#include "config.h"
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#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
#include <ctype.h>
#include <langinfo.h>
#include "fetchmail.h"
#define _USE_BSD
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include "socket.h"
#include "smtp.h"
#include "i18n.h"
#if !defined(SIGCHLD) && defined(SIGCLD)
#define SIGCHLD SIGCLD
#endif
static int lmtp_responses;
void smtp_close(struct query *ctl, int sayquit)
{
if (ctl->smtp_socket != -1)
{
if (sayquit)
SMTP_quit(ctl->smtp_socket, ctl->smtphostmode);
SockClose(ctl->smtp_socket);
ctl->smtp_socket = -1;
}
batchcount = 0;
}
int smtp_open(struct query *ctl)
{
if (last_smtp_ok > 0 && time((time_t *)NULL) - last_smtp_ok > mytimeout)
{
smtp_close(ctl, 1);
last_smtp_ok = 0;
}
if (NUM_NONZERO(ctl->batchlimit)) {
if (batchcount == ctl->batchlimit)
smtp_close(ctl, 1);
batchcount++;
}
if (ctl->smtp_socket == -1)
{
struct idlist *idp;
const char *id_me = run.invisible ? ctl->server.truename : fetchmailhost;
int oldphase = phase;
char *parsed_host = NULL;
errno = 0;
oldphase = phase;
phase = LISTENER_WAIT;
set_timeout(ctl->server.timeout);
for (idp = ctl->smtphunt; idp; idp = idp->next)
{
char *cp;
char *portnum = SMTP_PORT;
ctl->smtphost = idp->id;
if (ctl->smtphost[0]=='/')
{
ctl->smtphostmode = LMTP_MODE;
xfree(parsed_host);
if ((ctl->smtp_socket = UnixOpen(ctl->smtphost))==-1)
continue;
}
else
{
ctl->smtphostmode = ctl->listener;
parsed_host = xstrdup(idp->id);
if ((cp = strrchr(parsed_host, '/')))
{
*cp++ = 0;
if (cp[0])
portnum = cp;
}
if ((ctl->smtp_socket = SockOpen(parsed_host,portnum,
ctl->server.plugout, &ai1)) == -1)
{
xfree(parsed_host);
continue;
}
}
if (ctl->server.protocol == P_ODMR)
{
set_timeout(0);
phase = oldphase;
xfree(parsed_host);
return(ctl->smtp_socket);
}
if (SMTP_ok(ctl->smtp_socket, ctl->smtphostmode, TIMEOUT_STARTSMTP) == SM_OK &&
SMTP_ehlo(ctl->smtp_socket, ctl->smtphostmode, id_me,
ctl->server.esmtp_name, ctl->server.esmtp_password,
&ctl->server.esmtp_options) == SM_OK)
break;
smtp_close(ctl, 0);
if (ctl->smtphost[0]=='/')
{
if ((ctl->smtp_socket = UnixOpen(ctl->smtphost))==-1)
continue;
}
else
{
if ((ctl->smtp_socket = SockOpen(parsed_host,portnum,
ctl->server.plugout, &ai1)) == -1)
{
xfree(parsed_host);
continue;
}
}
if (SMTP_ok(ctl->smtp_socket, ctl->smtphostmode, TIMEOUT_STARTSMTP) == SM_OK &&
SMTP_helo(ctl->smtp_socket, ctl->smtphostmode, id_me) == SM_OK)
break;
smtp_close(ctl, 0);
}
set_timeout(0);
phase = oldphase;
xfree(ctl->destaddr);
if (ctl->smtpaddress)
ctl->destaddr = xstrdup(ctl->smtpaddress);
else if (parsed_host && parsed_host[0] != 0)
ctl->destaddr = xstrdup(parsed_host);
else
ctl->destaddr = xstrdup("localhost");
xfree(parsed_host);
}
if (outlevel >= O_DEBUG && ctl->smtp_socket != -1)
report(stdout, GT_("forwarding to %s\n"), ctl->smtphost);
return(ctl->smtp_socket);
}
static void sanitize(char *s)
{
char *cp;
for (cp = s; (cp = strchr (cp, '\'')); cp++)
*cp = '_';
}
char *rcpt_address(struct query *ctl, const char *id,
int usesmtpname)
{
