL);
|
|
#ifndef SESSION
|
|
assert((privdata->cmdSocket >= 0) || (privdata->filename != NULL));
|
|
assert(!((privdata->cmdSocket >= 0) && (privdata->filename != NULL)));
|
|
#endif
|
|
#endif
|
|
|
|
if(external) {
|
|
shutdown(privdata->dataSocket, SHUT_WR); /* bug 487 */
|
|
close(privdata->dataSocket);
|
|
privdata->dataSocket = -1;
|
|
}
|
|
|
|
if(!nflag) {
|
|
/*
|
|
* remove any existing claims that it's virus free so that
|
|
* downstream checkers aren't fooled by a carefully crafted
|
|
* virus.
|
|
*/
|
|
int i;
|
|
|
|
for(i = privdata->statusCount; i > 0; --i)
|
|
if(smfi_chgheader(ctx, "X-Virus-Status", i, NULL) == MI_FAILURE)
|
|
logg(_("^Failed to delete X-Virus-Status header %d\n"), i);
|
|
}
|
|
|
|
if(!external) {
|
|
const char *virname;
|
|
|
|
pthread_mutex_lock(&root_mutex);
|
|
privdata->root = cl_dup(root);
|
|
pthread_mutex_unlock(&root_mutex);
|
|
if(privdata->root == NULL) {
|
|
logg("!privdata->root == NULL\n");
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
switch(cl_scanfile(privdata->filename, &virname, NULL, privdata->root, &limits, options)) {
|
|
case CL_CLEAN:
|
|
if(logok)
|
|
logg("#%s: OK\n", privdata->filename);
|
|
strcpy(mess, "OK");
|
|
break;
|
|
case CL_VIRUS:
|
|
snprintf(mess, sizeof(mess), "%s: %s FOUND", privdata->filename, virname);
|
|
logg("#%s\n", mess);
|
|
break;
|
|
default:
|
|
snprintf(mess, sizeof(mess), "%s: %s ERROR", privdata->filename, cl_strerror(rc));
|
|
logg("!%s\n", mess);
|
|
break;
|
|
}
|
|
cl_free(privdata->root);
|
|
privdata->root = NULL;
|
|
|
|
#ifdef SESSION
|
|
session = NULL;
|
|
#endif
|
|
} else if(privdata->filename) {
|
|
char cmdbuf[1024];
|
|
/*
|
|
* Create socket to talk to clamd.
|
|
*/
|
|
#ifndef SESSION
|
|
struct sockaddr_un server;
|
|
#endif
|
|
long nbytes;
|
|
|
|
snprintf(cmdbuf, sizeof(cmdbuf) - 1, "SCAN %s", privdata->filename);
|
|
cli_dbgmsg("clamfi_eom: SCAN %s\n", privdata->filename);
|
|
|
|
nbytes = (int)strlen(cmdbuf);
|
|
|
|
#ifdef SESSION
|
|
session = sessions;
|
|
if(send(session->sock, cmdbuf, nbytes, 0) < nbytes) {
|
|
perror("send");
|
|
clamfi_cleanup(ctx);
|
|
logg(_("failed to send SCAN %s command to clamd\n"), privdata->filename);
|
|
return cl_error;
|
|
}
|
|
#else
|
|
if((privdata->cmdSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
|
|
perror("socket");
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
memset((char *)&server, 0, sizeof(struct sockaddr_un));
|
|
server.sun_family = AF_UNIX;
|
|
strncpy(server.sun_path, localSocket, sizeof(server.sun_path));
|
|
|
|
if(connect(privdata->cmdSocket, (struct sockaddr *)&server, sizeof(struct sockaddr_un)) < 0) {
|
|
perror(localSocket);
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
if(send(privdata->cmdSocket, cmdbuf, nbytes, 0) < nbytes) {
|
|
perror("send");
|
|
clamfi_cleanup(ctx);
|
|
logg(_("failed to send SCAN command to clamd\n"));
|
|
return cl_error;
|
|
}
|
|
|
|
shutdown(privdata->cmdSocket, SHUT_WR);
|
|
#endif
|
|
}
|
|
#ifdef SESSION
|
|
else
|
|
session = &sessions[privdata->serverNumber];
|
|
#endif
|
|
|
|
if(external) {
|
|
int nbytes;
|
|
#ifdef SESSION
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 4)
|
|
cli_dbgmsg(_("Waiting to read status from fd %d\n"),
|
|
session->sock);
|
|
#endif
|
|
nbytes = clamd_recv(session->sock, mess, sizeof(mess) - 1);
|
|
#else
|
|
nbytes = clamd_recv(privdata->cmdSocket, mess, sizeof(mess) - 1);
|
|
#endif
|
|
if(nbytes > 0) {
|
|
mess[nbytes] = '\0';
|
|
if((ptr = strchr(mess, '\n')) != NULL)
|
|
*ptr = '\0';
|
|
|
|
logg(_("*clamfi_eom: read %s\n"), mess);
|
|
} else {
|
|
#ifdef MAXHOSTNAMELEN
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
|
|
cli_strtokbuf(serverHostNames, privdata->serverNumber, ":", hostname);
|
|
if(strcmp(hostname, "127.0.0.1") == 0)
|
|
gethostname(hostname, sizeof(hostname));
|
|
#else
|
|
char *hostname = cli_strtok(serverHostNames, privdata->serverNumber, ":");
|
|
#endif
|
|
/*
|
|
* TODO: if more than one host has been specified, try
|
|
* another one - setting cl_error to SMFIS_TEMPFAIL
|
|
* helps by forcing a retry
|
|
*/
|
|
clamfi_cleanup(ctx);
|
|
|
|
logg(_("clamfi_eom: read nothing from clamd on %s\n"), hostname);
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
session->status = CMDSOCKET_DOWN;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
#endif
|
|
return cl_error;
|
|
}
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
if(session->status == CMDSOCKET_INUSE)
|
|
session->status = CMDSOCKET_FREE;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
#else
|
|
close(privdata->cmdSocket);
|
|
privdata->cmdSocket = -1;
|
|
#endif
|
|
}
|
|
|
|
sendmailId = smfi_getsymval(ctx, "i");
|
|
if(sendmailId == NULL)
|
|
sendmailId = "Unknown";
|
|
|
|
if(!nflag) {
|
|
char buf[1024];
|
|
|
|
/*
|
|
* Include the hostname where the scan took place
|
|
*/
|
|
if(localSocket || !external) {
|
|
#ifdef MAXHOSTNAMELEN
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
#else
|
|
char hostname[65];
|
|
#endif
|
|
|
|
if(gethostname(hostname, sizeof(hostname)) < 0) {
|
|
const char *j = smfi_getsymval(ctx, "{j}");
|
|
|
|
if(j)
|
|
strncpy(hostname, j,
|
|
sizeof(hostname) - 1);
|
|
else
|
|
strcpy(hostname, _("Error determining host"));
|
|
} else if(strchr(hostname, '.') == NULL) {
|
|
/*
|
|
* Determine fully qualified name
|
|
*/
|
|
struct hostent hostent;
|
|
|
|
if((r_gethostbyname(hostname, &hostent, buf, sizeof(buf)) == 0) &&
|
|
hostent.h_name)
|
|
strncpy(hostname, hostent.h_name, sizeof(hostname));
|
|
}
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&version_mutex);
|
|
snprintf(buf, sizeof(buf) - 1, "%s on %s",
|
|
clamav_versions[privdata->serverNumber], hostname);
|
|
pthread_mutex_unlock(&version_mutex);
|
|
#else
|
|
snprintf(buf, sizeof(buf) - 1, "%s on %s",
|
|
clamav_version, hostname);
|
|
#endif
|
|
} else {
|
|
#ifdef MAXHOSTNAMELEN
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
|
|
if(cli_strtokbuf(serverHostNames, privdata->serverNumber, ":", hostname)) {
|
|
if(strcmp(hostname, "127.0.0.1") == 0)
|
|
gethostname(hostname, sizeof(hostname));
|
|
#else
|
|
char *hostname = cli_strtok(serverHostNames, privdata->serverNumber, ":");
|
|
if(hostname) {
|
|
#endif
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&version_mutex);
|
|
snprintf(buf, sizeof(buf) - 1, "%s on %s",
|
|
clamav_versions[privdata->serverNumber], hostname);
|
|
pthread_mutex_unlock(&version_mutex);
|
|
#else
|
|
snprintf(buf, sizeof(buf) - 1, "%s on %s",
|
|
clamav_version, hostname);
|
|
#endif
|
|
#ifndef MAXHOSTNAMELEN
|
|
free(hostname);
|
|
#endif
|
|
} else
|
|
/* sanity check failed - should issue warning */
|
|
strcpy(buf, _("Error determining host"));
|
|
}
|
|
smfi_addheader(ctx, "X-Virus-Scanned", buf);
|
|
}
|
|
|
|
/*
|
|
* TODO: it would be useful to add a header if mbox.c/FOLLOWURLS was
|
|
* exceeded
|
|
*/
|
|
#ifdef HAVE_RESOLV_H
|
|
if((strstr(mess, "FOUND") != NULL) && (strstr(mess, "Phishing") != NULL)) {
|
|
table_t *prevhosts = tableCreate();
|
|
|
|
if(spf(privdata, prevhosts)) {
|
|
logg(_("%s: ignoring phish false positive from %s received from %s\n"),
|
|
sendmailId, privdata->from, privdata->ip);
|
|
strcpy(mess, "OK");
|
|
}
|
|
tableDestroy(prevhosts);
|
|
}
|
|
#endif
|
|
if(strstr(mess, "ERROR") != NULL) {
|
|
if(strstr(mess, "Size limit reached") != NULL) {
|
|
/*
|
|
* Clamd has stopped on StreamMaxLength before us
|
|
*/
|
|
logg(_("%s: Message more than StreamMaxLength (%ld) bytes - not scanned"),
|
|
sendmailId, streamMaxLength);
|
|
if(!nflag)
|
|
smfi_addheader(ctx, "X-Virus-Status", _("Not Scanned - StreamMaxLength exceeded"));
|
|
clamfi_cleanup(ctx); /* not needed, but just to be safe */
|
|
return SMFIS_ACCEPT;
|
|
}
|
|
if(!nflag)
|
|
smfi_addheader(ctx, "X-Virus-Status", _("Not Scanned"));
|
|
|
|
logg("!%s: %s\n", sendmailId, mess);
|
|
rc = cl_error;
|
|
} else if((ptr = strstr(mess, "FOUND")) != NULL) {
|
|
/*
|
|
* FIXME: This will give false positives if the
|
|
* word "FOUND" is in the email, e.g. the
|
|
* quarantine directory is /tmp/VIRUSES-FOUND
|
|
*/
|
|
int i;
|
|
char **to, *virusname, *err;
|
|
char reject[1024];
|
|
|
|
/*
|
|
* Remove the "FOUND" word, and the space before it
|
|
*/
|
|
*--ptr = '\0';
|
|
|
|
/* skip over 'stream/filename: ' at the start */
|
|
if((virusname = strchr(mess, ':')) != NULL)
|
|
virusname = &virusname[2];
|
|
else
|
|
virusname = mess;
|
|
|
|
if(!nflag) {
|
|
char buf[129];
|
|
|
|
snprintf(buf, sizeof(buf) - 1, "%s %s", _("Infected with"), virusname);
|
|
smfi_addheader(ctx, "X-Virus-Status", buf);
|
|
}
|
|
|
|
if(quarantine_dir)
|
|
qfile(privdata, sendmailId, virusname);
|
|
|
|
/*
|
|
* Setup err as a list of recipients
|
|
*/
|
|
err = (char *)cli_malloc(1024);
|
|
|
|
if(err == NULL) {
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
|
|
/*
|
|
* Use snprintf rather than printf since we don't know
|
|
* the length of privdata->from and may get a buffer
|
|
* overrun
|
|
*/
|
|
snprintf(err, 1023, _("Intercepted virus from %s to"),
|
|
privdata->from);
|
|
|
|
ptr = strchr(err, '\0');
|
|
|
|
i = 1024;
|
|
|
|
for(to = privdata->to; *to; to++) {
|
|
/*
|
|
* Re-alloc if we are about run out of buffer
|
|
* space
|
|
*
|
|
* TODO: Only append *to if it's a valid, local
|
|
* email address
|
|
*/
|
|
if(&ptr[strlen(*to) + 2] >= &err[i]) {
|
|
i += 1024;
|
|
err = cli_realloc(err, i);
|
|
if(err == NULL) {
|
|
clamfi_cleanup(ctx);
|
|
return cl_error;
|
|
}
|
|
ptr = strchr(err, '\0');
|
|
}
|
|
ptr = cli_strrcpy(ptr, " ");
|
|
ptr = cli_strrcpy(ptr, *to);
|
|
}
|
|
(void)strcpy(ptr, "\n");
|
|
|
|
/* Include the sendmail queue ID in the log */
|
|
logg("%s: %s %s", sendmailId, mess, err);
|
|
free(err);
|
|
|
|
if(!qflag) {
|
|
char cmd[128];
|
|
FILE *sendmail;
|
|
|
|
/*
|
|
* If the oflag is given this sendmail command
|
|
* will cause the mail being generated here to be
|
|
* scanned. So if oflag is given we just put the
|
|
* item in the queue so there's no scanning of two
|
|
* messages at once. It'll still be scanned, but
|
|
* not at the same time as the incoming message
|
|
*
|
|
* FIXME: there is a race condition here when sendmail
|
|
* and clamav-milter run on the same machine. If the
|
|
* system is very overloaded this sendmail can
|
|
* take a long time to start - and may even fail
|
|
* is the LA is > REFUSE_LA. In all the time we're
|
|
* taking to start this sendmail, the sendmail that's
|
|
* started us may timeout waiting for a response and
|
|
* let the virus through (albeit tagged with
|
|
* X-Virus-Status: Infected) because we haven't
|
|
* sent SMFIS_DISCARD or SMFIS_REJECT
|
|
*
|
|
* -i flag, suggested by Michal Jaegermann
|
|
* <michal@harddata.com>
|
|
*/
|
|
snprintf(cmd, sizeof(cmd) - 1,
|
|
(oflag || fflag) ? "%s -t -i -odq" : "%s -t -i",
|
|
SENDMAIL_BIN);
|
|
|
|
cli_dbgmsg("Calling %s\n", cmd);
|
|
sendmail = popen(cmd, "w");
|
|
|
|
if(sendmail) {
|
|
if(from && from[0])
|
|
fprintf(sendmail, "From: %s\n", from);
|
|
else
|
|
fprintf(sendmail, "From: %s\n", privdata->from);
|
|
#ifdef BOUNCE
|
|
if(bflag && privdata->from) {
|
|
fprintf(sendmail, "To: %s\n", privdata->from);
|
|
fprintf(sendmail, "Cc: %s\n", postmaster);
|
|
} else
|
|
#endif
|
|
fprintf(sendmail, "To: %s\n", postmaster);
|
|
|
|
if((!pflag) && privdata->to)
|
|
for(to = privdata->to; *to; to++)
|
|
fprintf(sendmail, "Cc: %s\n", *to);
|
|
/*
|
|
* Auto-submitted is still a draft, keep an
|
|
* eye on its format
|
|
*/
|
|
fputs("Auto-Submitted: auto-submitted (antivirus notify)\n", sendmail);
|
|
/* "Sergey Y. Afonin" <asy@kraft-s.ru> */
|
|
if((ptr = smfi_getsymval(ctx, "{_}")) != NULL)
|
|
fprintf(sendmail,
|
|
"X-Infected-Received-From: %s\n",
|
|
ptr);
|
|
fputs(_("Subject: Virus intercepted\n"), sendmail);
|
|
|
|
if(templateHeaders) {
|
|
/*
|
|
* For example, to state the character
|
|
* set of the message:
|
|
* Content-Type: text/plain; charset=koi8-r
|
|
*
|
|
* Based on a suggestion by Denis
|
|
* Eremenko <moonshade@mail.kz>
|
|
*/
|
|
FILE *fin = fopen(templateHeaders, "r");
|
|
|
|
if(fin == NULL) {
|
|
perror(templateHeaders);
|
|
logg(_("!Can't open e-mail template header file %s"),
|
|
templateHeaders);
|
|
} else {
|
|
int c;
|
|
int lastc = EOF;
|
|
|
|
while((c = getc(fin)) != EOF) {
|
|
putc(c, sendmail);
|
|
lastc = c;
|
|
}
|
|
fclose(fin);
|
|
/*
|
|
* File not new line terminated
|
|
*/
|
|
if(lastc != '\n')
|
|
fputs(_("\n"), sendmail);
|
|
}
|
|
}
|
|
|
|
fputs(_("\n"), sendmail);
|
|
|
|
if((templateFile == NULL) ||
|
|
(sendtemplate(ctx, templateFile, sendmail, virusname) < 0)) {
|
|
/*
|
|
* Use our own hardcoded template
|
|
*/
|
|
#ifdef BOUNCE
|
|
if(bflag)
|
|
fputs(_("A message you sent to\n"), sendmail);
|
|
else if(pflag)
|
|
#else
|
|
if(pflag)
|
|
#endif
|
|
/*
|
|
* The message is only going to
|
|
* the postmaster, so include
|
|
* some useful information
|
|
*/
|
|
fprintf(sendmail, _("The message %1$s sent from %2$s to\n"),
|
|
sendmailId, privdata->from);
|
|
else
|
|
fprintf(sendmail, _("A message sent from %s to\n"),
|
|
privdata->from);
|
|
|
|
for(to = privdata->to; *to; to++)
|
|
fprintf(sendmail, "\t%s\n", *to);
|
|
fprintf(sendmail, _("contained %s and has not been accepted for delivery.\n"), virusname);
|
|
|
|
if(quarantine_dir != NULL)
|
|
fprintf(sendmail, _("\nThe message in question has been quarantined as %s\n"), privdata->filename);
|
|
|
|
if(hflag) {
|
|
fprintf(sendmail, _("\nThe message was received by %1$s from %2$s via %3$s\n\n"),
|
|
smfi_getsymval(ctx, "j"), privdata->from,
|
|
smfi_getsymval(ctx, "_"));
|
|
fputs(_("For your information, the original message headers were:\n\n"), sendmail);
|
|
header_list_print(privdata->headers, sendmail);
|
|
} else if(privdata->received)
|
|
/*
|
|
* TODO: parse this to find
|
|
* real infected machine.
