#include <stdio.h>
#include <setjmp.h>
#include <errno.h>
-#include <ctype.h>
#include <string.h>
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif /* HAVE_MEMORY_H */
#if defined(STDC_HEADERS)
#include <stdlib.h>
+#include <limits.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
-#if defined(HAVE_STDARG_H)
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
#if defined(HAVE_SYS_ITIMER_H)
#include <sys/itimer.h>
#endif
-#include <sys/time.h>
#include <signal.h>
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
#ifdef HAVE_NET_SOCKET_H
#include <net/socket.h>
#endif
-
-#ifdef HAVE_RES_SEARCH
#include <netdb.h>
-#include "mx.h"
-#endif /* HAVE_RES_SEARCH */
-
-#ifdef KERBEROS_V4
-#ifdef KERBEROS_V5
-#include <kerberosIV/des.h>
-#include <kerberosIV/krb.h>
-#else
-#if defined (__bsdi__)
-#include <des.h> /* order of includes matters */
-#include <krb.h>
-#define krb_get_err_text(e) (krb_err_txt[e])
-#else
-#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__)
-#define krb_get_err_text(e) (krb_err_txt[e])
-#include <krb.h>
-#include <des.h>
-#else
-#include <krb.h>
-#include <des.h>
-#endif /* ! defined (__FreeBSD__) */
-#endif /* ! defined (__bsdi__) */
-#endif /* KERBEROS_V5 */
-#include <netinet/in.h>
-#include <netdb.h>
-#endif /* KERBEROS_V4 */
-#ifdef KERBEROS_V5
-#include <krb5.h>
-#include <com_err.h>
-#endif /* KERBEROS_V5 */
-#include "i18n.h"
-
-#include "socket.h"
-#include "fetchmail.h"
-#include "tunable.h"
-
-/* throw types for runtime errors */
-#define THROW_TIMEOUT 1 /* server timed out */
-#define THROW_SIGPIPE 2 /* SIGPIPE on stream socket */
-
-#ifndef strstr /* glibc-2.1 declares this as a macro */
-extern char *strstr(); /* needed on sysV68 R3V7.1. */
-#endif /* strstr */
-
-int batchcount; /* count of messages sent in current batch */
-flag peek_capable; /* can we peek for better error recovery? */
-int pass; /* how many times have we re-polled? */
-int stage; /* where are we? */
-int phase; /* where are we, for error-logging purposes? */
-int mytimeout; /* value of nonreponse timeout */
-
-static const struct method *protocol;
-static jmp_buf restart;
-
-char tag[TAGLEN];
-static int tagnum;
-#define GENSYM (sprintf(tag, "A%04d", ++tagnum % TAGMOD), tag)
-
-static char shroud[PASSWORDLEN]; /* string to shroud in debug output */
-static int timeoutcount; /* count consecutive timeouts */
-static int msglen; /* actual message length */
-
-void set_timeout(int timeleft)
-/* reset the nonresponse-timeout */
-{
-#if !defined(__EMX__) && !defined(__BEOS__)
- struct itimerval ntimeout;
-
- if (timeleft == 0)
- timeoutcount = 0;
-
- ntimeout.it_interval.tv_sec = ntimeout.it_interval.tv_usec = 0;
- ntimeout.it_value.tv_sec = timeleft;
- ntimeout.it_value.tv_usec = 0;
- setitimer(ITIMER_REAL, &ntimeout, (struct itimerval *)NULL);
+#ifdef HAVE_PKG_hesiod
+#ifdef __cplusplus
+extern "C" {
#endif
+#include <hesiod.h>
+#ifdef __cplusplus
}
+#endif
+#endif
-static void timeout_handler (int signal)
-/* handle SIGALRM signal indicating a server timeout */
-{
- timeoutcount++;
- longjmp(restart, THROW_TIMEOUT);
-}
-
-static void sigpipe_handler (int signal)
-/* handle SIGPIPE signal indicating a broken stream socket */
-{
- longjmp(restart, THROW_SIGPIPE);
-}
-
-static int accept_count, reject_count;
-
-static void map_name(const char *name, struct query *ctl, struct idlist **xmit_names)
-/* add given name to xmit_names if it matches declared localnames */
-/* name: name to map */
-/* ctl: list of permissible aliases */
-/* xmit_names: list of recipient names parsed out */
-{
- const char *lname;
- int off = 0;
-
- lname = idpair_find(&ctl->localnames, name+off);
- if (!lname && ctl->wildcard)
- lname = name+off;
-
- if (lname != (char *)NULL)
- {
- if (outlevel >= O_DEBUG)
- report(stdout, _("mapped %s to local %s\n"), name, lname);
- save_str(xmit_names, lname, XMIT_ACCEPT);
- accept_count++;
- }
-}
-
-static void find_server_names(const char *hdr,
- struct query *ctl,
- struct idlist **xmit_names)
-/* parse names out of a RFC822 header into an ID list */
-/* hdr: RFC822 header in question */
-/* ctl: list of permissible aliases */
-/* xmit_names: list of recipient names parsed out */
-{
- if (hdr == (char *)NULL)
- return;
- else
- {
- char *cp;
-
- for (cp = nxtaddr(hdr);
- cp != NULL;
- cp = nxtaddr(NULL))
- {
- char *atsign;
-
- /*
- * If the name of the user begins with a qmail virtual
- * domain prefix, ignore the prefix. Doing this here
- * means qvirtual will work either with ordinary name
- * mapping or with a localdomains option.
- */
- if (ctl->server.qvirtual)
- {
- int sl = strlen(ctl->server.qvirtual);
-
- if (!strncasecmp(cp, ctl->server.qvirtual, sl))
- cp += sl;
- }
-
- if ((atsign = strchr(cp, '@'))) {
- struct idlist *idp;
-
- /*
- * Does a trailing segment of the hostname match something
- * on the localdomains list? If so, save the whole name
- * and keep going.
- */
- for (idp = ctl->server.localdomains; idp; idp = idp->next) {
- char *rhs;
-
- rhs = atsign + (strlen(atsign) - strlen(idp->id));
- if (rhs > atsign &&
- (rhs[-1] == '.' || rhs[-1] == '@') &&
- strcasecmp(rhs, idp->id) == 0)
- {
- if (outlevel >= O_DEBUG)
- report(stdout, _("passed through %s matching %s\n"),
- cp, idp->id);
- save_str(xmit_names, cp, XMIT_ACCEPT);
- accept_count++;
- goto nomap;
- }
- }
-
- /* if we matched a local domain, idp != NULL */
- if (!idp)
- {
- /*
- * Check to see if the right-hand part is an alias
- * or MX equivalent of the mailserver. If it's
- * not, skip this name. If it is, we'll keep
- * going and try to find a mapping to a client name.
- */
- if (!is_host_alias(atsign+1, ctl))
- {
- save_str(xmit_names, cp, XMIT_REJECT);
- reject_count++;
- continue;
- }
- }
- atsign[0] = '\0';
- map_name(cp, ctl, xmit_names);
- nomap:;
- }
- }
- }
-}
-
-/*
- * Return zero on a syntactically invalid address, nz on a valid one.
- *
- * This used to be strchr(a, '.'), but it turns out that lines like this
- *
- * Received: from punt-1.mail.demon.net by mailstore for markb@ordern.com
- * id 938765929:10:27223:2; Fri, 01 Oct 99 08:18:49 GMT
- *
- * are not uncommon. So now we just check that the following token is
- * not itself an email address.
- */
-#define VALID_ADDRESS(a) !strchr(a, '@')
-
-static char *parse_received(struct query *ctl, char *bufp)
-/* try to extract real address from the Received line */
-/* If a valid Received: line is found, we return the full address in
- * a buffer which can be parsed from nxtaddr(). This is to ansure that
- * the local domain part of the address can be passed along in
- * find_server_names() if it contains one.
- * Note: We should return a dummy header containing the address
- * which makes nxtaddr() behave correctly.
- */
-{
- char *base, *ok = (char *)NULL;
- static char rbuf[HOSTLEN + USERNAMELEN + 4];
-
- /*
- * Try to extract the real envelope addressee. We look here
- * specifically for the mailserver's Received line.
- * Note: this will only work for sendmail, or an MTA that
- * shares sendmail's convention for embedding the envelope
- * address in the Received line. Sendmail itself only
- * does this when the mail has a single recipient.
- */
- if (outlevel >= O_DEBUG)
- report(stdout, _("analyzing Received line:\n%s"), bufp);
-
- /* search for whitepace-surrounded "by" followed by valid address */
- for (base = bufp; ; base = ok + 2)
- {
- if (!(ok = strstr(base, "by")))
- break;
- else if (!isspace(ok[-1]) || !isspace(ok[2]))
- continue;
- else
- {
- char *sp, *tp;
-
- /* extract space-delimited token after "by" */
- for (sp = ok + 2; isspace(*sp); sp++)
- continue;
- tp = rbuf;
- for (; !isspace(*sp); sp++)
- *tp++ = *sp;
- *tp = '\0';
-
- /* look for valid address */
- if (VALID_ADDRESS(rbuf))
- break;
- else
- ok = sp - 1; /* arrange to skip this token */
- }
- }
- if (ok)
- {
- /*
- * If it's a DNS name of the mail server, look for the
- * recipient name after a following "for". Otherwise
- * punt.
- */
- if (is_host_alias(rbuf, ctl))
- {
- if (outlevel >= O_DEBUG)
- report(stdout,
- _("line accepted, %s is an alias of the mailserver\n"), rbuf);
- }
- else
- {
- if (outlevel >= O_DEBUG)
- report(stdout,
- _("line rejected, %s is not an alias of the mailserver\n"),
- rbuf);
- return(NULL);
- }
-
- /* search for whitepace-surrounded "for" followed by xxxx@yyyy */
- for (base = ok + 4 + strlen(rbuf); ; base = ok + 2)
- {
- if (!(ok = strstr(base, "for")))
- break;
- else if (!isspace(ok[-1]) || !isspace(ok[3]))
- continue;
- else
- {
- char *sp, *tp;
-
- /* extract space-delimited token after "for" */
- for (sp = ok + 3; isspace(*sp); sp++)
- continue;
- tp = rbuf;
- for (; !isspace(*sp); sp++)
- *tp++ = *sp;
- *tp = '\0';
-
- if (strchr(rbuf, '@'))
- break;
- else
- ok = sp - 1; /* arrange to skip this token */
- }
- }
- if (ok)
- {
- flag want_gt = FALSE;
- char *sp, *tp;
-
- /* char after "for" could be space or a continuation newline */
- for (sp = ok + 4; isspace(*sp); sp++)
- continue;
- tp = rbuf;
- *tp++ = ':'; /* Here is the hack. This is to be friends */
- *tp++ = ' '; /* with nxtaddr()... */
- if (*sp == '<')
- {
- want_gt = TRUE;
- sp++;
- }
- while (*sp == '@') /* skip routes */
- while (*sp && *sp++ != ':')
- continue;
- while (*sp
- && (want_gt ? (*sp != '>') : !isspace(*sp))
- && *sp != ';')
- if (!isspace(*sp))
- *tp++ = *sp++;
- else
- {
- /* uh oh -- whitespace here can't be right! */
- ok = (char *)NULL;
- break;
- }
- *tp++ = '\n';
- *tp = '\0';
- if (strlen(rbuf) <= 3) /* apparently nothing has been found */
- ok = NULL;
- } else
- ok = (char *)NULL;
- }
-
- if (!ok)
- {
- if (outlevel >= O_DEBUG)
- report(stdout, _("no Received address found\n"));
- return(NULL);
- }
- else
- {
- if (outlevel >= O_DEBUG) {
- char *lf = rbuf + strlen(rbuf)-1;
- *lf = '\0';
- if (outlevel >= O_DEBUG)
- report(stdout, _("found Received address `%s'\n"), rbuf+2);
- *lf = '\n';
- }
- return(rbuf);
- }
-}
-
-/* shared by readheaders and readbody */
-static int sizeticker;
-static struct msgblk msgblk;
-
-#define EMPTYLINE(s) ((s)[0] == '\r' && (s)[1] == '\n' && (s)[2] == '\0')
-
-static int readheaders(int sock,
- long fetchlen,
- long reallen,
- struct query *ctl,
- int num)
-/* read message headers and ship to SMTP or MDA */
-/* sock: to which the server is connected */
-/* fetchlen: length of message according to fetch response */
-/* reallen: length of message according to getsizes */
-/* ctl: query control record */
-/* num: index of message */
-{
- struct addrblk
- {
- int offset;
- struct addrblk *next;
- };
- struct addrblk *to_addrchain = NULL;
- struct addrblk **to_chainptr = &to_addrchain;
- struct addrblk *resent_to_addrchain = NULL;
- struct addrblk **resent_to_chainptr = &resent_to_addrchain;
-
- char buf[MSGBUFSIZE+1];
- int from_offs, reply_to_offs, resent_from_offs;
- int app_from_offs, sender_offs, resent_sender_offs;
- int env_offs;
- char *received_for, *rcv, *cp, *delivered_to;
- int n, linelen, oldlen, ch, remaining, skipcount;
- struct idlist *idp;
- flag no_local_matches = FALSE;
- flag headers_ok, has_nuls;
- int olderrs, good_addresses, bad_addresses;
-
- sizeticker = 0;
- has_nuls = headers_ok = FALSE;
- msgblk.return_path[0] = '\0';
- olderrs = ctl->errcount;
-
- /* read message headers */
- msgblk.reallen = reallen;
-
- /*
- * We used to free the header block unconditionally at the end of
- * readheaders, but it turns out that if close_sink() hits an error
- * condition the code for sending bouncemail will actually look
- * at the freed storage and coredump...
- */
- if (msgblk.headers)
- free(msgblk.headers);
-
- msgblk.headers = received_for = delivered_to = NULL;
- from_offs = reply_to_offs = resent_from_offs = app_from_offs =
- sender_offs = resent_sender_offs = env_offs = -1;
- oldlen = 0;
- msglen = 0;
- skipcount = 0;
- ctl->mimemsg = 0;
-
- for (remaining = fetchlen; remaining > 0 || protocol->delimited; remaining -= linelen)
- {
- char *line;
-
- line = xmalloc(sizeof(buf));
- linelen = 0;
- line[0] = '\0';
- do {
- set_timeout(mytimeout);
- if ((n = SockRead(sock, buf, sizeof(buf)-1)) == -1) {
- set_timeout(0);
- free(line);
- free(msgblk.headers);
- msgblk.headers = NULL;
- return(PS_SOCKET);
- }
- set_timeout(0);
- linelen += n;
- msglen += n;
-
- /* lines may not be properly CRLF terminated; fix this for qmail */
- if (ctl->forcecr)
- {
- cp = buf + strlen(buf) - 1;
- if (*cp == '\n' && (cp == buf || cp[-1] != '\r'))
- {
- *cp++ = '\r';
- *cp++ = '\n';
- *cp++ = '\0';
- }
- }
-
- /*
- * Decode MIME encoded headers. We MUST do this before
- * looking at the Content-Type / Content-Transfer-Encoding
- * headers (RFC 2046).
