add user_ptr in callback.

Author: xicilion

include/juice/juice.h

@@ -73,7 +73,7 @@ typedef struct juice_stun_binding {
 	uint16_t port;
 } juice_stun_binding_t;
 
-typedef void (*juice_cb_stun_binding_t)(const juice_stun_binding_t *info);
+typedef void (*juice_cb_stun_binding_t)(const juice_stun_binding_t *info, void *user_ptr);
 
 typedef struct juice_turn_server {
 	const char *host;
@@ -129,7 +129,7 @@ JUICE_EXPORT int juice_get_selected_addresses(juice_agent_t *agent, char *local,
                                               char *remote, size_t remote_size);
 JUICE_EXPORT int juice_set_local_ice_attributes(juice_agent_t *agent, const char *ufrag, const char *pwd);
 JUICE_EXPORT const char *juice_state_to_string(juice_state_t state);
-JUICE_EXPORT int juice_bind_stun(const char *bind_address, int local_port, juice_cb_stun_binding_t cb);
+JUICE_EXPORT int juice_bind_stun(const char *bind_address, int local_port, juice_cb_stun_binding_t cb, void *user_ptr);
 JUICE_EXPORT int juice_unbind_stun();
 
 // ICE server

src/conn.c

@@ -262,6 +262,7 @@ int juice_unbind_stun() {
 	mutex_lock(&registry->mutex);
 
 	registry->cb_stun_binding = NULL;
+	registry->stun_binding_user_ptr = NULL;
 	conn_mux_interrupt_registry(registry);
 
 	release_registry(entry);
@@ -271,7 +272,7 @@ int juice_unbind_stun() {
 	return 0;
 }
 
-int juice_bind_stun(const char *bind_address, int local_port, juice_cb_stun_binding_t cb)
+int juice_bind_stun(const char *bind_address, int local_port, juice_cb_stun_binding_t cb, void *user_ptr)
 {
 	conn_mode_entry_t *entry = &mode_entries[JUICE_CONCURRENCY_MODE_MUX];
 
@@ -293,6 +294,7 @@ int juice_bind_stun(const char *bind_address, int local_port, juice_cb_stun_bind
 		return -2;
 
 	registry->cb_stun_binding = cb;
+	registry->stun_binding_user_ptr = user_ptr;
 	mutex_unlock(&registry->mutex);
 
 	return 0;

src/conn.h

@@ -31,6 +31,7 @@ typedef struct conn_registry {
 	int agents_size;
 	int agents_count;
 	juice_cb_stun_binding_t cb_stun_binding;
+	void *stun_binding_user_ptr;
 } conn_registry_t;
 
 int conn_create(juice_agent_t *agent, udp_socket_config_t *config);

src/conn_mux.c

@@ -319,7 +319,7 @@ static juice_agent_t *lookup_agent(conn_registry_t *registry, char *buf, size_t
 			binding_info.address = host;
 			binding_info.port = addr_get_port((struct sockaddr *)src);
 
-			registry->cb_stun_binding(&binding_info);
+			registry->cb_stun_binding(&binding_info, registry->stun_binding_user_ptr);
 
 			return NULL;
 		}