|
|
* Need to decide how to find
|
|
* if it's a dynamic IP from a
|
|
* dial up account in which
|
|
* case there may not be much
|
|
* we can do if that DHCP has
|
|
* set the hostname...
|
|
*/
|
|
fprintf(sendmail, _("\nThe infected machine is likely to be here:\n%s\t\n"),
|
|
privdata->received);
|
|
|
|
}
|
|
|
|
cli_dbgmsg("Waiting for %s to finish\n", cmd);
|
|
if(pclose(sendmail) != 0)
|
|
logg(_("%s: Failed to notify clamAV interception - see dead.letter\n"), sendmailId);
|
|
} else
|
|
logg(_("^Can't execute '%s' to send virus notice"), cmd);
|
|
}
|
|
|
|
if(report && (quarantine == NULL) && (!advisory) &&
|
|
(strstr(virusname, "Phishing") != NULL)) {
|
|
/*
|
|
* Report phishing to an agency
|
|
*/
|
|
for(to = privdata->to; *to; to++) {
|
|
smfi_delrcpt(ctx, *to);
|
|
smfi_addheader(ctx, "X-Original-To", *to);
|
|
}
|
|
if(smfi_addrcpt(ctx, report) == MI_FAILURE) {
|
|
/* It's a remote site */
|
|
if(privdata->filename) {
|
|
char cmd[1024];
|
|
|
|
snprintf(cmd, sizeof(cmd) - 1,
|
|
"mail -s \"%s\" %s < %s",
|
|
virusname, report,
|
|
privdata->filename);
|
|
if(system(cmd) == 0)
|
|
logg(_("#Reported phishing to %s"), report);
|
|
else
|
|
logg(_("^Couldn't report to %s\n"), report);
|
|
if((!rejectmail) || privdata->discard)
|
|
rc = SMFIS_DISCARD;
|
|
else
|
|
rc = SMFIS_REJECT;
|
|
} else {
|
|
logg(_("^Can't set anti-phish header\n"));
|
|
rc = (privdata->discard) ? SMFIS_DISCARD : SMFIS_REJECT;
|
|
}
|
|
} else {
|
|
setsubject(ctx, "Phishing attempt trapped by ClamAV and redirected");
|
|
|
|
logg("Redirected phish to %s\n", report);
|
|
}
|
|
} else if(quarantine) {
|
|
for(to = privdata->to; *to; to++) {
|
|
smfi_delrcpt(ctx, *to);
|
|
smfi_addheader(ctx, "X-Original-To", *to);
|
|
}
|
|
/*
|
|
* NOTE: on a closed relay this will not work
|
|
* if the recipient is a remote address
|
|
*/
|
|
if(smfi_addrcpt(ctx, quarantine) == MI_FAILURE) {
|
|
logg(_("^Can't set quarantine user %s"), quarantine);
|
|
rc = (privdata->discard) ? SMFIS_DISCARD : SMFIS_REJECT;
|
|
} else {
|
|
if(report &&
|
|
strstr(virusname, "Phishing") != NULL)
|
|
(void)smfi_addrcpt(ctx, report);
|
|
setsubject(ctx, virusname);
|
|
|
|
logg("Redirected virus to %s", quarantine);
|
|
}
|
|
} else if(advisory)
|
|
setsubject(ctx, virusname);
|
|
else if(rejectmail) {
|
|
if(privdata->discard)
|
|
rc = SMFIS_DISCARD;
|
|
else
|
|
rc = SMFIS_REJECT; /* Delete the e-mail */
|
|
} else
|
|
rc = SMFIS_DISCARD;
|
|
|
|
if(quarantine_dir) {
|
|
/*
|
|
* Cleanup filename here otherwise clamfi_free() will
|
|
* delete the file that we wish to keep because it
|
|
* is infected
|
|
*/
|
|
free(privdata->filename);
|
|
privdata->filename = NULL;
|
|
}
|
|
|
|
/*
|
|
* Don't drop the message if it's been forwarded to a
|
|
* quarantine email
|
|
*/
|
|
snprintf(reject, sizeof(reject) - 1, _("virus %s detected by ClamAV - http://www.clamav.net"), virusname);
|
|
smfi_setreply(ctx, (char *)privdata->rejectCode, "5.7.1", reject);
|
|
broadcast(mess);
|
|
|
|
if(blacklist_time && privdata->ip[0]) {
|
|
logg(_("Will blacklist %s for %d seconds because of %s\n"),
|
|
privdata->ip, blacklist_time, virusname);
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
(void)tableUpdate(blacklist, privdata->ip,
|
|
(int)time((time_t *)0));
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
}
|
|
} else if((strstr(mess, "OK") == NULL) && (strstr(mess, "Empty file") == NULL)) {
|
|
if(!nflag)
|
|
smfi_addheader(ctx, "X-Virus-Status", _("Unknown"));
|
|
logg(_("!%s: incorrect message \"%s\" from clamd"),
|
|
sendmailId, mess);
|
|
rc = cl_error;
|
|
} else {
|
|
if(!nflag)
|
|
smfi_addheader(ctx, "X-Virus-Status", _("Clean"));
|
|
|
|
/* Include the sendmail queue ID in the log */
|
|
if(logok)
|
|
logg(_("%s: clean message from %s\n"),
|
|
sendmailId,
|
|
(privdata->from) ? privdata->from : _("an unknown sender"));
|
|
|
|
if(privdata->body) {
|
|
/*
|
|
* Add a signature that all has been scanned OK
|
|
*
|
|
* Note that this is simple minded and isn't aware of
|
|
* any MIME segments in the message. In practice
|
|
* this means that the message will only display
|
|
* on users' terminals if the message is
|
|
* plain/text
|
|
*/
|
|
off_t len = updateSigFile();
|
|
|
|
if(len) {
|
|
assert(Sflag != 0);
|
|
|
|
privdata->body = cli_realloc(privdata->body, privdata->bodyLen + len);
|
|
if(privdata->body) {
|
|
memcpy(&privdata->body[privdata->bodyLen], signature, len);
|
|
smfi_replacebody(ctx, privdata->body, privdata->bodyLen + len);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static sfsistat
|
|
clamfi_abort(SMFICTX *ctx)
|
|
{
|
|
logg("*clamfi_abort\n");
|
|
|
|
clamfi_cleanup(ctx);
|
|
decrement_connexions();
|
|
|
|
logg("*clamfi_abort returns\n");
|
|
|
|
return cl_error;
|
|
}
|
|
|
|
static sfsistat
|
|
clamfi_close(SMFICTX *ctx)
|
|
{
|
|
logg("*clamfi_close\n");
|
|
|
|
clamfi_cleanup(ctx);
|
|
decrement_connexions();
|
|
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
static void
|
|
clamfi_cleanup(SMFICTX *ctx)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
|
|
cli_dbgmsg("clamfi_cleanup\n");
|
|
|
|
if(privdata) {
|
|
clamfi_free(privdata, 0);
|
|
smfi_setpriv(ctx, NULL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
clamfi_free(struct privdata *privdata, int keep)
|
|
{
|
|
cli_dbgmsg("clamfi_free\n");
|
|
|
|
if(privdata) {
|
|
#ifdef SESSION
|
|
struct session *session;
|
|
#endif
|
|
if(privdata->body)
|
|
free(privdata->body);
|
|
|
|
if(privdata->dataSocket >= 0)
|
|
close(privdata->dataSocket);
|
|
|
|
if(privdata->filename != NULL) {
|
|
/*
|
|
* Don't print an error if the file hasn't been
|
|
* created yet
|
|
*/
|
|
if((unlink(privdata->filename) < 0) && (errno != ENOENT)) {
|
|
perror(privdata->filename);
|
|
logg(_("!Can't remove clean file %s"),
|
|
privdata->filename);
|
|
}
|
|
free(privdata->filename);
|
|
}
|
|
|
|
if(privdata->from) {
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 9)
|
|
cli_dbgmsg("Free privdata->from\n");
|
|
#endif
|
|
free(privdata->from);
|
|
}
|
|
|
|
if(privdata->subject)
|
|
free(privdata->subject);
|
|
if(privdata->sender)
|
|
free(privdata->sender);
|
|
|
|
if(privdata->to) {
|
|
char **to;
|
|
|
|
for(to = privdata->to; *to; to++) {
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 9)
|
|
cli_dbgmsg("Free *privdata->to\n");
|
|
#endif
|
|
free(*to);
|
|
}
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 9)
|
|
cli_dbgmsg("Free privdata->to\n");
|
|
#endif
|
|
free(privdata->to);
|
|
}
|
|
|
|
if(external) {
|
|
#ifdef SESSION
|
|
session = &sessions[privdata->serverNumber];
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
if(session->status == CMDSOCKET_INUSE) {
|
|
/*
|
|
* Probably we've got here because
|
|
* StreamMaxLength has been reached
|
|
*/
|
|
#if 0
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
if(readTimeout) {
|
|
char buf[64];
|
|
const int fd = session->sock;
|
|
|
|
cli_dbgmsg("clamfi_free: flush server %d fd %d\n",
|
|
privdata->serverNumber, fd);
|
|
|
|
/*
|
|
* FIXME: whenever this code gets
|
|
* executed, all of the PINGs fail
|
|
* in the next watchdog cycle
|
|
*/
|
|
while(clamd_recv(fd, buf, sizeof(buf)) > 0)
|
|
;
|
|
}
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
#endif
|
|
/* Force a reset */
|
|
session->status = CMDSOCKET_DOWN;
|
|
}
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
#else
|
|
if(privdata->cmdSocket >= 0) {
|
|
#if 0
|
|
char buf[64];
|
|
|
|
/*
|
|
* Flush the remote end so that clamd doesn't
|
|
* get a SIGPIPE
|
|
*/
|
|
if(readTimeout)
|
|
while(clamd_recv(privdata->cmdSocket, buf, sizeof(buf)) > 0)
|
|
;
|
|
#endif
|
|
close(privdata->cmdSocket);
|
|
}
|
|
#endif
|
|
} else if(privdata->root)
|
|
/*
|
|
* Since only one of clamfi_abort() and clamfi_eom()
|
|
* can ever be called, and the only cl_dup is in
|
|
* clamfi_eom() which calls cl_free soon after, this
|
|
* should be overkill, since this can "never happen"
|
|
*/
|
|
cl_free(privdata->root);
|
|
|
|
if(privdata->headers)
|
|
header_list_free(privdata->headers);
|
|
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 9)
|
|
cli_dbgmsg("Free privdata\n");
|
|
#endif
|
|
if(privdata->received)
|
|
free(privdata->received);
|
|
|
|
if(keep) {
|
|
memset(privdata, '\0', sizeof(struct privdata));
|
|
#ifdef SESSION
|
|
privdata->dataSocket = -1;
|
|
#else
|
|
privdata->dataSocket = privdata->cmdSocket = -1;
|
|
#endif
|
|
} else
|
|
free(privdata);
|
|
}
|
|
|
|
cli_dbgmsg("clamfi_free returns\n");
|
|
}
|
|
|
|
/*
|
|
* Returns < 0 for failure, otherwise the number of bytes sent
|
|
*/
|
|
static int
|
|
clamfi_send(struct privdata *privdata, size_t len, const char *format, ...)
