* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) The Exim Maintainers 2020 - 2022 */
-/* Copyright (c) University of Cambridge 1995 - 2023 */
+/* Copyright (c) The Exim Maintainers 2020 - 2024 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
/* SPDX-License-Identifier: GPL-2.0-or-later */
uschar *emsg = was_errno <= 0
? US"" : string_sprintf(": %s", strerror(was_errno));
log_write(0, LOG_MAIN|LOG_PANIC, "%s%s", log_msg, emsg);
-if (smtp_out) smtp_printf("421 %s\r\n", FALSE, smtp_msg);
+if (smtp_out) smtp_printf("421 %s\r\n", SP_NO_MORE, smtp_msg);
}
*/
static void
-handle_smtp_call(struct pollfd *fd_polls, int listen_socket_count,
+handle_smtp_call(struct pollfd * fd_polls, int listen_socket_count,
int accept_socket, struct sockaddr *accepted)
{
pid_t pid;
{
log_write(0, LOG_MAIN | ((errno == ECONNRESET)? 0 : LOG_PANIC),
"getsockname() failed: %s", strerror(errno));
- smtp_printf("421 Local problem: getsockname() failed; please try again later\r\n", FALSE);
+ smtp_printf("421 Local problem: getsockname() failed; please try again later\r\n", SP_NO_MORE);
goto ERROR_RETURN;
}
whofrom = string_fmt_append(whofrom, " I=[%s]:%d",
interface_address, interface_port);
-(void) string_from_gstring(whofrom); /* Terminate the newly-built string */
-
/* Check maximum number of connections. We do not check for reserved
connections or unacceptable hosts here. That is done in the subprocess because
it might take some time. */
DEBUG(D_any) debug_printf("rejecting SMTP connection: count=%d max=%d\n",
smtp_accept_count, smtp_accept_max);
smtp_printf("421 Too many concurrent SMTP connections; "
- "please try again later.\r\n", FALSE);
+ "please try again later.\r\n", SP_NO_MORE);
log_write(L_connection_reject,
- LOG_MAIN, "Connection from %s refused: too many connections",
- whofrom->s);
+ LOG_MAIN, "Connection from %Y refused: too many connections",
+ whofrom);
goto ERROR_RETURN;
}
{
DEBUG(D_any) debug_printf("rejecting SMTP connection: load average = %.2f\n",
(double)load_average/1000.0);
- smtp_printf("421 Too much load; please try again later.\r\n", FALSE);
+ smtp_printf("421 Too much load; please try again later.\r\n", SP_NO_MORE);
log_write(L_connection_reject,
- LOG_MAIN, "Connection from %s refused: load average = %.2f",
- whofrom->s, (double)load_average/1000.0);
+ LOG_MAIN, "Connection from %Y refused: load average = %.2f",
+ whofrom, (double)load_average/1000.0);
goto ERROR_RETURN;
}
}
this is in the daemon mainline, only fast expansions (such as inline address
checks) should be used. The documentation is full of warnings. */
+GET_OPTION("smtp_accept_max_per_host");
if (smtp_accept_max_per_host)
{
- uschar *expanded = expand_string(smtp_accept_max_per_host);
+ uschar * expanded = expand_string(smtp_accept_max_per_host);
if (!expanded)
{
if (!f.expand_string_forcedfail)
log_write(0, LOG_MAIN|LOG_PANIC, "expansion of smtp_accept_max_per_host "
- "failed for %s: %s", whofrom->s, expand_string_message);
+ "failed for %Y: %s", whofrom, expand_string_message);
}
/* For speed, interpret a decimal number inline here */
else
{
- uschar *s = expanded;
+ uschar * s = expanded;
while (isdigit(*s))
max_for_this_host = max_for_this_host * 10 + *s++ - '0';
if (*s)
log_write(0, LOG_MAIN|LOG_PANIC, "expansion of smtp_accept_max_per_host "
- "for %s contains non-digit: %s", whofrom->s, expanded);
+ "for %Y contains non-digit: %s", whofrom, expanded);
}
}
-/* If we have fewer connections than max_for_this_host, we can skip the tedious
-per host_address checks. Note that at this stage smtp_accept_count contains the
-count of *other* connections, not including this one. */
+/* If we have fewer total connections than max_for_this_host, we can skip the
+tedious per host_address checks. Note that at this stage smtp_accept_count
+contains the count of *other* connections, not including this one. */
-if (max_for_this_host > 0 && smtp_accept_count >= max_for_this_host)
+if ( smtp_slots
+ && max_for_this_host > 0 && smtp_accept_count >= max_for_this_host)
{
int host_accept_count = 0;
int other_host_count = 0; /* keep a count of non matches to optimise */
"IP address: count=%d max=%d\n",
host_accept_count, max_for_this_host);
smtp_printf("421 Too many concurrent SMTP connections "
- "from this IP address; please try again later.\r\n", FALSE);
+ "from this IP address; please try again later.\r\n", SP_NO_MORE);
log_write(L_connection_reject,
- LOG_MAIN, "Connection from %s refused: too many connections "
- "from that IP address", whofrom->s);
+ LOG_MAIN, "Connection from %Y refused: too many connections "
+ "from that IP address", whofrom);
search_tidyup();
goto ERROR_RETURN;
}
}
-/* OK, the connection count checks have been passed. Before we can fork the
-accepting process, we must first log the connection if requested. This logging
-used to happen in the subprocess, but doing that means that the value of
-smtp_accept_count can be out of step by the time it is logged. So we have to do
-the logging here and accept the performance cost. Note that smtp_accept_count
-hasn't yet been incremented to take account of this connection.
