From: mohitdhiman <mohitdhiman@drishti-soft.com>
Date: Mon, 7 Jan 2019 18:04:43 +0000 (+0530)
Subject: stasis/endpoint: Fix memory leak of channel_ids in ast_endpoint structure.
X-Git-Tag: 16.2.0-rc1~24^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b24da607e695897f54f4b21208885fae7ac9158;p=thirdparty%2Fasterisk.git

stasis/endpoint: Fix memory leak of channel_ids in ast_endpoint structure.

During Bridging of two channels if masquerade operation is performed on a
channel (clone channel) which was created with endpoint details
(ast_channel_alloc_with_endpoint()) and the original channel which is created
without endpoint details (ast_channel_alloc()) then both the channels must
exchange their endpoint details or else after masquerade when clone channel
is being destroyed the endpoint cleanup callbacks will be destroyed too and
after call completion unique_id of original channel will still be there in
ast_endpoint structure's channel_ids container.

ASTERISK-28197

Change-Id: Ied0451f378a3f2a36acc8c0984959a69895efa17
---

diff --git a/include/asterisk/channel.h b/include/asterisk/channel.h
index 3f22cdd9c5..7a5a4efa81 100644
--- a/include/asterisk/channel.h
+++ b/include/asterisk/channel.h
@@ -2649,6 +2649,18 @@ void ast_channel_internal_swap_uniqueid_and_linkedid(struct ast_channel *a, stru
  */
 void ast_channel_internal_swap_topics(struct ast_channel *a, struct ast_channel *b);
 
+/*!
+ * \brief Swap endpoint_forward and endpoint_cache_forward between two channels
+ * \param a First channel
+ * \param b Second channel
+ * \return void
+ *
+ * \note
+ * This is used in masquerade to exchange endpoint details if one of the two or both
+ * the channels were created with endpoint
+ */
+void ast_channel_internal_swap_endpoint_forward_and_endpoint_cache_forward(struct ast_channel *a, struct ast_channel *b);
+
 /*!
  * \brief Set uniqueid and linkedid string value only (not time)
  * \param chan The channel to set the uniqueid to
diff --git a/main/channel.c b/main/channel.c
index 6c6e9f758b..8f27822be2 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -6819,6 +6819,12 @@ static void channel_do_masquerade(struct ast_channel *original, struct ast_chann
 	/* Make sure the Stasis topic on the channel is updated appropriately */
 	ast_channel_internal_swap_topics(clonechan, original);
 
+	/* Swap endpoint forward and endpoint cache forward details of the channels,
+	 * so channel created with endpoint exchanges its state with other channel
+	 * for proper endpoint cleanup.
+	 */
+	ast_channel_internal_swap_endpoint_forward_and_endpoint_cache_forward(clonechan, original);
+
 	/* Swap channel names. This uses ast_channel_name_set directly, so we
 	 * don't get any spurious rename events.
 	 */
diff --git a/main/channel_internal_api.c b/main/channel_internal_api.c
index a963a7d3ea..5269715fde 100644
--- a/main/channel_internal_api.c
+++ b/main/channel_internal_api.c
@@ -1388,6 +1388,18 @@ void ast_channel_internal_swap_topics(struct ast_channel *a, struct ast_channel
 	b->topics = temp;
 }
 
+void ast_channel_internal_swap_endpoint_forward_and_endpoint_cache_forward(struct ast_channel *a, struct ast_channel *b)
+{
+	struct stasis_forward *temp;
+	temp = a->endpoint_forward;
+	a->endpoint_forward = b->endpoint_forward;
+	b->endpoint_forward = temp;
+
+	temp = a->endpoint_cache_forward;
+	a->endpoint_cache_forward = b->endpoint_cache_forward;
+	b->endpoint_cache_forward = temp;
+}
+
 void ast_channel_internal_set_fake_ids(struct ast_channel *chan, const char *uniqueid, const char *linkedid)
 {
 	ast_copy_string(chan->uniqueid.unique_id, uniqueid, sizeof(chan->uniqueid.unique_id));