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 2008-10-05 11:14:48 -07:00 committed by David S. Miller
parent 25532824fb
commit 9995a32b4d
2 changed files with 140 additions and 0 deletions

43
include/net/phonet/pep.h Normal file
View file

@ -0,0 +1,43 @@
/*
* File: pep.h
*
* Phonet Pipe End Point sockets definitions
*
* Copyright (C) 2008 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef NET_PHONET_PEP_H
#define NET_PHONET_PEP_H
struct pep_sock {
struct pn_sock pn_sk;
/* Listening socket stuff: */
struct hlist_head ackq;
/* Connected socket stuff: */
u8 tx_credits;
};
static inline struct pep_sock *pep_sk(struct sock *sk)
{
return (struct pep_sock *)sk;
}
extern const struct proto_ops phonet_stream_ops;
#endif

View file

@ -25,11 +25,13 @@
#include <linux/kernel.h>
#include <linux/net.h>
#include <linux/poll.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/phonet.h>
#include <net/phonet/phonet.h>
#include <net/phonet/pep.h>
#include <net/phonet/pn_dev.h>
static int pn_socket_release(struct socket *sock)
@ -166,6 +168,24 @@ static int pn_socket_autobind(struct socket *sock)
return 0; /* socket was already bound */
}
static int pn_socket_accept(struct socket *sock, struct socket *newsock,
int flags)
{
struct sock *sk = sock->sk;
struct sock *newsk;
int err;
newsk = sk->sk_prot->accept(sk, flags, &err);
if (!newsk)
return err;
lock_sock(newsk);
sock_graft(newsk, newsock);
newsock->state = SS_CONNECTED;
release_sock(newsk);
return 0;
}
static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
int *sockaddr_len, int peer)
{
@ -182,6 +202,33 @@ static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
return 0;
}
static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
poll_table *wait)
{
struct sock *sk = sock->sk;
struct pep_sock *pn = pep_sk(sk);
unsigned int mask = 0;
poll_wait(file, &sock->wait, wait);
switch (sk->sk_state) {
case TCP_LISTEN:
return hlist_empty(&pn->ackq) ? 0 : POLLIN;
case TCP_CLOSE:
return POLLERR;
}
if (!skb_queue_empty(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
else if (sk->sk_state == TCP_CLOSE_WAIT)
return POLLHUP;
if (sk->sk_state == TCP_ESTABLISHED && pn->tx_credits)
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
return mask;
}
static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
@ -220,6 +267,30 @@ static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
return sk->sk_prot->ioctl(sk, cmd, arg);
}
static int pn_socket_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
int err = 0;
if (sock->state != SS_UNCONNECTED)
return -EINVAL;
if (pn_socket_autobind(sock))
return -ENOBUFS;
lock_sock(sk);
if (sk->sk_state != TCP_CLOSE) {
err = -EINVAL;
goto out;
}
sk->sk_state = TCP_LISTEN;
sk->sk_ack_backlog = 0;
sk->sk_max_ack_backlog = backlog;
out:
release_sock(sk);
return err;
}
static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len)
{
@ -256,6 +327,32 @@ const struct proto_ops phonet_dgram_ops = {
.sendpage = sock_no_sendpage,
};
const struct proto_ops phonet_stream_ops = {
.family = AF_PHONET,
.owner = THIS_MODULE,
.release = pn_socket_release,
.bind = pn_socket_bind,
.connect = sock_no_connect,
.socketpair = sock_no_socketpair,
.accept = pn_socket_accept,
.getname = pn_socket_getname,
.poll = pn_socket_poll,
.ioctl = pn_socket_ioctl,
.listen = pn_socket_listen,
.shutdown = sock_no_shutdown,
.setsockopt = sock_no_setsockopt,
.getsockopt = sock_no_getsockopt,
#ifdef CONFIG_COMPAT
.compat_setsockopt = sock_no_setsockopt,
.compat_getsockopt = compat_sock_no_getsockopt,
#endif
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
EXPORT_SYMBOL(phonet_stream_ops);
static DEFINE_MUTEX(port_mutex);
/* allocate port for a socket */