Experimental: ESMTP LIMITS extension

[exim.git] / src / src / smtp_in.c

diff --git a/src/src/smtp_in.c b/src/src/smtp_in.c
index 03085c9e4b2f7faf6fec37a2fbf341084dbb8125..d60e7d5c5eec87acf701fa8e3809056c616bcc97 100644 (file)
--- a/src/src/smtp_in.c
+++ b/src/src/smtp_in.c
@@ -2109,7 +2109,11 @@ while (acl_warn_logged)
   acl_warn_logged = acl_warn_logged->next;
   store_free(this);
   }
+
+message_tidyup();
 store_reset(reset_point);
+
+message_start();
 return store_mark();
 }
 
@@ -2186,7 +2190,7 @@ while (done <= 0)
 
     case MAIL_CMD:
       smtp_mailcmd_count++;              /* Count for no-mail log */
-      if (sender_address != NULL)
+      if (sender_address)
        /* The function moan_smtp_batch() does not return. */
        moan_smtp_batch(smtp_cmd_buffer, "503 Sender already given");
 
@@ -3843,9 +3847,18 @@ if (*user_msgp)
 else
   smtp_printf("221 %s closing connection\r\n", FALSE, smtp_active_hostname);
 
-#ifndef DISABLE_TLS
+#ifdef SERVERSIDE_CLOSE_NOWAIT
+# ifndef DISABLE_TLS
+tls_close(NULL, TLS_SHUTDOWN_NOWAIT);
+# endif
+
+log_write(L_smtp_connection, LOG_MAIN, "%s closed by QUIT",
+  smtp_get_connection_info());
+#else
+
+# ifndef DISABLE_TLS
 tls_close(NULL, TLS_SHUTDOWN_WAIT);
-#endif
+# endif
 
 log_write(L_smtp_connection, LOG_MAIN, "%s closed by QUIT",
   smtp_get_connection_info());
@@ -3862,6 +3875,7 @@ The socket should become readble (though with no data) */
   FD_SET(fd, &fds);
   (void) select(fd + 1, (SELECT_ARG2_TYPE *)&fds, NULL, NULL, &t_limit);
   }
+#endif /*!DAEMON_CLOSE_NOWAIT*/
 }
 
 
@@ -3875,6 +3889,13 @@ cmd_list[CMD_LIST_RSET].is_mail_cmd = FALSE;
 }
 
 
+static int
+expand_mailmax(const uschar * s)
+{
+if (!(s = expand_cstring(s)))
+  log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand smtp_accept_max_per_connection");
+return *s ? Uatoi(s) : 0;
+}
 
 /*************************************************
 *       Initialize for SMTP incoming message     *
@@ -3905,6 +3926,7 @@ int
 smtp_setup_msg(void)
 {
 int done = 0;
+int mailmax = -1;
 BOOL toomany = FALSE;
 BOOL discarded = FALSE;
 BOOL last_was_rej_mail = FALSE;
@@ -4262,6 +4284,9 @@ while (done <= 0)
       fl.smtputf8_advertised = FALSE;
 #endif
 
+      /* Expand the per-connection message count limit option */
+      mailmax = expand_mailmax(smtp_accept_max_per_connection);
+
       smtp_code = US"250 ";        /* Default response code plus space*/
       if (!user_msg)
        {
@@ -4321,6 +4346,19 @@ while (done <= 0)
          g = string_catn(g, US"-SIZE\r\n", 7);
          }
 
+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+       if (  (mailmax > 0 || recipients_max)
+          && verify_check_host(&limits_advertise_hosts) == OK)
+         {
+         g = string_fmt_append(g, "%.3s-LIMITS", smtp_code);
+         if (mailmax > 0)
+           g = string_fmt_append(g, " MAILMAX=%d", mailmax);
+         if (recipients_max)
+           g = string_fmt_append(g, " RCPTMAX=%d", recipients_max);
+         g = string_catn(g, US"\r\n", 2);
+         }
+#endif
+
        /* Exim does not do protocol conversion or data conversion. It is 8-bit
        clean; if it has an 8-bit character in its hand, it just sends it. It
        cannot therefore specify 8BITMIME and remain consistent with the RFCs.
@@ -4533,16 +4571,20 @@ while (done <= 0)
     case MAIL_CMD:
       HAD(SCH_MAIL);
       smtp_mailcmd_count++;              /* Count for limit and ratelimit */
+      message_start();
       was_rej_mail = TRUE;               /* Reset if accepted */
       env_mail_type_t * mail_args;       /* Sanity check & validate args */
 
-      if (fl.helo_required && !fl.helo_seen)
-       {
-       smtp_printf("503 HELO or EHLO required\r\n", FALSE);
-       log_write(0, LOG_MAIN|LOG_REJECT, "rejected MAIL from %s: no "
-         "HELO/EHLO given", host_and_ident(FALSE));
-       break;
-       }
+      if (!fl.helo_seen)
+       if (fl.helo_required)
+         {
+         smtp_printf("503 HELO or EHLO required\r\n", FALSE);
+         log_write(0, LOG_MAIN|LOG_REJECT, "rejected MAIL from %s: no "
+           "HELO/EHLO given", host_and_ident(FALSE));
+         break;
+         }
+       else if (mailmax < 0)
+         mailmax = expand_mailmax(smtp_accept_max_per_connection);
 
       if (sender_address)
        {
@@ -4561,8 +4603,7 @@ while (done <= 0)
       /* Check to see if the limit for messages per connection would be
       exceeded by accepting further messages. */
 
-      if (smtp_accept_max_per_connection > 0 &&
-         smtp_mailcmd_count > smtp_accept_max_per_connection)
+      if (mailmax > 0 && smtp_mailcmd_count > mailmax)
        {
        smtp_printf("421 too many messages in this connection\r\n", FALSE);
        log_write(0, LOG_MAIN|LOG_REJECT, "rejected MAIL command %s: too many "