adding echo cancel code based on tdmc package

src/mod/endpoints/mod_media_gateway/media_gateway.c

@@ -493,6 +493,7 @@ switch_status_t megaco_context_is_term_present(mg_context_t *ctx, mg_termination
 
 switch_status_t megaco_context_add_termination(mg_context_t *ctx, mg_termination_t *term)
 {
+	mg_termination_t* tdm_term = NULL;
     switch_status_t status = SWITCH_STATUS_SUCCESS;
 
     switch_assert(ctx != NULL);
@@ -531,7 +532,19 @@ switch_status_t megaco_context_add_termination(mg_context_t *ctx, mg_termination
         
         switch_ivr_uuid_bridge(ctx->terminations[0]->uuid, ctx->terminations[1]->uuid);
 
-         ctx->terminations[0]->profile->mg_stats->total_num_of_call_recvd++;
+		if(MG_TERM_TDM == ctx->terminations[0]->type){
+			tdm_term = ctx->terminations[0];
+		}else{
+			tdm_term = ctx->terminations[1];
+		}
+		if(MG_EC_ENABLE == tdm_term->ec_type){
+				mg_term_set_ec(tdm_term,0x01);
+		}else if(MG_EC_DISABLE == tdm_term->ec_type){
+				mg_term_set_ec(tdm_term,0x00);
+		}
+		mg_set_term_ec_status(tdm_term, MG_EC_UNDEFINED);
+
+		ctx->terminations[0]->profile->mg_stats->total_num_of_call_recvd++;
     }
 
     return SWITCH_STATUS_SUCCESS;
@@ -893,7 +906,10 @@ void mg_term_set_ec(mg_termination_t *term, int enable)
         switch_core_session_rwunlock(session);
         
         switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Sent echo_cancel event to [%s] to [%s]\n", term->uuid, enable ? "enable" : "disable");
-    }
+	}else{
+			mg_ec_types_t status = ((enable)?MG_EC_ENABLE:MG_EC_DISABLE);
+			mg_set_term_ec_status(term, status);
+	}
     
     switch_event_destroy(&event);
 }

src/mod/endpoints/mod_media_gateway/media_gateway_stack.h

@@ -167,7 +167,9 @@ typedef enum {
    (_reqId)->id.val = 0xFFFFFFFF;
 
 
-switch_status_t mg_prc_descriptors(megaco_profile_t* mg_profile, MgMgcoCommand *inc_cmd, mg_termination_t* term, CmMemListCp     *memCp);
+
+void mg_set_term_ec_status(mg_termination_t* term, mg_ec_types_t status);
+switch_status_t mg_prc_descriptors(megaco_profile_t* mg_profile, MgMgcoCommand *inc_cmd, mg_termination_t* term, CmMemListCp  *memCp);
 void handle_sng_log(uint8_t level, char *fmt, ...);
 void handle_mgco_sta_ind(Pst *pst, SuId suId, MgMgtSta* msg);
 void handle_mgco_txn_sta_ind(Pst *pst, SuId suId, MgMgcoInd* msg);

src/mod/endpoints/mod_media_gateway/media_gateway_utils.c

@@ -2397,3 +2397,11 @@ void mg_apply_tdm_ec(mg_termination_t* term, mg_context_t *mg_ctxt)
 	}
 }
 /*****************************************************************************************************************************/
+void mg_set_term_ec_status(mg_termination_t* term, mg_ec_types_t status)
+{
+	if(NULL != term) {
+		term->ec_type = status;
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO,"Setting Term EC[%s]\n",mg_ec_types_tostr(term->ec_type));	
+	}
+}
+/*****************************************************************************************************************************/

src/mod/endpoints/mod_media_gateway/mod_media_gateway.h

@@ -132,6 +132,29 @@ typedef enum {
     MG_T38_FAX_NOTIFY_INVALID,
 } mg_t38_fax_notify_t;
 
+typedef enum {
+    MG_EC_UNDEFINED = 0,
+    MG_EC_ENABLE,
+    MG_EC_DISABLE,
+    MG_EC_INVALID
+} mg_ec_types_t;
+
+static inline const char *mg_ec_types_tostr(mg_ec_types_t type) {
+    switch (type) {
+        case MG_EC_UNDEFINED:
+            return "UNDEFINED";
+        case MG_EC_ENABLE:
+            return "ENABLE";
+        case MG_EC_DISABLE:
+            return "DISABLE";
+        case MG_EC_INVALID:
+            return "INVALID";
+        default:
+            return "Invalid";
+    }
+    return NULL;
+}
+
 
 typedef enum {
     MGM_AUDIO = 0,
@@ -205,6 +228,7 @@ struct mg_termination_s {
     int  *mg_error_code; /* MEGACO error code */
     uint32_t flags;
     const char *tech; /* Endpoint controlling the TDM interface - only FreeTDM tested so far */
+	mg_ec_types_t ec_type;
     
     union {
         struct {