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329 lines
8.9 KiB
329 lines
8.9 KiB
/*
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* Copyright (C) 2009 Sourcefire, Inc.
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*
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* Authors: Tomasz Kojm, aCaB
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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 version 2 as
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* published by the Free Software Foundation.
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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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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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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 <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef HAVE_SYS_LIMITS_H
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#include <sys/limits.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#ifndef _WIN32
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <utime.h>
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#endif
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#include <errno.h>
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#include <dirent.h>
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#include <fcntl.h>
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#ifdef HAVE_SYS_UIO_H
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#include <sys/uio.h>
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#endif
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include "libclamav/crypto.h"
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#include "shared/optparser.h"
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#include "shared/output.h"
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#include "shared/misc.h"
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#include "shared/actions.h"
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#include "shared/clamdcom.h"
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#include "libclamav/str.h"
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#include "libclamav/others.h"
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#include "client.h"
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#include "proto.h"
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unsigned long int maxstream;
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#ifndef _WIN32
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struct sockaddr_un nixsock;
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#endif
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extern struct optstruct *clamdopts;
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/* Inits the communication layer
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* Returns 0 if clamd is local, non zero if clamd is remote */
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static int isremote(const struct optstruct *opts) {
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int s, ret;
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const struct optstruct *opt;
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static struct sockaddr_in testsock;
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char *ipaddr, port[10];
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struct addrinfo hints, *info, *p;
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int res;
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#ifndef _WIN32
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if((opt = optget(clamdopts, "LocalSocket"))->enabled) {
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memset((void *)&nixsock, 0, sizeof(nixsock));
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nixsock.sun_family = AF_UNIX;
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strncpy(nixsock.sun_path, opt->strarg, sizeof(nixsock.sun_path));
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nixsock.sun_path[sizeof(nixsock.sun_path)-1]='\0';
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return 0;
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}
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#endif
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if(!(opt = optget(clamdopts, "TCPSocket"))->enabled)
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return 0;
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snprintf(port, sizeof(port), "%lld", optget(clamdopts, "TCPSocket")->numarg);
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opt = optget(clamdopts, "TCPAddr");
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while (opt) {
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if (opt->enabled)
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ipaddr = (!strcmp(opt->strarg, "any") ? NULL : opt->strarg);
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else
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ipaddr = NULL;
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memset(&hints, 0x00, sizeof(struct addrinfo));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_PASSIVE;
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if ((res = getaddrinfo(ipaddr, port, &hints, &info))) {
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logg("!Can't lookup clamd hostname: %s\n", gai_strerror(res));
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continue;
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}
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for (p = info; p != NULL; p = p->ai_next) {
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if((s = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) < 0) {
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logg("isremote: socket() returning: %s.\n", strerror(errno));
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continue;
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}
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switch (p->ai_family) {
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case AF_INET:
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((struct sockaddr_in *)(p->ai_addr))->sin_port = htons(INADDR_ANY);
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break;
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case AF_INET6:
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((struct sockaddr_in6 *)(p->ai_addr))->sin6_port = htons(INADDR_ANY);
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break;
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default:
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break;
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}
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ret = bind(s, p->ai_addr, p->ai_addrlen);
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if (ret) {
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if (errno == EADDRINUSE) {
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/*
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* If we can't bind, then either we're attempting to listen on an IP that isn't
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* ours or that clamd is already listening on.
