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 <linux/export.h>
15#include <net/sock.h>		/* for sock_no_* */
16
17#include "resources.h"		/* devs and vccs */
18#include "common.h"		/* common for PVCs and SVCs */
19
20
21static int pvc_shutdown(struct socket *sock, int how)
22{
23	return 0;
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))
35		return -EINVAL;
36	addr = (struct sockaddr_atmpvc *)sockaddr;
37	if (addr->sap_family != AF_ATMPVC)
38		return -EAFNOSUPPORT;
39	lock_sock(sk);
40	vcc = ATM_SD(sock);
41	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
42		error = -EBADFD;
43		goto out;
44	}
45	if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
46		if (vcc->vpi != ATM_VPI_UNSPEC)
47			addr->sap_addr.vpi = vcc->vpi;
48		if (vcc->vci != ATM_VCI_UNSPEC)
49			addr->sap_addr.vci = vcc->vci;
50	}
51	error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
52			    addr->sap_addr.vci);
53out:
54	release_sock(sk);
55	return error;
56}
57
58static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
59		       int sockaddr_len, int flags)
60{
61	return pvc_bind(sock, sockaddr, sockaddr_len);
62}
63
64static int pvc_setsockopt(struct socket *sock, int level, int optname,
65			  char __user *optval, unsigned int optlen)
66{
67	struct sock *sk = sock->sk;
68	int error;
69
70	lock_sock(sk);
71	error = vcc_setsockopt(sock, level, optname, optval, optlen);
72	release_sock(sk);
73	return error;
74}
75
76static int pvc_getsockopt(struct socket *sock, int level, int optname,
77			  char __user *optval, int __user *optlen)
78{
79	struct sock *sk = sock->sk;
80	int error;
81
82	lock_sock(sk);
83	error = vcc_getsockopt(sock, level, optname, optval, optlen);
84	release_sock(sk);
85	return error;
86}
87
88static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
89		       int *sockaddr_len, int peer)
90{
91	struct sockaddr_atmpvc *addr;
92	struct atm_vcc *vcc = ATM_SD(sock);
93
94	if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
95		return -ENOTCONN;
96	*sockaddr_len = sizeof(struct sockaddr_atmpvc);
97	addr = (struct sockaddr_atmpvc *)sockaddr;
98	memset(addr, 0, sizeof(*addr));
99	addr->sap_family = AF_ATMPVC;
100	addr->sap_addr.itf = vcc->dev->number;
101	addr->sap_addr.vpi = vcc->vpi;
102	addr->sap_addr.vci = vcc->vci;
103	return 0;
104}
105
106static const struct proto_ops pvc_proto_ops = {
107	.family =	PF_ATMPVC,
108	.owner =	THIS_MODULE,
109
110	.release =	vcc_release,
111	.bind =		pvc_bind,
112	.connect =	pvc_connect,
113	.socketpair =	sock_no_socketpair,
114	.accept =	sock_no_accept,
115	.getname =	pvc_getname,
116	.poll =		vcc_poll,
117	.ioctl =	vcc_ioctl,
118#ifdef CONFIG_COMPAT
119	.compat_ioctl = vcc_compat_ioctl,
120#endif
121	.listen =	sock_no_listen,
122	.shutdown =	pvc_shutdown,
123	.setsockopt =	pvc_setsockopt,
124	.getsockopt =	pvc_getsockopt,
125	.sendmsg =	vcc_sendmsg,
126	.recvmsg =	vcc_recvmsg,
127	.mmap =		sock_no_mmap,
128	.sendpage =	sock_no_sendpage,
129};
130
131
132static int pvc_create(struct net *net, struct socket *sock, int protocol,
133		      int kern)
134{
135	if (net != &init_net)
136		return -EAFNOSUPPORT;
137
138	sock->ops = &pvc_proto_ops;
139	return vcc_create(net, sock, protocol, PF_ATMPVC);
140}
141
142static const struct net_proto_family pvc_family_ops = {
143	.family = PF_ATMPVC,
144	.create = pvc_create,
145	.owner = THIS_MODULE,
146};
147
148
149/*
150 *	Initialize the ATM PVC protocol family
151 */
152
153
154int __init atmpvc_init(void)
155{
156	return sock_register(&pvc_family_ops);
157}
158
159void atmpvc_exit(void)
160{
161	sock_unregister(PF_ATMPVC);
162}
163