fix small issue

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7271 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia_glue.c

@@ -1583,7 +1583,7 @@ uint8_t sofia_glue_negotiate_sdp(switch_core_session_t *session, sdp_session_t *
 					crypto = attr->a_value;
 					crypto_tag = atoi(crypto);
 
-					if (tech_pvt->remote_crypto_key) {
+					if (tech_pvt->remote_crypto_key && switch_rtp_ready(tech_pvt->rtp_session)) {
 						if (crypto_tag && crypto_tag == tech_pvt->crypto_tag) {
 							switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Existing key is still valid.\n");
 						} else {
@@ -1594,9 +1594,12 @@ uint8_t sofia_glue_negotiate_sdp(switch_core_session_t *session, sdp_session_t *
 								switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Change Remote key to [%s]\n", crypto);
 								tech_pvt->remote_crypto_key = switch_core_session_strdup(tech_pvt->session, crypto);
 								tech_pvt->crypto_tag = crypto_tag;
-								sofia_glue_add_crypto(tech_pvt, tech_pvt->remote_crypto_key, SWITCH_RTP_CRYPTO_RECV);
-								switch_rtp_add_crypto_key(tech_pvt->rtp_session, SWITCH_RTP_CRYPTO_RECV, tech_pvt->crypto_tag, 
-														  tech_pvt->crypto_type, tech_pvt->remote_raw_key, SWITCH_RTP_KEY_LEN);
+								
+								if (switch_rtp_ready(tech_pvt->rtp_session)) {
+									sofia_glue_add_crypto(tech_pvt, tech_pvt->remote_crypto_key, SWITCH_RTP_CRYPTO_RECV);
+									switch_rtp_add_crypto_key(tech_pvt->rtp_session, SWITCH_RTP_CRYPTO_RECV, tech_pvt->crypto_tag, 
+															  tech_pvt->crypto_type, tech_pvt->remote_raw_key, SWITCH_RTP_KEY_LEN);
+								}
 								got_crypto++;
 							} else {
 								switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Ignoring unacceptable key\n");