static char addr[HOSTLEN+USERNAMELEN+1];
if (strchr(id, '@'))
{
snprintf(addr, sizeof (addr), "%s", id);
}
else if (usesmtpname && ctl->smtpname)
{
snprintf(addr, sizeof (addr), "%s", ctl->smtpname);
}
else
{
snprintf(addr, sizeof (addr), "%s@%s", id, ctl->destaddr);
}
return addr;
}
static int send_bouncemail(struct query *ctl, struct msgblk *msg,
int userclass, char *message ,
int nerrors, char *errors[])
{
char daemon_name[15 + HOSTLEN] = "MAILER-DAEMON@";
char boundary[BUFSIZ], *bounce_to;
int sock;
static char *fqdn_of_host = NULL;
const char *md1 = "MAILER-DAEMON", *md2 = "MAILER-DAEMON@";
if (!msg || !msg->return_path[0] ||
strcmp(msg->return_path, "<>") == 0 ||
strcasecmp(msg->return_path, md1) == 0 ||
strncasecmp(msg->return_path, md2, strlen(md2)) == 0)
return(TRUE);
bounce_to = (run.bouncemail ? msg->return_path : run.postmaster);
if (fqdn_of_host == NULL)
fqdn_of_host = host_fqdn(0);
strlcat(daemon_name, fqdn_of_host, sizeof(daemon_name));
if ((sock = SockOpen("localhost", SMTP_PORT, NULL, &ai1)) == -1)
return(FALSE);
if (SMTP_ok(sock, SMTP_MODE, TIMEOUT_STARTSMTP) != SM_OK)
{
SockClose(sock);
return FALSE;
}
if (SMTP_helo(sock, SMTP_MODE, fetchmailhost) != SM_OK
|| SMTP_from(sock, SMTP_MODE, "<>", (char *)NULL) != SM_OK
|| SMTP_rcpt(sock, SMTP_MODE, bounce_to) != SM_OK
|| SMTP_data(sock, SMTP_MODE) != SM_OK)
{
SMTP_quit(sock, SMTP_MODE);
SockClose(sock);
return(FALSE);
}
snprintf(boundary, sizeof(boundary), "foo-mani-padme-hum-%ld-%ld-%ld",
(long)getpid(), (long)getppid(), (long)time(NULL));
if (outlevel >= O_VERBOSE)
report(stdout, GT_("SMTP: (bounce-message body)\n"));
else
report(stderr, GT_("mail from %s bounced to %s\n"),
daemon_name, bounce_to);
SockPrintf(sock, "Subject: Mail delivery failed: returning message to sender\r\n");
SockPrintf(sock, "From: Mail Delivery System <%s>\r\n", daemon_name);
SockPrintf(sock, "To: %s\r\n", bounce_to);
SockPrintf(sock, "MIME-Version: 1.0\r\n");
SockPrintf(sock, "Content-Type: multipart/report; report-type=delivery-status;\r\n\tboundary=\"%s\"\r\n", boundary);
SockPrintf(sock, "\r\n");
SockPrintf(sock, "--%s\r\n", boundary);
SockPrintf(sock,"Content-Type: text/plain\r\n");
SockPrintf(sock, "\r\n");
SockPrintf(sock, "This message was created automatically by mail delivery software.\r\n");
SockPrintf(sock, "\r\n");
SockPrintf(sock, "A message that you sent could not be delivered to one or more of its\r\n");
SockPrintf(sock, "recipients. This is a permanent error.\r\n");
SockPrintf(sock, "\r\n");
SockPrintf(sock, "Reason: %s", message);
SockPrintf(sock, "\r\n");
SockPrintf(sock, "The following address(es) failed:\r\n");
if (nerrors)
{
struct idlist *idp;
int nusers;
nusers = 0;
for (idp = msg->recipients; idp; idp = idp->next)
{
if (idp->val.status.mark == userclass)
{
char *error;
SockPrintf(sock, "%s\r\n", rcpt_address (ctl, idp->id, 1));
if (nerrors == 1) error = errors[0];
else if (nerrors <= nusers)
{
SockPrintf(sock, "Internal error: SMTP error count doesn't match number of recipients.\r\n");
break;
}
else error = errors[nusers++];
