1 /* $Cambridge: exim/src/src/malware.c,v 1.16 2008/03/27 13:16:52 tom Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
10 /* Code for calling virus (malware) scanners. Called from acl.c. */
13 #ifdef WITH_CONTENT_SCAN
15 /* declaration of private routines */
16 int mksd_scan_packed(int sock);
18 /* SHUT_WR seems to be undefined on Unixware? */
24 #define MALWARE_TIMEOUT 120
27 #define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */
28 #define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */
29 #define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */
31 #define DERR_READ_ERR (1<<0) /* read error */
32 #define DERR_NOMEMORY (1<<2) /* no memory */
33 #define DERR_TIMEOUT (1<<9) /* scan timeout has run out */
34 #define DERR_BAD_CALL (1<<15) /* wrong command */
36 /* Routine to check whether a system is big- or litte-endian.
37 Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html
38 Needed for proper kavdaemon implementation. Sigh. */
39 #define BIG_MY_ENDIAN 0
40 #define LITTLE_MY_ENDIAN 1
41 int test_byte_order(void);
42 int test_byte_order() {
43 short int word = 0x0001;
44 char *byte = (char *) &word;
45 return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN);
48 uschar malware_name_buffer[256];
51 int malware(uschar **listptr) {
53 uschar *list = *listptr;
54 uschar *av_scanner_work = av_scanner;
56 uschar scanner_name_buffer[16];
57 uschar *malware_regex;
58 uschar malware_regex_buffer[64];
59 uschar malware_regex_default[] = ".+";
60 unsigned long mbox_size;
66 /* make sure the eml mbox file is spooled up */
67 mbox_file = spool_mbox(&mbox_size);
68 if (mbox_file == NULL) {
69 /* error while spooling */
70 log_write(0, LOG_MAIN|LOG_PANIC,
71 "malware acl condition: error while creating mbox spool file");
74 /* none of our current scanners need the mbox
75 file as a stream, so we can close it right away */
76 (void)fclose(mbox_file);
78 /* extract the malware regex to match against from the option list */
79 if ((malware_regex = string_nextinlist(&list, &sep,
81 sizeof(malware_regex_buffer))) != NULL) {
83 /* parse 1st option */
84 if ( (strcmpic(malware_regex,US"false") == 0) ||
85 (Ustrcmp(malware_regex,"0") == 0) ) {
86 /* explicitly no matching */
90 /* special cases (match anything except empty) */
91 if ( (strcmpic(malware_regex,US"true") == 0) ||
92 (Ustrcmp(malware_regex,"*") == 0) ||
93 (Ustrcmp(malware_regex,"1") == 0) ) {
94 malware_regex = malware_regex_default;
98 /* empty means "don't match anything" */
102 /* Reset sep that is set by previous string_nextinlist() call */
105 /* compile the regex, see if it works */
106 re = pcre_compile(CS malware_regex, PCRE_COPT, (const char **)&rerror, &roffset, NULL);
108 log_write(0, LOG_MAIN|LOG_PANIC,
109 "malware acl condition: regular expression error in '%s': %s at offset %d", malware_regex, rerror, roffset);
113 /* if av_scanner starts with a dollar, expand it first */
114 if (*av_scanner == '$') {
115 av_scanner_work = expand_string(av_scanner);
116 if (av_scanner_work == NULL) {
117 log_write(0, LOG_MAIN|LOG_PANIC,
118 "malware acl condition: av_scanner starts with $, but expansion failed: %s", expand_string_message);
122 debug_printf("Expanded av_scanner global: %s\n", av_scanner_work);
123 /* disable result caching in this case */
129 /* Do not scan twice. */
130 if (malware_ok == 0) {
132 /* find the scanner type from the av_scanner option */
133 if ((scanner_name = string_nextinlist(&av_scanner_work, &sep,
135 sizeof(scanner_name_buffer))) == NULL) {
136 /* no scanner given */
137 log_write(0, LOG_MAIN|LOG_PANIC,
138 "malware acl condition: av_scanner configuration variable is empty");
142 /* "f-protd" scanner type ----------------------------------------------- */
143 if (strcmpic(scanner_name, US"f-protd") == 0) {
144 uschar *fp_options, *fp_scan_option;
145 uschar fp_scan_option_buffer[1024];
146 uschar fp_options_buffer[1024];
147 uschar fp_options_default[] = "localhost 10200-10204";
148 uschar hostname[256];
149 unsigned int port, portlow, porthigh, connect_ok=0, detected=0, par_count = 0;
153 uschar scanrequest[2048], buf[32768], *strhelper, *strhelper2;
155 if ((fp_options = string_nextinlist(&av_scanner_work, &sep,
156 fp_options_buffer, sizeof(fp_options_buffer))) == NULL) {
157 /* no options supplied, use default options */
158 fp_options = fp_options_default;
161 /* extract host and port part */
162 if ( sscanf(CS fp_options, "%s %u-%u", hostname, &portlow, &porthigh) != 3 ) {
163 if ( sscanf(CS fp_options, "%s %u", hostname, &portlow) != 2 ) {
164 log_write(0, LOG_MAIN|LOG_PANIC,
165 "malware acl condition: f-protd: invalid socket '%s'", fp_options);
171 /* Lookup the host */
172 if((he = gethostbyname(CS hostname)) == 0) {
173 log_write(0, LOG_MAIN|LOG_PANIC,
174 "malware acl condition: f-protd: failed to lookup host '%s'", hostname);
178 in = *(struct in_addr *) he->h_addr_list[0];
182 /* Open the f-protd TCP socket */
183 if ( (sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
184 log_write(0, LOG_MAIN|LOG_PANIC,
185 "malware acl condition: f-protd: unable to acquire socket (%s)",
190 /* Try to connect to all portslow-high until connection is established */
191 for (port = portlow; !connect_ok && port < porthigh; port++) {
192 if (ip_connect(sock, AF_INET, (uschar*)inet_ntoa(in), port, 5) >= 0) {
