3 // $Id: spamass-milter.cpp,v 1.90 2006/03/23 21:41:36 dnelson Exp $
6 // - a rather trivial SpamAssassin Sendmail Milter plugin
8 // for information about SpamAssassin please see
9 // http://www.spamassassin.org
11 // for information about Sendmail please see
12 // http://www.sendmail.org
14 // Copyright (c) 2002 Georg C. F. Greve <greve@gnu.org>,
15 // all rights maintained by FSF Europe e.V.,
16 // Villa Vogelsang, Antonienallee 1, 45279 Essen, Germany
19 // {{{ License, Contact, Notes & Includes
21 // This program is free software; you can redistribute it and/or modify
22 // it under the terms of the GNU General Public License as published by
23 // the Free Software Foundation; either version 2 of the License, or
24 // (at your option) any later version.
26 // This program is distributed in the hope that it will be useful,
27 // but WITHOUT ANY WARRANTY; without even the implied warranty of
28 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 // GNU General Public License for more details.
31 // You should have received a copy of the GNU General Public License
32 // along with this program; if not, write to the Free Software
33 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
36 // Michael Brown <michaelb@opentext.com>
41 // The libmilter for sendmail works callback-oriented, so if you have no
42 // experience with event-driven programming, the following may be hard for
45 // The code should be reasonably thread-safe. No guarantees, though.
47 // This program roughly does the following steps:
49 // 1. register filter with libmilter & set up socket
50 // 2. register the callback functions defined in this file
51 // -- wait for mail to show up --
52 // 3. start spamc client
53 // 4. assemble mail since libmilter passes it in pieces and put
54 // these parts in the output pipe to spamc.
55 // 5. when the mail is complete, close the pipe.
56 // 6. read output from spamc, close input pipe and clean up PID
57 // 7. check for the flags affected by SpamAssassin and set/change
59 // 8. replace the body with the one provided by SpamAssassin if the
60 // mail was rated spam, unless -m is specified
61 // 9. free all temporary data
62 // 10. tell sendmail to let the mail to go on (default) or be discarded
63 // -- wait for mail to show up -- (restart at 3)
69 #include <arpa/inet.h>
70 #include <sys/types.h>
73 #include <netinet/in.h>
88 #include "subst_poll.h"
103 #include "libmilter/mfapi.h"
104 //#include "libmilter/mfdef.h"
106 #if !HAVE_DECL_STRSEP
107 char *strsep(char **stringp, const char *delim);
110 #if !HAVE_DECL_DAEMON
111 int daemon(int nochdir, int noclose);
118 #include "spamass-milter.h"
124 #ifndef INADDR_LOOPBACK
125 #define INADDR_LOOPBACK 0x7F000001
130 static const char Id[] = "$Id: spamass-milter.cpp,v 1.90 2006/03/23 21:41:36 dnelson Exp $";
132 struct smfiDesc smfilter =
134 "SpamAssassin", // filter name
135 SMFI_VERSION, // version code -- leave untouched
136 SMFIF_ADDHDRS|SMFIF_CHGHDRS|SMFIF_CHGBODY, // flags
137 mlfi_connect, // info filter callback
138 mlfi_helo, // HELO filter callback
139 mlfi_envfrom, // envelope sender filter callback
140 mlfi_envrcpt, // envelope recipient filter callback
141 mlfi_header, // header filter callback
142 mlfi_eoh, // end of header callback
143 mlfi_body, // body filter callback
144 mlfi_eom, // end of message callback
145 mlfi_abort, // message aborted callback
146 mlfi_close, // connection cleanup callback
149 const char *const debugstrings[] = {
150 "ALL", "FUNC", "POLL", "UORI", "STR", "MISC", "NET", "SPAMC", "RCPT",
155 int flag_debug = (1<<D_ALWAYS);
156 bool flag_reject = false;
157 int reject_score = -1;
158 bool dontmodifyspam = false; // Don't modify/add body or spam results headers
159 bool dontmodify = false; // Don't add SA headers, ever.
160 bool flag_sniffuser = false;
161 char *defaultuser; /* Username to send to spamc if there are multiple recipients */
162 char *defaultdomain; /* Domain to append if incoming address has none */
164 struct networklist ignorenets;
167 bool flag_bucket = false;
168 bool flag_bucket_only = false;
170 bool flag_full_email = false; /* pass full email address to spamc */
171 bool flag_expand = false; /* alias/virtusertable expansion */
172 bool ignore_authenticated_senders = false;
173 bool warnedmacro = false; /* have we logged that we couldn't fetch a macro? */
178 main(int argc, char* argv[])
181 const char *args = "fd:mMp:P:r:u:D:i:Ib:B:e:x";
184 char *pidfilename = NULL;
185 FILE *pidfile = NULL;
186 struct sigaction children_sigaction;
188 #ifdef HAVE_VERBOSE_TERMINATE_HANDLER
189 std::set_terminate (__gnu_cxx::__verbose_terminate_handler);
192 openlog("spamass-milter", LOG_PID, LOG_MAIL);
194 /* Process command line options */
195 while ((c = getopt(argc, argv, args)) != -1) {
201 parse_debuglevel(optarg);
204 spamdhost = strdup(optarg);
207 flag_full_email = true;
208 defaultdomain = strdup(optarg);
211 debug(D_MISC, "Parsing ignore list");
212 parse_networklist(optarg, &ignorenets);
215 debug(D_MISC, "Ignore authenticated senders");
216 ignore_authenticated_senders = true;
219 dontmodifyspam = true;
220 smfilter.xxfi_flags &= ~SMFIF_CHGBODY;
224 dontmodifyspam = true;
225 smfilter.xxfi_flags &= ~(SMFIF_CHGBODY|SMFIF_CHGHDRS);
228 sock = strdup(optarg);
231 pidfilename = strdup(optarg);
235 reject_score = atoi(optarg);
238 flag_sniffuser = true;
239 defaultuser = strdup(optarg);
245 fprintf(stderr, "Can only have one -b or -B flag\n");
252 flag_bucket_only = true;
253 smfilter.xxfi_flags |= SMFIF_DELRCPT; // May delete recipients
255 // we will modify the recipient list; if spamc returns
256 // indicating that this mail is spam, the message will be
257 // sent to <optarg>@localhost
258 smfilter.xxfi_flags |= SMFIF_ADDRCPT; // May add recipients
259 // XXX we should probably verify that optarg is vaguely sane
260 spambucket = strdup( optarg );
271 if (flag_full_email && !flag_sniffuser)
273 fprintf(stderr, "-e flag requires -u\n");
277 /* remember the remainer of the arguments so we can pass them to spamc */
278 spamc_argc = argc - optind;
279 spamc_argv = argv + optind;
282 cout << PACKAGE_NAME << " - Version " << PACKAGE_VERSION << endl;
