2 * driver.c -- generic driver for mail fetch method protocols
4 * Copyright 1997 by Eric S. Raymond
5 * For license terms, see the file COPYING in this directory.
16 #endif /* HAVE_MEMORY_H */
17 #if defined(STDC_HEADERS)
20 #if defined(HAVE_UNISTD_H)
23 #if defined(HAVE_STDARG_H)
28 #if defined(HAVE_ALLOCA_H)
31 #if defined(HAVE_SYS_ITIMER_H)
32 #include <sys/itimer.h>
37 #ifdef HAVE_GETHOSTBYNAME
40 #endif /* HAVE_GETHOSTBYNAME */
43 #if defined (__bsdi__)
44 #include <des.h> /* order of includes matters */
46 #define krb_get_err_text(e) (krb_err_txt[e])
48 #if defined(__FreeBSD__)
49 #define krb_get_err_text(e) (krb_err_txt[e])
55 #endif /* ! defined (__FreeBSD__) */
56 #endif /* ! defined (__bsdi__) */
57 #include <netinet/in.h>
59 #endif /* KERBEROS_V4 */
60 #include "fetchmail.h"
64 /* BSD portability hack...I know, this is an ugly place to put it */
65 #if !defined(SIGCHLD) && defined(SIGCLD)
66 #define SIGCHLD SIGCLD
69 #define SMTP_PORT 25 /* standard SMTP service port */
71 extern char *strstr(); /* needed on sysV68 R3V7.1. */
73 int fetchlimit; /* how often to tear down the server connection */
74 int batchcount; /* count of messages sent in current batch */
75 flag peek_capable; /* can we peek for better error recovery? */
77 static const struct method *protocol;
78 static jmp_buf restart;
82 #define GENSYM (sprintf(tag, "a%04d", ++tagnum), tag)
84 static char *shroud; /* string to shroud in debug output, if non-NULL */
85 static int mytimeout; /* value of nonreponse timeout */
86 static int msglen; /* actual message length */
88 static void set_timeout(int timeleft)
89 /* reset the nonresponse-timeout */
91 struct itimerval ntimeout;
93 ntimeout.it_interval.tv_sec = ntimeout.it_interval.tv_usec = 0;
94 ntimeout.it_value.tv_sec = timeleft;
95 ntimeout.it_value.tv_usec = 0;
96 setitimer(ITIMER_REAL, &ntimeout, (struct itimerval *)NULL);
99 static void timeout_handler (int signal)
100 /* handle server-timeout SIGALRM signal */
105 #define XMIT_ACCEPT 1
106 #define XMIT_REJECT 2
107 #define XMIT_ANTISPAM 3
108 static int accept_count, reject_count;
110 #ifdef HAVE_RES_SEARCH
113 static int is_host_alias(const char *name, struct query *ctl)
114 /* determine whether name is a DNS alias of the hostname */
117 struct mxentry *mxp, *mxrecords;
119 struct hostdata *lead_server =
120 ctl->server.lead_server ? ctl->server.lead_server : &ctl->server;
123 * The first two checks are optimizations that will catch a good
126 * (1) check against the `true name' deduced from the poll label
127 * and the via option (if present) at the beginning of the poll cycle.
128 * Odds are good this will either be the mailserver's FQDN or a suffix of
129 * it with the mailserver's domain's default host name omitted.
131 * (2) Then check the rest of the `also known as'
132 * cache accumulated by previous DNS checks. This cache is primed
133 * by the aka list option.
135 * Any of these on a mail address is definitive. Only if the
136 * name doesn't match any is it time to call the bind library.
137 * If this happens odds are good we're looking at an MX name.
139 if (strcmp(lead_server->truename, name) == 0)
141 else if (str_in_list(&lead_server->akalist, name))
143 else if (!ctl->server.dns)
147 * We know DNS service was up at the beginning of this poll cycle.
148 * If it's down, our nameserver has crashed. We don't want to try
149 * delivering the current message or anything else from this
150 * mailbox until it's back up.
152 else if ((he = gethostbyname(name)) != (struct hostent *)NULL)
154 if (strcmp(ctl->server.truename, he->h_name) == 0)
162 case HOST_NOT_FOUND: /* specified host is unknown */
163 case NO_ADDRESS: /* valid, but does not have an IP address */
166 case NO_RECOVERY: /* non-recoverable name server error */
167 case TRY_AGAIN: /* temporary error on authoritative server */
169 if (outlevel != O_SILENT)
170 putchar('\n'); /* terminate the progress message */
172 "nameserver failure while looking for `%s' during poll of %s.",
173 name, ctl->server.pollname);
179 * We're only here if DNS was OK but the gethostbyname() failed
180 * with a HOST_NOT_FOUND or NO_ADDRESS error.
181 * Search for a name match on MX records pointing to the server.
184 if ((mxrecords = getmxrecords(name)) == (struct mxentry *)NULL)
188 case HOST_NOT_FOUND: /* specified host is unknown */
189 case NO_ADDRESS: /* valid, but does not have an IP address */
193 case NO_RECOVERY: /* non-recoverable name server error */
194 case TRY_AGAIN: /* temporary error on authoritative server */
197 "nameserver failure while looking for `%s' during poll of %s.",
198 name, ctl->server.pollname);
205 for (mxp = mxrecords; mxp->name; mxp++)
206 if (strcmp(ctl->server.truename, mxp->name) == 0)
212 /* add this name to relevant server's `also known as' list */
213 save_str(&lead_server->akalist, -1, name);
217 static void map_name(name, ctl, xmit_names)
218 /* add given name to xmit_names if it matches declared localnames */
219 const char *name; /* name to map */
220 struct query *ctl; /* list of permissible aliases */
221 struct idlist **xmit_names; /* list of recipient names parsed out */
225 lname = idpair_find(&ctl->localnames, name);
226 if (!lname && ctl->wildcard)
229 if (lname != (char *)NULL)
231 if (outlevel == O_VERBOSE)
232 error(0, 0, "mapped %s to local %s", name, lname);
233 save_str(xmit_names, XMIT_ACCEPT, lname);
238 void find_server_names(hdr, ctl, xmit_names)
239 /* parse names out of a RFC822 header into an ID list */
240 const char *hdr; /* RFC822 header in question */
241 struct query *ctl; /* list of permissible aliases */
242 struct idlist **xmit_names; /* list of recipient names parsed out */
244 if (hdr == (char *)NULL)
250 if ((cp = nxtaddr(hdr)) != (char *)NULL)
254 if ((atsign = strchr(cp, '@')))
259 * Does a trailing segment of the hostname match something
260 * on the localdomains list? If so, save the whole name
263 for (idp = ctl->server.localdomains; idp; idp = idp->next)
267 rhs = atsign + (strlen(atsign) - strlen(idp->id));
268 if ((rhs[-1] == '.' || rhs[-1] == '@')
269 && strcasecmp(rhs, idp->id) == 0)
271 if (outlevel == O_VERBOSE)
272 error(0, 0, "passed through %s matching %s",
274 save_str(xmit_names, XMIT_ACCEPT, cp);
281 * Check to see if the right-hand part is an alias
282 * or MX equivalent of the mailserver. If it's
283 * not, skip this name. If it is, we'll keep
284 * going and try to find a mapping to a client name.