198 log_write(0, LOG_MAIN|LOG_PANIC,
199 "malware acl condition: f-protd: connection to %s, port %u-%u failed (%s)",
200 inet_ntoa(in), portlow, porthigh, strerror(errno));
205 (void)string_format(scanrequest, 1024, CS"GET %s/scan/%s/%s.eml",
206 spool_directory, message_id, message_id);
208 while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep,
209 fp_scan_option_buffer, sizeof(fp_scan_option_buffer))) != NULL) {
211 Ustrcat(scanrequest, "%20");
213 Ustrcat(scanrequest, "?");
215 Ustrcat(scanrequest, fp_scan_option);
218 Ustrcat(scanrequest, " HTTP/1.0\r\n\r\n");
220 /* send scan request */
221 if (send(sock, &scanrequest, Ustrlen(scanrequest)+1, 0) < 0) {
223 log_write(0, LOG_MAIN|LOG_PANIC,
224 "malware acl condition: f-protd: unable to send command to socket (%s)", scanrequest);
228 /* We get a lot of empty lines, so we need this hack to check for any data at all */
229 while( recv(sock, buf, 1, MSG_PEEK) > 0 ) {
230 if ( recv_line(sock, buf, 32768) > 0) {
231 if ( Ustrstr(buf, US"<detected type=\"") != NULL ) {
233 } else if ( detected && (strhelper = Ustrstr(buf, US"<name>")) ) {
234 if (strhelper2 = Ustrstr(buf, US"</name>")) {
236 Ustrcpy(malware_name_buffer, strhelper + 6);
238 } else if ( Ustrstr(buf, US"<summary code=\"") ) {
239 if ( Ustrstr(buf, US"<summary code=\"11\">") ) {
240 malware_name = malware_name_buffer;
249 /* "drweb" scanner type ----------------------------------------------- */
250 /* v0.1 - added support for tcp sockets */
251 /* v0.0 - initial release -- support for unix sockets */
252 else if (strcmpic(scanner_name,US"drweb") == 0) {
253 uschar *drweb_options;
254 uschar drweb_options_buffer[1024];
255 uschar drweb_options_default[] = "/usr/local/drweb/run/drwebd.sock";
256 struct sockaddr_un server;
257 int sock, result, ovector[30];
258 unsigned int port, fsize;
259 uschar tmpbuf[1024], *drweb_fbuf;
260 uschar scanrequest[1024];
261 uschar drweb_match_string[128];
262 int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd,
263 drweb_vnum, drweb_slen, drweb_fin = 0x0000;
265 uschar hostname[256];
270 if ((drweb_options = string_nextinlist(&av_scanner_work, &sep,
271 drweb_options_buffer, sizeof(drweb_options_buffer))) == NULL) {
272 /* no options supplied, use default options */
273 drweb_options = drweb_options_default;
276 if (*drweb_options != '/') {
278 /* extract host and port part */
279 if( sscanf(CS drweb_options, "%s %u", hostname, &port) != 2 ) {
280 log_write(0, LOG_MAIN|LOG_PANIC,
281 "malware acl condition: drweb: invalid socket '%s'", drweb_options);
285 /* Lookup the host */
286 if((he = gethostbyname(CS hostname)) == 0) {
287 log_write(0, LOG_MAIN|LOG_PANIC,
288 "malware acl condition: drweb: failed to lookup host '%s'", hostname);
292 in = *(struct in_addr *) he->h_addr_list[0];
294 /* Open the drwebd TCP socket */
295 if ( (sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
296 log_write(0, LOG_MAIN|LOG_PANIC,
297 "malware acl condition: drweb: unable to acquire socket (%s)",
302 if (ip_connect(sock, AF_INET, (uschar*)inet_ntoa(in), port, 5) < 0) {
304 log_write(0, LOG_MAIN|LOG_PANIC,
305 "malware acl condition: drweb: connection to %s, port %u failed (%s)",
306 inet_ntoa(in), port, strerror(errno));
310 /* prepare variables */
311 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
312 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
313 (void)string_format(scanrequest, 1024,CS"%s/scan/%s/%s.eml",
314 spool_directory, message_id, message_id);
317 drweb_fd = open(CS scanrequest, O_RDONLY);
318 if (drweb_fd == -1) {
320 log_write(0, LOG_MAIN|LOG_PANIC,
321 "malware acl condition: drweb: can't open spool file %s: %s",
322 scanrequest, strerror(errno));
325 fsize = lseek(drweb_fd, 0, SEEK_END);
328 (void)close(drweb_fd);
329 log_write(0, LOG_MAIN|LOG_PANIC,
330 "malware acl condition: drweb: can't seek spool file %s: %s",
331 scanrequest, strerror(errno));
334 drweb_slen = htonl(fsize);
335 lseek(drweb_fd, 0, SEEK_SET);
337 /* send scan request */
338 if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
339 (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
340 (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) ||
341 (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0)) {
343 (void)close(drweb_fd);
344 log_write(0, LOG_MAIN|LOG_PANIC,
345 "malware acl condition: drweb: unable to send commands to socket (%s)", drweb_options);
349 drweb_fbuf = (uschar *) malloc (fsize);
352 (void)close(drweb_fd);
353 log_write(0, LOG_MAIN|LOG_PANIC,
354 "malware acl condition: drweb: unable to allocate memory %u for file (%s)",
359 result = read (drweb_fd, drweb_fbuf, fsize);
362 (void)close(drweb_fd);
364 log_write(0, LOG_MAIN|LOG_PANIC,
365 "malware acl condition: drweb: can't read spool file %s: %s",
366 scanrequest, strerror(errno));
369 (void)close(drweb_fd);
371 /* send file body to socket */
372 if (send(sock, drweb_fbuf, fsize, 0) < 0) {
375 log_write(0, LOG_MAIN|LOG_PANIC,
376 "malware acl condition: drweb: unable to send file body to socket (%s)", drweb_options);
379 (void)close(drweb_fd);
382 /* open the drwebd UNIX socket */
383 sock = socket(AF_UNIX, SOCK_STREAM, 0);
385 log_write(0, LOG_MAIN|LOG_PANIC,
386 "malware acl condition: drweb: can't open UNIX socket");
389 server.sun_family = AF_UNIX;
390 Ustrcpy(server.sun_path, drweb_options);