- */
- if (ctl->mimedecode)
- UnMimeHeader(buf);
-
- line = (char *) realloc(line, strlen(line) + strlen(buf) +1);
-
- strcat(line, buf);
-
- /* check for end of headers */
- if (EMPTYLINE(line))
- {
- headers_ok = TRUE;
- has_nuls = (linelen != strlen(line));
- free(line);
- goto process_headers;
- }
-
- /*
- * Check for end of message immediately. If one of your folders
- * has been mangled, the delimiter may occur directly after the
- * header.
- */
- if (protocol->delimited && line[0] == '.' && EMPTYLINE(line+1))
- {
- free(line);
- has_nuls = (linelen != strlen(line));
- goto process_headers;
- }
-
- /* check for RFC822 continuations */
- set_timeout(mytimeout);
- ch = SockPeek(sock);
- set_timeout(0);
- } while
- (ch == ' ' || ch == '\t'); /* continuation to next line? */
-
- /* write the message size dots */
- if ((outlevel > O_SILENT && outlevel < O_VERBOSE) && linelen > 0)
- {
- sizeticker += linelen;
- while (sizeticker >= SIZETICKER)
- {
- if ((!run.use_syslog && !isafile(1)) || run.showdots)
- {
- fputc('.', stdout);
- fflush(stdout);
- }
- sizeticker -= SIZETICKER;
- }
- }
-
- /* we see an ordinary (non-header, non-message-delimiter line */
- has_nuls = (linelen != strlen(line));
-
- /*
- * When mail delivered to a multidrop mailbox on the server is
- * addressed to multiple people on the client machine, there
- * will be one copy left in the box for each recipient. Thus,
- * if the mail is addressed to N people, each recipient will
- * get N copies. This is bad when N > 1.
- *
- * Foil this by suppressing all but one copy of a message with
- * a given Message-ID. The accept_count test ensures that
- * multiple pieces of email with the same Message-ID, each
- * with a *single* addressee (the N == 1 case), won't be
- * suppressed.
- *
- * Note: This implementation only catches runs of successive
- * messages with the same ID, but that should be good
- * enough. A more general implementation would have to store
- * ever-growing lists of seen message-IDs; in a long-running
- * daemon this would turn into a memory leak even if the
- * implementation were perfect.
- *
- * Don't mess with this code casually. It would be way too easy
- * to break it in a way that blackholed mail. Better to pass
- * the occasional duplicate than to do that...
- */
- if (MULTIDROP(ctl) && !strncasecmp(line, "Message-ID:", 11))
- {
- if (ctl->lastid && !strcasecmp(ctl->lastid, line))
- {
- if (accept_count > 1)
- return(PS_REFUSED);
- }
- else
- {
- if (ctl->lastid)
- free(ctl->lastid);
- ctl->lastid = strdup(line);
- }
- }
-
- /*
- * The University of Washington IMAP server (the reference
- * implementation of IMAP4 written by Mark Crispin) relies
- * on being able to keep base-UID information in a special
- * message at the head of the mailbox. This message should
- * neither be deleted nor forwarded.
- */
-#ifdef POP2_ENABLE
- /*
- * We disable this check under POP2 because there's no way to
- * prevent deletion of the message. So at least we ought to
- * forward it to the user so he or she will have some clue
- * that things have gone awry.
- */
-#if INET6_ENABLE
- if (strncmp(protocol->service, "pop2", 4))
-#else /* INET6_ENABLE */
- if (protocol->port != 109)
-#endif /* INET6_ENABLE */
-#endif /* POP2_ENABLE */
- if (num == 1 && !strncasecmp(line, "X-IMAP:", 7)) {
- free(line);
- free(msgblk.headers);
- msgblk.headers = NULL;
- return(PS_RETAINED);
- }
-
- /*
- * This code prevents fetchmail from becoming an accessory after
- * the fact to upstream sendmails with the `E' option on. It also
- * copes with certain brain-dead POP servers (like NT's) that pass
- * through Unix from_ lines.
- *
- * Either of these bugs can result in a non-RFC822 line at the
- * beginning of the headers. If fetchmail just passes it
- * through, the client listener may think the message has *no*
- * headers (since the first) line it sees doesn't look
- * RFC822-conformant) and fake up a set.
- *
- * What the user would see in this case is bogus (synthesized)
- * headers, followed by a blank line, followed by the >From,
- * followed by the real headers, followed by a blank line,
- * followed by text.
- *
- * We forestall this lossage by tossing anything that looks
- * like an escaped or passed-through From_ line in headers.
- * These aren't RFC822 so our conscience is clear...
- */
- if (!strncasecmp(line, ">From ", 6) || !strncasecmp(line, "From ", 5))
- {
- free(line);
- continue;
- }
-
- /*
- * We remove all Delivered-To: headers.
- *
- * This is to avoid false mail loops messages when delivering
- * local messages to and from a Postfix/qmail mailserver.
- *
- * Should be controlled by an option
- */
- if (ctl->dropdelivered && !strncasecmp(line, "Delivered-To:", 13)) {
- if (delivered_to) free(line);
- else delivered_to = line;
- continue;
- }
-
- /*
- * If we see a Status line, it may have been inserted by an MUA
- * on the mail host, or it may have been inserted by the server
- * program after the headers in the transaction stream. This
- * can actually hose some new-mail notifiers such as xbuffy,
- * which assumes any Status line came from a *local* MDA and
- * therefore indicates that the message has been seen.
- *
- * Some buggy POP servers (including at least the 3.3(20)
- * version of the one distributed with IMAP) insert empty
- * Status lines in the transaction stream; we'll chuck those
- * unconditionally. Nonempty ones get chucked if the user
- * turns on the dropstatus flag.
- */
- {
- char *cp;
-
- if (!strncasecmp(line, "Status:", 7))
- cp = line + 7;
- else if (!strncasecmp(line, "X-Mozilla-Status:", 17))
- cp = line + 17;
- else
- cp = NULL;
- if (cp) {
- while (*cp && isspace(*cp)) cp++;
- if (!*cp || ctl->dropstatus)
- {
- free(line);
- continue;
- }
- }
- }
-
- if (ctl->rewrite)
- line = reply_hack(line, ctl->server.truename);
-
- /*
- * OK, this is messy. If we're forwarding by SMTP, it's the
- * SMTP-receiver's job (according to RFC821, page 22, section
- * 4.1.1) to generate a Return-Path line on final delivery.
- * The trouble is, we've already got one because the
- * mailserver's SMTP thought *it* was responsible for final
- * delivery.
- *
- * Stash away the contents of Return-Path (as modified by reply_hack)
- * for use in generating MAIL FROM later on, then prevent the header
- * from being saved with the others. In effect, we strip it off here.
- *
- * If the SMTP server conforms to the standards, and fetchmail gets the
- * envelope sender from the Return-Path, the new Return-Path should be
- * exactly the same as the original one.
- *
- * We do *not* want to ignore empty Return-Path headers. These should
- * be passed through as a way of indicating that a message should
- * not trigger bounces if delivery fails. What we *do* need to do is
- * make sure we never try to rewrite such a blank Return-Path. We
- * handle this with a check for <> in the rewrite logic above.
- */
- if (!strncasecmp("Return-Path:", line, 12) && (cp = nxtaddr(line)))
- {
- strcpy(msgblk.return_path, cp);
- if (!ctl->mda) {
- free(line);
- continue;
- }
- }
-
- if (!msgblk.headers)
- {
- oldlen = strlen(line);
- msgblk.headers = xmalloc(oldlen + 1);
- (void) strcpy(msgblk.headers, line);
- free(line);
- line = msgblk.headers;
- }
- else
- {
- char *newhdrs;
- int newlen;
-
- newlen = oldlen + strlen(line);
- newhdrs = (char *) realloc(msgblk.headers, newlen + 1);
- if (newhdrs == NULL) {
- free(line);
- return(PS_IOERR);
- }
- msgblk.headers = newhdrs;
- strcpy(msgblk.headers + oldlen, line);
- free(line);
- line = msgblk.headers + oldlen;
- oldlen = newlen;
- }
-
- if (!strncasecmp("From:", line, 5))
- from_offs = (line - msgblk.headers);
- else if (!strncasecmp("Reply-To:", line, 9))
- reply_to_offs = (line - msgblk.headers);
- else if (!strncasecmp("Resent-From:", line, 12))
- resent_from_offs = (line - msgblk.headers);
- else if (!strncasecmp("Apparently-From:", line, 16))
- app_from_offs = (line - msgblk.headers);
- else if (!strncasecmp("Sender:", line, 7))
- sender_offs = (line - msgblk.headers);
- else if (!strncasecmp("Resent-Sender:", line, 14))
- resent_sender_offs = (line - msgblk.headers);
-
-#ifdef __UNUSED__
- else if (!strncasecmp("Message-Id:", line, 11))
- {
- if (ctl->server.uidl)
- {
- char id[IDLEN+1];
-
- line[IDLEN+12] = 0; /* prevent stack overflow */
- sscanf(line+12, "%s", id);
- if (!str_find( &ctl->newsaved, num))
- {
- struct idlist *new = save_str(&ctl->newsaved,id,UID_SEEN);
- new->val.status.num = num;
- }
- }
- }
-#endif /* __UNUSED__ */
-
- else if (!MULTIDROP(ctl))
- continue;
-
- else if (!strncasecmp("To:", line, 3)
- || !strncasecmp("Cc:", line, 3)
- || !strncasecmp("Bcc:", line, 4)
- || !strncasecmp("Apparently-To:", line, 14))
- {
- *to_chainptr = xmalloc(sizeof(struct addrblk));
- (*to_chainptr)->offset = (line - msgblk.headers);
- to_chainptr = &(*to_chainptr)->next;
- *to_chainptr = NULL;
- }
-
- else if (!strncasecmp("Resent-To:", line, 10)
- || !strncasecmp("Resent-Cc:", line, 10)
- || !strncasecmp("Resent-Bcc:", line, 11))
- {
- *resent_to_chainptr = xmalloc(sizeof(struct addrblk));
- (*resent_to_chainptr)->offset = (line - msgblk.headers);
- resent_to_chainptr = &(*resent_to_chainptr)->next;
- *resent_to_chainptr = NULL;
- }
-
- else if (ctl->server.envelope != STRING_DISABLED)
- {
- if (ctl->server.envelope
- && strcasecmp(ctl->server.envelope, "Received"))
- {
- if (env_offs == -1 && !strncasecmp(ctl->server.envelope,
- line,
- strlen(ctl->server.envelope)))
- {
- if (skipcount++ != ctl->server.envskip)
- continue;
- env_offs = (line - msgblk.headers);
- }
- }
- else if (!received_for && !strncasecmp("Received:", line, 9))
- {
- if (skipcount++ != ctl->server.envskip)
- continue;
- received_for = parse_received(ctl, line);
- }
- }
- }
-
- process_headers:
- /*
- * We want to detect this early in case there are so few headers that the
- * dispatch logic barfs.
- */
- if (!headers_ok)
- {
- if (outlevel > O_SILENT)
- report(stdout,
- _("message delimiter found while scanning headers\n"));
- }
-
- /*
- * Hack time. If the first line of the message was blank, with no headers
- * (this happens occasionally due to bad gatewaying software) cons up
- * a set of fake headers.
- *
- * If you modify the fake header template below, be sure you don't
- * make either From or To address @-less, otherwise the reply_hack
- * logic will do bad things.
- */
- if (msgblk.headers == (char *)NULL)
- {
-#ifdef HAVE_SNPRINTF
- snprintf(buf, sizeof(buf),
-#else
- sprintf(buf,
-#endif /* HAVE_SNPRINTF */
- "From: FETCHMAIL-DAEMON\r\nTo: %s@%s\r\nSubject: Headerless mail from %s's mailbox on %s\r\n",
- user, fetchmailhost, ctl->remotename, ctl->server.truename);
- msgblk.headers = xstrdup(buf);
- }
-
- /*
- * We can now process message headers before reading the text.
- * In fact we have to, as this will tell us where to forward to.
- */
-
- /* Check for MIME headers indicating possible 8-bit data */
- ctl->mimemsg = MimeBodyType(msgblk.headers, ctl->mimedecode);
-
-#ifdef SDPS_ENABLE
- if (ctl->server.sdps && sdps_envfrom)
- {
- /* We have the real envelope return-path, stored out of band by
- * SDPS - that's more accurate than any header is going to be.
- */
- strcpy(msgblk.return_path, sdps_envfrom);
- free(sdps_envfrom);
- } else
-#endif /* SDPS_ENABLE */
- /*
- * If there is a Return-Path address on the message, this was
- * almost certainly the MAIL FROM address given the originating
- * sendmail. This is the best thing to use for logging the
- * message origin (it sets up the right behavior for bounces and
- * mailing lists). Otherwise, fall down to the next available
- * envelope address (which is the most probable real sender).
- * *** The order is important! ***
- * This is especially useful when receiving mailing list
- * messages in multidrop mode. if a local address doesn't
- * exist, the bounce message won't be returned blindly to the
- * author or to the list itself but rather to the list manager
- * (ex: specified by "Sender:") which is much less annoying. This
- * is true for most mailing list packages.
- */
- if( !msgblk.return_path[0] ){
- char *ap = NULL;
- if (resent_sender_offs >= 0 && (ap = nxtaddr(msgblk.headers + resent_sender_offs)));
- else if (sender_offs >= 0 && (ap = nxtaddr(msgblk.headers + sender_offs)));
- else if (resent_from_offs >= 0 && (ap = nxtaddr(msgblk.headers + resent_from_offs)));
- else if (from_offs >= 0 && (ap = nxtaddr(msgblk.headers + from_offs)));
- else if (reply_to_offs >= 0 && (ap = nxtaddr(msgblk.headers + reply_to_offs)));
- else if (app_from_offs >= 0 && (ap = nxtaddr(msgblk.headers + app_from_offs)));
- if (ap) strcpy( msgblk.return_path, ap );
- }
-
- /* cons up a list of local recipients */
- msgblk.recipients = (struct idlist *)NULL;
- accept_count = reject_count = 0;
- /* is this a multidrop box? */
- if (MULTIDROP(ctl))
- {
-#ifdef SDPS_ENABLE
- if (ctl->server.sdps && sdps_envto)
- {
- /* We have the real envelope recipient, stored out of band by
- * SDPS - that's more accurate than any header is going to be.
- */
- find_server_names(sdps_envto, ctl, &msgblk.recipients);
- free(sdps_envto);
- } else
-#endif /* SDPS_ENABLE */
- if (env_offs > -1) /* We have the actual envelope addressee */
- find_server_names(msgblk.headers + env_offs, ctl, &msgblk.recipients);
- else if (delivered_to && ctl->server.envelope != STRING_DISABLED &&
- ctl->server.envelope && !strcasecmp(ctl->server.envelope, "Delivered-To"))
- {
- find_server_names(delivered_to, ctl, &msgblk.recipients);
- free(delivered_to);
- }
- else if (received_for)
- /*
- * We have the Received for addressee.
- * It has to be a mailserver address, or we
- * wouldn't have got here.
- * We use find_server_names() to let local
- * hostnames go through.
- */
- find_server_names(received_for, ctl, &msgblk.recipients);
- else
- {
- /*
- * We haven't extracted the envelope address.
- * So check all the "Resent-To" header addresses if
- * they exist. If and only if they don't, consider
- * the "To" addresses.
