diff -ruN pjproject-2.10/pjmedia/include/pjmedia/transport_ice.h pjsip/pjmedia/include/pjmedia/transport_ice.h
--- pjproject-2.10/pjmedia/include/pjmedia/transport_ice.h	2020-02-14 10:48:27.000000000 +0100
+++ pjsip/pjmedia/include/pjmedia/transport_ice.h	2021-02-06 17:09:28.151078775 +0100
@@ -74,6 +74,28 @@
 			        pj_status_t status,
 				void *user_data);
 
+    /**
+     * This callback will be called when ICE state changes.
+     *
+     * @param tp       PJMEDIA ICE transport.
+     * @param prev     Previous state.
+     * @param curr     Current state.
+     */
+    void    (*on_ice_state)(pjmedia_transport *tp,
+                           pj_ice_strans_state prev,
+                           pj_ice_strans_state curr);
+
+    /**
+     * This callback will be called when ICE is stopped.
+     *
+     * @param tp       PJMEDIA ICE transport.
+     * @param reason   Reason for stopping ICE.
+     * @param err      Error code
+     */
+    void    (*on_ice_stop)(pjmedia_transport *tp,
+                          char *reason,
+                          pj_status_t err);
+
 } pjmedia_ice_cb;
 
 
@@ -237,6 +259,17 @@
 					 pjmedia_transport **p_tp);
 
 /**
+ * Return the ICE stream transport associated with this PJMEDIA transport
+ *
+ * @param tp           Media transport instance.
+ *
+ * @return             Pointer to the pj_ice_strans instance associated with this
+ *                      media transport.
+ */
+PJ_DECL(pj_ice_strans*) pjmedia_ice_get_strans(pjmedia_transport *tp);
+
+
+/**
  * Get the group lock for the ICE media transport.
  *
  * @param tp	        The ICE media transport.
diff -ruN pjproject-2.10/pjmedia/src/pjmedia/transport_ice.c pjsip/pjmedia/src/pjmedia/transport_ice.c
--- pjproject-2.10/pjmedia/src/pjmedia/transport_ice.c	2020-02-14 10:48:27.000000000 +0100
+++ pjsip/pjmedia/src/pjmedia/transport_ice.c	2021-02-06 21:40:50.021656143 +0100
@@ -163,6 +163,10 @@
 				pj_ice_strans_op op,
 			        pj_status_t status);
 
+static void ice_on_ice_state(pj_ice_strans *ice_st,
+                            pj_ice_strans_state prev,
+                            pj_ice_strans_state curr);
+
 /*
  * Clean up ICE resources.
  */
@@ -280,6 +284,7 @@
     /* Configure ICE callbacks */
     pj_bzero(&ice_st_cb, sizeof(ice_st_cb));
     ice_st_cb.on_ice_complete = &ice_on_ice_complete;
+    ice_st_cb.on_ice_state = &ice_on_ice_state;
     ice_st_cb.on_rx_data = &ice_on_rx_data;
 
     /* Configure RTP socket buffer settings, if not set */
@@ -314,6 +319,17 @@
     return PJ_SUCCESS;
 }
 
+/*
+ * Get the ICE stream transport associated with this media transport.
+ */
+PJ_DEF(pj_ice_strans*) pjmedia_ice_get_strans(pjmedia_transport *tp)
+{
+    struct transport_ice *tp_ice;
+
+    tp_ice = (struct transport_ice*) tp;
+    return tp_ice->ice_st;
+}
+
 PJ_DEF(pj_grp_lock_t *) pjmedia_ice_get_grp_lock(pjmedia_transport *tp)
 {
     PJ_ASSERT_RETURN(tp, NULL);
@@ -403,6 +419,10 @@
 		  "Stopping ICE, reason=%s", reason));
     }
 
+    /* Notify application about ICE stop */
+    if (tp_ice->cb.on_ice_stop)
+        (*tp_ice->cb.on_ice_stop)(&tp_ice->base, (char *)reason, err);
+
     if (tp_ice->ice_st) {
 	pj_ice_strans_stop_ice(tp_ice->ice_st);
     }
@@ -2115,6 +2135,19 @@
     }
 }
 
+static void ice_on_ice_state(pj_ice_strans *ice_st,
+                            pj_ice_strans_state prev,
+                            pj_ice_strans_state curr)
+{
+    struct transport_ice *tp_ice;
+
+    tp_ice = (struct transport_ice*) pj_ice_strans_get_user_data(ice_st);
+
+    /* Notify application */
+    if (tp_ice->cb.on_ice_state)
+       (*tp_ice->cb.on_ice_state)(&tp_ice->base, prev, curr);
+}
+
 
 /* Simulate lost */
 static pj_status_t transport_simulate_lost(pjmedia_transport *tp,