3 // $Id: spamass-milter.cpp,v 1.86 2005/02/05 07:03:22 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 1.86 2005/02/05 07:03:22 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;
174 #if defined(__FreeBSD__) /* popen bug - see PR bin/50770 */
175 static pthread_mutex_t popen_mutex = PTHREAD_MUTEX_INITIALIZER;
181 main(int argc, char* argv[])
184 const char *args = "fd:mMp:P:r:u:D:i:Ib:B:e:x";
187 char *pidfilename = NULL;
188 FILE *pidfile = NULL;
190 #ifdef HAVE_VERBOSE_TERMINATE_HANDLER
191 std::set_terminate (__gnu_cxx::__verbose_terminate_handler);
194 openlog("spamass-milter", LOG_PID, LOG_MAIL);
196 /* Process command line options */
197 while ((c = getopt(argc, argv, args)) != -1) {
203 parse_debuglevel(optarg);
206 spamdhost = strdup(optarg);
209 flag_full_email = true;
210 defaultdomain = strdup(optarg);
213 debug(D_MISC, "Parsing ignore list");
214 parse_networklist(optarg, &ignorenets);
217 debug(D_MISC, "Ignore authenticated senders");
218 ignore_authenticated_senders = true;
221 dontmodifyspam = true;
222 smfilter.xxfi_flags &= ~SMFIF_CHGBODY;
226 dontmodifyspam = true;
227 smfilter.xxfi_flags &= ~(SMFIF_CHGBODY|SMFIF_CHGHDRS);
230 sock = strdup(optarg);
233 pidfilename = strdup(optarg);
237 reject_score = atoi(optarg);
240 flag_sniffuser = true;
241 defaultuser = strdup(optarg);
247 fprintf(stderr, "Can only have one -b or -B flag\n");
254 flag_bucket_only = true;
255 smfilter.xxfi_flags |= SMFIF_DELRCPT; // May delete recipients
257 // we will modify the recipient list; if spamc returns
258 // indicating that this mail is spam, the message will be
259 // sent to <optarg>@localhost
260 smfilter.xxfi_flags |= SMFIF_ADDRCPT; // May add recipients
261 // XXX we should probably verify that optarg is vaguely sane
262 spambucket = strdup( optarg );
273 if (flag_full_email && !flag_sniffuser)
275 fprintf(stderr, "-e flag requires -u\n");
279 /* remember the remainer of the arguments so we can pass them to spamc */
280 spamc_argc = argc - optind;
281 spamc_argv = argv + optind;
284 cout << PACKAGE_NAME << " - Version " << PACKAGE_VERSION << endl;
285 cout << "SpamAssassin Sendmail Milter Plugin" << endl;
286 cout << "Usage: spamass-milter -p socket [-b|-B bucket] [-d xx[,yy...]] [-D host]" << endl;
287 cout << " [-e defaultdomain] [-f] [-i networks] [-I] [-m] [-M]" << endl;
288 cout << " [-P pidfile] [-r nn] [-u defaultuser] [-x]" << endl;
289 cout << " [-- spamc args ]" << endl;
290 cout << " -p socket: path to create socket" << endl;
291 cout << " -b bucket: redirect spam to this mail address. The orignal" << endl;
292 cout << " recipient(s) will not receive anything." << endl;
293 cout << " -B bucket: add this mail address as a BCC recipient of spam." << endl;
294 cout << " -d xx[,yy ...]: set debug flags. Logs to syslog" << endl;
295 cout << " -D host: connect to spamd at remote host (deprecated)" << endl;
296 cout << " -e defaultdomain: pass full email address to spamc instead of just\n"
297 " username. Uses 'defaultdomain' if there was none" << endl;
298 cout << " -f: fork into background" << endl;
299 cout << " -i: skip (ignore) checks from these IPs or netblocks" << endl;
300 cout << " example: -i 192.168.12.5,10.0.0.0/8,172.16/255.255.0.0" << endl;
301 cout << " -I: skip (ignore) checks if sender is authenticated" << endl;
302 cout << " -m: don't modify body, Content-type: or Subject:" << endl;
303 cout << " -M: don't modify the message at all" << endl;
304 cout << " -P pidfile: Put processid in pidfile" << endl;
305 cout << " -r nn: reject messages with a score >= nn with an SMTP error.\n"
306 " use -1 to reject any messages tagged by SA." << endl;
307 cout << " -u defaultuser: pass the recipient's username to spamc.\n"
308 " Uses 'defaultuser' if there are multiple recipients." << endl;
309 cout << " -x: pass email address through alias and virtusertable expansion." << endl;
310 cout << " -- spamc args: pass the remaining flags to spamc." << endl;
318 pidfile = fopen(pidfilename,"w");
321 fprintf(stderr, "Could not open pidfile: %s\n", strerror(errno));
324 /* leave the file open through the fork, since we don't know our pid
332 if (daemon(0, 0) == -1)
334 fprintf(stderr, "daemon() failed: %s\n", strerror(errno));
341 fprintf(pidfile, "%ld\n", (long)getpid());
348 if (stat(sock,&junk) == 0) unlink(sock);
351 (void) smfi_setconn(sock);
352 if (smfi_register(smfilter) == MI_FAILURE) {
353 fprintf(stderr, "smfi_register failed\n");
354 exit(EX_UNAVAILABLE);
356 debug(D_MISC, "smfi_register succeeded");
358 debug(D_ALWAYS, "spamass-milter %s starting", PACKAGE_VERSION);
360 debug(D_ALWAYS, "spamass-milter %s exiting", PACKAGE_VERSION);
368 /* Update a header if SA changes it, or add it if it is new. */
369 void update_or_insert(SpamAssassin* assassin, SMFICTX* ctx, string oldstring, t_setter setter, char *header )
371 string::size_type eoh1 = assassin->d().find("\n\n");
372 string::size_type eoh2 = assassin->d().find("\n\r\n");
373 string::size_type eoh = ( eoh1 < eoh2 ? eoh1 : eoh2 );
376 string::size_type oldsize;
378 debug(D_UORI, "u_or_i: looking at <%s>", header);
379 debug(D_UORI, "u_or_i: oldstring: <%s>", oldstring.c_str());
381 newstring = retrieve_field(assassin->d().substr(0, eoh), header);
382 debug(D_UORI, "u_or_i: newstring: <%s>", newstring.c_str());
384 oldsize = callsetter(*assassin,setter)(newstring);
388 if (newstring != oldstring)
390 /* change if old one was present, append if non-null */
391 char* cstr = const_cast<char*>(newstring.c_str());
394 debug(D_UORI, "u_or_i: changing");
395 smfi_chgheader(ctx, header, 1, newstring.size() > 0 ?