- */
- register struct addrblk *nextptr;
- if (resent_to_addrchain) {
- /* delete the "To" chain and substitute it
- * with the "Resent-To" list
- */
- while (to_addrchain) {
- nextptr = to_addrchain->next;
- free(to_addrchain);
- to_addrchain = nextptr;
- }
- to_addrchain = resent_to_addrchain;
- resent_to_addrchain = NULL;
- }
- /* now look for remaining adresses */
- while (to_addrchain) {
- find_server_names(msgblk.headers+to_addrchain->offset, ctl, &msgblk.recipients);
- nextptr = to_addrchain->next;
- free(to_addrchain);
- to_addrchain = nextptr;
- }
- }
- if (!accept_count)
- {
- no_local_matches = TRUE;
- save_str(&msgblk.recipients, run.postmaster, XMIT_ACCEPT);
- if (outlevel >= O_DEBUG)
- report(stdout,
- _("no local matches, forwarding to %s\n"),
- run.postmaster);
- }
- }
- else /* it's a single-drop box, use first localname */
- save_str(&msgblk.recipients, ctl->localnames->id, XMIT_ACCEPT);
-
-
- /*
- * Time to either address the message or decide we can't deliver it yet.
- */
- if (ctl->errcount > olderrs) /* there were DNS errors above */
- {
- if (outlevel >= O_DEBUG)
- report(stdout,
- _("forwarding and deletion suppressed due to DNS errors\n"));
- free(msgblk.headers);
- msgblk.headers = NULL;
- free_str_list(&msgblk.recipients);
- return(PS_TRANSIENT);
- }
- else
- {
- /* set up stuffline() so we can deliver the message body through it */
- if ((n = open_sink(ctl, &msgblk,
- &good_addresses, &bad_addresses)) != PS_SUCCESS)
- {
- free(msgblk.headers);
- msgblk.headers = NULL;
- free_str_list(&msgblk.recipients);
- return(n);
- }
- }
-
- n = 0;
- /*
- * Some server/sendmail combinations cause problems when our
- * synthetic Received line is before the From header. Cope
- * with this...
- */
- if ((rcv = strstr(msgblk.headers, "Received:")) == (char *)NULL)
- rcv = msgblk.headers;
- /* handle ">Received:" lines too */
- while (rcv > msgblk.headers && rcv[-1] != '\n')
- rcv--;
- if (rcv > msgblk.headers)
- {
- char c = *rcv;
-
- *rcv = '\0';
- n = stuffline(ctl, msgblk.headers);
- *rcv = c;
- }
- if (!run.invisible && n != -1)
- {
- /* utter any per-message Received information we need here */
- if (ctl->server.trueaddr) {
- sprintf(buf, "Received: from %s [%u.%u.%u.%u]\r\n",
- ctl->server.truename,
- (unsigned char)ctl->server.trueaddr[0],
- (unsigned char)ctl->server.trueaddr[1],
- (unsigned char)ctl->server.trueaddr[2],
- (unsigned char)ctl->server.trueaddr[3]);
- } else {
- sprintf(buf, "Received: from %s\r\n", ctl->server.truename);
- }
- n = stuffline(ctl, buf);
- if (n != -1)
- {
- /*
- * This header is technically invalid under RFC822.
- * POP3, IMAP, etc. are not legal mail-parameter values.
- *
- * We used to include ctl->remotename in this log line,
- * but this can be secure information that would be bad
- * to reveal.
- */
- sprintf(buf, "\tby %s with %s (fetchmail-%s)\r\n",
- fetchmailhost,
- protocol->name,
- VERSION);
- n = stuffline(ctl, buf);
- if (n != -1)
- {
- buf[0] = '\t';
- if (good_addresses == 0)
- {
- sprintf(buf+1,
- "for %s@%s (by default); ",
- user, ctl->destaddr);
- }
- else if (good_addresses == 1)
- {
- for (idp = msgblk.recipients; idp; idp = idp->next)
- if (idp->val.status.mark == XMIT_ACCEPT)
- break; /* only report first address */
- if (strchr(idp->id, '@'))
- sprintf(buf+1, "for %s", idp->id);
- else
- /*
- * This could be a bit misleading, as destaddr is
- * the forwarding host rather than the actual
- * destination. Most of the time they coincide.
- */
- sprintf(buf+1, "for %s@%s", idp->id, ctl->destaddr);
- sprintf(buf+strlen(buf), " (%s); ",
- MULTIDROP(ctl) ? "multi-drop" : "single-drop");
- }
- else
- buf[1] = '\0';
-
- strcat(buf, rfc822timestamp());
- strcat(buf, "\r\n");
- n = stuffline(ctl, buf);
- }
- }
- }
-
- if (n != -1)
- n = stuffline(ctl, rcv); /* ship out rest of msgblk.headers */
-
- if (n == -1)
- {
- report(stdout, _("writing RFC822 msgblk.headers\n"));
- release_sink(ctl);
- free(msgblk.headers);
- msgblk.headers = NULL;
- free_str_list(&msgblk.recipients);
- return(PS_IOERR);
- }
- else if ((run.poll_interval == 0 || nodetach) && outlevel >= O_VERBOSE && !isafile(2))
- fputs("#", stderr);
-
- /* write error notifications */
- if (no_local_matches || has_nuls || bad_addresses)
- {
- int errlen = 0;
- char errhd[USERNAMELEN + POPBUFSIZE], *errmsg;
-
- errmsg = errhd;
- (void) strcpy(errhd, "X-Fetchmail-Warning: ");
- if (no_local_matches)
- {
- if (reject_count != 1)
- strcat(errhd, _("no recipient addresses matched declared local names"));
- else
- {
- for (idp = msgblk.recipients; idp; idp = idp->next)
- if (idp->val.status.mark == XMIT_REJECT)
- break;
- sprintf(errhd+strlen(errhd), _("recipient address %s didn't match any local name"), idp->id);
- }
- }
-
- if (has_nuls)
- {
- if (errhd[sizeof("X-Fetchmail-Warning: ")])
- strcat(errhd, "; ");
- strcat(errhd, _("message has embedded NULs"));
- }
+#include <langinfo.h>
- if (bad_addresses)
- {
- if (errhd[sizeof("X-Fetchmail-Warning: ")])
- strcat(errhd, "; ");
- strcat(errhd, _("SMTP listener rejected local recipient addresses: "));
- errlen = strlen(errhd);
- for (idp = msgblk.recipients; idp; idp = idp->next)
- if (idp->val.status.mark == XMIT_RCPTBAD)
- errlen += strlen(idp->id) + 2;
-
- xalloca(errmsg, char *, errlen+3);
- (void) strcpy(errmsg, errhd);
- for (idp = msgblk.recipients; idp; idp = idp->next)
- if (idp->val.status.mark == XMIT_RCPTBAD)
- {
- strcat(errmsg, idp->id);
- if (idp->next)
- strcat(errmsg, ", ");
- }
+#include "kerberos.h"
+#ifdef KERBEROS_V4
+#include <netinet/in.h>
+#endif /* KERBEROS_V4 */
- }
+#include "i18n.h"
+#include "socket.h"
- strcat(errmsg, "\r\n");
+#include "fetchmail.h"
+#include "getaddrinfo.h"
+#include "tunable.h"
- /* ship out the error line */
- stuffline(ctl, errmsg);
- }
+#include "sdump.h"
- /* issue the delimiter line */
- cp = buf;
- *cp++ = '\r';
- *cp++ = '\n';
- *cp++ = '\0';
- stuffline(ctl, buf);
+/* throw types for runtime errors */
+#define THROW_TIMEOUT 1 /* server timed out */
-/* free(msgblk.headers); */
- free_str_list(&msgblk.recipients);
- return(headers_ok ? PS_SUCCESS : PS_TRUNCATED);
-}
+/* magic values for the message length array */
+#define MSGLEN_UNKNOWN 0 /* length unknown (0 is impossible) */
+#define MSGLEN_INVALID -1 /* length passed back is invalid */
+#define MSGLEN_TOOLARGE -2 /* message is too large */
+#define MSGLEN_OLD -3 /* message is old */
-static int readbody(int sock, struct query *ctl, flag forward, int len)
-/* read and dispose of a message body presented on sock */
-/* ctl: query control record */
-/* sock: to which the server is connected */
-/* len: length of message */
-/* forward: TRUE to forward */
-{
- int linelen;
- unsigned char buf[MSGBUFSIZE+4];
- unsigned char *inbufp = buf;
- flag issoftline = FALSE;
+int pass; /* how many times have we re-polled? */
+int stage; /* where are we? */
+int phase; /* where are we, for error-logging purposes? */
+int batchcount; /* count of messages sent in current batch */
+flag peek_capable; /* can we peek for better error recovery? */
+int mailserver_socket_temp = -1; /* socket to free if connect timeout */
- /*
- * Pass through the text lines in the body.
- *
- * Yes, this wants to be ||, not &&. The problem is that in the most
- * important delimited protocol, POP3, the length is not reliable.
- * As usual, the problem is Microsoft brain damage; see FAQ item S2.
- * So, for delimited protocols we need to ignore the length here and
- * instead drop out of the loop with a break statement when we see
- * the message delimiter.
- */
- while (protocol->delimited || len > 0)
- {
- set_timeout(mytimeout);
- if ((linelen = SockRead(sock, inbufp, sizeof(buf)-4-(inbufp-buf)))==-1)
- {
- set_timeout(0);
- release_sink(ctl);
- return(PS_SOCKET);
- }
- set_timeout(0);
+struct addrinfo *ai0, *ai1; /* clean these up after signal */
- /* write the message size dots */
- if (linelen > 0)
- {
- sizeticker += linelen;
- while (sizeticker >= SIZETICKER)
- {
- if (outlevel > O_SILENT && (((run.poll_interval == 0 || nodetach) && !isafile(1)) || run.showdots))
- {
- fputc('.', stdout);
- fflush(stdout);
- }
- sizeticker -= SIZETICKER;
- }
- }
- len -= linelen;
+static volatile int timeoutcount = 0; /* count consecutive timeouts */
+static volatile int idletimeout = 0; /* timeout occured in idle stage? */
- /* check for end of message */
- if (protocol->delimited && *inbufp == '.')
- {
- if (inbufp[1] == '\r' && inbufp[2] == '\n' && inbufp[3] == '\0')
- break;
- else if (inbufp[1] == '\n' && inbufp[2] == '\0')
- break;
- else
- msglen--; /* subtract the size of the dot escape */
- }
+static sigjmp_buf restart;
- msglen += linelen;
+int is_idletimeout(void)
+/* last timeout occured in idle stage? */
+{
+ return idletimeout;
+}
- if (ctl->mimedecode && (ctl->mimemsg & MSG_NEEDS_DECODE)) {
- issoftline = UnMimeBodyline(&inbufp, protocol->delimited, issoftline);
- if (issoftline && (sizeof(buf)-1-(inbufp-buf) < 200))
- {
- /*
- * Soft linebreak, but less than 200 bytes left in
- * input buffer. Rather than doing a buffer overrun,
- * ignore the soft linebreak, NL-terminate data and
- * deliver what we have now.
- * (Who writes lines longer than 2K anyway?)
- */
- *inbufp = '\n'; *(inbufp+1) = '\0';
- issoftline = 0;
- }
- }
+void resetidletimeout(void)
+{
+ idletimeout = 0;
+}
- /* ship out the text line */
- if (forward && (!issoftline))
- {
- int n;
- inbufp = buf;
+void set_timeout(int timeleft)
+/* reset the nonresponse-timeout */
+{
+#if !defined(__EMX__) && !defined(__BEOS__)
+ struct itimerval ntimeout;
+
+ if (timeleft == 0)
+ timeoutcount = 0;
- /* guard against very long lines */
- buf[MSGBUFSIZE+1] = '\r';
- buf[MSGBUFSIZE+2] = '\n';
- buf[MSGBUFSIZE+3] = '\0';
+ ntimeout.it_interval.tv_sec = ntimeout.it_interval.tv_usec = 0;
+ ntimeout.it_value.tv_sec = timeleft;
+ ntimeout.it_value.tv_usec = 0;
+ setitimer(ITIMER_REAL, &ntimeout, (struct itimerval *)NULL);
+#endif
+}
- n = stuffline(ctl, buf);
+static RETSIGTYPE timeout_handler (int signal)
+/* handle SIGALRM signal indicating a server timeout */
+{
+ (void)signal;
+ if(stage != STAGE_IDLE) {
+ timeoutcount++;
+ /* XXX FIXME: this siglongjmp must die - it's not safe to be
+ * called from a function handler and breaks, for instance,
+ * getaddrinfo() */
+ siglongjmp(restart, THROW_TIMEOUT);
+ } else
+ idletimeout = 1;
+}
- if (n < 0)
- {
- report(stdout, _("writing message text\n"));
- release_sink(ctl);
- return(PS_IOERR);
- }
- else if (outlevel >= O_VERBOSE && !isafile(1))
- {
- fputc('*', stdout);
- fflush(stdout);
- }
- }
- }
+#define CLEANUP_TIMEOUT 60 /* maximum timeout during cleanup */
- return(PS_SUCCESS);
+static int cleanupSockClose (int fd)
+/* close sockets in maximum CLEANUP_TIMEOUT seconds during cleanup */
+{
+ int scerror;
+ SIGHANDLERTYPE alrmsave;
+ alrmsave = set_signal_handler(SIGALRM, null_signal_handler);
+ set_timeout(CLEANUP_TIMEOUT);
+ scerror = SockClose(fd);
+ set_timeout(0);
+ set_signal_handler(SIGALRM, alrmsave);
+ return (scerror);
}
#ifdef KERBEROS_V4
-int
-kerberos_auth (socket, canonical, principal)
+static int kerberos_auth(socket, canonical, principal)
/* authenticate to the server host using Kerberos V4 */
int socket; /* socket to server host */
-#if defined(__FreeBSD__) || defined(__OpenBSD__)
char *canonical; /* server name */
-#else
-const char *canonical; /* server name */
-#endif
char *principal;
{
- char * host_primary;
KTEXT ticket;
MSG_DAT msg_data;
CREDENTIALS cred;
}
}
- xalloca(ticket, KTEXT, sizeof (KTEXT_ST));
+ ticket = xmalloc(sizeof (KTEXT_ST));
rem = (krb_sendauth (0L, socket, ticket,
prin ? prin : "pop",
inst ? inst : canonical,
((struct sockaddr_in *) 0),
((struct sockaddr_in *) 0),
"KPOPV0.1"));
+ free(ticket);
if (prin_copy)
{
free(prin_copy);
}
if (rem != KSUCCESS)
{
- report(stderr, _("kerberos error %s\n"), (krb_get_err_text (rem)));
+ report(stderr, GT_("kerberos error %s\n"), (krb_get_err_text (rem)));
return (PS_AUTHFAIL);
}
return (0);
krb5_auth_context auth_context = NULL;
krb5_init_context(&context);
- krb5_init_ets(context);
krb5_auth_con_init(context, &auth_context);
- if (retval = krb5_cc_default(context, &ccdef)) {
+ if ((retval = krb5_cc_default(context, &ccdef))) {
report(stderr, "krb5_cc_default: %s\n", error_message(retval));
return(PS_ERROR);
}
- if (retval = krb5_cc_get_principal(context, ccdef, &client)) {
+ if ((retval = krb5_cc_get_principal(context, ccdef, &client))) {
report(stderr, "krb5_cc_get_principal: %s\n", error_message(retval));
return(PS_ERROR);
}
- if (retval = krb5_sname_to_principal(context, canonical, "pop",
+ if ((retval = krb5_sname_to_principal(context, canonical, "pop",
KRB5_NT_UNKNOWN,
- &server)) {
+ &server))) {
report(stderr, "krb5_sname_to_principal: %s\n", error_message(retval));
return(PS_ERROR);
}
if (retval) {
#ifdef HEIMDAL
if (err_ret && err_ret->e_text) {
- report(stderr, _("krb5_sendauth: %s [server says '%*s'] \n"),
- error_message(retval),
- err_ret->e_text);
+ char *t = err_ret->e_text;
+ char *tt = sdump(t, strlen(t));
+ report(stderr, GT_("krb5_sendauth: %s [server says '%s']\n"),
+ error_message(retval), tt);
+ free(tt);
#else
if (err_ret && err_ret->text.length) {
- report(stderr, _("krb5_sendauth: %s [server says '%*s'] \n"),
- error_message(retval),
- err_ret->text.length,
- err_ret->text.data);
+ char *tt = sdump(err_ret->text.data, err_ret->text.length);
+ report(stderr, GT_("krb5_sendauth: %s [server says '%s']\n"),
+ error_message(retval), tt);
+ free(tt);
#endif
krb5_free_error(context, err_ret);
} else
current = tmp;
}
}
- else /* skip this item */
- {
- prev = current;
- current = current->next;
- }
- } while(current);
-
- *skipped_list = head;
-}
+ else /* skip this item */
+ {
+ prev = current;
+ current = current->next;
+ }
+ } while(current);
+
+ *skipped_list = head;
+}
+
+static void send_size_warnings(struct query *ctl)
+/* send warning mail with skipped msg; reset msg count when user notified */
+{
+ int size, nbr;
+ int msg_to_send = FALSE;
+ struct idlist *head=NULL, *current=NULL;
+ int max_warning_poll_count;
+
+ head = ctl->skipped;
+ if (!head)
+ return;
+
+ /* don't start a notification message unless we need to */
+ for (current = head; current; current = current->next)
+ if (current->val.status.num == 0 && current->val.status.mark)
+ msg_to_send = TRUE;
+ if (!msg_to_send)
+ return;
+
+ /*
+ * There's no good way to recover if we can't send notification mail,
+ * but it's not a disaster, either, since the skipped mail will not
+ * be deleted.
