@@ -3038,6 +3038,52 @@ unblock_media("all");

 		</example>

 	</section>

+	<section id="rtpengine.f.silence_media">

+		<title>

+		<function moreinfo="none">silence_media([flags])</function>

+		</title>

+		<para>

+		Identical to <quote>block_media</quote> except that media &rtp; packets are not

+		simply blocked, but instead have their audio payload replaced by silence audio.

+		This is only supported for certain trivial audio codecs (e.g. G.711, G.722).

+		</para>

+		<para>

+		See <quote>block_dtmf</quote> for a description of the flags that can be used.

+		</para>

+		<example>

+		<title><function>silence_media</function> usage</title>

+		<programlisting format="linespecific">

+...

+silence_media();

+silence_media("directional");

+silence_media("address=192.168.42.42");

+...

+		</programlisting>

+		</example>

+	</section>

+

+	<section id="rtpengine.f.unsilence_media">

+		<title>

+		<function moreinfo="none">unsilence_media([flags])</function>

+		</title>

+		<para>

+		Identical to <quote>unblock_media</quote> except that it's the counterpart to

+		<quote>silence_media</quote>.

+		</para>

+		<para>

+		See <quote>unblock_dtmf</quote> for a description of the flags that can be used.

+		</para>

+		<example>

+		<title><function>unsilence_media</function> usage</title>

+		<programlisting format="linespecific">

+...

+unsilence_media();

+unsilence_media("all");

+...

+		</programlisting>

+		</example>

+	</section>

+

 	<section id="rtpengine.f.start_forwarding">

 		<title>

 		<function moreinfo="none">start_forwarding([flags])</function>

@@ -137,6 +137,8 @@ static const char *command_strings[] = {

 	[OP_UNBLOCK_DTMF]	= "unblock DTMF",

 	[OP_BLOCK_MEDIA]	= "block media",

 	[OP_UNBLOCK_MEDIA]	= "unblock media",

+	[OP_SILENCE_MEDIA]	= "silence media",

+	[OP_UNSILENCE_MEDIA]	= "unsilence media",

 	[OP_START_FORWARDING]	= "start forwarding",

 	[OP_STOP_FORWARDING]	= "stop forwarding",

 	[OP_PLAY_MEDIA]		= "play media",

@@ -200,6 +202,8 @@ static int block_dtmf_f(struct sip_msg *, char *, char *);

 static int unblock_dtmf_f(struct sip_msg *, char *, char *);

 static int block_media_f(struct sip_msg *, char *, char *);

 static int unblock_media_f(struct sip_msg *, char *, char *);

+static int silence_media_f(struct sip_msg *, char *, char *);

+static int unsilence_media_f(struct sip_msg *, char *, char *);

 static int start_forwarding_f(struct sip_msg *, char *, char *);

 static int stop_forwarding_f(struct sip_msg *, char *, char *);

 static int play_media_f(struct sip_msg *, char *, char *);

@@ -355,6 +359,12 @@ static cmd_export_t cmds[] = {

 	{"unblock_media",	(cmd_function)unblock_media_f, 		0,

 		0, 0,

 		ANY_ROUTE},

+	{"silence_media",	(cmd_function)silence_media_f,	 	0,

+		0, 0,

+		ANY_ROUTE },

+	{"unsilence_media",	(cmd_function)unsilence_media_f, 	0,

+		0, 0,

+		ANY_ROUTE},

 	{"block_dtmf",		(cmd_function)block_dtmf_f,	 	1,

 		fixup_spve_null, 0,

 		ANY_ROUTE },

@@ -367,6 +377,12 @@ static cmd_export_t cmds[] = {

 	{"unblock_media",	(cmd_function)unblock_media_f, 		1,

 		fixup_spve_null, 0,

 		ANY_ROUTE},

+	{"silence_media",	(cmd_function)silence_media_f,	 	1,

+		fixup_spve_null, 0,

+		ANY_ROUTE },

+	{"unsilence_media",	(cmd_function)unsilence_media_f, 	1,

+		fixup_spve_null, 0,

+		ANY_ROUTE},

 	{"start_forwarding",	(cmd_function)start_forwarding_f,	0,

 		0, 0,

 		ANY_ROUTE },

@@ -2631,7 +2647,8 @@ static bencode_item_t *rtpp_function_call(bencode_buffer_t *bencbuf, struct sip_

 	bencode_list_add_string(item, ip_addr2a(&msg->rcv.src_ip));

 	if (op == OP_BLOCK_DTMF || op == OP_BLOCK_MEDIA || op == OP_UNBLOCK_DTMF

-			|| op == OP_UNBLOCK_MEDIA || op == OP_START_FORWARDING || op == OP_STOP_FORWARDING)

