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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* net/atm/pvc.c - ATM PVC sockets */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#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>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040014#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#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
Joe Perches6b6dd492010-01-26 11:40:14 +000021static int pvc_shutdown(struct socket *sock, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022{
23 return 0;
24}
25
Joe Perches6b6dd492010-01-26 11:40:14 +000026static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
27 int sockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070028{
29 struct sock *sk = sock->sk;
30 struct sockaddr_atmpvc *addr;
31 struct atm_vcc *vcc;
32 int error;
33
Joe Perches6b6dd492010-01-26 11:40:14 +000034 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 lock_sock(sk);
40 vcc = ATM_SD(sock);
41 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
42 error = -EBADFD;
43 goto out;
44 }
Joe Perches6b6dd492010-01-26 11:40:14 +000045 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 }
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
Joe Perches6b6dd492010-01-26 11:40:14 +000058static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
59 int sockaddr_len, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
Joe Perches6b6dd492010-01-26 11:40:14 +000061 return pvc_bind(sock, sockaddr, sockaddr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062}
63
64static int pvc_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -070065 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070076static int pvc_getsockopt(struct socket *sock, int level, int optname,
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090077 char __user *optval, int __user *optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078{
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
Joe Perches6b6dd492010-01-26 11:40:14 +000088static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
89 int *sockaddr_len, int peer)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 struct sockaddr_atmpvc *addr;
92 struct atm_vcc *vcc = ATM_SD(sock);
93
Joe Perches6b6dd492010-01-26 11:40:14 +000094 if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
95 return -ENOTCONN;
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090096 *sockaddr_len = sizeof(struct sockaddr_atmpvc);
Joe Perches6b6dd492010-01-26 11:40:14 +000097 addr = (struct sockaddr_atmpvc *)sockaddr;
Mathias Krause3c0c5cf2012-08-15 11:31:45 +000098 memset(addr, 0, sizeof(*addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 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
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800106static const struct proto_ops pvc_proto_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 .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,
David Woodhouse8865c412008-12-03 22:12:38 -0800118#ifdef CONFIG_COMPAT
119 .compat_ioctl = vcc_compat_ioctl,
120#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 .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
Eric Paris3f378b62009-11-05 22:18:14 -0800132static int pvc_create(struct net *net, struct socket *sock, int protocol,
133 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134{
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -0700135 if (net != &init_net)
136 return -EAFNOSUPPORT;
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 sock->ops = &pvc_proto_ops;
Eric W. Biederman11aa9c22015-05-08 21:09:13 -0500139 return vcc_create(net, sock, protocol, PF_ATMPVC, kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140}
141
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +0000142static const struct net_proto_family pvc_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 .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}