/*
* 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>
#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_ALLOCA_H)
#include <alloca.h>
#endif
#if defined(HAVE_SYS_ITIMER_H)
#include <sys/itimer.h>
#endif
#include <sys/time.h>
#include <signal.h>
#ifdef HAVE_GETHOSTBYNAME
#include <netdb.h>
#include "mx.h"
#endif /* HAVE_GETHOSTBYNAME */
#ifdef SUNOS
#include <memory.h>
#endif
#ifdef KERBEROS_V4
#include <krb.h>
#include <des.h>
#include <netinet/in.h>
#include <netdb.h>
#endif /* KERBEROS_V4 */
#include "fetchmail.h"
#include "socket.h"
#include "smtp.h"
/* BSD portability hack...I know, this is an ugly place to put it */
#if !defined(SIGCHLD) && defined(SIGCLD)
#define SIGCHLD SIGCLD
#endif
#define SMTP_PORT 25 /* standard SMTP service port */
extern char *strstr(); /* needed on sysV68 R3V7.1. */
int fetchlimit; /* how often to tear down the server connection */
int batchcount; /* count of messages sent in current batch */
bool peek_capable; /* can we peek for better error recovery? */
static const struct method *protocol;
static jmp_buf restart;
char tag[TAGLEN];
static int tagnum;
#define GENSYM (sprintf(tag, "a%04d", ++tagnum), tag)
static char *shroud; /* string to shroud in debug output, if non-NULL */
static int mytimeout; /* value of nonreponse timeout */
static void set_timeout(int timeleft)
/* reset the nonresponse-timeout */
{
struct itimerval ntimeout;
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);
}
static void timeout_handler (int signal)
/* handle server-timeout SIGALRM signal */
{
longjmp(restart, 1);
}
#define XMIT_ACCEPT 1
#define XMIT_REJECT 2
#define XMIT_ANTISPAM 3
static int accept_count, reject_count;
#ifdef HAVE_RES_SEARCH
#define MX_RETRIES 3
static int is_host_alias(const char *name, struct query *ctl)
/* determine whether name is a DNS alias of the hostname */
{
struct hostent *he;
struct mxentry *mxp, *mxrecords;
/*
* The first two checks are optimizations that will catch a good
* many cases. (1) check against the hostname the user
* specified. Odds are good this will either be the mailserver's
* FQDN or a suffix of it with the mailserver's domain's default
* host name omitted. Then check the rest of the `also known as'
* cache accumulated by previous DNS checks. This cache is primed
* by the aka list option.
*
* (2) check against the mailserver's FQDN, in case
* it's not the same as the declared hostname.
*
* Either of these on a mail address is definitive. Only if the
* name doesn't match either is it time to call the bind library.
* If this happens odds are good we're looking at an MX name.
*/
if (str_in_list(&ctl->server.lead_server->names, name))
return(TRUE);
else if (strcmp(name, ctl->server.canonical_name) == 0)
return(TRUE);
else if (!ctl->server.dns)
return(FALSE);
/*
* We know DNS service was up at the beginning of this poll cycle.
* If it's down, our nameserver has crashed. We don't want to try
* delivering the current message or anything else from this
* mailbox until it's back up.
*/
else if ((he = gethostbyname(name)) != (struct hostent *)NULL)
{
if (strcmp(ctl->server.canonical_name, he->h_name) == 0)
goto match;
else
return(FALSE);
}
else
switch (h_errno)
{
case HOST_NOT_FOUND: /* specified host is unknown */
case NO_ADDRESS: /* valid, but does not have an IP address */
break;
case NO_RECOVERY: /* non-recoverable name server error */
case TRY_AGAIN: /* temporary error on authoritative server */
default:
if (outlevel != O_SILENT)
putchar('\n'); /* terminate the progress message */
error(0, 0,
"nameserver failure while looking for `%s' during poll of %s.",
name, ctl->server.names->id);
ctl->errcount++;
break;
}
/*
* We're only here if DNS was OK but the gethostbyname() failed
* with a HOST_NOT_FOUND or NO_ADDRESS error.
* Search for a name match on MX records pointing to the server.