SockPrintf(sock, " SMTP error: %s\r\n\r\n", error);
}
}
SockPrintf(sock, "--%s\r\n", boundary);
SockPrintf(sock,"Content-Type: message/delivery-status\r\n");
SockPrintf(sock, "\r\n");
SockPrintf(sock, "Reporting-MTA: dns; %s\r\n", fqdn_of_host);
nusers = 0;
for (idp = msg->recipients; idp; idp = idp->next)
if (idp->val.status.mark == userclass)
{
char *error;
SockPrintf(sock, "\r\n");
SockPrintf(sock, "Final-Recipient: rfc822; %s\r\n",
rcpt_address (ctl, idp->id, 1));
SockPrintf(sock, "Last-Attempt-Date: %s\r\n", rfc822timestamp());
SockPrintf(sock, "Action: failed\r\n");
if (nerrors == 1)
error = errors[0];
else if (nerrors <= nusers)
{
SockPrintf(sock, "Internal error: SMTP error count doesn't match number of recipients.\r\n");
break;
}
else
error = errors[nusers++];
if (strlen(error) > 9 && isdigit((unsigned char)error[4])
&& error[5] == '.' && isdigit((unsigned char)error[6])
&& error[7] == '.' && isdigit((unsigned char)error[8]))
SockPrintf(sock, "Status: %5.5s\r\n", &(error[4]));
else
SockPrintf(sock, "Status: %c.0.0\r\n", error[0]);
SockPrintf(sock, "Diagnostic-Code: %s\r\n", error);
}
SockPrintf(sock, "\r\n");
}
SockPrintf(sock, "--%s\r\n", boundary);
SockPrintf(sock, "Content-Type: text/rfc822-headers\r\n");
SockPrintf(sock, "\r\n");
if (msg->headers)
{
SockWrite(sock, msg->headers, strlen(msg->headers));
SockPrintf(sock, "\r\n");
}
SockPrintf(sock, "--%s--\r\n", boundary);
if (SMTP_eom(sock, SMTP_MODE) != SM_OK
|| SMTP_quit(sock, SMTP_MODE) != SM_OK)
{
SockClose(sock);
return(FALSE);
}
SockClose(sock);
return(TRUE);
}
static int handle_smtp_report(struct query *ctl, struct msgblk *msg)
{
int smtperr = atoi(smtp_response);
char *responses[1];
struct idlist *walk;
int found = 0;
responses[0] = xstrdup(smtp_response);
#ifdef __UNUSED__
SMTP_rset(ctl->smtp_socket);
if (outlevel >= O_DEBUG)
report(stdout, GT_("Saved error is still %d\n"), smtperr);
#endif
for( walk = ctl->antispam; walk; walk = walk->next )
if ( walk->val.status.num == smtperr )
{
found=1;
break;
}
if ( found )
{
if (run.spambounce)
{
char rejmsg[160];
snprintf(rejmsg, sizeof(rejmsg),
"spam filter or virus scanner rejected message because:\r\n"
"%s\r\n", responses[0]);
send_bouncemail(ctl, msg, XMIT_ACCEPT,
rejmsg, 1, responses);
}
free(responses[0]);
return(PS_REFUSED);
}
if (smtperr >= 400)
report(stderr, GT_("%cMTP error: %s\n"),
ctl->smtphostmode,
responses[0]);
switch (smtperr)
{
case 552:
if (run.bouncemail)
send_bouncemail(ctl, msg, XMIT_ACCEPT,
"This message was too large (SMTP error 552).\r\n",
1, responses);
free(responses[0]);
return(PS_REFUSED);
case 553:
#ifdef __DONT_FEED_THE_SPAMMERS__
if (run.bouncemail)
send_bouncemail(ctl, msg, XMIT_ACCEPT,
"Invalid address in MAIL FROM (SMTP error 553).\r\n",
1, responses);
#endif
free(responses[0]);
return(PS_REFUSED);
case 530:
if (outlevel > O_SILENT)
report_complete(stdout,
GT_("SMTP server requires STARTTLS, keeping message.\n"));
free(responses[0]);
return(PS_TRANSIENT);
default:
if (smtperr >= 500 && smtperr <= 599)
{
if (run.bouncemail)
send_bouncemail(ctl, msg, XMIT_ACCEPT,