-
-In order to minimize the cost (because this is going to happen for every
-connection), do a preliminary selector test here. This saves ploughing through
-the generalized logging code each time when the selector is false. If the
-selector is set, check whether the host is on the list for logging. If not,
-arrange to unset the selector in the subprocess. */
-
-if (LOGGING(smtp_connection))
- {
- uschar *list = hosts_connection_nolog;
- memset(sender_host_cache, 0, sizeof(sender_host_cache));
- if (list && verify_check_host(&list) == OK)
- save_log_selector &= ~L_smtp_connection;
- else
- log_write(L_smtp_connection, LOG_MAIN, "SMTP connection from %s "
- "(TCP/IP connection count = %d)", whofrom->s, smtp_accept_count + 1);
- }
-
-/* Now we can fork the accepting process; do a lookup tidy, just in case any
+/* OK, the connection count checks have been passed.
+Now we can fork the accepting process; do a lookup tidy, just in case any
expansion above did a lookup. */
search_tidyup();
#endif
smtp_accept_count++; /* So that it includes this process */
+ set_connection_id();
+
+ /* Log the connection if requested.
+ In order to minimize the cost (because this is going to happen for every
+ connection), do a preliminary selector test here. This saves ploughing through
+ the generalized logging code each time when the selector is false. If the
+ selector is set, check whether the host is on the list for logging. If not,
+ arrange to unset the selector in the subprocess.
+
+ jgh 2023/08/08 :- moved this logging in from the parent process, just
+ pre-fork. There was a claim back from 4.21 (when it was moved from
+ smtp_start_session()) that smtp_accept_count could have become out-of-date by
+ the time the child could log it, and I can't see how that could happen. */
+
+ if (LOGGING(smtp_connection))
+ {
+ uschar * list = hosts_connection_nolog;
+ memset(sender_host_cache, 0, sizeof(sender_host_cache));
+ if (list && verify_check_host(&list) == OK)
+ save_log_selector &= ~L_smtp_connection;
+ else if (LOGGING(connection_id))
+ log_write(L_smtp_connection, LOG_MAIN, "SMTP connection from %Y "
+ "Ci=%s (TCP/IP connection count = %d)",
+ whofrom, connection_id, smtp_accept_count);
+ else
+ log_write(L_smtp_connection, LOG_MAIN, "SMTP connection from %Y "
+ "(TCP/IP connection count = %d)", whofrom, smtp_accept_count);
+ }
/* If the listen backlog was over the monitoring level, log it. */
likely what it depends on.) */
smtp_active_hostname = primary_hostname;
+ GET_OPTION("smtp_active_hostname");
if (raw_active_hostname)
{
uschar * nah = expand_string(raw_active_hostname);
"(smtp_active_hostname): %s", raw_active_hostname,
expand_string_message);
smtp_printf("421 Local configuration error; "
- "please try again later.\r\n", FALSE);
+ "please try again later.\r\n", SP_NO_MORE);
mac_smtp_fflush();
search_tidyup();
exim_underbar_exit(EXIT_FAILURE);
smtp_log_no_mail(); /* Log no mail if configured */
exim_underbar_exit(EXIT_SUCCESS);
}
- if (message_id[0] == 0) continue; /* No message was accepted */
+ if (!message_id[0]) continue; /* No message was accepted */
}
else /* bad smtp_setup_msg() */
{
if (pid < 0)
never_error(US"daemon: accept process fork failed", US"Fork failed", errno);
-else
+else if (smtp_slots)
{
for (int i = 0; i < smtp_accept_max; ++i)
if (smtp_slots[i].pid <= 0)
{
DEBUG(D_any)
{
- debug_printf("child %d ended: status=0x%x\n", (int)pid, status);
