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296 lines
6.8 KiB
296 lines
6.8 KiB
/*
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* Copyright (C) 2007 Tomasz Kojm <tkojm@clamav.net>
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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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#ifdef _MSC_VER
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#include <winsock.h>
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#endif
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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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#ifdef C_WINDOWS
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#define _USE_32BIT_TIME_T /* FIXME: mirdat.atime assumes 32bit time_t */
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#endif
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#include <stdio.h>
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#include <string.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 <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <time.h>
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#ifndef C_WINDOWS
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#endif
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#include "mirman.h"
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#include "libclamav/cltypes.h"
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#include "libclamav/clamav.h"
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#include "shared/output.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef HAVE_GETADDRINFO
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#ifndef AF_INET6
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#define AF_INET6 0xbeef /* foo */
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#endif
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#endif
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#define IGNORE_LONG 3 * 86400
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#define IGNORE_SHORT 1800
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void mirman_free(struct mirdat *mdat)
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{
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if(mdat && mdat->num) {
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free(mdat->mirtab);
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mdat->num = 0;
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}
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}
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int mirman_read(const char *file, struct mirdat *mdat, uint8_t active)
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{
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struct mirdat_ip mip;
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int fd, bread;
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memset(mdat, 0, sizeof(struct mirdat));
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if(!(mdat->active = active))
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return 0;
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if((fd = open(file, O_RDONLY|O_BINARY)) == -1)
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return -1;
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while((bread = read(fd, &mip, sizeof(mip))) == sizeof(mip)) {
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mdat->mirtab = (struct mirdat_ip *) realloc(mdat->mirtab, (mdat->num + 1) * sizeof(mip));
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if(!mdat->mirtab) {
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logg("!Can't allocate memory for mdat->mirtab\n");
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mirman_free(mdat);
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close(fd);
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return -1;
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}
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memcpy(&mdat->mirtab[mdat->num], &mip, sizeof(mip));
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mdat->num++;
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}
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close(fd);
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if(bread) {
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logg("^Removing broken %s file.\n", file);
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unlink(file);
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mirman_free(mdat);
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return -1;
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}
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return 0;
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}
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int mirman_check(uint32_t *ip, int af, struct mirdat *mdat, struct mirdat_ip **md)
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{
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unsigned int i, flevel = cl_retflevel();
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if(md)
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*md = NULL;
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if(!mdat->active)
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return 0;
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for(i = 0; i < mdat->num; i++) {
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if((af == AF_INET && mdat->mirtab[i].ip4 == *ip) || (af == AF_INET6 && !memcmp(mdat->mirtab[i].ip6, ip, 4 * sizeof(uint32_t)))) {
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if(!mdat->mirtab[i].atime && !mdat->mirtab[i].ignore) {
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if(md)
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*md = &mdat->mirtab[i];
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return 0;
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}
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if(mdat->dbflevel && (mdat->dbflevel > flevel) && (mdat->dbflevel - flevel > 3))
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if(time(NULL) - mdat->mirtab[i].atime < 4 * 3600)
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return 2;
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if(mdat->mirtab[i].ignore) {
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if(!mdat->mirtab[i].atime)
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return 1;
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if(time(NULL) - mdat->mirtab[i].atime > IGNORE_LONG) {
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mdat->mirtab[i].ignore = 0;
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if(md)
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*md = &mdat->mirtab[i];
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return 0;
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} else {
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if(mdat->mirtab[i].ignore == 2 && (time(NULL) - mdat->mirtab[i].atime > IGNORE_SHORT)) {
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if(md)
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*md = &mdat->mirtab[i];
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return 0;
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}
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return 1;
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}
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}
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if(md)
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*md = &mdat->mirtab[i];
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return 0;
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}
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}
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return 0;
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}
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int mirman_update(uint32_t *ip, int af, struct mirdat *mdat, uint8_t broken)
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{
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unsigned int i, found = 0;
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if(!mdat->active)
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return 0;
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for(i = 0; i < mdat->num; i++) {
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if((af == AF_INET && mdat->mirtab[i].ip4 == *ip) || (af == AF_INET6 && !memcmp(mdat->mirtab[i].ip6, ip, 4 * sizeof(uint32_t)))) {
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found = 1;
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break;
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}
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}
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if(found) {
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mdat->mirtab[i].atime = 0; /* will be updated in mirman_write() */
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if(broken)
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mdat->mirtab[i].fail++;
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else
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mdat->mirtab[i].succ++;
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if(broken == 2) {
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mdat->mirtab[i].ignore = 2;
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} else {
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/*
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* If the total number of failures is less than 3 then never
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* mark a permanent failure, in other case use the real status.
