163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* net/atm/pvc.c - ATM PVC sockets */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#include <linux/net.h> /* struct socket, struct proto_ops */
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#include <linux/atm.h> /* ATM stuff */
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#include <linux/atmdev.h> /* ATM devices */
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#include <linux/errno.h> /* error codes */
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#include <linux/kernel.h> /* printk */
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/bitops.h>
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#include <linux/export.h>
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#include <net/sock.h> /* for sock_no_* */
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#include "resources.h" /* devs and vccs */
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#include "common.h" /* common for PVCs and SVCs */
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static int pvc_shutdown(struct socket *sock, int how)
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{
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return 0;
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}
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static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
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int sockaddr_len)
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{
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struct sock *sk = sock->sk;
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struct sockaddr_atmpvc *addr;
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struct atm_vcc *vcc;
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int error;
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if (sockaddr_len != sizeof(struct sockaddr_atmpvc))
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return -EINVAL;
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addr = (struct sockaddr_atmpvc *)sockaddr;
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if (addr->sap_family != AF_ATMPVC)
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return -EAFNOSUPPORT;
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lock_sock(sk);
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vcc = ATM_SD(sock);
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if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
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error = -EBADFD;
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goto out;
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}
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if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
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if (vcc->vpi != ATM_VPI_UNSPEC)
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addr->sap_addr.vpi = vcc->vpi;
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if (vcc->vci != ATM_VCI_UNSPEC)
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addr->sap_addr.vci = vcc->vci;
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}
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error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
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addr->sap_addr.vci);
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out:
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release_sock(sk);
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return error;
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}
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static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
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int sockaddr_len, int flags)
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{
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return pvc_bind(sock, sockaddr, sockaddr_len);
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}
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static int pvc_setsockopt(struct socket *sock, int level, int optname,
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sockptr_t optval, unsigned int optlen)
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{
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struct sock *sk = sock->sk;
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int error;
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lock_sock(sk);
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error = vcc_setsockopt(sock, level, optname, optval, optlen);
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release_sock(sk);
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return error;
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}
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static int pvc_getsockopt(struct socket *sock, int level, int optname,
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char __user *optval, int __user *optlen)
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{
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struct sock *sk = sock->sk;
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int error;
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lock_sock(sk);
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error = vcc_getsockopt(sock, level, optname, optval, optlen);
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release_sock(sk);
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return error;
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}
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static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
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int peer)
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{
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struct sockaddr_atmpvc *addr;
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struct atm_vcc *vcc = ATM_SD(sock);
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if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
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return -ENOTCONN;
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addr = (struct sockaddr_atmpvc *)sockaddr;
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memset(addr, 0, sizeof(*addr));
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addr->sap_family = AF_ATMPVC;
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addr->sap_addr.itf = vcc->dev->number;
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addr->sap_addr.vpi = vcc->vpi;
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addr->sap_addr.vci = vcc->vci;
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return sizeof(struct sockaddr_atmpvc);
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}
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static const struct proto_ops pvc_proto_ops = {
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.family = PF_ATMPVC,
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.owner = THIS_MODULE,
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.release = vcc_release,
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.bind = pvc_bind,
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.connect = pvc_connect,
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.socketpair = sock_no_socketpair,
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.accept = sock_no_accept,
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.getname = pvc_getname,
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.poll = vcc_poll,
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.ioctl = vcc_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = vcc_compat_ioctl,
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#endif
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.gettstamp = sock_gettstamp,
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.listen = sock_no_listen,
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.shutdown = pvc_shutdown,
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.setsockopt = pvc_setsockopt,
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.getsockopt = pvc_getsockopt,
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.sendmsg = vcc_sendmsg,
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.recvmsg = vcc_recvmsg,
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.mmap = sock_no_mmap,
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};
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static int pvc_create(struct net *net, struct socket *sock, int protocol,
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int kern)
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{
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if (net != &init_net)
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return -EAFNOSUPPORT;
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sock->ops = &pvc_proto_ops;
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return vcc_create(net, sock, protocol, PF_ATMPVC, kern);
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}
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static const struct net_proto_family pvc_family_ops = {
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.family = PF_ATMPVC,
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.create = pvc_create,
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.owner = THIS_MODULE,
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};
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/*
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* Initialize the ATM PVC protocol family
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*/
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int __init atmpvc_init(void)
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{
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return sock_register(&pvc_family_ops);
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}
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void atmpvc_exit(void)
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{
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sock_unregister(PF_ATMPVC);
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}
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