+ debug_printf("child %ld ended: status=0x%x\n", (long)pid, status);
#ifdef WCOREDUMP
if (WIFEXITED(status))
debug_printf(" normal exit, %d\n", WEXITSTATUS(status));
if (smtp_slots)
{
int i;
- for (i = 0; i < smtp_accept_max; i++)
- if (smtp_slots[i].pid == pid)
+ smtp_slot * sp;
+ for (i = 0, sp = smtp_slots; i < smtp_accept_max; i++, sp++)
+ if (sp->pid == pid)
{
- if (smtp_slots[i].host_address)
- store_free(smtp_slots[i].host_address);
- smtp_slots[i] = empty_smtp_slot;
+ if (sp->host_address)
+ store_free(sp->host_address);
+ *sp = empty_smtp_slot;
if (--smtp_accept_count < 0) smtp_accept_count = 0;
DEBUG(D_any) debug_printf("%d SMTP accept process%s now running\n",
- smtp_accept_count, (smtp_accept_count == 1)? "" : "es");
+ smtp_accept_count, smtp_accept_count == 1 ? "" : "es");
break;
}
if (i < smtp_accept_max) continue; /* Found an accepting process */
operate_on_pid_file(const enum pid_op operation, const pid_t pid)
{
char pid_line[sizeof(int) * 3 + 2];
-const int pid_len = snprintf(pid_line, sizeof(pid_line), "%d\n", (int)pid);
+const int pid_len = snprintf(pid_line, sizeof(pid_line), "%ld\n", (long)pid);
BOOL lines_match = FALSE;
uschar * path, * base, * dir;
static void
daemon_die(void)
{
-int pid;
+pid_t pid;
DEBUG(D_any) debug_printf("SIGTERM/SIGINT seen\n");
#if !defined(DISABLE_TLS) && (defined(EXIM_HAVE_INOTIFY) || defined(EXIM_HAVE_KEVENT))
ssize_t
daemon_notifier_sockname(struct sockaddr_un * sup)
{
+GET_OPTION("notifier_socket");
#ifdef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
sup->sun_path[0] = 0; /* Abstract local socket addr - Linux-specific? */
return offsetof(struct sockaddr_un, sun_path) + 1
/* The notifier socket has something to read. Pull the message from it, decode
and do the action.
+*/
-Return TRUE if a sigalrm should be emulated */
-
-static BOOL
+static void
daemon_notification(void)
{
uschar buf[256], cbuf[256];
ssize_t sz;
buf[sizeof(buf)-1] = 0;
-if ((sz = recvmsg(daemon_notifier_fd, &msg, 0)) <= 0) return FALSE;
-if (sz >= sizeof(buf)) return FALSE;
+if ((sz = recvmsg(daemon_notifier_fd, &msg, 0)) <= 0) return;
+if (sz >= sizeof(buf)) return;
#ifdef notdef
debug_printf("addrlen %d\n", msg.msg_namelen);
struct ucred * cr = (struct ucred *) CMSG_DATA(cp);
if (cr->uid && cr->uid != exim_uid)
{
- DEBUG(D_queue_run) debug_printf("%s: sender creds pid %d uid %d gid %d\n",
- __FUNCTION__, (int)cr->pid, (int)cr->uid, (int)cr->gid);
+ DEBUG(D_queue_run) debug_printf("%s: sender creds pid %ld uid %d gid %d\n",
+ __FUNCTION__, (long)cr->pid, (int)cr->uid, (int)cr->gid);
}
# elif defined(LOCAL_CREDS) /* BSD-ish */
struct sockcred * cr = (struct sockcred *) CMSG_DATA(cp);
memcpy(queuerun_msgid, buf+1, MESSAGE_ID_LENGTH+1);
for (qrunner * q = qrunners; q; q = q->next)
- if (Ustrcmp(q->name, buf+1+MESSAGE_ID_LENGTH+1) == 0)
+ if (q->name
+ ? Ustrcmp(q->name, buf+1+MESSAGE_ID_LENGTH+1) == 0
+ : !buf[1+MESSAGE_ID_LENGTH+1]
+ )
{ queuerun_msg_qname = q->name; break; }
- return TRUE;
+ return;
#endif
case NOTIFY_QUEUE_SIZE_REQ:
regex_at_daemon(buf);
break;
}
-return FALSE;
+return;
}
if (sorted)
{
qrunner ** p = &sorted;
- for (qrunner * qq; qq = *p; p = &(qq->next))
+ for (qrunner * qq; qq = *p; p = &qq->next)
if ( q->next_tick < qq->next_tick
|| q->next_tick == qq->next_tick && q->interval < qq->interval
)
return qrunners ? qrunners->next_tick - time(NULL) : 0;
}
+/* See if we can do a queue run. If policy limit permit, kick one off.
