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Phonet: connected sockets glue
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rémi Denis-Courmont
David S. Miller
parent
25532824fb
commit
9995a32b4d
43
include/net/phonet/pep.h
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43
include/net/phonet/pep.h
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@ -0,0 +1,43 @@
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/*
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* File: pep.h
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*
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* Phonet Pipe End Point sockets definitions
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*
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* Copyright (C) 2008 Nokia Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef NET_PHONET_PEP_H
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#define NET_PHONET_PEP_H
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struct pep_sock {
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struct pn_sock pn_sk;
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/* Listening socket stuff: */
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struct hlist_head ackq;
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/* Connected socket stuff: */
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u8 tx_credits;
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};
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static inline struct pep_sock *pep_sk(struct sock *sk)
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{
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return (struct pep_sock *)sk;
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}
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extern const struct proto_ops phonet_stream_ops;
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#endif
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@ -25,11 +25,13 @@
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#include <linux/kernel.h>
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#include <linux/net.h>
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#include <linux/poll.h>
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#include <net/sock.h>
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#include <net/tcp_states.h>
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#include <linux/phonet.h>
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#include <net/phonet/phonet.h>
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#include <net/phonet/pep.h>
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#include <net/phonet/pn_dev.h>
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static int pn_socket_release(struct socket *sock)
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@ -166,6 +168,24 @@ static int pn_socket_autobind(struct socket *sock)
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return 0; /* socket was already bound */
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}
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static int pn_socket_accept(struct socket *sock, struct socket *newsock,
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int flags)
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{
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struct sock *sk = sock->sk;
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struct sock *newsk;
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int err;
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newsk = sk->sk_prot->accept(sk, flags, &err);
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if (!newsk)
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return err;
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lock_sock(newsk);
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sock_graft(newsk, newsock);
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newsock->state = SS_CONNECTED;
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release_sock(newsk);
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return 0;
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}
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static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
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int *sockaddr_len, int peer)
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{
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@ -182,6 +202,33 @@ static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
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return 0;
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}
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static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
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poll_table *wait)
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{
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struct sock *sk = sock->sk;
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struct pep_sock *pn = pep_sk(sk);
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unsigned int mask = 0;
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poll_wait(file, &sock->wait, wait);
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switch (sk->sk_state) {
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case TCP_LISTEN:
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return hlist_empty(&pn->ackq) ? 0 : POLLIN;
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case TCP_CLOSE:
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return POLLERR;
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}
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if (!skb_queue_empty(&sk->sk_receive_queue))
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mask |= POLLIN | POLLRDNORM;
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else if (sk->sk_state == TCP_CLOSE_WAIT)
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return POLLHUP;
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if (sk->sk_state == TCP_ESTABLISHED && pn->tx_credits)
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mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
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return mask;
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}
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static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
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unsigned long arg)
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{
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@ -220,6 +267,30 @@ static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
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return sk->sk_prot->ioctl(sk, cmd, arg);
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}
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static int pn_socket_listen(struct socket *sock, int backlog)
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{
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struct sock *sk = sock->sk;
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int err = 0;
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if (sock->state != SS_UNCONNECTED)
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return -EINVAL;
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if (pn_socket_autobind(sock))
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return -ENOBUFS;
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lock_sock(sk);
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if (sk->sk_state != TCP_CLOSE) {
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err = -EINVAL;
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goto out;
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}
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sk->sk_state = TCP_LISTEN;
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sk->sk_ack_backlog = 0;
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sk->sk_max_ack_backlog = backlog;
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out:
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release_sock(sk);
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return err;
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}
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static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock,
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struct msghdr *m, size_t total_len)
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{
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@ -256,6 +327,32 @@ const struct proto_ops phonet_dgram_ops = {
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.sendpage = sock_no_sendpage,
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};
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const struct proto_ops phonet_stream_ops = {
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.family = AF_PHONET,
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.owner = THIS_MODULE,
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.release = pn_socket_release,
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.bind = pn_socket_bind,
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.connect = sock_no_connect,
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.socketpair = sock_no_socketpair,
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.accept = pn_socket_accept,
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.getname = pn_socket_getname,
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.poll = pn_socket_poll,
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.ioctl = pn_socket_ioctl,
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.listen = pn_socket_listen,
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.shutdown = sock_no_shutdown,
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.setsockopt = sock_no_setsockopt,
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.getsockopt = sock_no_getsockopt,
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#ifdef CONFIG_COMPAT
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.compat_setsockopt = sock_no_setsockopt,
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.compat_getsockopt = compat_sock_no_getsockopt,
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#endif
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.sendmsg = pn_socket_sendmsg,
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.recvmsg = sock_common_recvmsg,
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.mmap = sock_no_mmap,
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.sendpage = sock_no_sendpage,
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};
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EXPORT_SYMBOL(phonet_stream_ops);
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static DEFINE_MUTEX(port_mutex);
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/* allocate port for a socket */
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