*/
h_errno = 0;
if ((mxrecords = getmxrecords(name)) == (struct mxentry *)NULL)
{
switch (h_errno)
{
case HOST_NOT_FOUND: /* specified host is unknown */
case NO_ADDRESS: /* valid, but does not have an IP address */
return(FALSE);
break;
case NO_RECOVERY: /* non-recoverable name server error */
case TRY_AGAIN: /* temporary error on authoritative server */
default:
error(0, 0,
"nameserver failure while looking for `%s' during poll of %s.",
name, ctl->server.names->id);
ctl->errcount++;
break;
}
}
else
{
for (mxp = mxrecords; mxp->name; mxp++)
if (strcmp(ctl->server.canonical_name, mxp->name) == 0)
goto match;
return(FALSE);
match:;
}
/* add this name to relevant server's `also known as' list */
save_str(&ctl->server.lead_server->names, -1, name);
return(TRUE);
}
static void map_name(name, ctl, xmit_names)
/* add given name to xmit_names if it matches declared localnames */
const char *name; /* name to map */
struct query *ctl; /* list of permissible aliases */
struct idlist **xmit_names; /* list of recipient names parsed out */
{
const char *lname;
lname = idpair_find(&ctl->localnames, name);
if (!lname && ctl->wildcard)
lname = name;
if (lname != (char *)NULL)
{
if (outlevel == O_VERBOSE)
error(0, 0, "mapped %s to local %s", name, lname);
save_str(xmit_names, XMIT_ACCEPT, lname);
accept_count++;
}
}
void find_server_names(hdr, ctl, xmit_names)
/* parse names out of a RFC822 header into an ID list */
const char *hdr; /* RFC822 header in question */
struct query *ctl; /* list of permissible aliases */
struct idlist **xmit_names; /* list of recipient names parsed out */
{
if (hdr == (char *)NULL)
return;
else
{
char *cp;
if ((cp = nxtaddr(hdr)) != (char *)NULL)
do {
char *atsign;
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[-1] == '.' || rhs[-1] == '@')
&& strcasecmp(rhs, idp->id) == 0)
{
if (outlevel == O_VERBOSE)
error(0, 0, "passed through %s matching %s",
cp, idp->id);
save_str(xmit_names, XMIT_ACCEPT, cp);
accept_count++;
continue;
}
}
/*
* 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, XMIT_REJECT, cp);
reject_count++;
continue;
}
atsign[0] = '\0';
}
map_name(cp, ctl, xmit_names);
} while
((cp = nxtaddr((char *)NULL)) != (char *)NULL);
}
}
char *parse_received(struct query *ctl, char *bufp)
/* try to extract real addressee from the Received line */
{
char *ok;
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 ((ok = strstr(bufp, "by ")) == (char *)NULL)
ok = (char *)NULL;
else
{
char *sp, *tp;
/* extract space-delimited token after "by " */
for (sp = ok + 3; isspace(*sp); sp++)
continue;
tp = rbuf;
for (; !isspace(*sp); sp++)
*tp++ = *sp;
*tp = '\0';
/*
* 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))
ok = strstr(sp, "for ");
else
ok = (char *)NULL;
}
if (ok != 0)
{
char *sp, *tp;
tp = rbuf;
sp = ok + 4;
if (*sp == '<')
sp++;
while (*sp && *sp != '>' && *sp != '@' && *sp != ';')
if (!isspace(*sp))
*tp++ = *sp++;
else
{
/* uh oh -- whitespace here can't be right! */
ok = (char *)NULL;
break;
}
*tp = '\0';
}
if (!ok)
return(NULL);
else
{
if (outlevel == O_VERBOSE)
error(0, 0, "found Received address `%s'", rbuf);
return(rbuf);
}
}
#endif /* HAVE_RES_SEARCH */
int smtp_open(struct query *ctl)
/* try to open a socket to the appropriate SMTP server for this query */
{
struct idlist *idp;
/* maybe it's time to close the socket in order to force delivery */
if (ctl->batchlimit > 0 && (ctl->smtp_socket != -1) && batchcount++ == ctl->batchlimit)
{
close(ctl->smtp_socket);
ctl->smtp_socket = -1;
batchcount = 0;
}
/* run down the SMTP hunt list looking for a server that's up */
for (idp = ctl->smtphunt; idp; idp = idp->next)
{
/*
* RFC 1123 requires that the domain name in HELO address is a
* "valid principal domain name" for the client host. We
* violate this with malice aforethought in order to make the
* Received headers and logging look right.
*
* In fact this code relies on the RFC1123 requirement that the
* SMTP listener must accept messages even if verification of the
* HELO name fails (RFC1123 section 5.2.5, paragraph 2).
*/
/* if no socket to this host is already set up, try to open ESMTP */
if (ctl->smtp_socket == -1)
{
if ((ctl->smtp_socket = SockOpen(idp->id,SMTP_PORT)) == -1)
continue;
else if (SMTP_ok(ctl->smtp_socket) != SM_OK
|| SMTP_ehlo(ctl->smtp_socket,
ctl->server.names->id,
&ctl->server.esmtp_options) != SM_OK)
{
/*
* RFC 1869 warns that some listeners hang up on a failed EHLO,
* so it's safest not to assume the socket will still be good.