397 } else if (newstring.size() > 0)
399 debug(D_UORI, "u_or_i: inserting");
400 smfi_addheader(ctx, header, cstr);
404 debug(D_UORI, "u_or_i: no change");
412 // implement the changes suggested by SpamAssassin for the mail. Returns
413 // the milter error code.
415 assassinate(SMFICTX* ctx, SpamAssassin* assassin)
417 // find end of header (eol in last line of header)
418 // and beginning of body
419 string::size_type eoh1 = assassin->d().find("\n\n");
420 string::size_type eoh2 = assassin->d().find("\n\r\n");
421 string::size_type eoh = (eoh1 < eoh2) ? eoh1 : eoh2;
422 string::size_type bob = assassin->d().find_first_not_of("\r\n", eoh);
424 if (bob == string::npos)
425 bob = assassin->d().size();
427 update_or_insert(assassin, ctx, assassin->spam_flag(), &SpamAssassin::set_spam_flag, "X-Spam-Flag");
428 update_or_insert(assassin, ctx, assassin->spam_status(), &SpamAssassin::set_spam_status, "X-Spam-Status");
430 /* Summarily reject the message if SA tagged it, or if we have a minimum
431 score, reject if it exceeds that score. */
434 bool do_reject = false;
435 if (reject_score == -1 && !assassin->spam_flag().empty())
437 if (reject_score != -1)
440 const char *spam_status = assassin->spam_status().c_str();
441 /* SA 3.0 uses the keyword "score" */
442 rv = sscanf(spam_status,"%*s score=%d", &score);
445 /* SA 2.x uses the keyword "hits" */
446 rv = sscanf(spam_status,"%*s hits=%d", &score);
449 debug(D_ALWAYS, "Could not extract score from <%s>", spam_status);
452 debug(D_MISC, "SA score: %d", score);
453 if (score >= reject_score)
459 debug(D_MISC, "Rejecting");
460 smfi_setreply(ctx, "550", "5.7.1", "Blocked by SpamAssassin");
465 /* If we also want a copy of the spam, shell out to sendmail and
466 send another copy. The milter API will not let you send the
467 message AND return a failure code to the sender, so this is
468 the only way to do it. */
469 #if defined(__FreeBSD__)
473 #if defined(HAVE_ASPRINTF)
478 char *fmt="%s \"%s\"";
481 #if defined(HAVE_ASPRINTF)
482 asprintf(&buf, fmt, SENDMAIL, spambucket);
484 #if defined(HAVE_SNPRINTF)
485 snprintf(buf, sizeof(buf)-1, fmt, SENDMAIL, spambucket);
487 /* XXX possible buffer overflow here */
488 sprintf(buf, fmt, SENDMAIL, spambucket);
492 debug(D_COPY, "calling %s", buf);
493 #if defined(__FreeBSD__) /* popen bug - see PR bin/50770 */
494 rv = pthread_mutex_lock(&popen_mutex);
497 debug(D_ALWAYS, "Could not lock popen mutex: %s", strerror(rv));
504 debug(D_COPY, "popen failed(%s). Will not send a copy to spambucket", strerror(errno));
507 // Send message provided by SpamAssassin
508 fwrite(assassin->d().c_str(), assassin->d().size(), 1, p);
511 #if defined(__FreeBSD__)
512 rv = pthread_mutex_unlock(&popen_mutex);
515 debug(D_ALWAYS, "Could not unlock popen mutex: %s", strerror(rv));
519 #if defined(HAVE_ASPRINTF)
527 /* Drop the message into the spam bucket if it's spam */
529 if (!assassin->spam_flag().empty()) {
530 // first, add the spambucket address
531 if ( smfi_addrcpt( ctx, spambucket ) != MI_SUCCESS ) {
532 throw string( "Failed to add spambucket to recipients" );
534 if (flag_bucket_only) {
535 // Move recipients to a non-active header, one at a
536 // time. Note, this may generate multiple X-Spam-Orig-To
537 // headers, but that's okay.
538 while( !assassin->recipients.empty()) {
539 if ( smfi_addheader( ctx, "X-Spam-Orig-To", (char *)assassin->recipients.front().c_str()) != MI_SUCCESS ) {
540 throw string( "Failed to save recipient" );
543 // It's not 100% important that this succeeds, so we'll just warn on failure rather than bailing out.
544 if ( smfi_delrcpt( ctx, (char *)assassin->recipients.front().c_str()) != MI_SUCCESS ) {
545 // throw_error really just logs a warning as opposed to actually throw()ing
546 debug(D_ALWAYS, "Failed to remove recipient %s from the envelope", assassin->recipients.front().c_str() );
548 assassin->recipients.pop_front();
554 update_or_insert(assassin, ctx, assassin->spam_report(), &SpamAssassin::set_spam_report, "X-Spam-Report");
555 update_or_insert(assassin, ctx, assassin->spam_prev_content_type(), &SpamAssassin::set_spam_prev_content_type, "X-Spam-Prev-Content-Type");
556 update_or_insert(assassin, ctx, assassin->spam_level(), &SpamAssassin::set_spam_level, "X-Spam-Level");
557 update_or_insert(assassin, ctx, assassin->spam_checker_version(), &SpamAssassin::set_spam_checker_version, "X-Spam-Checker-Version");
560 // If SpamAssassin thinks it is spam, replace
565 // However, only issue the header replacement calls if the content has
566 // actually changed. If SA didn't change subject or content-type, don't
567 // replace here unnecessarily.
