//Packet handling functions
//One to handle each types of packets we receive
//return 0 if handled correctly, 1 if packet is bad.
int handle_pingreq(uint8_t * packet, uint32_t length, IP_Port source)
{
uint64_t ping_id;
if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING)
{
return 1;
}
if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0)//check if packet is from ourself.
{
return 1;
}
int len = decrypt_data(packet + 1, self_secret_key, packet + 1 + CLIENT_ID_SIZE,
packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES,
sizeof(ping_id) + ENCRYPTION_PADDING, (uint8_t *)&ping_id);
if(len != sizeof(ping_id))
{
return 1;
}
pingres(source, packet + 1, ping_id);
pingreq(source, packet + 1);//TODO: make this smarter?
return 0;
}
int handle_pingreq(char * packet, uint32_t length, IP_Port source)//tested
{
if(length != 5 + CLIENT_ID_SIZE)
{
return 1;
}
uint32_t ping_id;
memcpy(&ping_id, packet + 1, 4);
IP_Port bad_ip = {{{0}}, 0};
if(is_pinging(bad_ip, ping_id))//check if packet is from ourself.
{
return 1;
}
pingres(source, ping_id);
pingreq(source);
return 0;
}
