driver.c
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上传日期:2007-01-04
资源大小:727k
文件大小:69k
- /*
- * driver.c -- generic driver for mail fetch method protocols
- *
- * Copyright 1997 by Eric S. Raymond
- * For license terms, see the file COPYING in this directory.
- */
- #include "config.h"
- #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>
- #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_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? */
- 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 mytimeout; /* value of nonreponse timeout */
- static int timeoutcount; /* count consecutive timeouts */
- static int msglen; /* actual message length */
- void set_timeout(int timeleft)
- /* reset the nonresponse-timeout */
- {
- #ifndef __EMX__
- 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);
- #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 %sn"), 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 %sn"),
- 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] = ' ';
- 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 = ' ';
- /* 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 mailservern"), rbuf);
- }
- else
- {
- if (outlevel >= O_DEBUG)
- report(stdout,
- _("line rejected, %s is not an alias of the mailservern"),
- 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 = ' ';
- 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 = ' ';
- 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 foundn"));
- return(NULL);
- }
- else
- {
- if (outlevel >= O_DEBUG) {
- char *lf = rbuf + strlen(rbuf)-1;
- *lf = ' ';
- 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] == ' ')
- 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;
- 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] = ' ';
- olderrs = ctl->errcount;
- /* read message headers */
- msgblk.reallen = reallen;
- msgblk.headers = received_for = 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] = ' ';
- do {
- set_timeout(mytimeout);
- if ((n = SockRead(sock, buf, sizeof(buf)-1)) == -1) {
- set_timeout(0);
- free(line);
- free(msgblk.headers);
- 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++ = ' ';
- }
- }
- /*
- * 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)
- {
- 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.
- *
- * Foil this by suppressing all but one copy of a message with
- * a given Message-ID. Note: This implementation only catches
- * runs of successive identical messages, but that should be
- * good enough.
- *
- * The accept_count test ensures that multiple pieces of identical
- * email, each with a *single* addressee, won't be suppressed.
- */
- if (MULTIDROP(ctl) && accept_count > 1 && !strncasecmp(line, "Message-ID:", 11))
- {
- if (ctl->lastid && !strcasecmp(ctl->lastid, line))
- 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);
- 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;
- }
- /*
- * 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
- {
- int newlen;
- newlen = oldlen + strlen(line);
- msgblk.headers = (char *) realloc(msgblk.headers, newlen + 1);
- if (msgblk.headers == NULL) {
- free(line);
- return(PS_IOERR);
- }
- 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);
- else if (!strncasecmp("Message-Id:", buf, 11))
- {
- if (ctl->server.uidl)
- {
- char id[IDLEN+1];
- buf[IDLEN+12] = 0; /* prevent stack overflow */
- sscanf(buf+12, "%s", id);
- if (!str_find( &ctl->newsaved, num))
- {
- struct idlist *new = save_str(&ctl->newsaved,id,UID_SEEN);
- new->val.status.num = num;
- }
- }
- }
- 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 headersn"));
- }
- /*
- * 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-DAEMONrnTo: %s@%srnSubject: Headerless mail from %s's mailbox on %srn",
- 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 (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 %sn"),
- 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 errorsn"));
- free(msgblk.headers);
- 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);
- 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 = ' ';
- n = stuffline(ctl, msgblk.headers);
- *rcv = c;
- }
- if (!run.invisible && n != -1)
- {
- /* utter any per-message Received information we need here */
- sprintf(buf, "Received: from %srn", 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)rn",
- 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] = ' ';
- strcat(buf, rfc822timestamp());
- strcat(buf, "rn");
- 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.headersn"));
- release_sink(ctl);
- free(msgblk.headers);
- free_str_list(&msgblk.recipients);
- return(PS_IOERR);
- }
- else if ((run.poll_interval == 0 || nodetach) && outlevel >= O_VERBOSE)
- 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"));
- }
- 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, ", ");
- }
- }
- strcat(errmsg, "rn");
- /* ship out the error line */
- stuffline(ctl, errmsg);
- }
- /* issue the delimiter line */
- cp = buf;
- *cp++ = 'r';
- *cp++ = 'n';
- *cp++ = ' ';
- stuffline(ctl, buf);
- free(msgblk.headers);
- free_str_list(&msgblk.recipients);
- return(headers_ok ? PS_SUCCESS : PS_TRUNCATED);
- }
- 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;
- /*
- * 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);
- /* write the message size dots */
- if (linelen > 0)
- {
- sizeticker += linelen;
- while (sizeticker >= SIZETICKER)
- {
- if ((run.poll_interval == 0 || nodetach) && outlevel > O_SILENT)
- {
- fputc('.', stdout);
- fflush(stdout);
- }
- sizeticker -= SIZETICKER;
- }
- }
- len -= linelen;
- /* check for end of message */
- if (protocol->delimited && *inbufp == '.')