568 if (!dontmodifyspam && assassin->spam_flag().size()>0)
570 update_or_insert(assassin, ctx, assassin->subject(), &SpamAssassin::set_subject, "Subject");
571 update_or_insert(assassin, ctx, assassin->content_type(), &SpamAssassin::set_content_type, "Content-Type");
573 // Replace body with the one SpamAssassin provided
574 string::size_type body_size = assassin->d().size() - bob;
575 string body=assassin->d().substr(bob, string::npos);
576 if ( smfi_replacebody(ctx, (unsigned char *)body.c_str(), body_size) == MI_FAILURE )
577 throw string("error. could not replace body.");
581 return SMFIS_CONTINUE;
584 // retrieve the content of a specific field in the header
587 old_retrieve_field(const string& header, const string& field)
589 // look for beginning of content
590 string::size_type pos = find_nocase(header, "\n" + field + ": ");
592 // return empty string if not found
593 if (pos == string::npos)
595 debug(D_STR, "r_f: failed");
599 // look for end of field name
600 pos = find_nocase(header, " ", pos) + 1;
602 string::size_type pos2(pos);
605 if (pos2 == find_nocase(header, "\n", pos2))
608 // look for end of content
611 pos2 = find_nocase(header, "\n", pos2+1);
614 while ( pos2 < string::npos &&
615 isspace(header[pos2+1]) );
617 return header.substr(pos, pos2-pos);
621 // retrieve the content of a specific field in the header
624 retrieve_field(const string& header, const string& field)
627 string::size_type field_start = string::npos;
628 string::size_type field_end = string::npos;
629 string::size_type idx = 0;
631 while( field_start == string::npos ) {
632 idx = find_nocase( header, field + ":", idx );
635 if ( idx == string::npos ) {
639 // The string we've found needs to be either at the start of the
640 // headers string, or immediately following a "\n"
642 if ( header[ idx - 1 ] != '\n' ) {
643 idx++; // so we don't get stuck in an infinite loop
644 continue; // loop around again
651 // A mail field starts just after the header. Ideally, there's a
652 // space, but it's possible that there isn't.
653 field_start += field.length() + 1;
654 if ( field_start < ( header.length() - 1 ) && header[ field_start ] == ' ' ) {
658 // See if there's anything left, to shortcut the rest of the
660 if ( field_start == header.length() - 1 ) {
664 // The field continues to the end of line. If the start of the next
665 // line is whitespace, then the field continues.
667 while( field_end == string::npos ) {
668 idx = header.find( "\n", idx );
670 // if we don't find a "\n", gobble everything to the end of the headers
671 if ( idx == string::npos ) {
672 field_end = header.length();
674 // check the next character
675 if (( idx + 1 ) < header.length() && ( isspace( header[ idx + 1 ] ))) {
676 idx ++; // whitespace found, so wrap to the next line
683 /* if the header line ends in \r\n, don't return the \r */
684 if (header[field_end-1] == '\r')
687 // Maybe remove the whitespace picked up when a header wraps - this
688 // might actually be a requirement
689 return header.substr( field_start, field_end - field_start );
695 // {{{ MLFI callbacks
698 // Gets called once when a client connects to sendmail
700 // gets the originating IP address and checks it against the ignore list
701 // if it isn't in the list, store the IP in a structure and store a
702 // pointer to it in the private data area.
705 mlfi_connect(SMFICTX * ctx, char *hostname, _SOCK_ADDR * hostaddr)
707 struct context *sctx;
709 debug(D_FUNC, "mlfi_connect: enter");
711 /* allocate a structure to store the IP address (and SA object) in */
712 sctx = (struct context *)malloc(sizeof(*sctx));
715 /* not a socket; probably a local user calling sendmail directly */
716 /* set to 127.0.0.1 */
717 sctx->connect_ip.s_addr = htonl(INADDR_LOOPBACK);
720 sctx->connect_ip = ((struct sockaddr_in *) hostaddr)->sin_addr;
722 sctx->assassin = NULL;
725 /* store a pointer to it with setpriv */
726 smfi_setpriv(ctx, sctx);
728 if (ip_in_networklist(sctx->connect_ip, &ignorenets))
730 debug(D_NET, "%s is in our ignore list - accepting message",
731 inet_ntoa(sctx->connect_ip));
732 debug(D_FUNC, "mlfi_connect: exit ignore");
736 // Tell Milter to continue
737 debug(D_FUNC, "mlfi_connect: exit");
739 return SMFIS_CONTINUE;
743 // Gets called on every "HELO"
745 // stores the result in the context structure
747 sfsistat mlfi_helo(SMFICTX * ctx, char * helohost)
749 struct context *sctx = (struct context*)smfi_getpriv(ctx);
752 sctx->helo = strdup(helohost);
754 return SMFIS_CONTINUE;
758 // Gets called first for all messages
760 // creates SpamAssassin object and makes pointer to it
761 // private data of this filter process
764 mlfi_envfrom(SMFICTX* ctx, char** envfrom)
766 SpamAssassin* assassin;
767 struct context *sctx = (struct context *)smfi_getpriv(ctx);
770 if (ignore_authenticated_senders)
774 auth_authen = smfi_getsymval(ctx, "{auth_authen}");
775 debug(D_MISC, "auth_authen=%s", auth_authen ?: "<unauthenticated>");
779 debug(D_MISC, "sender authenticated (%s) - accepting message",
781 debug(D_FUNC, "mlfi_envfrom: exit ignore");
786 debug(D_FUNC, "mlfi_envfrom: enter");
788 // launch new SpamAssassin
789 assassin=new SpamAssassin;
790 } catch (string& problem)
