linux/net/atm/pvc.c
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   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
  20static int pvc_shutdown(struct socket *sock,int how)
  21{
  22        return 0;
  23}
  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)) 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);
  49out:
  50        release_sock(sk);
  51        return error;
  52}
  53
  54
  55static 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
  61static 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
  74static 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
  87static 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
 104static 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
 130static 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
 140static 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
 152int __init atmpvc_init(void)
 153{
 154        return sock_register(&pvc_family_ops);
 155}
 156
 157void atmpvc_exit(void)
 158{
 159        sock_unregister(PF_ATMPVC);
 160}
 161