- {
- if (inbufp[1] == 'r' && inbufp[2] == 'n' && inbufp[3] == ' ')
- break;
- else if (inbufp[1] == 'n' && inbufp[2] == ' ')
- break;
- else
- msglen--; /* subtract the size of the dot escape */
- }
- msglen += linelen;
- 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) = ' ';
- issoftline = 0;
- }
- }
- /* ship out the text line */
- if (forward && (!issoftline))
- {
- int n;
- inbufp = buf;
- /* guard against very long lines */
- buf[MSGBUFSIZE+1] = 'r';
- buf[MSGBUFSIZE+2] = 'n';
- buf[MSGBUFSIZE+3] = ' ';
- n = stuffline(ctl, buf);
- if (n < 0)
- {
- report(stdout, _("writing message textn"));
- release_sink(ctl);
- return(PS_IOERR);
- }
- else if (outlevel >= O_VERBOSE)
- {
- fputc('*', stdout);
- fflush(stdout);
- }
- }
- }
- return(PS_SUCCESS);
- }
- #ifdef KERBEROS_V4
- int
- kerberos_auth (socket, canonical)
- /* 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 * host_primary;
- KTEXT ticket;
- MSG_DAT msg_data;
- CREDENTIALS cred;
- Key_schedule schedule;
- int rem;
-
- xalloca(ticket, KTEXT, sizeof (KTEXT_ST));
- rem = (krb_sendauth (0L, socket, ticket, "pop",
- canonical,
- ((char *) (krb_realmofhost (canonical))),
- ((unsigned long) 0),
- (&msg_data),
- (&cred),
- (schedule),
- ((struct sockaddr_in *) 0),
- ((struct sockaddr_in *) 0),
- "KPOPV0.1"));
- if (rem != KSUCCESS)
- {
- report(stderr, _("kerberos error %sn"), (krb_get_err_text (rem)));
- return (PS_AUTHFAIL);
- }
- return (0);
- }
- #endif /* KERBEROS_V4 */
- #ifdef KERBEROS_V5
- static int kerberos5_auth(socket, canonical)
- /* authenticate to the server host using Kerberos V5 */
- int socket; /* socket to server host */
- const char *canonical; /* server name */
- {
- krb5_error_code retval;
- krb5_context context;
- krb5_ccache ccdef;
- krb5_principal client = NULL, server = NULL;
- krb5_error *err_ret = NULL;
- 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)) {
- report(stderr, "krb5_cc_default: %sn", error_message(retval));
- return(PS_ERROR);
- }
- if (retval = krb5_cc_get_principal(context, ccdef, &client)) {
- report(stderr, "krb5_cc_get_principal: %sn", error_message(retval));
- return(PS_ERROR);
- }
- if (retval = krb5_sname_to_principal(context, canonical, "pop",
- KRB5_NT_UNKNOWN,
- &server)) {
- report(stderr, "krb5_sname_to_principal: %sn", error_message(retval));
- return(PS_ERROR);
- }
- retval = krb5_sendauth(context, &auth_context, (krb5_pointer) &socket,
- "KPOPV1.0", client, server,
- AP_OPTS_MUTUAL_REQUIRED,
- NULL, /* no data to checksum */
- 0, /* no creds, use ccache instead */
- ccdef,
- &err_ret, 0,
- NULL); /* don't need reply */
- krb5_free_principal(context, server);
- krb5_free_principal(context, client);
- krb5_auth_con_free(context, auth_context);
- 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);
- #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);
- #endif
- krb5_free_error(context, err_ret);
- } else
- report(stderr, "krb5_sendauth: %sn", error_message(retval));
- return(PS_ERROR);
- }
- return 0;
- }
- #endif /* KERBEROS_V5 */
- static void clean_skipped_list(struct idlist **skipped_list)
- /* struct "idlist" contains no "prev" ptr; we must remove unused items first */
- {
- struct idlist *current=NULL, *prev=NULL, *tmp=NULL, *head=NULL;
- prev = current = head = *skipped_list;
- if (!head)
- return;
- do
- {
- /* if item has no reference, remove it */
- if (current && current->val.status.mark == 0)
- {
- if (current == head) /* remove first item (head) */
- {
- head = current->next;
- if (current->id) free(current->id);
- free(current);
- prev = current = head;
- }
- else /* remove middle/last item */
- {
- tmp = current->next;
- prev->next = tmp;
- if (current->id) free(current->id);
- free(current);
- current = tmp;
- }
- }