792 throw_error(problem);
793 return SMFIS_TEMPFAIL;
796 assassin->set_connectip(string(inet_ntoa(sctx->connect_ip)));
798 // Store a pointer to the assassin object in our context struct
799 sctx->assassin = assassin;
801 // remember the MAIL FROM address
802 assassin->set_from(string(envfrom[0]));
804 queueid=smfi_getsymval(ctx,"i");
807 assassin->queueid = queueid;
809 debug(D_MISC, "queueid=%s", queueid);
811 // tell Milter to continue
812 debug(D_FUNC, "mlfi_envfrom: exit");
814 return SMFIS_CONTINUE;
818 // Gets called once for each recipient
820 // stores the first recipient in the spamassassin object and
821 // stores all addresses and the number thereof (some redundancy)
826 mlfi_envrcpt(SMFICTX* ctx, char** envrcpt)
828 struct context *sctx = (struct context*)smfi_getpriv(ctx);
829 SpamAssassin* assassin = sctx->assassin;
831 #if defined(__FreeBSD__)
835 debug(D_FUNC, "mlfi_envrcpt: enter");
839 /* open a pipe to sendmail so we can do address expansion */
842 char *fmt="%s -bv \"%s\" 2>&1";
844 #if defined(HAVE_SNPRINTF)
845 snprintf(buf, sizeof(buf)-1, fmt, SENDMAIL, envrcpt[0]);
847 /* XXX possible buffer overflow here */
848 sprintf(buf, fmt, SENDMAIL, envrcpt[0]);
851 debug(D_RCPT, "calling %s", buf);
853 #if defined(__FreeBSD__) /* popen bug - see PR bin/50770 */
854 rv = pthread_mutex_lock(&popen_mutex);
857 debug(D_ALWAYS, "Could not lock popen mutex: %s", strerror(rv));
865 debug(D_RCPT, "popen failed(%s). Will not expand aliases", strerror(errno));
866 assassin->expandedrcpt.push_back(envrcpt[0]);
869 while (fgets(buf, sizeof(buf), p) != NULL)
872 /* strip trailing EOLs */
873 while (i > 0 && buf[i - 1] <= ' ')
876 debug(D_RCPT, "sendmail output: %s", buf);
877 /* From a quick scan of the sendmail source, a valid email
878 address gets printed via either
879 "deliverable: mailer %s, host %s, user %s"
880 or "deliverable: mailer %s, user %s"
882 if (strstr(buf, "... deliverable: mailer "))
884 char *p=strstr(buf,", user ");
885 /* anything after ", user " is the email address */
886 debug(D_RCPT, "user: %s", p+7);
887 assassin->expandedrcpt.push_back(p+7);
892 #if defined(__FreeBSD__)
893 rv = pthread_mutex_unlock(&popen_mutex);
896 debug(D_ALWAYS, "Could not unlock popen mutex: %s", strerror(rv));
902 assassin->expandedrcpt.push_back(envrcpt[0]);
904 debug(D_RCPT, "Total of %d actual recipients", (int)assassin->expandedrcpt.size());
906 if (assassin->numrcpt() == 0)
908 /* Send the envelope headers as X-Envelope-From: and
909 X-Envelope-To: so that SpamAssassin can use them in its
910 whitelist checks. Also forge as complete a dummy
911 Received: header as possible because SA gets a lot of
914 HReceived: $?sfrom $s $.$?_($?s$|from $.$_)
915 $.$?{auth_type}(authenticated$?{auth_ssf} bits=${auth_ssf}$.)
916 $.by $j ($v/$Z)$?r with $r$. id $i$?{tls_version}
917 (version=${tls_version} cipher=${cipher} bits=${cipher_bits} verify=${verify})$.$?u
923 const char *macro_b, *macro_s, *macro_j, *macro__;
925 /* Failure to fetch {b} is not fatal. Without this date SA can't do
926 future/past validation on the Date: header, but sendmail doesn't
927 default to allow milters to see it.
929 macro_b = smfi_getsymval(ctx, "b");
931 /* Sendmail currently cannot pass us the {s} macro, but
932 I do not know why. Leave this in for the day sendmail is
933 fixed. Until that day, use the value remembered by
936 macro_s = smfi_getsymval(ctx, "s");
938 macro_s = sctx->helo;
942 /* FQDN of this site */
943 macro_j = smfi_getsymval(ctx, "j");
945 macro_j = "localhost";
947 /* Sending site's address */
948 macro__ = smfi_getsymval(ctx, "_");
952 assassin->output((string)"X-Envelope-From: "+assassin->from()+"\r\n");
953 assassin->output((string)"X-Envelope-To: "+envrcpt[0]+"\r\n");
956 assassin->output((string)"Received: from "+macro_s+" ("+macro__+") by "+macro_j+";\r\n");
958 assassin->output((string)"Received: from "+macro_s+" ("+macro__+") by "+macro_j+"; "+macro_b+"\r\n");
961 assassin->output((string)"X-Envelope-To: "+envrcpt[0]+"\r\n");
963 /* increment RCPT TO: count */
964 assassin->set_numrcpt();
966 /* If we expanded to at least one user and we haven't recorded one yet,
967 record the first one */
968 if (!assassin->expandedrcpt.empty() && (assassin->rcpt().size() == 0))
970 debug(D_RCPT, "remembering %s for spamc", assassin->expandedrcpt.front().c_str());
971 assassin->set_rcpt(assassin->expandedrcpt.front());
974 debug(D_RCPT, "remembering recipient %s", envrcpt[0]);
975 assassin->recipients.push_back( envrcpt[0] ); // XXX verify that this worked
977 debug(D_FUNC, "mlfi_envrcpt: exit");
979 return SMFIS_CONTINUE;
983 // Gets called repeatedly for all header fields
985 // assembles the headers and passes them on to the SpamAssassin client
988 // only exception: SpamAssassin header fields (X-Spam-*) get suppressed
989 // but are being stored in the SpamAssassin element.
991 // this function also starts the connection with the SPAMC program the
992 // first time it is called.
996 mlfi_header(SMFICTX* ctx, char* headerf, char* headerv)
998 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
999 debug(D_FUNC, "mlfi_header: enter");
1001 // Check if the SPAMC program has already been run, if not we run it.