391 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
393 log_write(0, LOG_MAIN|LOG_PANIC,
394 "malware acl condition: drweb: unable to connect to socket (%s). errno=%d", drweb_options, errno);
398 /* prepare variables */
399 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
400 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
401 (void)string_format(scanrequest, 1024,CS"%s/scan/%s/%s.eml", spool_directory, message_id, message_id);
402 drweb_slen = htonl(Ustrlen(scanrequest));
404 /* send scan request */
405 if ((send(sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
406 (send(sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
407 (send(sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) ||
408 (send(sock, scanrequest, Ustrlen(scanrequest), 0) < 0) ||
409 (send(sock, &drweb_fin, sizeof(drweb_fin), 0) < 0)) {
411 log_write(0, LOG_MAIN|LOG_PANIC,
412 "malware acl condition: drweb: unable to send commands to socket (%s)", drweb_options);
417 /* wait for result */
418 if ((bread = recv(sock, &drweb_rc, sizeof(drweb_rc), 0) != sizeof(drweb_rc))) {
420 log_write(0, LOG_MAIN|LOG_PANIC,
421 "malware acl condition: drweb: unable to read return code");
424 drweb_rc = ntohl(drweb_rc);
426 if ((bread = recv(sock, &drweb_vnum, sizeof(drweb_vnum), 0) != sizeof(drweb_vnum))) {
428 log_write(0, LOG_MAIN|LOG_PANIC,
429 "malware acl condition: drweb: unable to read the number of viruses");
432 drweb_vnum = ntohl(drweb_vnum);
434 /* "virus(es) found" if virus number is > 0 */
438 uschar pre_malware_nb[256];
440 malware_name = malware_name_buffer;
442 /* setup default virus name */
443 Ustrcpy(malware_name_buffer,"unknown");
445 /* read and concatenate virus names into one string */
446 for (i=0;i<drweb_vnum;i++)
448 /* read the size of report */
449 if ((bread = recv(sock, &drweb_slen, sizeof(drweb_slen), 0) != sizeof(drweb_slen))) {
451 log_write(0, LOG_MAIN|LOG_PANIC,
452 "malware acl condition: drweb: cannot read report size");
455 drweb_slen = ntohl(drweb_slen);
457 /* read report body */
458 if ((bread = recv(sock, tmpbuf, drweb_slen, 0)) != drweb_slen) {
460 log_write(0, LOG_MAIN|LOG_PANIC,
461 "malware acl condition: drweb: cannot read report string");
464 tmpbuf[drweb_slen] = '\0';
466 /* set up match regex, depends on retcode */
467 Ustrcpy(drweb_match_string, "infected\\swith\\s*(.+?)$");
469 drweb_re = pcre_compile( CS drweb_match_string,
471 (const char **)&rerror,
475 /* try matcher on the line, grab substring */
476 result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0, ovector, 30);
478 pcre_copy_substring(CS tmpbuf, ovector, result, 1, CS pre_malware_nb, 255);
480 /* the first name we just copy to malware_name */
482 Ustrcpy(CS malware_name_buffer, CS pre_malware_nb);
484 /* concatenate each new virus name to previous */
485 int slen = Ustrlen(malware_name_buffer);
486 if (slen < (slen+Ustrlen(pre_malware_nb))) {
487 Ustrcat(malware_name_buffer, "/");
488 Ustrcat(malware_name_buffer, pre_malware_nb);
494 char *drweb_s = NULL;
496 if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
497 if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
498 if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout";
499 if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
500 /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
501 * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
502 * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
503 * and others are ignored */
505 log_write(0, LOG_MAIN|LOG_PANIC,
506 "malware acl condition: drweb: drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s);
515 /* ----------------------------------------------------------------------- */
516 else if (strcmpic(scanner_name,US"aveserver") == 0) {
518 uschar kav_options_buffer[1024];
519 uschar kav_options_default[] = "/var/run/aveserver";
521 struct sockaddr_un server;
525 if ((kav_options = string_nextinlist(&av_scanner_work, &sep,
527 sizeof(kav_options_buffer))) == NULL) {
528 /* no options supplied, use default options */
529 kav_options = kav_options_default;
532 /* open the aveserver socket */
533 sock = socket(AF_UNIX, SOCK_STREAM, 0);
535 log_write(0, LOG_MAIN|LOG_PANIC,
536 "malware acl condition: can't open UNIX socket.");
539 server.sun_family = AF_UNIX;
540 Ustrcpy(server.sun_path, kav_options);
541 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
543 log_write(0, LOG_MAIN|LOG_PANIC,
544 "malware acl condition: unable to connect to aveserver UNIX socket (%s). errno=%d", kav_options, errno);
548 /* read aveserver's greeting and see if it is ready (2xx greeting) */
549 recv_line(sock, buf, 32768);
552 /* aveserver is having problems */
554 log_write(0, LOG_MAIN|LOG_PANIC,
555 "malware acl condition: aveserver is unavailable (Responded: %s).", ((buf[0] != 0) ? buf : (uschar *)"nothing") );
559 /* prepare our command */
560 (void)string_format(buf, 32768, "SCAN bPQRSTUW %s/scan/%s/%s.eml\r\n", spool_directory, message_id, message_id);
563 if (send(sock, buf, Ustrlen(buf), 0) < 0) {
565 log_write(0, LOG_MAIN|LOG_PANIC,
566 "malware acl condition: unable to write to aveserver UNIX socket (%s)", kav_options);
572 /* read response lines, find malware name and final response */
573 while (recv_line(sock, buf, 32768) > 0) {
574 debug_printf("aveserver: %s\n", buf);
577 } else if (buf[0] == '5') {