"General SMTP/ESMTP error.\r\n",
1, responses);
free(responses[0]);
return(PS_REFUSED);
}
free(responses[0]);
return(PS_TRANSIENT);
}
}
static int handle_smtp_report_without_bounce(struct query *ctl, struct msgblk *msg)
{
int smtperr = atoi(smtp_response);
(void)msg;
if (str_find(&ctl->antispam, smtperr))
{
if (run.spambounce)
return(PS_SUCCESS);
return(PS_REFUSED);
}
if (smtperr >= 400)
report(stderr, GT_("%cMTP error: %s\n"),
ctl->smtphostmode,
smtp_response);
switch (smtperr)
{
case 552:
if (run.bouncemail)
return(PS_SUCCESS);
return(PS_REFUSED);
case 553:
#ifdef __DONT_FEED_THE_SPAMMERS__
if (run.bouncemail)
return(PS_SUCCESS);
#endif
return(PS_REFUSED);
default:
if (smtperr >= 500 && smtperr <= 599)
return(PS_SUCCESS);
return(PS_TRANSIENT);
}
}
static FILE *sinkfp;
int stuffline(struct query *ctl, char *buf)
{
int n, oldphase;
char *last;
last = buf + 1;
while ((last += strlen(last)) && (last[-1] != '\n'))
last++;
if (ctl->forcecr)
{
if (last - 1 == buf || last[-2] != '\r')
{
last[-1] = '\r';
*last++ = '\n';
*last = '\0';
}
}
oldphase = phase;
phase = FORWARDING_WAIT;
if (*buf == '.')
{
if (ctl->server.base_protocol->delimited)
{
if (ctl->mda) {
++buf;
} else {
;
}
}
else
{
if (!ctl->mda) {
if (!ctl->bsmtp) {
n = SockWrite(ctl->smtp_socket, buf, 1);
} else {
n = fwrite(buf, 1, 1, sinkfp);
if (ferror(sinkfp)) n = -1;
}
if (n < 0)
return n;
}
}
}
if (ctl->stripcr)
{
char *sp, *tp;
for (sp = tp = buf; sp < last; sp++)
if (*sp != '\r')
*tp++ = *sp;
*tp = '\0';
last = tp;
}
n = 0;
if (ctl->mda || ctl->bsmtp) {
n = fwrite(buf, 1, last - buf, sinkfp);
if (ferror(sinkfp)) n = -1;
} else if (ctl->smtp_socket != -1)
n = SockWrite(ctl->smtp_socket, buf, last - buf);
phase = oldphase;
return(n);
}
static int open_bsmtp_sink(struct query *ctl, struct msgblk *msg,
int *good_addresses, int *bad_addresses)
{
struct idlist *idp;
int need_anglebrs;
if (strcmp(ctl->bsmtp, "-") == 0)
sinkfp = stdout;
else
sinkfp = fopen(ctl->bsmtp, "a");
if (!sinkfp || ferror(sinkfp)) {
report(stderr, GT_("BSMTP file open failed: %s\n"),
strerror(errno));
return(PS_BSMTP);
}
need_anglebrs = (msg->return_path[0] != '<');
fprintf(sinkfp,
"MAIL FROM:%s%s%s",
need_anglebrs ? "<" : "",
(msg->return_path[0]) ? msg->return_path : user,
need_anglebrs ? ">" : "");
if (ctl->pass8bits || (ctl->mimemsg & MSG_IS_8BIT))
fputs(" BODY=8BITMIME", sinkfp);
else if (ctl->mimemsg & MSG_IS_7BIT)
fputs(" BODY=7BIT", sinkfp);
fprintf(sinkfp, "\r\n");
xfree(ctl->destaddr);
ctl->destaddr = xstrdup(ctl->smtpaddress ? ctl->smtpaddress : "localhost");
*bad_addresses = 0;
for (idp = msg->recipients; idp; idp = idp->next)
if (idp->val.status.mark == XMIT_ACCEPT)
{
fprintf(sinkfp, "RCPT TO:<%s>\r\n",
rcpt_address (ctl, idp->id, 1));
(*good_addresses)++;
}
fputs("DATA\r\n", sinkfp);
if (fflush(sinkfp) || ferror(sinkfp))
{
report(stderr, GT_("BSMTP preamble write failed.\n"));
return(PS_BSMTP);
}
return(PS_SUCCESS);
}
#define EXPLICIT_BOUNCE_ON_BAD_ADDRESS
static const char *is_quad(const char *q)
{
const char *r;
if (!q || !*q)
return NULL;
if (*q == '.')
