moved error reply string to #define

core/AmSessionContainer.cpp

@@ -292,7 +292,7 @@ void AmSessionContainer::startSessionUAS(AmSipRequest& req)
 	if (!addSession(req.callid,req.from_tag,local_tag,session)) {
 	  ERROR("adding session to session container\n");
 	  delete session;
-	  throw string("internal server error");
+	  throw string(SIP_REPLY_SERVER_INTERNAL_ERROR);
 	}
 
 	MONITORING_LOG5(local_tag.c_str(), 
@@ -380,7 +380,7 @@ AmSession* AmSessionContainer::createSession(AmSipRequest& req,
   if(!session_factory) {
 
       ERROR("No session factory for application\n");
-      AmSipDialog::reply_error(req,500,"Server Internal Error");
+      AmSipDialog::reply_error(req,500,SIP_REPLY_SERVER_INTERNAL_ERROR);
 
       return NULL;
   }

core/AmSipDialog.cpp

@@ -90,12 +90,12 @@ void AmSipDialog::updateStatus(const AmSipRequest& req)
   if (r_cseq_i && req.cseq <= r_cseq){
     INFO("remote cseq lower than previous ones - refusing request\n");
     // see 12.2.2
-    reply_error(req, 500, "Server Internal Error");
+    reply_error(req, 500, SIP_REPLY_SERVER_INTERNAL_ERROR);
     return;
   }
 
   if ((req.method == "INVITE") && pending_invites) {      
-    reply_error(req,500,"Server Internal Error",
+    reply_error(req,500, SIP_REPLY_SERVER_INTERNAL_ERROR,
 		"Retry-After: " + int2str(get_random() % 10) + CRLF);
     return;
   }

core/AmSipHeaders.h

@@ -46,4 +46,6 @@
 #define SIP_IS_200_CLASS(code)  ((code >= 200) && (code < 300))
 
 #define SIP_APPLICATION_SDP     "application/sdp"
+
+#define SIP_REPLY_SERVER_INTERNAL_ERROR "Server Internal Error"
 #endif /* __AMSIPHEADERS_H__ */