286 if (!is_host_alias(atsign+1, ctl))
288 save_str(xmit_names, XMIT_REJECT, cp);
295 map_name(cp, ctl, xmit_names);
297 ((cp = nxtaddr((char *)NULL)) != (char *)NULL);
301 static char *parse_received(struct query *ctl, char *bufp)
302 /* try to extract real addressee from the Received line */
304 char *ok = (char *)NULL;
305 static char rbuf[HOSTLEN + USERNAMELEN + 4];
308 * Try to extract the real envelope addressee. We look here
309 * specifically for the mailserver's Received line.
310 * Note: this will only work for sendmail, or an MTA that
311 * shares sendmail's convention for embedding the envelope
312 * address in the Received line. Sendmail itself only
313 * does this when the mail has a single recipient.
315 if ((ok = strstr(bufp, "by ")) && isspace(ok[-1]))
319 /* extract space-delimited token after "by " */
320 for (sp = ok + 3; isspace(*sp); sp++)
323 for (; !isspace(*sp); sp++)
328 * If it's a DNS name of the mail server, look for the
329 * recipient name after a following "for". Otherwise
332 if (!is_host_alias(rbuf, ctl))
334 else if ((ok = strstr(sp, "for ")) && isspace(ok[-1]))
340 while (*sp && *sp != '>' && *sp != '@' && *sp != ';')
345 /* uh oh -- whitespace here can't be right! */
357 if (outlevel == O_VERBOSE)
358 error(0, 0, "found Received address `%s'", rbuf);
362 #endif /* HAVE_RES_SEARCH */
364 static int smtp_open(struct query *ctl)
365 /* try to open a socket to the appropriate SMTP server for this query */
367 /* maybe it's time to close the socket in order to force delivery */
368 if (ctl->batchlimit > 0 && (ctl->smtp_socket != -1) && batchcount++ == ctl->batchlimit)
370 close(ctl->smtp_socket);
371 ctl->smtp_socket = -1;
375 /* if no socket to any SMTP host is already set up, try to open one */
376 if (ctl->smtp_socket == -1)
379 * RFC 1123 requires that the domain name in HELO address is a
380 * "valid principal domain name" for the client host. We
381 * violate this with malice aforethought in order to make the
382 * Received headers and logging look right.
384 * In fact this code relies on the RFC1123 requirement that the
385 * SMTP listener must accept messages even if verification of the
386 * HELO name fails (RFC1123 section 5.2.5, paragraph 2).
388 * How we compute the true mailhost name to pass to the
389 * listener doesn't affect behavior on RFC1123- violating
390 * listener that check for name match; we're going to lose
391 * on those anyway because we can never give them a name
392 * that matches the local machine fetchmail is running on.
393 * What it will affect is the listener's logging.
399 /* run down the SMTP hunt list looking for a server that's up */
400 for (idp = ctl->smtphunt; idp; idp = idp->next)
402 ctl->smtphost = idp->id; /* remember last host tried. */
404 if ((ctl->smtp_socket = SockOpen(idp->id,SMTP_PORT)) == -1)
407 if (SMTP_ok(ctl->smtp_socket) == SM_OK &&
408 SMTP_ehlo(ctl->smtp_socket,
409 ctl->server.truename,
410 &ctl->server.esmtp_options) == SM_OK)
414 * RFC 1869 warns that some listeners hang up on a failed EHLO,
415 * so it's safest not to assume the socket will still be good.
417 close(ctl->smtp_socket);
418 ctl->smtp_socket = -1;
420 /* if opening for ESMTP failed, try SMTP */
421 if ((ctl->smtp_socket = SockOpen(idp->id,SMTP_PORT)) == -1)
424 if (SMTP_ok(ctl->smtp_socket) == SM_OK &&
425 SMTP_helo(ctl->smtp_socket, ctl->server.truename) == SM_OK)
428 close(ctl->smtp_socket);
429 ctl->smtp_socket = -1;
433 if (outlevel >= O_VERBOSE && ctl->smtp_socket != -1)
434 error(0, 0, "forwarding to SMTP port on %s", ctl->smtphost);
436 return(ctl->smtp_socket);
439 /* these are shared by stuffline, readheaders and readbody */
441 static RETSIGTYPE (*sigchld)();
442 static int sizeticker;
444 static int stuffline(struct query *ctl, char *buf)
445 /* ship a line to the given control block's output sink (SMTP server or MDA) */
449 /* fix message lines that have only \n termination (for qmail) */
452 char *cp = buf + strlen(buf) - 1;
454 if (*cp == '\n' && (cp == buf || cp[-1] != '\r'))
463 * SMTP byte-stuffing. We only do this if the protocol does *not*
464 * use .<CR><LF> as EOM. If it does, the server will already have
465 * decorated any . lines it sends back up.
467 if (!protocol->delimited && *buf == '.')