q++;
for(r=q;isdigit((unsigned char)*r);r++)
;
if ( ((*r) && (*r != '.')) || ((r-q) < 1) || ((r-q)>3) )
return NULL;
if ( (r-q) == 3)
{
if (*q > '2')
return NULL;
else if (*q == '2')
{
if (*(q+1) > '5')
return NULL;
else if (*(q+1) == '5')
{
if (*(q+2) > '5')
return NULL;
}
}
}
return r;
}
static int is_dottedquad(const char *hostname)
{
return ((hostname=is_quad(is_quad(is_quad(is_quad(hostname))))) != NULL) &&
(*hostname == '\0');
}
static int open_smtp_sink(struct query *ctl, struct msgblk *msg,
int *good_addresses, int *bad_addresses )
{
const char *ap;
struct idlist *idp;
char options[MSGBUFSIZE];
char addr[HOSTLEN+USERNAMELEN+1];
#ifdef EXPLICIT_BOUNCE_ON_BAD_ADDRESS
char **from_responses;
#endif
int total_addresses;
int force_transient_error = 0;
int smtp_err;
options[0] = '\0';
if (ctl->server.esmtp_options & ESMTP_8BITMIME) {
if (ctl->pass8bits || (ctl->mimemsg & MSG_IS_8BIT))
strcpy(options, " BODY=8BITMIME");
else if (ctl->mimemsg & MSG_IS_7BIT)
strcpy(options, " BODY=7BIT");
}
if ((ctl->server.esmtp_options & ESMTP_SIZE) && msg->reallen > 0)
sprintf(options + strlen(options), " SIZE=%d", msg->reallen);
if (!msg->return_path[0] || (msg->return_path[0] == '@'))
{
if (strchr(ctl->remotename,'@') || strchr(ctl->remotename,'!'))
{
snprintf(addr, sizeof(addr), "%s", ctl->remotename);
}
else if (is_dottedquad(ctl->server.truename))
{
snprintf(addr, sizeof(addr), "%s@[%s]", ctl->remotename,
ctl->server.truename);
}
else
{
snprintf(addr, sizeof(addr),
"%s@%s", ctl->remotename, ctl->server.truename);
}
ap = addr;
}
else if (strchr(msg->return_path,'@') || strchr(msg->return_path,'!'))
ap = msg->return_path;
else if (strcmp(msg->return_path,"<>") == 0)
ap = msg->return_path;
else
{
if (is_dottedquad(ctl->server.truename))
{
snprintf(addr, sizeof(addr), "%s@[%s]", msg->return_path,
ctl->server.truename);
}
else
{
snprintf(addr, sizeof(addr), "%s@%s",
msg->return_path, ctl->server.truename);
}
ap = addr;
}
if ((smtp_err = SMTP_from(ctl->smtp_socket, ctl->smtphostmode,
ap, options)) == SM_UNRECOVERABLE)
{
smtp_close(ctl, 0);
return(PS_TRANSIENT);
}
if (smtp_err != SM_OK)
{
int err = handle_smtp_report(ctl, msg);
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
return(err);
}
total_addresses = 0;
for (idp = msg->recipients; idp; idp = idp->next)
total_addresses++;
#ifdef EXPLICIT_BOUNCE_ON_BAD_ADDRESS
from_responses = (char **)xmalloc(sizeof(char *) * total_addresses);
#endif
for (idp = msg->recipients; idp; idp = idp->next)
if (idp->val.status.mark == XMIT_ACCEPT)
{
const char *address;
address = rcpt_address (ctl, idp->id, 1);
if ((smtp_err = SMTP_rcpt(ctl->smtp_socket, ctl->smtphostmode,
address)) == SM_UNRECOVERABLE)
{
smtp_close(ctl, 0);
transient:
#ifdef EXPLICIT_BOUNCE_ON_BAD_ADDRESS
while (*bad_addresses)
free(from_responses[--*bad_addresses]);
free(from_responses);
#endif
return(PS_TRANSIENT);
}
if (smtp_err == SM_OK)
(*good_addresses)++;
else
{
switch (handle_smtp_report_without_bounce(ctl, msg))
{
case PS_TRANSIENT:
force_transient_error = 1;
break;
case PS_SUCCESS:
#ifdef EXPLICIT_BOUNCE_ON_BAD_ADDRESS