1002 if ( !(assassin->connected) )
1005 assassin->connected = 1; // SPAMC is getting ready to run
1006 assassin->Connect();
1008 catch (string& problem) {
1009 throw_error(problem);
1010 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1012 debug(D_FUNC, "mlfi_header: exit error connect");
1013 return SMFIS_TEMPFAIL;
1017 // Is it a "X-Spam-" header field?
1018 if ( cmp_nocase_partial("X-Spam-", headerf) == 0 )
1021 // memorize content of old fields
1023 if ( cmp_nocase_partial("X-Spam-Status", headerf) == 0 )
1024 assassin->set_spam_status(headerv);
1025 else if ( cmp_nocase_partial("X-Spam-Flag", headerf) == 0 )
1026 assassin->set_spam_flag(headerv);
1027 else if ( cmp_nocase_partial("X-Spam-Report", headerf) == 0 )
1028 assassin->set_spam_report(headerv);
1029 else if ( cmp_nocase_partial("X-Spam-Prev-Content-Type", headerf) == 0 )
1030 assassin->set_spam_prev_content_type(headerv);
1031 else if ( cmp_nocase_partial("X-Spam-Level", headerf) == 0 )
1032 assassin->set_spam_level(headerv);
1033 else if ( cmp_nocase_partial("X-Spam-Checker-Version", headerf) == 0 )
1034 assassin->set_spam_checker_version(headerv);
1037 /* Hm. X-Spam header, but not one we recognize. Pass it through. */
1043 debug(D_FUNC, "mlfi_header: suppress");
1044 return SMFIS_CONTINUE;
1048 // Content-Type: will be stored if present
1049 if ( cmp_nocase_partial("Content-Type", headerf) == 0 )
1050 assassin->set_content_type(headerv);
1052 // Subject: should be stored
1053 if ( cmp_nocase_partial("Subject", headerf) == 0 )
1054 assassin->set_subject(headerv);
1056 // assemble header to be written to SpamAssassin
1057 string header = string(headerf) + ": " + headerv + "\r\n";
1060 // write to SpamAssassin client
1061 assassin->output(header.c_str(),header.size());
1062 } catch (string& problem)
1064 throw_error(problem);
1065 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1067 debug(D_FUNC, "mlfi_header: exit error output");
1068 return SMFIS_TEMPFAIL;
1072 debug(D_FUNC, "mlfi_header: exit");
1074 return SMFIS_CONTINUE;
1078 // Gets called once when the header is finished.
1080 // writes empty line to SpamAssassin client to separate
1081 // headers from body.
1084 mlfi_eoh(SMFICTX* ctx)
1086 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1088 debug(D_FUNC, "mlfi_eoh: enter");
1090 // Check if the SPAMC program has already been run, if not we run it.
1091 if ( !(assassin->connected) )
1094 assassin->connected = 1; // SPAMC is getting ready to run
1095 assassin->Connect();
1097 catch (string& problem) {
1098 throw_error(problem);
1099 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1102 debug(D_FUNC, "mlfi_eoh: exit error connect");
1103 return SMFIS_TEMPFAIL;
1108 // add blank line between header and body
1109 assassin->output("\r\n",2);
1110 } catch (string& problem)
1112 throw_error(problem);
1113 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1116 debug(D_FUNC, "mlfi_eoh: exit error output");
1117 return SMFIS_TEMPFAIL;
1122 debug(D_FUNC, "mlfi_eoh: exit");
1123 return SMFIS_CONTINUE;
1127 // Gets called repeatedly to transmit the body
1129 // writes everything directly to SpamAssassin client
1132 mlfi_body(SMFICTX* ctx, u_char *bodyp, size_t bodylen)
1134 debug(D_FUNC, "mlfi_body: enter");
1135 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1139 assassin->output(bodyp, bodylen);
1140 } catch (string& problem)
1142 throw_error(problem);
1143 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1145 debug(D_FUNC, "mlfi_body: exit error");
1146 return SMFIS_TEMPFAIL;
1150 debug(D_FUNC, "mlfi_body: exit");
1151 return SMFIS_CONTINUE;
1155 // Gets called once at the end of mail processing
1157 // tells SpamAssassin client that the mail is complete
1158 // through EOF and then modifies the mail accordingly by
1159 // calling the "assassinate" function
1162 mlfi_eom(SMFICTX* ctx)
1164 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1167 debug(D_FUNC, "mlfi_eom: enter");
1170 // close output pipe to signal EOF to SpamAssassin
1171 assassin->close_output();
1173 // read what the Assassin is telling us
1176 milter_status = assassinate(ctx, assassin);
1178 // now cleanup the element.
1179 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1182 } catch (string& problem)
1184 throw_error(problem);
1185 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1187 debug(D_FUNC, "mlfi_eom: exit error");
1188 return SMFIS_TEMPFAIL;
1192 debug(D_FUNC, "mlfi_eom: exit");
1193 return milter_status;
1197 // Gets called on session-basis. This keeps things nice & quiet.
1200 mlfi_close(SMFICTX* ctx)
1202 struct context *sctx;
1203 debug(D_FUNC, "mlfi_close");
1205 sctx = (struct context*)smfi_getpriv(ctx);
1208 /* the context should have been set in mlfi_connect */
1209 debug(D_ALWAYS, "NULL context in mlfi_close! Should not happen!");
1210 return SMFIS_ACCEPT;
1215 smfi_setpriv(ctx, NULL);
1217 return SMFIS_ACCEPT;
1221 // Gets called when things are being aborted.
1223 // kills the SpamAssassin object, its destructor should
1224 // take care of everything.
1227 mlfi_abort(SMFICTX* ctx)
1229 SpamAssassin* assassin = ((struct context *)smfi_getpriv(ctx))->assassin;
1231 debug(D_FUNC, "mlfi_abort");
1232 ((struct context *)smfi_getpriv(ctx))->assassin=NULL;
1235 return SMFIS_ACCEPT;
1240 // {{{ SpamAssassin Class
1243 // This is a new constructor for the SpamAssassin object. It simply
1244 // initializes two variables. The original constructor has been
1245 // renamed to Connect().