468 if (sinkfp && ctl->mda)
470 else if (ctl->smtp_socket != -1)
471 SockWrite(ctl->smtp_socket, buf, 1);
473 /* we may need to strip carriage returns */
478 for (sp = tp = buf; *sp; sp++)
486 n = fwrite(buf, 1, strlen(buf), sinkfp);
487 else if (ctl->smtp_socket != -1)
488 n = SockWrite(ctl->smtp_socket, buf, strlen(buf));
493 static int readheaders(sock, len, ctl, realname, num)
494 /* read message headers and ship to SMTP or MDA */
495 int sock; /* to which the server is connected */
496 long len; /* length of message */
497 struct query *ctl; /* query control record */
498 char *realname; /* real name of host */
499 int num; /* index of message */
504 struct addrblk *next;
505 } *addrchain = NULL, **chainptr = &addrchain;
506 char buf[MSGBUFSIZE+1], return_path[MSGBUFSIZE+1];
507 int from_offs, ctt_offs, env_offs, next_address;
508 char *headers, *received_for, *desthost;
509 int n, linelen, oldlen, ch, remaining;
511 struct idlist *idp, *xmit_names;
512 flag good_addresses, bad_addresses, has_nuls;
513 #ifdef HAVE_RES_SEARCH
514 flag no_local_matches = FALSE;
515 #endif /* HAVE_RES_SEARCH */
518 next_address = sizeticker = 0;
520 return_path[0] = '\0';
521 olderrs = ctl->errcount;
523 /* read message headers */
524 headers = received_for = NULL;
525 from_offs = ctt_offs = env_offs = -1;
529 for (remaining = len; remaining > 0 || protocol->delimited; remaining -= linelen)
533 line = xmalloc(sizeof(buf));
537 if ((n = SockRead(sock, buf, sizeof(buf)-1)) == -1)
542 /* lines may not be properly CRLF terminated; fix this for qmail */
545 cp = buf + strlen(buf) - 1;
546 if (*cp == '\n' && (cp == buf || cp[-1] != '\r'))
554 set_timeout(ctl->server.timeout);
556 line = (char *) realloc(line, strlen(line) + strlen(buf) +1);
559 if (line[0] == '\r' && line[1] == '\n')
562 /* we may need to grab RFC822 continuations */
563 ((ch = SockPeek(sock)) == ' ' || ch == '\t');
565 /* write the message size dots */
566 if ((outlevel > O_SILENT && outlevel < O_VERBOSE) && linelen > 0)
568 sizeticker += linelen;
569 while (sizeticker >= SIZETICKER)
572 sizeticker -= SIZETICKER;
576 if (linelen != strlen(line))
579 /* check for end of headers; don't save terminating line */
580 if (line[0] == '\r' && line[1] == '\n')
587 * The University of Washington IMAP server (the reference
588 * implementation of IMAP4 written by Mark Crispin) relies
589 * on being able to keep base-UID information in a special
590 * message at the head of the mailbox. This message should
591 * neither be deleted nor forwarded.
595 * We disable this check under POP2 because there's no way to
596 * prevent deletion of the message. So at least we ought to
597 * forward it to the user so he or she will have some clue
598 * that things have gone awry.
600 if (protocol->port != 109)
601 #endif /* POP2_ENABLE */
602 if (num == 1 && !strncasecmp(line, "X-IMAP:", 7))
606 * This code prevents fetchmail from becoming an accessory after
607 * the fact to upstream sendmails with the `E' option on. This
608 * can result in an escaped Unix From_ line at the beginning of
609 * the headers. If fetchmail just passes it through, the client
610 * listener may think the message has *no* headers (since the first)
611 * line it sees doesn't look RFC822-conformant) and fake up a set.
613 * What the user would see in this case is bogus (synthesized)
614 * headers, followed by a blank line, followed by the >From,
615 * followed by the real headers, followed by a blank line,
618 * We forestall this lossage by tossing anything that looks
619 * like an escaped From_ line in headers. These aren't RFC822
620 * so our conscience is clear...
622 if (!strncasecmp(line, ">From ", 6))
629 * If we see a Status line, it may have been inserted by an MUA
630 * on the mail host, or it may have been inserted by the server
631 * program after the headers in the transaction stream. This
632 * can actually hose some new-mail notifiers such as xbuffy,
633 * which assumes any Status line came from a *local* MDA and
634 * therefore indicates that the message has been seen.
636 * Some buggy POP servers (including at least the 3.3(20)
637 * version of the one distributed with IMAP) insert empty
638 * Status lines in the transaction stream; we'll chuck those
639 * unconditionally. Nonempty ones get chucked if the user
640 * turns on the dropstatus flag.
642 if (!strncasecmp(line, "Status:", 7))
646 for (cp = line + 7; *cp && isspace(*cp); cp++)
649 if (!*cp || ctl->dropstatus)
657 * OK, this is messy. If we're forwarding by SMTP, it's the
658 * SMTP-receiver's job (according to RFC821, page 22, section
659 * 4.1.1) to generate a Return-Path line on final delivery.
660 * The trouble is, we've already got one because the
661 * mailserver's SMTP thought *it* was responsible for final
664 * Stash away the contents of Return-Path for use in generating
665 * MAIL FROM later on, then prevent the header from being saved
666 * with the others. In effect, we strip it off here.
668 * If the SMTP server conforms to the standards, and fetchmail gets the
669 * envelope sender from the Return-Path, the new Return-Path should be
670 * exactly the same as the original one.
672 if (!ctl->mda && !strncasecmp("Return-Path:", line, 12))
674 strcpy(return_path, nxtaddr(line));
680 line = reply_hack(line, realname);
684 oldlen = strlen(line);
685 headers = xmalloc(oldlen + 1);
686 (void) strcpy(headers, line);
694 newlen = oldlen + strlen(line);
695 headers = (char *) realloc(headers, newlen + 1);
698 strcpy(headers + oldlen, line);
700 line = headers + oldlen;
704 if (from_offs == -1 && !strncasecmp("From:", line, 5))
705 from_offs = (line - headers);
706 else if (from_offs == -1 && !strncasecmp("Resent-From:", line, 12))
707 from_offs = (line - headers);
708 else if (from_offs == -1 && !strncasecmp("Apparently-From:", line, 16))
709 from_offs = (line - headers);
710 else if (!strncasecmp("Content-Transfer-Encoding:", line, 26))
711 ctt_offs = (line - headers);
712 else if (!strncasecmp("Message-Id:", buf, 11 ))
714 if( ctl->server.uidl )
717 sscanf( buf+12, "%s", id);
718 if( !str_in_list( &ctl->newsaved, id ) )
719 save_str(&ctl->newsaved, num, id );
723 else if (!MULTIDROP(ctl))
726 else if (!strncasecmp("To:", line, 3)
727 || !strncasecmp("Cc:", line, 3)
728 || !strncasecmp("Bcc:", line, 4))
730 *chainptr = xmalloc(sizeof(struct addrblk));
731 (*chainptr)->offset = (line - headers);
732 chainptr = &(*chainptr)->next;
736 else if (ctl->server.envelope != STRING_DISABLED)
738 if (ctl->server.envelope
739 && strcasecmp(ctl->server.envelope, "received"))
741 if (env_offs == -1 && !strncasecmp(ctl->server.envelope,
743 strlen(ctl->server.envelope)))
744 env_offs = (line - headers);
746 #ifdef HAVE_RES_SEARCH
747 else if (!received_for && !strncasecmp("Received:", line, 9))
748 received_for = parse_received(ctl, line);
749 #endif /* HAVE_RES_SEARCH */
754 * Hack time. If the first line of the message was blank, with no headers
755 * (this happens occasionally due to bad gatewaying software) cons up
756 * a set of fake headers.