- 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;
- #define OVERHD "Subject: Fetchmail oversized-messages warning.rnrnThe following oversized messages remain on the mail server %s:"
- 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, (struct msgblk *)NULL))
- return;
- stuff_warning(ctl, OVERHD, ctl->server.pollname);
-
- 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);
- stuff_warning(ctl,
- _("t%d msg %d octets long skipped by fetchmail.n"),
- 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;
- }
- close_warning_by_mail(ctl, (struct msgblk *)NULL);
- #undef OVERHD
- }
- 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 */
- {
- int js;
- #ifdef HAVE_VOLATILE
- volatile int ok, mailserver_socket = -1; /* pacifies -Wall */
- #else
- int ok, mailserver_socket = -1;
- #endif /* HAVE_VOLATILE */
- const char *msg;
- void (*pipesave)(int);
- void (*alrmsave)(int);
- struct idlist *current=NULL, *tmp=NULL;
- protocol = proto;
- ctl->server.base_protocol = protocol;
- pass = 0;
- tagnum = 0;
- tag[0] = ' '; /* nuke any tag hanging out from previous query */
- ok = 0;
- /* set up the server-nonresponse timeout */
- alrmsave = signal(SIGALRM, timeout_handler);
- mytimeout = ctl->server.timeout;
- /* set up the broken-pipe timeout */
- pipesave = signal(SIGPIPE, sigpipe_handler);
- if ((js = setjmp(restart)))
- {
- #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.
- */
- sigset_t allsigs;
- sigfillset(&allsigs);
- sigprocmask(SIG_UNBLOCK, &allsigs, NULL);
- #endif /* HAVE_SIGPROCMASK */
- if (js == THROW_SIGPIPE)
- {
- report(stdout,
- _("SIGPIPE thrown from an MDA or a stream socket error"));
- ok = PS_SOCKET;
- }
- else if (js == THROW_TIMEOUT)
- {
- if (phase == OPEN_WAIT)
- report(stdout,
- _("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"),
- ctl->server.timeout, ctl->server.pollname);
- else if (phase == FORWARDING_WAIT)
- report(stdout,
- _("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"));
- else
- report(stdout,
- _("timeout after %d seconds.n"), ctl->server.timeout);
- /*
- * If we've exceeded our threshold for consecutive timeouts,
- * try to notify the user, then mark the connection wedged.
- */
- if (timeoutcount > MAX_TIMEOUTS
- && !open_warning_by_mail(ctl, (struct msgblk *)NULL))
- {
- stuff_warning(ctl,
- _("Subject: fetchmail sees repeated timeoutsrn"));
- stuff_warning(ctl,
- _("Fetchmail saw more than %d timeouts while attempting to get mail from %s@%s.rn"),
- MAX_TIMEOUTS,
- ctl->remotename,
- ctl->server.truename);
- stuff_warning(ctl,
- _("This could mean that your mailserver is stuck, or that your SMTPrn"
- "server is wedged, or that your mailbox file on the server has beenrn"
- "corrupted by a server error. You can run `fetchmail -v -v' torn"
- "diagnose the problem.rnrn"
- "Fetchmail won't poll this mailbox again until you restart it.rn"));
- 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);
- }
- else
- {
- char buf[POPBUFSIZE+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 */
- struct idlist *idp;
- /* execute pre-initialization command, if any */
- if (ctl->preconnect && (ok = system(ctl->preconnect)))
- {
- report(stderr,
- _("pre-connection command failed with status %dn"), ok);
- ok = PS_SYNTAX;
- goto closeUp;
- }
- /* open a socket to the mail server */
- 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;
- #endif
- #endif /* !INET6_ENABLE */
- 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 : 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 */
- {
- 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 inconsistencyn"));
- #endif
- /*
- * Avoid generating a bogus error every poll cycle when we're
- * in daemon mode but the connection to the outside world
- * is down.
