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/config.h>
7#include <linux/net.h> /* struct socket, struct proto_ops */
8#include <linux/atm.h> /* ATM stuff */
9#include <linux/atmdev.h> /* ATM devices */
10#include <linux/errno.h> /* error codes */
11#include <linux/kernel.h> /* printk */
12#include <linux/init.h>
13#include <linux/skbuff.h>
14#include <linux/bitops.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
26
27static int pvc_bind(struct socket *sock,struct sockaddr *sockaddr,
28 int sockaddr_len)
29{
30 struct sock *sk = sock->sk;
31 struct sockaddr_atmpvc *addr;
32 struct atm_vcc *vcc;
33 int error;
34
35 if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) return -EINVAL;
36 addr = (struct sockaddr_atmpvc *) sockaddr;
37 if (addr->sap_family != AF_ATMPVC) 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) addr->sap_addr.vpi = vcc->vpi;
46 if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci;
47 }
48 error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
49 addr->sap_addr.vci);
50out:
51 release_sock(sk);
52 return error;
53}
54
55
56static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr,
57 int sockaddr_len,int flags)
58{
59 return pvc_bind(sock,sockaddr,sockaddr_len);
60}
61
62static int pvc_setsockopt(struct socket *sock, int level, int optname,
63 char __user *optval, int optlen)
64{
65 struct sock *sk = sock->sk;
66 int error;
67
68 lock_sock(sk);
69 error = vcc_setsockopt(sock, level, optname, optval, optlen);
70 release_sock(sk);
71 return error;
72}
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
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)) 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
104
105static 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 .listen = sock_no_listen,
118 .shutdown = pvc_shutdown,
119 .setsockopt = pvc_setsockopt,
120 .getsockopt = pvc_getsockopt,
121 .sendmsg = vcc_sendmsg,
122 .recvmsg = vcc_recvmsg,
123 .mmap = sock_no_mmap,
124 .sendpage = sock_no_sendpage,
125};
126
127
128static int pvc_create(struct socket *sock,int protocol)
129{
130 sock->ops = &pvc_proto_ops;
131 return vcc_create(sock, protocol, PF_ATMPVC);
132}
133
134
135static struct net_proto_family pvc_family_ops = {
136 .family = PF_ATMPVC,
137 .create = pvc_create,
138 .owner = THIS_MODULE,
139};
140
141
142/*
143 * Initialize the ATM PVC protocol family
144 */
145
146
147int __init atmpvc_init(void)
148{
149 return sock_register(&pvc_family_ops);
150}
151
152void atmpvc_exit(void)
153{
154 sock_unregister(PF_ATMPVC);
155}