578 /* aveserver is having problems */
579 log_write(0, LOG_MAIN|LOG_PANIC,
580 "malware acl condition: unable to scan file %s/scan/%s/%s.eml (Responded: %s).",
581 spool_directory, message_id, message_id, buf);
584 } else if (Ustrncmp(buf,"322",3) == 0) {
585 uschar *p = Ustrchr(&buf[4],' ');
587 Ustrcpy(malware_name_buffer,&buf[4]);
588 malware_name = malware_name_buffer;
592 /* prepare our command */
593 (void)string_format(buf, 32768, "quit\r\n");
596 if (send(sock, buf, Ustrlen(buf), 0) < 0) {
598 log_write(0, LOG_MAIN|LOG_PANIC,
599 "malware acl condition: unable to write to aveserver UNIX socket (%s)", kav_options);
603 /* read aveserver's greeting and see if it is ready (2xx greeting) */
604 recv_line(sock, buf, 32768);
607 /* aveserver is having problems */
609 log_write(0, LOG_MAIN|LOG_PANIC,
610 "malware acl condition: unable to quit aveserver dialogue (Responded: %s).", ((buf[0] != 0) ? buf : (uschar *)"nothing") );
616 if (result == DEFER) return DEFER;
618 /* "fsecure" scanner type ------------------------------------------------- */
619 else if (strcmpic(scanner_name,US"fsecure") == 0) {
620 uschar *fsecure_options;
621 uschar fsecure_options_buffer[1024];
622 uschar fsecure_options_default[] = "/var/run/.fsav";
623 struct sockaddr_un server;
624 int sock, i, j, bread = 0;
625 uschar file_name[1024];
626 uschar av_buffer[1024];
628 static uschar *cmdoptions[] = { US"CONFIGURE\tARCHIVE\t1\n",
629 US"CONFIGURE\tTIMEOUT\t0\n",
630 US"CONFIGURE\tMAXARCH\t5\n",
631 US"CONFIGURE\tMIME\t1\n" };
634 if ((fsecure_options = string_nextinlist(&av_scanner_work, &sep,
635 fsecure_options_buffer,
636 sizeof(fsecure_options_buffer))) == NULL) {
637 /* no options supplied, use default options */
638 fsecure_options = fsecure_options_default;
641 /* open the fsecure socket */
642 sock = socket(AF_UNIX, SOCK_STREAM, 0);
644 log_write(0, LOG_MAIN|LOG_PANIC,
645 "malware acl condition: unable to open fsecure socket %s (%s)",
646 fsecure_options, strerror(errno));
649 server.sun_family = AF_UNIX;
650 Ustrcpy(server.sun_path, fsecure_options);
651 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
653 log_write(0, LOG_MAIN|LOG_PANIC,
654 "malware acl condition: unable to connect to fsecure socket %s (%s)",
655 fsecure_options, strerror(errno));
660 memset(av_buffer, 0, sizeof(av_buffer));
661 for (i=0; i != 4; i++) {
662 /* debug_printf("send option \"%s\"",cmdoptions[i]); */
663 if (write(sock, cmdoptions[i], Ustrlen(cmdoptions[i])) < 0) {
665 log_write(0, LOG_MAIN|LOG_PANIC,
666 "malware acl condition: unable to write fsecure option %d to %s (%s)",
667 i, fsecure_options, strerror(errno));
671 bread = ip_recv(sock, av_buffer, sizeof(av_buffer), MALWARE_TIMEOUT);
672 if (bread >0) av_buffer[bread]='\0';
675 log_write(0, LOG_MAIN|LOG_PANIC,
676 "malware acl condition: unable to read fsecure answer %d (%s)", i, strerror(errno));
679 for (j=0;j<bread;j++) if((av_buffer[j]=='\r')||(av_buffer[j]=='\n')) av_buffer[j] ='@';
680 /* debug_printf("read answer %d read=%d \"%s\"\n", i, bread, av_buffer ); */
681 /* while (Ustrstr(av_buffer, "OK\tServer configured.@") == NULL); */
684 /* pass the mailfile to fsecure */
685 (void)string_format(file_name,1024,"SCAN\t%s/scan/%s/%s.eml\n", spool_directory, message_id, message_id);
686 /* debug_printf("send scan %s",file_name); */
687 if (write(sock, file_name, Ustrlen(file_name)) < 0) {
689 log_write(0, LOG_MAIN|LOG_PANIC,
690 "malware acl condition: unable to write fsecure scan to %s (%s)",
691 fsecure_options, strerror(errno));
696 /* todo also SUSPICION\t */
697 fs_inf = pcre_compile("\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$", PCRE_COPT, (const char **)&rerror, &roffset, NULL);
699 /* read report, linewise */
703 memset(av_buffer, 0, sizeof(av_buffer));
705 bread=ip_recv(sock, &av_buffer[i], 1, MALWARE_TIMEOUT);
708 log_write(0, LOG_MAIN|LOG_PANIC,
709 "malware acl condition: unable to read fsecure result (%s)", strerror(errno));
714 while ((i < sizeof(av_buffer)-1 ) && (av_buffer[i-1] != '\n'));
715 av_buffer[i-1] = '\0';
716 /* debug_printf("got line \"%s\"\n",av_buffer); */
718 /* Really search for virus again? */
719 if (malware_name == NULL) {
720 /* try matcher on the line, grab substring */
721 i = pcre_exec(fs_inf, NULL, CS av_buffer, Ustrlen(av_buffer), 0, 0, ovector, 30);
724 pcre_copy_substring(CS av_buffer, ovector, i, 1, CS malware_name_buffer, 255);
725 malware_name = malware_name_buffer;
729 while (Ustrstr(av_buffer, "OK\tScan ok.") == NULL);
732 /* ----------------------------------------------------------------------- */
734 /* "kavdaemon" scanner type ------------------------------------------------ */
735 else if (strcmpic(scanner_name,US"kavdaemon") == 0) {
737 uschar kav_options_buffer[1024];
738 uschar kav_options_default[] = "/var/run/AvpCtl";
739 struct sockaddr_un server;
743 uschar scanrequest[1024];
744 uschar kav_match_string[128];
746 unsigned long kav_reportlen, bread;
749 if ((kav_options = string_nextinlist(&av_scanner_work, &sep,
751 sizeof(kav_options_buffer))) == NULL) {
752 /* no options supplied, use default options */
753 kav_options = kav_options_default;
756 /* open the kavdaemon socket */
757 sock = socket(AF_UNIX, SOCK_STREAM, 0);
759 log_write(0, LOG_MAIN|LOG_PANIC,
760 "malware acl condition: can't open UNIX socket.");
