static void do_TCP_confirmed(TCP_Server *TCP_server)
{
uint32_t i;
for (i = 0; i < TCP_server->size_accepted_connections; ++i) {
TCP_Secure_Connection *conn = &TCP_server->accepted_connection_array[i];
if (conn->status != TCP_STATUS_CONFIRMED)
continue;
if (is_timeout(conn->last_pinged, TCP_PING_FREQUENCY)) {
uint8_t ping[1 + sizeof(uint64_t)];
ping[0] = TCP_PACKET_PING;
uint64_t ping_id = random_64b();
if (!ping_id)
++ping_id;
memcpy(ping + 1, &ping_id, sizeof(uint64_t));
int ret = write_packet_TCP_secure_connection(conn, ping, sizeof(ping));
if (ret == 1) {
conn->last_pinged = unix_time();
conn->ping_id = ping_id;
}
}
if (conn->ping_id && is_timeout(conn->last_pinged, TCP_PING_TIMEOUT)) {
kill_TCP_connection(conn);
del_accepted(TCP_server, i);
continue;
}
send_pending_data(conn);
uint8_t packet[MAX_PACKET_SIZE];
int len;
while ((len = read_packet_TCP_secure_connection(conn->sock, &conn->next_packet_length, conn->shared_key,
conn->recv_nonce, packet, sizeof(packet)))) {
if (len == -1) {
kill_TCP_connection(conn);
del_accepted(TCP_server, i);
break;
}
if (handle_TCP_packet(TCP_server, i, packet, len) == -1) {
kill_TCP_connection(conn);
del_accepted(TCP_server, i);
break;
}
}
}
}
static int confirm_TCP_connection(TCP_Server *TCP_server, TCP_Secure_Connection *con, uint8_t *data, uint16_t length)
{
int index = add_accepted(TCP_server, con);
if (index == -1)
return -1;
TCP_Secure_Connection *conn = &TCP_server->accepted_connection_array[index];
if (handle_TCP_packet(TCP_server, index, data, length) == -1) {
kill_TCP_connection(conn);
del_accepted(TCP_server, index);
}
return 0;
}
/* Kill an accepted TCP_Secure_Connection
*
* return -1 on failure.
* return 0 on success.
*/
static int kill_accepted(TCP_Server *TCP_server, int index)
{
if ((uint32_t)index >= TCP_server->size_accepted_connections)
return -1;
uint32_t i;
for (i = 0; i < NUM_CLIENT_CONNECTIONS; ++i) {
rm_connection_index(TCP_server, &TCP_server->accepted_connection_array[index], i);
}
sock_t sock = TCP_server->accepted_connection_array[index].sock;
if (del_accepted(TCP_server, index) != 0)
return -1;
kill_sock(sock);
return 0;
}
