int tipc_net_start(u32 addr)
{
char addr_string[16];
int res;
if (tipc_mode != TIPC_NODE_MODE)
return -ENOPROTOOPT;
tipc_subscr_stop();
tipc_cfg_stop();
tipc_own_addr = addr;
tipc_mode = TIPC_NET_MODE;
tipc_named_reinit();
tipc_port_reinit();
if ((res = tipc_cltr_init()) ||
(res = tipc_bclink_init())) {
return res;
}
tipc_k_signal((Handler)tipc_subscr_start, 0);
tipc_k_signal((Handler)tipc_cfg_init, 0);
info("Started in network mode\n");
info("Own node address %s, network identity %u\n",
tipc_addr_string_fill(addr_string, tipc_own_addr), tipc_net_id);
return 0;
}
int tipc_core_start(void)
{
int res;
if (tipc_mode != TIPC_NOT_RUNNING)
return -ENOPROTOOPT;
get_random_bytes(&tipc_random, sizeof(tipc_random));
tipc_mode = TIPC_NODE_MODE;
if ((res = tipc_handler_start()) ||
(res = tipc_ref_table_init(tipc_max_ports, tipc_random)) ||
(res = tipc_reg_start()) ||
(res = tipc_nametbl_init()) ||
(res = tipc_k_signal((Handler)tipc_subscr_start, 0)) ||
(res = tipc_k_signal((Handler)tipc_cfg_init, 0)) ||
(res = tipc_netlink_start()) ||
(res = tipc_socket_init())) {
tipc_core_stop();
}
return res;
}
static int tipc_core_start(void)
{
int res;
get_random_bytes(&tipc_random, sizeof(tipc_random));
res = tipc_handler_start();
if (!res)
res = tipc_ref_table_init(tipc_max_ports, tipc_random);
if (!res)
res = tipc_nametbl_init();
if (!res)
res = tipc_k_signal((Handler)tipc_subscr_start, 0);
if (!res)
res = tipc_k_signal((Handler)tipc_cfg_init, 0);
if (!res)
res = tipc_netlink_start();
if (!res)
res = tipc_socket_init();
if (res)
tipc_core_stop();
return res;
}
static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf)
{
struct tipc_msg *msg = buf_msg(buf);
struct tipc_sock *tsock = (struct tipc_sock *)tport->usr_handle;
struct socket *sock;
u32 recv_q_len;
/* Reject message if socket is closing */
if (!tsock)
return TIPC_ERR_NO_PORT;
/* Reject message if it is wrong sort of message for socket */
/*
* WOULD IT BE BETTER TO JUST DISCARD THESE MESSAGES INSTEAD?
* "NO PORT" ISN'T REALLY THE RIGHT ERROR CODE, AND THERE MAY
* BE SECURITY IMPLICATIONS INHERENT IN REJECTING INVALID TRAFFIC
*/
sock = tsock->sk.sk_socket;
if (sock->state == SS_READY) {
if (msg_connected(msg)) {
msg_dbg(msg, "dispatch filter 1\n");
return TIPC_ERR_NO_PORT;
}
} else {
if (msg_mcast(msg)) {
msg_dbg(msg, "dispatch filter 2\n");
return TIPC_ERR_NO_PORT;
}
if (sock->state == SS_CONNECTED) {
if (!msg_connected(msg)) {
msg_dbg(msg, "dispatch filter 3\n");
return TIPC_ERR_NO_PORT;
}
}
else if (sock->state == SS_CONNECTING) {
if (!msg_connected(msg) && (msg_errcode(msg) == 0)) {
msg_dbg(msg, "dispatch filter 4\n");
return TIPC_ERR_NO_PORT;
}
}
else if (sock->state == SS_LISTENING) {
if (msg_connected(msg) || msg_errcode(msg)) {
msg_dbg(msg, "dispatch filter 5\n");
return TIPC_ERR_NO_PORT;
}
}
else if (sock->state == SS_DISCONNECTING) {
msg_dbg(msg, "dispatch filter 6\n");
return TIPC_ERR_NO_PORT;
}
else /* (sock->state == SS_UNCONNECTED) */ {
if (msg_connected(msg) || msg_errcode(msg)) {
msg_dbg(msg, "dispatch filter 7\n");
return TIPC_ERR_NO_PORT;
}
}
}
/* Reject message if there isn't room to queue it */
if (unlikely((u32)atomic_read(&tipc_queue_size) >
OVERLOAD_LIMIT_BASE)) {
if (queue_overloaded(atomic_read(&tipc_queue_size),
OVERLOAD_LIMIT_BASE, msg))
return TIPC_ERR_OVERLOAD;
}
recv_q_len = skb_queue_len(&tsock->sk.sk_receive_queue);
if (unlikely(recv_q_len > (OVERLOAD_LIMIT_BASE / 2))) {
if (queue_overloaded(recv_q_len,
OVERLOAD_LIMIT_BASE / 2, msg))
return TIPC_ERR_OVERLOAD;
}
/* Initiate connection termination for an incoming 'FIN' */
if (unlikely(msg_errcode(msg) && (sock->state == SS_CONNECTED))) {
sock->state = SS_DISCONNECTING;
/* Note: Use signal since port lock is already taken! */
tipc_k_signal((Handler)async_disconnect, tport->ref);
}
/* Enqueue message (finally!) */
msg_dbg(msg,"<DISP<: ");
TIPC_SKB_CB(buf)->handle = msg_data(msg);
atomic_inc(&tipc_queue_size);
skb_queue_tail(&sock->sk->sk_receive_queue, buf);
if (waitqueue_active(sock->sk->sk_sleep))
wake_up_interruptible(sock->sk->sk_sleep);
return TIPC_OK;
}