|
|
{
|
|
char output[BUFSIZ];
|
|
const char *ptr;
|
|
int ret = 0;
|
|
|
|
assert(format != NULL);
|
|
|
|
if(len > 0)
|
|
/*
|
|
* It isn't a NUL terminated string. We have a set number of
|
|
* bytes to output.
|
|
*/
|
|
ptr = format;
|
|
else {
|
|
va_list argp;
|
|
|
|
va_start(argp, format);
|
|
vsnprintf(output, sizeof(output) - 1, format, argp);
|
|
va_end(argp);
|
|
|
|
len = strlen(output);
|
|
ptr = output;
|
|
}
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 9) {
|
|
time_t t;
|
|
const struct tm *tm;
|
|
|
|
time(&t);
|
|
tm = localtime(&t);
|
|
|
|
cli_dbgmsg("%d:%d:%d clamfi_send: len=%u bufsiz=%u, fd=%d\n",
|
|
tm->tm_hour, tm->tm_min, tm->tm_sec, len,
|
|
sizeof(output), privdata->dataSocket);
|
|
}
|
|
#endif
|
|
|
|
while(len > 0) {
|
|
const int nbytes = (privdata->filename) ?
|
|
write(privdata->dataSocket, ptr, len) :
|
|
send(privdata->dataSocket, ptr, len, 0);
|
|
|
|
assert(privdata->dataSocket >= 0);
|
|
|
|
if(nbytes == -1) {
|
|
if(privdata->filename) {
|
|
#ifdef HAVE_STRERROR_R
|
|
char buf[32];
|
|
|
|
perror(privdata->filename);
|
|
strerror_r(errno, buf, sizeof(buf));
|
|
logg(_("!write failure (%lu bytes) to %s: %s\n"),
|
|
(unsigned long)len, privdata->filename, buf);
|
|
#else
|
|
perror(privdata->filename);
|
|
logg(_("!write failure (%lu bytes) to %s: %s\n"),
|
|
(unsigned long)len, privdata->filename,
|
|
strerror(errno));
|
|
#endif
|
|
} else {
|
|
if(errno == EINTR)
|
|
continue;
|
|
perror("send");
|
|
#ifdef HAVE_STRERROR_R
|
|
{
|
|
char buf[32];
|
|
strerror_r(errno, buf, sizeof(buf));
|
|
logg(_("!write failure (%lu bytes) to clamd: %s\n"),
|
|
(unsigned long)len, buf);
|
|
}
|
|
#else
|
|
logg(_("!write failure (%lu bytes) to clamd: %s\n"),
|
|
(unsigned long)len, strerror(errno));
|
|
#endif
|
|
checkClamd(1);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
ret += nbytes;
|
|
len -= nbytes;
|
|
ptr = &ptr[nbytes];
|
|
|
|
if(streamMaxLength > 0L) {
|
|
privdata->numBytes += nbytes;
|
|
if(privdata->numBytes >= streamMaxLength)
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Like strcpy, but return the END of the destination, allowing a quicker
|
|
* means of adding to the end of a string than strcat
|
|
*/
|
|
#if 0
|
|
static char *
|
|
strrcpy(char *dest, const char *source)
|
|
{
|
|
/* Pre assertions */
|
|
assert(dest != NULL);
|
|
assert(source != NULL);
|
|
assert(dest != source);
|
|
|
|
while((*dest++ = *source++) != '\0')
|
|
;
|
|
return(--dest);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Read from clamav - timeout if necessary
|
|
*/
|
|
static long
|
|
clamd_recv(int sock, char *buf, size_t len)
|
|
{
|
|
struct timeval tv;
|
|
long ret;
|
|
|
|
assert(sock >= 0);
|
|
|
|
if(readTimeout == 0) {
|
|
do
|
|
/* TODO: Needs a test for ssize_t in configure */
|
|
ret = (long)recv(sock, buf, len, 0);
|
|
while((ret < 0) && (errno == EINTR));
|
|
|
|
return ret;
|
|
}
|
|
|
|
tv.tv_sec = readTimeout;
|
|
tv.tv_usec = 0;
|
|
|
|
for(;;) {
|
|
fd_set rfds;
|
|
|
|
FD_ZERO(&rfds);
|
|
FD_SET(sock, &rfds);
|
|
|
|
switch(select(sock + 1, &rfds, NULL, NULL, &tv)) {
|
|
case -1:
|
|
if(errno == EINTR)
|
|
/* FIXME: work out time left */
|
|
continue;
|
|
perror("select");
|
|
return -1;
|
|
case 0:
|
|
logg(_("!No data received from clamd in %d seconds\n"), readTimeout);
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
do
|
|
ret = recv(sock, buf, len, 0);
|
|
while((ret < 0) && (errno == EINTR));
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Read in the signature file
|
|
*/
|
|
static off_t
|
|
updateSigFile(void)
|
|
{
|
|
struct stat statb;
|
|
int fd;
|
|
|
|
if(sigFilename == NULL)
|
|
/* nothing to read */
|
|
return 0;
|
|
|
|
if(stat(sigFilename, &statb) < 0) {
|
|
perror(sigFilename);
|
|
logg(_("Can't stat %s"), sigFilename);
|
|
return 0;
|
|
}
|
|
|
|
if(statb.st_mtime <= signatureStamp)
|
|
return statb.st_size; /* not changed */
|
|
|
|
fd = open(sigFilename, O_RDONLY);
|
|
if(fd < 0) {
|
|
perror(sigFilename);
|
|
logg(_("Can't open %s"), sigFilename);
|
|
return 0;
|
|
}
|
|
|
|
signatureStamp = statb.st_mtime;
|
|
|
|
signature = cli_realloc(signature, statb.st_size);
|
|
if(signature)
|
|
cli_readn(fd, signature, statb.st_size);
|
|
close(fd);
|
|
|
|
return statb.st_size;
|
|
}
|
|
|
|
static header_list_t
|
|
header_list_new(void)
|
|
{
|
|
header_list_t ret;
|
|
|
|
ret = (header_list_t)cli_malloc(sizeof(struct header_list_struct));
|
|
if(ret) {
|
|
ret->first = NULL;
|
|
ret->last = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
header_list_free(header_list_t list)
|
|
{
|
|
struct header_node_t *iter;
|
|
|
|
iter = list->first;
|
|
while(iter) {
|
|
struct header_node_t *iter2 = iter->next;
|
|
free(iter->header);
|
|
free(iter);
|
|
iter = iter2;
|
|
}
|
|
free(list);
|
|
}
|
|
|
|
static void
|
|
header_list_add(header_list_t list, const char *headerf, const char *headerv)
|
|
{
|
|
char *header;
|
|
size_t len;
|
|
struct header_node_t *new_node;
|
|
|
|
len = (size_t)(strlen(headerf) + strlen(headerv) + 3);
|
|
|
|
header = (char *)cli_malloc(len);
|
|
if(header == NULL)
|
|
return;
|
|
|
|
sprintf(header, "%s: %s", headerf, headerv);
|
|
new_node = (struct header_node_t *)cli_malloc(sizeof(struct header_node_t));
|
|
if(new_node == NULL) {
|
|
free(header);
|
|
return;
|
|
}
|
|
new_node->header = header;
|
|
new_node->next = NULL;
|
|
if(list->first == NULL)
|
|
list->first = new_node;
|
|
if(list->last)
|
|
list->last->next = new_node;
|
|
|
|
list->last = new_node;
|
|
}
|
|
|
|
static void
|
|
header_list_print(const header_list_t list, FILE *fp)
|
|
{
|
|
const struct header_node_t *iter;
|
|
|
|
if(list == NULL)
|
|
return;
|
|
|
|
for(iter = list->first; iter; iter = iter->next) {
|
|
if(strncmp(iter->header, "From ", 5) == 0)
|
|
putc('>', fp);
|
|
fprintf(fp, "%s\n", iter->header);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Establish a connexion to clamd
|
|
* Returns success (1) or failure (0)
|
|
*/
|
|
static int
|
|
connect2clamd(struct privdata *privdata)
|
|
{
|
|
assert(privdata != NULL);
|
|
assert(privdata->dataSocket == -1);
|
|
assert(privdata->from != NULL);
|
|
assert(privdata->to != NULL);
|
|
|
|
logg("*connect2clamd\n");
|
|
|
|
if(quarantine_dir || tmpdir) { /* store message in a temporary file */
|
|
int ntries = 5;
|
|
const char *dir = (tmpdir) ? tmpdir : quarantine_dir;
|
|
|
|
/*
|
|
* TODO: investigate mkdtemp on LINUX and possibly others
|
|
*/
|
|
#ifdef C_AIX
|
|
/*
|
|
* Patch by Andy Feldt <feldt@nhn.ou.edu>, AIX 5.2 sets errno
|
|
* to ENOENT often and sometimes sets errno to 0 (after a
|
|
* database reload) for the mkdir call
|
|
*/
|
|
if((mkdir(dir, 0700) < 0) && (errno != EEXIST) && (errno > 0) &&
|
|
(errno != ENOENT)) {
|
|
#else
|
|
if((mkdir(dir, 0700) < 0) && (errno != EEXIST)) {
|
|
#endif
|
|
perror(dir);
|
|
logg(_("mkdir %s failed"), dir);
|
|
return 0;
|
|
}
|
|
privdata->filename = (char *)cli_malloc(strlen(dir) + 12);
|
|
|
|
if(privdata->filename == NULL)
|
|
return 0;
|
|
|
|
do {
|
|
sprintf(privdata->filename, "%s/msg.XXXXXX", dir);
|
|
#if defined(C_LINUX) || defined(C_BSD) || defined(HAVE_MKSTEMP) || defined(C_SOLARIS)
|
|
privdata->dataSocket = mkstemp(privdata->filename);
|
|
#else
|
|
if(mktemp(privdata->filename) == NULL) {
|
|
logg(_("mktemp %s failed"), privdata->filename);
|
|
return 0;
|
|
}
|
|
privdata->dataSocket = open(privdata->filename, O_CREAT|O_EXCL|O_WRONLY|O_TRUNC, 0600);
|
|
#endif
|
|
} while((--ntries > 0) && (privdata->dataSocket < 0));
|
|
|
|
if(privdata->dataSocket < 0) {
|
|
perror(privdata->filename);
|
|
logg(_("Temporary quarantine file %s creation failed"),
|
|
privdata->filename);
|
|
free(privdata->filename);
|
|
privdata->filename = NULL;
|
|
return 0;
|
|
}
|
|
privdata->serverNumber = 0;
|
|
cli_dbgmsg("Saving message to %s to scan later\n", privdata->filename);
|
|
} else { /* communicate to clamd */
|
|
int freeServer, nbytes;
|
|
in_port_t p;
|
|
struct sockaddr_in reply;
|
|
char buf[64];
|
|
|
|
#ifdef SESSION
|
|
struct session *session;
|
|
#else
|
|
assert(privdata->cmdSocket == -1);
|
|
#endif
|
|
|
|
/*
|
|
* Create socket to talk to clamd. It will tell us the port to
|
|
* use to send the data. That will require another socket.