283 cout << "SpamAssassin Sendmail Milter Plugin" << endl;
284 cout << "Usage: spamass-milter -p socket [-b|-B bucket] [-d xx[,yy...]] [-D host]" << endl;
285 cout << " [-e defaultdomain] [-f] [-i networks] [-I] [-m] [-M]" << endl;
286 cout << " [-P pidfile] [-r nn] [-u defaultuser] [-x]" << endl;
287 cout << " [-- spamc args ]" << endl;
288 cout << " -p socket: path to create socket" << endl;
289 cout << " -b bucket: redirect spam to this mail address. The orignal" << endl;
290 cout << " recipient(s) will not receive anything." << endl;
291 cout << " -B bucket: add this mail address as a BCC recipient of spam." << endl;
292 cout << " -d xx[,yy ...]: set debug flags. Logs to syslog" << endl;
293 cout << " -D host: connect to spamd at remote host (deprecated)" << endl;
294 cout << " -e defaultdomain: pass full email address to spamc instead of just\n"
295 " username. Uses 'defaultdomain' if there was none" << endl;
296 cout << " -f: fork into background" << endl;
297 cout << " -i: skip (ignore) checks from these IPs or netblocks" << endl;
298 cout << " example: -i 192.168.12.5,10.0.0.0/8,172.16.0.0/255.255.0.0" << endl;
299 cout << " -I: skip (ignore) checks if sender is authenticated" << endl;
300 cout << " -m: don't modify body, Content-type: or Subject:" << endl;
301 cout << " -M: don't modify the message at all" << endl;
302 cout << " -P pidfile: Put processid in pidfile" << endl;
303 cout << " -r nn: reject messages with a score >= nn with an SMTP error.\n"
304 " use -1 to reject any messages tagged by SA." << endl;
305 cout << " -u defaultuser: pass the recipient's username to spamc.\n"
306 " Uses 'defaultuser' if there are multiple recipients." << endl;
307 cout << " -x: pass email address through alias and virtusertable expansion." << endl;
308 cout << " -- spamc args: pass the remaining flags to spamc." << endl;
316 pidfile = fopen(pidfilename,"w");
319 fprintf(stderr, "Could not open pidfile: %s\n", strerror(errno));
322 /* leave the file open through the fork, since we don't know our pid
330 if (daemon(0, 0) == -1)
332 fprintf(stderr, "daemon() failed: %s\n", strerror(errno));
339 fprintf(pidfile, "%ld\n", (long)getpid());
346 if (stat(sock,&junk) == 0) unlink(sock);
349 (void) smfi_setconn(sock);
350 if (smfi_register(smfilter) == MI_FAILURE) {
351 fprintf(stderr, "smfi_register failed\n");
352 exit(EX_UNAVAILABLE);
354 debug(D_MISC, "smfi_register succeeded");
356 debug(D_ALWAYS, "spamass-milter %s starting", PACKAGE_VERSION);
358 debug(D_ALWAYS, "spamass-milter %s exiting", PACKAGE_VERSION);
366 /* Update a header if SA changes it, or add it if it is new. */
367 void update_or_insert(SpamAssassin* assassin, SMFICTX* ctx, string oldstring, t_setter setter, char *header )
369 string::size_type eoh1 = assassin->d().find("\n\n");
370 string::size_type eoh2 = assassin->d().find("\n\r\n");
371 string::size_type eoh = ( eoh1 < eoh2 ? eoh1 : eoh2 );
374 string::size_type oldsize;
376 debug(D_UORI, "u_or_i: looking at <%s>", header);
377 debug(D_UORI, "u_or_i: oldstring: <%s>", oldstring.c_str());
379 newstring = retrieve_field(assassin->d().substr(0, eoh), header);
380 debug(D_UORI, "u_or_i: newstring: <%s>", newstring.c_str());
382 oldsize = callsetter(*assassin,setter)(newstring);
386 if (newstring != oldstring)
388 /* change if old one was present, append if non-null */
389 char* cstr = const_cast<char*>(newstring.c_str());
392 debug(D_UORI, "u_or_i: changing");
393 smfi_chgheader(ctx, header, 1, newstring.size() > 0 ?
395 } else if (newstring.size() > 0)
397 debug(D_UORI, "u_or_i: inserting");
398 smfi_addheader(ctx, header, cstr);
402 debug(D_UORI, "u_or_i: no change");
410 // implement the changes suggested by SpamAssassin for the mail. Returns
411 // the milter error code.
413 assassinate(SMFICTX* ctx, SpamAssassin* assassin)
415 // find end of header (eol in last line of header)
416 // and beginning of body
417 string::size_type eoh1 = assassin->d().find("\n\n");
418 string::size_type eoh2 = assassin->d().find("\n\r\n");
419 string::size_type eoh = (eoh1 < eoh2) ? eoh1 : eoh2;
420 string::size_type bob = assassin->d().find_first_not_of("\r\n", eoh);
422 if (bob == string::npos)
423 bob = assassin->d().size();
425 update_or_insert(assassin, ctx, assassin->spam_flag(), &SpamAssassin::set_spam_flag, "X-Spam-Flag");
426 update_or_insert(assassin, ctx, assassin->spam_status(), &SpamAssassin::set_spam_status, "X-Spam-Status");
428 /* Summarily reject the message if SA tagged it, or if we have a minimum
429 score, reject if it exceeds that score. */
432 bool do_reject = false;
433 if (reject_score == -1 && !assassin->spam_flag().empty())
435 if (reject_score != -1)
438 const char *spam_status = assassin->spam_status().c_str();
439 /* SA 3.0 uses the keyword "score" */
440 rv = sscanf(spam_status,"%*s score=%d", &score);
443 /* SA 2.x uses the keyword "hits" */
444 rv = sscanf(spam_status,"%*s hits=%d", &score);
447 debug(D_ALWAYS, "Could not extract score from <%s>", spam_status);
450 debug(D_MISC, "SA score: %d", score);
451 if (score >= reject_score)
457 debug(D_MISC, "Rejecting");
458 smfi_setreply(ctx, "550", "5.7.1", "Blocked by SpamAssassin");
463 /* If we also want a copy of the spam, shell out to sendmail and
464 send another copy. The milter API will not let you send the
465 message AND return a failure code to the sender, so this is
466 the only way to do it. */
471 popen_argv[0] = SENDMAIL;
472 popen_argv[1] = spambucket;
473 popen_argv[2] = NULL;
475 debug(D_COPY, "calling %s %s", SENDMAIL, spambucket);
476 p = popenv(popen_argv, "w",&pid);
479 debug(D_COPY, "popenv failed(%s). Will not send a copy to spambucket", strerror(errno));
482 // Send message provided by SpamAssassin
483 fwrite(assassin->d().c_str(), assassin->d().size(), 1, p);
492 /* Drop the message into the spam bucket if it's spam */
494 if (!assassin->spam_flag().empty()) {
495 // first, add the spambucket address
496 if ( smfi_addrcpt( ctx, spambucket ) != MI_SUCCESS ) {
497 throw string( "Failed to add spambucket to recipients" );
499 if (flag_bucket_only) {
500 // Move recipients to a non-active header, one at a
501 // time. Note, this may generate multiple X-Spam-Orig-To
502 // headers, but that's okay.