*/
close(ctl->smtp_socket);
ctl->smtp_socket = -1;
}
else
{
ctl->smtphost = idp->id;
break;
}
}
/* if opening for ESMTP failed, try SMTP */
if (ctl->smtp_socket == -1)
{
if ((ctl->smtp_socket = SockOpen(idp->id,SMTP_PORT)) == -1)
continue;
else if (SMTP_ok(ctl->smtp_socket) != SM_OK
|| SMTP_helo(ctl->smtp_socket, ctl->server.names->id) != SM_OK)
{
close(ctl->smtp_socket);
ctl->smtp_socket = -1;
}
else
{
ctl->smtphost = idp->id;
break;
}
}
}
return(ctl->smtp_socket);
}
/* these are shared by readheaders and readbody */
static FILE *sinkfp;
static RETSIGTYPE (*sigchld)();
static int sizeticker;
static int readheaders(sock, len, ctl, realname)
/* read message headers and ship to SMTP or MDA */
int sock; /* to which the server is connected */
long len; /* length of message */
struct query *ctl; /* query control record */
char *realname; /* real name of host */
{
char buf[MSGBUFSIZE+1], return_path[MSGBUFSIZE+1];
int from_offs, ctt_offs, env_offs, addressoffs[128], next_address;
char *headers, *received_for;
int n, linelen, oldlen, ch, remaining;
char *cp;
struct idlist *idp, *xmit_names;
bool good_addresses, bad_addresses, has_nuls;
#ifdef HAVE_RES_SEARCH
bool no_local_matches = FALSE;
#endif /* HAVE_RES_SEARCH */
int olderrs;
next_address = sizeticker = 0;
has_nuls = FALSE;
return_path[0] = '\0';
olderrs = ctl->errcount;
/* read message headers */
headers = received_for = NULL;
from_offs = ctt_offs = env_offs = -1;
oldlen = 0;
for (remaining = len; remaining > 0; remaining -= linelen)
{
char *line;
line = xmalloc(sizeof(buf));
linelen = 0;
line[0] = '\0';
do {
if ((n = SockRead(sock, buf, sizeof(buf)-1)) == -1)
return(PS_SOCKET);
linelen += 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';
}
}
set_timeout(ctl->server.timeout);
/* leave extra room for reply_hack to play with */
line = (char *) realloc(line, strlen(line) + strlen(buf) + HOSTLEN + 1);
strcat(line, buf);
if (line[0] == '\r' && line[1] == '\n')
break;
} while
/* we may need to grab RFC822 continuations */
((ch = SockPeek(sock)) == ' ' || ch == '\t');
/* write the message size dots */
if ((outlevel > O_SILENT && outlevel < O_VERBOSE) && linelen > 0)
{
sizeticker += linelen;
while (sizeticker >= SIZETICKER)
{
error_build(".");
sizeticker -= SIZETICKER;
}
}
if (linelen != strlen(line))
has_nuls = TRUE;
/* check for end of headers; don't save terminating line */
if (line[0] == '\r' && line[1] == '\n')
{
free(line);
break;
}
/*
* This code prevents fetchmail from becoming an accessory after
* the fact to upstream sendmails with the `E' option on. This
* can result in an escaped Unix From_ 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 From_ line in headers. These aren't RFC822
* so our conscience is clear...
*/
if (!strncasecmp(line, ">From ", 6))
{
free(line);
continue;
}
/*
* 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 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.
*/
if (!ctl->mda && !strncasecmp("Return-Path:", line, 12))
{
strcpy(return_path, nxtaddr(line));
free(line);
continue;
}
if (ctl->rewrite)
reply_hack(line, realname);
if (!headers)
{
oldlen = strlen(line);
headers = xmalloc(oldlen + 1);
(void) strcpy(headers, line);
free(line);
line = headers;
}
else
{
int newlen;
newlen = oldlen + strlen(line);
headers = (char *) realloc(headers, newlen + 1);
if (headers == NULL)
return(PS_IOERR);
strcpy(headers + oldlen, line);
free(line);
line = headers + oldlen;
oldlen = newlen;
}
if (from_offs == -1 && !strncasecmp("From:", line, 5))
from_offs = (line - headers);
else if (from_offs == -1 && !strncasecmp("Resent-From:", line, 12))
from_offs = (line - headers);
else if (from_offs == -1 && !strncasecmp("Apparently-From:", line, 16))
from_offs = (line - headers);
else if (ctl->server.envelope != STRING_DISABLED && env_offs == -1
&& !strncasecmp(ctl->server.envelope,
line,
strlen(ctl->server.envelope)))
env_offs = (line - headers);
else if (!strncasecmp("To:", line, 3))
{
if (next_address >= sizeof(addressoffs)/sizeof(addressoffs[0]))
error(PS_UNDEFINED, errno, "too many destination headers");
addressoffs[next_address++] = (line - headers);
}
else if (!strncasecmp("Cc:", line, 3))
{
if (next_address >= sizeof(addressoffs)/sizeof(addressoffs[0]))
error(PS_UNDEFINED, errno, "too many destination headers");
addressoffs[next_address++] = (line - headers);
}
else if (!strncasecmp("Bcc:", line, 4))
{
if (next_address >= sizeof(addressoffs)/sizeof(addressoffs[0]))
error(PS_UNDEFINED, errno, "too many destination headers");
addressoffs[next_address++] = (line - headers);
}
else if (!strncasecmp("Content-Transfer-Encoding:", line, 26))
ctt_offs = (line - headers);
#ifdef HAVE_RES_SEARCH
else if (MULTIDROP(ctl) && !received_for && !strncasecmp("Received:", line, 9))
received_for = parse_received(ctl, line);
#endif /* HAVE_RES_SEARCH */
}
/*
* 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 (headers == (char *)NULL)
{
sprintf(buf,
"From: <FETCHMAIL-DAEMON@%s>\r\nTo: %s@localhost\r\nSubject: Headerless mail from %s's mailbox on %s\r\n",
fetchmailhost, user, ctl->remotename, realname);
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.
*/
/* cons up a list of local recipients */
xmit_names = (struct idlist *)NULL;
bad_addresses = good_addresses = accept_count = reject_count = 0;
#ifdef HAVE_RES_SEARCH
/* is this a multidrop box? */
if (MULTIDROP(ctl))
{
if (env_offs > -1) /* We have the actual envelope addressee */
find_server_names(headers + env_offs, ctl, &xmit_names);
else if (received_for)
/*
* We have the Received for addressee.
* It has to be a mailserver address, or we
* wouldn't have got here.
*/
map_name(received_for, ctl, &xmit_names);
else
{
int i;
/*
* We haven't extracted the envelope address.
* So check all the header addresses.
