LXR linux/net/atm/pvc.c

   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 <linux/export.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
  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))
  35                return -EINVAL;
  36        addr = (struct sockaddr_atmpvc *)sockaddr;
  37        if (addr->sap_family != AF_ATMPVC)
  38                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)
  47                        addr->sap_addr.vpi = vcc->vpi;
  48                if (vcc->vci != ATM_VCI_UNSPEC)
  49                        addr->sap_addr.vci = vcc->vci;
  50        }
  51        error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
  52                            addr->sap_addr.vci);
  53out:
  54        release_sock(sk);
  55        return error;
  56}
  57
  58static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
  59                       int sockaddr_len, int flags)
  60{
  61        return pvc_bind(sock, sockaddr, sockaddr_len);
  62}
  63
  64static int pvc_setsockopt(struct socket *sock, int level, int optname,
  65                          char __user *optval, unsigned int optlen)
  66{
  67        struct sock *sk = sock->sk;
  68        int error;
  69
  70        lock_sock(sk);
  71        error = vcc_setsockopt(sock, level, optname, optval, optlen);
  72        release_sock(sk);
  73        return error;
  74}
  75
  76static int pvc_getsockopt(struct socket *sock, int level, int optname,
  77                          char __user *optval, int __user *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
  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))
  95                return -ENOTCONN;
  96        *sockaddr_len = sizeof(struct sockaddr_atmpvc);
  97        addr = (struct sockaddr_atmpvc *)sockaddr;
  98        memset(addr, 0, sizeof(*addr));
  99        addr->sap_family = AF_ATMPVC;
 100        addr->sap_addr.itf = vcc->dev->number;
 101        addr->sap_addr.vpi = vcc->vpi;
 102        addr->sap_addr.vci = vcc->vci;
 103        return 0;
 104}
 105
 106static const struct proto_ops pvc_proto_ops = {
 107        .family =       PF_ATMPVC,
 108        .owner =        THIS_MODULE,
 109
 110        .release =      vcc_release,
 111        .bind =         pvc_bind,
 112        .connect =      pvc_connect,
 113        .socketpair =   sock_no_socketpair,
 114        .accept =       sock_no_accept,
 115        .getname =      pvc_getname,
 116        .poll =         vcc_poll,
 117        .ioctl =        vcc_ioctl,
 118#ifdef CONFIG_COMPAT
 119        .compat_ioctl = vcc_compat_ioctl,
 120#endif
 121        .listen =       sock_no_listen,
 122        .shutdown =     pvc_shutdown,
 123        .setsockopt =   pvc_setsockopt,
 124        .getsockopt =   pvc_getsockopt,
 125        .sendmsg =      vcc_sendmsg,
 126        .recvmsg =      vcc_recvmsg,
 127        .mmap =         sock_no_mmap,
 128        .sendpage =     sock_no_sendpage,
 129};
 130
 131
 132static int pvc_create(struct net *net, struct socket *sock, int protocol,
 133                      int kern)
 134{
 135        if (net != &init_net)
 136                return -EAFNOSUPPORT;
 137
 138        sock->ops = &pvc_proto_ops;
 139        return vcc_create(net, sock, protocol, PF_ATMPVC, kern);
 140}
 141
 142static const struct net_proto_family pvc_family_ops = {
 143        .family = PF_ATMPVC,
 144        .create = pvc_create,
 145        .owner = THIS_MODULE,
 146};
 147
 148
 149/*
 150 *      Initialize the ATM PVC protocol family
 151 */
 152
 153
 154int __init atmpvc_init(void)
 155{
 156        return sock_register(&pvc_family_ops);
 157}
 158
 159void atmpvc_exit(void)
 160{
 161        sock_unregister(PF_ATMPVC);
 162}
 163