static int handle_ping_request(void *object, IP_Port source, const uint8_t *packet, uint16_t length, void *userdata)
{
DHT *dht = (DHT *)object;
int rc;
if (length != DHT_PING_SIZE) {
return 1;
}
PING *ping = dht->ping;
if (id_equal(packet + 1, ping->dht->self_public_key)) {
return 1;
}
uint8_t shared_key[CRYPTO_SHARED_KEY_SIZE];
uint8_t ping_plain[PING_PLAIN_SIZE];
// Decrypt ping_id
DHT_get_shared_key_recv(dht, shared_key, packet + 1);
rc = decrypt_data_symmetric(shared_key,
packet + 1 + CRYPTO_PUBLIC_KEY_SIZE,
packet + 1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE,
PING_PLAIN_SIZE + CRYPTO_MAC_SIZE,
ping_plain);
if (rc != sizeof(ping_plain)) {
return 1;
}
if (ping_plain[0] != NET_PACKET_PING_REQUEST) {
return 1;
}
uint64_t ping_id;
memcpy(&ping_id, ping_plain + 1, sizeof(ping_id));
// Send response
send_ping_response(ping, source, packet + 1, ping_id, shared_key);
add_to_ping(ping, packet + 1, source);
return 0;
}
static int handle_ping_request(void *_dht, IP_Port source, const uint8_t *packet, uint16_t length)
{
DHT *dht = _dht;
int rc;
if (length != DHT_PING_SIZE)
return 1;
PING *ping = dht->ping;
if (id_equal(packet + 1, ping->dht->self_public_key))
return 1;
uint8_t shared_key[crypto_box_BEFORENMBYTES];
uint8_t ping_plain[PING_PLAIN_SIZE];
// Decrypt ping_id
DHT_get_shared_key_recv(dht, shared_key, packet + 1);
rc = decrypt_data_symmetric(shared_key,
packet + 1 + crypto_box_PUBLICKEYBYTES,
packet + 1 + crypto_box_PUBLICKEYBYTES + crypto_box_NONCEBYTES,
PING_PLAIN_SIZE + crypto_box_MACBYTES,
ping_plain );
if (rc != sizeof(ping_plain))
return 1;
if (ping_plain[0] != NET_PACKET_PING_REQUEST)
return 1;
uint64_t ping_id;
memcpy(&ping_id, ping_plain + 1, sizeof(ping_id));
// Send response
send_ping_response(ping, source, packet + 1, ping_id, shared_key);
add_to_ping(ping, packet + 1, source);
return 0;
}