Make packet data a ptr-to-const.

Ensure that nobody inadvertly modifies the temporary packet data buffer.

1 files changed, 3 insertions, 2 deletions

diff --git a/toxcore/friend_connection.c b/toxcore/friend_connection.c
index 0779fb20..7c8471a0 100644
--- a/toxcore/friend_connection.c
+++ b/toxcore/friend_connection.c
@@ -392,7 +392,7 @@ static void dht_pk_callback(void *object, int32_t number, const uint8_t *dht_pub
     onion_set_friend_DHT_pubkey(fr_c->onion_c, friend_con->onion_friendnum, dht_public_key);
 }
 
-static int handle_packet(void *object, int number, uint8_t *data, uint16_t length, void *userdata)
+static int handle_packet(void *object, int number, const uint8_t *data, uint16_t length, void *userdata)
 {
     if (length == 0) {
         return -1;
@@ -647,7 +647,8 @@ void set_dht_temp_pk(Friend_Connections *fr_c, int friendcon_id, const uint8_t *
  * return -1 on failure
  */
 int friend_connection_callbacks(Friend_Connections *fr_c, int friendcon_id, unsigned int index,
-                                int (*status_callback)(void *object, int id, uint8_t status), int (*data_callback)(void *object, int id, uint8_t *data,
+                                int (*status_callback)(void *object, int id, uint8_t status), int (*data_callback)(void *object, int id,
+                                        const uint8_t *data,
                                         uint16_t length, void *userdata), int (*lossy_data_callback)(void *object, int id, const uint8_t *data,
                                                 uint16_t length), void *object,
                                 int number)