packets: allow removal of callbacks

Signed-off-by: Aris Adamantiadis <aris@0xbadc0de.be>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

include/libssh/packet.h

@@ -70,6 +70,7 @@ int ssh_packet_parse_type(ssh_session session);
 int ssh_packet_socket_callback(const void *data, size_t len, void *user);
 void ssh_packet_register_socket_callback(ssh_session session, struct ssh_socket_struct *s);
 void ssh_packet_set_callbacks(ssh_session session, ssh_packet_callbacks callbacks);
+void ssh_packet_remove_callbacks(ssh_session session, ssh_packet_callbacks callbacks);
 void ssh_packet_set_default_callbacks(ssh_session session);
 void ssh_packet_process(ssh_session session, uint8_t type);
 

src/packet.c

@@ -1241,6 +1241,17 @@ void ssh_packet_set_callbacks(ssh_session session, ssh_packet_callbacks callback
   }
 }
 
+/** @internal
+ * @brief remove the callbacks from the packet layer
+ */
+void ssh_packet_remove_callbacks(ssh_session session, ssh_packet_callbacks callbacks){
+    struct ssh_iterator *it = NULL;
+    it = ssh_list_find(session->packet_callbacks, callbacks);
+    if (it != NULL) {
+        ssh_list_remove(session->packet_callbacks, it);
+    }
+}
+
 /** @internal
  * @brief sets the default packet handlers
  */