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 net_proto,
8 struct proto_ops */
9 #include <linux/atm.h> /* ATM stuff */
10 #include <linux/atmdev.h> /* ATM devices */
11 #include <linux/errno.h> /* error codes */
12 #include <linux/kernel.h> /* printk */
13 #include <linux/init.h>
14 #include <linux/skbuff.h>
15 #include <linux/bitops.h>
16 #include <net/sock.h> /* for sock_no_* */
17
18 #include "resources.h" /* devs and vccs */
19 #include "common.h" /* common for PVCs and SVCs */
20
21
pvc_shutdown(struct socket * sock,int how)22 static int pvc_shutdown(struct socket *sock,int how)
23 {
24 return 0;
25 }
26
27
pvc_bind(struct socket * sock,struct sockaddr * sockaddr,int sockaddr_len)28 static int pvc_bind(struct socket *sock,struct sockaddr *sockaddr,
29 int sockaddr_len)
30 {
31 struct sock *sk = sock->sk;
32 struct sockaddr_atmpvc *addr;
33 struct atm_vcc *vcc;
34 int error;
35
36 if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) return -EINVAL;
37 addr = (struct sockaddr_atmpvc *) sockaddr;
38 if (addr->sap_family != AF_ATMPVC) 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) addr->sap_addr.vpi = vcc->vpi;
47 if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci;
48 }
49 error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
50 addr->sap_addr.vci);
51 out:
52 release_sock(sk);
53 return error;
54 }
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 * optval,int optlen)63 static int pvc_setsockopt(struct socket *sock, int level, int optname,
64 char *optval, 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
75
pvc_getsockopt(struct socket * sock,int level,int optname,char * optval,int * optlen)76 static int pvc_getsockopt(struct socket *sock, int level, int optname,
77 char *optval, int *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
88
pvc_getname(struct socket * sock,struct sockaddr * sockaddr,int * sockaddr_len,int peer)89 static int pvc_getname(struct socket *sock,struct sockaddr *sockaddr,
90 int *sockaddr_len,int peer)
91 {
92 struct sockaddr_atmpvc *addr;
93 struct atm_vcc *vcc = ATM_SD(sock);
94
95 if (!vcc->dev || !test_bit(ATM_VF_ADDR,&vcc->flags)) 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
105
106 static struct proto_ops pvc_proto_ops = {
107 .family = PF_ATMPVC,
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 = atm_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
pvc_create(struct socket * sock,int protocol)128 static 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
135 static struct net_proto_family pvc_family_ops = {
136 PF_ATMPVC,
137 pvc_create,
138 0, /* no authentication */
139 0, /* no encryption */
140 0 /* no encrypt_net */
141 };
142
143
144 /*
145 * Initialize the ATM PVC protocol family
146 */
147
148
atmpvc_init(void)149 int atmpvc_init(void)
150 {
151 return sock_register(&pvc_family_ops);
152 }
153
atmpvc_exit(void)154 void atmpvc_exit(void)
155 {
156 sock_unregister(PF_ATMPVC);
157 }
158