+ */
+ if (open_warning_by_mail(ctl))
+ return;
+ stuff_warning(iana_charset, ctl,
+ GT_("Subject: Fetchmail oversized-messages warning"));
+ stuff_warning(NULL, ctl, "%s", "");
+ if (ctl->limitflush)
+ stuff_warning(NULL, ctl,
+ GT_("The following oversized messages were deleted on server %s account %s:"),
+ ctl->server.pollname, ctl->remotename);
+ else
+ stuff_warning(NULL, ctl,
+ GT_("The following oversized messages remain on server %s account %s:"),
+ ctl->server.pollname, ctl->remotename);
+
+ stuff_warning(NULL, ctl, "%s", "");
+
+ if (run.poll_interval == 0)
+ max_warning_poll_count = 0;
+ else
+ max_warning_poll_count = ctl->warnings/run.poll_interval;
+
+ /* parse list of skipped msg, adding items to the mail */
+ for (current = head; current; current = current->next)
+ {
+ if (current->val.status.num == 0 && current->val.status.mark)
+ {
+ nbr = current->val.status.mark;
+ size = atoi(current->id);
+ if (ctl->limitflush)
+ stuff_warning(NULL, ctl,
+ ngettext(" %d message %d octets long deleted by fetchmail.",
+ " %d messages %d octets long deleted by fetchmail.", nbr),
+ nbr, size);
+ else
+ stuff_warning(NULL, ctl,
+ ngettext(" %d message %d octets long skipped by fetchmail.",
+ " %d messages %d octets long skipped by fetchmail.", nbr),
+ nbr, size);
+ }
+ current->val.status.num++;
+ current->val.status.mark = 0;
+
+ if (current->val.status.num >= max_warning_poll_count)
+ current->val.status.num = 0;
+ }
+
+ stuff_warning(NULL, ctl, "%s", "");
+
+ close_warning_by_mail(ctl, (struct msgblk *)NULL);
+}
+
+static void mark_oversized(struct query *ctl, int size)
+/* mark a message oversized */
+{
+ struct idlist *current=NULL, *tmp=NULL;
+ char sizestr[32];
+ int cnt;
+
+ /* convert size to string */
+ snprintf(sizestr, sizeof(sizestr), "%d", size);
+
+ /* build a list of skipped messages
+ * val.id = size of msg (string cnvt)
+ * val.status.num = warning_poll_count
+ * val.status.mask = nbr of msg this size
+ */
+
+ current = ctl->skipped;
+
+ /* initialise warning_poll_count to the
+ * current value so that all new msg will
+ * be included in the next mail
+ */
+ cnt = current ? current->val.status.num : 0;
+
+ /* if entry exists, increment the count */
+ if (current && (tmp = str_in_list(¤t, sizestr, FALSE)))
+ {
+ tmp->val.status.mark++;
+ }
+ /* otherwise, create a new entry */
+ /* initialise with current poll count */
+ else
+ {
+ tmp = save_str(&ctl->skipped, sizestr, 1);
+ tmp->val.status.num = cnt;
+ }
+}
+
+static int eat_trailer(int sock, struct query *ctl)
+{
+ /* we only need this LF if we're printing ticker dots
+ * AND we are dumping protocol traces. */
+ if (outlevel >= O_VERBOSE && want_progress()) fputc('\n', stdout);
+ return (ctl->server.base_protocol->trail)(sock, ctl, tag);
+}
+
+static int fetch_messages(int mailserver_socket, struct query *ctl,
+ int count, int **msgsizes, int maxfetch,
+ int *fetches, int *dispatches, int *deletions,
+ int *transient_errors)
+/* fetch messages in lockstep mode */
+{
+ flag force_retrieval;
+ int num, firstnum = 1, lastnum = 0, err, len;
+ int fetchsizelimit = ctl->fetchsizelimit;
+ int msgsize;
+ int initialfetches = *fetches;
+
+ if (ctl->server.base_protocol->getpartialsizes && NUM_NONZERO(fetchsizelimit))
+ {
+ /* for POP3, we can get the size of one mail only! Unfortunately, this
+ * protocol specific test cannot be done elsewhere as the protocol
+ * could be "auto". */
+ switch (ctl->server.protocol)
+ {
+ case P_POP3: case P_APOP: case P_RPOP:
+ fetchsizelimit = 1;
+ }
+
+ /* Time to allocate memory to store the sizes */
+ xfree(*msgsizes);
+ *msgsizes = (int *)xmalloc(sizeof(int) * fetchsizelimit);
+ }
+
+ /*
+ * What forces this code is that in POP2 and
+ * IMAP2bis you can't fetch a message without
+ * having it marked `seen'. In POP3 and IMAP4, on the
+ * other hand, you can (peek_capable is set by
+ * each driver module to convey this; it's not a
+ * method constant because of the difference between
+ * IMAP2bis and IMAP4, and because POP3 doesn't peek
+ * if fetchall is on).
+ *
+ * The result of being unable to peek is that if there's
+ * any kind of transient error (DNS lookup failure, or
+ * sendmail refusing delivery due to process-table limits)
+ * the message will be marked "seen" on the server without
+ * having been delivered. This is not a big problem if
+ * fetchmail is running in foreground, because the user
+ * will see a "skipped" message when it next runs and get
+ * clued in.
+ *
+ * But in daemon mode this leads to the message
+ * being silently ignored forever. This is not
+ * acceptable.
+ *
+ * We compensate for this by checking the error
+ * count from the previous pass and forcing all
+ * messages to be considered new if it's nonzero.
+ */
+ force_retrieval = !peek_capable && (ctl->errcount > 0);
+
+ for (num = 1; num <= count; num++)
+ {
+ flag suppress_delete = FALSE;
+ flag suppress_forward = FALSE;
+ flag suppress_readbody = FALSE;
+ flag retained = FALSE;
+ int msgcode = MSGLEN_UNKNOWN;
+
+ /* check if the message is old
+ * Note: the size of the message may not be known here */
+ if (ctl->fetchall || force_retrieval) {
+ /* empty */
+ } else {
+ if (ctl->server.base_protocol->is_old && (ctl->server.base_protocol->is_old)(mailserver_socket,ctl,num)) {
+ msgcode = MSGLEN_OLD;
+ }
+ }
+ if (msgcode == MSGLEN_OLD)
+ {
+ /*
+ * To avoid flooding the logs when using --keep, report
+ * skipping for old messages only when --flush is on.
+ */
+ if (outlevel > O_SILENT && ctl->flush)
+ {
+ report_build(stdout,
+ GT_("skipping message %s@%s:%d"),
+ ctl->remotename, ctl->server.truename, num);
+ }
+
+ goto flagthemail;
+ }
+
+ if (ctl->server.base_protocol->getpartialsizes && NUM_NONZERO(fetchsizelimit) &&
+ lastnum < num)
+ {
+ /* Instead of getting the sizes of all mails at the start, we get
+ * the sizes in blocks of fetchsizelimit. This leads to better
+ * performance when there are too many mails (say, 10000) in
+ * the mailbox and either we are not getting all the mails at
+ * one go (--fetchlimit 100) or there is a frequent socket
+ * error while just getting the sizes of all mails! */
+
+ int i;
+ int oldstage = stage;
+ firstnum = num;
+ lastnum = num + fetchsizelimit - 1;
+ if (lastnum > count)
+ lastnum = count;
+ for (i = 0; i < fetchsizelimit; i++)
+ (*msgsizes)[i] = 0;
+
+ stage = STAGE_GETSIZES;
+ err = (ctl->server.base_protocol->getpartialsizes)(mailserver_socket, num, lastnum, *msgsizes);
+ if (err != 0) {
+ return err;
+ }
+ stage = oldstage;
+ }
+
+ msgsize = *msgsizes ? (*msgsizes)[num-firstnum] : 0;
+
+ /* check if the message is oversized */
+ if (NUM_NONZERO(ctl->limit) && (msgsize > ctl->limit))
+ msgcode = MSGLEN_TOOLARGE;
+/* else if (msgsize == 512)
+ msgcode = MSGLEN_OLD; (hmh) sample code to skip message */
+
+ if (msgcode < 0)
+ {
+ if (msgcode == MSGLEN_TOOLARGE)
+ {
+ mark_oversized(ctl, msgsize);
+ if (!ctl->limitflush)
+ suppress_delete = TRUE;
+ }
+ if (outlevel > O_SILENT)
+ {
+ /* old messages are already handled above */
+ report_build(stdout,
+ GT_("skipping message %s@%s:%d (%d octets)"),
+ ctl->remotename, ctl->server.truename, num,
+ msgsize);
+ switch (msgcode)
+ {
+ case MSGLEN_INVALID:
+ /*
+ * Invalid lengths are produced by Post Office/NT's
+ * annoying habit of randomly prepending bogus
+ * LIST items of length -1. Patrick Audley
+ * <paudley@pobox.com> tells us: LIST shows a
+ * size of -1, RETR and TOP return "-ERR
+ * System error - couldn't open message", and
+ * DELE succeeds but doesn't actually delete
+ * the message.
+ */
+ report_build(stdout, GT_(" (length -1)"));
+ break;
+ case MSGLEN_TOOLARGE:
+ report_build(stdout, GT_(" (oversized)"));
+ break;
+ }
+ }
+ }
+ else
+ {
+ /* XXX FIXME: make this one variable, wholesize and
+ separatefetchbody query the same variable just with
+ inverted logic */
+ flag wholesize = !ctl->server.base_protocol->fetch_body;
+ flag separatefetchbody = (ctl->server.base_protocol->fetch_body) ? TRUE : FALSE;
+
+ /* request a message */
+ err = (ctl->server.base_protocol->fetch_headers)(mailserver_socket,ctl,num, &len);
+ if (err == PS_TRANSIENT) /* server is probably Exchange */
+ {
+ report(stdout,
+ GT_("couldn't fetch headers, message %s@%s:%d (%d octets)\n"),
+ ctl->remotename, ctl->server.truename, num,
+ msgsize);
+ (*transient_errors)++;
+ continue;
+ }
+ else if (err != 0)
+ return(err);
+
+ /* -1 means we didn't see a size in the response */
+ if (len == -1)
+ {
+ len = msgsize;
+ wholesize = TRUE;
+ }
+
+ if (outlevel > O_SILENT)
+ {
+ report_build(stdout, GT_("reading message %s@%s:%d of %d"),
+ ctl->remotename, ctl->server.truename,
+ num, count);
+
+ if (len > 0)
+ report_build(stdout, wholesize ? GT_(" (%d octets)")
+ : GT_(" (%d header octets)"), len);
+ if (want_progress()) {
+ /* flush and add a blank to append ticker dots */
+ report_flush(stdout);
+ putchar(' ');
+ }
+ }
+
+ /*
+ * Read the message headers and ship them to the
+ * output sink.
+ */
+ err = readheaders(mailserver_socket, len, msgsize,
+ ctl, num,
+ /* pass the suppress_readbody flag only if the underlying
+ * protocol does not fetch the body separately */
+ separatefetchbody ? 0 : &suppress_readbody);
+
+ if (err == PS_RETAINED)
+ suppress_forward = suppress_delete = retained = TRUE;
+ else if (err == PS_TRANSIENT)
+ {
+ suppress_delete = suppress_forward = TRUE;
+ (*transient_errors)++;
+ }
+ else if (err == PS_REFUSED)
+ suppress_forward = TRUE;
+ else if (err)
+ return(err);
+
+ /* tell server we got it OK and resynchronize */
+ if (separatefetchbody && ctl->server.base_protocol->trail)
+ {
+ err = eat_trailer(mailserver_socket, ctl);
+ if (err) return(err);
+ }
+
+ /* do not read the body which is not being forwarded only if
+ * the underlying protocol allows the body to be fetched
+ * separately */
+ if (separatefetchbody && suppress_forward)
+ suppress_readbody = TRUE;
+
+ /*
+ * If we're using IMAP4 or something else that
+ * can fetch headers separately from bodies,
+ * it's time to request the body now. This
+ * fetch may be skipped if we got an anti-spam
+ * or other PS_REFUSED error response during
+ * readheaders.
+ */
+ if (!suppress_readbody)
+ {
+ if (separatefetchbody)
+ {
+ len = -1;
+ if ((err=(ctl->server.base_protocol->fetch_body)(mailserver_socket,ctl,num,&len)))
+ return(err);
+ /*
+ * Work around a bug in Novell's
+ * broken GroupWise IMAP server;
+ * its body FETCH response is missing
+ * the required length for the data
+ * string. This violates RFC2060.
