1/* net/atm/pvc.c - ATM PVC sockets */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6#include <linux/net.h>		/* struct socket, struct proto_ops */
7#include <linux/atm.h>		/* ATM stuff */
8#include <linux/atmdev.h>	/* ATM devices */
9#include <linux/errno.h>	/* error codes */
10#include <linux/kernel.h>	/* printk */
11#include <linux/init.h>
12#include <linux/skbuff.h>
13#include <linux/bitops.h>
14#include <net/sock.h>		/* for sock_no_* */
15
16#include "resources.h"		/* devs and vccs */
17#include "common.h"		/* common for PVCs and SVCs */
18
19
20static int pvc_shutdown(struct socket *sock,int how)
21{
22	return 0;
23}
24
25
26static int pvc_bind(struct socket *sock,struct sockaddr *sockaddr,
27    int sockaddr_len)
28{
29	struct sock *sk = sock->sk;
30	struct sockaddr_atmpvc *addr;
31	struct atm_vcc *vcc;
32	int error;
33
34	if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) return -EINVAL;
35	addr = (struct sockaddr_atmpvc *) sockaddr;
36	if (addr->sap_family != AF_ATMPVC) return -EAFNOSUPPORT;
37	lock_sock(sk);
38	vcc = ATM_SD(sock);
39	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
40		error = -EBADFD;
41		goto out;
42	}
43	if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
44		if (vcc->vpi != ATM_VPI_UNSPEC) addr->sap_addr.vpi = vcc->vpi;
45		if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci;
46	}
47	error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
48			    addr->sap_addr.vci);
49out:
50	release_sock(sk);
51	return error;
52}
53
54
55static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr,
56    int sockaddr_len,int flags)
57{
58	return pvc_bind(sock,sockaddr,sockaddr_len);
59}
60
61static int pvc_setsockopt(struct socket *sock, int level, int optname,
62			  char __user *optval, int optlen)
63{
64	struct sock *sk = sock->sk;
65	int error;
66
67	lock_sock(sk);
68	error = vcc_setsockopt(sock, level, optname, optval, optlen);
69	release_sock(sk);
70	return error;
71}
72
73
74static int pvc_getsockopt(struct socket *sock, int level, int optname,
75			  char __user *optval, int __user *optlen)
76{
77	struct sock *sk = sock->sk;
78	int error;
79
80	lock_sock(sk);
81	error = vcc_getsockopt(sock, level, optname, optval, optlen);
82	release_sock(sk);
83	return error;
84}
85
86
87static int pvc_getname(struct socket *sock,struct sockaddr *sockaddr,
88    int *sockaddr_len,int peer)
89{
90	struct sockaddr_atmpvc *addr;
91	struct atm_vcc *vcc = ATM_SD(sock);
92
93	if (!vcc->dev || !test_bit(ATM_VF_ADDR,&vcc->flags)) return -ENOTCONN;
94	*sockaddr_len = sizeof(struct sockaddr_atmpvc);
95	addr = (struct sockaddr_atmpvc *) sockaddr;
96	addr->sap_family = AF_ATMPVC;
97	addr->sap_addr.itf = vcc->dev->number;
98	addr->sap_addr.vpi = vcc->vpi;
99	addr->sap_addr.vci = vcc->vci;
100	return 0;
101}
102
103
104static const struct proto_ops pvc_proto_ops = {
105	.family =	PF_ATMPVC,
106	.owner =	THIS_MODULE,
107
108	.release =	vcc_release,
109	.bind =		pvc_bind,
110	.connect =	pvc_connect,
111	.socketpair =	sock_no_socketpair,
112	.accept =	sock_no_accept,
113	.getname =	pvc_getname,
114	.poll =		vcc_poll,
115	.ioctl =	vcc_ioctl,
116	.listen =	sock_no_listen,
117	.shutdown =	pvc_shutdown,
118	.setsockopt =	pvc_setsockopt,
119	.getsockopt =	pvc_getsockopt,
120	.sendmsg =	vcc_sendmsg,
121	.recvmsg =	vcc_recvmsg,
122	.mmap =		sock_no_mmap,
123	.sendpage =	sock_no_sendpage,
124};
125
126
127static int pvc_create(struct socket *sock,int protocol)
128{
129	sock->ops = &pvc_proto_ops;
130	return vcc_create(sock, protocol, PF_ATMPVC);
131}
132
133
134static struct net_proto_family pvc_family_ops = {
135	.family = PF_ATMPVC,
136	.create = pvc_create,
137	.owner = THIS_MODULE,
138};
139
140
141/*
142 *	Initialize the ATM PVC protocol family
143 */
144
145
146int __init atmpvc_init(void)
147{
148	return sock_register(&pvc_family_ops);
149}
150
151void atmpvc_exit(void)
152{
153	sock_unregister(PF_ATMPVC);
154}
155