|
|
*/
|
|
if(localSocket) {
|
|
#ifndef SESSION
|
|
struct sockaddr_un server;
|
|
|
|
memset((char *)&server, 0, sizeof(struct sockaddr_un));
|
|
server.sun_family = AF_UNIX;
|
|
strncpy(server.sun_path, localSocket, sizeof(server.sun_path));
|
|
|
|
if((privdata->cmdSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
|
|
perror("socket");
|
|
return 0;
|
|
}
|
|
if(connect(privdata->cmdSocket, (struct sockaddr *)&server, sizeof(struct sockaddr_un)) < 0) {
|
|
perror(localSocket);
|
|
return 0;
|
|
}
|
|
privdata->serverNumber = 0;
|
|
#endif
|
|
freeServer = 0;
|
|
} else { /* TCP/IP */
|
|
#ifdef SESSION
|
|
freeServer = findServer();
|
|
if(freeServer < 0)
|
|
return 0;
|
|
assert(freeServer < (int)max_children);
|
|
#else
|
|
struct sockaddr_in server;
|
|
|
|
memset((char *)&server, 0, sizeof(struct sockaddr_in));
|
|
server.sin_family = AF_INET;
|
|
server.sin_port = (in_port_t)htons(tcpSocket);
|
|
|
|
assert(serverIPs != NULL);
|
|
|
|
freeServer = findServer();
|
|
if(freeServer < 0)
|
|
return 0;
|
|
assert(freeServer < (int)numServers);
|
|
|
|
server.sin_addr.s_addr = serverIPs[freeServer];
|
|
|
|
if((privdata->cmdSocket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
perror("socket");
|
|
return 0;
|
|
}
|
|
if(connect(privdata->cmdSocket, (struct sockaddr *)&server, sizeof(struct sockaddr_in)) < 0) {
|
|
char *hostname = cli_strtok(serverHostNames, freeServer, ":");
|
|
|
|
perror(hostname ? hostname : "connect");
|
|
close(privdata->cmdSocket);
|
|
privdata->cmdSocket = -1;
|
|
if(hostname)
|
|
free(hostname);
|
|
time(&last_failed_pings[freeServer]);
|
|
return 0;
|
|
}
|
|
last_failed_pings[freeServer] = (time_t)0;
|
|
#endif
|
|
privdata->serverNumber = freeServer;
|
|
}
|
|
|
|
#ifdef SESSION
|
|
if(serverIPs[freeServer] == (int)inet_addr("127.0.0.1")) {
|
|
privdata->filename = cli_gentemp(NULL);
|
|
if(privdata->filename) {
|
|
cli_dbgmsg("connect2clamd(%d): creating %s\n", freeServer, privdata->filename);
|
|
#ifdef O_TEXT
|
|
privdata->dataSocket = open(privdata->filename, O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_TEXT, 0600);
|
|
#else
|
|
privdata->dataSocket = open(privdata->filename, O_WRONLY|O_CREAT|O_EXCL|O_TRUNC, 0600);
|
|
#endif
|
|
if(privdata->dataSocket < 0) {
|
|
perror(privdata->filename);
|
|
free(privdata->filename);
|
|
privdata->filename = NULL;
|
|
} else
|
|
return sendToFrom(privdata);
|
|
}
|
|
}
|
|
cli_dbgmsg("connect2clamd(%d): STREAM\n", freeServer);
|
|
|
|
session = &sessions[freeServer];
|
|
if((session->sock < 0) || (send(session->sock, "STREAM\n", 7, 0) < 7)) {
|
|
perror("send");
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
session->status = CMDSOCKET_DOWN;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
logg(_("!failed to send STREAM command clamd server %d"),
|
|
freeServer);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
if(send(privdata->cmdSocket, "STREAM\n", 7, 0) < 7) {
|
|
perror("send");
|
|
logg(_("!failed to send STREAM command clamd"));
|
|
return 0;
|
|
}
|
|
shutdown(privdata->cmdSocket, SHUT_WR);
|
|
#endif
|
|
|
|
/*
|
|
* Create socket that we'll use to send the data to clamd
|
|
*/
|
|
if((privdata->dataSocket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
perror("socket");
|
|
logg(_("!failed to create TCPSocket to talk to clamd"));
|
|
return 0;
|
|
}
|
|
|
|
shutdown(privdata->dataSocket, SHUT_RD);
|
|
|
|
#ifdef SESSION
|
|
nbytes = clamd_recv(session->sock, buf, sizeof(buf));
|
|
if(nbytes <= 0) {
|
|
if(nbytes < 0) {
|
|
perror("recv");
|
|
logg(_("!recv failed from clamd getting PORT"));
|
|
} else
|
|
logg(_("!EOF from clamd getting PORT"));
|
|
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
session->status = CMDSOCKET_DOWN;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
return 0;
|
|
}
|
|
#else
|
|
nbytes = clamd_recv(privdata->cmdSocket, buf, sizeof(buf));
|
|
if(nbytes <= 0) {
|
|
if(nbytes < 0) {
|
|
perror("recv");
|
|
logg(_("!recv failed from clamd getting PORT"));
|
|
} else
|
|
logg(_("!EOF from clamd getting PORT"));
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
buf[nbytes] = '\0';
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 4)
|
|
cli_dbgmsg("Received: %s", buf);
|
|
#endif
|
|
if(sscanf(buf, "PORT %hu\n", &p) != 1) {
|
|
logg(_("!Expected port information from clamd, got '%s'"),
|
|
buf);
|
|
#ifdef SESSION
|
|
session->status = CMDSOCKET_DOWN;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
memset((char *)&reply, 0, sizeof(struct sockaddr_in));
|
|
reply.sin_family = AF_INET;
|
|
reply.sin_port = (in_port_t)htons(p);
|
|
|
|
assert(serverIPs != NULL);
|
|
|
|
reply.sin_addr.s_addr = serverIPs[freeServer];
|
|
|
|
#ifdef CL_DEBUG
|
|
if(debug_level >= 4)
|
|
#ifdef SESSION
|
|
cli_dbgmsg(_("Connecting to local port %d - data %d cmd %d\n"),
|
|
p, privdata->dataSocket, session->sock);
|
|
#else
|
|
cli_dbgmsg(_("Connecting to local port %d - data %d cmd %d\n"),
|
|
p, privdata->dataSocket, privdata->cmdSocket);
|
|
#endif
|
|
#endif
|
|
|
|
if(connect(privdata->dataSocket, (struct sockaddr *)&reply, sizeof(struct sockaddr_in)) < 0) {
|
|
perror("connect");
|
|
|
|
cli_dbgmsg("Failed to connect to port %d given by clamd",
|
|
p);
|
|
/* 0.4 - use better error message */
|
|
#ifdef HAVE_STRERROR_R
|
|
strerror_r(errno, buf, sizeof(buf));
|
|
logg(_("!Failed to connect to port %d given by clamd: %s"),
|
|
p, buf);
|
|
#else
|
|
logg(_("!Failed to connect to port %d given by clamd: %s"), p, strerror(errno));
|
|
#endif
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
session->status = CMDSOCKET_DOWN;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
#endif
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if(!sendToFrom(privdata))
|
|
return 0;
|
|
|
|
cli_dbgmsg("connect2clamd: serverNumber = %d\n", privdata->serverNumber);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Combine the To and From into one clamfi_send to save bandwidth
|
|
* when sending using TCP/IP to connect to a remote clamd, by band
|
|
* width here I mean number of packets
|
|
*/
|
|
static int
|
|
sendToFrom(struct privdata *privdata)
|
|
{
|
|
char **to;
|
|
char *msg;
|
|
int length;
|
|
|
|
length = strlen(privdata->from) + 34;
|
|
for(to = privdata->to; *to; to++)
|
|
length += strlen(*to) + 5;
|
|
|
|
msg = cli_malloc(length + 1);
|
|
|
|
if(msg) {
|
|
sprintf(msg, "Received: by clamav-milter\nFrom: %s\n",
|
|
privdata->from);
|
|
|
|
for(to = privdata->to; *to; to++) {
|
|
char *eom = strchr(msg, '\0');
|
|
|
|
sprintf(eom, "To: %s\n", *to);
|
|
}
|
|
if(clamfi_send(privdata, length, msg) != length) {
|
|
free(msg);
|
|
return 0;
|
|
}
|
|
free(msg);
|
|
} else {
|
|
if(clamfi_send(privdata, 0,
|
|
"Received: by clamav-milter\nFrom: %s\n",
|
|
privdata->from) <= 0)
|
|
return 0;
|
|
|
|
for(to = privdata->to; *to; to++)
|
|
if(clamfi_send(privdata, 0, "To: %s\n", *to) <= 0)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* If possible, check if clamd has died, and, if requested, report if it has
|
|
* Returns true if OK or unknown, otherwise false
|
|
*/
|
|
static int
|
|
checkClamd(int log_result)
|
|
{
|
|
pid_t pid;
|
|
int fd, nbytes;
|
|
char buf[9];
|
|
|
|
if(!localSocket) {
|
|
/* communicating via TCP, is one of the servers localhost? */
|
|
int i, onlocal;
|
|
|
|
onlocal = 0;
|
|
for(i = 0; i < numServers; i++)
|
|
#ifdef INADDR_LOOPBACK
|
|
if(serverIPs[0] == htonl(INADDR_LOOPBACK)) {
|
|
#else
|
|
if(serverIPs[0] == inet_addr("127.0.0.1")) {
|
|
#endif
|
|
onlocal = 1;
|
|
break;
|
|
}
|
|
|
|
if(!onlocal) {
|
|
/* No local clamd, use pingServer() to tell */
|
|
for(i = 0; i < numServers; i++)
|
|
if(serverIPs[i] && pingServer(i))
|
|
return 1;
|
|
if(log_result)
|
|
logg(_("!Can't find any clamd server\n"));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if(pidFile == NULL)
|
|
return 1; /* PidFile directive missing from clamd.conf */
|
|
|
|
fd = open(pidFile, O_RDONLY);
|
|
if(fd < 0) {
|
|
if(log_result) {
|
|
perror(pidFile);
|
|
logg(_("!Can't open %s\n"), pidFile);
|
|
}
|
|
return 1; /* unknown */
|
|
}
|
|
nbytes = read(fd, buf, sizeof(buf) - 1);
|
|
if(nbytes < 0)
|
|
perror(pidFile);
|
|
else
|
|
buf[nbytes] = '\0';
|
|
close(fd);
|
|
pid = atoi(buf);
|
|
if((kill(pid, 0) < 0) && (errno == ESRCH)) {
|
|
if(log_result) {
|
|
perror("clamd");
|
|
logg(_("!Clamd (pid %d) seems to have died\n"), (int)pid);
|
|
}
|
|
return 0; /* down */
|
|
}
|
|
return 1; /* up */
|
|
}
|
|
|
|
/*
|
|
* Send a templated message about an intercepted message. Very basic for
|
|
* now, just to prove it works, will enhance the flexability later, only
|
|
* supports %v and $sendmail_variables$ at present.
|
|
*
|
|
* TODO: more template features
|
|
* TODO: allow filename to start with a '|' taken to mean the output of
|
|
* a program
|
|
*/
|
|
static int
|
|
sendtemplate(SMFICTX *ctx, const char *filename, FILE *sendmail, const char *virusname)
|
|
{
|
|
FILE *fin = fopen(filename, "r");
|
|
struct stat statb;
|
|
char *buf, *ptr /* , *ptr2 */;
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
|
|
if(fin == NULL) {
|
|
perror(filename);
|
|
logg(_("!Can't open e-mail template file %s"), filename);
|
|
return -1;
|
|
}
|
|
|
|
if(fstat(fileno(fin), &statb) < 0) {
|
|
/* File disappeared in race condition? */
|
|
perror(filename);
|
|
logg(_("!Can't stat e-mail template file %s"), filename);
|
|
fclose(fin);
|
|
return -1;
|
|
}
|
|
buf = cli_malloc(statb.st_size + 1);
|
|
if(buf == NULL) {
|
|
fclose(fin);
|
|
logg(_("!Out of memory"));
|
|
return -1;
|
|
}
|
|
if(fread(buf, sizeof(char), statb.st_size, fin) != (size_t)statb.st_size) {
|
|
perror(filename);
|
|
logg(_("!Error reading e-mail template file %s"),
|
|
filename);
|
|
fclose(fin);
|
|
free(buf);
|
|
return -1;
|
|
}
|
|
fclose(fin);
|
|
buf[statb.st_size] = '\0';
|
|
|
|
for(ptr = buf; *ptr; ptr++)
|
|
switch(*ptr) {
|
|
case '%': /* clamAV variable */
|
|
switch(*++ptr) {
|
|
case 'v': /* virus name */
|
|
fputs(virusname, sendmail);
|
|
break;
|
|
case '%':
|
|
putc('%', sendmail);
|
|
break;
|
|
case 'h': /* headers */
|
|
if(privdata)
|
|
header_list_print(privdata->headers, sendmail);
|
|
break;
|
|
case '\0':
|
|
putc('%', sendmail);
|
|
--ptr;
|
|
continue;
|
|
default:
|
|
logg(_("!%s: Unknown clamAV variable \"%c\"\n"),
|
|
filename, *ptr);
|
|
break;
|
|
}
|
|
break;
|
|
case '$': /* sendmail string */ {
|
|
const char *val;
|
|
char *end = strchr(++ptr, '$');
|
|
|
|
if(end == NULL) {
|
|
logg(_("!%s: Unterminated sendmail variable \"%s\"\n"),
|
|
filename, ptr);
|
|
continue;
|
|
}
|
|
*end = '\0';
|
|
|
|
val = smfi_getsymval(ctx, ptr);
|
|
if(val == NULL) {
|
|
fputs(ptr, sendmail);
|
|
logg(_("!%s: Unknown sendmail variable \"%s\"\n"),
|
|
filename, ptr);
|
|
} else
|
|
fputs(val, sendmail);
|
|
ptr = end;
|
|
break;
|
|
}
|
|
case '\\':
|
|
if(*++ptr == '\0') {
|
|
--ptr;
|
|
continue;
|
|
}
|
|
putc(*ptr, sendmail);
|
|
break;
|
|
default:
|
|
putc(*ptr, sendmail);
|
|
}
|
|
|
|
free(buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Keep the infected file in quarantine, return success (0) or failure
|
|
*
|
|
* It's quicker if the quarantine directory is on the same filesystem
|
|
* as the temporary directory
|
|
*/
|
|
static int
|
|
qfile(struct privdata *privdata, const char *sendmailId, const char *virusname)
|
|
{
|
|
int MM, YY, DD;
|
|
time_t t;
|
|
size_t len;
|
|
char *newname, *ptr;
|
|
const struct tm *tm;
|
|
|
|
assert(privdata != NULL);
|
|
|
|
if((privdata->filename == NULL) || (virusname == NULL))
|
|
return -1;
|
|
|
|
cli_dbgmsg("qfile filename '%s' sendmailId '%s' virusname '%s'\n", privdata->filename, sendmailId, virusname);
|
|
|
|
len = strlen(quarantine_dir);
|
|
|
|
newname = cli_malloc(len + strlen(sendmailId) + strlen(virusname) + 10);
|
|
|
|
if(newname == NULL)
|
|
return -1;
|
|
|
|
t = time((time_t *)0);
|
|
tm = localtime(&t);
|
|
MM = tm->tm_mon + 1;
|
|
YY = tm->tm_year - 100;
|
|
DD = tm->tm_mday;
|
|
|
|
sprintf(newname, "%s/%02d%02d%02d", quarantine_dir, YY, MM, DD);
|
|
#ifdef C_AIX
|
|
if((mkdir(newname, 0700) < 0) && (errno != EEXIST) && (errno > 0) &&
|
|
(errno != ENOENT)) {
|
|
#else
|
|
if((mkdir(newname, 0700) < 0) && (errno != EEXIST)) {
|
|
#endif
|
|
perror(newname);
|
|
logg(_("!mkdir %s failed\n"), newname);
|
|
return -1;
|
|
}
|
|
sprintf(newname, "%s/%02d%02d%02d/%s.%s",
|
|
quarantine_dir, YY, MM, DD, sendmailId, virusname);
|
|
|
|
/*
|
|
* Strip out funnies that may be in the name of the virus, such as '/'
|
|
* that would cause the quarantine to fail to save since the name
|
|
* of the virus is included in the filename
|
|
*/
|
|
for(ptr = &newname[len + 8]; *ptr; ptr++) {
|
|
#ifdef C_DARWIN
|
|
*ptr &= '\177';
|
|
#endif
|
|
#if defined(MSDOS) || defined(C_CYGWIN) || defined(C_WINDOWS) || defined(C_OS2)
|
|
if(strchr("/*?<>|\\\"+=,;:\t ", *ptr))
|
|
#else
|
|
if(*ptr == '/')
|
|
#endif
|
|
*ptr = '_';
|
|
}
|
|
cli_dbgmsg("qfile move '%s' to '%s'\n", privdata->filename, newname);
|
|
|
|
if(move(privdata->filename, newname) < 0) {
|
|
logg(_("^Can't rename %1$s to %2$s\n"),
|
|
privdata->filename, newname);
|
|
free(newname);
|
|
return -1;
|
|
}
|
|
free(privdata->filename);
|
|
privdata->filename = newname;
|
|
|
|
logg(_("Email quarantined as %s\n"), newname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Move oldfile to newfile using the fastest possible method
|
|
*/
|
|
static int
|
|
move(const char *oldfile, const char *newfile)
|
|
{
|
|
int ret, c;
|
|
FILE *fin, *fout;
|
|
#ifdef C_LINUX
|
|
struct stat statb;
|
|
int in, out;
|
|
off_t offset;
|
|
#endif
|
|
|
|
ret = rename(oldfile, newfile);
|
|
if(ret >= 0)
|
|
return 0;
|
|
|
|
if((ret < 0) && (errno != EXDEV)) {
|
|
perror(newfile);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef C_LINUX /* >= 2.2 */
|
|
in = open(oldfile, O_RDONLY);
|
|
if(in < 0) {
|
|
perror(oldfile);
|
|
return -1;
|
|
}
|
|
|
|
if(fstat(in, &statb) < 0) {
|
|
perror(oldfile);
|
|
close(in);
|
|
return -1;
|
|
}
|
|
out = open(newfile, O_WRONLY|O_CREAT, 0600);
|
|
if(out < 0) {
|
|
perror(newfile);
|
|
close(in);
|
|
return -1;
|
|
}
|
|
offset = (off_t)0;
|
|
ret = sendfile(out, in, &offset, statb.st_size);
|
|
close(in);
|
|
if(ret < 0) {
|
|
/*
|
|
* Fall back if sendfile fails, which will happen on Linux
|
|
* 2.6 :-(. FreeBSD works correctly, so the ifdef should be
|
|
* fixed
|
|
*/
|
|
close(out);
|
|
unlink(newfile);
|
|
|
|
fin = fopen(oldfile, "r");
|
|
if(fin == NULL)
|
|
return -1;
|
|
|
|
fout = fopen(newfile, "w");
|
|
if(fout == NULL) {
|
|
fclose(fin);
|
|
return -1;
|
|
}
|
|
while((c = getc(fin)) != EOF)
|
|
putc(c, fout);
|
|
|
|
fclose(fin);
|
|
fclose(fout);
|
|
} else
|
|
close(out);
|
|
#else
|
|
fin = fopen(oldfile, "r");
|
|
if(fin == NULL)
|
|
return -1;
|
|
|
|
fout = fopen(newfile, "w");
|
|
if(fout == NULL) {
|
|
fclose(fin);
|
|
return -1;
|
|
}
|
|
while((c = getc(fin)) != EOF)
|
|
putc(c, fout);
|
|
|
|
fclose(fin);
|
|
fclose(fout);
|
|
#endif
|
|
|
|
cli_dbgmsg("removing %s\n", oldfile);
|
|
|
|
return unlink(oldfile);
|
|
}
|
|
|
|
/*
|
|
* Store the name of the virus in the subject of the e-mail
|
|
*/
|
|
static void
|
|
setsubject(SMFICTX *ctx, const char *virusname)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)smfi_getpriv(ctx);
|
|
char subject[128];
|
|
|
|
if(privdata->subject)
|
|
smfi_addheader(ctx, "X-Original-Subject", privdata->subject);
|
|
|
|
snprintf(subject, sizeof(subject) - 1, _("[Virus] %s"), virusname);
|
|
if(privdata->subject)
|
|
smfi_chgheader(ctx, "Subject", 1, subject);
|
|
else
|
|
smfi_addheader(ctx, "Subject", subject);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* TODO: gethostbyname_r is non-standard so different operating
|
|
* systems do it in different ways. Need more examples
|
|
* Perhaps we could use res_search()?