763 server.sun_family = AF_UNIX;
764 Ustrcpy(server.sun_path, kav_options);
765 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
767 log_write(0, LOG_MAIN|LOG_PANIC,
768 "malware acl condition: unable to connect to kavdaemon UNIX socket (%s). errno=%d", kav_options, errno);
772 /* get current date and time, build scan request */
774 strftime(CS tmpbuf, sizeof(tmpbuf), "<0>%d %b %H:%M:%S:%%s/scan/%%s", localtime(&t));
775 (void)string_format(scanrequest, 1024,CS tmpbuf, spool_directory, message_id);
777 /* send scan request */
778 if (send(sock, scanrequest, Ustrlen(scanrequest)+1, 0) < 0) {
780 log_write(0, LOG_MAIN|LOG_PANIC,
781 "malware acl condition: unable to write to kavdaemon UNIX socket (%s)", kav_options);
785 /* wait for result */
786 if ((bread = recv(sock, tmpbuf, 2, 0) != 2)) {
788 log_write(0, LOG_MAIN|LOG_PANIC,
789 "malware acl condition: unable to read 2 bytes from kavdaemon socket.");
793 /* get errorcode from one nibble */
794 if (test_byte_order() == LITTLE_MY_ENDIAN) {
795 kav_rc = tmpbuf[0] & 0x0F;
798 kav_rc = tmpbuf[1] & 0x0F;
801 /* improper kavdaemon configuration */
802 if ( (kav_rc == 5) || (kav_rc == 6) ) {
804 log_write(0, LOG_MAIN|LOG_PANIC,
805 "malware acl condition: please reconfigure kavdaemon to NOT disinfect or remove infected files.");
811 log_write(0, LOG_MAIN|LOG_PANIC,
812 "malware acl condition: kavdaemon reported 'scanning not completed' (code 1).");
818 log_write(0, LOG_MAIN|LOG_PANIC,
819 "malware acl condition: kavdaemon reported 'kavdaemon damaged' (code 7).");
823 /* code 8 is not handled, since it is ambigous. It appears mostly on
824 bounces where part of a file has been cut off */
826 /* "virus found" return codes (2-4) */
827 if ((kav_rc > 1) && (kav_rc < 5)) {
830 /* setup default virus name */
831 Ustrcpy(malware_name_buffer,"unknown");
832 malware_name = malware_name_buffer;
834 if (test_byte_order() == LITTLE_MY_ENDIAN) {
835 report_flag = tmpbuf[1];
838 report_flag = tmpbuf[0];
841 /* read the report, if available */
842 if( report_flag == 1 ) {
843 /* read report size */
844 if ((bread = recv(sock, &kav_reportlen, 4, 0)) != 4) {
846 log_write(0, LOG_MAIN|LOG_PANIC,
847 "malware acl condition: cannot read report size from kavdaemon");
851 /* it's possible that avp returns av_buffer[1] == 1 but the
852 reportsize is 0 (!?) */
853 if (kav_reportlen > 0) {
854 /* set up match regex, depends on retcode */
856 Ustrcpy(kav_match_string, "suspicion:\\s*(.+?)\\s*$");
858 Ustrcpy(kav_match_string, "infected:\\s*(.+?)\\s*$");
860 kav_re = pcre_compile( CS kav_match_string,
862 (const char **)&rerror,
866 /* read report, linewise */
867 while (kav_reportlen > 0) {
872 while ( recv(sock, &tmpbuf[bread], 1, 0) == 1 ) {
874 if ( (tmpbuf[bread] == '\n') || (bread > 1021) ) break;
878 tmpbuf[bread] = '\0';
880 /* try matcher on the line, grab substring */
881 result = pcre_exec(kav_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0, ovector, 30);
883 pcre_copy_substring(CS tmpbuf, ovector, result, 1, CS malware_name_buffer, 255);
897 /* ----------------------------------------------------------------------- */
900 /* "cmdline" scanner type ------------------------------------------------ */
901 else if (strcmpic(scanner_name,US"cmdline") == 0) {
902 uschar *cmdline_scanner;
903 uschar cmdline_scanner_buffer[1024];
904 uschar *cmdline_trigger;
905 uschar cmdline_trigger_buffer[1024];
906 const pcre *cmdline_trigger_re;
907 uschar *cmdline_regex;
908 uschar cmdline_regex_buffer[1024];
909 const pcre *cmdline_regex_re;
910 uschar file_name[1024];
911 uschar commandline[1024];
912 void (*eximsigchld)(int);
913 void (*eximsigpipe)(int);
914 FILE *scanner_out = NULL;
915 FILE *scanner_record = NULL;
916 uschar linebuffer[32767];
921 /* find scanner command line */
922 if ((cmdline_scanner = string_nextinlist(&av_scanner_work, &sep,
923 cmdline_scanner_buffer,
924 sizeof(cmdline_scanner_buffer))) == NULL) {
925 /* no command line supplied */
926 log_write(0, LOG_MAIN|LOG_PANIC,
927 "malware acl condition: missing commandline specification for cmdline scanner type.");
931 /* find scanner output trigger */
932 if ((cmdline_trigger = string_nextinlist(&av_scanner_work, &sep,
933 cmdline_trigger_buffer,
934 sizeof(cmdline_trigger_buffer))) == NULL) {
935 /* no trigger regex supplied */
936 log_write(0, LOG_MAIN|LOG_PANIC,
937 "malware acl condition: missing trigger specification for cmdline scanner type.");
941 /* precompile trigger regex */
942 cmdline_trigger_re = pcre_compile(CS cmdline_trigger, PCRE_COPT, (const char **)&rerror, &roffset, NULL);
943 if (cmdline_trigger_re == NULL) {
944 log_write(0, LOG_MAIN|LOG_PANIC,
945 "malware acl condition: regular expression error in '%s': %s at offset %d", cmdline_trigger_re, rerror, roffset);
949 /* find scanner name regex */
950 if ((cmdline_regex = string_nextinlist(&av_scanner_work, &sep,
951 cmdline_regex_buffer,
952 sizeof(cmdline_regex_buffer))) == NULL) {
953 /* no name regex supplied */
954 log_write(0, LOG_MAIN|LOG_PANIC,
955 "malware acl condition: missing virus name regex specification for cmdline scanner type.");
959 /* precompile name regex */
960 cmdline_regex_re = pcre_compile(CS cmdline_regex, PCRE_COPT, (const char **)&rerror, &roffset, NULL);
961 if (cmdline_regex_re == NULL) {
962 log_write(0, LOG_MAIN|LOG_PANIC,
