allow network interface name for sip_ip* parameters.

core/AmConfig.cpp

@@ -778,6 +778,9 @@ int AmConfig::finalizeIPConfig()
     if (AmConfig::Ifs[i].LocalSIPIP.empty()) {
       AmConfig::Ifs[i].LocalSIPIP = AmConfig::Ifs[i].LocalIP;
     }
+    else {
+      AmConfig::Ifs[i].LocalSIPIP = getLocalIP(AmConfig::Ifs[i].LocalSIPIP);
+    }
     
     AmConfig::LocalSIPIP2If.insert(std::make_pair(AmConfig::Ifs[i].LocalSIPIP,i));
   }

core/etc/sems.conf.sample

@@ -30,7 +30,7 @@
 #  media_ip=10.0.0.34
 #  media_ip=eth0
 
-# optional parameter: sip_ip=<ip_address>
+# optional parameter: sip_ip=<ip_address>|<device>
 #
 # - this informs SEMS about the SIP IP where its SIP stack is 
 #   bound to or should be bound to. This also sets 
@@ -42,6 +42,7 @@
 #
 # Example:
 #  sip_ip=10.0.0.34
+#  sip_ip=en0
 #
 
 # optional parameter: public_ip=<ip_address>