- */
- if (!(err_no == EHOSTUNREACH && 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."));
- else if (h_errno == NO_ADDRESS)
- strcpy(errbuf, _("name is valid but has no IP address."));
- 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_complete(stderr, ": %sn", 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)
- {
- #define OPENFAIL "Subject: Fetchmail unreachable-server warning.rnrnFetchmail could not reach the mail server %s:"
- stuff_warning(ctl, OPENFAIL, ctl->server.pollname);
- stuff_warning(ctl, errbuf, ctl->server.pollname);
- close_warning_by_mail(ctl, (struct msgblk *)NULL);
- #undef OPENFAIL
- }
- #endif
- }
- #endif /* INET6_ENABLE */
- ok = PS_SOCKET;
- set_timeout(0);
- phase = oldphase;
- goto closeUp;
- }
- set_timeout(0);
- phase = oldphase;
- #ifdef SSL_ENABLE
- /* 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)
- {
- report(stderr, "SSL connection failed.");
- goto closeUp;
- }
- #endif
- #ifdef KERBEROS_V4
- if (ctl->server.preauthenticate == A_KERBEROS_V4)
- {
- set_timeout(mytimeout);
- ok = kerberos_auth(mailserver_socket, ctl->server.truename);
- set_timeout(0);
- if (ok != 0)
- goto cleanUp;
- }
- #endif /* KERBEROS_V4 */
- #ifdef KERBEROS_V5
- if (ctl->server.preauthenticate == A_KERBEROS_V5)
- {
- set_timeout(mytimeout);
- ok = kerberos5_auth(mailserver_socket, ctl->server.truename);
- set_timeout(0);
- if (ok != 0)
- goto cleanUp;
- }
- #endif /* KERBEROS_V5 */
- /* accept greeting message from mail server */
- ok = (protocol->parse_response)(mailserver_socket, buf);
- if (ok != 0)
- goto cleanUp;
- /* try to get authorized to fetch mail */
- stage = STAGE_GETAUTH;
- if (protocol->getauth)
- {
- if (protocol->password_canonify)
- (protocol->password_canonify)(shroud, ctl->password, PASSWORDLEN);
- else
- strcpy(shroud, ctl->password);
- ok = (protocol->getauth)(mailserver_socket, ctl, buf);
- if (ok != 0)
- {
- if (ok == PS_LOCKBUSY)
- report(stderr, _("Lock-busy error on %s@%sn"),
- ctl->remotename,
- ctl->server.truename);
- else if (ok == PS_AUTHFAIL)
- {
- report(stderr, _("Authorization failure on %s@%sn"),
- ctl->remotename,
- ctl->server.truename);
- /*
- * 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.