503 while( !assassin->recipients.empty()) {
504 if ( smfi_addheader( ctx, "X-Spam-Orig-To", (char *)assassin->recipients.front().c_str()) != MI_SUCCESS ) {
505 throw string( "Failed to save recipient" );
508 // It's not 100% important that this succeeds, so we'll just warn on failure rather than bailing out.
509 if ( smfi_delrcpt( ctx, (char *)assassin->recipients.front().c_str()) != MI_SUCCESS ) {
510 // throw_error really just logs a warning as opposed to actually throw()ing
511 debug(D_ALWAYS, "Failed to remove recipient %s from the envelope", assassin->recipients.front().c_str() );
513 assassin->recipients.pop_front();
519 update_or_insert(assassin, ctx, assassin->spam_report(), &SpamAssassin::set_spam_report, "X-Spam-Report");
520 update_or_insert(assassin, ctx, assassin->spam_prev_content_type(), &SpamAssassin::set_spam_prev_content_type, "X-Spam-Prev-Content-Type");
521 update_or_insert(assassin, ctx, assassin->spam_level(), &SpamAssassin::set_spam_level, "X-Spam-Level");
522 update_or_insert(assassin, ctx, assassin->spam_checker_version(), &SpamAssassin::set_spam_checker_version, "X-Spam-Checker-Version");
525 // If SpamAssassin thinks it is spam, replace
530 // However, only issue the header replacement calls if the content has
531 // actually changed. If SA didn't change subject or content-type, don't
532 // replace here unnecessarily.
533 if (!dontmodifyspam && assassin->spam_flag().size()>0)
535 update_or_insert(assassin, ctx, assassin->subject(), &SpamAssassin::set_subject, "Subject");
536 update_or_insert(assassin, ctx, assassin->content_type(), &SpamAssassin::set_content_type, "Content-Type");
538 // Replace body with the one SpamAssassin provided
539 string::size_type body_size = assassin->d().size() - bob;
540 string body=assassin->d().substr(bob, string::npos);
541 if ( smfi_replacebody(ctx, (unsigned char *)body.c_str(), body_size) == MI_FAILURE )
542 throw string("error. could not replace body.");
546 return SMFIS_CONTINUE;
549 // retrieve the content of a specific field in the header
552 old_retrieve_field(const string& header, const string& field)
554 // look for beginning of content
555 string::size_type pos = find_nocase(header, "\n" + field + ": ");
557 // return empty string if not found
558 if (pos == string::npos)
560 debug(D_STR, "r_f: failed");
564 // look for end of field name
565 pos = find_nocase(header, " ", pos) + 1;
567 string::size_type pos2(pos);
570 if (pos2 == find_nocase(header, "\n", pos2))
573 // look for end of content
576 pos2 = find_nocase(header, "\n", pos2+1);
579 while ( pos2 < string::npos &&
580 isspace(header[pos2+1]) );
582 return header.substr(pos, pos2-pos);
586 // retrieve the content of a specific field in the header
589 retrieve_field(const string& header, const string& field)
592 string::size_type field_start = string::npos;
593 string::size_type field_end = string::npos;
594 string::size_type idx = 0;
596 while( field_start == string::npos ) {
597 idx = find_nocase( header, field + ":", idx );
600 if ( idx == string::npos ) {
604 // The string we've found needs to be either at the start of the
605 // headers string, or immediately following a "\n"
607 if ( header[ idx - 1 ] != '\n' ) {
608 idx++; // so we don't get stuck in an infinite loop
609 continue; // loop around again
616 // A mail field starts just after the header. Ideally, there's a
617 // space, but it's possible that there isn't.
618 field_start += field.length() + 1;
619 if ( field_start < ( header.length() - 1 ) && header[ field_start ] == ' ' ) {
623 // See if there's anything left, to shortcut the rest of the
625 if ( field_start == header.length() - 1 ) {
629 // The field continues to the end of line. If the start of the next
630 // line is whitespace, then the field continues.
632 while( field_end == string::npos ) {
633 idx = header.find( "\n", idx );
635 // if we don't find a "\n", gobble everything to the end of the headers
636 if ( idx == string::npos ) {
637 field_end = header.length();
639 // check the next character
640 if (( idx + 1 ) < header.length() && ( isspace( header[ idx + 1 ] ))) {
641 idx ++; // whitespace found, so wrap to the next line
648 /* if the header line ends in \r\n, don't return the \r */
649 if (header[field_end-1] == '\r')
652 string data = header.substr( field_start, field_end - field_start );
654 /* Replace all CRLF pairs with LF */
656 while ( (idx = data.find("\r\n", idx)) != string::npos )
658 data.replace(idx,2,"\n");
667 // {{{ MLFI callbacks
670 // Gets called once when a client connects to sendmail
672 // gets the originating IP address and checks it against the ignore list
673 // if it isn't in the list, store the IP in a structure and store a
674 // pointer to it in the private data area.
