/**
* 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_connect - Connect to a remote llc2 mac + sap.
* @sock: Socket which will be connected to the remote destination.
* @uaddr: Remote and possibly the local address of the new connection.
* @addrlen: Size of uaddr structure.
* @flags: Operational flags specified by the user.
*
* Connect to a remote llc2 mac + sap. The caller must specify the
* destination mac and address to connect to. If the user hasn't previously
* called bind(2) with a smac the address of the first interface of the
* specified arp type will be used.
* This function will autobind if user did not previously call bind.
* Returns: 0 upon success, negative otherwise.
*/
static int llc_ui_connect(struct socket *sock, struct sockaddr *uaddr,
int addrlen, int flags)
{
struct sock *sk = sock->sk;
struct llc_sock *llc = llc_sk(sk);
struct sockaddr_llc *addr = (struct sockaddr_llc *)uaddr;
struct net_device *dev;
int rc = -EINVAL;
lock_sock(sk);
if (addrlen != sizeof(*addr))
goto out;
rc = -EAFNOSUPPORT;
if (addr->sllc_family != AF_LLC)
goto out;
/* bind connection to sap if user hasn't done it. */
if (sock_flag(sk, SOCK_ZAPPED)) {
/* bind to sap with null dev, exclusive */
rc = llc_ui_autobind(sock, addr);
if (rc)
goto out;
llc->daddr.lsap = addr->sllc_sap;
memcpy(llc->daddr.mac, addr->sllc_mac, IFHWADDRLEN);
}
dev = llc->dev;
if (sk->sk_type != SOCK_STREAM)
goto out;
rc = -EALREADY;
if (sock->state == SS_CONNECTING)
goto out;
sock->state = SS_CONNECTING;
sk->sk_state = TCP_SYN_SENT;
llc->link = llc_ui_next_link_no(llc->sap->laddr.lsap);
rc = llc_establish_connection(sk, dev->dev_addr,
addr->sllc_mac, addr->sllc_sap);
if (rc) {
dprintk("%s: llc_ui_send_conn failed :-(\n", __FUNCTION__);
sock->state = SS_UNCONNECTED;
sk->sk_state = TCP_CLOSE;
goto out;
}
rc = llc_ui_wait_for_conn(sk, sk->sk_rcvtimeo);
if (rc)
dprintk("%s: llc_ui_wait_for_conn failed=%d\n", __FUNCTION__, rc);
out:
release_sock(sk);
return rc;
}