963 "malware acl condition: regular expression error in '%s': %s at offset %d", cmdline_regex_re, rerror, roffset);
967 /* prepare scanner call */
968 (void)string_format(file_name,1024,"%s/scan/%s", spool_directory, message_id);
969 (void)string_format(commandline,1024, CS cmdline_scanner,file_name);
970 /* redirect STDERR too */
971 Ustrcat(commandline," 2>&1");
973 /* store exims signal handlers */
974 eximsigchld = signal(SIGCHLD,SIG_DFL);
975 eximsigpipe = signal(SIGPIPE,SIG_DFL);
977 scanner_out = popen(CS commandline,"r");
978 if (scanner_out == NULL) {
979 log_write(0, LOG_MAIN|LOG_PANIC,
980 "malware acl condition: calling cmdline scanner (%s) failed: %s.", commandline, strerror(errno));
981 signal(SIGCHLD,eximsigchld);
982 signal(SIGPIPE,eximsigpipe);
986 (void)string_format(file_name,1024,"%s/scan/%s/%s_scanner_output", spool_directory, message_id, message_id);
987 scanner_record = modefopen(file_name,"wb",SPOOL_MODE);
989 if (scanner_record == NULL) {
990 log_write(0, LOG_MAIN|LOG_PANIC,
991 "malware acl condition: opening scanner output file (%s) failed: %s.", file_name, strerror(errno));
993 signal(SIGCHLD,eximsigchld);
994 signal(SIGPIPE,eximsigpipe);
998 /* look for trigger while recording output */
999 while(fgets(CS linebuffer,32767,scanner_out) != NULL) {
1000 if ( Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record) ) {
1002 log_write(0, LOG_MAIN|LOG_PANIC,
1003 "malware acl condition: short write on scanner output file (%s).", file_name);
1004 pclose(scanner_out);
1005 signal(SIGCHLD,eximsigchld);
1006 signal(SIGPIPE,eximsigpipe);
1009 /* try trigger match */
1010 if (!trigger && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1))
1014 (void)fclose(scanner_record);
1015 pclose(scanner_out);
1016 signal(SIGCHLD,eximsigchld);
1017 signal(SIGPIPE,eximsigpipe);
1020 /* setup default virus name */
1021 Ustrcpy(malware_name_buffer,"unknown");
1022 malware_name = malware_name_buffer;
1024 /* re-open the scanner output file, look for name match */
1025 scanner_record = fopen(CS file_name,"rb");
1026 while(fgets(CS linebuffer,32767,scanner_record) != NULL) {
1028 result = pcre_exec(cmdline_regex_re, NULL, CS linebuffer, Ustrlen(linebuffer), 0, 0, ovector, 30);
1030 pcre_copy_substring(CS linebuffer, ovector, result, 1, CS malware_name_buffer, 255);
1033 (void)fclose(scanner_record);
1036 /* no virus found */
1037 malware_name = NULL;
1040 /* ----------------------------------------------------------------------- */
1043 /* "sophie" scanner type ------------------------------------------------- */
1044 else if (strcmpic(scanner_name,US"sophie") == 0) {
1045 uschar *sophie_options;
1046 uschar sophie_options_buffer[1024];
1047 uschar sophie_options_default[] = "/var/run/sophie";
1049 struct sockaddr_un server;
1051 uschar file_name[1024];
1052 uschar av_buffer[1024];
1054 if ((sophie_options = string_nextinlist(&av_scanner_work, &sep,
1055 sophie_options_buffer,
1056 sizeof(sophie_options_buffer))) == NULL) {
1057 /* no options supplied, use default options */
1058 sophie_options = sophie_options_default;
1061 /* open the sophie socket */
1062 sock = socket(AF_UNIX, SOCK_STREAM, 0);
1064 log_write(0, LOG_MAIN|LOG_PANIC,
1065 "malware acl condition: can't open UNIX socket.");
1068 server.sun_family = AF_UNIX;
1069 Ustrcpy(server.sun_path, sophie_options);
1070 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
1072 log_write(0, LOG_MAIN|LOG_PANIC,
1073 "malware acl condition: unable to connect to sophie UNIX socket (%s). errno=%d", sophie_options, errno);
1077 /* pass the scan directory to sophie */
1078 (void)string_format(file_name,1024,"%s/scan/%s", spool_directory, message_id);
1079 if (write(sock, file_name, Ustrlen(file_name)) < 0) {
1081 log_write(0, LOG_MAIN|LOG_PANIC,
1082 "malware acl condition: unable to write to sophie UNIX socket (%s)", sophie_options);
1086 (void)write(sock, "\n", 1);
1088 /* wait for result */
1089 memset(av_buffer, 0, sizeof(av_buffer));
1090 if ((!(bread = ip_recv(sock, av_buffer, sizeof(av_buffer), MALWARE_TIMEOUT)) > 0)) {
1092 log_write(0, LOG_MAIN|LOG_PANIC,
1093 "malware acl condition: unable to read from sophie UNIX socket (%s)", sophie_options);
1100 if (av_buffer[0] == '1') {
1101 if (Ustrchr(av_buffer, '\n')) *Ustrchr(av_buffer, '\n') = '\0';
1102 Ustrcpy(malware_name_buffer,&av_buffer[2]);
1103 malware_name = malware_name_buffer;
1105 else if (!strncmp(CS av_buffer, "-1", 2)) {
1106 log_write(0, LOG_MAIN|LOG_PANIC,
1107 "malware acl condition: malware acl condition: sophie reported error");
1111 /* all ok, no virus */
1112 malware_name = NULL;
1115 /* ----------------------------------------------------------------------- */
1118 /* "clamd" scanner type ------------------------------------------------- */
1119 /* This code was contributed by David Saez */
1120 else if (strcmpic(scanner_name,US"clamd") == 0) {
1121 uschar *clamd_options;
1122 uschar clamd_options_buffer[1024];
1123 uschar clamd_options_default[] = "/tmp/clamd";
1125 struct sockaddr_un server;
1128 uschar file_name[1024];
1129 uschar av_buffer[1024];
1130 uschar hostname[256];
1133 uschar *clamd_options2;
1134 uschar clamd_options2_buffer[1024];
1135 uschar clamd_options2_default[] = "";
1136 uschar av_buffer2[1024];
1137 uschar *clamav_fbuf;
1138 uschar scanrequest[1024];
1139 int sockData, clam_fd, result;