1247 SpamAssassin::SpamAssassin():
1256 SpamAssassin::~SpamAssassin()
1260 // close all pipes that are still open
1261 if (pipe_io[0][0] > -1) close(pipe_io[0][0]);
1262 if (pipe_io[0][1] > -1) close(pipe_io[0][1]);
1263 if (pipe_io[1][0] > -1) close(pipe_io[1][0]);
1264 if (pipe_io[1][1] > -1) close(pipe_io[1][1]);
1266 // child still running?
1269 // make sure the pid is valid
1274 // wait for child to terminate
1276 waitpid(pid, &status, 0);
1281 // Clean up the recip list. Might be overkill, but it's good housekeeping.
1282 while( !recipients.empty())
1284 recipients.pop_front();
1286 // Clean up the recip list. Might be overkill, but it's good housekeeping.
1287 while( !expandedrcpt.empty())
1289 expandedrcpt.pop_front();
1294 // This is the old SpamAssassin constructor. It has been renamed Connect(),
1295 // and is now called at the beginning of the mlfi_header() function.
1298 void SpamAssassin::Connect()
1300 // set up pipes for in- and output
1301 if (pipe(pipe_io[0]))
1302 throw string(string("pipe error: ")+string(strerror(errno)));
1303 if (pipe(pipe_io[1]))
1304 throw string(string("pipe error: ")+string(strerror(errno)));
1306 // now execute SpamAssassin client for contact with SpamAssassin spamd
1308 // start child process
1309 switch(pid = fork())
1312 // forking trouble. throw error.
1313 throw string(string("fork error: ")+string(strerror(errno)));
1318 // close unused pipes
1319 close(pipe_io[1][0]);
1320 close(pipe_io[0][1]);
1322 // redirect stdin(0), stdout(1) and stderr(2)
1323 dup2(pipe_io[0][0],0);
1324 dup2(pipe_io[1][1],1);
1325 dup2(pipe_io[1][1],2);
1330 // absolute path (determined in autoconf)
1331 // should be a little more secure
1332 // XXX arbitrary 100-argument max
1334 char** argv = (char**) malloc(100*sizeof(char*));
1335 argv[argc++] = SPAMC;
1338 argv[argc++] = "-u";
1339 if ( expandedrcpt.size() != 1 )
1341 // More (or less?) than one recipient, so we pass the default
1342 // username to SPAMC. This way special rules can be defined for
1343 // multi recipient messages.
1344 debug(D_RCPT, "%d recipients; spamc gets default username %s", (int)expandedrcpt.size(), defaultuser);
1345 argv[argc++] = defaultuser;
1348 // There is only 1 recipient so we pass the username
1349 // (converted to lowercase) to SPAMC. Don't worry about
1350 // freeing this memory as we're exec()ing anyhow.
1351 if (flag_full_email)
1352 argv[argc] = strlwr(strdup(full_user().c_str()));
1354 argv[argc] = strlwr(strdup(local_user().c_str()));
1356 debug(D_RCPT, "spamc gets %s", argv[argc]);
1363 argv[argc++] = "-d";
1364 argv[argc++] = spamdhost;
1368 memcpy(argv+argc, spamc_argv, spamc_argc * sizeof(char *));
1373 execvp(argv[0] , argv); // does not return!
1376 throw_error(string("execution error: ")+string(strerror(errno)));
1383 // close unused pipes
1384 close(pipe_io[0][0]);
1385 close(pipe_io[1][1]);
1389 // mark the pipes non-blocking
1390 if(fcntl(pipe_io[0][1], F_SETFL, O_NONBLOCK) == -1)
1391 throw string(string("Cannot set pipe01 nonblocking: ")+string(strerror(errno)));
1392 #if 0 /* don't really need to make the sink pipe nonblocking */
1393 if(fcntl(pipe_io[1][0], F_SETFL, O_NONBLOCK) == -1)
1394 throw string(string("Cannot set pipe10 nonblocking: ")+string(strerror(errno)));
1397 // we have to assume the client is running now.
1400 /* If we have any buffered output, write it now. */
1401 if (outputbuffer.size())
1403 output(outputbuffer);
1408 // write to SpamAssassin
1410 SpamAssassin::output(const void* buffer, long size)
1412 debug(D_FUNC, "::output enter");
1414 debug(D_SPAMC, "output \"%*.*s\"", (int)size, (int)size, (char *)buffer);
1416 // if there are problems, fail.
1418 throw string("tried output despite problems. failed.");
1420 /* If we haven't launched spamc yet, just store the data */
1423 /* Silly C++ can't tell the difference between
1424 (const char*, string::size_type) and
1425 (string::size_type, char), so we have to cast the parameters.
