/**
* llc_ui_accept - accept a new incoming connection.
* @sock: Socket which connections arrive on.
* @newsock: Socket to move incoming connection to.
* @flags: User specified operational flags.
*
* Accept a new incoming connection.
* Returns 0 upon success, negative otherwise.
*/
static int llc_ui_accept(struct socket *sock, struct socket *newsock, int flags)
{
struct sock *sk = sock->sk, *newsk;
struct llc_opt *llc, *newllc;
struct sk_buff *skb;
int rc = -EOPNOTSUPP;
dprintk("%s: accepting on %02X\n", __FUNCTION__,
llc_sk(sk)->laddr.lsap);
lock_sock(sk);
if (sk->sk_type != SOCK_STREAM)
goto out;
rc = -EINVAL;
if (sock->state != SS_UNCONNECTED || sk->sk_state != TCP_LISTEN)
goto out;
/* wait for a connection to arrive. */
rc = llc_ui_wait_for_data(sk, sk->sk_rcvtimeo);
if (rc)
goto out;
dprintk("%s: got a new connection on %02X\n", __FUNCTION__,
llc_sk(sk)->laddr.lsap);
skb = skb_dequeue(&sk->sk_receive_queue);
rc = -EINVAL;
if (!skb->sk)
goto frees;
rc = 0;
newsk = skb->sk;
/* attach connection to a new socket. */
llc_ui_sk_init(newsock, newsk);
newsk->sk_pair = NULL;
newsk->sk_zapped = 0;
newsk->sk_state = TCP_ESTABLISHED;
newsock->state = SS_CONNECTED;
llc = llc_sk(sk);
newllc = llc_sk(newsk);
memcpy(&newllc->addr, &llc->addr, sizeof(newllc->addr));
newllc->link = llc_ui_next_link_no(newllc->laddr.lsap);
/* put original socket back into a clean listen state. */
sk->sk_state = TCP_LISTEN;
sk->sk_ack_backlog--;
skb->sk = NULL;
dprintk("%s: ok success on %02X, client on %02X\n", __FUNCTION__,
llc_sk(sk)->addr.sllc_sap, newllc->daddr.lsap);
frees:
kfree_skb(skb);
out:
release_sock(sk);
return rc;
}
/**
* llc_ui_create - alloc and init a new llc_ui socket
* @sock: Socket to initialize and attach allocated sk to.
* @protocol: Unused.
*
* Allocate and initialize a new llc_ui socket, validate the user wants a
* socket type we have available.
* Returns 0 upon success, negative upon failure.
*/
static int llc_ui_create(struct socket *sock, int protocol)
{
struct sock *sk;
int rc = -ESOCKTNOSUPPORT;
if (sock->type == SOCK_DGRAM || sock->type == SOCK_STREAM) {
rc = -ENOMEM;
sk = llc_sk_alloc(PF_LLC, GFP_KERNEL, &llc_proto);
if (sk) {
rc = 0;
llc_ui_sk_init(sock, sk);
}
}
return rc;
}
/**
* llc_ui_create - alloc and init a new llc_ui socket
* @net: network namespace (must be default network)
* @sock: Socket to initialize and attach allocated sk to.
* @protocol: Unused.
* @kern: on behalf of kernel or userspace
*
* Allocate and initialize a new llc_ui socket, validate the user wants a
* socket type we have available.
* Returns 0 upon success, negative upon failure.
*/
static int llc_ui_create(struct net *net, struct socket *sock, int protocol,
int kern)
{
struct sock *sk;
int rc = -ESOCKTNOSUPPORT;
if (!capable(CAP_NET_RAW))
return -EPERM;
if (!net_eq(net, &init_net))
return -EAFNOSUPPORT;
if (likely(sock->type == SOCK_DGRAM || sock->type == SOCK_STREAM)) {
rc = -ENOMEM;
sk = llc_sk_alloc(net, PF_LLC, GFP_KERNEL, &llc_proto);
if (sk) {
rc = 0;
llc_ui_sk_init(sock, sk);
}
}
return rc;
}