758 * If you modify the fake header template below, be sure you don't
759 * make either From or To address @-less, otherwise the reply_hack
760 * logic will do bad things.
762 if (headers == (char *)NULL)
765 "From: <FETCHMAIL-DAEMON@%s>\r\nTo: %s@localhost\r\nSubject: Headerless mail from %s's mailbox on %s\r\n",
766 fetchmailhost, user, ctl->remotename, realname);
767 headers = xstrdup(buf);
771 * We can now process message headers before reading the text.
772 * In fact we have to, as this will tell us where to forward to.
775 /* cons up a list of local recipients */
776 xmit_names = (struct idlist *)NULL;
777 bad_addresses = good_addresses = accept_count = reject_count = 0;
778 #ifdef HAVE_RES_SEARCH
779 /* is this a multidrop box? */
782 if (env_offs > -1) /* We have the actual envelope addressee */
783 find_server_names(headers + env_offs, ctl, &xmit_names);
784 else if (received_for)
786 * We have the Received for addressee.
787 * It has to be a mailserver address, or we
788 * wouldn't have got here.
790 map_name(received_for, ctl, &xmit_names);
796 * We haven't extracted the envelope address.
797 * So check all the header addresses.
801 register struct addrblk *nextptr;
803 find_server_names(headers+addrchain->offset, ctl, &xmit_names);
804 nextptr = addrchain->next;
811 no_local_matches = TRUE;
812 save_str(&xmit_names, XMIT_ACCEPT, user);
813 if (outlevel == O_VERBOSE)
815 "no local matches, forwarding to %s",
819 else /* it's a single-drop box, use first localname */
820 #endif /* HAVE_RES_SEARCH */
821 save_str(&xmit_names, XMIT_ACCEPT, ctl->localnames->id);
825 * Time to either address the message or decide we can't deliver it yet.
827 if (ctl->errcount > olderrs) /* there were DNS errors above */
829 if (outlevel == O_VERBOSE)
830 error(0,0, "forwarding and deletion suppressed due to DNS errors");
832 return(PS_TRANSIENT);
834 else if (ctl->mda) /* we have a declared MDA */
839 desthost = "localhost";
842 * We go through this in order to be able to handle very
843 * long lists of users and (re)implement %s.
845 for (idp = xmit_names; idp; idp = idp->next)
846 if (idp->val.num == XMIT_ACCEPT)
848 length += (strlen(idp->id) + 1);
851 names = (char *)alloca(length);
853 for (idp = xmit_names; idp; idp = idp->next)
854 if (idp->val.num == XMIT_ACCEPT)
856 strcat(names, idp->id);
859 cmd = (char *)alloca(strlen(ctl->mda) + length);
860 sprintf(cmd, ctl->mda, names);
861 if (outlevel == O_VERBOSE)
862 error(0, 0, "about to deliver with: %s", cmd);
866 * Arrange to run with user's permissions if we're root.
867 * This will initialize the ownership of any files the
868 * MDA creates properly. (The seteuid call is available
869 * under all BSDs and Linux)
872 #endif /* HAVE_SETEUID */
874 sinkfp = popen(cmd, "w");
877 /* this will fail quietly if we didn't start as root */
879 #endif /* HAVE_SETEUID */
883 error(0, 0, "MDA open failed");
887 sigchld = signal(SIGCHLD, SIG_DFL);
891 char *ap, *ctt, options[MSGBUFSIZE], addr[128];
893 /* build a connection to the SMTP listener */
894 if ((smtp_open(ctl) == -1))
896 error(0, errno, "SMTP connect to %s failed",
897 ctl->smtphost ? ctl->smtphost : "localhost");
898 free_str_list(&xmit_names);
903 * Compute ESMTP options. It's a kluge to use nxtaddr()
904 * here because the contents of the Content-Transfer-Encoding
905 * headers isn't semantically an address. But it has the
906 * desired tokenizing effect.
909 if (ctl->server.esmtp_options & ESMTP_8BITMIME)
911 sprintf(options, " BODY=8BITMIME");
912 else if ((ctt_offs >= 0) && (ctt = nxtaddr(headers + ctt_offs)))
914 if (!strcasecmp(ctt,"7BIT"))
915 sprintf(options, " BODY=7BIT");
916 else if (!strcasecmp(ctt,"8BIT"))
917 sprintf(options, " BODY=8BITMIME");
919 if ((ctl->server.esmtp_options & ESMTP_SIZE))
920 sprintf(options + strlen(options), " SIZE=%ld", len);
923 * If there is a Return-Path address on the message, this was
924 * almost certainly the MAIL FROM address given the originating
925 * sendmail. This is the best thing to use for logging the
926 * message origin (it sets up the right behavior for bounces and
927 * mailing lists). Otherwise, take the From address.
929 * Try to get the SMTP listener to take the Return-Path or
930 * From address as MAIL FROM . If it won't, fall back on the
931 * calling-user ID. This won't affect replies, which use the
932 * header From address anyway.
934 * RFC 1123 requires that the domain name part of the
935 * MAIL FROM address be "canonicalized", that is a
936 * FQDN or MX but not a CNAME. We'll assume the From
937 * header is already in this form here (it certainly
938 * is if rewrite is on). RFC 1123 is silent on whether
939 * a nonexistent hostname part is considered canonical.
941 * This is a potential problem if the MTAs further upstream
942 * didn't pass canonicalized From/Return-Path lines, *and* the
943 * local SMTP listener insists on them.
948 else if (from_offs == -1 || !(ap = nxtaddr(headers + from_offs)))
950 if (SMTP_from(ctl->smtp_socket, ap, options) != SM_OK)
952 int smtperr = atoi(smtp_response);
955 * Suppress error message only if the response specifically
956 * means `excluded for policy reasons'. We *should* see
957 * an error when the return code is less specific.
959 if (smtperr >= 400 && smtperr != 571)
960 error(0, -1, "SMTP error: %s", smtp_response);
964 case 571: /* sendmail's "unsolicited email refused" */
965 case 501: /* exim's old antispam response */
966 case 550: /* exim's new antispam response (temporary) */
968 * SMTP listener explicitly refuses to deliver
969 * mail coming from this address, probably due
970 * to an anti-spam domain exclusion. Respect
971 * this. Don't try to ship the message, and
972 * don't prevent it from being deleted.
977 case 452: /* insufficient system storage */
979 * Temporary out-of-queue-space condition on the
980 * ESMTP server. Don't try to ship the message,
981 * and suppress deletion so it can be retried on
982 * a future retrieval cycle.