+ */
+ if (len == -1)
+ len = msgsize - msgblk.msglen;
+ if (!wholesize) {
+ if (outlevel > O_SILENT)
+ report_build(stdout,
+ GT_(" (%d body octets)"), len);
+ if (want_progress()) {
+ report_flush(stdout);
+ putchar(' ');
+ }
+ }
+ }
+
+ /* process the body now */
+ err = readbody(mailserver_socket,
+ ctl,
+ !suppress_forward,
+ len);
+
+ if (err == PS_TRANSIENT)
+ {
+ suppress_delete = suppress_forward = TRUE;
+ (*transient_errors)++;
+ }
+ else if (err)
+ return(err);
+
+ /* tell server we got it OK and resynchronize */
+ if (ctl->server.base_protocol->trail) {
+ err = eat_trailer(mailserver_socket, ctl);
+ if (err) return(err);
+ }
+ }
+
+ /* count # messages forwarded on this pass */
+ if (!suppress_forward)
+ (*dispatches)++;
+
+ /*
+ * Check to see if the numbers matched?
+ *
+ * Yes, some servers foo this up horribly.
+ * All IMAP servers seem to get it right, and
+ * so does Eudora QPOP at least in 2.xx
+ * versions.
+ *
+ * Microsoft Exchange gets it completely
+ * wrong, reporting compressed rather than
+ * actual sizes (so the actual length of
+ * message is longer than the reported size).
+ * Another fine example of Microsoft brain death!
+ *
+ * Some older POP servers, like the old UCB
+ * POP server and the pre-QPOP QUALCOMM
+ * versions, report a longer size in the LIST
+ * response than actually gets shipped up.
+ * It's unclear what is going on here, as the
+ * QUALCOMM server (at least) seems to be
+ * reporting the on-disk size correctly.
+ *
+ * qmail-pop3d also goofs up message sizes and does not
+ * count the line end characters properly.
+ */
+ if (msgblk.msglen != msgsize)
+ {
+ if (outlevel >= O_DEBUG)
+ report(stdout,
+ GT_("message %s@%s:%d was not the expected length (%d actual != %d expected)\n"),
+ ctl->remotename, ctl->server.truename, num,
+ msgblk.msglen, msgsize);
+ }
+
+ /* end-of-message processing starts here */
+ if (!close_sink(ctl, &msgblk, !suppress_forward))
+ {
+ ctl->errcount++;
+ suppress_delete = TRUE;
+ }
+ if (!retained)
+ (*fetches)++;
+ }
-static void send_size_warnings(struct query *ctl)
-/* send warning mail with skipped msg; reset msg count when user notified */
-{
- int size, nbr;
- int msg_to_send = FALSE;
- struct idlist *head=NULL, *current=NULL;
- int max_warning_poll_count;
+flagthemail:
+ /*
+ * At this point in flow of control,
+ * either we've bombed on a protocol error
+ * or had delivery refused by the SMTP server
+ * or we've seen `accepted for delivery' and the message is shipped.
+ * It's safe to mark the message seen and delete it on the server now.
+ */
- head = ctl->skipped;
- if (!head)
- return;
+ /* in softbounce mode, suppress deletion and marking as seen */
+ if (suppress_forward)
+ suppress_delete = suppress_delete || run.softbounce;
- /* don't start a notification message unless we need to */
- for (current = head; current; current = current->next)
- if (current->val.status.num == 0 && current->val.status.mark)
- msg_to_send = TRUE;
- if (!msg_to_send)
- return;
+ /* maybe we delete this message now? */
+ if (retained)
+ {
+ if (outlevel > O_SILENT)
+ report_complete(stdout, GT_(" retained\n"));
+ }
+ else if (ctl->server.base_protocol->delete_msg
+ && !suppress_delete
+ && ((msgcode >= 0 && !ctl->keep)
+ || (msgcode == MSGLEN_OLD && ctl->flush)
+ || (msgcode == MSGLEN_TOOLARGE && ctl->limitflush)))
+ {
+ (*deletions)++;
+ if (outlevel > O_SILENT)
+ report_complete(stdout, GT_(" flushed\n"));
+ err = (ctl->server.base_protocol->delete_msg)(mailserver_socket, ctl, num);
+ if (err != 0)
+ return(err);
+ }
+ else
+ {
+ /*
+ * To avoid flooding the logs when using --keep, report
+ * skipping of new messages only.
+ */
+ if (outlevel > O_SILENT && msgcode != MSGLEN_OLD)
+ report_complete(stdout, GT_(" not flushed\n"));
- /*
- * There's no good way to recover if we can't send notification mail,
- * but it's not a disaster, either, since the skipped mail will not
- * be deleted.
- */
- if (open_warning_by_mail(ctl, (struct msgblk *)NULL))
- return;
- stuff_warning(ctl,
- _("Subject: Fetchmail oversized-messages warning.\r\n"
- "\r\n"
- "The following oversized messages remain on the mail server %s:"),
- ctl->server.pollname);
-
- if (run.poll_interval == 0)
- max_warning_poll_count = 0;
- else
- max_warning_poll_count = ctl->warnings/run.poll_interval;
+ /* maybe we mark this message as seen now? */
+ if (ctl->server.base_protocol->mark_seen
+ && !suppress_delete
+ && (msgcode >= 0 && ctl->keep))
+ {
+ err = (ctl->server.base_protocol->mark_seen)(mailserver_socket, ctl, num);
+ if (err != 0)
+ return(err);
+ }
+ }
- /* parse list of skipped msg, adding items to the mail */
- for (current = head; current; current = current->next)
- {
- if (current->val.status.num == 0 && current->val.status.mark)
+ /* perhaps this as many as we're ready to handle */
+ if (maxfetch && maxfetch <= *fetches && num < count)
{
- nbr = current->val.status.mark;
- size = atoi(current->id);
- stuff_warning(ctl,
- _("\t%d msg %d octets long skipped by fetchmail.\r\n"),
- nbr, size);
+ int remcount = count - (*fetches - initialfetches);
+ report(stdout,
+ ngettext("fetchlimit %d reached; %d message left on server %s account %s\n",
+ "fetchlimit %d reached; %d messages left on server %s account %s\n", remcount),
+ maxfetch, remcount, ctl->server.truename, ctl->remotename);
+ return(PS_MAXFETCH);
}
- current->val.status.num++;
- current->val.status.mark = 0;
-
- if (current->val.status.num >= max_warning_poll_count)
- current->val.status.num = 0;
- }
+ } /* for (num = 1; num <= count; num++) */
- close_warning_by_mail(ctl, (struct msgblk *)NULL);
+ return(PS_SUCCESS);
}
-static int do_session(ctl, proto, maxfetch)
/* retrieve messages from server using given protocol method table */
-struct query *ctl; /* parsed options with merged-in defaults */
-const struct method *proto; /* protocol method table */
-const int maxfetch; /* maximum number of messages to fetch */
+static int do_session(
+ /* parsed options with merged-in defaults */
+ struct query *ctl,
+ /* protocol method table */
+ const struct method *proto,
+ /* maximum number of messages to fetch */
+ const int maxfetch)
{
- int js;
-#ifdef HAVE_VOLATILE
- volatile int ok, mailserver_socket = -1; /* pacifies -Wall */
-#else
- int ok, mailserver_socket = -1;
-#endif /* HAVE_VOLATILE */
+ static int *msgsizes;
+ volatile int err, mailserver_socket = -1; /* pacifies -Wall */
+ int tmperr;
+ int deletions = 0, js;
const char *msg;
- void (*pipesave)(int);
- void (*alrmsave)(int);
- struct idlist *current=NULL, *tmp=NULL;
+ SIGHANDLERTYPE alrmsave;
- protocol = proto;
- ctl->server.base_protocol = protocol;
+ ctl->server.base_protocol = proto;
+ msgsizes = NULL;
pass = 0;
- tagnum = 0;
- tag[0] = '\0'; /* nuke any tag hanging out from previous query */
- ok = 0;
+ err = 0;
+ init_transact(proto);
/* set up the server-nonresponse timeout */
- alrmsave = signal(SIGALRM, timeout_handler);
+ alrmsave = set_signal_handler(SIGALRM, timeout_handler);
mytimeout = ctl->server.timeout;
- /* set up the broken-pipe timeout */
- pipesave = signal(SIGPIPE, sigpipe_handler);
-
- if ((js = setjmp(restart)))
+ if ((js = sigsetjmp(restart,1)))
{
-#ifdef HAVE_SIGPROCMASK
- /*
- * Don't rely on setjmp() to restore the blocked-signal mask.
- * It does this under BSD but is required not to under POSIX.
- *
- * If your Unix doesn't have sigprocmask, better hope it has
- * BSD-like behavior. Otherwise you may see fetchmail get
- * permanently wedged after a second timeout on a bad read,
- * because alarm signals were blocked after the first.
- */
+ /* exception caught */
sigset_t allsigs;
sigfillset(&allsigs);
sigprocmask(SIG_UNBLOCK, &allsigs, NULL);
-#endif /* HAVE_SIGPROCMASK */
- if (js == THROW_SIGPIPE)
- {
- signal(SIGPIPE, SIG_IGN);
- report(stdout,
- _("SIGPIPE thrown from an MDA or a stream socket error\n"));
- ok = PS_SOCKET;
- goto cleanUp;
+ if (ai0) {
+ fm_freeaddrinfo(ai0); ai0 = NULL;
+ }
+
+ if (ai1) {
+ fm_freeaddrinfo(ai1); ai1 = NULL;
}
- else if (js == THROW_TIMEOUT)
+
+ if (js == THROW_TIMEOUT)
{
if (phase == OPEN_WAIT)
report(stdout,
- _("timeout after %d seconds waiting to connect to server %s.\n"),
+ GT_("timeout after %d seconds waiting to connect to server %s.\n"),
ctl->server.timeout, ctl->server.pollname);
else if (phase == SERVER_WAIT)
report(stdout,
- _("timeout after %d seconds waiting for server %s.\n"),
+ GT_("timeout after %d seconds waiting for server %s.\n"),
ctl->server.timeout, ctl->server.pollname);
else if (phase == FORWARDING_WAIT)
report(stdout,
- _("timeout after %d seconds waiting for %s.\n"),
+ GT_("timeout after %d seconds waiting for %s.\n"),
ctl->server.timeout,
ctl->mda ? "MDA" : "SMTP");
else if (phase == LISTENER_WAIT)
report(stdout,
- _("timeout after %d seconds waiting for listener to respond.\n"), ctl->server.timeout);
+ GT_("timeout after %d seconds waiting for listener to respond.\n"), ctl->server.timeout);
else
report(stdout,
- _("timeout after %d seconds.\n"), ctl->server.timeout);
+ GT_("timeout after %d seconds.\n"), ctl->server.timeout);
/*
* If we've exceeded our threshold for consecutive timeouts,
* timeouts just mean the frequency of mail is low.
*/
if (timeoutcount > MAX_TIMEOUTS
- && !open_warning_by_mail(ctl, (struct msgblk *)NULL))
+ && !open_warning_by_mail(ctl))
{
- stuff_warning(ctl,
- _("Subject: fetchmail sees repeated timeouts\r\n"));
- stuff_warning(ctl,
- _("Fetchmail saw more than %d timeouts while attempting to get mail from %s@%s.\r\n"),
+ stuff_warning(iana_charset, ctl,
+ GT_("Subject: fetchmail sees repeated timeouts"));
+ stuff_warning(NULL, ctl, "%s", "");
+ stuff_warning(NULL, ctl,
+ GT_("Fetchmail saw more than %d timeouts while attempting to get mail from %s@%s.\n"),
MAX_TIMEOUTS,
- ctl->remotename,
- ctl->server.truename);
- stuff_warning(ctl,
- _("This could mean that your mailserver is stuck, or that your SMTP\r\n" \
- "server is wedged, or that your mailbox file on the server has been\r\n" \
- "corrupted by a server error. You can run `fetchmail -v -v' to\r\n" \
- "diagnose the problem.\r\n\r\n" \
- "Fetchmail won't poll this mailbox again until you restart it.\r\n"));
+ ctl->remotename, ctl->server.truename);
+ stuff_warning(NULL, ctl,
+ GT_("This could mean that your mailserver is stuck, or that your SMTP\n" \
+ "server is wedged, or that your mailbox file on the server has been\n" \
+ "corrupted by a server error. You can run `fetchmail -v -v' to\n" \
+ "diagnose the problem.\n\n" \
+ "Fetchmail won't poll this mailbox again until you restart it.\n"));
close_warning_by_mail(ctl, (struct msgblk *)NULL);
ctl->wedged = TRUE;
}
-
- ok = PS_ERROR;
}
- /* try to clean up all streams */
- release_sink(ctl);
- if (ctl->smtp_socket != -1)
- SockClose(ctl->smtp_socket);
- if (mailserver_socket != -1)
- SockClose(mailserver_socket);
+ err = PS_SOCKET;
+ goto cleanUp;
}
else
{
+ /* sigsetjmp returned zero -> normal operation */
char buf[MSGBUFSIZE+1], *realhost;
- int len, num, count, new, bytes, deletions = 0, *msgsizes = NULL;
-#if INET6_ENABLE
- int fetches, dispatches, oldphase;
-#else /* INET6_ENABLE */
- int port, fetches, dispatches, oldphase;
-#endif /* INET6_ENABLE */
+ int count, newm, bytes;
+ int fetches, dispatches, transient_errors, oldphase;
struct idlist *idp;
/* execute pre-initialization command, if any */
- if (ctl->preconnect && (ok = system(ctl->preconnect)))
+ if (ctl->preconnect && (err = system(ctl->preconnect)))
{
- report(stderr,
- _("pre-connection command failed with status %d\n"), ok);
- ok = PS_SYNTAX;
+ if (WIFSIGNALED(err))
+ report(stderr,
+ GT_("pre-connection command terminated with signal %d\n"), WTERMSIG(err));
+ else
+ report(stderr,
+ GT_("pre-connection command failed with status %d\n"), WEXITSTATUS(err));
+ err = PS_SYNTAX;
goto closeUp;
}
oldphase = phase;
phase = OPEN_WAIT;
set_timeout(mytimeout);
-#if !INET6_ENABLE
-#ifdef SSL_ENABLE
- port = ctl->server.port ? ctl->server.port : ( ctl->use_ssl ? protocol->sslport : protocol->port );
-#else
- port = ctl->server.port ? ctl->server.port : protocol->port;
+
+#ifdef HAVE_PKG_hesiod
+ /* If either the pollname or vianame are "hesiod" we want to
+ lookup the user's hesiod pobox host */
+ if (!strcasecmp(ctl->server.queryname, "hesiod")) {
+ struct hes_postoffice *hes_p;
+ hes_p = hes_getmailhost(ctl->remotename);
+ if (hes_p != NULL && strcmp(hes_p->po_type, "POP") == 0) {
+ free(ctl->server.queryname);
+ ctl->server.queryname = xstrdup(hes_p->po_host);
+ if (ctl->server.via)
+ free(ctl->server.via);
+ ctl->server.via = xstrdup(hes_p->po_host);
+ } else {
+ report(stderr,
+ GT_("couldn't find HESIOD pobox for %s\n"),
+ ctl->remotename);
+ }
+ }
+#endif /* HESIOD */
+
+ /*
+ * Canonicalize the server truename for later use. This also
+ * functions as a probe for whether the mailserver is accessible.
