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/config.h>
   7 #include <linux/net.h>          /* struct socket, struct proto_ops */
   8 #include <linux/atm.h>          /* ATM stuff */
   9 #include <linux/atmdev.h>       /* ATM devices */
  10 #include <linux/errno.h>        /* error codes */
  11 #include <linux/kernel.h>       /* printk */
  12 #include <linux/init.h>
  13 #include <linux/skbuff.h>
  14 #include <linux/bitops.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
  21 static int pvc_shutdown(struct socket *sock,int how)
  22 {
  23         return 0;
  24 }
  25
  26
  27 static int pvc_bind(struct socket *sock,struct sockaddr *sockaddr,
  28     int sockaddr_len)
  29 {
  30         struct sock *sk = sock->sk;
  31         struct sockaddr_atmpvc *addr;
  32         struct atm_vcc *vcc;
  33         int error;
  34
  35         if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) return -EINVAL;
  36         addr = (struct sockaddr_atmpvc *) sockaddr;
  37         if (addr->sap_family != AF_ATMPVC) 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) addr->sap_addr.vpi = vcc->vpi;
  46                 if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci;
  47         }
  48         error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
  49                             addr->sap_addr.vci);
  50 out:
  51         release_sock(sk);
  52         return error;
  53 }
  54
  55
  56 static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr,
  57     int sockaddr_len,int flags)
  58 {
  59         return pvc_bind(sock,sockaddr,sockaddr_len);
  60 }
  61
  62 static int pvc_setsockopt(struct socket *sock, int level, int optname,
  63                           char __user *optval, int optlen)
  64 {
  65         struct sock *sk = sock->sk;
  66         int error;
  67
  68         lock_sock(sk);
  69         error = vcc_setsockopt(sock, level, optname, optval, optlen);
  70         release_sock(sk);
  71         return error;
  72 }
  73
  74
  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
  87
  88 static 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)) 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
 105 static const struct proto_ops pvc_proto_ops = {
 106         .family =       PF_ATMPVC,
 107         .owner =        THIS_MODULE,
 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 =         vcc_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
 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         .family = PF_ATMPVC,
 137         .create = pvc_create,
 138         .owner = THIS_MODULE,
 139 };
 140
 141
 142 /*
 143  *      Initialize the ATM PVC protocol family
 144  */
 145
 146
 147 int __init atmpvc_init(void)
 148 {
 149         return sock_register(&pvc_family_ops);
 150 }
 151
 152 void atmpvc_exit(void)
 153 {
 154         sock_unregister(PF_ATMPVC);
 155 }