- */
- if (run.poll_interval
- && ctl->authfailcount++ > MAX_AUTHFAILS
- && !open_warning_by_mail(ctl, (struct msgblk *)NULL))
- {
- stuff_warning(ctl,
- _("Subject: fetchmail authentication failedrn"));
- stuff_warning(ctl,
- _("Fetchmail could not get mail from %s@%s.rn"),
- ctl->remotename,
- ctl->server.truename);
- stuff_warning(ctl,
- _("The attempt to get authorization failed.rn"
- "This probably means your password is invalid, but POP3 servers havern"
- "other failure modes that fetchmail cannot distinguish from thisrn"
- "because they don't send useful error messages on login failure.rn"));
- close_warning_by_mail(ctl, (struct msgblk *)NULL);
- ctl->wedged = TRUE;
- }
- }
- else
- report(stderr, _("Unknown login or authentication error on %s@%sn"),
- ctl->remotename,
- ctl->server.truename);
-
- goto cleanUp;
- }
- }
- ctl->errcount = fetches = 0;
- /* now iterate over each folder selected */
- for (idp = ctl->mailboxes; idp; idp = idp->next)
- {
- pass = 0;
- do {
- dispatches = 0;
- ++pass;
- if (outlevel >= O_DEBUG)
- {
- if (idp->id)
- report(stdout, _("selecting or re-polling folder %sn"), idp->id);
- else
- report(stdout, _("selecting or re-polling default foldern"));
- }
- /* 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)
- 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);
- else
- (void) sprintf(buf, _("%s at %s"),
- ctl->remotename, ctl->server.truename);
- if (outlevel > O_SILENT)
- {
- if (count == -1) /* only used for ETRN */
- report(stdout, _("Polling %sn"), 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);
- else
- report_build(stdout, _("%d %s for %s"),
- count, count > 1 ? _("messages") :
- _("message"), buf);
- if (bytes == -1)
- report_complete(stdout, ".n");
- else
- report_complete(stdout, _(" (%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 %sn"), buf);
- }
- }
- /* very important, this is where we leave the do loop */
- if (count == 0)
- break;
- if (check_only)
- {
- if (new == -1 || ctl->fetchall)
- new = count;
- fetches = new; /* set error status ccorrectly */
- goto no_error;
- }
- else if (count > 0)
- {
- flag force_retrieval;
- /*
- * 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);
- /*
- * We need the size of each message before it's
- * loaded in order to pass it to the ESMTP SIZE
- * option. If the protocol has a getsizes method,
- * we presume this means it doesn't get reliable
- * sizes from message fetch responses.
- */
- if (proto->getsizes)
- {
- int i;
- xalloca(msgsizes, int *, sizeof(int) * count);
- for (i = 0; i < count; i++)
- msgsizes[i] = -1;
- stage = STAGE_GETSIZES;
- ok = (proto->getsizes)(mailserver_socket, count, msgsizes);
- if (ok != 0)
- goto cleanUp;
- if (bytes == -1)
- {
- bytes = 0;
- for (i = 0; i < count; i++)
- bytes += msgsizes[i];
- }
- }
- /* 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 -1n"),
- 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"), num);
- 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)
- {
- 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)
- {
- 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)
- sdp->val.status.mark = UID_SEEN;
- }
- /* maybe we delete this message now? */
- if (retained)
- {
- if (outlevel > O_SILENT)
- report(stdout, _(" retainedn"));
- }
- else if (protocol->delete
- && !suppress_delete
- && (fetch_it ? !ctl->keep : ctl->flush))
- {
- deletions++;
- if (outlevel > O_SILENT)
- report_complete(stdout, _(" flushedn"));
- 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 flushedn"));
- /* perhaps this as many as we're ready to handle */
- if (maxfetch && maxfetch <= fetches && fetches < count)
- {
- report(stdout, _("fetchlimit %d reached; %d messages left on servern"),
- maxfetch, count - fetches);
- ok = PS_MAXFETCH;
- goto cleanUp;
- }
- }
- if (!check_only && ctl->skipped
- && run.poll_interval > 0 && !nodetach)
- {
- clean_skipped_list(&ctl->skipped);
- send_size_warnings(ctl);
- }
- }
- } while
- /*
- * Only re-poll if we had some actual forwards, allowed
- * deletions and had no errors.
- * Otherwise it is far too easy to get into infinite loops.