677 mlfi_connect(SMFICTX * ctx, char *hostname, _SOCK_ADDR * hostaddr)
679 struct context *sctx;
682 debug(D_FUNC, "mlfi_connect: enter");
684 /* allocate a structure to store the IP address (and SA object) in */
685 sctx = (struct context *)malloc(sizeof(*sctx));
688 /* not a socket; probably a local user calling sendmail directly */
689 /* set to 127.0.0.1 */
690 sctx->connect_ip.s_addr = htonl(INADDR_LOOPBACK);
693 sctx->connect_ip = ((struct sockaddr_in *) hostaddr)->sin_addr;
695 sctx->assassin = NULL;
698 /* store a pointer to it with setpriv */
699 rv = smfi_setpriv(ctx, sctx);
700 if (rv != MI_SUCCESS)
702 debug(D_ALWAYS, "smfi_setpriv failed!");
703 return SMFIS_TEMPFAIL;
705 /* debug(D_ALWAYS, "ZZZ set private context to %p", sctx); */
707 if (ip_in_networklist(sctx->connect_ip, &ignorenets))
709 debug(D_NET, "%s is in our ignore list - accepting message",
710 inet_ntoa(sctx->connect_ip));
711 debug(D_FUNC, "mlfi_connect: exit ignore");
715 // Tell Milter to continue
716 debug(D_FUNC, "mlfi_connect: exit");
718 return SMFIS_CONTINUE;
722 // Gets called on every "HELO"
724 // stores the result in the context structure
726 sfsistat mlfi_helo(SMFICTX * ctx, char * helohost)
728 struct context *sctx = (struct context*)smfi_getpriv(ctx);
731 sctx->helo = strdup(helohost);
733 return SMFIS_CONTINUE;
737 // Gets called first for all messages
739 // creates SpamAssassin object and makes pointer to it
740 // private data of this filter process
743 mlfi_envfrom(SMFICTX* ctx, char** envfrom)
745 SpamAssassin* assassin;
746 struct context *sctx = (struct context *)smfi_getpriv(ctx);
751 debug(D_ALWAYS, "smfi_getpriv failed!");
752 return SMFIS_TEMPFAIL;
754 /* debug(D_ALWAYS, "ZZZ got private context %p", sctx); */
756 if (ignore_authenticated_senders)
760 auth_authen = smfi_getsymval(ctx, "{auth_authen}");
761 debug(D_MISC, "auth_authen=%s", auth_authen ?: "<unauthenticated>");
765 debug(D_MISC, "sender authenticated (%s) - accepting message",
767 debug(D_FUNC, "mlfi_envfrom: exit ignore");
772 debug(D_FUNC, "mlfi_envfrom: enter");
774 // launch new SpamAssassin
775 assassin=new SpamAssassin;
776 } catch (string& problem)
778 throw_error(problem);
779 return SMFIS_TEMPFAIL;
782 assassin->set_connectip(string(inet_ntoa(sctx->connect_ip)));
784 // Store a pointer to the assassin object in our context struct
785 sctx->assassin = assassin;
787 // remember the MAIL FROM address
788 assassin->set_from(string(envfrom[0]));
790 queueid=smfi_getsymval(ctx,"i");
794 warnmacro("i", "ENVFROM");
796 assassin->queueid = queueid;
798 debug(D_MISC, "queueid=%s", queueid);
800 // tell Milter to continue
801 debug(D_FUNC, "mlfi_envfrom: exit");
803 return SMFIS_CONTINUE;
807 // Gets called once for each recipient
809 // stores the first recipient in the spamassassin object and
810 // stores all addresses and the number thereof (some redundancy)
815 mlfi_envrcpt(SMFICTX* ctx, char** envrcpt)
817 struct context *sctx = (struct context*)smfi_getpriv(ctx);
818 SpamAssassin* assassin = sctx->assassin;
820 #if defined(__FreeBSD__)
824 debug(D_FUNC, "mlfi_envrcpt: enter");
828 /* open a pipe to sendmail so we can do address expansion */
834 popen_argv[0] = SENDMAIL;
835 popen_argv[1] = "-bv";
836 popen_argv[2] = envrcpt[0];
837 popen_argv[3] = NULL;
839 debug(D_RCPT, "calling %s -bv %s", SENDMAIL, envrcpt[0]);
841 p = popenv(popen_argv, "r", &pid);
844 debug(D_RCPT, "popenv failed(%s). Will not expand aliases", strerror(errno));
845 assassin->expandedrcpt.push_back(envrcpt[0]);
848 while (fgets(buf, sizeof(buf), p) != NULL)
851 /* strip trailing EOLs */
852 while (i > 0 && buf[i - 1] <= ' ')
855 debug(D_RCPT, "sendmail output: %s", buf);
856 /* From a quick scan of the sendmail source, a valid email
857 address gets printed via either
858 "deliverable: mailer %s, host %s, user %s"
859 or "deliverable: mailer %s, user %s"
861 if (strstr(buf, "... deliverable: mailer "))
863 char *p=strstr(buf,", user ");
864 /* anything after ", user " is the email address */
865 debug(D_RCPT, "user: %s", p+7);
866 assassin->expandedrcpt.push_back(p+7);
875 assassin->expandedrcpt.push_back(envrcpt[0]);
877 debug(D_RCPT, "Total of %d actual recipients", (int)assassin->expandedrcpt.size());
879 if (assassin->numrcpt() == 0)
881 /* Send the envelope headers as X-Envelope-From: and
882 X-Envelope-To: so that SpamAssassin can use them in its
883 whitelist checks. Also forge as complete a dummy
884 Received: header as possible because SA gets a lot of
887 HReceived: $?sfrom $s $.$?_($?s$|from $.$_)
888 $.$?{auth_type}(authenticated$?{auth_ssf} bits=${auth_ssf}$.)
889 $.by $j ($v/$Z)$?r with $r$. id $i$?{tls_version}
890 (version=${tls_version} cipher=${cipher} bits=${cipher_bits} verify=${verify})$.$?u
896 const char *macro_b, *macro_i, *macro_j, *macro_r,
897 *macro_s, *macro_v, *macro_Z, *macro__;
901 macro_b = smfi_getsymval(ctx, "b");
906 strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %z", localtime(&tval));
908 warnmacro("b", "ENVRCPT");
912 macro_i = smfi_getsymval(ctx, "i");
916 warnmacro("i", "ENVRCPT");
919 /* FQDN of this site */
920 macro_j = smfi_getsymval(ctx, "j");
923 macro_j = "localhost";
924 warnmacro("j", "ENVRCPT");
927 /* Protocol used to receive the message */
928 macro_r = smfi_getsymval(ctx, "r");
932 warnmacro("r", "ENVRCPT");
935 /* Sendmail currently cannot pass us the {s} macro, but
936 I do not know why. Leave this in for the day sendmail is
937 fixed. Until that day, use the value remembered by
940 macro_s = smfi_getsymval(ctx, "s");
942 macro_s = sctx->helo;
946 /* Sendmail binary version */
947 macro_v = smfi_getsymval(ctx, "v");
951 warnmacro("v", "ENVRCPT");
954 /* Sendmail .cf version */
955 macro_Z = smfi_getsymval(ctx, "Z");
959 warnmacro("Z", "ENVRCPT");
962 /* Validated sending site's address */
963 macro__ = smfi_getsymval(ctx, "_");
967 warnmacro("_", "ENVRCPT");
970 assassin->output((string)"X-Envelope-From: "+assassin->from()+"\r\n");
971 assassin->output((string)"X-Envelope-To: "+envrcpt[0]+"\r\n");
973 assassin->output((string)
974 "Received: from "+macro_s+" ("+macro__+")\r\n\t"+
975 "by "+macro_j+" ("+macro_v+"/"+macro_Z+") with "+macro_r+" id "+macro_i+"\r\n\t"+
977 "(envelope-from "+assassin->from()+")\r\n");
980 assassin->output((string)"X-Envelope-To: "+envrcpt[0]+"\r\n");
982 /* increment RCPT TO: count */
983 assassin->set_numrcpt();
985 /* If we expanded to at least one user and we haven't recorded one yet,
986 record the first one */
987 if (!assassin->expandedrcpt.empty() && (assassin->rcpt().size() == 0))
989 debug(D_RCPT, "remembering %s for spamc", assassin->expandedrcpt.front().c_str());
990 assassin->set_rcpt(assassin->expandedrcpt.front());
993 debug(D_RCPT, "remembering recipient %s", envrcpt[0]);
994 assassin->recipients.push_back( envrcpt[0] ); // XXX verify that this worked
996 debug(D_FUNC, "mlfi_envrcpt: exit");
998 return SMFIS_CONTINUE;
1002 // Gets called repeatedly for all header fields
1004 // assembles the headers and passes them on to the SpamAssassin client
1005 // through the pipe.