1427 outputbuffer.append((const char *)buffer,(string::size_type)size);
1428 debug(D_FUNC, "::output exit1");
1432 // send to SpamAssassin
1438 struct pollfd fds[2];
1439 int nfds = 2, nready;
1440 fds[0].fd = pipe_io[0][1];
1441 fds[0].events = POLLOUT;
1442 fds[1].fd = pipe_io[1][0];
1443 fds[1].events = POLLIN;
1445 debug(D_POLL, "polling fds %d and %d", pipe_io[0][1], pipe_io[1][0]);
1446 nready = poll(fds, nfds, 1000);
1448 throw("poll failed");
1450 debug(D_POLL, "poll returned %d, fd0=%d, fd1=%d", nready, fds[0].revents, fds[1].revents);
1452 if (fds[1].revents & (POLLERR|POLLNVAL|POLLHUP))
1454 throw string("poll says my read pipe is busted");
1457 if (fds[0].revents & (POLLERR|POLLNVAL|POLLHUP))
1459 throw string("poll says my write pipe is busted");
1462 if (fds[1].revents & POLLIN)
1464 debug(D_POLL, "poll says I can read");
1468 if (fds[0].revents & POLLOUT)
1470 debug(D_POLL, "poll says I can write");
1471 switch(wsize = write(pipe_io[0][1], (char *)buffer + total, size - total))
1474 if (errno == EAGAIN)
1476 reason = string(strerror(errno));
1479 close(pipe_io[0][1]);
1480 close(pipe_io[1][0]);
1491 // wait until child is dead
1492 waitpid(pid, &status, 0);
1494 throw string(string("write error: ")+reason);
1498 debug(D_POLL, "wrote %ld bytes", wsize);
1502 } while ( total < size );
1504 debug(D_FUNC, "::output exit2");
1507 void SpamAssassin::output(const void* buffer)
1509 output(buffer, strlen((const char *)buffer));
1512 void SpamAssassin::output(string buffer)
1514 output(buffer.c_str(), buffer.size());
1517 // close output pipe
1519 SpamAssassin::close_output()
1521 if(close(pipe_io[0][1]))
1522 throw string(string("close error: ")+string(strerror(errno)));
1527 SpamAssassin::input()
1529 debug(D_FUNC, "::input enter");
1530 // if the child has exited or we experienced an error, return
1532 if (!running || error)
1534 debug(D_FUNC, "::input exit1");
1538 // keep reading from input pipe until it is empty
1539 empty_and_close_pipe();
1541 // that's it, we're through
1544 // wait until child is dead
1546 if(waitpid(pid, &status, 0)<0)
1549 throw string(string("waitpid error: ")+string(strerror(errno)));
1551 debug(D_FUNC, "::input exit2");
1555 // return reference to mail
1564 // get values of the different SpamAssassin fields
1567 SpamAssassin::spam_status()
1569 return x_spam_status;
1573 SpamAssassin::spam_flag()
1579 SpamAssassin::spam_report()
1581 return x_spam_report;
1585 SpamAssassin::spam_prev_content_type()
1587 return x_spam_prev_content_type;
1591 SpamAssassin::spam_checker_version()
1593 return x_spam_checker_version;
1597 SpamAssassin::spam_level()
1599 return x_spam_level;
1603 SpamAssassin::content_type()
1605 return _content_type;
1609 SpamAssassin::subject()
1615 SpamAssassin::rcpt()
1621 SpamAssassin::from()
1627 SpamAssassin::connectip()
1634 SpamAssassin::local_user()
1636 // assuming we have a recipient in the form: <username@somehost.somedomain>
1637 // (angle brackets optional) we return 'username'
1638 if (_rcpt[0] == '<')
1639 return _rcpt.substr(1, _rcpt.find_first_of("@+")-1);
1641 return _rcpt.substr(0, _rcpt.find_first_of("@+"));
1645 SpamAssassin::full_user()
1648 // assuming we have a recipient in the form: <username@somehost.somedomain>
1649 // (angle brackets optional) we return 'username@somehost.somedomain'
1650 if (_rcpt[0] == '<')
1651 name = _rcpt.substr(1, _rcpt.find('>')-1);
1654 if(name.find('@') == string::npos)
1656 /* if the name had no domain part (local delivery), append the default one */
1657 name = name + "@" + defaultdomain;
1663 SpamAssassin::numrcpt()
1669 SpamAssassin::set_numrcpt()
1676 SpamAssassin::set_numrcpt(const int val)
1683 // set the values of the different SpamAssassin
1684 // fields in our element. Returns former size of field
1687 SpamAssassin::set_spam_status(const string& val)
1689 string::size_type old = x_spam_status.size();
1690 x_spam_status = val;
1695 SpamAssassin::set_spam_flag(const string& val)
1697 string::size_type old = x_spam_flag.size();
1703 SpamAssassin::set_spam_report(const string& val)
1705 string::size_type old = x_spam_report.size();
1706 x_spam_report = val;
1711 SpamAssassin::set_spam_prev_content_type(const string& val)
1713 string::size_type old = x_spam_prev_content_type.size();
1714 x_spam_prev_content_type = val;
1719 SpamAssassin::set_spam_checker_version(const string& val)
1721 string::size_type old = x_spam_checker_version.size();
1722 x_spam_checker_version = val;
1727 SpamAssassin::set_spam_level(const string& val)
1729 string::size_type old = x_spam_level.size();
1735 SpamAssassin::set_content_type(const string& val)
1737 string::size_type old = _content_type.size();
1738 _content_type = val;
1743 SpamAssassin::set_subject(const string& val)
1745 string::size_type old = _subject.size();
1751 SpamAssassin::set_rcpt(const string& val)
1753 string::size_type old = _rcpt.size();
1759 SpamAssassin::set_from(const string& val)
1761 string::size_type old = _from.size();
1767 SpamAssassin::set_connectip(const string& val)
1769 string::size_type old = _connectip.size();
1775 // Read available output from SpamAssassin client
1778 SpamAssassin::read_pipe()
1785 debug(D_FUNC, "::read_pipe enter");
1787 if (pipe_io[1][0] == -1)
1789 debug(D_FUNC, "::read_pipe exit - shouldn't have been called?");
1793 size = read(pipe_io[1][0], iobuff, 1024);
1798 reason = string(strerror(errno));
1800 // Close remaining pipe.
1801 close(pipe_io[1][0]);
1811 // wait until child is dead
1812 waitpid(pid, &status, 0);
1814 // throw the error message that caused this trouble
1815 throw string(string("read error: ")+reason);
1816 } else if ( size == 0 )
1819 // EOF. Close the pipe
1820 if(close(pipe_io[1][0]))
1821 throw string(string("close error: ")+string(strerror(errno)));
1826 // append to mail buffer
1827 mail.append(iobuff, size);
1828 debug(D_POLL, "read %ld bytes", size);
1829 debug(D_SPAMC, "input \"%*.*s\"", (int)size, (int)size, iobuff);
1831 debug(D_FUNC, "::read_pipe exit");
1836 // Read all output from SpamAssassin client
1837 // and close the pipe
1840 SpamAssassin::empty_and_close_pipe()
1842 debug(D_FUNC, "::empty_and_close_pipe enter");
1845 debug(D_FUNC, "::empty_and_close_pipe exit");
1850 // {{{ Some small subroutines without much relation to functionality
1852 // output error message to syslog facility
1854 throw_error(const string& errmsg)
1857 syslog(LOG_ERR, "Thrown error: %s", errmsg.c_str());
1859 syslog(LOG_ERR, "Unknown error");
1862 /* Takes a comma or space-delimited string of debug tokens and sets the
1863 appropriate bits in flag_debug. "all" sets all the bits.
