tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 addr->sap_family = AF_ATMPVC;
99 addr->sap_addr.itf = vcc->dev->number;
100 addr->sap_addr.vpi = vcc->vpi;
101 addr->sap_addr.vci = vcc->vci;
102 return 0;
103}
104
105static const struct proto_ops pvc_proto_ops = {
106 .family = PF_ATMPVC,
107 .owner = THIS_MODULE,
108
109 .release = vcc_release,
110 .bind = pvc_bind,
111 .connect = pvc_connect,
112 .socketpair = sock_no_socketpair,
113 .accept = sock_no_accept,
114 .getname = pvc_getname,
115 .poll = vcc_poll,
116 .ioctl = vcc_ioctl,
117#ifdef CONFIG_COMPAT
118 .compat_ioctl = vcc_compat_ioctl,
119#endif
120 .listen = sock_no_listen,
121 .shutdown = pvc_shutdown,
122 .setsockopt = pvc_setsockopt,
123 .getsockopt = pvc_getsockopt,
124 .sendmsg = vcc_sendmsg,
125 .recvmsg = vcc_recvmsg,
126 .mmap = sock_no_mmap,
127 .sendpage = sock_no_sendpage,
128};
129
130
131static int pvc_create(struct net *net, struct socket *sock, int protocol,
132 int kern)
133{
134 if (net != &init_net)
135 return -EAFNOSUPPORT;
136
137 sock->ops = &pvc_proto_ops;
138 return vcc_create(net, sock, protocol, PF_ATMPVC);
139}
140
141static const struct net_proto_family pvc_family_ops = {
142 .family = PF_ATMPVC,
143 .create = pvc_create,
144 .owner = THIS_MODULE,
145};
146
147
148/*
149 * Initialize the ATM PVC protocol family
150 */
151
152
153int __init atmpvc_init(void)
154{
155 return sock_register(&pvc_family_ops);
156}
157
158void atmpvc_exit(void)
159{
160 sock_unregister(PF_ATMPVC);
161}