1007 // only exception: SpamAssassin header fields (X-Spam-*) get suppressed
1008 // but are being stored in the SpamAssassin element.
1010 // this function also starts the connection with the SPAMC program the
1011 // first time it is called.
1015 mlfi_header(SMFICTX* ctx, char* headerf, char* headerv)
1017 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1018 debug(D_FUNC, "mlfi_header: enter");
1020 // Check if the SPAMC program has already been run, if not we run it.
1021 if ( !(assassin->connected) )
1024 assassin->connected = 1; // SPAMC is getting ready to run
1025 assassin->Connect();
1027 catch (string& problem) {
1028 throw_error(problem);
1029 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1031 debug(D_FUNC, "mlfi_header: exit error connect");
1032 return SMFIS_TEMPFAIL;
1036 // Is it a "X-Spam-" header field?
1037 if ( cmp_nocase_partial("X-Spam-", headerf) == 0 )
1040 // memorize content of old fields
1042 if ( cmp_nocase_partial("X-Spam-Status", headerf) == 0 )
1043 assassin->set_spam_status(headerv);
1044 else if ( cmp_nocase_partial("X-Spam-Flag", headerf) == 0 )
1045 assassin->set_spam_flag(headerv);
1046 else if ( cmp_nocase_partial("X-Spam-Report", headerf) == 0 )
1047 assassin->set_spam_report(headerv);
1048 else if ( cmp_nocase_partial("X-Spam-Prev-Content-Type", headerf) == 0 )
1049 assassin->set_spam_prev_content_type(headerv);
1050 else if ( cmp_nocase_partial("X-Spam-Level", headerf) == 0 )
1051 assassin->set_spam_level(headerv);
1052 else if ( cmp_nocase_partial("X-Spam-Checker-Version", headerf) == 0 )
1053 assassin->set_spam_checker_version(headerv);
1056 /* Hm. X-Spam header, but not one we recognize. Pass it through. */
1062 debug(D_FUNC, "mlfi_header: suppress");
1063 return SMFIS_CONTINUE;
1067 // Content-Type: will be stored if present
1068 if ( cmp_nocase_partial("Content-Type", headerf) == 0 )
1069 assassin->set_content_type(headerv);
1071 // Subject: should be stored
1072 if ( cmp_nocase_partial("Subject", headerf) == 0 )
1073 assassin->set_subject(headerv);
1075 // assemble header to be written to SpamAssassin
1076 string header = string(headerf) + ": " + headerv + "\r\n";
1079 // write to SpamAssassin client
1080 assassin->output(header.c_str(),header.size());
1081 } catch (string& problem)
1083 throw_error(problem);
1084 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1086 debug(D_FUNC, "mlfi_header: exit error output");
1087 return SMFIS_TEMPFAIL;
1091 debug(D_FUNC, "mlfi_header: exit");
1093 return SMFIS_CONTINUE;
1097 // Gets called once when the header is finished.
1099 // writes empty line to SpamAssassin client to separate
1100 // headers from body.
1103 mlfi_eoh(SMFICTX* ctx)
1105 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1107 debug(D_FUNC, "mlfi_eoh: enter");
1109 // Check if the SPAMC program has already been run, if not we run it.
1110 if ( !(assassin->connected) )
1113 assassin->connected = 1; // SPAMC is getting ready to run
1114 assassin->Connect();
1116 catch (string& problem) {
1117 throw_error(problem);
1118 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1121 debug(D_FUNC, "mlfi_eoh: exit error connect");
1122 return SMFIS_TEMPFAIL;
1127 // add blank line between header and body
1128 assassin->output("\r\n",2);
1129 } catch (string& problem)
1131 throw_error(problem);
1132 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1135 debug(D_FUNC, "mlfi_eoh: exit error output");
1136 return SMFIS_TEMPFAIL;
1141 debug(D_FUNC, "mlfi_eoh: exit");
1142 return SMFIS_CONTINUE;
1146 // Gets called repeatedly to transmit the body
1148 // writes everything directly to SpamAssassin client
1151 mlfi_body(SMFICTX* ctx, u_char *bodyp, size_t bodylen)
1153 debug(D_FUNC, "mlfi_body: enter");
1154 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1158 assassin->output(bodyp, bodylen);
1159 } catch (string& problem)
1161 throw_error(problem);
1162 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1164 debug(D_FUNC, "mlfi_body: exit error");
1165 return SMFIS_TEMPFAIL;
1169 debug(D_FUNC, "mlfi_body: exit");
1170 return SMFIS_CONTINUE;
1174 // Gets called once at the end of mail processing
1176 // tells SpamAssassin client that the mail is complete
1177 // through EOF and then modifies the mail accordingly by
1178 // calling the "assassinate" function
1181 mlfi_eom(SMFICTX* ctx)
1183 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1186 debug(D_FUNC, "mlfi_eom: enter");
1189 // close output pipe to signal EOF to SpamAssassin
1190 assassin->close_output();
1192 // read what the Assassin is telling us
1195 milter_status = assassinate(ctx, assassin);
1197 // now cleanup the element.
1198 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1201 } catch (string& problem)
1203 throw_error(problem);
1204 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1206 debug(D_FUNC, "mlfi_eom: exit error");
1207 return SMFIS_TEMPFAIL;
1211 debug(D_FUNC, "mlfi_eom: exit");
1212 return milter_status;
1216 // Gets called on session-basis. This keeps things nice & quiet.
1219 mlfi_close(SMFICTX* ctx)
1221 struct context *sctx;
1222 debug(D_FUNC, "mlfi_close");
1224 sctx = (struct context*)smfi_getpriv(ctx);
1226 return SMFIS_ACCEPT;
1231 smfi_setpriv(ctx, NULL);
1233 return SMFIS_ACCEPT;
1237 // Gets called when things are being aborted.