1142 if ((clamd_options = string_nextinlist(&av_scanner_work, &sep,
1143 clamd_options_buffer,
1144 sizeof(clamd_options_buffer))) == NULL) {
1145 /* no options supplied, use default options */
1146 clamd_options = clamd_options_default;
1148 if ((clamd_options2 = string_nextinlist(&av_scanner_work, &sep,
1149 clamd_options2_buffer,
1150 sizeof(clamd_options2_buffer))) == NULL) {
1151 clamd_options2 = clamd_options2_default;
1154 /* socket does not start with '/' -> network socket */
1155 if (*clamd_options != '/') {
1157 /* extract host and port part */
1158 if( sscanf(CS clamd_options, "%s %u", hostname, &port) != 2 ) {
1159 log_write(0, LOG_MAIN|LOG_PANIC,
1160 "malware acl condition: clamd: invalid socket '%s'", clamd_options);
1164 /* Lookup the host */
1165 if((he = gethostbyname(CS hostname)) == 0) {
1166 log_write(0, LOG_MAIN|LOG_PANIC,
1167 "malware acl condition: clamd: failed to lookup host '%s'", hostname);
1171 in = *(struct in_addr *) he->h_addr_list[0];
1173 /* Open the ClamAV Socket */
1174 if ( (sock = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
1175 log_write(0, LOG_MAIN|LOG_PANIC,
1176 "malware acl condition: clamd: unable to acquire socket (%s)",
1181 if (ip_connect(sock, AF_INET, (uschar*)inet_ntoa(in), port, 5) < 0) {
1183 log_write(0, LOG_MAIN|LOG_PANIC,
1184 "malware acl condition: clamd: connection to %s, port %u failed (%s)",
1185 inet_ntoa(in), port, strerror(errno));
1189 if (strcmpic(clamd_options2,US"local") == 0) {
1191 /* Pass the string to ClamAV (7 = "SCAN \n" + \0) */
1193 (void)string_format(file_name,1024,"SCAN %s/scan/%s\n", spool_directory, message_id);
1195 if (send(sock, file_name, Ustrlen(file_name), 0) < 0) {
1197 log_write(0, LOG_MAIN|LOG_PANIC,"malware acl condition: clamd: unable to write to socket (%s)",
1203 /* Pass the string to ClamAV (7 = "STREAM\n") */
1205 if (send(sock, "STREAM\n", 7, 0) < 0) {
1207 log_write(0, LOG_MAIN|LOG_PANIC,"malware acl condition: clamd: unable to write to socket (%s)",
1211 memset(av_buffer2, 0, sizeof(av_buffer2));
1212 bread = ip_recv(sock, av_buffer2, sizeof(av_buffer2), MALWARE_TIMEOUT);
1215 log_write(0, LOG_MAIN|LOG_PANIC,
1216 "malware acl condition: clamd: unable to read PORT from socket (%s)",
1221 if (bread == sizeof(av_buffer)) {
1222 log_write(0, LOG_MAIN|LOG_PANIC,
1223 "malware acl condition: clamd: buffer too small");
1227 if (!(*av_buffer2)) {
1228 log_write(0, LOG_MAIN|LOG_PANIC,
1229 "malware acl condition: clamd: ClamAV returned null");
1233 av_buffer2[bread] = '\0';
1234 if( sscanf(CS av_buffer2, "PORT %u\n", &port) != 1 ) {
1235 log_write(0, LOG_MAIN|LOG_PANIC,
1236 "malware acl condition: clamd: Expected port information from clamd, got '%s'", av_buffer2);
1240 if ( (sockData = ip_socket(SOCK_STREAM, AF_INET)) < 0) {
1241 log_write(0, LOG_MAIN|LOG_PANIC,
1242 "malware acl condition: clamd: unable to acquire socket (%s)",
1247 if (ip_connect(sockData, AF_INET, (uschar*)inet_ntoa(in), port, 5) < 0) {
1248 (void)close(sockData);
1249 log_write(0, LOG_MAIN|LOG_PANIC,
1250 "malware acl condition: clamd: connection to %s, port %u failed (%s)",
1251 inet_ntoa(in), port, strerror(errno));
1255 (void)string_format(scanrequest, 1024,CS"%s/scan/%s/%s.eml",
1256 spool_directory, message_id, message_id);
1258 /* calc file size */
1259 clam_fd = open(CS scanrequest, O_RDONLY);
1260 if (clam_fd == -1) {
1261 log_write(0, LOG_MAIN|LOG_PANIC,
1262 "malware acl condition: clamd: can't open spool file %s: %s",
1263 scanrequest, strerror(errno));
1266 fsize = lseek(clam_fd, 0, SEEK_END);
1268 log_write(0, LOG_MAIN|LOG_PANIC,
1269 "malware acl condition: clamd: can't seek spool file %s: %s",
1270 scanrequest, strerror(errno));
1273 lseek(clam_fd, 0, SEEK_SET);
1275 clamav_fbuf = (uschar *) malloc (fsize);
1277 (void)close(sockData);
1278 (void)close(clam_fd);
1279 log_write(0, LOG_MAIN|LOG_PANIC,
1280 "malware acl condition: clamd: unable to allocate memory %u for file (%s)",
1281 fsize, scanrequest);
1285 result = read (clam_fd, clamav_fbuf, fsize);
1287 (void)close(sockData);
1288 (void)close(clam_fd);
1290 log_write(0, LOG_MAIN|LOG_PANIC,
1291 "malware acl condition: clamd: can't read spool file %s: %s",
1292 scanrequest, strerror(errno));
1295 (void)close(clam_fd);
1297 /* send file body to socket */
1298 if (send(sockData, clamav_fbuf, fsize, 0) < 0) {
1299 (void)close(sockData);
1301 log_write(0, LOG_MAIN|LOG_PANIC,
1302 "malware acl condition: clamd: unable to send file body to socket (%s:%u)", hostname, port);
1306 (void)close(sockData);
1310 /* open the local socket */
1311 if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
1312 log_write(0, LOG_MAIN|LOG_PANIC,
1313 "malware acl condition: clamd: unable to acquire socket (%s)",
1318 server.sun_family = AF_UNIX;
1319 Ustrcpy(server.sun_path, clamd_options);
1321 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
1323 log_write(0, LOG_MAIN|LOG_PANIC,
1324 "malware acl condition: clamd: unable to connect to UNIX socket %s (%s)",
1325 clamd_options, strerror(errno) );
1330 /* Pass the string to ClamAV (7 = "SCAN \n" + \0) */
1332 (void)string_format(file_name,1024,"SCAN %s/scan/%s\n", spool_directory, message_id);
1334 if (send(sock, file_name, Ustrlen(file_name), 0) < 0) {
1336 log_write(0, LOG_MAIN|LOG_PANIC,"malware acl condition: clamd: unable to write to socket (%s)",