+ * We try it on each poll cycle until we get a result. This way,
+ * fetchmail won't fail if started up when the network is inaccessible.
+ */
+ if (ctl->server.dns && !ctl->server.trueaddr)
+ {
+ if (ctl->server.lead_server)
+ {
+ char *leadname = ctl->server.lead_server->truename;
+
+ /* prevent core dump from ill-formed or duplicate entry */
+ if (!leadname)
+ {
+ report(stderr, GT_("Lead server has no name.\n"));
+ err = PS_DNS;
+ set_timeout(0);
+ phase = oldphase;
+ goto closeUp;
+ }
+
+ xfree(ctl->server.truename);
+ ctl->server.truename = xstrdup(leadname);
+ }
+ else
+ {
+ struct addrinfo hints, *res;
+ int error;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_flags = AI_CANONNAME;
+#ifdef AI_ADDRCONFIG
+ hints.ai_flags |= AI_ADDRCONFIG;
#endif
-#endif /* !INET6_ENABLE */
+
+ error = fm_getaddrinfo(ctl->server.queryname, NULL, &hints, &res);
+ if (error)
+ {
+ report(stderr,
+ GT_("couldn't find canonical DNS name of %s (%s): %s\n"),
+ ctl->server.pollname, ctl->server.queryname,
+ gai_strerror(error));
+ err = PS_DNS;
+ set_timeout(0);
+ phase = oldphase;
+ goto closeUp;
+ }
+ else
+ {
+ xfree(ctl->server.truename);
+ /* Older FreeBSD versions return NULL in ai_canonname
+ * if they cannot canonicalize, rather than copying
+ * the queryname here, as IEEE Std 1003.1-2001
+ * requires. Work around NULL. */
+ if (res->ai_canonname != NULL) {
+ ctl->server.truename = xstrdup(res->ai_canonname);
+ } else {
+ ctl->server.truename = xstrdup(ctl->server.queryname);
+ }
+ ctl->server.trueaddr = (struct sockaddr *)xmalloc(res->ai_addrlen);
+ ctl->server.trueaddr_len = res->ai_addrlen;
+ memcpy(ctl->server.trueaddr, res->ai_addr, res->ai_addrlen);
+ fm_freeaddrinfo(res);
+ }
+ }
+ }
+
realhost = ctl->server.via ? ctl->server.via : ctl->server.pollname;
/* allow time for the port to be set up if we have a plugin */
if (ctl->server.plugin)
(void)sleep(1);
-#if INET6_ENABLE
if ((mailserver_socket = SockOpen(realhost,
- ctl->server.service ? ctl->server.service : ( ctl->use_ssl ? protocol->sslservice : protocol->service ),
- ctl->server.netsec, ctl->server.plugin)) == -1)
-#else /* INET6_ENABLE */
- if ((mailserver_socket = SockOpen(realhost, port, NULL, ctl->server.plugin)) == -1)
-#endif /* INET6_ENABLE */
+ ctl->server.service ? ctl->server.service : ( ctl->use_ssl ? ctl->server.base_protocol->sslservice : ctl->server.base_protocol->service ),
+ ctl->server.plugin, &ai0)) == -1)
{
char errbuf[BUFSIZ];
-#if !INET6_ENABLE
int err_no = errno;
-#ifdef HAVE_RES_SEARCH
- if (err_no != 0 && h_errno != 0)
- report(stderr, _("fetchmail: internal inconsistency\n"));
-#endif
/*
* Avoid generating a bogus error every poll cycle when we're
* in daemon mode but the connection to the outside world
if (!((err_no == EHOSTUNREACH || err_no == ENETUNREACH)
&& run.poll_interval))
{
- report_build(stderr, _("fetchmail: %s connection to %s failed"),
- protocol->name, ctl->server.pollname);
-#ifdef HAVE_RES_SEARCH
- if (h_errno != 0)
- {
- if (h_errno == HOST_NOT_FOUND)
- strcpy(errbuf, _("host is unknown."));
-#ifndef __BEOS__
- else if (h_errno == NO_ADDRESS)
- strcpy(errbuf, _("name is valid but has no IP address."));
-#endif
- else if (h_errno == NO_RECOVERY)
- strcpy(errbuf, _("unrecoverable name server error."));
- else if (h_errno == TRY_AGAIN)
- strcpy(errbuf, _("temporary name server error."));
- else
- sprintf(errbuf, _("unknown DNS error %d."), h_errno);
- }
- else
-#endif /* HAVE_RES_SEARCH */
- strcpy(errbuf, strerror(err_no));
+ report_build(stderr, GT_("%s connection to %s failed"),
+ ctl->server.base_protocol->name, ctl->server.pollname);
+ strlcpy(errbuf, strerror(err_no), sizeof(errbuf));
report_complete(stderr, ": %s\n", errbuf);
-#ifdef __UNUSED
- /*
- * Don't use this. It was an attempt to address Debian bug
- * #47143 (Notify user by mail when pop server nonexistent).
- * Trouble is, that doesn't work; you trip over the case
- * where your SLIP or PPP link is down...
- */
- /* warn the system administrator */
- if (open_warning_by_mail(ctl, (struct msgblk *)NULL) == 0)
- {
- stuff_warning(ctl,
- _("Subject: Fetchmail unreachable-server warning.\r\n"
- "\r\n"
- "Fetchmail could not reach the mail server %s:")
- ctl->server.pollname);
- stuff_warning(ctl, errbuf, ctl->server.pollname);
- close_warning_by_mail(ctl, (struct msgblk *)NULL);
- }
-#endif
}
-#endif /* INET6_ENABLE */
- ok = PS_SOCKET;
+ err = PS_SOCKET;
set_timeout(0);
phase = oldphase;
goto closeUp;
}
- set_timeout(0);
- phase = oldphase;
#ifdef SSL_ENABLE
+ /* Save the socket opened. Useful if Fetchmail hangs on SSLOpen
+ * because the socket can be closed.
+ */
+ mailserver_socket_temp = mailserver_socket;
+ set_timeout(mytimeout);
+
/* perform initial SSL handshake on open connection */
- /* Note: We pass the realhost name over for certificate
- verification. We may want to make this configurable */
- if (ctl->use_ssl && SSLOpen(mailserver_socket,ctl->sslkey,ctl->sslcert,realhost) == -1)
+ if (ctl->use_ssl &&
+ SSLOpen(mailserver_socket, ctl->sslcert, ctl->sslkey,
+ ctl->sslproto, ctl->sslcertck,
+ ctl->sslcertfile, ctl->sslcertpath,
+ ctl->sslfingerprint, ctl->sslcommonname ?
+ ctl->sslcommonname : realhost, ctl->server.pollname,
+ &ctl->remotename) == -1)
{
- report(stderr, _("SSL connection failed.\n"));
- goto closeUp;
+ set_timeout(0);
+ report(stderr, GT_("SSL connection failed.\n"));
+ err = PS_SOCKET;
+ goto cleanUp;
}
+
+ /* Fetchmail didn't hang on SSLOpen,
+ * then no need to set mailserver_socket_temp
+ */
+ mailserver_socket_temp = -1;
#endif
-
+
+ /* A timeout is still defined before SSLOpen,
+ * then Fetchmail hanging on SSLOpen is handled.
+ */
+ set_timeout(0);
+ phase = oldphase;
#ifdef KERBEROS_V4
- if (ctl->server.preauthenticate == A_KERBEROS_V4)
+ if (ctl->server.authenticate == A_KERBEROS_V4 && (strcasecmp(proto->name,"IMAP") != 0))
{
set_timeout(mytimeout);
- ok = kerberos_auth(mailserver_socket, ctl->server.truename,
+ err = kerberos_auth(mailserver_socket, ctl->server.truename,
ctl->server.principal);
set_timeout(0);
- if (ok != 0)
+ if (err != 0)
goto cleanUp;
}
#endif /* KERBEROS_V4 */
#ifdef KERBEROS_V5
- if (ctl->server.preauthenticate == A_KERBEROS_V5)
+ if (ctl->server.authenticate == A_KERBEROS_V5)
{
set_timeout(mytimeout);
- ok = kerberos5_auth(mailserver_socket, ctl->server.truename);
+ err = kerberos5_auth(mailserver_socket, ctl->server.truename);
set_timeout(0);
- if (ok != 0)
+ if (err != 0)
goto cleanUp;
}
#endif /* KERBEROS_V5 */
/* accept greeting message from mail server */
- ok = (protocol->parse_response)(mailserver_socket, buf);
- if (ok != 0)
+ err = (ctl->server.base_protocol->parse_response)(mailserver_socket, buf);
+ if (err != 0)
goto cleanUp;
/* try to get authorized to fetch mail */
stage = STAGE_GETAUTH;
- if (protocol->getauth)
+ if (ctl->server.base_protocol->getauth)
{
- if (protocol->password_canonify)
- (protocol->password_canonify)(shroud, ctl->password, PASSWORDLEN);
- else
- strcpy(shroud, ctl->password);
+ set_timeout(mytimeout);
+ err = (ctl->server.base_protocol->getauth)(mailserver_socket, ctl, buf);
+ set_timeout(0);
- ok = (protocol->getauth)(mailserver_socket, ctl, buf);
- if (ok != 0)
+ if (err != 0)
{
- if (ok == PS_LOCKBUSY)
- report(stderr, _("Lock-busy error on %s@%s\n"),
+ if (err == PS_LOCKBUSY)
+ report(stderr, GT_("Lock-busy error on %s@%s\n"),
ctl->remotename,
ctl->server.truename);
- else if (ok == PS_AUTHFAIL)
- {
- report(stderr, _("Authorization failure on %s@%s\n"),
+ else if (err == PS_SERVBUSY)
+ report(stderr, GT_("Server busy error on %s@%s\n"),
ctl->remotename,
ctl->server.truename);
+ else if (err == PS_AUTHFAIL)
+ {
+ report(stderr, GT_("Authorization failure on %s@%s%s\n"),
+ ctl->remotename,
+ ctl->server.truename,
+ (ctl->wehaveauthed ? GT_(" (previously authorized)") : "")
+ );
+ if (ctl->server.authenticate == A_ANY && !ctl->wehaveauthed) {
+ report(stderr, GT_("For help, see http://www.fetchmail.info/fetchmail-FAQ.html#R15\n"));
+ }
/*
* If we're running in background, try to mail the
* calling user a heads-up about the authentication
* failure once it looks like this isn't a fluke
* due to the server being temporarily inaccessible.
+ * When we get third succesive failure, we notify the user
+ * but only if we haven't already managed to get
+ * authorization. After that, once we get authorization
+ * we let the user know service is restored.
*/
if (run.poll_interval
- && ctl->authfailcount++ > MAX_AUTHFAILS
- && !open_warning_by_mail(ctl, (struct msgblk *)NULL))
+ && !ctl->wehavesentauthnote
+ && ((ctl->wehaveauthed && ++ctl->authfailcount >= 10)
+ || (!ctl->wehaveauthed && ++ctl->authfailcount >= 3))
+ && !open_warning_by_mail(ctl))
{
- stuff_warning(ctl,
- _("Subject: fetchmail authentication failed\r\n"));
- stuff_warning(ctl,
- _("Fetchmail could not get mail from %s@%s.\r\n"),
- ctl->remotename,
- ctl->server.truename);
- stuff_warning(ctl,
- _("The attempt to get authorization failed.\r\n" \
- "This probably means your password is invalid, but POP3 servers have\r\n" \
- "other failure modes that fetchmail cannot distinguish from this\r\n" \
- "because they don't send useful error messages on login failure.\r\n"));
+ ctl->wehavesentauthnote = 1;
+ stuff_warning(iana_charset, ctl,
+ GT_("Subject: fetchmail authentication failed on %s@%s"),
+ ctl->remotename, ctl->server.truename);
+ stuff_warning(NULL, ctl, "%s", "");
+ stuff_warning(NULL, ctl,
+ GT_("Fetchmail could not get mail from %s@%s.\n"),
+ ctl->remotename,
+ ctl->server.truename);
+ if (ctl->wehaveauthed) {
+ stuff_warning(NULL, ctl, GT_("\
+The attempt to get authorization failed.\n\
+Since we have already succeeded in getting authorization for this\n\
+connection, this is probably another failure mode (such as busy server)\n\
+that fetchmail cannot distinguish because the server didn't send a useful\n\
+error message."));
+ stuff_warning(NULL, ctl, GT_("\
+\n\
+However, if you HAVE changed your account details since starting the\n\
+fetchmail daemon, you need to stop the daemon, change your configuration\n\
+of fetchmail, and then restart the daemon.\n\
+\n\
+The fetchmail daemon will continue running and attempt to connect\n\
+at each cycle. No future notifications will be sent until service\n\
+is restored."));
+ } else {
+ stuff_warning(NULL, ctl, GT_("\
+The attempt to get authorization failed.\n\
+This probably means your password is invalid, but some servers have\n\
+other failure modes that fetchmail cannot distinguish from this\n\
+because they don't send useful error messages on login failure.\n\
+\n\
+The fetchmail daemon will continue running and attempt to connect\n\
+at each cycle. No future notifications will be sent until service\n\
+is restored."));
+ }
close_warning_by_mail(ctl, (struct msgblk *)NULL);
- ctl->wedged = TRUE;
}
}
+ else if (err == PS_REPOLL)
+ {
+ if (outlevel >= O_VERBOSE)
+ report(stderr, GT_("Repoll immediately on %s@%s\n"),
+ ctl->remotename,
+ ctl->server.truename);
+ }
else
- report(stderr, _("Unknown login or authentication error on %s@%s\n"),
- ctl->remotename,
- ctl->server.truename);
+ report(stderr, GT_("Unknown login or authentication error on %s@%s\n"),
+ ctl->remotename,
+ ctl->server.truename);
goto cleanUp;
}
+ else
+ {
+ /*
+ * This connection has given us authorization at least once.
+ *
+ * There are dodgy server (clubinternet.fr for example) that
+ * give spurious authorization failures on patently good
+ * account/password details, then 5 minutes later let you in!
+ *
+ * This is meant to build in some tolerance of such nasty bits
+ * of work.
+ */
+ ctl->wehaveauthed = 1;
+ /*if (ctl->authfailcount >= 3)*/
+ if (ctl->wehavesentauthnote)
+ {
+ ctl->wehavesentauthnote = 0;
+ report(stderr,
+ GT_("Authorization OK on %s@%s\n"),
+ ctl->remotename,
+ ctl->server.truename);
+ if (!open_warning_by_mail(ctl))
+ {
+ stuff_warning(iana_charset, ctl,
+ GT_("Subject: fetchmail authentication OK on %s@%s"),
+ ctl->remotename, ctl->server.truename);
+ stuff_warning(NULL, ctl, "%s", "");
+ stuff_warning(NULL, ctl,
+ GT_("Fetchmail was able to log into %s@%s.\n"),
+ ctl->remotename,
+ ctl->server.truename);
+ stuff_warning(NULL, ctl,
+ GT_("Service has been restored.\n"));
+ close_warning_by_mail(ctl, (struct msgblk *)NULL);
+
+ }
+ }
+ /*
+ * Reporting only after the first three
+ * consecutive failures, or ten consecutive
+ * failures after we have managed to get
+ * authorization.