*/
for (i = 0; i < next_address; i++)
find_server_names(headers + addressoffs[i], ctl, &xmit_names);
}
if (!accept_count)
{
no_local_matches = TRUE;
save_str(&xmit_names, XMIT_ACCEPT, user);
if (outlevel == O_VERBOSE)
error(0, 0,
"no local matches, forwarding to %s",
user);
}
}
else /* it's a single-drop box, use first localname */
#endif /* HAVE_RES_SEARCH */
save_str(&xmit_names, XMIT_ACCEPT, ctl->localnames->id);
/*
* 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_VERBOSE)
error(0,0, "forwarding and deletion suppressed due to DNS errors");
free(headers);
return(PS_TRANSIENT);
}
else if (ctl->mda) /* we have a declared MDA */
{
int length = 0;
char *names, *cmd;
/*
* We go through this in order to be able to handle very
* long lists of users and (re)implement %s.
*/
for (idp = xmit_names; idp; idp = idp->next)
if (idp->val.num == XMIT_ACCEPT)
length += (strlen(idp->id) + 1);
names = (char *)alloca(length);
names[0] = '\0';
for (idp = xmit_names; idp; idp = idp->next)
if (idp->val.num == XMIT_ACCEPT)
{
strcat(names, idp->id);
strcat(names, " ");
}
cmd = (char *)alloca(strlen(ctl->mda) + length);
sprintf(cmd, ctl->mda, names);
if (outlevel == O_VERBOSE)
error(0, 0, "about to deliver with: %s", cmd);
#ifdef HAVE_SETEUID
/*
* Arrange to run with user's permissions if we're root.
* This will initialize the ownership of any files the
* MDA creates properly. (The seteuid call is available
* under all BSDs and Linux)
*/
seteuid(ctl->uid);
#endif /* HAVE_SETEUID */
sinkfp = popen(cmd, "w");
#ifdef HAVE_SETEUID
/* this will fail quietly if we didn't start as root */
seteuid(0);
#endif /* HAVE_SETEUID */
if (!sinkfp)
{
error(0, -1, "MDA open failed");
return(PS_IOERR);
}
sigchld = signal(SIGCHLD, SIG_DFL);
}
else
{
char *ap, *ctt, options[MSGBUFSIZE];
/* build a connection to the SMTP listener */
if ((smtp_open(ctl) == -1))
{
free_str_list(&xmit_names);
error(0, -1, "SMTP connect to %s failed",
ctl->smtphost ? ctl->smtphost : "localhost");
return(PS_SMTP);
}
/*
* Compute ESMTP options. It's a kluge to use nxtaddr()
* here because the contents of the Content-Transfer-Encoding
* headers isn't semantically an address. But it has the
* desired tokenizing effect.
*/
options[0] = '\0';
if (ctl->server.esmtp_options & ESMTP_8BITMIME)
if (ctl->pass8bits)
sprintf(options, " BODY=8BITMIME");
else if ((ctt_offs >= 0) && (ctt = nxtaddr(headers + ctt_offs)))
{
if (!strcasecmp(ctt,"7BIT"))
sprintf(options, " BODY=7BIT");
else if (!strcasecmp(ctt,"8BIT"))
sprintf(options, " BODY=8BITMIME");
}
if ((ctl->server.esmtp_options & ESMTP_SIZE))
sprintf(options + strlen(options), " SIZE=%ld", len);
/*
* 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, take the From address.
*
* Try to get the SMTP listener to take the Return-Path or
* From address as MAIL FROM . If it won't, fall back on the
* calling-user ID. This won't affect replies, which use the
* header From address anyway.
*
* RFC 1123 requires that the domain name part of the
* MAIL FROM address be "canonicalized", that is a
* FQDN or MX but not a CNAME. We'll assume the From
* header is already in this form here (it certainly
* is if rewrite is on). RFC 1123 is silent on whether
* a nonexistent hostname part is considered canonical.
*
* This is a potential problem if the MTAs further upstream
* didn't pass canonicalized From/Return-Path lines, *and* the
* local SMTP listener insists on them.
*/
ap = (char *)NULL;
if (return_path[0])
ap = return_path;
else if (from_offs == -1 || !(ap = nxtaddr(headers + from_offs)))
ap = user;
if (SMTP_from(ctl->smtp_socket, ap, options) != SM_OK)
{
int smtperr = atoi(smtp_response);
/*
* Suppress error message only if the response specifically
* means `excluded for policy reasons'. We *should* see
* an error when the return code is less specific.
*/
if (smtperr >= 400 && smtperr != 571)
error(0, -1, "SMTP error: %s", smtp_response);
switch (smtperr)
{
case 571: /* sendmail's "unsolicited email refused" */
case 501: /* exim's old antispam response */
case 550: /* exim's new antispam response (temporary) */
/*
* SMTP listener explicitly refuses to deliver
* mail coming from this address, probably due
* to an anti-spam domain exclusion. Respect
* this. Don't try to ship the message, and
* don't prevent it from being deleted.
*/
free(headers);
return(PS_REFUSED);
case 452: /* insufficient system storage */
/*
* Temporary out-of-queue-space condition on the
* ESMTP server. Don't try to ship the message,
* and suppress deletion so it can be retried on
* a future retrieval cycle.
