smart_fuzz_sync_response.c

static void smart_fuzz_sync_response(Messenger *m, GC_Chat *chat)
{
    uint8_t data[MAX_GC_PACKET_SIZE];
    U32_to_bytes(data, chat->self_public_key_hash);
    uint32_t length = HASH_ID_BYTES;

    size_t packed_addrs_size = (ENC_PUBLIC_KEY + sizeof(IP_Port)) * (chat->numpeers - 1);

    if (HASH_ID_BYTES + packed_addrs_size > sizeof(data))
        return;

    GC_PeerAddress peer_addrs[chat->numpeers - 1];

    uint32_t i, num = 0;

    GC_PeerAddress self_addr;
    memcpy(&self_addr.public_key, chat->self_public_key, ENC_PUBLIC_KEY);
    ipport_self_copy(m->dht, &self_addr.ip_port);
    copy_gc_peer_addr(&peer_addrs[num++], &self_addr);

    for (i = 1; i < chat->numpeers; ++i) {
        if (chat->gcc[i].confirmed)
            copy_gc_peer_addr(&peer_addrs[num++], &chat->gcc[i].addr);
    }

    U32_to_bytes(data + length, num);
    length += sizeof(uint32_t);

    int addrs_len = pack_gc_addresses(data + length, sizeof(data) - length, peer_addrs, num);
    length += addrs_len;

    if (addrs_len <= 0)
        return;

    length = fuzz_gc_packet(data, length, random_int_range(3), sizeof(data));
    send_gc_packet_all_peers(chat, data, length, GP_SYNC_RESPONSE);
}