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 <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, unsigned 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                       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
 141 static const struct net_proto_family pvc_family_ops = {
 142         .family = PF_ATMPVC,
 143         .create = pvc_create,
 144         .owner = THIS_MODULE,
 145 };
 146
 147
 148 /*
 149  *      Initialize the ATM PVC protocol family
 150  */
 151
 152
 153 int __init atmpvc_init(void)
 154 {
 155         return sock_register(&pvc_family_ops);
 156 }
 157
 158 void atmpvc_exit(void)
 159 {
 160         sock_unregister(PF_ATMPVC);
 161 }