from_responses[*bad_addresses] = xstrdup(smtp_response);
#endif
(*bad_addresses)++;
idp->val.status.mark = XMIT_RCPTBAD;
if (outlevel >= O_VERBOSE)
report(stderr,
GT_("%cMTP listener doesn't like recipient address `%s'\n"),
ctl->smtphostmode, address);
break;
case PS_REFUSED:
if (outlevel >= O_VERBOSE)
report(stderr,
GT_("%cMTP listener doesn't really like recipient address `%s'\n"),
ctl->smtphostmode, address);
break;
}
}
}
if (force_transient_error) {
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
goto transient;
}
#ifdef EXPLICIT_BOUNCE_ON_BAD_ADDRESS
if (*bad_addresses)
send_bouncemail(ctl, msg, XMIT_RCPTBAD,
"Some addresses were rejected by the MDA fetchmail forwards to.\r\n",
*bad_addresses, from_responses);
while (*bad_addresses)
free(from_responses[--*bad_addresses]);
free(from_responses);
#endif
if (!(*good_addresses))
{
if (!run.postmaster[0])
{
if (outlevel >= O_VERBOSE)
report(stderr, GT_("no address matches; no postmaster set.\n"));
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
return(PS_REFUSED);
}
if ((smtp_err = SMTP_rcpt(ctl->smtp_socket, ctl->smtphostmode,
rcpt_address (ctl, run.postmaster, 0))) == SM_UNRECOVERABLE)
{
smtp_close(ctl, 0);
return(PS_TRANSIENT);
}
if (smtp_err != SM_OK)
{
report(stderr, GT_("can't even send to %s!\n"), run.postmaster);
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
return(PS_REFUSED);
}
if (outlevel >= O_VERBOSE)
report(stderr, GT_("no address matches; forwarding to %s.\n"), run.postmaster);
}
if ((smtp_err = SMTP_data(ctl->smtp_socket, ctl->smtphostmode))
== SM_UNRECOVERABLE)
{
smtp_close(ctl, 0);
return(PS_TRANSIENT);
}
if (smtp_err != SM_OK)
{
int err = handle_smtp_report(ctl, msg);
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
return(err);
}
lmtp_responses = *good_addresses;
return(PS_SUCCESS);
}
static int open_mda_sink(struct query *ctl, struct msgblk *msg,
int *good_addresses, int *bad_addresses)
{
#ifdef HAVE_SETEUID
uid_t orig_uid;
#endif
struct idlist *idp;
int length = 0, fromlen = 0, nameslen = 0;
char *names = NULL, *before, *after, *from = NULL;
(void)bad_addresses;
xfree(ctl->destaddr);
ctl->destaddr = xstrdup("localhost");
for (idp = msg->recipients; idp; idp = idp->next)
if (idp->val.status.mark == XMIT_ACCEPT)
(*good_addresses)++;
length = strlen(ctl->mda);
before = xstrdup(ctl->mda);
if (strstr(before, "%s") || strstr(before, "%T"))
{
nameslen = 0;
for (idp = msg->recipients; idp; idp = idp->next)
if ((idp->val.status.mark == XMIT_ACCEPT))
nameslen += (strlen(idp->id) + 1);
if ((*good_addresses == 0))
nameslen = strlen(run.postmaster);
names = (char *)xmalloc(nameslen + 1);
if (*good_addresses == 0)
strcpy(names, run.postmaster);
else
{
names[0] = '\0';
for (idp = msg->recipients; idp; idp = idp->next)
if (idp->val.status.mark == XMIT_ACCEPT)
{
strcat(names, idp->id);
strcat(names, " ");
}
names[--nameslen] = '\0';
}
sanitize(names);
}
if (strstr(before, "%F"))
{
from = xstrdup(msg->return_path);
sanitize(from);
fromlen = strlen(from);
}
if (names || from)
{
char *sp, *dp;
sp = before;
while ((sp = strstr(sp, "%s"))) {
length += nameslen;
sp += 2;
}