|
|
* Perhaps we could use http://www.chiark.greenend.org.uk/~ian/adns/
|
|
*
|
|
* Returns 0 for success
|
|
*/
|
|
static int
|
|
clamfi_gethostbyname(const char *hostname, struct hostent *hp, char *buf, size_t len)
|
|
{
|
|
#if defined(HAVE_GETHOSTBYNAME_R_6)
|
|
/* e.g. Linux */
|
|
struct hostent *hp2;
|
|
int ret = -1;
|
|
|
|
if((hostname == NULL) || (hp == NULL))
|
|
return -1;
|
|
if(gethostbyname_r(hostname, hp, buf, len, &hp2, &ret) < 0)
|
|
return ret;
|
|
#elif defined(HAVE_GETHOSTBYNAME_R_5)
|
|
/* e.g. BSD, Solaris, Cygwin */
|
|
int ret = -1;
|
|
|
|
if((hostname == NULL) || (hp == NULL))
|
|
return -1;
|
|
if(gethostbyname_r(hostname, hp, buf, len, &ret) == NULL)
|
|
return ret;
|
|
#elif defined(HAVE_GETHOSTBYNAME_R_3)
|
|
/* e.g. HP/UX, AIX */
|
|
if((hostname == NULL) || (hp == NULL))
|
|
return -1;
|
|
if(gethostbyname_r(hostname, &hp, (struct hostent_data *)buf) < 0)
|
|
return h_errno;
|
|
#else
|
|
/* Single thread the code */
|
|
struct hostent *hp2;
|
|
static pthread_mutex_t hostent_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
if((hostname == NULL) || (hp == NULL))
|
|
return -1;
|
|
|
|
pthread_mutex_lock(&hostent_mutex);
|
|
if((hp2 = gethostbyname(hostname)) == NULL) {
|
|
pthread_mutex_unlock(&hostent_mutex);
|
|
return h_errno;
|
|
}
|
|
memcpy(hp, hp2, sizeof(struct hostent));
|
|
pthread_mutex_unlock(&hostent_mutex);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Handle the -I flag
|
|
*/
|
|
static int
|
|
add_local_ip(char *address)
|
|
{
|
|
char *opt, *pref;
|
|
int preflen;
|
|
int retval;
|
|
struct in_addr ignoreIP;
|
|
#ifdef AF_INET6
|
|
struct in6_addr ignoreIP6;
|
|
#endif
|
|
|
|
opt = cli_strdup(address);
|
|
if(opt == NULL)
|
|
return 0;
|
|
|
|
pref = strchr(opt, '/'); /* search for "/prefix" */
|
|
if(pref)
|
|
*pref = '\0';
|
|
#ifdef HAVE_INET_NTOP
|
|
/* IPv4 address ? */
|
|
if(inet_pton(AF_INET, opt, &ignoreIP) > 0) {
|
|
#else
|
|
if(inet_aton(address, &ignoreIP)) {
|
|
#endif
|
|
struct cidr_net *net;
|
|
|
|
for(net = (struct cidr_net *)localNets; net->base; net++)
|
|
;
|
|
if(pref && *(pref+1))
|
|
preflen = atoi(pref+1);
|
|
else
|
|
preflen = 32;
|
|
|
|
net->base = ntohl(ignoreIP.s_addr);
|
|
net->mask = MAKEMASK(preflen);
|
|
|
|
retval = 1;
|
|
}
|
|
|
|
#ifdef HAVE_INET_NTOP
|
|
#ifdef AF_INET6
|
|
else if(inet_pton(AF_INET6, opt, &ignoreIP6) > 0) {
|
|
/* IPv6 address ? */
|
|
localNets6[localNets6_cnt].base = ignoreIP6;
|
|
|
|
if(pref && *(pref+1))
|
|
preflen = atoi (pref+1);
|
|
else
|
|
preflen = 128;
|
|
localNets6[localNets6_cnt].preflen = preflen;
|
|
localNets6_cnt++;
|
|
|
|
retval = 1;
|
|
}
|
|
#endif
|
|
#endif
|
|
else
|
|
retval = 0;
|
|
|
|
free(opt);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Determine if an IPv6 email address is "local". The address is the
|
|
* human readable version. Calls isLocalAddr if the given address is
|
|
* IPv4
|
|
*/
|
|
static int
|
|
isLocal(const char *addr)
|
|
{
|
|
struct in_addr ip;
|
|
#ifdef AF_INET6
|
|
struct in6_addr ip6;
|
|
#endif
|
|
|
|
#ifdef HAVE_INET_NTOP
|
|
if(inet_pton(AF_INET, addr, &ip) > 0)
|
|
return isLocalAddr (ip.s_addr);
|
|
#ifdef AF_INET6
|
|
else if(inet_pton (AF_INET6, addr, &ip6) > 0) {
|
|
int i;
|
|
const cidr_net6 *pnet6 = localNets6;
|
|
|
|
for (i = 0; i < localNets6_cnt; i++) {
|
|
int match = 1;
|
|
int j;
|
|
|
|
for(j = 0; match && j < (pnet6->preflen >> 3); j++)
|
|
if(pnet6->base.s6_addr[j] != ip6.s6_addr[j])
|
|
match = 0;
|
|
if(match && (j < 16)) {
|
|
uint8_t mask = (uint8_t)(0xff << (8 - (pnet6->preflen & 7)) & 0xFF);
|
|
|
|
if((pnet6->base.s6_addr[j] & mask) != (ip6.s6_addr[j] & mask))
|
|
match = 0;
|
|
}
|
|
if(match)
|
|
return 1; /* isLocal */
|
|
pnet6++;
|
|
}
|
|
}
|
|
return 0;
|
|
#endif /* AF_INET6 */
|
|
#else
|
|
return isLocalAddr(inet_addr(addr));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* David Champion <dgc@uchicago.edu>
|
|
*
|
|
* Check whether addr is on network by applying netmasks.
|
|
* addr must be a 32-bit integer-packed IPv4 address in network order.
|
|
* For example:
|
|
* struct in_addr IPAddress;
|
|
* isLocal = isLocalAddr(IPAddress.s_addr);
|
|
*/
|
|
static int
|
|
isLocalAddr(in_addr_t addr)
|
|
{
|
|
const struct cidr_net *net;
|
|
|
|
for(net = localNets; net->base; net++)
|
|
if((net->base & net->mask) == (ntohl(addr) & net->mask))
|
|
return 1;
|
|
|
|
return 0; /* is non-local */
|
|
}
|
|
|
|
/*
|
|
* Can't connect to any clamd server. This is serious, we need to inform
|
|
* someone. In the absence of SNMP the best way is by e-mail. We
|
|
* don't want to flood so there's a need to restrict to
|
|
* no more than say one message every 15 minutes
|
|
*/
|
|
static void
|
|
clamdIsDown(void)
|
|
{
|
|
static time_t lasttime;
|
|
time_t thistime, diff;
|
|
static pthread_mutex_t time_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
logg(_("!No response from any clamd server - your AV system is not scanning emails\n"));
|
|
|
|
time(&thistime);
|
|
pthread_mutex_lock(&time_mutex);
|
|
diff = thistime - lasttime;
|
|
pthread_mutex_unlock(&time_mutex);
|
|
|
|
if(diff >= (time_t)(15 * 60)) {
|
|
char cmd[128];
|
|
FILE *sendmail;
|
|
|
|
snprintf(cmd, sizeof(cmd) - 1, "%s -t -i", SENDMAIL_BIN);
|
|
|
|
sendmail = popen(cmd, "w");
|
|
|
|
if(sendmail) {
|
|
fprintf(sendmail, "To: %s\n", postmaster);
|
|
fprintf(sendmail, "From: %s\n", postmaster);
|
|
fputs(_("Subject: ClamAV Down\n"), sendmail);
|
|
fputs("Priority: High\n\n", sendmail);
|
|
|
|
fputs(_("This is an automatic message\n\n"), sendmail);
|
|
|
|
if(numServers == 1)
|
|
fputs(_("The clamd program cannot be contacted.\n"), sendmail);
|
|
else
|
|
fputs(_("No clamd server can be contacted.\n"), sendmail);
|
|
|
|
fputs(_("Emails may not be being scanned, please check your servers.\n"), sendmail);
|
|
|
|
if(pclose(sendmail) == 0) {
|
|
pthread_mutex_lock(&time_mutex);
|
|
time(&lasttime);
|
|
pthread_mutex_unlock(&time_mutex);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef SESSION
|
|
/*
|
|
* Thread to monitor the links to clamd sessions. Any marked as being in
|
|
* an error state because of previous I/O errors are restarted, and a heartbeat
|
|
* is sent the others
|
|
*
|
|
* It is woken up when the milter goes idle, when there are no free servers
|
|
* available and once every readTimeout-1 seconds
|
|
*
|
|
* TODO: reload the whiteList file if it's been changed
|
|
*
|
|
* TODO: localSocket support
|
|
*/
|
|
static void *
|
|
watchdog(void *a)
|
|
{
|
|
static pthread_mutex_t watchdog_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
while(!quitting) {
|
|
unsigned int i;
|
|
struct timespec ts;
|
|
struct timeval tp;
|
|
struct session *session;
|
|
|
|
gettimeofday(&tp, NULL);
|
|
|
|
ts.tv_sec = tp.tv_sec + freshclam_monitor;
|
|
ts.tv_nsec = tp.tv_usec * 1000;
|
|
cli_dbgmsg("watchdog sleeps\n");
|
|
pthread_mutex_lock(&watchdog_mutex);
|
|
/*
|
|
* Sometimes this returns EPIPE which isn't listed as a
|
|
* return value in the Linux man page for pthread_cond_timedwait
|
|
* so I'm not sure why it happens
|
|
*/
|
|
switch(pthread_cond_timedwait(&watchdog_cond, &watchdog_mutex, &ts)) {
|
|
case ETIMEDOUT:
|
|
case 0:
|
|
break;
|
|
default:
|
|
perror("pthread_cond_timedwait");
|
|
}
|
|
pthread_mutex_unlock(&watchdog_mutex);
|
|
cli_dbgmsg("watchdog wakes\n");
|
|
|
|
if(check_and_reload_database() != 0) {
|
|
if(cl_error != SMFIS_ACCEPT) {
|
|
smfi_stop();
|
|
return NULL;
|
|
}
|
|
logg(_("!No emails will be scanned"));
|
|
}
|
|
|
|
i = 0;
|
|
session = sessions;
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
for(; i < max_children; i++, session++) {
|
|
const int sock = session->sock;
|
|
|
|
/*
|
|
* Check all free sessions are still usable
|
|
* This could take some time with many free
|
|
* sessions to slow remote servers, so only do this
|
|
* when the system is quiet (not 100% accurate when
|
|
* determining this since n_children isn't locked but
|
|
* that doesn't really matter)
|
|
*/
|
|
cli_dbgmsg("watchdog: check server %d\n", i);
|
|
if((n_children == 0) &&
|
|
(session->status == CMDSOCKET_FREE) &&
|
|
(clamav_versions != NULL)) {
|
|
if(send(sock, "VERSION\n", 8, 0) == 8) {
|
|
char buf[81];
|
|
const int nbytes = clamd_recv(sock, buf, sizeof(buf) - 1);
|
|
|
|
if(nbytes <= 0)
|
|
session->status = CMDSOCKET_DOWN;
|
|
else {
|
|
buf[nbytes] = '\0';
|
|
if(strncmp(buf, "ClamAV ", 7) == 0) {
|
|
/* Remove the trailing new line from the reply */
|
|
char *ptr;
|
|
|
|
if((ptr = strchr(buf, '\n')) != NULL)
|
|
*ptr = '\0';
|
|
pthread_mutex_lock(&version_mutex);
|
|
if(clamav_versions[i] == NULL)
|
|
clamav_versions[i] = cli_strdup(buf);
|
|
else if(strcmp(buf, clamav_versions[i]) != 0) {
|
|
logg("New version received for server %d: '%s'\n", i, buf);
|
|
free(clamav_versions[i]);
|
|
clamav_versions[i] = cli_strdup(buf);
|
|
}
|
|
pthread_mutex_unlock(&version_mutex);
|
|
} else {
|
|
cli_warnmsg("watchdog: expected \"ClamAV\", got \"%s\"\n", buf);
|
|
session->status = CMDSOCKET_DOWN;
|
|
}
|
|
}
|
|
} else {
|
|
perror("send");
|
|
session->status = CMDSOCKET_DOWN;
|
|
}
|
|
|
|
if(session->status == CMDSOCKET_DOWN)
|
|
cli_warnmsg("Session %d has gone down\n", i);
|
|
}
|
|
/*
|
|
* Reset all all dead sessions
|
|
*/
|
|
if(session->status == CMDSOCKET_DOWN) {
|
|
/*
|
|
* The END command probably won't get through,
|
|
* but let's give it a go anyway
|
|
*/
|
|
if(sock >= 0) {
|
|
send(sock, "END\n", 4, 0);
|
|
close(sock);
|
|
}
|
|
|
|
cli_dbgmsg("Trying to restart session %d\n", i);
|
|
if(createSession(i) == 0) {
|
|
session->status = CMDSOCKET_FREE;
|
|
cli_warnmsg("Session %d restarted OK\n", i);
|
|
}
|
|
}
|
|
}
|
|
for(i = 0; i < max_children; i++)
|
|
if(sessions[i].status != CMDSOCKET_DOWN)
|
|
break;
|
|
|
|
if(i == max_children)
|
|
clamdIsDown();
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
|
|
/* Garbage collect IP addresses no longer blacklisted */
|
|