*/
SMTP_rset(ctl->smtp_socket); /* required by RFC1870 */
free(headers);
return(PS_TRANSIENT);
case 552: /* message exceeds fixed maximum message size */
/*
* Permanent no-go condition on the
* ESMTP server. Don't try to ship the message,
* and allow it to be deleted.
*/
SMTP_rset(ctl->smtp_socket); /* required by RFC1870 */
free(headers);
return(PS_REFUSED);
default: /* retry with invoking user's address */
if (SMTP_from(ctl->smtp_socket, user, options) != SM_OK)
{
error(0, -1, "SMTP error: %s", smtp_response);
free(headers);
return(PS_SMTP); /* should never happen */
}
}
}
/*
* Now list the recipient addressees
*
* RFC 1123 requires that the domain name part of the
* RCPT TO address be "canonicalized", that is a FQDN
* or MX but not a CNAME. RFC1123 doesn't say whether
* the FQDN part can be null (as it frequently will be
* here), but it's hard to see how this could cause a
* problem.
*/
for (idp = xmit_names; idp; idp = idp->next)
if (idp->val.num == XMIT_ACCEPT)
if (SMTP_rcpt(ctl->smtp_socket, idp->id) == SM_OK)
good_addresses++;
else
{
bad_addresses++;
idp->val.num = XMIT_ANTISPAM;
error(0, 0,
"SMTP listener doesn't like recipient address `%s'", idp->id);
}
if (!good_addresses && SMTP_rcpt(ctl->smtp_socket, user) != SM_OK)
{
error(0, 0,
"can't even send to calling user!");
free(headers);
return(PS_SMTP);
}
/* tell it we're ready to send data */
SMTP_data(ctl->smtp_socket);
}
/* we may need to strip carriage returns */
if (ctl->stripcr)
{
char *sp, *tp;
for (sp = tp = headers; *sp; sp++)
if (*sp != '\r')
*tp++ = *sp;
*tp = '\0';
}
/* write all the headers */
n = 0;
if (ctl->mda && sinkfp)
n = fwrite(headers, 1, strlen(headers), sinkfp);
else if (ctl->smtp_socket != -1)
n = SockWrite(ctl->smtp_socket, headers, strlen(headers));
free(headers);
if (n < 0)
{
error(0, errno, "writing RFC822 headers");
if (ctl->mda)
{
pclose(sinkfp);
signal(SIGCHLD, sigchld);
}
return(PS_IOERR);
}
else if (outlevel == O_VERBOSE)
fputs("#", stderr);
/* write error notifications */
#ifdef HAVE_RES_SEARCH
if (no_local_matches || has_nuls || bad_addresses)
#else
if (has_nuls || bad_addresses)
#endif /* HAVE_RES_SEARCH */
{
int errlen = 0;
char errhd[USERNAMELEN + POPBUFSIZE], *errmsg;
errmsg = errhd;
(void) strcpy(errhd, "X-Fetchmail-Warning: ");
#ifdef HAVE_RES_SEARCH
if (no_local_matches)
{
if (reject_count != 1)
strcat(errhd, "no recipient addresses matched declared local names");
else
{
for (idp = xmit_names; idp; idp = idp->next)
if (idp->val.num == XMIT_REJECT)
break;
sprintf(errhd+strlen(errhd), "recipient address %s didn't match any local name", idp->id);
}
}
#endif /* HAVE_RES_SEARCH */
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 = xmit_names; idp; idp = idp->next)
if (idp->val.num == XMIT_ANTISPAM)
errlen += strlen(idp->id) + 2;
errmsg = alloca(errlen+3);
(void) strcpy(errmsg, errhd);
for (idp = xmit_names; idp; idp = idp->next)
if (idp->val.num == XMIT_ANTISPAM)
{
strcat(errmsg, idp->id);
if (idp->next)
strcat(errmsg, ", ");
}
}
if (ctl->mda && !ctl->forcecr)
strcat(errmsg, "\n");
else
strcat(errmsg, "\r\n");
/* we may need to strip carriage returns */
if (ctl->stripcr)
{
char *sp, *tp;
for (sp = tp = errmsg; *sp; sp++)
if (*sp != '\r')
*tp++ = *sp;
*tp = '\0';
}
/* ship out the error line */
if (sinkfp)
{
if (ctl->mda)
fwrite(errmsg, sizeof(char), strlen(errmsg), sinkfp);
else
SockWrite(ctl->smtp_socket, errmsg, strlen(errmsg));
}
}
free_str_list(&xmit_names);
/* issue the delimiter line */
if (sinkfp && ctl->mda)
fputc('\n', sinkfp);
else if (ctl->smtp_socket != -1)
{
if (ctl->stripcr)
SockWrite(ctl->smtp_socket, "\n", 1);
else
SockWrite(ctl->smtp_socket, "\r\n", 2);
}
return(PS_SUCCESS);
}
static int readbody(sock, ctl, forward, len, delimited)
/* read and dispose of a message body presented on sock */
struct query *ctl; /* query control record */
int sock; /* to which the server is connected */
int len; /* length of message */
bool forward; /* TRUE to forward */
bool delimited; /* does the protocol use a message delimiter? */
{
int linelen;
char buf[MSGBUFSIZE+1], *cp;
/* pass through the text lines */
while (delimited || len > 0)
{
if ((linelen = SockRead(sock, buf, sizeof(buf)-1)) == -1)
return(PS_SOCKET);
set_timeout(ctl->server.timeout);
/* write the message size dots */
if (linelen > 0)
{
sizeticker += linelen;
while (sizeticker >= SIZETICKER)
{
if (outlevel > O_SILENT)
error_build(".");
sizeticker -= SIZETICKER;
}
}
len -= linelen;
/* fix messages that have only \n line-termination (for qmail) */
if (ctl->forcecr)
{
cp = buf + strlen(buf) - 1;
if (*cp == '\n' && (cp == buf || cp[-1] != '\r'))
{
*cp++ = '\r';
*cp++ = '\n';
*cp++ = '\0';
}
}
/* check for end of message */
if (delimited && *buf == '.')