1239 // kills the SpamAssassin object, its destructor should
1240 // take care of everything.
1243 mlfi_abort(SMFICTX* ctx)
1245 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1247 debug(D_FUNC, "mlfi_abort");
1248 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1251 return SMFIS_ACCEPT;
1256 // {{{ SpamAssassin Class
1259 // This is a new constructor for the SpamAssassin object. It simply
1260 // initializes two variables. The original constructor has been
1261 // renamed to Connect().
1263 SpamAssassin::SpamAssassin():
1272 SpamAssassin::~SpamAssassin()
1276 // close all pipes that are still open
1277 if (pipe_io[0][0] > -1) close(pipe_io[0][0]);
1278 if (pipe_io[0][1] > -1) close(pipe_io[0][1]);
1279 if (pipe_io[1][0] > -1) close(pipe_io[1][0]);
1280 if (pipe_io[1][1] > -1) close(pipe_io[1][1]);
1282 // child still running?
1285 // make sure the pid is valid
1290 // wait for child to terminate
1292 waitpid(pid, &status, 0);
1297 // Clean up the recip list. Might be overkill, but it's good housekeeping.
1298 while( !recipients.empty())
1300 recipients.pop_front();
1302 // Clean up the recip list. Might be overkill, but it's good housekeeping.
1303 while( !expandedrcpt.empty())
1305 expandedrcpt.pop_front();
1310 // This is the old SpamAssassin constructor. It has been renamed Connect(),
1311 // and is now called at the beginning of the mlfi_header() function.
1314 void SpamAssassin::Connect()
1316 // set up pipes for in- and output
1317 if (pipe(pipe_io[0]))
1318 throw string(string("pipe error: ")+string(strerror(errno)));
1319 if (pipe(pipe_io[1]))
1320 throw string(string("pipe error: ")+string(strerror(errno)));
1322 // now execute SpamAssassin client for contact with SpamAssassin spamd
1324 // start child process
1325 switch(pid = fork())
1328 // forking trouble. throw error.
1329 throw string(string("fork error: ")+string(strerror(errno)));
1334 // close unused pipes
1335 close(pipe_io[1][0]);
1336 close(pipe_io[0][1]);
1338 // redirect stdin(0), stdout(1) and stderr(2)
1339 dup2(pipe_io[0][0],0);
1340 dup2(pipe_io[1][1],1);
1341 dup2(pipe_io[1][1],2);
1346 // absolute path (determined in autoconf)
1347 // should be a little more secure
1348 // XXX arbitrary 100-argument max
1350 char** argv = (char**) malloc(100*sizeof(char*));
1351 argv[argc++] = SPAMC;
1354 argv[argc++] = "-u";
1355 if ( expandedrcpt.size() != 1 )
1357 // More (or less?) than one recipient, so we pass the default
1358 // username to SPAMC. This way special rules can be defined for
1359 // multi recipient messages.
1360 debug(D_RCPT, "%d recipients; spamc gets default username %s", (int)expandedrcpt.size(), defaultuser);
1361 argv[argc++] = defaultuser;
1364 // There is only 1 recipient so we pass the username
1365 // (converted to lowercase) to SPAMC. Don't worry about
1366 // freeing this memory as we're exec()ing anyhow.
1367 if (flag_full_email)
1368 argv[argc] = strlwr(strdup(full_user().c_str()));
1370 argv[argc] = strlwr(strdup(local_user().c_str()));
1372 debug(D_RCPT, "spamc gets %s", argv[argc]);
1379 argv[argc++] = "-d";
1380 argv[argc++] = spamdhost;
1384 memcpy(argv+argc, spamc_argv, spamc_argc * sizeof(char *));
1389 execvp(argv[0] , argv); // does not return!
1392 throw_error(string("execution error: ")+string(strerror(errno)));
1399 // close unused pipes
1400 close(pipe_io[0][0]);
1401 close(pipe_io[1][1]);
1405 // mark the pipes non-blocking
1406 if(fcntl(pipe_io[0][1], F_SETFL, O_NONBLOCK) == -1)
1407 throw string(string("Cannot set pipe01 nonblocking: ")+string(strerror(errno)));
1408 #if 0 /* don't really need to make the sink pipe nonblocking */
1409 if(fcntl(pipe_io[1][0], F_SETFL, O_NONBLOCK) == -1)
1410 throw string(string("Cannot set pipe10 nonblocking: ")+string(strerror(errno)));
1413 // we have to assume the client is running now.
1416 /* If we have any buffered output, write it now. */
1417 if (outputbuffer.size())
1419 output(outputbuffer);
1424 // write to SpamAssassin
1426 SpamAssassin::output(const void* buffer, long size)
1428 debug(D_FUNC, "::output enter");
1430 debug(D_SPAMC, "output \"%*.*s\"", (int)size, (int)size, (char *)buffer);
1432 // if there are problems, fail.
1434 throw string("tried output despite problems. failed.");
1436 /* If we haven't launched spamc yet, just store the data */
1439 /* Silly C++ can't tell the difference between
1440 (const char*, string::size_type) and
1441 (string::size_type, char), so we have to cast the parameters.