984 SMTP_rset(ctl->smtp_socket); /* required by RFC1870 */
986 return(PS_TRANSIENT);
988 case 552: /* message exceeds fixed maximum message size */
990 * Permanent no-go condition on the
991 * ESMTP server. Don't try to ship the message,
992 * and allow it to be deleted.
994 SMTP_rset(ctl->smtp_socket); /* required by RFC1870 */
998 default: /* retry with invoking user's address */
999 if (SMTP_from(ctl->smtp_socket, user, options) != SM_OK)
1001 error(0, -1, "SMTP error: %s", smtp_response);
1003 return(PS_SMTP); /* should never happen */
1009 * Now list the recipient addressees
1011 * RFC 1123 requires that the domain name part of the
1012 * RCPT TO address be "canonicalized", that is a FQDN
1013 * or MX but not a CNAME. Some listeners (like exim)
1016 desthost = ctl->smtphost ? ctl->smtphost : "localhost";
1017 for (idp = xmit_names; idp; idp = idp->next)
1018 if (idp->val.num == XMIT_ACCEPT)
1020 if (strchr(idp->id, '@'))
1021 strcpy(addr, idp->id);
1023 #ifdef HAVE_SNPRINTF
1024 snprintf(addr, sizeof(addr)-1, "%s@%s", idp->id, desthost);
1026 sprintf(addr, "%s@%s", idp->id, desthost);
1027 #endif /* HAVE_SNPRINTF */
1029 if (SMTP_rcpt(ctl->smtp_socket, addr) == SM_OK)
1034 idp->val.num = XMIT_ANTISPAM;
1036 "SMTP listener doesn't like recipient address `%s'", idp->id);
1039 if (!good_addresses)
1041 #ifdef HAVE_SNPRINTF
1042 snprintf(addr, sizeof(addr)-1, "%s@%s", user, desthost);
1044 sprintf(addr, "%s@%s", user, desthost);
1045 #endif /* HAVE_SNPRINTF */
1047 if (SMTP_rcpt(ctl->smtp_socket, addr) != SM_OK)
1049 error(0, 0, "can't even send to calling user!");
1055 /* tell it we're ready to send data */
1056 SMTP_data(ctl->smtp_socket);
1060 /* utter any per-message Received information we need here */
1062 sprintf(buf, "Received: from %s\n", ctl->server.truename);
1063 if (stuffline(ctl, buf) != -1)
1065 sprintf(buf, "\tby %s (fetchmail-%s %s run by %s)\n",
1070 if (stuffline(ctl, buf) != -1)
1075 if (good_addresses == 0)
1078 "for <%s@%s> (by default); ",
1081 else if (good_addresses == 1)
1083 for (idp = xmit_names; idp; idp = idp->next)
1084 if (idp->val.num == XMIT_ACCEPT)
1085 break; /* only report first address */
1086 sprintf(buf+1, "for <%s@%s> (%s); ",
1088 MULTIDROP(ctl) ? "multi-drop" : "single-drop");
1094 strcat(buf, ctime(&now));
1095 n = stuffline(ctl, buf);
1099 /* ship out the synthetic Received line and the headers */
1100 if (n == -1 || stuffline(ctl, headers) < 0)
1102 error(0, errno, "writing RFC822 headers");
1106 signal(SIGCHLD, sigchld);
1110 else if (outlevel == O_VERBOSE)
1113 /* write error notifications */
1114 #ifdef HAVE_RES_SEARCH
1115 if (no_local_matches || has_nuls || bad_addresses)
1117 if (has_nuls || bad_addresses)
1118 #endif /* HAVE_RES_SEARCH */
1121 char errhd[USERNAMELEN + POPBUFSIZE], *errmsg;
1124 (void) strcpy(errhd, "X-Fetchmail-Warning: ");
1125 #ifdef HAVE_RES_SEARCH
1126 if (no_local_matches)
1128 if (reject_count != 1)
1129 strcat(errhd, "no recipient addresses matched declared local names");
1132 for (idp = xmit_names; idp; idp = idp->next)
1133 if (idp->val.num == XMIT_REJECT)
1135 sprintf(errhd+strlen(errhd), "recipient address %s didn't match any local name", idp->id);
1138 #endif /* HAVE_RES_SEARCH */
1142 if (errhd[sizeof("X-Fetchmail-Warning: ")])
1143 strcat(errhd, "; ");
1144 strcat(errhd, "message has embedded NULs");
1149 if (errhd[sizeof("X-Fetchmail-Warning: ")])
1150 strcat(errhd, "; ");
1151 strcat(errhd, "SMTP listener rejected local recipient addresses: ");
1152 errlen = strlen(errhd);
1153 for (idp = xmit_names; idp; idp = idp->next)
1154 if (idp->val.num == XMIT_ANTISPAM)
1155 errlen += strlen(idp->id) + 2;
1157 errmsg = alloca(errlen+3);
1158 (void) strcpy(errmsg, errhd);
1159 for (idp = xmit_names; idp; idp = idp->next)
1160 if (idp->val.num == XMIT_ANTISPAM)
1162 strcat(errmsg, idp->id);
1164 strcat(errmsg, ", ");
1169 strcat(errmsg, "\n");
1171 /* ship out the error line */
1173 stuffline(ctl, errmsg);
1176 free_str_list(&xmit_names);
1178 /* issue the delimiter line */
1183 stuffline(ctl, buf);
1188 static int readbody(sock, ctl, forward, len)
1189 /* read and dispose of a message body presented on sock */
1190 struct query *ctl; /* query control record */
1191 int sock; /* to which the server is connected */
1192 int len; /* length of message */
1193 flag forward; /* TRUE to forward */
1196 char buf[MSGBUFSIZE+1], *cp;
1198 /* pass through the text lines */
1199 while (protocol->delimited || len > 0)
1201 if ((linelen = SockRead(sock, buf, sizeof(buf)-1)) == -1)
1206 signal(SIGCHLD, sigchld);
1210 set_timeout(ctl->server.timeout);
1212 /* write the message size dots */
1215 sizeticker += linelen;
1216 while (sizeticker >= SIZETICKER)
1218 if (outlevel > O_SILENT)
1220 sizeticker -= SIZETICKER;
1225 /* check for end of message */
1226 if (protocol->delimited && *buf == '.')