+ */
+ ctl->authfailcount = 0;
+ }
}
ctl->errcount = fetches = 0;
/* now iterate over each folder selected */
for (idp = ctl->mailboxes; idp; idp = idp->next)
{
+ ctl->folder = idp->id;
pass = 0;
do {
dispatches = 0;
+ transient_errors = 0;
++pass;
/* reset timeout, in case we did an IDLE */
if (outlevel >= O_DEBUG)
{
if (idp->id)
- report(stdout, _("selecting or re-polling folder %s\n"), idp->id);
+ report(stdout, GT_("selecting or re-polling folder %s\n"), idp->id);
else
- report(stdout, _("selecting or re-polling default folder\n"));
+ report(stdout, GT_("selecting or re-polling default folder\n"));
}
/* compute # of messages and number of new messages waiting */
stage = STAGE_GETRANGE;
- ok = (protocol->getrange)(mailserver_socket, ctl, idp->id, &count, &new, &bytes);
- if (ok != 0)
+ err = (ctl->server.base_protocol->getrange)(mailserver_socket, ctl, idp->id, &count, &newm, &bytes);
+ if (err != 0)
goto cleanUp;
/* show user how many messages we downloaded */
if (idp->id)
- (void) sprintf(buf, _("%s at %s (folder %s)"),
- ctl->remotename, ctl->server.truename, idp->id);
+ (void) snprintf(buf, sizeof(buf),
+ GT_("%s at %s (folder %s)"),
+ ctl->remotename, ctl->server.pollname, idp->id);
else
- (void) sprintf(buf, _("%s at %s"),
- ctl->remotename, ctl->server.truename);
+ (void) snprintf(buf, sizeof(buf), GT_("%s at %s"),
+ ctl->remotename, ctl->server.pollname);
if (outlevel > O_SILENT)
{
if (count == -1) /* only used for ETRN */
- report(stdout, _("Polling %s\n"), ctl->server.truename);
+ report(stdout, GT_("Polling %s\n"), ctl->server.truename);
else if (count != 0)
{
- if (new != -1 && (count - new) > 0)
- report_build(stdout, _("%d %s (%d seen) for %s"),
- count, count > 1 ? _("messages") :
- _("message"),
- count-new, buf);
+ if (newm != -1 && (count - newm) > 0)
+ report_build(stdout, ngettext("%d message (%d %s) for %s", "%d messages (%d %s) for %s", (unsigned long)count),
+ count,
+ count - newm,
+ ngettext("seen", "seen", (unsigned long)count-newm),
+ buf);
else
- report_build(stdout, _("%d %s for %s"),
- count, count > 1 ? _("messages") :
- _("message"), buf);
+ report_build(stdout, ngettext("%d message for %s",
+ "%d messages for %s",
+ count),
+ count, buf);
if (bytes == -1)
report_complete(stdout, ".\n");
else
- report_complete(stdout, _(" (%d octets).\n"), bytes);
+ report_complete(stdout, GT_(" (%d octets).\n"), bytes);
}
else
{
/* these are pointless in normal daemon mode */
if (pass == 1 && (run.poll_interval == 0 || outlevel >= O_VERBOSE))
- report(stdout, _("No mail for %s\n"), buf);
+ report(stdout, GT_("No mail for %s\n"), buf);
}
}
if (check_only)
{
- if (new == -1 || ctl->fetchall)
- new = count;
- fetches = new; /* set error status ccorrectly */
+ if (newm == -1 || ctl->fetchall)
+ newm = count;
+ fetches = newm; /* set error status correctly */
/*
- * There used to be a `got noerror' here, but this
- * prevneted checking of multiple folders. This
+ * There used to be a `goto noerror' here, but this
+ * prevented checking of multiple folders. This
* comment is a reminder in case I introduced some
* subtle bug by removing it...
*/
}
else if (count > 0)
{
- flag force_retrieval;
+ int i;
/*
- * What forces this code is that in POP2 and
- * IMAP2bis you can't fetch a message without
- * having it marked `seen'. In POP3 and IMAP4, on the
- * other hand, you can (peek_capable is set by
- * each driver module to convey this; it's not a
- * method constant because of the difference between
- * IMAP2bis and IMAP4, and because POP3 doesn't peek
- * if fetchall is on).
- *
- * The result of being unable to peek is that if there's
- * any kind of transient error (DNS lookup failure, or
- * sendmail refusing delivery due to process-table limits)
- * the message will be marked "seen" on the server without
- * having been delivered. This is not a big problem if
- * fetchmail is running in foreground, because the user
- * will see a "skipped" message when it next runs and get
- * clued in.
- *
- * But in daemon mode this leads to the message
- * being silently ignored forever. This is not
- * acceptable.
- *
- * We compensate for this by checking the error
- * count from the previous pass and forcing all
- * messages to be considered new if it's nonzero.
+ * Don't trust the message count passed by the server.
+ * Without this check, it might be possible to do a
+ * DNS-spoofing attack that would pass back a ridiculous
+ * count, and allocate a malloc area that would overlap
+ * a portion of the stack.
*/
- force_retrieval = !peek_capable && (ctl->errcount > 0);
+ if ((unsigned)count > INT_MAX/sizeof(int))
+ {
+ report(stderr, GT_("bogus message count!"));
+ err = PS_PROTOCOL;
+ goto cleanUp;
+ }
/*
* We need the size of each message before it's
* option. If the protocol has a getsizes method,
* we presume this means it doesn't get reliable
* sizes from message fetch responses.
+ *
+ * If the protocol supports getting sizes of subset of
+ * messages, we skip this step now.
*/
- if (proto->getsizes)
+ if (proto->getsizes &&
+ !(proto->getpartialsizes && NUM_NONZERO(ctl->fetchsizelimit)))
{
- int i;
-
- xalloca(msgsizes, int *, sizeof(int) * count);
+ xfree(msgsizes);
+ msgsizes = (int *)xmalloc(sizeof(int) * count);
for (i = 0; i < count; i++)
- msgsizes[i] = -1;
+ msgsizes[i] = 0;
stage = STAGE_GETSIZES;
- ok = (proto->getsizes)(mailserver_socket, count, msgsizes);
- if (ok != 0)
+ err = (proto->getsizes)(mailserver_socket, count, msgsizes);
+ if (err != 0)
goto cleanUp;
if (bytes == -1)
/* read, forward, and delete messages */
stage = STAGE_FETCH;
- for (num = 1; num <= count; num++)
- {
- flag toolarge = NUM_NONZERO(ctl->limit)
- && msgsizes && (msgsizes[num-1] > ctl->limit);
- flag oldmsg = (!new) || (protocol->is_old && (protocol->is_old)(mailserver_socket,ctl,num));
- flag fetch_it = !toolarge
- && (ctl->fetchall || force_retrieval || !oldmsg);
- flag suppress_delete = FALSE;
- flag suppress_forward = FALSE;
- flag suppress_readbody = FALSE;
- flag retained = FALSE;
-
- /*
- * This check copes with Post Office/NT's
- * annoying habit of randomly prepending bogus
- * LIST items of length -1. Patrick Audley
- * <paudley@pobox.com> tells us: LIST shows a
- * size of -1, RETR and TOP return "-ERR
- * System error - couldn't open message", and
- * DELE succeeds but doesn't actually delete
- * the message.
- */
- if (msgsizes && msgsizes[num-1] == -1)
- {
- if (outlevel >= O_VERBOSE)
- report(stdout,
- _("Skipping message %d, length -1\n"),
- num);
- continue;
- }
-
- /*
- * We may want to reject this message if it's old
- * or oversized, and we're not forcing retrieval.
- */
- if (!fetch_it)
- {
- if (outlevel > O_SILENT)
- {
- report_build(stdout,
- _("skipping message %d (%d octets)"),
- num, msgsizes[num-1]);
- if (toolarge && !check_only)
- {
- char size[32];
- int cnt;
-
- /* convert sz to string */
- sprintf(size, "%d", msgsizes[num-1]);
-
- /* build a list of skipped messages
- * val.id = size of msg (string cnvt)
- * val.status.num = warning_poll_count
- * val.status.mask = nbr of msg this size
- */
-
- current = ctl->skipped;
-
- /* initialise warning_poll_count to the
- * current value so that all new msg will
- * be included in the next mail
- */
- cnt = current? current->val.status.num : 0;
-
- /* if entry exists, increment the count */
- if (current &&
- str_in_list(¤t, size, FALSE))
- {
- for ( ; current;
- current = current->next)
- {
- if (strcmp(current->id, size) == 0)
- {
- current->val.status.mark++;
- break;
- }
- }
- }
- /* otherwise, create a new entry */
- /* initialise with current poll count */
- else
- {
- tmp = save_str(&ctl->skipped, size, 1);
- tmp->val.status.num = cnt;
- }
-
- report_build(stdout, _(" (oversized, %d octets)"),
- msgsizes[num-1]);
- }
- }
- }
- else
- {
- flag wholesize = !protocol->fetch_body;
-
- /* request a message */
- ok = (protocol->fetch_headers)(mailserver_socket,ctl,num, &len);
- if (ok != 0)
- goto cleanUp;
-
- /* -1 means we didn't see a size in the response */
- if (len == -1 && msgsizes)
- {
- len = msgsizes[num - 1];
- wholesize = TRUE;
- }
-
- if (outlevel > O_SILENT)
- {
- report_build(stdout, _("reading message %d of %d"),
- num,count);
-
- if (len > 0)
- report_build(stdout, _(" (%d %soctets)"),
- len, wholesize ? "" : _("header "));
- if (outlevel >= O_VERBOSE)
- report_complete(stdout, "\n");
- else
- report_complete(stdout, " ");
- }
-
- /*
- * Read the message headers and ship them to the
- * output sink.
- */
- ok = readheaders(mailserver_socket, len, msgsizes[num-1],
- ctl, num);
- if (ok == PS_RETAINED)
- suppress_forward = retained = TRUE;
- else if (ok == PS_TRANSIENT)
- suppress_delete = suppress_forward = TRUE;
- else if (ok == PS_REFUSED)
- suppress_forward = TRUE;
- else if (ok == PS_TRUNCATED)
- suppress_readbody = TRUE;
- else if (ok)
- goto cleanUp;
-
- /*
- * If we're using IMAP4 or something else that
- * can fetch headers separately from bodies,
- * it's time to request the body now. This
- * fetch may be skipped if we got an anti-spam
- * or other PS_REFUSED error response during
- * readheaders.
- */
- if (protocol->fetch_body && !suppress_readbody)
- {
- if (outlevel >= O_VERBOSE && !isafile(1))
- {
- fputc('\n', stdout);
- fflush(stdout);
- }
-
- if ((ok = (protocol->trail)(mailserver_socket, ctl, num)))
- goto cleanUp;
- len = 0;
- if (!suppress_forward)
- {
- if ((ok=(protocol->fetch_body)(mailserver_socket,ctl,num,&len)))
- goto cleanUp;
- /*
- * Work around a bug in Novell's
- * broken GroupWise IMAP server;
- * its body FETCH response is missing
- * the required length for the data
- * string. This violates RFC2060.
- */
- if (len == -1)
- len = msgsizes[num-1] - msglen;
- if (outlevel > O_SILENT && !wholesize)
- report_complete(stdout,
- _(" (%d body octets) "), len);
- }
- }
-
- /* process the body now */
- if (len > 0)
- {
- if (suppress_readbody)
- {
- /* When readheaders returns PS_TRUNCATED,
- the body (which has no content
- has already been read by readheaders,
- so we say readbody returned PS_SUCCESS */
- ok = PS_SUCCESS;
- }
- else
- {
- ok = readbody(mailserver_socket,
- ctl,
- !suppress_forward,
- len);
- }
- if (ok == PS_TRANSIENT)
- suppress_delete = suppress_forward = TRUE;
- else if (ok)
- goto cleanUp;
-
- /* tell server we got it OK and resynchronize */
- if (protocol->trail)
- {
- if (outlevel >= O_VERBOSE && !isafile(1))
- {
- fputc('\n', stdout);
- fflush(stdout);
- }
-
- ok = (protocol->trail)(mailserver_socket, ctl, num);
- if (ok != 0)
- goto cleanUp;
- }
- }
-
- /* count # messages forwarded on this pass */
- if (!suppress_forward)
- dispatches++;
-
- /*
- * Check to see if the numbers matched?
- *
- * Yes, some servers foo this up horribly.
- * All IMAP servers seem to get it right, and
- * so does Eudora QPOP at least in 2.xx
- * versions.
- *
- * Microsoft Exchange gets it completely
- * wrong, reporting compressed rather than
- * actual sizes (so the actual length of
- * message is longer than the reported size).
- * Another fine example of Microsoft brain death!
- *
- * Some older POP servers, like the old UCB
- * POP server and the pre-QPOP QUALCOMM
- * versions, report a longer size in the LIST
- * response than actually gets shipped up.
- * It's unclear what is going on here, as the
- * QUALCOMM server (at least) seems to be
- * reporting the on-disk size correctly.
- */
- if (msgsizes && msglen != msgsizes[num-1])
- {
- if (outlevel >= O_DEBUG)
- report(stdout,
- _("message %d was not the expected length (%d actual != %d expected)\n"),
- num, msglen, msgsizes[num-1]);
- }
-
- /* end-of-message processing starts here */
- if (!close_sink(ctl, &msgblk, !suppress_forward))
- {
- ctl->errcount++;
- suppress_delete = TRUE;
- }
- fetches++;
- }
-
- /*
- * At this point in flow of control, either
- * we've bombed on a protocol error or had
- * delivery refused by the SMTP server
- * (unlikely -- I've never seen it) or we've
- * seen `accepted for delivery' and the
- * message is shipped. It's safe to mark the
- * message seen and delete it on the server
- * now.
- */
-
- /* tell the UID code we've seen this */
- if (ctl->newsaved)
- {
- struct idlist *sdp;
-
- for (sdp = ctl->newsaved; sdp; sdp = sdp->next)
- if ((sdp->val.status.num == num)
- && (!toolarge || oldmsg))
- sdp->val.status.mark = UID_SEEN;
- }
- /* maybe we delete this message now? */
- if (retained)
- {
- if (outlevel > O_SILENT)
- report(stdout, _(" retained\n"));
- }
- else if (protocol->delete
- && !suppress_delete
- && (fetch_it ? !ctl->keep : ctl->flush))
- {
- deletions++;
- if (outlevel > O_SILENT)
- report_complete(stdout, _(" flushed\n"));
- ok = (protocol->delete)(mailserver_socket, ctl, num);
- if (ok != 0)
- goto cleanUp;
-#ifdef POP3_ENABLE
- delete_str(&ctl->newsaved, num);
-#endif /* POP3_ENABLE */
- }
- else if (outlevel > O_SILENT)
- report_complete(stdout, _(" not flushed\n"));
+ /* fetch in lockstep mode */
+ err = fetch_messages(mailserver_socket, ctl,
+ count, &msgsizes,
+ maxfetch,
+ &fetches, &dispatches, &deletions,
+ &transient_errors);
+ if (err != PS_SUCCESS && err != PS_MAXFETCH)
+ goto cleanUp;
- /* perhaps this as many as we're ready to handle */
- if (maxfetch && maxfetch <= fetches && fetches < count)
+ if (transient_errors > MAX_TRANSIENT_ERRORS)
+ {
+ if (outlevel > O_SILENT)
{
- report(stdout, _("fetchlimit %d reached; %d messages left on server\n"),
- maxfetch, count - fetches);
- ok = PS_MAXFETCH;
- goto cleanUp;
+ report(stderr, GT_("Too many mails skipped (%d > %d) due to transient errors for %s\n"),
+ transient_errors, MAX_TRANSIENT_ERRORS, buf);
}
}
send_size_warnings(ctl);
}
}
+
+ /* end-of-mailbox processing before we repoll or switch to another one */
+ if (ctl->server.base_protocol->end_mailbox_poll)
+ {
+ tmperr = (ctl->server.base_protocol->end_mailbox_poll)(mailserver_socket, ctl);
+ if (tmperr) {
+ err = tmperr;
+ goto cleanUp;
+ }
+ }
+ /* Return now if we have reached the fetchlimit */
+ if (maxfetch && maxfetch <= fetches)
+ goto no_error;
} while
/*
- * Only re-poll if we either had some actual forwards and
- * either allowed deletions and had no errors.