if (buf[1] == '\r' && buf[2] == '\n')
break;
/* ship out the text line */
if (forward)
{
int n;
/*
* SMTP byte-stuffing. We only do this if the protocol does *not*
* use .<CR><LF> as EOM. If it does, the server will already have
* decorated any . lines it sends back up.
*/
if (!delimited && *buf == '.')
if (sinkfp && ctl->mda)
fputs(".", sinkfp);
else if (ctl->smtp_socket != -1)
SockWrite(ctl->smtp_socket, buf, 1);
/* we may need to strip carriage returns */
if (ctl->stripcr)
{
char *sp, *tp;
for (sp = tp = buf; *sp; sp++)
if (*sp != '\r')
*tp++ = *sp;
*tp = '\0';
}
n = 0;
if (ctl->mda)
n = fwrite(buf, 1, strlen(buf), sinkfp);
else if (ctl->smtp_socket != -1)
n = SockWrite(ctl->smtp_socket, buf, strlen(buf));
if (n < 0)
{
error(0, errno, "writing message text");
if (ctl->mda)
{
pclose(sinkfp);
signal(SIGCHLD, sigchld);
}
return(PS_IOERR);
}
else if (outlevel == O_VERBOSE)
fputc('*', stderr);
}
}
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 */
const char *canonical; /* server name */
{
char * host_primary;
KTEXT ticket;
MSG_DAT msg_data;
CREDENTIALS cred;
Key_schedule schedule;
int rem;
ticket = ((KTEXT) (malloc (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"));
free (ticket);
if (rem != KSUCCESS)
{
error(0, -1, "kerberos error %s", (krb_get_err_text (rem)));
return (PS_ERROR);
}
return (0);
}
#endif /* KERBEROS_V4 */
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, js, pst, sock = -1;
char *msg, *cp, realname[HOSTLEN];
void (*sigsave)();
#ifndef KERBEROS_V4
if (ctl->server.preauthenticate == A_KERBEROS_V4)
{
error(0, -1, "Kerberos V4 support not linked.");
return(PS_ERROR);
}
#endif /* KERBEROS_V4 */
/* lacking methods, there are some options that may fail */
if (!proto->is_old)
{
/* check for unsupported options */
if (ctl->flush) {
error(0, 0,
"Option --flush is not supported with %s",
proto->name);
return(PS_SYNTAX);
}
else if (ctl->fetchall) {
error(0, 0,
"Option --all is not supported with %s",
proto->name);
return(PS_SYNTAX);
}
}
if (!proto->getsizes && ctl->limit)
{
error(0, 0,
"Option --limit is not supported with %s",
proto->name);
return(PS_SYNTAX);
}
protocol = proto;
tagnum = 0;
tag[0] = '\0'; /* nuke any tag hanging out from previous query */
ok = 0;
error_init(poll_interval == 0 && !logfile);
/* set up the server-nonresponse timeout */
sigsave = signal(SIGALRM, timeout_handler);
set_timeout(mytimeout = ctl->server.timeout);
if ((js = setjmp(restart)) == 1)
{
error(0, 0,
"timeout after %d seconds waiting for %s.",
ctl->server.timeout, ctl->server.names->id);
if (ctl->smtp_socket != -1)
close(ctl->smtp_socket);
if (sock != -1)
close(sock);
ok = PS_ERROR;
}
else
{
char buf [POPBUFSIZE+1], *sp;
int *msgsizes, len, num, count, new, deletions = 0;
int port, fetches;
struct idlist *idp;
/* execute pre-initialization command, if any */
if (ctl->preconnect && (ok = system(ctl->preconnect)))
{
sprintf(buf, "pre-connection command failed with status %d", ok);
error(0, 0, buf);
ok = PS_SYNTAX;
goto closeUp;
}
/* open a socket to the mail server */
port = ctl->server.port ? ctl->server.port : protocol->port;
if ((sock = SockOpen(ctl->server.names->id, port)) == -1)
{
#ifndef EHOSTUNREACH
#define EHOSTUNREACH (-1)
#endif
if (outlevel == O_VERBOSE || errno != EHOSTUNREACH)
error(0, errno, "connecting to host");
ok = PS_SOCKET;
goto closeUp;
}
#ifdef KERBEROS_V4
if (ctl->server.preauthenticate == A_KERBEROS_V4)
{
ok = kerberos_auth(sock, ctl->server.canonical_name);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
}
#endif /* KERBEROS_V4 */
/* accept greeting message from mail server */
ok = (protocol->parse_response)(sock, buf);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
/*
* Try to parse the host's actual name out of the greeting
* message. We do this so that the progress messages will
* make sense even if the connection is indirected through
* ssh. *Do* use this for hacking reply headers, but *don't*
* use it for error logging, as the names in the log should
* correlate directly back to rc file entries.
