X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/f2ed27cf5f913cc437401c7e005c2886b7dc1a55..ee8b809061baea861fc87c41bcb72a62d76b0047:/src/src/daemon.c diff --git a/src/src/daemon.c b/src/src/daemon.c index 16e8bbacb..1a15d46c0 100644 --- a/src/src/daemon.c +++ b/src/src/daemon.c @@ -2,7 +2,7 @@ * Exim - an Internet mail transport agent * *************************************************/ -/* Copyright (c) University of Cambridge 1995 - 2017 */ +/* Copyright (c) University of Cambridge 1995 - 2018 */ /* See the file NOTICE for conditions of use and distribution. */ /* Functions concerned with running Exim as a daemon */ @@ -143,10 +143,8 @@ union sockaddr_46 interface_sockaddr; EXIM_SOCKLEN_T ifsize = sizeof(interface_sockaddr); int dup_accept_socket = -1; int max_for_this_host = 0; -int wfsize = 0; -int wfptr = 0; int save_log_selector = *log_selector; -uschar *whofrom = NULL; +gstring * whofrom; void *reset_point = store_get(0); @@ -201,17 +199,16 @@ DEBUG(D_interface) debug_printf("interface address=%s port=%d\n", the local interface data. This is for logging; at the end of this function the memory is reclaimed. */ -whofrom = string_append(whofrom, &wfsize, &wfptr, 3, "[", sender_host_address, "]"); +whofrom = string_append(NULL, 3, "[", sender_host_address, "]"); if (LOGGING(incoming_port)) - whofrom = string_append(whofrom, &wfsize, &wfptr, 2, ":", string_sprintf("%d", - sender_host_port)); + whofrom = string_append(whofrom, 2, ":", string_sprintf("%d", sender_host_port)); if (LOGGING(incoming_interface)) - whofrom = string_append(whofrom, &wfsize, &wfptr, 4, " I=[", + whofrom = string_append(whofrom, 4, " I=[", interface_address, "]:", string_sprintf("%d", interface_port)); -whofrom[wfptr] = 0; /* Terminate the newly-built string */ +(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 @@ -225,7 +222,7 @@ if (smtp_accept_max > 0 && smtp_accept_count >= smtp_accept_max) "please try again later.\r\n", FALSE); log_write(L_connection_reject, LOG_MAIN, "Connection from %s refused: too many connections", - whofrom); + whofrom->s); goto ERROR_RETURN; } @@ -244,7 +241,7 @@ if (smtp_load_reserve >= 0) smtp_printf("421 Too much load; please try again later.\r\n", FALSE); log_write(L_connection_reject, LOG_MAIN, "Connection from %s refused: load average = %.2f", - whofrom, (double)load_average/1000.0); + whofrom->s, (double)load_average/1000.0); goto ERROR_RETURN; } } @@ -262,9 +259,9 @@ if (smtp_accept_max_per_host != NULL) uschar *expanded = expand_string(smtp_accept_max_per_host); if (expanded == NULL) { - if (!expand_string_forcedfail) + if (!f.expand_string_forcedfail) log_write(0, LOG_MAIN|LOG_PANIC, "expansion of smtp_accept_max_per_host " - "failed for %s: %s", whofrom, expand_string_message); + "failed for %s: %s", whofrom->s, expand_string_message); } /* For speed, interpret a decimal number inline here */ else @@ -274,7 +271,7 @@ if (smtp_accept_max_per_host != NULL) max_for_this_host = max_for_this_host * 10 + *s++ - '0'; if (*s != 0) log_write(0, LOG_MAIN|LOG_PANIC, "expansion of smtp_accept_max_per_host " - "for %s contains non-digit: %s", whofrom, expanded); + "for %s contains non-digit: %s", whofrom->s, expanded); } } @@ -315,7 +312,7 @@ if ((max_for_this_host > 0) && "from this IP address; please try again later.\r\n", FALSE); log_write(L_connection_reject, LOG_MAIN, "Connection from %s refused: too many connections " - "from that IP address", whofrom); + "from that IP address", whofrom->s); goto ERROR_RETURN; } } @@ -341,7 +338,7 @@ if (LOGGING(smtp_connection)) save_log_selector &= ~L_smtp_connection; else log_write(L_smtp_connection, LOG_MAIN, "SMTP connection from %s " - "(TCP/IP connection count = %d)", whofrom, smtp_accept_count + 1); + "(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 @@ -390,7 +387,7 @@ if (pid == 0) uschar * nah = expand_string(raw_active_hostname); if (!nah) { - if (!expand_string_forcedfail) + if (!f.expand_string_forcedfail) { log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand \"%s\" " "(smtp_active_hostname): %s", raw_active_hostname, @@ -444,7 +441,7 @@ if (pid == 0) finding the id, but turn it on again afterwards so that information about the incoming connection is output. */ - if (debug_daemon) debug_selector = 0; + if (f.debug_daemon) debug_selector = 0; verify_get_ident(IDENT_PORT); host_build_sender_fullhost(); debug_selector = save_debug_selector; @@ -456,7 +453,7 @@ if (pid == 0) /* Now disable debugging permanently if it's required only for the daemon process. */ - if (debug_daemon) debug_selector = 0; + if (f.debug_daemon) debug_selector = 0; /* If there are too many child processes for immediate delivery, set the session_local_queue_only flag, which is initialized from the @@ -566,18 +563,13 @@ if (pid == 0) /* Reclaim up the store used in accepting this message */ - return_path = sender_address = NULL; - authenticated_sender = NULL; - sending_ip_address = NULL; - deliver_host_address = deliver_host = - deliver_domain_orig = deliver_localpart_orig = NULL; - dnslist_domain = dnslist_matched = NULL; - callout_address = NULL; -#ifndef DISABLE_DKIM - dkim_cur_signer = NULL; -#endif - acl_var_m = NULL; - store_reset(reset_point); + { + int r = receive_messagecount; + BOOL q = f.queue_only_policy; + smtp_reset(reset_point); + f.queue_only_policy = q; + receive_messagecount = r; + } /* If queue_only is set or if there are too many incoming connections in existence, session_local_queue_only will be TRUE. If it is not, check @@ -637,7 +629,7 @@ if (pid == 0) If we are not root, we have to re-exec exim unless deliveries are being done unprivileged. */ - else if (!queue_only_policy && !deliver_freeze) + else if (!f.queue_only_policy && !f.deliver_freeze) { pid_t dpid; @@ -656,7 +648,7 @@ if (pid == 0) the data structures if necessary. */ #ifdef SUPPORT_TLS - tls_close(TRUE, FALSE); + tls_close(NULL, TLS_NO_SHUTDOWN); #endif /* Reset SIGHUP and SIGCHLD in the child in both cases. */ @@ -935,7 +927,7 @@ debugging lines get the pid added. */ DEBUG(D_any|D_v) debug_selector |= D_pid; -if (inetd_wait_mode) +if (f.inetd_wait_mode) { listen_socket_count = 1; listen_sockets = store_get(sizeof(int)); @@ -974,7 +966,7 @@ if (inetd_wait_mode) } -if (inetd_wait_mode || daemon_listen) +if (f.inetd_wait_mode || f.daemon_listen) { /* If any option requiring a load average to be available during the reception of a message is set, call os_getloadavg() while we are root @@ -1056,7 +1048,7 @@ The preparation code decodes options and sets up the relevant data. We do this first, so that we can return non-zero if there are any syntax errors, and also write to stderr. */ -if (daemon_listen && !inetd_wait_mode) +if (f.daemon_listen && !f.inetd_wait_mode) { int *default_smtp_port; int sep; @@ -1072,14 +1064,10 @@ if (daemon_listen && !inetd_wait_mode) that contain neither a dot nor a colon are used to override daemon_smtp_port. Any other items are used to override local_interfaces. */ - if (override_local_interfaces != NULL) + if (override_local_interfaces) { - uschar *new_smtp_port = NULL; - uschar *new_local_interfaces = NULL; - int portsize = 0; - int portptr = 0; - int ifacesize = 0; - int ifaceptr = 0; + gstring * new_smtp_port = NULL; + gstring * new_local_interfaces = NULL; if (override_pid_file_path == NULL) write_pid = FALSE; @@ -1088,46 +1076,34 @@ if (daemon_listen && !inetd_wait_mode) while ((s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))) { uschar joinstr[4]; - uschar **ptr; - int *sizeptr; - int *ptrptr; + gstring ** gp; if (Ustrpbrk(s, ".:") == NULL) - { - ptr = &new_smtp_port; - sizeptr = &portsize; - ptrptr = &portptr; - } + gp = &new_smtp_port; else - { - ptr = &new_local_interfaces; - sizeptr = &ifacesize; - ptrptr = &ifaceptr; - } + gp = &new_local_interfaces; - if (*ptr == NULL) + if (!