+If both notification and timer events are present, handle the former
+and leave the timer outstanding.
+
+Return the number of seconds until the next due runner.
+*/
+
static int
daemon_qrun(int local_queue_run_max, struct pollfd * fd_polls, int listen_socket_count)
{
enough queue runners on the go. If we are not running as root, a re-exec is
required. In the calling process, restart the alamr timer for the next run. */
-if (is_multiple_qrun())
+if (is_multiple_qrun()) /* we are managing periodic runs */
if (local_queue_run_max <= 0 || queue_run_count < local_queue_run_max)
{
qrunner * q = NULL;
#ifndef DISABLE_QUEUE_RAMP
- if (*queuerun_msgid) /* See if we can start another runner for this queue */
+ /* If this is a triggered run for a specific message, see if we can start
+ another runner for this queue. */
+
+ if (*queuerun_msgid)
{
for (qrunner * qq = qrunners; qq; qq = qq->next)
if (qq->name == queuerun_msg_qname)
}
else
#endif
- /* In order of run priority, find the first queue for which we can start
- a runner */
+ /* Normal periodic run: in order of run priority, find the first queue
+ for which we can start a runner */
for (q = qrunners; q; q = q->next)
if (q->run_count < q->run_max) break;
- if (q)
+ if (q) /* found a queue to run */
{
pid_t pid;
}
}
-sigalrm_seen = FALSE;
+/* The queue run has been initiated (unless we were already running enough) */
+
#ifndef DISABLE_QUEUE_RAMP
-if (*queuerun_msgid) /* it was a fast-ramp kick */
+if (*queuerun_msgid) /* it was a fast-ramp kick; dealt with */
*queuerun_msgid = 0;
else /* periodic or one-time queue run */
#endif
- { /* Impose a minimum 1s tick, even when a run was outstanding */
+ /* Set up next timer callback. Impose a minimum 1s tick,
+ even when a run was outstanding */
+ {
int interval = next_qrunner_interval();
if (interval <= 0) interval = 1;
+ sigalrm_seen = FALSE;
if (qrunners) /* there are still periodic qrunners */
{
- ALARM(interval);
+ ALARM(interval); /* set up next qrun tick */
return interval;
}
}
-const uschar *
+static const uschar *
describe_queue_runners(void)
{
gstring * g = NULL;
for (qrunner * q = qrunners; q; q = q->next)
{
g = string_catn(g, US"-q", 2);
+ if (q->queue_2stage) g = string_catn(g, US"q", 1);
if (q->name) g = string_append(g, 3, US"G", q->name, US"/");
g = string_cat(g, readconf_printtime(q->interval));
g = string_catn(g, US" ", 1);
ip_address_item * addresses = NULL;
time_t last_connection_time = (time_t)0;
int local_queue_run_max = 0;
-BOOL queue_run_max_has_dollar;
if (is_multiple_qrun())
-
+ {
/* Nuber of runner-tracking structs needed: If the option queue_run_max has
no expandable elements then it is the overall maximum; else we assume it
depends on the queue name, and add them up to get the maximum.
