prevent invalid state change

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7365 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -1808,7 +1808,9 @@ static switch_call_cause_t sofia_outgoing_channel(switch_core_session_t *session
 	switch_channel_set_flag(nchannel, CF_OUTBOUND);
 	switch_set_flag_locked(tech_pvt, TFLAG_OUTBOUND);
 	switch_clear_flag_locked(tech_pvt, TFLAG_LATE_NEGOTIATION);
-	switch_channel_set_state(nchannel, CS_INIT);
+	if (switch_channel_get_state(nchannel) == CS_NEW) {
+		switch_channel_set_state(nchannel, CS_INIT);
+	}
 	tech_pvt->caller_profile = caller_profile;
 	*new_session = nsession;
 	cause = SWITCH_CAUSE_SUCCESS;

src/mod/endpoints/mod_sofia/sofia.c

@@ -1530,7 +1530,9 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 				if (switch_channel_test_flag(channel, CF_BYPASS_MEDIA)) {
 					switch_channel_set_variable(channel, SWITCH_ENDPOINT_DISPOSITION_VARIABLE, "RECEIVED_NOMEDIA");
 					switch_set_flag_locked(tech_pvt, TFLAG_READY);
-					switch_channel_set_state(channel, CS_INIT);
+					if (switch_channel_get_state(channel) == CS_NEW) {
+						switch_channel_set_state(channel, CS_INIT);
+					}
 					switch_set_flag(tech_pvt, TFLAG_SDP);
 					goto done;
 				} else {
@@ -1553,7 +1555,9 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 						su_home_t *home = NULL;
 						switch_channel_set_variable(channel, SWITCH_ENDPOINT_DISPOSITION_VARIABLE, "RECEIVED");
 						switch_set_flag_locked(tech_pvt, TFLAG_READY);
-						switch_channel_set_state(channel, CS_INIT);
+						if (switch_channel_get_state(channel) == CS_NEW) {
+							switch_channel_set_state(channel, CS_INIT);
+						}
 						switch_set_flag(tech_pvt, TFLAG_SDP);
 						if (replaces_str) {
 							home = su_home_new(sizeof(*home));
@@ -1748,7 +1752,9 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 							}
 							if (switch_channel_get_state(channel) == CS_HIBERNATE) {
 								switch_set_flag_locked(tech_pvt, TFLAG_READY);
-								switch_channel_set_state(channel, CS_INIT);
+								if (switch_channel_get_state(channel) == CS_NEW) {
+									switch_channel_set_state(channel, CS_INIT);
+								}
 								switch_set_flag(tech_pvt, TFLAG_SDP);
 							}
 							goto done;