if(blacklist) {
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
tableIterate(blacklist, timeoutBlacklist, NULL);
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
}
|
|
}
|
|
cli_dbgmsg("watchdog quits\n");
|
|
return NULL;
|
|
}
|
|
#else /*!SESSION*/
|
|
/*
|
|
* Reload the database from time to time, when using the internal scanner
|
|
*
|
|
* TODO: reload the whiteList file if it's been changed
|
|
*/
|
|
/*ARGSUSED*/
|
|
static void *
|
|
watchdog(void *a)
|
|
{
|
|
static pthread_mutex_t watchdog_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
if((!blacklist_time) && external)
|
|
return NULL; /* no need for this thread */
|
|
|
|
while(!quitting) {
|
|
struct timespec ts;
|
|
struct timeval tp;
|
|
|
|
gettimeofday(&tp, NULL);
|
|
|
|
ts.tv_sec = tp.tv_sec + freshclam_monitor;
|
|
ts.tv_nsec = tp.tv_usec * 1000;
|
|
cli_dbgmsg("watchdog sleeps\n");
|
|
pthread_mutex_lock(&watchdog_mutex);
|
|
/*
|
|
* Sometimes this returns EPIPE which isn't listed as a
|
|
* return value in the Linux man page for pthread_cond_timedwait
|
|
* so I'm not sure why it happens
|
|
*/
|
|
switch(pthread_cond_timedwait(&watchdog_cond, &watchdog_mutex, &ts)) {
|
|
case ETIMEDOUT:
|
|
case 0:
|
|
break;
|
|
default:
|
|
perror("pthread_cond_timedwait");
|
|
}
|
|
pthread_mutex_unlock(&watchdog_mutex);
|
|
cli_dbgmsg("watchdog wakes\n");
|
|
|
|
/*
|
|
* TODO: sanity check that if n_children == 0, that
|
|
* root->refcount == 0. Unfortunatly root->refcount isn't
|
|
* thread-safe, since it's governed by a mutex that we can't
|
|
* see, and there's no access to it via an approved method
|
|
*/
|
|
if(check_and_reload_database() != 0) {
|
|
if(cl_error != SMFIS_ACCEPT) {
|
|
smfi_stop();
|
|
return NULL;
|
|
}
|
|
logg(_("!No emails will be scanned"));
|
|
}
|
|
/* Garbage collect IP addresses no longer blacklisted */
|
|
if(blacklist) {
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
tableIterate(blacklist, timeoutBlacklist, NULL);
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
}
|
|
}
|
|
cli_dbgmsg("watchdog quits\n");
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Check to see if the database needs to be reloaded
|
|
* Return 0 for success
|
|
*/
|
|
static int
|
|
check_and_reload_database(void)
|
|
{
|
|
int rc;
|
|
|
|
if(external)
|
|
return 0;
|
|
|
|
switch(rc = cl_statchkdir(&dbstat)) {
|
|
case 1:
|
|
logg("^Database has changed, loading updated database\n");
|
|
cl_statfree(&dbstat);
|
|
rc = loadDatabase();
|
|
if(rc != 0) {
|
|
logg("!Failed to load updated database\n");
|
|
return rc;
|
|
}
|
|
break;
|
|
case 0:
|
|
logg("*Database has not changed\n");
|
|
break;
|
|
default:
|
|
logg("Database error %d - %s is stopping\n",
|
|
rc, progname);
|
|
return 1;
|
|
}
|
|
return 0; /* all OK */
|
|
}
|
|
|
|
static void
|
|
timeoutBlacklist(char *ip_address, int time_of_blacklist, void *v)
|
|
{
|
|
if(time_of_blacklist == 0) /* Must not blacklist this IP address */
|
|
return;
|
|
if((time((time_t *)0) - time_of_blacklist) > blacklist_time)
|
|
tableRemove(blacklist, ip_address);
|
|
}
|
|
|
|
static void
|
|
quit(void)
|
|
{
|
|
quitting++;
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&version_mutex);
|
|
#endif
|
|
logg(_("Stopping %s\n"), clamav_version);
|
|
#ifdef SESSION
|
|
pthread_mutex_unlock(&version_mutex);
|
|
#endif
|
|
|
|
if(!external) {
|
|
pthread_mutex_lock(&root_mutex);
|
|
if(root) {
|
|
cl_free(root);
|
|
root = NULL;
|
|
}
|
|
pthread_mutex_unlock(&root_mutex);
|
|
} else {
|
|
#ifdef SESSION
|
|
int i = 0;
|
|
struct session *session = sessions;
|
|
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
for(; i < ((localSocket != NULL) ? 1 : (int)max_children); i++) {
|
|
/*
|
|
* Check all free sessions are still usable
|
|
* This could take some time with many free
|
|
* sessions to slow remote servers, so only do this
|
|
* when the system is quiet (not 100% accurate when
|
|
* determining this since n_children isn't locked but
|
|
* that doesn't really matter)
|
|
*/
|
|
cli_dbgmsg("quit: close server %d\n", i);
|
|
if(session->status == CMDSOCKET_FREE) {
|
|
const int sock = session->sock;
|
|
|
|
send(sock, "END\n", 4, 0);
|
|
shutdown(sock, SHUT_WR);
|
|
session->status = CMDSOCKET_DOWN;
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
close(sock);
|
|
pthread_mutex_lock(&sstatus_mutex);
|
|
}
|
|
session++;
|
|
}
|
|
pthread_mutex_unlock(&sstatus_mutex);
|
|
#endif
|
|
}
|
|
|
|
if(tmpdir && !cli_leavetemps_flag)
|
|
if(rmdir(tmpdir) < 0)
|
|
perror(tmpdir);
|
|
|
|
broadcast(_("Stopping clamav-milter"));
|
|
|
|
if(pidfile)
|
|
if(unlink(pidfile) < 0)
|
|
perror(pidfile);
|
|
|
|
logg_close();
|
|
}
|
|
|
|
static void
|
|
broadcast(const char *mess)
|
|
{
|
|
struct sockaddr_in s;
|
|
|
|
if(broadcastSock < 0)
|
|
return;
|
|
|
|
memset(&s, '\0', sizeof(struct sockaddr_in));
|
|
s.sin_family = AF_INET;
|
|
s.sin_port = (in_port_t)htons(tcpSocket ? tcpSocket : 3310);
|
|
s.sin_addr.s_addr = htonl(INADDR_BROADCAST);
|
|
|
|
cli_dbgmsg("broadcast %s to %d\n", mess, broadcastSock);
|
|
if(sendto(broadcastSock, mess, strlen(mess), 0, (struct sockaddr *)&s, sizeof(struct sockaddr_in)) < 0)
|
|
perror("sendto");
|
|
}
|
|
|
|
/*
|
|
* Load a new database into the internal scanner
|
|
*/
|
|
static int
|
|
loadDatabase(void)
|
|
{
|
|
/*extern const char *cl_retdbdir(void); /* FIXME: should be included */
|
|
int ret;
|
|
unsigned int signatures, dboptions;
|
|
char *daily;
|
|
struct cl_cvd *d;
|
|
const struct cfgstruct *cpt;
|
|
struct cl_node *newroot, *oldroot;
|
|
static const char *dbdir;
|
|
|
|
assert(!external);
|
|
|
|
if(dbdir == NULL) {
|
|
/*
|
|
* First time through, find out in which directory the signature
|
|
* databases are
|
|
*/
|
|
if((cpt = cfgopt(copt, "DatabaseDirectory")) && cpt->enabled)
|
|
dbdir = cpt->strarg;
|
|
else
|
|
dbdir = cl_retdbdir();
|
|
}
|
|
|
|
daily = cli_malloc(strlen(dbdir) + 22);
|
|
sprintf(daily, "%s/daily.cvd", dbdir);
|
|
if(access(daily, R_OK) < 0)
|
|
sprintf(daily, "%s/daily.inc/daily.info", dbdir);
|
|
|
|
cli_dbgmsg("loadDatabase: check %s for updates\n", daily);
|
|
|
|
d = cl_cvdhead(daily);
|
|
|
|
if(d) {
|
|
char *ptr;
|
|
time_t t = d->stime;
|
|
#ifdef HAVE_CTIME_R
|
|
char buf[26];
|
|
|
|
#ifdef HAVE_CTIME_R_2
|
|
snprintf(clamav_version, VERSION_LENGTH,
|
|
"ClamAV %s/%u/%s", VERSION, d->version,
|
|
ctime_r(&t, buf));
|
|
#else
|
|
snprintf(clamav_version, VERSION_LENGTH,
|
|
"ClamAV %s/%d/%s", VERSION, d->version,
|
|
ctime_r(&t, buf, sizeof(buf)));
|
|
#endif
|
|
#else
|
|
snprintf(clamav_version, VERSION_LENGTH,
|
|
"ClamAV %s/%d/%s", VERSION, d->version, ctime(&t));
|
|
#endif
|
|
|
|
/* Remove ctime's trailing \n */
|
|
if((ptr = strchr(clamav_version, '\n')) != NULL)
|
|
*ptr = '\0';
|
|
|
|
cl_cvdfree(d);
|
|
} else
|
|
/* TODO: use dbdir/daily.inc/daily.info */
|
|
snprintf(clamav_version, VERSION_LENGTH,
|
|
"ClamAV version %s, clamav-milter version %s",
|
|
VERSION, CM_VERSION);
|
|
|
|
free(daily);
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&version_mutex);
|
|
if(clamav_versions == NULL) {
|
|
clamav_versions = (char **)cli_malloc(sizeof(char *));
|
|
if(clamav_versions == NULL) {
|
|
pthread_mutex_unlock(&version_mutex);
|
|
return -1;
|
|
}
|
|
clamav_version = cli_malloc(VERSION_LENGTH + 1);
|
|
if(clamav_version == NULL) {
|
|
free(clamav_versions);
|
|
clamav_versions = NULL;
|
|
pthread_mutex_unlock(&version_mutex);
|
|
return -1;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&version_mutex);
|
|
#endif
|
|
signatures = 0;
|
|
newroot = NULL;
|
|
|
|
if(!cfgopt(copt, "PhishingSignatures")->enabled) {
|
|
logg("Not loading phishing signatures.\n");
|
|
dboptions = 0;
|
|
} else
|
|
dboptions = CL_DB_PHISHING;
|
|
|
|
ret = cl_load(dbdir, &newroot, &signatures, dboptions);
|
|
if(ret != 0) {
|
|
logg("!%s\n", cl_strerror(ret));
|
|
return -1;
|
|
}
|
|
if(newroot == NULL) {
|
|
logg("!Can't initialize the virus database.\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = cl_build(newroot);
|
|
if(ret != 0) {
|
|
logg("!Database initialization error: %s\n", cl_strerror(ret));
|
|
cl_free(newroot);
|
|
return -1;
|
|
}
|
|
pthread_mutex_lock(&root_mutex);
|
|
oldroot = root;
|
|
root = newroot;
|
|
pthread_mutex_unlock(&root_mutex);
|
|
|
|
#ifdef SESSION
|
|
pthread_mutex_lock(&version_mutex);
|
|
#endif
|
|
logg( _("Loaded %s\n"), clamav_version);
|
|
#ifdef SESSION
|
|
pthread_mutex_unlock(&version_mutex);
|
|
#endif
|
|
logg(_("ClamAV: Protecting against %u viruses\n"), signatures);
|
|
if(oldroot) {
|
|
cl_free(oldroot);
|
|
logg("#Database correctly reloaded (%u viruses)\n", signatures);
|
|
} else
|
|
cli_dbgmsg("Database loaded\n");
|
|
|
|
return cl_statinidir(dbdir, &dbstat);
|
|
}
|
|
|
|
static void
|
|
sigsegv(int sig)
|
|
{
|
|
signal(SIGSEGV, SIG_DFL);
|
|
|
|
#ifdef HAVE_BACKTRACE
|
|
print_trace();
|
|
#endif
|
|
|
|
logg("!Segmentation fault :-( Bye..\n");
|
|
|
|
smfi_stop();
|
|
}
|
|
|
|
#ifdef HAVE_BACKTRACE
|
|
static void
|
|
print_trace(void)
|
|
{
|
|
void *array[BACKTRACE_SIZE];
|
|
size_t size, i;
|
|
char **strings;
|
|
pid_t pid = getpid();
|
|
|
|
size = backtrace(array, BACKTRACE_SIZE);
|
|
strings = backtrace_symbols(array, size);
|
|
|
|
cli_dbgmsg("Backtrace of pid %d:\n", pid);
|
|
|
|
for(i = 0; i < size; i++)
|
|
logg("bt[%u]: %s", i, strings[i]);
|
|
|
|
/* TODO: dump the current email */
|
|
|
|
free(strings);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Check that the correct port name has been given, i.e. that the
|
|
* input socket to clamav-milter from sendmail, is the same that
|
|
* sendmail has been configured to use as it's output socket
|
|
* Return: <0 invalid
|
|
* =0 valid
|
|
* >0 unknown
|
|
*
|
|
* You wouldn't believe the amount of time I used to waste chasing bug reports
|
|
* from people who's sendmail.cf didn't tally with the arguments given to
|
|
* clamav-milter before I put this check in!
