add block_dtmf and unblock_dtmf apps

src/include/switch_ivr.h

@@ -806,6 +806,9 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_read(switch_core_session_t *session,
 												const char *var_name,
 												char *digit_buffer, switch_size_t digit_buffer_length, uint32_t timeout, const char *valid_terminators);
 
+SWITCH_DECLARE(switch_status_t) switch_ivr_block_dtmf_session(switch_core_session_t *session);
+SWITCH_DECLARE(switch_status_t) switch_ivr_unblock_dtmf_session(switch_core_session_t *session);
+
 SWITCH_DECLARE(switch_status_t) switch_ivr_bind_dtmf_meta_session(switch_core_session_t *session, uint32_t key,
 																  switch_bind_flag_t bind_flags, const char *app);
 SWITCH_DECLARE(switch_status_t) switch_ivr_unbind_dtmf_meta_session(switch_core_session_t *session, uint32_t key);

src/mod/applications/mod_dptools/mod_dptools.c

@@ -198,6 +198,16 @@ SWITCH_STANDARD_APP(soft_hold_function)
 	}
 }
 
+SWITCH_STANDARD_APP(dtmf_unblock_function)
+{
+	switch_ivr_unblock_dtmf_session(session);
+}
+
+SWITCH_STANDARD_APP(dtmf_block_function)
+{
+	switch_ivr_block_dtmf_session(session);
+}
+
 #define UNBIND_SYNTAX "[<key>]"
 SWITCH_STANDARD_APP(dtmf_unbind_function)
 {
@@ -3108,6 +3118,8 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_dptools_load)
 				   SAF_SUPPORT_NOMEDIA);
 	SWITCH_ADD_APP(app_interface, "unbind_meta_app", "Unbind a key from an application", "Unbind a key from an application", dtmf_unbind_function,
 				   UNBIND_SYNTAX, SAF_SUPPORT_NOMEDIA);
+	SWITCH_ADD_APP(app_interface, "block_dfmf", "Block DTMF", "Block DTMF", dtmf_block_function, "", SAF_SUPPORT_NOMEDIA);
+	SWITCH_ADD_APP(app_interface, "unblock_dtmf", "Stop blocking DTMF", "Stop blocking DTMF", dtmf_unblock_function, "", SAF_SUPPORT_NOMEDIA);
 	SWITCH_ADD_APP(app_interface, "intercept", "intercept", "intercept", intercept_function, INTERCEPT_SYNTAX, SAF_NONE);
 	SWITCH_ADD_APP(app_interface, "eavesdrop", "eavesdrop on a uuid", "eavesdrop on a uuid", eavesdrop_function, eavesdrop_SYNTAX, SAF_MEDIA_TAP);
 	SWITCH_ADD_APP(app_interface, "three_way", "three way call with a uuid", "three way call with a uuid", three_way_function, threeway_SYNTAX,

src/switch_ivr_async.c

@@ -2180,6 +2180,7 @@ typedef struct {
 } dtmf_meta_data_t;
 
 #define SWITCH_META_VAR_KEY "__dtmf_meta"
+#define SWITCH_BLOCK_DTMF_KEY "__dtmf_block"
 
 typedef struct {
 	switch_core_session_t *session;
@@ -2355,6 +2356,44 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_unbind_dtmf_meta_session(switch_core_
 	return SWITCH_STATUS_SUCCESS;
 }
 
+static switch_status_t block_on_dtmf(switch_core_session_t *session, const switch_dtmf_t *dtmf, switch_dtmf_direction_t direction)
+{
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	uint8_t enabled = (intptr_t)switch_channel_get_private(channel, SWITCH_BLOCK_DTMF_KEY);
+
+	if (!enabled || switch_channel_test_flag(channel, CF_INNER_BRIDGE)) {
+		return SWITCH_STATUS_SUCCESS;
+	}
+
+	return SWITCH_STATUS_FALSE;
+}
+
+SWITCH_DECLARE(switch_status_t) switch_ivr_unblock_dtmf_session(switch_core_session_t *session)
+{
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	uint8_t enabled = (intptr_t)switch_channel_get_private(channel, SWITCH_BLOCK_DTMF_KEY);
+	
+	if (enabled) {
+		switch_channel_set_private(channel, SWITCH_BLOCK_DTMF_KEY, NULL);
+	}
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+SWITCH_DECLARE(switch_status_t) switch_ivr_block_dtmf_session(switch_core_session_t *session)
+{
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+	uint8_t enabled = (intptr_t)switch_channel_get_private(channel, SWITCH_BLOCK_DTMF_KEY);
+
+	if (!enabled) {
+		switch_channel_set_private(channel, SWITCH_BLOCK_DTMF_KEY, (void *)(intptr_t)1);
+		switch_core_event_hook_add_send_dtmf(session, block_on_dtmf);
+		switch_core_event_hook_add_recv_dtmf(session, block_on_dtmf);
+	}
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
 SWITCH_DECLARE(switch_status_t) switch_ivr_bind_dtmf_meta_session(switch_core_session_t *session, uint32_t key,
 																  switch_bind_flag_t bind_flags, const char *app)
 {