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