|
|
*/
|
|
static int
|
|
verifyIncomingSocketName(const char *sockName)
|
|
{
|
|
#if HAVE_MMAP
|
|
int fd, ret;
|
|
char *ptr;
|
|
size_t size;
|
|
struct stat statb;
|
|
|
|
if(strncmp(sockName, "inet:", 5) == 0)
|
|
/*
|
|
* clamav-milter is running on a different machine from sendmail
|
|
*/
|
|
return 1;
|
|
|
|
if(sendmailCF)
|
|
fd = open(sendmailCF, O_RDONLY);
|
|
else {
|
|
fd = open("/etc/mail/sendmail.cf", O_RDONLY);
|
|
if(fd < 0)
|
|
fd = open("/etc/sendmail.cf", O_RDONLY);
|
|
}
|
|
|
|
if(fd < 0)
|
|
return 1;
|
|
|
|
if(fstat(fd, &statb) < 0) {
|
|
close(fd);
|
|
return 1;
|
|
}
|
|
|
|
size = statb.st_size;
|
|
|
|
if(size == 0) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
ptr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
|
|
if(ptr == MAP_FAILED) {
|
|
perror("mmap");
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
ret = (cli_memstr(ptr, size, sockName, strlen(sockName)) != NULL) ? 1 : -1;
|
|
|
|
munmap(ptr, size);
|
|
close(fd);
|
|
|
|
return ret;
|
|
#else /*!HAVE_MMAP*/
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* If the given email address is whitelisted don't scan emails to them,
|
|
* the addresses are in angle brackets e.g. <foo@bar.com>.
|
|
*
|
|
* TODO: Allow regular expressions in the addresses
|
|
* TODO: Syntax check the contents of the files
|
|
* TODO: Allow emails of the form "name <address>"
|
|
* TODO: Allow emails not of the form "<address>", i.e. no angle brackets
|
|
* TODO: Assume that if a '@' is missing from the address, that all emails
|
|
* to that domain are to be whitelisted
|
|
*/
|
|
static int
|
|
isWhitelisted(const char *emailaddress, int to)
|
|
{
|
|
static table_t *to_whitelist, *from_whitelist; /* never freed */
|
|
table_t *table;
|
|
|
|
cli_dbgmsg("isWhitelisted %s\n", emailaddress);
|
|
|
|
/*
|
|
* Don't scan messages to the quarantine email address
|
|
*/
|
|
if(quarantine && (strcasecmp(quarantine, emailaddress) == 0))
|
|
return 1;
|
|
|
|
if((to_whitelist == NULL) && whitelistFile) {
|
|
FILE *fin;
|
|
char buf[BUFSIZ + 1];
|
|
|
|
fin = fopen(whitelistFile, "r");
|
|
|
|
if(fin == NULL) {
|
|
perror(whitelistFile);
|
|
logg(_("!Can't open whitelist file %s"), whitelistFile);
|
|
return 0;
|
|
}
|
|
to_whitelist = tableCreate();
|
|
from_whitelist = tableCreate();
|
|
|
|
if((to_whitelist == NULL) || (from_whitelist == NULL)) {
|
|
logg(_("!Can't create whitelist table"));
|
|
if(to_whitelist) {
|
|
tableDestroy(to_whitelist);
|
|
to_whitelist = NULL;
|
|
} else {
|
|
tableDestroy(from_whitelist);
|
|
from_whitelist = NULL;
|
|
}
|
|
fclose(fin);
|
|
return 0;
|
|
}
|
|
|
|
while(fgets(buf, sizeof(buf), fin) != NULL) {
|
|
const char *ptr;
|
|
|
|
/* comment line? */
|
|
switch(buf[0]) {
|
|
case '#':
|
|
case '/':
|
|
case ':':
|
|
continue;
|
|
}
|
|
if(cli_chomp(buf) > 0) {
|
|
if((ptr = strchr(buf, ':')) != NULL) {
|
|
do
|
|
ptr++;
|
|
while(*ptr && isspace(*ptr));
|
|
|
|
if(*ptr == '\0') {
|
|
logg("*Ignoring bad line '%s'\n",
|
|
buf);
|
|
continue;
|
|
}
|
|
} else
|
|
ptr = buf;
|
|
|
|
if(strncasecmp(buf, "From:", 5) == 0)
|
|
table = from_whitelist;
|
|
else
|
|
table = to_whitelist;
|
|
|
|
(void)tableInsert(table, ptr, 1);
|
|
}
|
|
}
|
|
fclose(fin);
|
|
}
|
|
table = (to) ? to_whitelist : from_whitelist;
|
|
|
|
if(table && (tableFind(table, emailaddress) == 1))
|
|
/*
|
|
* This recipient is on the whitelist
|
|
*/
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Blacklist IP addresses that send malware. Often in the phishing world, one
|
|
* phish is quickly followed by another. IP addresses are blacklisted for one
|
|
* minute. We can't blacklist for longer since DHCP means we could hit innocent
|
|
* parties, and in theory malware could go through a smart host and affect
|
|
* innocent parties
|
|
*
|
|
* Note that sites which can't be blacklisted will have their timestamp set
|
|
* to 0, since that can never be less than blacklist_time seconds from now
|
|
*/
|
|
static int
|
|
isBlacklisted(const char *ip_address)
|
|
{
|
|
time_t t;
|
|
|
|
if(blacklist_time == 0)
|
|
/* Blacklisting not being used */
|
|
return 0;
|
|
|
|
cli_dbgmsg("isBlacklisted %s\n", ip_address);
|
|
|
|
if(isLocal(ip_address))
|
|
return 0;
|
|
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
if(blacklist == NULL) {
|
|
blacklist = tableCreate();
|
|
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
|
|
if(blacklist == NULL)
|
|
logg(_("!Can't create blacklist table"));
|
|
return 0;
|
|
}
|
|
t = tableFind(blacklist, ip_address);
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
|
|
if(t == (time_t)-1)
|
|
/* IP address is not blacklisted */
|
|
return 0;
|
|
|
|
if(t == (time_t)0)
|
|
/* IP cannot be blacklisted */
|
|
return 0;
|
|
|
|
if((time((time_t *)0) - t) <= blacklist_time)
|
|
return 1;
|
|
|
|
/* timedout: remove the IP from the blacklist */
|
|
pthread_mutex_lock(&blacklist_mutex);
|
|
tableRemove(blacklist, ip_address);
|
|
pthread_mutex_unlock(&blacklist_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef HAVE_RESOLV_H
|
|
/*
|
|
* Determine our MX peers, they must never be blacklisted
|
|
* See RFC1034 for the definition of the record formats
|
|
*
|
|
* This is only ever called once, which is wrong, but the overheard of calling
|
|
* this from the watchdog isn't worth it
|
|
*/
|
|
static table_t *
|
|
mx(const char *host, table_t *t)
|
|
{
|
|
u_char *p, *end;
|
|
const HEADER *hp;
|
|
int len, i;
|
|
union {
|
|
HEADER h;
|
|
u_char u[PACKETSZ];
|
|
} q;
|
|
char buf[BUFSIZ];
|
|
|
|
if(t == NULL) {
|
|
t = tableCreate();
|
|
|
|
if(t == NULL)
|
|
return NULL;
|
|
}
|
|
|
|
len = res_query(host, C_IN, T_MX, (u_char *)&q, sizeof(q));
|
|
if(len < 0)
|
|
return t; /* Host has no MX records */
|
|
|
|
if((unsigned int)len > sizeof(q))
|
|
return t;
|
|
|
|
hp = &(q.h);
|
|
p = q.u + HFIXEDSZ;
|
|
end = q.u + len;
|
|
|
|
for(i = ntohs(hp->qdcount); i--; p += len + QFIXEDSZ)
|
|
if((len = dn_skipname(p, end)) < 0)
|
|
return t;
|
|
|
|
i = ntohs(hp->ancount);
|
|
|
|
while((--i >= 0) && (p < end)) {
|
|
in_addr_t addr;
|
|
u_short type, pref;
|
|
u_long ttl; /* unused */
|
|
|
|
if((len = dn_expand(q.u, end, p, buf, sizeof(buf) - 1)) < 0)
|
|
break;
|
|
p += len;
|
|
GETSHORT(type, p);
|
|
p += INT16SZ;
|
|
GETLONG(ttl, p);
|
|
GETSHORT(len, p);
|
|
if(type != T_MX) {
|
|
p += len;
|
|
continue;
|
|
}
|
|
GETSHORT(pref, p);
|
|
if((len = dn_expand(q.u, end, p, buf, sizeof(buf) - 1)) < 0)
|
|
break;
|
|
p += len;
|
|
addr = inet_addr(buf);
|
|
#ifdef INADDR_NONE
|
|
if(addr != INADDR_NONE) {
|
|
#else
|
|
if(addr != (in_addr_t)-1) {
|
|
#endif
|
|
(void)tableInsert(t, buf, 0);
|
|
} else
|
|
t = resolve(buf, t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
/*
|
|
* If the MX record points to a name, we need to resolve that name. This routine
|
|
* does that
|
|
*/
|
|
static table_t *
|
|
resolve(const char *host, table_t *t)
|
|
{
|
|
u_char *p, *end;
|
|
const HEADER *hp;
|
|
int len, i;
|
|
union {
|
|
HEADER h;
|
|
u_char u[PACKETSZ];
|
|
} q;
|
|
char buf[BUFSIZ];
|
|
|
|
if((host == NULL) || (*host == '\0'))
|
|
return t;
|
|
|
|
len = res_query(host, C_IN, T_A, (u_char *)&q, sizeof(q));
|
|
if(len < 0)
|
|
return t; /* Host has no A records */
|
|
|
|
if((unsigned int)len > sizeof(q))
|
|
return t;
|
|
|
|
hp = &(q.h);
|
|
p = q.u + HFIXEDSZ;
|
|
end = q.u + len;
|
|
|
|
for(i = ntohs(hp->qdcount); i--; p += len + QFIXEDSZ)
|
|
if((len = dn_skipname(p, end)) < 0)
|
|
return t;
|
|
|
|
i = ntohs(hp->ancount);
|
|
|
|
while((--i >= 0) && (p < end)) {
|
|
u_short type;
|
|
u_long ttl;
|
|
const char *ip;
|
|
struct in_addr addr;
|
|
|
|
if((len = dn_expand(q.u, end, p, buf, sizeof(buf) - 1)) < 0)
|
|
return t;
|
|
p += len;
|
|
GETSHORT(type, p);
|
|
p += INT16SZ;
|
|
GETLONG(ttl, p); /* unused */
|
|
GETSHORT(len, p);
|
|
if(type != T_A) {
|
|
p += len;
|
|
continue;
|
|
}
|
|
memcpy(&addr, p, sizeof(struct in_addr));
|
|
p += 4; /* Should check len == 4 */
|
|
ip = inet_ntoa(addr);
|
|
if(ip) {
|
|
if(t == NULL) {
|
|
t = tableCreate();
|
|
|
|
if(t == NULL)
|
|
return NULL;
|
|
}
|
|
(void)tableInsert(t, ip, 0);
|
|
}
|
|
}
|
|
return t;
|
|
}
|
|
|
|
/*
|
|
* Validate SPF records to help to stop Phish false positives
|
|
* http://www.openspf.org/SPF_Record_Syntax
|
|
*
|
|
* Currently only handles ip4, a and mx fields in the DNS record
|
|
* Having said that, this is NOT a replacement for spf-milter, it is NOT
|
|
* an SPF system, we ONLY use SPF records to reduce phish false positives
|
|
* TODO: ptr
|
|
* TODO: IPv6?
|
|
* TODO: cache queries?