1443 outputbuffer.append((const char *)buffer,(string::size_type)size);
1444 debug(D_FUNC, "::output exit1");
1448 // send to SpamAssassin
1454 struct pollfd fds[2];
1455 int nfds = 2, nready;
1456 fds[0].fd = pipe_io[0][1];
1457 fds[0].events = POLLOUT;
1458 fds[1].fd = pipe_io[1][0];
1459 fds[1].events = POLLIN;
1461 debug(D_POLL, "polling fds %d and %d", pipe_io[0][1], pipe_io[1][0]);
1462 nready = poll(fds, nfds, 1000);
1464 throw("poll failed");
1466 debug(D_POLL, "poll returned %d, fd0=%d, fd1=%d", nready, fds[0].revents, fds[1].revents);
1468 if (fds[1].revents & (POLLERR|POLLNVAL|POLLHUP))
1470 throw string("poll says my read pipe is busted");
1473 if (fds[0].revents & (POLLERR|POLLNVAL|POLLHUP))
1475 throw string("poll says my write pipe is busted");
1478 if (fds[1].revents & POLLIN)
1480 debug(D_POLL, "poll says I can read");
1484 if (fds[0].revents & POLLOUT)
1486 debug(D_POLL, "poll says I can write");
1487 switch(wsize = write(pipe_io[0][1], (char *)buffer + total, size - total))
1490 if (errno == EAGAIN)
1492 reason = string(strerror(errno));
1495 close(pipe_io[0][1]);
1496 close(pipe_io[1][0]);
1507 // wait until child is dead
1508 waitpid(pid, &status, 0);
1510 throw string(string("write error: ")+reason);
1514 debug(D_POLL, "wrote %ld bytes", wsize);
1518 } while ( total < size );
1520 debug(D_FUNC, "::output exit2");
1523 void SpamAssassin::output(const void* buffer)
1525 output(buffer, strlen((const char *)buffer));
1528 void SpamAssassin::output(string buffer)
1530 output(buffer.c_str(), buffer.size());
1533 // close output pipe
1535 SpamAssassin::close_output()
1537 if(close(pipe_io[0][1]))
1538 throw string(string("close error: ")+string(strerror(errno)));
1543 SpamAssassin::input()
1545 debug(D_FUNC, "::input enter");
1546 // if the child has exited or we experienced an error, return
1548 if (!running || error)
1550 debug(D_FUNC, "::input exit1");
1554 // keep reading from input pipe until it is empty
1555 empty_and_close_pipe();
1557 // that's it, we're through
1560 // wait until child is dead
1562 if(waitpid(pid, &status, 0)<0)
1565 throw string(string("waitpid error: ")+string(strerror(errno)));
1567 debug(D_FUNC, "::input exit2");
1571 // return reference to mail
1580 // get values of the different SpamAssassin fields
1583 SpamAssassin::spam_status()
1585 return x_spam_status;
1589 SpamAssassin::spam_flag()
1595 SpamAssassin::spam_report()
1597 return x_spam_report;
1601 SpamAssassin::spam_prev_content_type()
1603 return x_spam_prev_content_type;
1607 SpamAssassin::spam_checker_version()
1609 return x_spam_checker_version;
1613 SpamAssassin::spam_level()
1615 return x_spam_level;
1619 SpamAssassin::content_type()
1621 return _content_type;
1625 SpamAssassin::subject()
1631 SpamAssassin::rcpt()
1637 SpamAssassin::from()
1643 SpamAssassin::connectip()
1650 SpamAssassin::local_user()
1652 // assuming we have a recipient in the form: <username@somehost.somedomain>
1653 // (angle brackets optional) we return 'username'
1654 if (_rcpt[0] == '<')
1655 return _rcpt.substr(1, _rcpt.find_first_of("@+")-1);
1657 return _rcpt.substr(0, _rcpt.find_first_of("@+"));
1661 SpamAssassin::full_user()
1664 // assuming we have a recipient in the form: <username@somehost.somedomain>
1665 // (angle brackets optional) we return 'username@somehost.somedomain'
1666 if (_rcpt[0] == '<')
1667 name = _rcpt.substr(1, _rcpt.find('>')-1);
1670 if(name.find('@') == string::npos)
1672 /* if the name had no domain part (local delivery), append the default one */
1673 name = name + "@" + defaultdomain;
1679 SpamAssassin::numrcpt()
1685 SpamAssassin::set_numrcpt()
1692 SpamAssassin::set_numrcpt(const int val)
1699 // set the values of the different SpamAssassin
1700 // fields in our element. Returns former size of field
1703 SpamAssassin::set_spam_status(const string& val)
1705 string::size_type old = x_spam_status.size();
1706 x_spam_status = val;
1711 SpamAssassin::set_spam_flag(const string& val)
1713 string::size_type old = x_spam_flag.size();
1719 SpamAssassin::set_spam_report(const string& val)
1721 string::size_type old = x_spam_report.size();
1722 x_spam_report = val;
1727 SpamAssassin::set_spam_prev_content_type(const string& val)
1729 string::size_type old = x_spam_prev_content_type.size();
1730 x_spam_prev_content_type = val;
1735 SpamAssassin::set_spam_checker_version(const string& val)
1737 string::size_type old = x_spam_checker_version.size();
1738 x_spam_checker_version = val;
1743 SpamAssassin::set_spam_level(const string& val)
1745 string::size_type old = x_spam_level.size();
1751 SpamAssassin::set_content_type(const string& val)
1753 string::size_type old = _content_type.size();
1754 _content_type = val;
1759 SpamAssassin::set_subject(const string& val)
1761 string::size_type old = _subject.size();
1767 SpamAssassin::set_rcpt(const string& val)
1769 string::size_type old = _rcpt.size();
1775 SpamAssassin::set_from(const string& val)
1777 string::size_type old = _from.size();
1783 SpamAssassin::set_connectip(const string& val)
1785 string::size_type old = _connectip.size();
1791 // Read available output from SpamAssassin client
1794 SpamAssassin::read_pipe()
1801 debug(D_FUNC, "::read_pipe enter");
1803 if (pipe_io[1][0] == -1)
1805 debug(D_FUNC, "::read_pipe exit - shouldn't have been called?");
1809 size = read(pipe_io[1][0], iobuff, 1024);
1814 reason = string(strerror(errno));
1816 // Close remaining pipe.
1817 close(pipe_io[1][0]);
1827 // wait until child is dead
1828 waitpid(pid, &status, 0);
1830 // throw the error message that caused this trouble
1831 throw string(string("read error: ")+reason);
1832 } else if ( size == 0 )
1835 // EOF. Close the pipe
1836 if(close(pipe_io[1][0]))
1837 throw string(string("close error: ")+string(strerror(errno)));
1842 // append to mail buffer
1843 mail.append(iobuff, size);
1844 debug(D_POLL, "read %ld bytes", size);
1845 debug(D_SPAMC, "input \"%*.*s\"", (int)size, (int)size, iobuff);
1847 debug(D_FUNC, "::read_pipe exit");
1852 // Read all output from SpamAssassin client
1853 // and close the pipe
1856 SpamAssassin::empty_and_close_pipe()
1858 debug(D_FUNC, "::empty_and_close_pipe enter");
1861 debug(D_FUNC, "::empty_and_close_pipe exit");
1866 // {{{ Some small subroutines without much relation to functionality
1868 // output error message to syslog facility
1870 throw_error(const string& errmsg)
1873 syslog(LOG_ERR, "Thrown error: %s", errmsg.c_str());
1875 syslog(LOG_ERR, "Unknown error");
1878 /* Takes a comma or space-delimited string of debug tokens and sets the
1879 appropriate bits in flag_debug. "all" sets all the bits.
1881 void parse_debuglevel(char* string)
1885 /* make a copy so we don't overwrite argv[] */
1886 string = strdup(string);
1888 /* handle the old numeric values too */
1889 switch(atoi(string))
1892 flag_debug |= (1<<D_UORI) | (1<<D_STR);
1894 flag_debug |= (1<<D_POLL);
1896 flag_debug |= (1<<D_MISC) | (1<<D_FUNC);
1897 debug(D_ALWAYS, "Setting debug level to 0x%0x", flag_debug);
1904 while ((token = strsep(&string, ", ")))
1907 for (i=0; debugstrings[i]; i++)
1909 if(strcasecmp(token, "ALL")==0)
1911 flag_debug = (1<<D_MAX)-1;
1914 if(strcasecmp(token, debugstrings[i])==0)
1916 flag_debug |= (1<<i);
1921 if (!debugstrings[i])
1923 fprintf(stderr, "Invalid debug token \"%s\"\n", token);
1927 debug(D_ALWAYS, "Setting debug level to 0x%0x", flag_debug);
1932 Output a line to syslog using print format, but only if the appropriate
1933 debug level is set. The D_ALWAYS level is always enabled.
