Added number to cookie request/response packets to prevent possible

DoS issue.

1 files changed, 4 insertions, 2 deletions

diff --git a/docs/Tox_middle_level_network_protocol.txt b/docs/Tox_middle_level_network_protocol.txt
index 39b275d2..0382dd4e 100644
--- a/docs/Tox_middle_level_network_protocol.txt
+++ b/docs/Tox_middle_level_network_protocol.txt
@@ -41,12 +41,14 @@ Detailed implementation details:
 cookie request packet:
 [uint8_t 24][Senders DHT Public key (32 bytes)][Random nonce (24 
 bytes)][Encrypted message containing: [Senders real public key (32 
-bytes)][Recievers real public key (32 bytes)]]
+bytes)][Recievers real public key (32 bytes)][uint64_t number (must be sent back 
+untouched in cookie response)]]
 Encrypted message is encrypted with sender DHT private key, recievers DHT 
 public key and the nonce.
 
 cookie response packet:
-[uint8_t 25][Random nonce (24 bytes)][Encrypted message containing: [Cookie]]
+[uint8_t 25][Random nonce (24 bytes)][Encrypted message containing: 
+[Cookie][uint64_t number (that was sent in the request)]]
 Encrypted message is encrypted with sender DHT private key, recievers DHT 
 public key and the nonce.