|
|
*
|
|
* INPUT: prevhosts, a list of hosts already searched: stops include loops
|
|
* e.g. mercado.com includes medrcadosw.com which includes mercado.com,
|
|
* causing a loop
|
|
* Return 1 if SPF says this email is from a legitimate source
|
|
* 0 for fail or unknown
|
|
*
|
|
* TODO: check res_query is thread safe
|
|
*/
|
|
static int
|
|
spf(struct privdata *privdata, table_t *prevhosts)
|
|
{
|
|
char *host, *ptr;
|
|
u_char *p, *end;
|
|
const HEADER *hp;
|
|
int len, i;
|
|
union {
|
|
HEADER h;
|
|
u_char u[PACKETSZ];
|
|
} q;
|
|
char buf[BUFSIZ];
|
|
|
|
if(privdata->spf_ok)
|
|
return 1;
|
|
if(privdata->ip[0] == '\0')
|
|
return 0;
|
|
if(strcmp(privdata->ip, "127.0.0.1") == 0) {
|
|
/* Loopback always pass SPF */
|
|
privdata->spf_ok = 1;
|
|
return 1;
|
|
}
|
|
if(isLocal(privdata->ip)) {
|
|
/* Local addresses always pass SPF */
|
|
privdata->spf_ok = 1;
|
|
return 1;
|
|
}
|
|
|
|
if(privdata->from == NULL)
|
|
return 0;
|
|
if((host = strchr(privdata->from, '@')) == NULL)
|
|
return 0;
|
|
|
|
host = cli_strdup(++host);
|
|
|
|
if(host == NULL)
|
|
return 0;
|
|
|
|
ptr = strchr(host, '>');
|
|
|
|
if(ptr)
|
|
*ptr = '\0';
|
|
|
|
len = res_query(host, C_IN, T_TXT, (u_char *)&q, sizeof(q));
|
|
if(len < 0) {
|
|
free(host);
|
|
return 0; /* Host has no TXT records */
|
|
}
|
|
|
|
if((unsigned int)len > sizeof(q)) {
|
|
free(host);
|
|
return 0;
|
|
}
|
|
|
|
hp = &(q.h);
|
|
p = q.u + HFIXEDSZ;
|
|
end = q.u + len;
|
|
|
|
for(i = ntohs(hp->qdcount); i--; p += len + QFIXEDSZ)
|
|
if((len = dn_skipname(p, end)) < 0) {
|
|
free(host);
|
|
return 0;
|
|
}
|
|
|
|
i = ntohs(hp->ancount);
|
|
|
|
while((--i >= 0) && (p < end) && !privdata->spf_ok) {
|
|
u_short type;
|
|
u_long ttl;
|
|
char txt[BUFSIZ];
|
|
|
|
if((len = dn_expand(q.u, end, p, buf, sizeof(buf) - 1)) < 0) {
|
|
free(host);
|
|
return 0;
|
|
}
|
|
p += len;
|
|
GETSHORT(type, p);
|
|
p += INT16SZ;
|
|
GETLONG(ttl, p); /* unused */
|
|
GETSHORT(len, p);
|
|
if(type != T_TXT) {
|
|
p += len;
|
|
continue;
|
|
}
|
|
strncpy(txt, (const char *)&p[1], sizeof(txt) - 1);
|
|
txt[len - 1] = '\0';
|
|
if((strncmp(txt, "v=spf1 ", 7) == 0) || (strncmp(txt, "spf2.0/pra ", 11) == 0)) {
|
|
int j;
|
|
char *record;
|
|
struct in_addr remote_ip; /* IP connecting to us */
|
|
|
|
logg("*%s(%s): SPF record %s\n",
|
|
host, privdata->ip, txt);
|
|
#ifdef HAVE_INET_NTOP
|
|
/* IPv4 address ? */
|
|
if(inet_pton(AF_INET, privdata->ip, &remote_ip) <= 0) {
|
|
p += len;
|
|
continue;
|
|
}
|
|
#else
|
|
if(inet_aton(privdata->ip, &remote_ip) == 0) {
|
|
p += len;
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
j = 1; /* strtok 0 would give the v= part */
|
|
while((record = cli_strtok(txt, j++, " ")) != NULL) {
|
|
if(strncmp(record, "ip4:", 4) == 0) {
|
|
int preflen;
|
|
char *ip, *pref;
|
|
uint32_t mask;
|
|
struct in_addr spf_range; /* acceptable range of IPs */
|
|
|
|
ip = &record[4];
|
|
|
|
pref = strchr(ip, '/');
|
|
preflen = 32;
|
|
if(pref) {
|
|
*pref++ = '\0';
|
|
if(*pref)
|
|
preflen = atoi(pref);
|
|
}
|
|
|
|
#ifdef HAVE_INET_NTOP
|
|
/* IPv4 address ? */
|
|
if(inet_pton(AF_INET, ip, &spf_range) <= 0) {
|
|
free(record);
|
|
continue;
|
|
}
|
|
#else
|
|
if(inet_aton(ip, &spf_range) == 0) {
|
|
free(record);
|
|
continue;
|
|
}
|
|
#endif
|
|
mask = MAKEMASK(preflen);
|
|
if((ntohl(remote_ip.s_addr) & mask) == (ntohl(spf_range.s_addr) & mask)) {
|
|
logg("#SPF ip4 pass\n");
|
|
privdata->spf_ok = 1;
|
|
}
|
|
} else if(strcmp(record, "mx") == 0) {
|
|
table_t *t = mx(host, NULL);
|
|
|
|
if(t) {
|
|
tableIterate(t, spf_ip,
|
|
(void *)privdata);
|
|
tableDestroy(t);
|
|
}
|
|
} else if(strcmp(record, "a") == 0) {
|
|
table_t *t = resolve(host, NULL);
|
|
|
|
if(t) {
|
|
tableIterate(t, spf_ip,
|
|
(void *)privdata);
|
|
tableDestroy(t);
|
|
}
|
|
} else if(strncmp(record, "a:", 2) == 0) {
|
|
const char *ahost = &record[2];
|
|
|
|
if(*ahost && (strcmp(ahost, host) != 0)) {
|
|
table_t *t = resolve(ahost, NULL);
|
|
|
|
if(t) {
|
|
tableIterate(t, spf_ip,
|
|
(void *)privdata);
|
|
tableDestroy(t);
|
|
}
|
|
}
|
|
} else if(strncmp(record, "mx:", 3) == 0) {
|
|
const char *mxhost = &record[3];
|
|
|
|
if(*mxhost && (strcmp(mxhost, host) != 0)) {
|
|
table_t *t = mx(mxhost, NULL);
|
|
|
|
if(t) {
|
|
tableIterate(t, spf_ip,
|
|
(void *)privdata);
|
|
tableDestroy(t);
|
|
}
|
|
}
|
|
} else if(strncmp(record, "include:", 8) == 0) {
|
|
const char *inchost = &record[8];
|
|
|
|
/*
|
|
* Ensure we haven't already looked at
|
|
* the host that's to be included
|
|
*/
|
|
if(*inchost &&
|
|
(strcmp(inchost, host) != 0) &&
|
|
(tableFind(prevhosts, inchost) == -1)) {
|
|
char *real_from = privdata->from;
|
|
privdata->from = cli_malloc(strlen(inchost) + 3);
|
|
sprintf(privdata->from, "n@%s", inchost);
|
|
tableInsert(prevhosts, host, 0);
|
|
spf(privdata, prevhosts);
|
|
free(privdata->from);
|
|
privdata->from = real_from;
|
|
}
|
|
}
|
|
free(record);
|
|
if(privdata->spf_ok)
|
|
break;
|
|
}
|
|
}
|
|
p += len;
|
|
}
|
|
free(host);
|
|
|
|
return privdata->spf_ok;
|
|
}
|
|
|
|
static void
|
|
spf_ip(char *ip, int zero, void *v)
|
|
{
|
|
struct privdata *privdata = (struct privdata *)v;
|
|
|
|
if(strcmp(ip, privdata->ip) == 0) {
|
|
logg("#SPF mx/a pass %s\n", ip);
|
|
privdata->spf_ok = 1;
|
|
}
|
|
}
|
|
|
|
#else /*!HAVE_RESOLV_H */
|
|
static void
|
|
mx(void)
|
|
{
|
|
logg(_("^MX peers will not be immune from being blacklisted"));
|
|
|
|
if(blacklist == NULL)
|
|
blacklist = tableCreate();
|
|
}
|
|
#endif /* HAVE_RESOLV_H */
|
|
|
|
static sfsistat
|
|
black_hole(const struct privdata *privdata)
|
|
{
|
|
int must_scan;
|
|
char **to;
|
|
|
|
to = privdata->to;
|
|
must_scan = (*to) ? 0 : 1;
|
|
|
|
for(; *to; to++) {
|
|
pid_t pid, w;
|
|
int pv[2], status;
|
|
FILE *sendmail;
|
|
char buf[BUFSIZ];
|
|
|
|
cli_dbgmsg("Calling \"%s -bv %s\"\n", SENDMAIL_BIN, *to);
|
|
|
|
if(pipe(pv) < 0) {
|
|
perror("pipe");
|
|
logg(_("!Can't create pipe\n"));
|
|
must_scan = 1;
|
|
break;
|
|
}
|
|
pid = fork();
|
|
if(pid == 0) {
|
|
close(1);
|
|
close(pv[0]);
|
|
dup2(pv[1], 1);
|
|
close(pv[1]);
|
|
|
|
/*
|
|
* Avoid calling popen() since *to isn't trusted
|
|
*/
|
|
execl(SENDMAIL_BIN, "sendmail", "-bv", *to, NULL);
|
|
perror(SENDMAIL_BIN);
|
|
logg("Can't execl %s\n", SENDMAIL_BIN);
|
|
_exit(errno ? errno : 1);
|
|
}
|
|
if(pid == -1) {
|
|
perror("fork");
|
|
logg(_("!Can't fork\n"));
|
|
close(pv[0]);
|
|
close(pv[1]);
|
|
must_scan = 1;
|
|
break;
|
|
}
|
|
close(pv[1]);
|
|
sendmail = fdopen(pv[0], "r");
|
|
|
|
if(sendmail == NULL) {
|
|
logg("fdopen failed\n");
|
|
close(pv[0]);
|
|
must_scan = 1;
|
|
break;
|
|
}
|
|
|
|
while(fgets(buf, sizeof(buf), sendmail) != NULL) {
|
|
if(cli_chomp(buf) == 0)
|
|
continue;
|
|
|
|
cli_dbgmsg("sendmail output: %s\n", buf);
|
|
|
|
if(strstr(buf, "... deliverable: mailer ")) {
|
|
const char *p = strstr(buf, ", user ");
|
|
|
|
if(strcmp(&p[7], "/dev/null") != 0) {
|
|
must_scan = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
fclose(sendmail);
|
|
|
|
status = -1;
|
|
do
|
|
w = wait(&status);
|
|
while((w != pid) && (w != -1));
|
|
|
|
if(w == -1)
|
|
status = -1;
|
|
else
|
|
status = WEXITSTATUS(status);
|
|
|
|
switch(status) {
|
|
case EX_NOUSER:
|
|
case EX_OK:
|
|
break;
|
|
default:
|
|
logg(_("^Can't execute '%s' to expand '%s' (error %d)\n"),
|
|
SENDMAIL_BIN, *to, WEXITSTATUS(status));
|
|
must_scan = 1;
|
|
}
|
|
if(must_scan)
|
|
break;
|
|
}
|
|
if(!must_scan) {
|
|
/* All recipients map to /dev/null */
|
|
to = privdata->to;
|
|
if(*to)
|
|
logg("Discarded, since all recipients (e.g. \"%s\") are /dev/null\n", *to);
|
|
else
|
|
logg("Discarded, since all recipients are /dev/null\n");
|
|
return SMFIS_DISCARD;
|
|
}
|
|
return SMFIS_CONTINUE;
|
|
}
|
|
|
|
/* See also libclamav/mbox.c */
|
|
static int
|
|
useful_header(const char *cmd)
|
|
{
|
|
if(strcasecmp(cmd, "From") == 0)
|
|
return 1;
|
|
if(strcasecmp(cmd, "Received") == 0)
|
|
return 1;
|
|
if(strcasecmp(cmd, "Content-Type") == 0)
|
|
return 1;
|
|
if(strcasecmp(cmd, "Content-Transfer-Encoding") == 0)
|
|
return 1;
|
|
if(strcasecmp(cmd, "Content-Disposition") == 0)
|
|
return 1;
|
|
if(strcasecmp(cmd, "De") == 0)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
increment_connexions(void)
|
|
{
|
|
if(max_children > 0) {
|
|
int rc = 0;
|
|
|
|
pthread_mutex_lock(&n_children_mutex);
|
|
|
|
/*
|
|
* Wait a while since sendmail doesn't like it if we
|
|
* take too long replying. Effectively this means that
|
|
* max_children is more of a hint than a rule
|
|
*/
|
|
if(n_children >= max_children) {
|
|
struct timespec timeout;
|
|
struct timeval now;
|
|
struct timezone tz;
|
|
|
|
logg((dont_wait) ?
|
|
_("hit max-children limit (%u >= %u)\n") :
|
|
_("hit max-children limit (%u >= %u): waiting for some to exit\n"),
|
|
n_children, max_children);
|
|
|
|
if(dont_wait) {
|
|
pthread_mutex_unlock(&n_children_mutex);
|
|
return 0;
|
|
}
|
|
/*
|
|
* Wait for an amount of time for a child to go
|
|
*
|
|
* Use pthread_cond_timedwait rather than
|
|
* pthread_cond_wait since the sendmail which
|
|
* calls us will have a timeout that we don't
|
|
* want to exceed, stops sendmail getting
|
|
* fidgety.
|
|
*
|
|
* Patch from Damian Menscher
|
|
* <menscher@uiuc.edu> to ensure it wakes up
|
|
* when a child goes away
|
|
*/
|
|
gettimeofday(&now, &tz);
|
|
do {
|
|
logg(_("n_children %d: waiting %d seconds for some to exit\n"),
|
|
n_children, child_timeout);
|
|
|
|
if(child_timeout == 0) {
|
|
pthread_cond_wait(&n_children_cond, &n_children_mutex);
|
|
rc = 0;
|
|
} else {
|
|
timeout.tv_sec = now.tv_sec + child_timeout;
|
|
timeout.tv_nsec = 0;
|
|
|
|
rc = pthread_cond_timedwait(&n_children_cond, &n_children_mutex, &timeout);
|
|
}
|
|
} while((n_children >= max_children) && (rc != ETIMEDOUT));
|
|
logg(_("Finished waiting, n_children = %d\n"), n_children);
|
|
}
|
|
n_children++;
|
|
|
|
cli_dbgmsg(">n_children = %d\n", n_children);
|
|
pthread_mutex_unlock(&n_children_mutex);
|
|
|
|
if(child_timeout && (rc == ETIMEDOUT))
|
|
logg(_("*Timeout waiting for a child to die\n"));
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
decrement_connexions(void)
|
|
{
|
|
if(max_children > 0) {
|
|
pthread_mutex_lock(&n_children_mutex);
|
|
cli_dbgmsg("decrement_connexions: n_children = %d\n", n_children);
|
|
/*
|
|
* Deliberately errs on the side of broadcasting too many times
|
|
*/
|
|
if(n_children > 0)
|
|
if(--n_children == 0) {
|
|
cli_dbgmsg("%s is idle\n", progname);
|
|
if(pthread_cond_broadcast(&watchdog_cond) < 0)
|
|
perror("pthread_cond_broadcast");
|
|
}
|
|
#ifdef CL_DEBUG
|
|
cli_dbgmsg("pthread_cond_broadcast\n");
|
|
#endif
|
|
if(pthread_cond_broadcast(&n_children_cond) < 0)
|
|
perror("pthread_cond_broadcast");
|
|
cli_dbgmsg("<n_children = %d\n", n_children);
|
|
pthread_mutex_unlock(&n_children_mutex);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dump_blacklist(char *key, int value, void *v)
|
|
{
|
|
logg(_("Won't blacklist %s\n"), key);
|
|
}
|
|
|