Add dontreuseaddr parameter

include/sipp.hpp

@@ -424,6 +424,7 @@ MAYBE_EXTERN int           reset_number                 DEFVAL(0);
 MAYBE_EXTERN bool          reset_close                  DEFVAL(true);
 MAYBE_EXTERN int           reset_sleep                  DEFVAL(1000);
 MAYBE_EXTERN bool          sendbuffer_warn              DEFVAL(false);
+MAYBE_EXTERN bool          dontreuseaddr                DEFVAL(false);
 /* A list of sockets pending reset. */
 MAYBE_EXTERN set<SIPpSocket*> sockets_pending_reset;
 

src/sipp.cpp

@@ -164,6 +164,7 @@ struct sipp_option options_table[] = {
         "- cn: un + compression (only if compression plugin loaded).  This plugin is not provided with SIPp.\n"
         , SIPP_OPTION_TRANSPORT, NULL, 1
     },
+    {"dontreuseaddr", "Do not reuse TCP ports. Might be important in multi-socket mode (see -t parameter) in order to allow higher amount of calls.", SIPP_OPTION_SETFLAG, &dontreuseaddr, 1},
     {"i", "Set the local IP address for 'Contact:','Via:', and 'From:' headers. Default is primary host IP address.\n", SIPP_OPTION_IP, local_ip, 1},
     {"p", "Set the local port number.  Default is a random free port chosen by the system.", SIPP_OPTION_INT, &user_port, 1},
     {"bind_local", "Bind socket to local IP address, i.e. the local IP address is used as the source IP address.  If SIPp runs in server mode it will only listen on the local IP address instead of all IP addresses.", SIPP_OPTION_SETFLAG, &bind_local, 1},

src/socket.cpp

@@ -1733,9 +1733,11 @@ void sipp_customize_socket(SIPpSocket *socket)
             socket->ss_transport == T_SCTP) {
         int sock_opt = 1;
 
-        if (setsockopt(socket->ss_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&sock_opt,
-                       sizeof (sock_opt)) == -1) {
-            ERROR_NO("setsockopt(SO_REUSEADDR) failed");
+        if (dontreuseaddr == false) {
+                if (setsockopt(socket->ss_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&sock_opt,
+                               sizeof (sock_opt)) == -1) {
+                    ERROR_NO("setsockopt(SO_REUSEADDR) failed");
+                }
         }
 
 #ifdef USE_SCTP