1227 if (buf[1] == '\r' && buf[2] == '\n' && buf[3] == '\0')
1229 else if (buf[1] == '\n' && buf[2] == '\0')
1232 msglen--; /* subtract the size of the dot escape */
1236 /* ship out the text line */
1239 int n = stuffline(ctl, buf);
1243 error(0, errno, "writing message text");
1247 signal(SIGCHLD, sigchld);
1251 else if (outlevel == O_VERBOSE)
1261 kerberos_auth (socket, canonical)
1262 /* authenticate to the server host using Kerberos V4 */
1263 int socket; /* socket to server host */
1265 char *canonical; /* server name */
1267 const char *canonical; /* server name */
1270 char * host_primary;
1274 Key_schedule schedule;
1277 ticket = ((KTEXT) (malloc (sizeof (KTEXT_ST))));
1278 rem = (krb_sendauth (0L, socket, ticket, "pop",
1280 ((char *) (krb_realmofhost (canonical))),
1281 ((unsigned long) 0),
1285 ((struct sockaddr_in *) 0),
1286 ((struct sockaddr_in *) 0),
1289 if (rem != KSUCCESS)
1291 error(0, -1, "kerberos error %s", (krb_get_err_text (rem)));
1292 return (PS_AUTHFAIL);
1296 #endif /* KERBEROS_V4 */
1298 int do_protocol(ctl, proto)
1299 /* retrieve messages from server using given protocol method table */
1300 struct query *ctl; /* parsed options with merged-in defaults */
1301 const struct method *proto; /* protocol method table */
1303 int ok, js, pst, sock = -1;
1304 char *msg, *cp, realname[HOSTLEN];
1308 if (ctl->server.preauthenticate == A_KERBEROS_V4)
1310 error(0, -1, "Kerberos V4 support not linked.");
1313 #endif /* KERBEROS_V4 */
1315 /* lacking methods, there are some options that may fail */
1318 /* check for unsupported options */
1321 "Option --flush is not supported with %s",
1325 else if (ctl->fetchall) {
1327 "Option --all is not supported with %s",
1332 if (!proto->getsizes && ctl->limit)
1335 "Option --limit is not supported with %s",
1342 tag[0] = '\0'; /* nuke any tag hanging out from previous query */
1344 error_init(poll_interval == 0 && !logfile);
1346 /* set up the server-nonresponse timeout */
1347 sigsave = signal(SIGALRM, timeout_handler);
1348 set_timeout(mytimeout = ctl->server.timeout);
1350 if ((js = setjmp(restart)) == 1)
1353 "timeout after %d seconds waiting for %s.",
1354 ctl->server.timeout, ctl->server.pollname);
1355 if (ctl->smtp_socket != -1)
1356 close(ctl->smtp_socket);
1363 char buf [POPBUFSIZE+1], *sp, *realhost;
1364 int *msgsizes, len, num, count, new, deletions = 0;
1368 /* execute pre-initialization command, if any */
1369 if (ctl->preconnect && (ok = system(ctl->preconnect)))
1371 sprintf(buf, "pre-connection command failed with status %d", ok);
1377 /* open a socket to the mail server */
1378 port = ctl->server.port ? ctl->server.port : protocol->port;
1379 realhost = ctl->server.via ? ctl->server.via : ctl->server.pollname;
1380 if ((sock = SockOpen(realhost, port)) == -1)
1382 #ifndef EHOSTUNREACH
1383 #define EHOSTUNREACH (-1)
1385 if (outlevel == O_VERBOSE || errno != EHOSTUNREACH)
1387 error_build("fetchmail: %s connection to %s failed: ",
1388 protocol->name, ctl->server.pollname);
1389 if (h_errno == HOST_NOT_FOUND)
1390 error_complete(0, 0, "host is unknown");
1391 else if (h_errno == NO_ADDRESS)
1392 error_complete(0, 0, "name is valid but has no IP address");
1393 else if (h_errno == NO_RECOVERY)
1394 error_complete(0, 0, "unrecoverable name server error");
1395 else if (h_errno == TRY_AGAIN)
1396 error_complete(0, 0, "temporary name server error");
1398 error_complete(0, 0, "unknown DNS error %d", h_errno);
1400 error_complete(0, errno, "local error");
1407 if (ctl->server.preauthenticate == A_KERBEROS_V4)
1409 ok = kerberos_auth(sock, ctl->server.truename);
1412 set_timeout(ctl->server.timeout);
1414 #endif /* KERBEROS_V4 */
1416 /* accept greeting message from mail server */
1417 ok = (protocol->parse_response)(sock, buf);
1420 set_timeout(ctl->server.timeout);
1423 * Try to parse the host's actual name out of the greeting
1424 * message. We do this so that the progress messages will
1425 * make sense even if the connection is indirected through
1426 * ssh. *Do* use this for hacking reply headers, but *don't*
1427 * use it for error logging, as the names in the log should
1428 * correlate directly back to rc file entries.
1430 * This assumes that the first space-delimited token found
1431 * that contains at least two dots (with the characters on
1432 * each side of the dot alphanumeric to exclude version
1433 * numbers) is the hostname. The hostname candidate may not
1434 * contain @ -- if it does it's probably a mailserver
1435 * maintainer's name. If no such token is found, fall back on
1436 * the .fetchmailrc id.