*
* This assumes that the first space-delimited token found
* that contains at least two dots (with the characters on
* each side of the dot alphanumeric to exclude version
* numbers) is the hostname. The hostname candidate may not
* contain @ -- if it does it's probably a mailserver
* maintainer's name. If no such token is found, fall back on
* the .fetchmailrc id.
*/
pst = 0;
sp = (char *)NULL; /* sacrifice to -Wall */
for (cp = buf; *cp; cp++)
{
switch (pst)
{
case 0: /* skip to end of current token */
if (*cp == ' ')
pst = 1;
break;
case 1: /* look for blank-delimited token */
if (*cp != ' ')
{
sp = cp;
pst = 2;
}
break;
case 2: /* look for first dot */
if (*cp == '@')
pst = 0;
else if (*cp == ' ')
pst = 1;
else if (*cp == '.' && isalpha(cp[1]) && isalpha(cp[-1]))
pst = 3;
break;
case 3: /* look for second dot */
if (*cp == '@')
pst = 0;
else if (*cp == ' ')
pst = 1;
else if (*cp == '.' && isalpha(cp[1]) && isalpha(cp[-1]))
pst = 4;
break;
case 4: /* look for trailing space */
if (*cp == '@')
pst = 0;
else if (*cp == ' ')
{
pst = 5;
goto done;
}
break;
}
}
done:
if (pst == 5)
{
char *tp = realname;
while (sp < cp)
*tp++ = *sp++;
*tp = '\0';
}
else
strcpy(realname, ctl->server.names->id);
/* try to get authorized to fetch mail */
if (protocol->getauth)
{
shroud = ctl->password;
ok = (protocol->getauth)(sock, ctl, buf);
shroud = (char *)NULL;
if (ok == PS_ERROR)
ok = PS_AUTHFAIL;
if (ok != 0)
{
error(0, -1, "Authorization failure on %s@%s",
ctl->remotename,
realname);
goto cleanUp;
}
set_timeout(ctl->server.timeout);
}
ctl->errcount = fetches = 0;
/* now iterate over each folder selected */
for (idp = ctl->mailboxes; idp; idp = idp->next)
{
if (outlevel >= O_VERBOSE)
if (idp->next)
error(0, 0, "selecting folder %s");
else
error(0, 0, "selecting default folder");
/* compute number of messages and number of new messages waiting */
ok = (protocol->getrange)(sock, ctl, idp->id, &count, &new);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
/* show user how many messages we downloaded */
if (idp->id)
(void) sprintf(buf, "%s@%s:%s",
ctl->remotename, realname, idp->id);
else
(void) sprintf(buf, "%s@%s", ctl->remotename, realname);
if (outlevel > O_SILENT)
if (count == -1) /* only used for ETRN */
error(0, 0, "Polling %s", buf);
else if (count == 0)
error(0, 0, "No mail at %s", buf);
else
{
if (new != -1 && (count - new) > 0)
error(0, 0, "%d message%s (%d seen) at %s.",
count, count > 1 ? "s" : "", count-new, buf);
else
error(0, 0, "%d message%s at %s.",
count, count > 1 ? "s" : "", buf);
}
if (check_only)
{
if (new == -1 || ctl->fetchall)
new = count;
ok = ((new > 0) ? PS_SUCCESS : PS_NOMAIL);
goto cleanUp;
}
else if (count > 0)
{
bool force_retrieval;
/*
* What forces this code is that in POP3 and IMAP2BIS you can't
* fetch a message without having it marked `seen'. In IMAP4,
* on the other hand, you can (peek_capable is set to convey
* this).
*
* 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 may need to get sizes in order to check message
* limits. Or it may be forced because the fetch methods
* don't return reliable sizes.
*/
msgsizes = (int *)NULL;
if (proto->getsizes && (proto->force_getsizes || ctl->limit > 0))
{
msgsizes = (int *)alloca(sizeof(int) * count);
ok = (proto->getsizes)(sock, count, msgsizes);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
}
/* read, forward, and delete messages */
for (num = 1; num <= count; num++)
{
bool toolarge = (ctl->limit > 0)
&& msgsizes && (msgsizes[num-1] > ctl->limit);
bool fetch_it = !toolarge
&& (ctl->fetchall || force_retrieval || !(protocol->is_old && (protocol->is_old)(sock,ctl,num)));
bool suppress_delete = FALSE;
bool suppress_forward = FALSE;
/* we may want to reject this message if it's old */
if (!fetch_it)
{
if (outlevel > O_SILENT)
{
error_build("skipping message %d", num);
if (toolarge)
error_build(" (oversized, %d bytes)", msgsizes[num-1]);
}
}
else
{
bool wholesize = !protocol->fetch_body;
/* request a message */
ok = (protocol->fetch_headers)(sock, ctl, num, &len);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
/* -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)
{
error_build("reading message %d", num);
if (len > 0)
error_build(" (%d %sbytes)",
len, wholesize ? "" : "header ");
if (outlevel == O_VERBOSE)
error_complete(0, 0, "");
else
error_build(" ");
}
/*
* Read the message headers and ship them to the
* output sink.
*/
ok = readheaders(sock, len, ctl, realname);
if (ok == PS_TRANSIENT)
suppress_delete = TRUE;
else if (ok == PS_REFUSED)
suppress_forward = TRUE;
else if (ok)
goto cleanUp;
set_timeout(ctl->server.timeout);
/*
* 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
* read_headers.
