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
20 static int pvc_shutdown(struct socket *sock,int how)
21 {
22 return 0;
23 }
24
25
26 static 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)) return -EINVAL;
35 addr = (struct sockaddr_atmpvc *) sockaddr;
36 if (addr->sap_family != AF_ATMPVC) return -EAFNOSUPPORT;
37 lock_sock(sk);
38 vcc = ATM_SD(sock);
39 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
40 error = -EBADFD;
41 goto out;
42 }
43 if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
44 if (vcc->vpi != ATM_VPI_UNSPEC) addr->sap_addr.vpi = vcc->vpi;
45 if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci;
46 }
47 error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
48 addr->sap_addr.vci);
49 out:
50 release_sock(sk);
51 return error;
52 }
53
54
55 static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr,
56 int sockaddr_len,int flags)
57 {
58 return pvc_bind(sock,sockaddr,sockaddr_len);
59 }
60
61 static int pvc_setsockopt(struct socket *sock, int level, int optname,
62 char __user *optval, int optlen)
63 {
64 struct sock *sk = sock->sk;
65 int error;
66
67 lock_sock(sk);
68 error = vcc_setsockopt(sock, level, optname, optval, optlen);
69 release_sock(sk);
70 return error;
71 }
72
73
74 static int pvc_getsockopt(struct socket *sock, int level, int optname,
75 char __user *optval, int __user *optlen)
76 {
77 struct sock *sk = sock->sk;
78 int error;
79
80 lock_sock(sk);
81 error = vcc_getsockopt(sock, level, optname, optval, optlen);
82 release_sock(sk);
83 return error;
84 }
85
86
87 static 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)) return -ENOTCONN;
94 *sockaddr_len = sizeof(struct sockaddr_atmpvc);
95 addr = (struct sockaddr_atmpvc *) sockaddr;
96 addr->sap_family = AF_ATMPVC;
97 addr->sap_addr.itf = vcc->dev->number;
98 addr->sap_addr.vpi = vcc->vpi;
99 addr->sap_addr.vci = vcc->vci;
100 return 0;
101 }
102
103
104 static 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
130 static int pvc_create(struct net *net, struct socket *sock,int protocol)
131 {
132 if (net != &init_net)
133 return -EAFNOSUPPORT;
134
135 sock->ops = &pvc_proto_ops;
136 return vcc_create(net, sock, protocol, PF_ATMPVC);
137 }
138
139
140 static 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
152 int __init atmpvc_init(void)
153 {
154 return sock_register(&pvc_family_ops);
155 }
156
157 void atmpvc_exit(void)
158 {
159 sock_unregister(PF_ATMPVC);
160 }
161
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