+			|| op == OP_UNBLOCK_MEDIA || op == OP_START_FORWARDING || op == OP_STOP_FORWARDING

+			|| op == OP_SILENCE_MEDIA || op == OP_UNSILENCE_MEDIA)

 	{

 		if (ng_flags.directional)

 			bencode_dictionary_add_str(ng_flags.dict, "from-tag", &ng_flags.from_tag);

@@ -4018,6 +4035,18 @@ unblock_media_f(struct sip_msg* msg, char *str1, char *str2)

 	return rtpengine_generic_f(msg, str1, OP_UNBLOCK_MEDIA);

 }

+static int

+silence_media_f(struct sip_msg* msg, char *str1, char *str2)

+{

+	return rtpengine_generic_f(msg, str1, OP_SILENCE_MEDIA);

+}

+

+static int

+unsilence_media_f(struct sip_msg* msg, char *str1, char *str2)

+{

+	return rtpengine_generic_f(msg, str1, OP_UNSILENCE_MEDIA);

+}

+

 static int rtpengine_play_media(struct sip_msg *msg, void *d, int more, enum rtpe_operation op) {

 	bencode_buffer_t bencbuf;

 	long long duration;

@@ -4235,6 +4264,23 @@ static int ki_unblock_media(sip_msg_t *msg , str *flags)

 	return rtpengine_rtpp_set_wrap(msg, rtpengine_simple_wrap, flags->s, 1, OP_UNBLOCK_MEDIA);

 }

+static int ki_silence_media0(sip_msg_t *msg)

+{

+	return rtpengine_rtpp_set_wrap(msg, rtpengine_simple_wrap, NULL, 1, OP_SILENCE_MEDIA);

+}

+static int ki_silence_media(sip_msg_t *msg, str *flags)

+{

+	return rtpengine_rtpp_set_wrap(msg, rtpengine_simple_wrap, flags->s, 1, OP_SILENCE_MEDIA);

+}

+static int ki_unsilence_media0(sip_msg_t *msg)

+{

+	return rtpengine_rtpp_set_wrap(msg, rtpengine_simple_wrap, NULL, 1, OP_UNSILENCE_MEDIA);

+}

+static int ki_unsilence_media(sip_msg_t *msg , str *flags)

+{

+	return rtpengine_rtpp_set_wrap(msg, rtpengine_simple_wrap, flags->s, 1, OP_UNSILENCE_MEDIA);

+}

+

 static int ki_block_dtmf0(sip_msg_t *msg)

 {

 	return rtpengine_rtpp_set_wrap(msg, rtpengine_simple_wrap, NULL, 1, OP_BLOCK_DTMF);

@@ -4403,6 +4449,27 @@ static sr_kemi_t sr_kemi_rtpengine_exports[] = {

             SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }

     },

+	{ str_init("rtpengine"), str_init("silence_media0"),

+        SR_KEMIP_INT, ki_silence_media0,

+        { SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE,

+            SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }

+    },

+    { str_init("rtpengine"), str_init("silence_media"),

+        SR_KEMIP_INT, ki_silence_media,

+        { SR_KEMIP_STR, SR_KEMIP_NONE, SR_KEMIP_NONE,

+            SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }

+    },

+	{ str_init("rtpengine"), str_init("unsilence_media0"),

+        SR_KEMIP_INT, ki_unsilence_media0,

+        { SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE,

+            SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }

+    },

+    { str_init("rtpengine"), str_init("unsilence_media"),

+        SR_KEMIP_INT, ki_unsilence_media,

+        { SR_KEMIP_STR, SR_KEMIP_NONE, SR_KEMIP_NONE,

+            SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }

+    },

+

 	{ str_init("rtpengine"), str_init("block_dtmf0"),

         SR_KEMIP_INT, ki_block_dtmf0,

         { SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE,

@@ -42,6 +42,8 @@ enum rtpe_operation {

         OP_UNBLOCK_DTMF,

         OP_BLOCK_MEDIA,

         OP_UNBLOCK_MEDIA,

+        OP_SILENCE_MEDIA,

+        OP_UNSILENCE_MEDIA,

         OP_START_FORWARDING,

         OP_STOP_FORWARDING,

         OP_PLAY_MEDIA,