*/
if (protocol->fetch_body)
{
if ((ok = (protocol->trail)(sock, ctl, num)))
goto cleanUp;
set_timeout(ctl->server.timeout);
len = 0;
if (!suppress_forward)
{
if ((ok=(protocol->fetch_body)(sock,ctl,num,&len)))
goto cleanUp;
if (outlevel > O_SILENT && !msgsizes)
error_build(" (%d body bytes) ", len);
set_timeout(ctl->server.timeout);
}
}
/* process the body now */
if (len > 0)
{
ok = readbody(sock,
ctl,
!suppress_forward,
len,
protocol->delimited);
if (ok == PS_TRANSIENT)
suppress_delete = TRUE;
else if (ok)
goto cleanUp;
set_timeout(ctl->server.timeout);
/* tell server we got it OK and resynchronize */
if (protocol->trail)
{
ok = (protocol->trail)(sock, ctl, num);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
}
}
/* end-of-message processing starts here */
if (outlevel == O_VERBOSE)
fputc('\n', stderr);
if (ctl->mda)
{
int rc;
/* close the delivery pipe, we'll reopen before next message */
rc = pclose(sinkfp);
signal(SIGCHLD, sigchld);
if (rc)
{
error(0, -1, "MDA exited abnormally or returned nonzero status");
goto cleanUp;
}
}
else if (!suppress_forward)
{
/* write message terminator */
if (SMTP_eom(ctl->smtp_socket) != SM_OK)
{
error(0, -1, "SMTP listener refused delivery");
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.
*/
/* maybe we delete this message now? */
if (protocol->delete
&& !suppress_delete
&& (fetch_it ? !ctl->keep : ctl->flush))
{
deletions++;
if (outlevel > O_SILENT)
error_complete(0, 0, " flushed");
ok = (protocol->delete)(sock, ctl, num);
if (ok != 0)
goto cleanUp;
set_timeout(ctl->server.timeout);
delete_str(&ctl->newsaved, num);
}
else if (outlevel > O_SILENT)
error_complete(0, 0, " not flushed");
/* perhaps this as many as we're ready to handle */
if (ctl->fetchlimit > 0 && ctl->fetchlimit <= fetches)
goto no_error;
}
}
}
no_error:
set_timeout(ctl->server.timeout);
ok = gen_transact(sock, protocol->exit_cmd);
if (ok == 0)
ok = (fetches > 0) ? PS_SUCCESS : PS_NOMAIL;
set_timeout(0);
close(sock);
goto closeUp;
cleanUp:
set_timeout(ctl->server.timeout);
if (ok != 0 && ok != PS_SOCKET)
gen_transact(sock, protocol->exit_cmd);
set_timeout(0);
close(sock);
}
msg = (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_SMTP:
msg = "SMTP transaction";
break;
case PS_UNDEFINED:
error(0, 0, "undefined");
break;
}
if (ok==PS_SOCKET || ok==PS_AUTHFAIL || ok==PS_SYNTAX || ok==PS_IOERR
|| ok==PS_ERROR || ok==PS_PROTOCOL || ok==PS_SMTP)
error(0, -1, "%s error while fetching from %s", msg, ctl->server.names->id);
closeUp:
signal(SIGALRM, sigsave);
return(ok);
}
#if defined(HAVE_STDARG_H)
void gen_send(int sock, char *fmt, ... )
/* assemble command in printf(3) style and send to the server */
#else
void gen_send(sock, fmt, va_alist)
/* assemble command in printf(3) style and send to the server */
int sock; /* socket to which server is connected */
const char *fmt; /* printf-style format */
va_dcl
#endif
{
char buf [POPBUFSIZE+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
vsprintf(buf + strlen(buf), fmt, ap);
va_end(ap);
strcat(buf, "\r\n");
SockWrite(sock, buf, strlen(buf));
if (outlevel == O_VERBOSE)
{
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';
error(0, 0, "%s> %s", 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 */
{
if (SockRead(sock, buf, size) == -1)
return(PS_SOCKET);
else
{
if (buf[strlen(buf)-1] == '\n')
buf[strlen(buf)-1] = '\0';
if (buf[strlen(buf)-1] == '\r')
buf[strlen(buf)-1] = '\r';
if (outlevel == O_VERBOSE)
error(0, 0, "%s< %s", protocol->name, buf);
return(PS_SUCCESS);
}
}
#if defined(HAVE_STDARG_H)
int gen_transact(int sock, char *fmt, ... )
/* assemble command in printf(3) style, send to server, accept a response */
#else
int gen_transact(int sock, fmt, va_alist)
/* assemble command in printf(3) style, send to server, accept a response */
int sock; /* socket to which server is connected */
const char *fmt; /* printf-style format */
va_dcl
#endif
{
int ok;
char buf [POPBUFSIZE+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
vsprintf(buf + strlen(buf), fmt, ap);
va_end(ap);
strcat(buf, "\r\n");
SockWrite(sock, buf, strlen(buf));
if (outlevel == O_VERBOSE)
{
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';
error(0, 0, "%s> %s", protocol->name, buf);
}
/* we presume this does its own response echoing */
ok = (protocol->parse_response)(sock, buf);
set_timeout(mytimeout);
return(ok);
}
/* driver.c ends here */