- */
- (dispatches && protocol->retry && !ctl->keep && !ctl->errcount);
- }
- no_error:
- /* ordinary termination with no errors -- officially log out */
- ok = (protocol->logout_cmd)(mailserver_socket, ctl);
- /*
- * 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);
- goto closeUp;
- cleanUp:
- /* we only get here on error */
- if (ok != 0 && ok != PS_SOCKET)
- {
- stage = STAGE_LOGOUT;
- (protocol->logout_cmd)(mailserver_socket, ctl);
- }
- SockClose(mailserver_socket);
- }
- msg = (const char *)NULL; /* sacrifice to -Wall */
- switch (ok)
- {
- case PS_SOCKET:
- msg = _("socket");
- break;
- case PS_AUTHFAIL:
- msg = _("authorization");
- break;
- case PS_SYNTAX:
- msg = _("missing or bad RFC822 header");
- break;
- case PS_IOERR:
- msg = _("MDA");
- break;
- case PS_ERROR:
- msg = _("client/server synchronization");
- break;
- case PS_PROTOCOL:
- msg = _("client/server protocol");
- break;
- case PS_LOCKBUSY:
- msg = _("lock busy on server");
- break;
- case PS_SMTP:
- msg = _("SMTP transaction");
- break;
- case PS_DNS:
- msg = _("DNS lookup");
- break;
- case PS_UNDEFINED:
- report(stderr, _("undefined errorn"));
- 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 %sn"), msg, ctl->server.pollname);
- closeUp:
- /* execute post-initialization command, if any */
- if (ctl->postconnect && (ok = system(ctl->postconnect)))
- {
- report(stderr, _("post-connection command failed with status %dn"), ok);
- if (ok == PS_SUCCESS)
- ok = PS_SYNTAX;
- }
- signal(SIGALRM, alrmsave);
- signal(SIGPIPE, pipesave);
- return(ok);
- }
- 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 */
- {
- int ok;
- #ifndef KERBEROS_V4
- if (ctl->server.preauthenticate == A_KERBEROS_V4)
- {
- report(stderr, _("Kerberos V4 support not linked.n"));
- return(PS_ERROR);
- }
- #endif /* KERBEROS_V4 */
- #ifndef KERBEROS_V5
- if (ctl->server.preauthenticate == A_KERBEROS_V5)
- {
- report(stderr, _("Kerberos V5 support not linked.n"));
- return(PS_ERROR);
- }
- #endif /* KERBEROS_V5 */
- /* lacking methods, there are some options that may fail */
- if (!proto->is_old)
- {
- /* check for unsupported options */
- if (ctl->flush) {
- report(stderr,
- _("Option --flush is not supported with %sn"),
- proto->name);
- return(PS_SYNTAX);
- }
- else if (ctl->fetchall) {
- report(stderr,
- _("Option --all is not supported with %sn"),
- proto->name);
- return(PS_SYNTAX);
- }
- }
- if (!proto->getsizes && NUM_SPECIFIED(ctl->limit))
- {
- report(stderr,
- _("Option --limit is not supported with %sn"),
- 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))
- return(do_session(ctl, proto, NUM_VALUE_OUT(ctl->fetchlimit)));
- /*
- * There's an expunge limit, and it isn't handled in the driver itself.
- * OK; do multiple sessions, each fetching a limited # of messages.
- * Stop if the total count of retrieved messages exceeds ctl->fetchlimit
- * (if it was nonzero).
- */
- else
- {
- int totalcount = 0;
- int lockouts = 0;
- int expunge = NUM_VALUE_OUT(ctl->expunge);
- int fetchlimit = NUM_VALUE_OUT(ctl->fetchlimit);
- do {
- ok = do_session(ctl, proto, expunge);
- totalcount += expunge;
- if (NUM_SPECIFIED(ctl->fetchlimit) && totalcount >= fetchlimit)
- break;
- if (ok != PS_LOCKBUSY)
- lockouts = 0;
- else if (lockouts >= MAX_LOCKOUTS)
- break;
- else /* ok == PS_LOCKBUSY */
- {
- /*
- * Allow time for the server lock to release. if we
- * don't do this, we'll often hit a locked-mailbox
- * condition and fail.
- */
- lockouts++;
- 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] = ' ';
- #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, "rn");
- 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 = ' ';
- }
- buf[strlen(buf)-2] = ' ';
- report(stdout, "%s> %sn", protocol->name, buf);
- }
- }
- 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] = ' ';
- if (buf[strlen(buf)-1] == 'r')
- buf[strlen(buf)-1] = ' ';
- if (outlevel >= O_MONITOR)
- report(stdout, "%s< %sn", protocol->name, buf);
- phase = oldphase;
- return(PS_SUCCESS);
- }
- }
- #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] = ' ';
- #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, "rn");
- 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 = ' ';
- }
- buf[strlen(buf)-1] = ' ';
- report(stdout, "%s> %sn", 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 */