sp = before;
while ((sp = strstr(sp, "%T"))) {
length += nameslen;
sp += 2;
}
sp = before;
while ((sp = strstr(sp, "%F"))) {
length += fromlen;
sp += 2;
}
after = (char *)xmalloc(length + 1);
for (dp = after, sp = before; (*dp = *sp); dp++, sp++) {
if (sp[0] != '%') continue;
if (sp[1] == 's' || sp[1] == 'T') {
*dp++ = '\'';
strcpy(dp, names);
dp += nameslen;
*dp++ = '\'';
sp++;
dp--;
} else if (sp[1] == 'F') {
*dp++ = '\'';
strcpy(dp, from);
dp += fromlen;
*dp++ = '\'';
sp++;
dp--;
}
}
if (names) {
free(names);
names = NULL;
}
if (from) {
free(from);
from = NULL;
}
free(before);
before = after;
}
if (outlevel >= O_DEBUG)
report(stdout, GT_("about to deliver with: %s\n"), before);
#ifdef HAVE_SETEUID
orig_uid = getuid();
seteuid(ctl->uid);
#endif
sinkfp = popen(before, "w");
free(before);
before = NULL;
#ifdef HAVE_SETEUID
seteuid(orig_uid);
#endif
if (!sinkfp)
{
report(stderr, GT_("MDA open failed\n"));
return(PS_IOERR);
}
set_signal_handler(SIGCHLD, SIG_DFL);
return(PS_SUCCESS);
}
int open_sink(struct query *ctl, struct msgblk *msg,
int *good_addresses, int *bad_addresses)
{
*bad_addresses = *good_addresses = 0;
if (ctl->bsmtp)
return(open_bsmtp_sink(ctl, msg, good_addresses, bad_addresses));
else if (!ctl->mda && smtp_open(ctl) != -1)
return(open_smtp_sink(ctl, msg, good_addresses, bad_addresses));
else if (!ctl->mda)
{
report(stderr, GT_("%cMTP connect to %s failed\n"),
ctl->smtphostmode,
ctl->smtphost ? ctl->smtphost : "localhost");
#ifndef FALLBACK_MDA
return(PS_SMTP);
#else
if (ctl->smtphost && strcmp(ctl->smtphost, "localhost"))
return(PS_SMTP);
ctl->mda = FALLBACK_MDA;
if (!ctl->forcecr)
ctl->stripcr = TRUE;
report(stderr, GT_("can't raise the listener; falling back to %s"),
FALLBACK_MDA);
#endif
}
if (ctl->mda)
return(open_mda_sink(ctl, msg, good_addresses, bad_addresses));
return(PS_SUCCESS);
}
void release_sink(struct query *ctl)
{
if (ctl->bsmtp && sinkfp)
{
if (strcmp(ctl->bsmtp, "-"))
{
fclose(sinkfp);
sinkfp = (FILE *)NULL;
}
}
else if (ctl->mda)
{
if (sinkfp)
{
pclose(sinkfp);
sinkfp = (FILE *)NULL;
}
deal_with_sigchld();
}
}
int close_sink(struct query *ctl, struct msgblk *msg, flag forward)
{
int smtp_err;
if (ctl->mda)
{
int rc = 0, e = 0, e2 = 0, err = 0;
if (sinkfp)
{
if (ferror(sinkfp))
err = 1, e2 = errno;
if ((fflush(sinkfp)))
err = 1, e2 = errno;
errno = 0;
rc = pclose(sinkfp);
e = errno;
sinkfp = (FILE *)NULL;
}
else
rc = e = 0;
deal_with_sigchld();
if (rc || err)
{
if (err) {
report(stderr, GT_("Error writing to MDA: %s\n"), strerror(e2));
} else if (WIFSIGNALED(rc)) {
report(stderr,
GT_("MDA died of signal %d\n"), WTERMSIG(rc));
} else if (WIFEXITED(rc)) {
report(stderr,
GT_("MDA returned nonzero status %d\n"), WEXITSTATUS(rc));
} else {
report(stderr,
GT_("Strange: MDA pclose returned %d and errno %d/%s, cannot handle at %s:%d\n"),
rc, e, strerror(e), __FILE__, __LINE__);
}
return(FALSE);
}
}
else if (ctl->bsmtp && sinkfp)
{
int error;
fputs(".\r\n", sinkfp);
error = ferror(sinkfp);
if (strcmp(ctl->bsmtp, "-"))
{
if (fclose(sinkfp) == EOF) error = 1;
sinkfp = (FILE *)NULL;
}
if (error)
{
report(stderr,