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*/
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closesocket(s);
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freeaddrinfo(info);
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return 0;
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}
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closesocket(s);
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freeaddrinfo(info);
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return 1;
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}
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closesocket(s);
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}
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freeaddrinfo(info);
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opt = opt->nextarg;
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}
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return 0;
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}
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/* Turns a relative path into an absolute one
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* Returns a pointer to the path (which must be
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* freed by the caller) or NULL on error */
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static char *makeabs(const char *basepath) {
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int namelen;
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char *ret;
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if(!(ret = malloc(PATH_MAX + 1))) {
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logg("^Can't make room for fullpath.\n");
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return NULL;
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}
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if(!cli_is_abspath(basepath)) {
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if(!getcwd(ret, PATH_MAX)) {
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logg("^Can't get absolute pathname of current working directory.\n");
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free(ret);
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return NULL;
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}
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#ifdef _WIN32
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if(*basepath == '\\') {
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namelen = 2;
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basepath++;
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} else
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#endif
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namelen = strlen(ret);
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snprintf(&ret[namelen], PATH_MAX - namelen, PATHSEP"%s", basepath);
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} else {
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strncpy(ret, basepath, PATH_MAX);
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}
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ret[PATH_MAX] = '\0';
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return ret;
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}
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/* Recursively scans a path with the given scantype
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* Returns non zero for serious errors, zero otherwise */
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static int client_scan(const char *file, int scantype, int *infected, int *err, int maxlevel, int session, int flags) {
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int ret;
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char *fullpath = makeabs(file);
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if(!fullpath)
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return 0;
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if (!session)
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ret = serial_client_scan(fullpath, scantype, infected, err, maxlevel, flags);
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else
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ret = parallel_client_scan(fullpath, scantype, infected, err, maxlevel, flags);
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free(fullpath);
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return ret;
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}
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int get_clamd_version(const struct optstruct *opts)
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{
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char *buff;
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int len, sockd;
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struct RCVLN rcv;
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isremote(opts);
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if((sockd = dconnect()) < 0) return 2;
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recvlninit(&rcv, sockd);
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if(sendln(sockd, "zVERSION", 9)) {
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closesocket(sockd);
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return 2;
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}
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while((len = recvln(&rcv, &buff, NULL))) {
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if(len == -1) {
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logg("!Error occoured while receiving version information.\n");
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break;
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}
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printf("%s\n", buff);
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}
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closesocket(sockd);
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return 0;
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}
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int reload_clamd_database(const struct optstruct *opts)
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{
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char *buff;
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int len, sockd;
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struct RCVLN rcv;
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isremote(opts);
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if((sockd = dconnect()) < 0) return 2;
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recvlninit(&rcv, sockd);
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if(sendln(sockd, "zRELOAD", 8)) {
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closesocket(sockd);
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return 2;
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}
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if(!(len = recvln(&rcv, &buff, NULL)) || len < 10 || memcmp(buff, "RELOADING", 9)) {
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logg("!Clamd did not reload the database\n");
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closesocket(sockd);
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return 2;
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}
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closesocket(sockd);
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return 0;
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}
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int client(const struct optstruct *opts, int *infected, int *err)
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{
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int remote, scantype, session = 0, errors = 0, scandash = 0, maxrec, flags = 0;
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const char *fname;
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scandash = (opts->filename && opts->filename[0] && !strcmp(opts->filename[0], "-") && !optget(opts, "file-list")->enabled && !opts->filename[1]);
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remote = isremote(opts) | optget(opts, "stream")->enabled;
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#ifdef HAVE_FD_PASSING
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if(!remote && optget(clamdopts, "LocalSocket")->enabled && (optget(opts, "fdpass")->enabled || scandash)) {
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scantype = FILDES;
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session = optget(opts, "multiscan")->enabled;
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} else
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#endif
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if(remote || scandash) {
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scantype = STREAM;
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session = optget(opts, "multiscan")->enabled;
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}
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else if(optget(opts, "multiscan")->enabled) scantype = MULTI;
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else if(optget(opts, "allmatch")->enabled) scantype = ALLMATCH;
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else scantype = CONT;
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maxrec = optget(clamdopts, "MaxDirectoryRecursion")->numarg;
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maxstream = optget(clamdopts, "StreamMaxLength")->numarg;
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if (optget(clamdopts, "FollowDirectorySymlinks")->enabled)
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flags |= CLI_FTW_FOLLOW_DIR_SYMLINK;
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if (optget(clamdopts, "FollowFileSymlinks")->enabled)
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flags |= CLI_FTW_FOLLOW_FILE_SYMLINK;
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flags |= CLI_FTW_TRIM_SLASHES;
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*infected = 0;
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if(scandash) {
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int sockd, ret;
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STATBUF sb;
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if(FSTAT(0, &sb) < 0) {
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logg("client.c: fstat failed for file name \"%s\", with %s\n.",
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opts->filename[0], strerror(errno));
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return 2;
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}
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if((sb.st_mode & S_IFMT) != S_IFREG) scantype = STREAM;
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if((sockd = dconnect()) >= 0 && (ret = dsresult(sockd, scantype, NULL, &ret, NULL)) >= 0)
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*infected = ret;
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else
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errors = 1;
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if(sockd >= 0) closesocket(sockd);
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} else if(opts->filename || optget(opts, "file-list")->enabled) {
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if(opts->filename && optget(opts, "file-list")->enabled)
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logg("^Only scanning files from --file-list (files passed at cmdline are ignored)\n");
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while((fname = filelist(opts, NULL))) {
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if(!strcmp(fname, "-")) {
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logg("!Scanning from standard input requires \"-\" to be the only file argument\n");
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continue;
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}
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errors += client_scan(fname, scantype, infected, err, maxrec, session, flags);
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/* this may be too strict
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if(errors >= 10) {
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logg("!Too many errors\n");
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break;
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}
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*/
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}
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} else {
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errors = client_scan("", scantype, infected, err, maxrec, session, flags);
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}
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return *infected ? 1 : (errors ? 2 : 0);
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}
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