1 files changed, 28 insertions, 5 deletions

diff --git a/res/res_pjsip_session.c b/res/res_pjsip_session.c
index aad24382f..1de246135 100644
--- a/res/res_pjsip_session.c
+++ b/res/res_pjsip_session.c
@@ -888,10 +888,32 @@ int ast_sip_session_refresh(struct ast_sip_session *session,
 	return 0;
 }
 
+/*!
+ * \internal
+ * \brief Wrapper for pjsip_inv_send_msg
+ *
+ * This function (re)sets the transport before sending to catch cases
+ * where the transport might have changed.
+ *
+ * If pjproject gives us the ability to resend, we'll only reset the transport
+ * if PJSIP_ETPNOTAVAIL is returned from send.
+ *
+ * \returns pj_status_t
+ */
+static pj_status_t internal_pjsip_inv_send_msg(pjsip_inv_session *inv, const char *transport_name, pjsip_tx_data *tdata)
+{
+	pjsip_tpselector selector = { .type = PJSIP_TPSELECTOR_NONE, };
+
+	ast_sip_set_tpselector_from_transport_name(transport_name, &selector);
+	pjsip_dlg_set_transport(inv->dlg, &selector);
+
+	return pjsip_inv_send_msg(inv, tdata);
+}
+
 void ast_sip_session_send_response(struct ast_sip_session *session, pjsip_tx_data *tdata)
 {
 	handle_outgoing_response(session, tdata);
-	pjsip_inv_send_msg(session->inv_session, tdata);
+	internal_pjsip_inv_send_msg(session->inv_session, session->endpoint->transport, tdata);
 	return;
 }
 
@@ -1087,7 +1109,8 @@ void ast_sip_session_send_request_with_cb(struct ast_sip_session *session, pjsip
 	}
 
 	handle_outgoing_request(session, tdata);
-	pjsip_inv_send_msg(session->inv_session, tdata);
+	internal_pjsip_inv_send_msg(session->inv_session, session->endpoint->transport, tdata);
+
 	return;
 }
 
@@ -1852,7 +1875,7 @@ static pjsip_inv_session *pre_session_setup(pjsip_rx_data *rdata, const struct a
 		if (pjsip_inv_initial_answer(inv_session, rdata, 500, NULL, NULL, &tdata) != PJ_SUCCESS) {
 			pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
 		}
-		pjsip_inv_send_msg(inv_session, tdata);
+		internal_pjsip_inv_send_msg(inv_session, endpoint->transport, tdata);
 		return NULL;
 	}
 	return inv_session;
@@ -2005,7 +2028,7 @@ static void handle_new_invite_request(pjsip_rx_data *rdata)
 		if (pjsip_inv_initial_answer(inv_session, rdata, 500, NULL, NULL, &tdata) == PJ_SUCCESS) {
 			pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
 		} else {
-			pjsip_inv_send_msg(inv_session, tdata);
+			internal_pjsip_inv_send_msg(inv_session, endpoint->transport, tdata);
 		}
 		return;
 	}
@@ -2015,7 +2038,7 @@ static void handle_new_invite_request(pjsip_rx_data *rdata)
 		if (pjsip_inv_initial_answer(inv_session, rdata, 500, NULL, NULL, &tdata) == PJ_SUCCESS) {
 			pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
 		} else {
-			pjsip_inv_send_msg(inv_session, tdata);
+			internal_pjsip_inv_send_msg(inv_session, endpoint->transport, tdata);
 		}
 		ao2_cleanup(invite);
 	}