GT_("Message termination or close of BSMTP file failed\n"));
return(FALSE);
}
}
else if (forward)
{
if ((smtp_err = SMTP_eom(ctl->smtp_socket, ctl->smtphostmode))
== SM_UNRECOVERABLE)
{
smtp_close(ctl, 0);
return(FALSE);
}
if (smtp_err != SM_OK)
{
if (handle_smtp_report(ctl, msg) != PS_REFUSED)
{
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
return(FALSE);
}
else
{
report(stderr, GT_("SMTP listener refused delivery\n"));
SMTP_rset(ctl->smtp_socket, ctl->smtphostmode);
return(TRUE);
}
}
if (ctl->smtphostmode == LMTP_MODE)
{
if (lmtp_responses == 0)
{
SMTP_ok(ctl->smtp_socket, ctl->smtphostmode, TIMEOUT_EOM);
if (atoi(smtp_response) == 503)
report(stderr, GT_("LMTP delivery error on EOM\n"));
else
report(stderr,
GT_("Unexpected non-503 response to LMTP EOM: %s\n"),
smtp_response);
return(FALSE);
}
else
{
int i, errors, rc = FALSE;
char **responses;
responses = (char **)xmalloc(sizeof(char *) * lmtp_responses);
for (errors = i = 0; i < lmtp_responses; i++)
{
if ((smtp_err = SMTP_ok(ctl->smtp_socket, ctl->smtphostmode, TIMEOUT_EOM))
== SM_UNRECOVERABLE)
{
smtp_close(ctl, 0);
goto unrecov;
}
if (smtp_err != SM_OK)
{
responses[errors] = xstrdup(smtp_response);
errors++;
}
}
if (errors == 0)
rc = TRUE;
else
rc = send_bouncemail(ctl, msg, XMIT_ACCEPT,
"LMTP partial delivery failure.\r\n",
errors, responses);
unrecov:
for (i = 0; i < errors; i++)
free(responses[i]);
free(responses);
return rc;
}
}
}
return(TRUE);
}
int open_warning_by_mail(struct query *ctl)
{
int good, bad;
struct msgblk reply = {NULL, NULL, "FETCHMAIL-DAEMON@", 0, 0};
int status;
strlcat(reply.return_path, ctl->smtpaddress ? ctl->smtpaddress :
fetchmailhost, sizeof(reply.return_path));
if (!MULTIDROP(ctl))
{
save_str(&reply.recipients, ctl->localnames->id, XMIT_ACCEPT);
status = open_sink(ctl, &reply, &good, &bad);
free_str_list(&reply.recipients);
}
else
status = open_sink(ctl, &reply, &good, &bad);
if (status == 0) {
stuff_warning(NULL, ctl, "From: FETCHMAIL-DAEMON@%s",
ctl->smtpaddress ? ctl->smtpaddress : fetchmailhost);
stuff_warning(NULL, ctl, "Date: %s", rfc822timestamp());
stuff_warning(NULL, ctl, "MIME-Version: 1.0");
stuff_warning(NULL, ctl, "Content-Transfer-Encoding: 8bit");
stuff_warning(NULL, ctl, "Content-Type: text/plain; charset=\"%s\"", iana_charset);
}
return(status);
}
#if defined(HAVE_STDARG_H)
void stuff_warning(const char *rfc2047charset, struct query *ctl, const char *fmt, ... )
#else
void stuff_warning(rfc2047charset, ctl, fmt, va_alist)
const char *charset;
struct query *ctl;
const char *fmt;
va_dcl
#endif
{
char buf[2*MSGBUFSIZE+4];
va_list ap;
#if defined(HAVE_STDARG_H)
va_start(ap, fmt) ;
#else
va_start(ap);
#endif
vsnprintf(buf, sizeof(buf) - 2, fmt, ap);
va_end(ap);
snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "\r\n");
buf[MSGBUFSIZE+1] = '\r';
buf[MSGBUFSIZE+2] = '\n';
buf[MSGBUFSIZE+3] = '\0';
stuffline(ctl, rfc2047charset != NULL ? rfc2047e(buf, rfc2047charset) : buf);
}
void close_warning_by_mail(struct query *ctl, struct msgblk *msg)
{
stuff_warning(NULL, ctl, GT_("-- \nThe Fetchmail Daemon"));
close_sink(ctl, msg, TRUE);
}