*gp) { joinstr[0] = sep; joinstr[1] = ' '; - *ptr = string_catn(*ptr, sizeptr, ptrptr, US"<", 1); + *gp = string_catn(*gp, US"<", 1); } - *ptr = string_catn(*ptr, sizeptr, ptrptr, joinstr, 2); - *ptr = string_cat (*ptr, sizeptr, ptrptr, s); + *gp = string_catn(*gp, joinstr, 2); + *gp = string_cat (*gp, s); } - if (new_smtp_port != NULL) + if (new_smtp_port) { - new_smtp_port[portptr] = 0; - daemon_smtp_port = new_smtp_port; + daemon_smtp_port = string_from_gstring(new_smtp_port); DEBUG(D_any) debug_printf("daemon_smtp_port overridden by -oX:\n %s\n", daemon_smtp_port); } - if (new_local_interfaces != NULL) + if (new_local_interfaces) { - new_local_interfaces[ifaceptr] = 0; - local_interfaces = new_local_interfaces; + local_interfaces = string_from_gstring(new_local_interfaces); local_iface_source = US"-oX data"; DEBUG(D_any) debug_printf("local_interfaces overridden by -oX:\n %s\n", local_interfaces); @@ -1173,7 +1149,7 @@ if (daemon_listen && !inetd_wait_mode) while ((s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))) if (!isdigit(*s)) { - int size = 0, len = 0; + gstring * g = NULL; list = tls_in.on_connect_ports; tls_in.on_connect_ports = NULL; @@ -1187,9 +1163,10 @@ if (daemon_listen && !inetd_wait_mode) log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "TCP port \"%s\" not found", s); s = string_sprintf("%d", (int)ntohs(smtp_service->s_port)); } - tls_in.on_connect_ports = string_append_listele(tls_in.on_connect_ports, - &size, &len, ':', s); + g = string_append_listele(g, ':', s); } + if (g) + tls_in.on_connect_ports = g->s; break; } @@ -1293,7 +1270,7 @@ if (daemon_listen && !inetd_wait_mode) } /* daemon_listen but not inetd_wait_mode */ -if (daemon_listen) +if (f.daemon_listen) { /* Do a sanity check on the max connects value just to save us from getting @@ -1333,7 +1310,7 @@ Then disconnect from the controlling terminal, Most modern Unixes seem to have setsid() for getting rid of the controlling terminal. For any OS that doesn't, setsid() can be #defined as a no-op, or as something else. */ -if (background_daemon || inetd_wait_mode) +if (f.background_daemon || f.inetd_wait_mode) { log_close_all(); /* Just in case anything was logged earlier */ search_tidyup(); /* Just in case any were used in reading the config. */ @@ -1344,7 +1321,7 @@ if (background_daemon || inetd_wait_mode) log_stderr = NULL; /* So no attempt to copy paniclog output */ } -if (background_daemon) +if (f.background_daemon) { /* If the parent process of this one has pid == 1, we are re-initializing the daemon as the result of a SIGHUP. In this case, there is no need to do @@ -1365,7 +1342,7 @@ if (background_daemon) /* We are now in the disconnected, daemon process (unless debugging). Set up the listening sockets if required. */ -if (daemon_listen && !inetd_wait_mode) +if (f.daemon_listen && !f.inetd_wait_mode) { int sk; ip_address_item *ipa; @@ -1411,7 +1388,7 @@ if (daemon_listen && !inetd_wait_mode) #ifdef IPV6_V6ONLY if (af == AF_INET6 && wildcard && - setsockopt(listen_sockets[sk], IPPROTO_IPV6, IPV6_V6ONLY, (char *)(&on), + setsockopt(listen_sockets[sk], IPPROTO_IPV6, IPV6_V6ONLY, CS (&on), sizeof(on)) < 0) log_write(0, LOG_MAIN, "Setting IPV6_V6ONLY on daemon's IPv6 wildcard " "socket failed (%s): carrying on without it", strerror(errno)); @@ -1422,7 +1399,7 @@ if (daemon_listen && !inetd_wait_mode) smtp port for listening. */ if (setsockopt(listen_sockets[sk], SOL_SOCKET, SO_REUSEADDR, - (uschar *)(&on), sizeof(on)) < 0) + US (&on), sizeof(on)) < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "setting SO_REUSEADDR on socket " "failed when starting daemon: %s", strerror(errno)); @@ -1430,7 +1407,7 @@ if (daemon_listen && !inetd_wait_mode) disable this because it breaks some broken clients. */ if (tcp_nodelay) setsockopt(listen_sockets[sk], IPPROTO_TCP, TCP_NODELAY, - (uschar *)(&on), sizeof(on)); + US (&on), sizeof(on)); /* Now bind the socket to the required port; if Exim is being restarted it may not always be possible to bind immediately, even with SO_REUSEADDR @@ -1443,7 +1420,7 @@ if (daemon_listen && !inetd_wait_mode) listen() stage instead. */ #ifdef