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*/
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if(mdat->mirtab[i].fail < 3)
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mdat->mirtab[i].ignore = 0;
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else
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mdat->mirtab[i].ignore = broken;
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}
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} else {
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mdat->mirtab = (struct mirdat_ip *) realloc(mdat->mirtab, (mdat->num + 1) * sizeof(struct mirdat_ip));
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if(!mdat->mirtab) {
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logg("!Can't allocate memory for new element in mdat->mirtab\n");
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return -1;
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}
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if(af == AF_INET) {
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mdat->mirtab[mdat->num].ip4 = *ip;
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} else {
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mdat->mirtab[mdat->num].ip4 = 0;
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memcpy(mdat->mirtab[mdat->num].ip6, ip, 4 * sizeof(uint32_t));
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}
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mdat->mirtab[mdat->num].atime = 0;
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mdat->mirtab[mdat->num].succ = 0;
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mdat->mirtab[mdat->num].fail = 0;
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mdat->mirtab[mdat->num].ignore = (broken == 2) ? 2 : 0;
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memset(&mdat->mirtab[mdat->num].res, 0xff, sizeof(mdat->mirtab[mdat->num].res));
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if(broken)
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mdat->mirtab[mdat->num].fail++;
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else
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mdat->mirtab[mdat->num].succ++;
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mdat->num++;
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}
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return 0;
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}
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void mirman_list(const struct mirdat *mdat)
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{
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unsigned int i;
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time_t tm;
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char ip[46];
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for(i = 0; i < mdat->num; i++) {
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printf("Mirror #%u\n", i + 1);
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#ifdef HAVE_GETADDRINFO
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if(mdat->mirtab[i].ip4)
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printf("IP: %s\n", inet_ntop(AF_INET, &mdat->mirtab[i].ip4, ip, sizeof(ip)));
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else
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printf("IP: %s\n", inet_ntop(AF_INET6, mdat->mirtab[i].ip6, ip, sizeof(ip)));
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#else
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if(mdat->mirtab[i].ip4)
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printf("IP: %s\n", inet_ntoa(*(struct in_addr*) &mdat->mirtab[i].ip4));
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#endif
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printf("Successes: %u\n", mdat->mirtab[i].succ);
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printf("Failures: %u\n", mdat->mirtab[i].fail);
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tm = mdat->mirtab[i].atime;
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printf("Last access: %s", ctime((const time_t *)&tm));
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printf("Ignore: %s\n", mdat->mirtab[i].ignore ? "Yes" : "No");
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if(i != mdat->num - 1)
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printf("-------------------------------------\n");
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}
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}
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void mirman_whitelist(struct mirdat *mdat, unsigned int mode)
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{
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unsigned int i;
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logg("*Whitelisting %s blacklisted mirrors\n", mode == 1 ? "all" : "short-term");
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for(i = 0; i < mdat->num; i++)
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if(mode == 1 || (mode == 2 && mdat->mirtab[i].ignore == 2))
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mdat->mirtab[i].ignore = 0;
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}
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int mirman_write(const char *file, struct mirdat *mdat)
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{
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int fd;
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unsigned int i;
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if(!mdat->num)
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return 0;
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if((fd = open(file, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0600)) == -1) {
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logg("!Can't open %s for writing\n", file);
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mirman_free(mdat);
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return -1;
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}
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for(i = 0; i < mdat->num; i++)
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if(!mdat->mirtab[i].atime)
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mdat->mirtab[i].atime = (uint32_t) time(NULL);
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if(write(fd, mdat->mirtab, mdat->num * sizeof(struct mirdat_ip)) == -1) {
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logg("!Can't write to %s\n", file);
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mirman_free(mdat);
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close(fd);
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return -1;
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}
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mirman_free(mdat);
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close(fd);
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return 0;
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}
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