Experimental: ESMTP LIMITS extension

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

diff --git a/src/src/transport.c b/src/src/transport.c
index 31edb96929f06c714bfb8143188d136101d5add5..d8fd8585523abcd4d25f61401ee538101aaefe28 100644 (file)
--- a/src/src/transport.c
+++ b/src/src/transport.c
@@ -1880,9 +1880,21 @@ void
 transport_do_pass_socket(const uschar *transport_name, const uschar *hostname,
   const uschar *hostaddress, uschar *id, int socket_fd)
 {
-int i = 22;
+int i = 13;
 const uschar **argv;
 
+#ifndef DISABLE_TLS
+if (smtp_peer_options & OPTION_TLS) i += 6;
+#endif
+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+if (continue_limit_mail || continue_limit_rcpt || continue_limit_rcptdom)
+                                   i += 4;
+#endif
+if (queue_run_pid != (pid_t)0)     i += 3;
+#ifdef SUPPORT_SOCKS
+if (proxy_session)                 i += 5;
+#endif
+
 /* Set up the calling arguments; use the standard function for the basics,
 but we have a number of extras that may be added. */
 
@@ -1916,6 +1928,16 @@ if (smtp_peer_options & OPTION_TLS)
     argv[i++] = US"-MCT";
 #endif
 
+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+if (continue_limit_rcpt || continue_limit_rcptdom)
+  {
+  argv[i++] = US"-MCL";
+  argv[i++] = string_sprintf("%u", continue_limit_mail);
+  argv[i++] = string_sprintf("%u", continue_limit_rcpt);
+  argv[i++] = string_sprintf("%u", continue_limit_rcptdom);
+  }
+#endif
+
 if (queue_run_pid != (pid_t)0)
   {
   argv[i++] = US"-MCQ";
@@ -1923,6 +1945,17 @@ if (queue_run_pid != (pid_t)0)
   argv[i++] = string_sprintf("%d", queue_run_pipe);
   }
 
+#ifdef SUPPORT_SOCKS
+if (proxy_session)
+  {
+  argv[i++] = US"-MCp";
+  argv[i++] = proxy_local_address;
+  argv[i++] = string_sprintf("%d", proxy_local_port);
+  argv[i++] = proxy_external_address;
+  argv[i++] = string_sprintf("%d", proxy_external_port);
+  }
+#endif
+
 argv[i++] = US"-MC";
 argv[i++] = US transport_name;
 argv[i++] = US hostname;
@@ -1965,13 +1998,23 @@ Returns:          FALSE if fork fails; TRUE otherwise
 
 BOOL
 transport_pass_socket(const uschar *transport_name, const uschar *hostname,
-  const uschar *hostaddress, uschar *id, int socket_fd)
+  const uschar *hostaddress, uschar *id, int socket_fd
+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+  , unsigned peer_limit_mail, unsigned peer_limit_rcpt, unsigned peer_limit_rcptdom
+#endif
+  )
 {
 pid_t pid;
 int status;
 
 DEBUG(D_transport) debug_printf("transport_pass_socket entered\n");
 
+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+continue_limit_mail = peer_limit_mail;
+continue_limit_rcpt = peer_limit_rcpt;
+continue_limit_rcptdom = peer_limit_rcptdom;
+#endif
+
 if ((pid = exim_fork(US"continued-transport-interproc")) == 0)
   {
   /* Disconnect entirely from the parent process. If we are running in the
@@ -2236,12 +2279,12 @@ if (expand_arguments)
         }
 
       /* If we are not just able to replace the slot that contained
-       * $address_pipe (address_pipe_argcount == 1)
-       * We have to move the existing argv by address_pipe_argcount - 1
-       * Visually if address_pipe_argcount == 2:
-       * [argv 0][argv 1][argv 2($address_pipe)][argv 3][0]
-       * [argv 0][argv 1][ap_arg0][ap_arg1][old argv 3][0]
-       */
+      $address_pipe (address_pipe_argcount == 1)
+      We have to move the existing argv by address_pipe_argcount - 1
+      Visually if address_pipe_argcount == 2:
+      [argv 0][argv 1][argv 2($address_pipe)][argv 3][0]
+      [argv 0][argv 1][ap_arg0][ap_arg1][old argv 3][0] */
+
       if (address_pipe_argcount > 1)
         memmove(
           /* current position + additional args */
@@ -2253,15 +2296,12 @@ if (expand_arguments)
         );
 
       /* Now we fill in the slots we just moved argv out of
-       * [argv 0][argv 1][argv 2=pipeargv[0]][argv 3=pipeargv[1]][old argv 3][0]
-       */
+      [argv 0][argv 1][argv 2=pipeargv[0]][argv 3=pipeargv[1]][old argv 3][0] */
+
       for (int address_pipe_i = 0;
            address_pipe_argv[address_pipe_i] != US 0;
-           address_pipe_i++)
-        {
+           address_pipe_i++, argcount++)
         argv[i++] = address_pipe_argv[address_pipe_i];
-        argcount++;
-        }
 
       /* Subtract one since we replace $address_pipe */
       argcount--;