Evaluate both that and the individual limits. */
+ GET_OPTION("queue_run_max");
if (Ustrchr(queue_run_max, '$') != NULL)
{
for (qrunner * q = qrunners; q; q = q->next)
for (qrunner * q = qrunners; q; q = q->next)
q->run_max = local_queue_run_max;
}
+ }
process_purpose = US"daemon";
tls_in.on_connect_ports = NULL;
sep = 0;
while ((s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
- {
- if (!isdigit(*s))
+ if (isdigit(*s))
+ g = string_append_listele(g, ':', s);
+ else
{
struct servent * smtp_service = getservbyname(CS s, "tcp");
if (!smtp_service)
log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "TCP port \"%s\" not found", s);
- s = string_sprintf("%d", (int)ntohs(smtp_service->s_port));
+ g = string_append_listele_fmt(g, ':', FALSE, "%d",
+ (int)ntohs(smtp_service->s_port));
}
- g = string_append_listele(g, ':', s);
- }
+
if (g)
tls_in.on_connect_ports = g->s;
break;
pid_t pid = exim_fork(US"daemon");
if (pid < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
"fork() failed when starting daemon: %s", strerror(errno));
- if (pid > 0) exit(EXIT_SUCCESS); /* in parent process, just exit */
+ if (pid > 0) exim_exit(EXIT_SUCCESS); /* in parent process, just exit */
(void)setsid(); /* release controlling terminal */
f.daemon_listen = daemon_listen;
}
sprintf(CS p, "with no wait timeout");
log_write(0, LOG_MAIN,
- "exim %s daemon started: pid=%d, launched with listening socket, %s",
+ "exim %s daemon started: pid=%ld, launched with listening socket, %s",
version_string, getpid(), big_buffer);
set_process_info("daemon(%s): pre-listening socket", version_string);
}
log_write(0, LOG_MAIN,
- "exim %s daemon started: pid=%d, %s, listening for %s",
+ "exim %s daemon started: pid=%ld, %s, listening for %s",
version_string, getpid(), qinfo, big_buffer);
set_process_info("daemon(%s): %s, listening for %s",
version_string, qinfo, big_buffer);
{
const uschar * s = describe_queue_runners();
log_write(0, LOG_MAIN,
- "exim %s daemon started: pid=%d, %s, not listening for SMTP",
+ "exim %s daemon started: pid=%ld, %s, not listening for SMTP",
version_string, getpid(), s);
set_process_info("daemon(%s): %s, not listening", version_string, s);
}
dns_pattern_init();
smtp_deliver_init(); /* Used for callouts */
-#ifndef DISABLE_DKIM
- {
-# ifdef MEASURE_TIMING
- struct timeval t0;
- gettimeofday(&t0, NULL);
-# endif
- dkim_exim_init();
-# ifdef MEASURE_TIMING
- report_time_since(&t0, US"dkim_exim_init (delta)");
-# endif
- }
-#endif
-
#ifdef WITH_CONTENT_SCAN
malware_init();
#endif
-#ifdef SUPPORT_SPF
-spf_init();
-#endif
#ifndef DISABLE_TLS
tls_daemon_init();
#endif
The other option is that we have an inetd wait timeout specified to -bw. */
- if (sigalrm_seen)
+ if (sigalrm_seen || *queuerun_msgid)
if (inetd_wait_timeout > 0)
daemon_inetd_wtimeout(last_connection_time); /* Might not return */
else
select() was interrupted so that we reap the child. This might still leave
a small window when a SIGCHLD could get lost. However, since we use SIGCHLD
only to do the reaping more quickly, it shouldn't result in anything other
- than a delay until something else causes a wake-up. */
+ than a delay until something else causes a wake-up.
+ For the normal case, wait for either a pollable fd (eg. new connection) or
+ or a SIGALRM (for a periodic queue run) */
if (sigchld_seen)
{
break; /* to top of daemon loop */
}
#endif
+ /* Handle the daemon-notifier socket. If it was a fast-ramp
+ notification then queuerun_msgid will have a nonzerolength string. */
+
if (dnotify_poll && dnotify_poll->revents & POLLIN)
{
dnotify_poll->revents = 0;
- sigalrm_seen = daemon_notification();
+ daemon_notification();
break; /* to top of daemon loop */
}
for (struct pollfd * p = fd_polls; p < fd_polls + listen_socket_count;
if (sighup_seen)
{
- log_write(0, LOG_MAIN, "pid %d: SIGHUP received: re-exec daemon",
+ log_write(0, LOG_MAIN, "pid %ld: SIGHUP received: re-exec daemon",
getpid());
close_daemon_sockets(daemon_notifier_fd, fd_polls, listen_socket_count);
unlink_notifier_socket();
sighup_argv[0] = exim_path;
exim_nullstd();
execv(CS exim_path, (char *const *)sighup_argv);
- log_write(0, LOG_MAIN|LOG_PANIC_DIE, "pid %d: exec of %s failed: %s",
+ log_write(0, LOG_MAIN|LOG_PANIC_DIE, "pid %ld: exec of %s failed: %s",
getpid(), exim_path, strerror(errno));
log_close_all();
}
git://git.exim.org / exim.git / blobdiff