1342 We're done sending, close socket for writing.
1344 One user reported that clamd 0.70 does not like this any more ...
1348 /* shutdown(sock, SHUT_WR); */
1350 /* Read the result */
1351 memset(av_buffer, 0, sizeof(av_buffer));
1352 bread = ip_recv(sock, av_buffer, sizeof(av_buffer), MALWARE_TIMEOUT);
1356 log_write(0, LOG_MAIN|LOG_PANIC,
1357 "malware acl condition: clamd: unable to read from socket (%s)",
1362 if (bread == sizeof(av_buffer)) {
1363 log_write(0, LOG_MAIN|LOG_PANIC,
1364 "malware acl condition: clamd: buffer too small");
1368 /* Check the result. ClamAV Returns
1369 infected: -> "<filename>: <virusname> FOUND"
1370 not-infected: -> "<filename>: OK"
1371 error: -> "<filename>: <errcode> ERROR */
1373 if (!(*av_buffer)) {
1374 log_write(0, LOG_MAIN|LOG_PANIC,
1375 "malware acl condition: clamd: ClamAV returned null");
1379 /* strip newline at the end */
1380 p = av_buffer + Ustrlen(av_buffer) - 1;
1381 if( *p == '\n' ) *p = '\0';
1383 /* colon in returned output? */
1384 if((p = Ustrrchr(av_buffer,':')) == NULL) {
1385 log_write(0, LOG_MAIN|LOG_PANIC,
1386 "malware acl condition: clamd: ClamAV returned malformed result: %s",
1391 /* strip filename */
1393 while (*p == ' ') ++p;
1395 if ((p = Ustrstr(vname, "FOUND"))!=NULL) {
1397 for (--p;p>vname && *p<=32;p--) *p=0;
1398 for (;*vname==32;vname++);
1399 Ustrcpy(malware_name_buffer,vname);
1400 malware_name = malware_name_buffer;
1403 if (Ustrstr(vname, "ERROR")!=NULL) {
1404 /* ClamAV reports ERROR
1406 for (;*vname!='\n' && vname>av_buffer; vname--);
1407 if (*vname=='\n') vname++;
1409 log_write(0, LOG_MAIN|LOG_PANIC,
1410 "malware acl condition: clamd: ClamAV returned %s",vname);
1414 /* Everything should be OK */
1415 malware_name = NULL;
1419 /* ----------------------------------------------------------------------- */
1422 /* "mksd" scanner type --------------------------------------------------- */
1423 else if (strcmpic(scanner_name,US"mksd") == 0) {
1424 uschar *mksd_options;
1425 char *mksd_options_end;
1426 uschar mksd_options_buffer[32];
1427 int mksd_maxproc = 1; /* default, if no option supplied */
1428 struct sockaddr_un server;
1432 if ((mksd_options = string_nextinlist(&av_scanner_work, &sep,
1433 mksd_options_buffer,
1434 sizeof(mksd_options_buffer))) != NULL) {
1435 mksd_maxproc = (int) strtol(CS mksd_options, &mksd_options_end, 10);
1436 if ((*mksd_options == '\0') || (*mksd_options_end != '\0') ||
1437 (mksd_maxproc < 1) || (mksd_maxproc > 32)) {
1438 log_write(0, LOG_MAIN|LOG_PANIC,
1439 "malware acl condition: mksd: invalid option '%s'", mksd_options);
1444 /* open the mksd socket */
1445 sock = socket(AF_UNIX, SOCK_STREAM, 0);
1447 log_write(0, LOG_MAIN|LOG_PANIC,
1448 "malware acl condition: can't open UNIX socket.");
1451 server.sun_family = AF_UNIX;
1452 Ustrcpy(server.sun_path, "/var/run/mksd/socket");
1453 if (connect(sock, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
1455 log_write(0, LOG_MAIN|LOG_PANIC,
1456 "malware acl condition: unable to connect to mksd UNIX socket (/var/run/mksd/socket). errno=%d", errno);
1460 malware_name = NULL;
1462 retval = mksd_scan_packed(sock);
1467 /* ----------------------------------------------------------------------- */
1469 /* "unknown" scanner type ------------------------------------------------- */
1471 log_write(0, LOG_MAIN|LOG_PANIC,
1472 "malware condition: unknown scanner type '%s'", scanner_name);
1475 /* ----------------------------------------------------------------------- */
1477 /* set "been here, done that" marker */
1481 /* match virus name against pattern (caseless ------->----------v) */
1482 if ( (malware_name != NULL) &&
1483 (regex_match_and_setup(re, malware_name, 0, -1)) ) {
1492 /* simple wrapper for reading lines from sockets */
1493 int recv_line(int sock, uschar *buffer, int size) {
1496 memset(buffer,0,size);
1498 while(recv(sock,p,1,0) > -1) {
1499 if ((p-buffer) > (size-2)) break;
1500 if (*p == '\n') break;
1501 if (*p != '\r') p++;
1509 /* ============= private routines for the "mksd" scanner type ============== */
1511 #include <sys/uio.h>
1513 int mksd_writev (int sock, struct iovec *iov, int iovcnt)
1519 i = writev (sock, iov, iovcnt);
1520 while ((i < 0) && (errno == EINTR));
1523 log_write(0, LOG_MAIN|LOG_PANIC,
1524 "malware acl condition: unable to write to mksd UNIX socket (/var/run/mksd/socket)");
1529 if (i >= iov->iov_len) {
1536 iov->iov_base = CS iov->iov_base + i;
1542 int mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size)
1548 if ((i = recv (sock, av_buffer+offset, av_buffer_size-offset, 0)) <= 0) {
1550 log_write(0, LOG_MAIN|LOG_PANIC,
1551 "malware acl condition: unable to read from mksd UNIX socket (/var/run/mksd/socket)");
1556 /* offset == av_buffer_size -> buffer full */
1557 if (offset == av_buffer_size) {
1559 log_write(0, LOG_MAIN|LOG_PANIC,
1560 "malware acl condition: malformed reply received from mksd");
1563 } while (av_buffer[offset-1] != '\n');
1565 av_buffer[offset] = '\0';
1569 int mksd_parse_line (char *line)
1580 if ((p = strchr (line, '\n')) != NULL)
1582 log_write(0, LOG_MAIN|LOG_PANIC,
1583 "malware acl condition: mksd scanner failed: %s", line);
1587 if ((p = strchr (line, '\n')) != NULL) {
1589 if (((p-line) > 5) && ((p-line) < sizeof (malware_name_buffer)) && (line[3] == ' '))
1590 if (((p = strchr (line+4, ' ')) != NULL) && ((p-line) > 4)) {
1592 Ustrcpy (malware_name_buffer, line+4);
1593 malware_name = malware_name_buffer;
1597 log_write(0, LOG_MAIN|LOG_PANIC,
1598 "malware acl condition: malformed reply received from mksd: %s", line);
1603 int mksd_scan_packed (int sock)
1605 struct iovec iov[7];
1606 char *cmd = "MSQ/scan/.eml\n";
1607 uschar av_buffer[1024];
1609 iov[0].iov_base = cmd;
1611 iov[1].iov_base = CS spool_directory;
1612 iov[1].iov_len = Ustrlen (spool_directory);
1613 iov[2].iov_base = cmd + 3;
1615 iov[3].iov_base = iov[5].iov_base = CS message_id;
1616 iov[3].iov_len = iov[5].iov_len = Ustrlen (message_id);
1617 iov[4].iov_base = cmd + 3;
1619 iov[6].iov_base = cmd + 9;
1622 if (mksd_writev (sock, iov, 7) < 0)
1625 if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer)) < 0)
1630 return mksd_parse_line (CS av_buffer);