1439 sp = (char *)NULL; /* sacrifice to -Wall */
1440 for (cp = buf; *cp; cp++)
1444 case 0: /* skip to end of current token */
1449 case 1: /* look for blank-delimited token */
1457 case 2: /* look for first dot */
1460 else if (*cp == ' ')
1462 else if (*cp == '.' && isalpha(cp[1]) && isalpha(cp[-1]))
1466 case 3: /* look for second dot */
1469 else if (*cp == ' ')
1471 else if (*cp == '.' && isalpha(cp[1]) && isalpha(cp[-1]))
1475 case 4: /* look for trailing space */
1478 else if (*cp == ' ')
1489 char *tp = realname;
1496 strcpy(realname, ctl->server.pollname);
1498 /* try to get authorized to fetch mail */
1499 if (protocol->getauth)
1501 shroud = ctl->password;
1502 ok = (protocol->getauth)(sock, ctl, buf);
1503 shroud = (char *)NULL;
1506 if (ok == PS_LOCKBUSY)
1507 error(0, -1, "Lock-busy error on %s@%s",
1514 error(0, -1, "Authorization failure on %s@%s",
1520 set_timeout(ctl->server.timeout);
1523 ctl->errcount = fetches = 0;
1525 /* now iterate over each folder selected */
1526 for (idp = ctl->mailboxes; idp; idp = idp->next)
1528 if (outlevel >= O_VERBOSE)
1530 error(0, 0, "selecting folder %s");
1532 error(0, 0, "selecting default folder");
1534 /* compute number of messages and number of new messages waiting */
1535 ok = (protocol->getrange)(sock, ctl, idp->id, &count, &new);
1538 set_timeout(ctl->server.timeout);
1540 /* show user how many messages we downloaded */
1542 (void) sprintf(buf, "%s@%s:%s",
1543 ctl->remotename, realname, idp->id);
1545 (void) sprintf(buf, "%s@%s", ctl->remotename, realname);
1546 if (outlevel > O_SILENT)
1547 if (count == -1) /* only used for ETRN */
1548 error(0, 0, "Polling %s", realname);
1549 else if (count == 0)
1551 /* these are pointless in normal daemon mode */
1552 if (poll_interval == 0 || outlevel == O_VERBOSE )
1553 error(0, 0, "No mail at %s", buf);
1557 if (new != -1 && (count - new) > 0)
1558 error(0, 0, "%d message%s (%d seen) at %s.",
1559 count, count > 1 ? "s" : "", count-new, buf);
1561 error(0, 0, "%d message%s at %s.",
1562 count, count > 1 ? "s" : "", buf);
1567 if (new == -1 || ctl->fetchall)
1569 ok = ((new > 0) ? PS_SUCCESS : PS_NOMAIL);
1574 flag force_retrieval;
1577 * What forces this code is that in POP3 and IMAP2BIS you can't
1578 * fetch a message without having it marked `seen'. In IMAP4,
1579 * on the other hand, you can (peek_capable is set to convey
1582 * The result of being unable to peek is that if there's
1583 * any kind of transient error (DNS lookup failure, or
1584 * sendmail refusing delivery due to process-table limits)
1585 * the message will be marked "seen" on the server without
1586 * having been delivered. This is not a big problem if
1587 * fetchmail is running in foreground, because the user
1588 * will see a "skipped" message when it next runs and get
1591 * But in daemon mode this leads to the message being silently
1592 * ignored forever. This is not acceptable.
1594 * We compensate for this by checking the error count from the
1595 * previous pass and forcing all messages to be considered new
1598 force_retrieval = !peek_capable && (ctl->errcount > 0);
1601 * We need the size of each method before it's loaded in
1602 * order to pass via the ESMTP SIZE option. If the protocol
1603 * has a getsizes method, we presume this means it doesn't
1604 * get reliable sizes from message fetch responses.
1606 if (proto->getsizes)
1608 msgsizes = (int *)alloca(sizeof(int) * count);
1610 ok = (proto->getsizes)(sock, count, msgsizes);
1613 set_timeout(ctl->server.timeout);
1616 /* read, forward, and delete messages */
1617 for (num = 1; num <= count; num++)
1619 flag toolarge = (ctl->limit > 0)
1620 && msgsizes && (msgsizes[num-1] > ctl->limit);
1621 flag fetch_it = !toolarge
1622 && (ctl->fetchall || force_retrieval || !(protocol->is_old && (protocol->is_old)(sock,ctl,num)));
1623 flag suppress_delete = FALSE;
1624 flag suppress_forward = FALSE;
1625 flag retained = FALSE;
1628 * This check copes with Post Office/NT's annoying habit
1629 * of randomly prepending bogus LIST items of length -1.
1630 * Patrick Audley <paudley@pobox.com> tells us:
1631 * LIST shows a size of -1, RETR and TOP return
1632 * "-ERR System error - couldn't open message", and DELE
1633 * succeeds but doesn't actually delete the message.
1635 if (msgsizes && msgsizes[num-1] == -1)
1637 if (outlevel >= O_VERBOSE)
1639 "Skipping message %d, length -1",
1644 /* we may want to reject this message if it's old */
1647 if (outlevel > O_SILENT)
1649 error_build("skipping message %d", num);
1651 error_build(" (oversized, %d bytes)", msgsizes[num-1]);
1656 flag wholesize = !protocol->fetch_body;
1658 /* request a message */
1659 ok = (protocol->fetch_headers)(sock, ctl, num, &len);
1662 set_timeout(ctl->server.timeout);
1664 /* -1 means we didn't see a size in the response */
1665 if (len == -1 && msgsizes)
1667 len = msgsizes[num - 1];
1671 if (outlevel > O_SILENT)
1673 error_build("reading message %d of %d",num,count);
1676 error_build(" (%d %sbytes)",
1677 len, wholesize ? "" : "header ");
1678 if (outlevel == O_VERBOSE)
1679 error_complete(0, 0, "");
1685 * Read the message headers and ship them to the
1688 ok = readheaders(sock, len, ctl, realname, num);
1689 if (ok == PS_RETAINED)
1690 suppress_forward = retained = TRUE;
1691 else if (ok == PS_TRANSIENT)
1692 suppress_delete = suppress_forward = TRUE;
1693 else if (ok == PS_REFUSED)
1694 suppress_forward = TRUE;
1697 set_timeout(ctl->server.timeout);
1700 * If we're using IMAP4 or something else that
1701 * can fetch headers separately from bodies,
1702 * it's time to request the body now. This
1703 * fetch may be skipped if we got an anti-spam
1704 * or other PS_REFUSED error response during
1707 if (protocol->fetch_body)
1709 if (outlevel == O_VERBOSE)
1710 fputc('\n', stderr);
1712 if ((ok = (protocol->trail)(sock, ctl, num)))
1714 set_timeout(ctl->server.timeout);
1716 if (!suppress_forward)
1718 if ((ok=(protocol->fetch_body)(sock,ctl,num,&len)))
1720 if (outlevel > O_SILENT && !wholesize)
1721 error_build(" (%d body bytes) ", len);
1722 set_timeout(ctl->server.timeout);
1726 /* process the body now */
1733 if (ok == PS_TRANSIENT)
1734 suppress_delete = suppress_forward = TRUE;
1737 set_timeout(ctl->server.timeout);
1739 /* tell server we got it OK and resynchronize */
1740 if (protocol->trail)
1742 if (outlevel == O_VERBOSE)
1743 fputc('\n', stderr);
1745 ok = (protocol->trail)(sock, ctl, num);
1748 set_timeout(ctl->server.timeout);
1753 * Check to see if the numbers matched?
1755 * Yes, some servers foo this up horribly.
1756 * All IMAP servers seem to get it right, and
1757 * so does Eudora QPOP at least in 2.xx
1760 * Microsoft Exchange gets it completely
1761 * wrong, reporting compressed rather than
1762 * actual sizes (so the actual length of
1763 * message is longer than the reported size).
1764 * Another fine example of Microsoft brain death!
1766 * Some older POP servers, like the old UCB
1767 * POP server and the pre-QPOP QUALCOMM
1768 * versions, report a longer size in the LIST
1769 * response than actually gets shipped up.