1935 void debug(enum debuglevel level, const char* fmt, ...)
1937 if ((1<<level) & flag_debug)
1939 #if defined(HAVE_VSYSLOG)
1942 vsyslog(LOG_ERR, fmt, vl);
1945 #if defined(HAVE_VASPRINTF)
1952 #if defined(HAVE_VASPRINTF)
1953 vasprintf(&buf, fmt, vl);
1955 #if defined(HAVE_VSNPRINTF)
1956 vsnprintf(buf, sizeof(buf)-1, fmt, vl);
1958 /* XXX possible buffer overflow here; be careful what you pass to debug() */
1959 vsprintf(buf, fmt, vl);
1963 syslog(LOG_ERR, "%s", buf);
1964 #if defined(HAVE_VASPRINTF)
1967 #endif /* vsyslog */
1971 // case-insensitive search
1973 find_nocase(const string& array, const string& pattern, string::size_type start)
1975 string::size_type pos(start);
1977 while (pos < array.size())
1979 string::size_type ctr = 0;
1981 while( (pos+ctr) < array.size() &&
1982 toupper(array[pos+ctr]) == toupper(pattern[ctr]) )
1985 if (ctr == pattern.size())
1987 debug(D_STR, "f_nc: <%s><%s>: hit", array.c_str(), pattern.c_str());
1995 debug(D_STR, "f_nc: <%s><%s>: nohit", array.c_str(), pattern.c_str());
1996 return string::npos;
1999 // compare case-insensitive
2001 cmp_nocase_partial(const string& s, const string& s2)
2003 string::const_iterator p=s.begin();
2004 string::const_iterator p2=s2.begin();
2006 while ( p != s.end() && p2 <= s2.end() ) {
2007 if (toupper(*p) != toupper(*p2))
2009 debug(D_STR, "c_nc_p: <%s><%s> : miss", s.c_str(), s2.c_str());
2010 return (toupper(*p) < toupper(*p2)) ? -1 : 1;
2016 debug(D_STR, "c_nc_p: <%s><%s> : hit", s.c_str(), s2.c_str());
2021 /* closeall() - close all FDs >= a specified value */
2022 void closeall(int fd)
2024 int fdlimit = sysconf(_SC_OPEN_MAX);
2025 while (fd < fdlimit)
2029 void parse_networklist(char *string, struct networklist *list)
2033 /* make a copy so we don't overwrite argv[] */
2034 string = strdup(string);
2036 while ((token = strsep(&string, ", ")))
2038 char *tnet = strsep(&token, "/");
2039 char *tmask = token;
2040 struct in_addr net, mask;
2042 if (list->num_nets % 10 == 0)
2043 list->nets = (struct net*)realloc(list->nets, sizeof(*list->nets) * (list->num_nets + 10));
2045 if (!inet_aton(tnet, &net))
2047 fprintf(stderr, "Could not parse \"%s\" as a network\n", tnet);
2053 if (strchr(tmask, '.') == NULL)
2058 ret = sscanf(tmask, "%u", &bits);
2059 if (ret != 1 || bits > 32)
2061 fprintf(stderr,"%s: bad CIDR value", tmask);
2064 mask.s_addr = htonl(~((1L << (32 - bits)) - 1) & 0xffffffff);
2065 } else if (!inet_aton(tmask, &mask))
2067 fprintf(stderr, "Could not parse \"%s\" as a netmask\n", tmask);
2071 mask.s_addr = 0xffffffff;
2074 char *snet = strdup(inet_ntoa(net));
2075 debug(D_MISC, "Adding %s/%s to network list", snet, inet_ntoa(mask));
2079 net.s_addr = net.s_addr & mask.s_addr;
2080 list->nets[list->num_nets].network = net;
2081 list->nets[list->num_nets].netmask = mask;
2087 int ip_in_networklist(struct in_addr ip, struct networklist *list)
2091 if (list->num_nets == 0)
2094 debug(D_NET, "Checking %s against:", inet_ntoa(ip));
2095 for (i = 0; i < list->num_nets; i++)
2097 debug(D_NET, "%s", inet_ntoa(list->nets[i].network));
2098 debug(D_NET, "/%s", inet_ntoa(list->nets[i].netmask));
2099 if ((ip.s_addr & list->nets[i].netmask.s_addr) == list->nets[i].network.s_addr)
2101 debug(D_NET, "Hit!");
2109 char *strlwr(char *str)
2120 /* Log a message about missing milter macros, but only the first time */
2121 void warnmacro(char *macro, char *scope)
2125 debug(D_ALWAYS, "Could not retrieve sendmail macro \"%s\"!. Please add it to confMILTER_MACROS_%s for better spamassassin results",
2131 untrusted-argument-safe popen function - only supports "r" and "w" modes
2132 for simplicity, and always reads stdout and stderr in "r" mode. Call
2133 fclose to close the FILE.
2135 FILE *popenv(char *const argv[], const char *type, pid_t *pid)
2141 if ((*type != 'r' && *type != 'w') || type[1])
2152 case -1: /* Error. */
2154 (void)close(pdes[0]);
2155 (void)close(pdes[1]);
2159 case 0: /* Child. */
2162 * The dup2() to STDIN_FILENO is repeated to avoid
2163 * writing to pdes[1], which might corrupt the
2164 * parent's copy. This isn't good enough in
2165 * general, since the exit() is no return, so
2166 * the compiler is free to corrupt all the local
2169 (void)close(pdes[0]);
2170 (void)dup2(pdes[1], STDOUT_FILENO);
2171 (void)dup2(pdes[1], STDERR_FILENO);
2172 if (pdes[1] != STDOUT_FILENO && pdes[1] != STDERR_FILENO) {
2173 (void)close(pdes[1]);
2176 if (pdes[0] != STDIN_FILENO) {
2177 (void)dup2(pdes[0], STDIN_FILENO);
2178 (void)close(pdes[0]);
2180 (void)close(pdes[1]);
2182 execv(argv[0], argv);
2187 /* Parent; assume fdopen can't fail. */
2189 iop = fdopen(pdes[0], type);
2190 (void)close(pdes[1]);
2192 iop = fdopen(pdes[1], type);
2193 (void)close(pdes[0]);
2200 // vim6:ai:noexpandtab