+ * Only repoll if we either had some actual forwards
+ * or are idling for new mails and had no errors.
* Otherwise it is far too easy to get into infinite loops.
*/
- (dispatches && protocol->retry && !ctl->keep && !ctl->errcount);
+ (ctl->server.base_protocol->retry && (dispatches || ctl->idle) && !ctl->errcount);
}
- /* no_error: */
- /* ordinary termination with no errors -- officially log out */
- ok = (protocol->logout_cmd)(mailserver_socket, ctl);
+ /* XXX: From this point onwards, preserve err unless a new error has occurred */
+
+ no_error:
+ /* PS_SUCCESS, PS_MAXFETCH: ordinary termination with no errors -- officially log out */
+ stage = STAGE_LOGOUT;
+ tmperr = (ctl->server.base_protocol->logout_cmd)(mailserver_socket, ctl);
+ if (tmperr != PS_SUCCESS)
+ err = tmperr;
/*
* Hmmmm...arguably this would be incorrect if we had fetches but
* no dispatches (due to oversized messages, etc.)
*/
- if (ok == 0)
- ok = (fetches > 0) ? PS_SUCCESS : PS_NOMAIL;
- SockClose(mailserver_socket);
+ else if (err == PS_SUCCESS && fetches == 0)
+ err = PS_NOMAIL;
+ /*
+ * Close all SMTP delivery sockets. For optimum performance
+ * we'd like to hold them open til end of run, but (1) this
+ * loses if our poll interval is longer than the MTA's
+ * inactivity timeout, and (2) some MTAs (like smail) don't
+ * deliver after each message, but rather queue up mail and
+ * wait to actually deliver it until the input socket is
+ * closed.
+ *
+ * don't send QUIT for ODMR case because we're acting as a
+ * proxy between the SMTP server and client.
+ */
+ smtp_close(ctl, ctl->server.protocol != P_ODMR);
+ cleanupSockClose(mailserver_socket);
goto closeUp;
cleanUp:
/* we only get here on error */
- if (ok != 0 && ok != PS_SOCKET)
+ if (err != 0 && err != PS_SOCKET && err != PS_REPOLL)
{
stage = STAGE_LOGOUT;
- (protocol->logout_cmd)(mailserver_socket, ctl);
+ (ctl->server.base_protocol->logout_cmd)(mailserver_socket, ctl);
+ }
+
+ /* try to clean up all streams */
+ release_sink(ctl);
+ /*
+ * Sending SMTP QUIT on signal is theoretically nice, but led
+ * to a subtle bug. If fetchmail was terminated by signal
+ * while it was shipping message text, it would hang forever
+ * waiting for a command acknowledge. In theory we could
+ * enable the QUIT only outside of the message send. In
+ * practice, we don't care. All mailservers hang up on a
+ * dropped TCP/IP connection anyway.
+ */
+ smtp_close(ctl, 0);
+ if (mailserver_socket != -1) {
+ cleanupSockClose(mailserver_socket);
+ }
+ /* If there was a connect timeout, the socket should be closed.
+ * mailserver_socket_temp contains the socket to close.
+ */
+ if (mailserver_socket_temp != -1) {
+ cleanupSockClose(mailserver_socket_temp);
+ mailserver_socket_temp = -1;
}
- SockClose(mailserver_socket);
}
- msg = (const char *)NULL; /* sacrifice to -Wall */
- switch (ok)
+ /* no report on PS_AUTHFAIL */
+ msg = NULL;
+ switch (err)
{
case PS_SOCKET:
- msg = _("socket");
- break;
- case PS_AUTHFAIL:
- msg = _("authorization");
+ msg = GT_("socket");
break;
case PS_SYNTAX:
- msg = _("missing or bad RFC822 header");
+ msg = GT_("missing or bad RFC822 header");
break;
case PS_IOERR:
- msg = _("MDA");
+ msg = GT_("MDA");
break;
case PS_ERROR:
- msg = _("client/server synchronization");
+ msg = GT_("client/server synchronization");
break;
case PS_PROTOCOL:
- msg = _("client/server protocol");
+ msg = GT_("client/server protocol");
break;
case PS_LOCKBUSY:
- msg = _("lock busy on server");
+ msg = GT_("lock busy on server");
break;
case PS_SMTP:
- msg = _("SMTP transaction");
+ msg = GT_("SMTP transaction");
break;
case PS_DNS:
- msg = _("DNS lookup");
+ msg = GT_("DNS lookup");
break;
case PS_UNDEFINED:
- report(stderr, _("undefined error\n"));
+ msg = GT_("undefined");
break;
}
- /* no report on PS_MAXFETCH or PS_UNDEFINED */
- if (ok==PS_SOCKET || ok==PS_AUTHFAIL || ok==PS_SYNTAX
- || ok==PS_IOERR || ok==PS_ERROR || ok==PS_PROTOCOL
- || ok==PS_LOCKBUSY || ok==PS_SMTP || ok==PS_DNS)
- report(stderr, _("%s error while fetching from %s\n"), msg, ctl->server.pollname);
+ if (msg) {
+ if (phase == FORWARDING_WAIT || phase == LISTENER_WAIT
+ || err == PS_SMTP)
+ report(stderr, GT_("%s error while fetching from %s@%s and delivering to SMTP host %s\n"),
+ msg, ctl->remotename, ctl->server.pollname,
+ ctl->smtphost ? ctl->smtphost : GT_("unknown"));
+ else
+ report(stderr, GT_("%s error while fetching from %s@%s\n"),
+ msg, ctl->remotename, ctl->server.pollname);
+ }
closeUp:
- /* execute post-initialization command, if any */
- if (ctl->postconnect && (ok = system(ctl->postconnect)))
+ xfree(msgsizes);
+ ctl->folder = NULL;
+
+ /* execute wrapup command, if any */
+ if (ctl->postconnect && (tmperr = system(ctl->postconnect)))
{
- report(stderr, _("post-connection command failed with status %d\n"), ok);
- if (ok == PS_SUCCESS)
- ok = PS_SYNTAX;
+ if (WIFSIGNALED(tmperr))
+ report(stderr, GT_("post-connection command terminated with signal %d\n"), WTERMSIG(tmperr));
+ else
+ report(stderr, GT_("post-connection command failed with status %d\n"), WEXITSTATUS(tmperr));
+ if (err == PS_SUCCESS)
+ err = PS_SYNTAX;
}
- signal(SIGALRM, alrmsave);
- signal(SIGPIPE, pipesave);
- return(ok);
+ set_timeout(0); /* cancel any pending alarm */
+ set_signal_handler(SIGALRM, alrmsave);
+ return(err);
}
-int do_protocol(ctl, proto)
-/* retrieve messages from server using given protocol method table */
-struct query *ctl; /* parsed options with merged-in defaults */
-const struct method *proto; /* protocol method table */
+/** retrieve messages from server using given protocol method table */
+int do_protocol(struct query *ctl /** parsed options with merged-in defaults */,
+ const struct method *proto /** protocol method table */)
{
- int ok;
+ int err;
#ifndef KERBEROS_V4
- if (ctl->server.preauthenticate == A_KERBEROS_V4)
+ if (ctl->server.authenticate == A_KERBEROS_V4)
{
- report(stderr, _("Kerberos V4 support not linked.\n"));
+ report(stderr, GT_("Kerberos V4 support not linked.\n"));
return(PS_ERROR);
}
#endif /* KERBEROS_V4 */
#ifndef KERBEROS_V5
- if (ctl->server.preauthenticate == A_KERBEROS_V5)
+ if (ctl->server.authenticate == A_KERBEROS_V5)
{
- report(stderr, _("Kerberos V5 support not linked.\n"));
+ report(stderr, GT_("Kerberos V5 support not linked.\n"));
return(PS_ERROR);
}
#endif /* KERBEROS_V5 */
/* check for unsupported options */
if (ctl->flush) {
report(stderr,
- _("Option --flush is not supported with %s\n"),
+ GT_("Option --flush is not supported with %s\n"),
proto->name);
return(PS_SYNTAX);
}
else if (ctl->fetchall) {
report(stderr,
- _("Option --all is not supported with %s\n"),
+ GT_("Option --all is not supported with %s\n"),
proto->name);
return(PS_SYNTAX);
}
}
- if (!proto->getsizes && NUM_SPECIFIED(ctl->limit))
+ if (!(proto->getsizes || proto->getpartialsizes)
+ && NUM_SPECIFIED(ctl->limit))
{
report(stderr,
- _("Option --limit is not supported with %s\n"),
+ GT_("Option --limit is not supported with %s\n"),
proto->name);
return(PS_SYNTAX);
}
* If no expunge limit or we do expunges within the driver,
* then just do one session, passing in any fetchlimit.
*/
- if (proto->retry || !NUM_SPECIFIED(ctl->expunge))
+ if ((ctl->keep && !ctl->flush) ||
+ proto->retry || !NUM_SPECIFIED(ctl->expunge))
return(do_session(ctl, proto, NUM_VALUE_OUT(ctl->fetchlimit)));
/*
* There's an expunge limit, and it isn't handled in the driver itself.
int fetchlimit = NUM_VALUE_OUT(ctl->fetchlimit);
do {
- ok = do_session(ctl, proto, expunge);
+ if (fetchlimit > 0 && (expunge == 0 || expunge > fetchlimit - totalcount))
+ expunge = fetchlimit - totalcount;
+ err = do_session(ctl, proto, expunge);
totalcount += expunge;
if (NUM_SPECIFIED(ctl->fetchlimit) && totalcount >= fetchlimit)
break;
- if (ok != PS_LOCKBUSY)
+ if (err != PS_LOCKBUSY)
lockouts = 0;
else if (lockouts >= MAX_LOCKOUTS)
break;
- else /* ok == PS_LOCKBUSY */
+ else /* err == PS_LOCKBUSY */
{
/*
* Allow time for the server lock to release. if we
sleep(3);
}
} while
- (ok == PS_MAXFETCH || ok == PS_LOCKBUSY);
-
- return(ok);
- }
-}
-
-#if defined(HAVE_STDARG_H)
-void gen_send(int sock, const char *fmt, ... )
-#else
-void gen_send(sock, fmt, va_alist)
-int sock; /* socket to which server is connected */
-const char *fmt; /* printf-style format */
-va_dcl
-#endif
-/* assemble command in printf(3) style and send to the server */
-{
- char buf [MSGBUFSIZE+1];
- va_list ap;
-
- if (protocol->tagged)
- (void) sprintf(buf, "%s ", GENSYM);
- else
- buf[0] = '\0';
-
-#if defined(HAVE_STDARG_H)
- va_start(ap, fmt) ;
-#else
- va_start(ap);
-#endif
-#ifdef HAVE_VSNPRINTF
- vsnprintf(buf + strlen(buf), sizeof(buf), fmt, ap);
-#else
- vsprintf(buf + strlen(buf), fmt, ap);
-#endif
- va_end(ap);
-
- strcat(buf, "\r\n");
- SockWrite(sock, buf, strlen(buf));
-
- if (outlevel >= O_MONITOR)
- {
- char *cp;
-
- if (shroud && shroud[0] && (cp = strstr(buf, shroud)))
- {
- char *sp;
-
- sp = cp + strlen(shroud);
- *cp++ = '*';
- while (*sp)
- *cp++ = *sp++;
- *cp = '\0';
- }
- buf[strlen(buf)-2] = '\0';
- report(stdout, "%s> %s\n", protocol->name, buf);
- }
-}
+ (err == PS_MAXFETCH || err == PS_LOCKBUSY);
-int gen_recv(sock, buf, size)
-/* get one line of input from the server */
-int sock; /* socket to which server is connected */
-char *buf; /* buffer to receive input */
-int size; /* length of buffer */
-{
- int oldphase = phase; /* we don't have to be re-entrant */
-
- phase = SERVER_WAIT;
- set_timeout(mytimeout);
- if (SockRead(sock, buf, size) == -1)
- {
- set_timeout(0);
- phase = oldphase;
- return(PS_SOCKET);
- }
- else
- {
- set_timeout(0);
- if (buf[strlen(buf)-1] == '\n')
- buf[strlen(buf)-1] = '\0';
- if (buf[strlen(buf)-1] == '\r')
- buf[strlen(buf)-1] = '\0';
- if (outlevel >= O_MONITOR)
- report(stdout, "%s< %s\n", protocol->name, buf);
- phase = oldphase;
- return(PS_SUCCESS);
+ return(err);
}
}
-#if defined(HAVE_STDARG_H)
-int gen_transact(int sock, const char *fmt, ... )
-#else
-int gen_transact(int sock, fmt, va_alist)
-int sock; /* socket to which server is connected */
-const char *fmt; /* printf-style format */
-va_dcl
-#endif
-/* assemble command in printf(3) style, send to server, accept a response */
-{
- int ok;
- char buf [MSGBUFSIZE+1];
- va_list ap;
- int oldphase = phase; /* we don't have to be re-entrant */
-
- phase = SERVER_WAIT;
-
- if (protocol->tagged)
- (void) sprintf(buf, "%s ", GENSYM);
- else
- buf[0] = '\0';
-
-#if defined(HAVE_STDARG_H)
- va_start(ap, fmt) ;
-#else
- va_start(ap);
-#endif
-#ifdef HAVE_VSNPRINTF
- vsnprintf(buf + strlen(buf), sizeof(buf), fmt, ap);
-#else
- vsprintf(buf + strlen(buf), fmt, ap);
-#endif
- va_end(ap);
-
- strcat(buf, "\r\n");
- SockWrite(sock, buf, strlen(buf));
-
- if (outlevel >= O_MONITOR)
- {
- char *cp;
-
- if (shroud && shroud[0] && (cp = strstr(buf, shroud)))
- {
- char *sp;
-
- sp = cp + strlen(shroud);
- *cp++ = '*';
- while (*sp)
- *cp++ = *sp++;
- *cp = '\0';
- }
- buf[strlen(buf)-1] = '\0';
- report(stdout, "%s> %s\n", protocol->name, buf);
- }
-
- /* we presume this does its own response echoing */
- ok = (protocol->parse_response)(sock, buf);
-
- phase = oldphase;
- return(ok);
-}
/* driver.c ends here */
projects / ~andy / fetchmail / blobdiff