skip some callbacks when session is not present

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10463 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia.c

@@ -2334,6 +2334,18 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 
   state_process:
 
+	switch ((enum nua_callstate) ss_state) {
+	case nua_callstate_terminated:
+	case nua_callstate_terminating:
+	case nua_callstate_ready:
+	case nua_callstate_completed:
+	case nua_callstate_received:
+		if (!(session && channel && tech_pvt)) goto done;
+		break;
+	default:
+		break;
+	}
+
 	switch ((enum nua_callstate) ss_state) {
 	case nua_callstate_init:
 		break;
@@ -2342,7 +2354,6 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 	case nua_callstate_calling:
 		break;
 	case nua_callstate_proceeding:
-		if (channel) {
 		if (status == 180) {
 			switch_channel_mark_ring_ready(channel);
 			if (!switch_channel_test_flag(channel, CF_GEN_RINGBACK)) {
@@ -2398,13 +2409,12 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 				goto done;
 			}
 		}
-		}
 		break;
 	case nua_callstate_completing:
 		nua_ack(nh, TAG_END());
 		break;
 	case nua_callstate_received:
-		if (tech_pvt && !switch_test_flag(tech_pvt, TFLAG_SDP)) {
+		if (!switch_test_flag(tech_pvt, TFLAG_SDP)) {
 			if (r_sdp && !switch_test_flag(tech_pvt, TFLAG_SDP)) {
 				if (switch_channel_test_flag(channel, CF_PROXY_MODE)) {
 					switch_channel_set_variable(channel, SWITCH_ENDPOINT_DISPOSITION_VARIABLE, "RECEIVED_NOMEDIA");
@@ -2537,7 +2547,7 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 	case nua_callstate_early:
 		break;
 	case nua_callstate_completed:
-		if (tech_pvt && r_sdp) {
+		if (r_sdp) {
 			sdp_parser_t *parser;
 			sdp_session_t *sdp;
 			uint8_t match = 0, is_ok = 1;
@@ -2809,16 +2819,13 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 
 		break;
 	case nua_callstate_terminating:
-		if (session) {
 		if (status == 488 || switch_channel_get_state(channel) == CS_HIBERNATE) {
 			tech_pvt->q850_cause = SWITCH_CAUSE_MANDATORY_IE_MISSING;
 		} else if (!switch_test_flag(tech_pvt, TFLAG_BYE)) {
 			switch_set_flag_locked(tech_pvt, TFLAG_BYE);
 		}
-		}
 		break;
 	case nua_callstate_terminated:
-		if (session) {
 		if (!switch_test_flag(tech_pvt, TFLAG_BYE)) {
 			switch_set_flag_locked(tech_pvt, TFLAG_BYE);
 			if (switch_test_flag(tech_pvt, TFLAG_NOHUP)) {
@@ -2850,7 +2857,7 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 		}
 
 		tech_pvt->nh = NULL;
-		}
+		
 
 		if (nh) {
 			nua_handle_bind(nh, NULL);