TCP_FASTOPEN - tcp_fastopen_ok = TRUE; + f.tcp_fastopen_ok = TRUE; #endif for(;;) { @@ -1481,19 +1458,32 @@ if (daemon_listen && !inetd_wait_mode) else debug_printf("listening on %s port %d\n", ipa->address, ipa->port); -#ifdef TCP_FASTOPEN - if (setsockopt(listen_sockets[sk], IPPROTO_TCP, TCP_FASTOPEN, +#if defined(TCP_FASTOPEN) && !defined(__APPLE__) + if ( f.tcp_fastopen_ok + && setsockopt(listen_sockets[sk], IPPROTO_TCP, TCP_FASTOPEN, &smtp_connect_backlog, sizeof(smtp_connect_backlog))) { DEBUG(D_any) debug_printf("setsockopt FASTOPEN: %s\n", strerror(errno)); - tcp_fastopen_ok = FALSE; + f.tcp_fastopen_ok = FALSE; } #endif /* Start listening on the bound socket, establishing the maximum backlog of connections that is allowed. On success, continue to the next address. */ - if (listen(listen_sockets[sk], smtp_connect_backlog) >= 0) continue; + if (listen(listen_sockets[sk], smtp_connect_backlog) >= 0) + { +#if defined(TCP_FASTOPEN) && defined(__APPLE__) + if ( f.tcp_fastopen_ok + && setsockopt(listen_sockets[sk], IPPROTO_TCP, TCP_FASTOPEN, + &on, sizeof(on))) + { + DEBUG(D_any) debug_printf("setsockopt FASTOPEN: %s\n", strerror(errno)); + f.tcp_fastopen_ok = FALSE; + } +#endif + continue; + } /* Listening has failed. In an IPv6 environment, as for bind(), if listen() fails with the error EADDRINUSE and we are doing IPv4 wildcard listening @@ -1548,7 +1538,7 @@ automatically. Consequently, Exim 4 writes a pid file only The variable daemon_write_pid is used to control this. */ -if (running_in_test_harness || write_pid) +if (f.running_in_test_harness || write_pid) { FILE *f; @@ -1614,7 +1604,7 @@ sigalrm_seen = (queue_interval > 0); /* Log the start up of a daemon - at least one of listening or queue running must be set up. */ -if (inetd_wait_mode) +if (f.inetd_wait_mode) { uschar *p = big_buffer; @@ -1632,7 +1622,7 @@ if (inetd_wait_mode) sigalrm_seen = 1; } -else if (daemon_listen) +else if (f.daemon_listen) { int i, j; int smtp_ports = 0; @@ -1810,7 +1800,7 @@ for (;;) } sigalrm_seen = FALSE; - alarm(resignal_interval); + ALARM(resignal_interval); } else @@ -1835,7 +1825,7 @@ for (;;) leave the above message, because it ties up with the "child ended" debugging messages. */ - if (debug_daemon) debug_selector = 0; + if (f.debug_daemon) debug_selector = 0; /* Close any open listening sockets in the child */ @@ -1860,11 +1850,11 @@ for (;;) signal(SIGALRM, SIG_DFL); *p++ = '-'; *p++ = 'q'; - if (queue_2stage) *p++ = 'q'; - if (queue_run_first_delivery) *p++ = 'i'; - if (queue_run_force) *p++ = 'f'; - if (deliver_force_thaw) *p++ = 'f'; - if (queue_run_local) *p++ = 'l'; + if (f.queue_2stage) *p++ = 'q'; + if (f.queue_run_first_delivery) *p++ = 'i'; + if (f.queue_run_force) *p++ = 'f'; + if (f.deliver_force_thaw) *p++ = 'f'; + if (f.queue_run_local) *p++ = 'l'; *p = 0; extra[0] = queue_name ? string_sprintf("%sG%s", opt, queue_name) : opt; @@ -1874,13 +1864,13 @@ for (;;) if (deliver_selectstring) { - extra[extracount++] = deliver_selectstring_regex ? US"-Rr" : US"-R"; + extra[extracount++] = f.deliver_selectstring_regex ? US"-Rr" : US"-R"; extra[extracount++] = deliver_selectstring; } if (deliver_selectstring_sender) { - extra[extracount++] = deliver_selectstring_sender_regex + extra[extracount++] = f.deliver_selectstring_sender_regex ? US"-Sr" : US"-S"; extra[extracount++] = deliver_selectstring_sender; } @@ -1923,7 +1913,7 @@ for (;;) /* Reset the alarm clock */ sigalrm_seen = FALSE; - alarm(queue_interval); + ALARM(queue_interval); } } /* sigalrm_seen */ @@ -1938,7 +1928,7 @@ for (;;) new OS. In fact, the later addition of listening on specific interfaces only requires this way of working anyway. */ - if (daemon_listen) + if (f.daemon_listen) { int sk, lcount, select_errno; int max_socket = 0; @@ -2110,7 +2100,7 @@ for (;;) getpid()); for (sk = 0; sk < listen_socket_count; sk++) (void)close(listen_sockets[sk]); - alarm(0); + ALARM_CLR(0); signal(SIGHUP, SIG_IGN); sighup_argv[0] = exim_path; exim_nullstd();