1770 * It's unclear what is going on here, as the
1771 * QUALCOMM server (at least) seems to be
1772 * reporting the on-disk size correctly.
1774 if (msgsizes && msglen != msgsizes[num-1])
1776 if (outlevel >= O_VERBOSE)
1778 "message %d was not the expected length (%d != %d)",
1779 num, msglen, msgsizes[num-1]);
1782 /* end-of-message processing starts here */
1788 /* close the delivery pipe, we'll reopen before next message */
1789 rc = pclose(sinkfp);
1790 signal(SIGCHLD, sigchld);
1793 error(0, -1, "MDA exited abnormally or returned nonzero status");
1797 else if (!suppress_forward)
1799 /* write message terminator */
1800 if (SMTP_eom(ctl->smtp_socket) != SM_OK)
1802 error(0, -1, "SMTP listener refused delivery");
1804 suppress_delete = TRUE;
1812 * At this point in flow of control, either we've bombed
1813 * on a protocol error or had delivery refused by the SMTP
1814 * server (unlikely -- I've never seen it) or we've seen
1815 * `accepted for delivery' and the message is shipped.
1816 * It's safe to mark the message seen and delete it on the
1820 /* maybe we delete this message now? */
1823 if (outlevel > O_SILENT)
1824 error_complete(0, 0, " retained");
1826 else if (protocol->delete
1828 && (fetch_it ? !ctl->keep : ctl->flush))
1831 if (outlevel > O_SILENT)
1832 error_complete(0, 0, " flushed");
1833 ok = (protocol->delete)(sock, ctl, num);
1836 set_timeout(ctl->server.timeout);
1837 delete_str(&ctl->newsaved, num);
1839 else if (outlevel > O_SILENT)
1840 error_complete(0, 0, " not flushed");
1842 /* perhaps this as many as we're ready to handle */
1843 if (ctl->fetchlimit > 0 && ctl->fetchlimit <= fetches)
1850 set_timeout(ctl->server.timeout);
1851 ok = (protocol->logout_cmd)(sock, ctl);
1853 ok = (fetches > 0) ? PS_SUCCESS : PS_NOMAIL;
1859 set_timeout(ctl->server.timeout);
1860 if (ok != 0 && ok != PS_SOCKET)
1861 (protocol->logout_cmd)(sock, ctl);
1866 msg = (char *)NULL; /* sacrifice to -Wall */
1873 msg = "authorization";
1876 msg = "missing or bad RFC822 header";
1882 msg = "client/server synchronization";
1885 msg = "client/server protocol";
1888 msg = "lock busy on server";
1891 msg = "SMTP transaction";
1897 error(0, 0, "undefined");
1900 if (ok==PS_SOCKET || ok==PS_AUTHFAIL || ok==PS_SYNTAX
1901 || ok==PS_IOERR || ok==PS_ERROR || ok==PS_PROTOCOL
1902 || ok==PS_LOCKBUSY || ok==PS_SMTP)
1903 error(0,-1, "%s error while fetching from %s", msg, ctl->server.pollname);
1906 /* execute post-initialization command, if any */
1907 if (ctl->postconnect && (ok = system(ctl->postconnect)))
1911 sprintf(buf, "post-connection command failed with status %d", ok);
1913 if (ok == PS_SUCCESS)
1917 signal(SIGALRM, sigsave);
1921 #if defined(HAVE_STDARG_H)
1922 void gen_send(int sock, char *fmt, ... )
1923 /* assemble command in printf(3) style and send to the server */
1925 void gen_send(sock, fmt, va_alist)
1926 /* assemble command in printf(3) style and send to the server */
1927 int sock; /* socket to which server is connected */
1928 const char *fmt; /* printf-style format */
1932 char buf [POPBUFSIZE+1];
1935 if (protocol->tagged)
1936 (void) sprintf(buf, "%s ", GENSYM);
1940 #if defined(HAVE_STDARG_H)
1945 #ifdef HAVE_VSNPRINTF
1946 vsnprintf(buf + strlen(buf), sizeof(buf), fmt, ap);
1948 vsprintf(buf + strlen(buf), fmt, ap);
1952 strcat(buf, "\r\n");
1953 SockWrite(sock, buf, strlen(buf));
1955 if (outlevel == O_VERBOSE)
1959 if (shroud && shroud[0] && (cp = strstr(buf, shroud)))
1963 sp = cp + strlen(shroud);
1969 buf[strlen(buf)-2] = '\0';
1970 error(0, 0, "%s> %s", protocol->name, buf);
1974 int gen_recv(sock, buf, size)
1975 /* get one line of input from the server */
1976 int sock; /* socket to which server is connected */
1977 char *buf; /* buffer to receive input */
1978 int size; /* length of buffer */
1980 if (SockRead(sock, buf, size) == -1)
1984 if (buf[strlen(buf)-1] == '\n')
1985 buf[strlen(buf)-1] = '\0';
1986 if (buf[strlen(buf)-1] == '\r')
1987 buf[strlen(buf)-1] = '\r';
1988 if (outlevel == O_VERBOSE)
1989 error(0, 0, "%s< %s", protocol->name, buf);
1994 #if defined(HAVE_STDARG_H)
1995 int gen_transact(int sock, char *fmt, ... )
1996 /* assemble command in printf(3) style, send to server, accept a response */
1998 int gen_transact(int sock, fmt, va_alist)
1999 /* assemble command in printf(3) style, send to server, accept a response */
2000 int sock; /* socket to which server is connected */
2001 const char *fmt; /* printf-style format */
2006 char buf [POPBUFSIZE+1];
2009 if (protocol->tagged)
2010 (void) sprintf(buf, "%s ", GENSYM);
2014 #if defined(HAVE_STDARG_H)
2019 #ifdef HAVE_VSNPRINTF
2020 vsnprintf(buf + strlen(buf), sizeof(buf), fmt, ap);
2022 vsprintf(buf + strlen(buf), fmt, ap);
2026 strcat(buf, "\r\n");
2027 SockWrite(sock, buf, strlen(buf));
2029 if (outlevel == O_VERBOSE)
2033 if (shroud && shroud[0] && (cp = strstr(buf, shroud)))
2037 sp = cp + strlen(shroud);
2043 buf[strlen(buf)-1] = '\0';
2044 error(0, 0, "%s> %s", protocol->name, buf);
2047 /* we presume this does its own response echoing */
2048 ok = (protocol->parse_response)(sock, buf);
2049 set_timeout(mytimeout);
2054 /* driver.c ends here */