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
pvc_shutdown(struct socket * sock,int how)20 static int pvc_shutdown(struct socket *sock, int how)
21 {
22 return 0;
23 }
24
pvc_bind(struct socket * sock,struct sockaddr * sockaddr,int sockaddr_len)25 static 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);
52 out:
53 release_sock(sk);
54 return error;
55 }
56
pvc_connect(struct socket * sock,struct sockaddr * sockaddr,int sockaddr_len,int flags)57 static 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
pvc_setsockopt(struct socket * sock,int level,int optname,char __user * optval,unsigned int optlen)63 static 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
pvc_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)75 static 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
pvc_getname(struct socket * sock,struct sockaddr * sockaddr,int * sockaddr_len,int peer)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))
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
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
pvc_create(struct net * net,struct socket * sock,int protocol,int kern)130 static 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
140 static 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
atmpvc_init(void)152 int __init atmpvc_init(void)
153 {
154 return sock_register(&pvc_family_ops);
155 }
156
atmpvc_exit(void)157 void atmpvc_exit(void)
158 {
159 sock_unregister(PF_ATMPVC);
160 }
161