1865 void parse_debuglevel(char* string)
1869 /* make a copy so we don't overwrite argv[] */
1870 string = strdup(string);
1872 /* handle the old numeric values too */
1873 switch(atoi(string))
1876 flag_debug |= (1<<D_UORI) | (1<<D_STR);
1878 flag_debug |= (1<<D_POLL);
1880 flag_debug |= (1<<D_MISC) | (1<<D_FUNC);
1881 debug(D_ALWAYS, "Setting debug level to 0x%0x", flag_debug);
1888 while ((token = strsep(&string, ", ")))
1891 for (i=0; debugstrings[i]; i++)
1893 if(strcasecmp(token, "ALL")==0)
1895 flag_debug = (1<<D_MAX)-1;
1898 if(strcasecmp(token, debugstrings[i])==0)
1900 flag_debug |= (1<<i);
1905 if (!debugstrings[i])
1907 fprintf(stderr, "Invalid debug token \"%s\"\n", token);
1911 debug(D_ALWAYS, "Setting debug level to 0x%0x", flag_debug);
1916 Output a line to syslog using print format, but only if the appropriate
1917 debug level is set. The D_ALWAYS level is always enabled.
1919 void debug(enum debuglevel level, const char* fmt, ...)
1921 if ((1<<level) & flag_debug)
1923 #if defined(HAVE_VSYSLOG)
1926 vsyslog(LOG_ERR, fmt, vl);
1929 #if defined(HAVE_VASPRINTF)
1936 #if defined(HAVE_VASPRINTF)
1937 vasprintf(&buf, fmt, vl);
1939 #if defined(HAVE_VSNPRINTF)
1940 vsnprintf(buf, sizeof(buf)-1, fmt, vl);
1942 /* XXX possible buffer overflow here; be careful what you pass to debug() */
1943 vsprintf(buf, fmt, vl);
1947 syslog(LOG_ERR, "%s", buf);
1948 #if defined(HAVE_VASPRINTF)
1951 #endif /* vsyslog */
1955 // case-insensitive search
1957 find_nocase(const string& array, const string& pattern, string::size_type start)
1959 string::size_type pos(start);
1961 while (pos < array.size())
1963 string::size_type ctr = 0;
1965 while( (pos+ctr) < array.size() &&
1966 toupper(array[pos+ctr]) == toupper(pattern[ctr]) )
1969 if (ctr == pattern.size())
1971 debug(D_STR, "f_nc: <%s><%s>: hit", array.c_str(), pattern.c_str());
1979 debug(D_STR, "f_nc: <%s><%s>: nohit", array.c_str(), pattern.c_str());
1980 return string::npos;
1983 // compare case-insensitive
1985 cmp_nocase_partial(const string& s, const string& s2)
1987 string::const_iterator p=s.begin();
1988 string::const_iterator p2=s2.begin();
1990 while ( p != s.end() && p2 != s2.end() ) {
1991 if (toupper(*p) != toupper(*p2))
1993 debug(D_STR, "c_nc_p: <%s><%s> : miss", s.c_str(), s2.c_str());
1994 return (toupper(*p) < toupper(*p2)) ? -1 : 1;
2000 debug(D_STR, "c_nc_p: <%s><%s> : hit", s.c_str(), s2.c_str());
2005 /* closeall() - close all FDs >= a specified value */
2006 void closeall(int fd)
2008 int fdlimit = sysconf(_SC_OPEN_MAX);
2009 while (fd < fdlimit)
2013 void parse_networklist(char *string, struct networklist *list)
2017 /* make a copy so we don't overwrite argv[] */
2018 string = strdup(string);
2020 while ((token = strsep(&string, ", ")))
2022 char *tnet = strsep(&token, "/");
2023 char *tmask = token;
2024 struct in_addr net, mask;
2026 if (list->num_nets % 10 == 0)
2027 list->nets = (struct net*)realloc(list->nets, sizeof(*list->nets) * (list->num_nets + 10));
2029 if (!inet_aton(tnet, &net))
2031 fprintf(stderr, "Could not parse \"%s\" as a network\n", tnet);
2037 if (strchr(tmask, '.') == NULL)
2042 ret = sscanf(tmask, "%u", &bits);
2043 if (ret != 1 || bits > 32)
2045 fprintf(stderr,"%s: bad CIDR value", tmask);
2048 mask.s_addr = htonl(~((1L << (32 - bits)) - 1) & 0xffffffff);
2049 } else if (!inet_aton(tmask, &mask))
2051 fprintf(stderr, "Could not parse \"%s\" as a netmask\n", tmask);
2055 mask.s_addr = 0xffffffff;
2058 char *snet = strdup(inet_ntoa(net));
2059 debug(D_MISC, "Adding %s/%s to network list", snet, inet_ntoa(mask));
2063 net.s_addr = net.s_addr & mask.s_addr;
2064 list->nets[list->num_nets].network = net;
2065 list->nets[list->num_nets].netmask = mask;
2071 int ip_in_networklist(struct in_addr ip, struct networklist *list)
2075 if (list->num_nets == 0)
2078 debug(D_NET, "Checking %s against:", inet_ntoa(ip));
2079 for (i = 0; i < list->num_nets; i++)
2081 debug(D_NET, "%s", inet_ntoa(list->nets[i].network));
2082 debug(D_NET, "/%s", inet_ntoa(list->nets[i].netmask));
2083 if ((ip.s_addr & list->nets[i].netmask.s_addr) == list->nets[i].network.s_addr)
2085 debug(D_NET, "Hit!");
2093 char *strlwr(char *str)
2105 // vim6:ai:noexpandtab