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
25static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
26		    int sockaddr_len)
27{
28	struct sock *sk = sock->sk;
29	struct sockaddr_atmpvc *addr;
30	struct atm_vcc *vcc;
31	int error;
32
33	if (sockaddr_len != sizeof(struct sockaddr_atmpvc))
34		return -EINVAL;
35	addr = (struct sockaddr_atmpvc *)sockaddr;
36	if (addr->sap_family != AF_ATMPVC)
37		return -EAFNOSUPPORT;
38	lock_sock(sk);
39	vcc = ATM_SD(sock);
40	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
41		error = -EBADFD;
42		goto out;
43	}
44	if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
45		if (vcc->vpi != ATM_VPI_UNSPEC)
46			addr->sap_addr.vpi = vcc->vpi;
47		if (vcc->vci != ATM_VCI_UNSPEC)
48			addr->sap_addr.vci = vcc->vci;
49	}
50	error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
51			    addr->sap_addr.vci);
52out:
53	release_sock(sk);
54	return error;
55}
56
57static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
58		       int sockaddr_len, int flags)
59{
60	return pvc_bind(sock, sockaddr, sockaddr_len);
61}
62
63static int pvc_setsockopt(struct socket *sock, int level, int optname,
64			  char __user *optval, unsigned int optlen)
65{
66	struct sock *sk = sock->sk;
67	int error;
68
69	lock_sock(sk);
70	error = vcc_setsockopt(sock, level, optname, optval, optlen);
71	release_sock(sk);
72	return error;
73}
74
75static int pvc_getsockopt(struct socket *sock, int level, int optname,
76			  char __user *optval, int __user *optlen)
77{
78	struct sock *sk = sock->sk;
79	int error;
80
81	lock_sock(sk);
82	error = vcc_getsockopt(sock, level, optname, optval, optlen);
83	release_sock(sk);
84	return error;
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))
94		return -ENOTCONN;
95	*sockaddr_len = sizeof(struct sockaddr_atmpvc);
96	addr = (struct sockaddr_atmpvc *)sockaddr;
97	addr->sap_family = AF_ATMPVC;
98	addr->sap_addr.itf = vcc->dev->number;
99	addr->sap_addr.vpi = vcc->vpi;
100	addr->sap_addr.vci = vcc->vci;
101	return 0;
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#ifdef CONFIG_COMPAT
117	.compat_ioctl = vcc_compat_ioctl,
118#endif
119	.listen =	sock_no_listen,
120	.shutdown =	pvc_shutdown,
121	.setsockopt =	pvc_setsockopt,
122	.getsockopt =	pvc_getsockopt,
123	.sendmsg =	vcc_sendmsg,
124	.recvmsg =	vcc_recvmsg,
125	.mmap =		sock_no_mmap,
126	.sendpage =	sock_no_sendpage,
127};
128
129
130static int pvc_create(struct net *net, struct socket *sock, int protocol,
131		      int kern)
132{
133	if (net != &init_net)
134		return -EAFNOSUPPORT;
135
136	sock->ops = &pvc_proto_ops;
137	return vcc_create(net, sock, protocol, PF_ATMPVC);
138}
139
140static const struct net_proto_family pvc_family_ops = {
141	.family = PF_ATMPVC,
142	.create = pvc_create,
143	.owner = THIS_MODULE,
144};
145
146
147/*
148 *	Initialize the ATM PVC protocol family
149 */
150
151
152int __init atmpvc_init(void)
153{
154	return sock_register(&pvc_family_ops);
155}
156
157void atmpvc_exit(void)
158{
159	sock_unregister(PF_ATMPVC);
160}
161