[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / isdn / mISDN / socket.c

/*
 *
 * Author	Karsten Keil <kkeil@novell.com>
 *
 * Copyright 2008  by Karsten Keil <kkeil@novell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/mISDNif.h>
#include <linux/slab.h>
#include <linux/export.h>
#include "core.h"

static u_int	*debug;

static struct proto mISDN_proto = {
	.name		= "misdn",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct mISDN_sock)
};

#define _pms(sk)	((struct mISDN_sock *)sk)

static struct mISDN_sock_list	data_sockets = {
	.lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
};

static struct mISDN_sock_list	base_sockets = {
	.lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
};

#define L2_HEADER_LEN	4

static inline struct sk_buff *
_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
{
	struct sk_buff  *skb;

	skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
	if (likely(skb))
		skb_reserve(skb, L2_HEADER_LEN);
	return skb;
}

static void
mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
{
	write_lock_bh(&l->lock);
	sk_add_node(sk, &l->head);
	write_unlock_bh(&l->lock);
}

static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
{
	write_lock_bh(&l->lock);
	sk_del_node_init(sk);
	write_unlock_bh(&l->lock);
}

static int
mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
{
	struct mISDN_sock *msk;
	int	err;

	msk = container_of(ch, struct mISDN_sock, ch);
	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
	if (msk->sk.sk_state == MISDN_CLOSED)
		return -EUNATCH;
	__net_timestamp(skb);
	err = sock_queue_rcv_skb(&msk->sk, skb);
	if (err)
		printk(KERN_WARNING "%s: error %d\n", __func__, err);
	return err;
}

static int
mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
{
	struct mISDN_sock *msk;

	msk = container_of(ch, struct mISDN_sock, ch);
	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
	switch (cmd) {
	case CLOSE_CHANNEL:
		msk->sk.sk_state = MISDN_CLOSED;
		break;
	}
	return 0;
}

static inline void
mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
{
	struct timeval	tv;

	if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
		skb_get_timestamp(skb, &tv);
		put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
	}
}

static int
mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
		   struct msghdr *msg, size_t len, int flags)
{
	struct sk_buff		*skb;
	struct sock		*sk = sock->sk;

	int		copied, err;

	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
		       __func__, (int)len, flags, _pms(sk)->ch.nr,
		       sk->sk_protocol);
	if (flags & (MSG_OOB))
		return -EOPNOTSUPP;

	if (sk->sk_state == MISDN_CLOSED)
		return 0;

	skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
	if (!skb)
		return err;

	if (msg->msg_name) {
		struct sockaddr_mISDN *maddr = msg->msg_name;

		maddr->family = AF_ISDN;
		maddr->dev = _pms(sk)->dev->id;
		if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
		    (sk->sk_protocol == ISDN_P_LAPD_NT)) {
			maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
			maddr->tei =  (mISDN_HEAD_ID(skb) >> 8) & 0xff;
			maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
		} else {
			maddr->channel = _pms(sk)->ch.nr;
			maddr->sapi = _pms(sk)->ch.addr & 0xFF;
			maddr->tei =  (_pms(sk)->ch.addr >> 8) & 0xFF;
		}
		msg->msg_namelen = sizeof(*maddr);
	}

	copied = skb->len + MISDN_HEADER_LEN;
	if (len < copied) {
		if (flags & MSG_PEEK)
			atomic_dec(&skb->users);
		else
			skb_queue_head(&sk->sk_receive_queue, skb);
		return -ENOSPC;
	}
	memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
	       MISDN_HEADER_LEN);

	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);

	mISDN_sock_cmsg(sk, msg, skb);

	skb_free_datagram(sk, skb);

	return err ? : copied;
}

static int
mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
		   struct msghdr *msg, size_t len)
{
	struct sock		*sk = sock->sk;
	struct sk_buff		*skb;
	int			err = -ENOMEM;
	struct sockaddr_mISDN	*maddr;

	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
		       __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
		       sk->sk_protocol);

	if (msg->msg_flags & MSG_OOB)
		return -EOPNOTSUPP;

	if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE))
		return -EINVAL;

	if (len < MISDN_HEADER_LEN)
		return -EINVAL;

	if (sk->sk_state != MISDN_BOUND)
		return -EBADFD;

	lock_sock(sk);

	skb = _l2_alloc_skb(len, GFP_KERNEL);
	if (!skb)
		goto done;

	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
		err = -EFAULT;
		goto done;
	}

	memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
	skb_pull(skb, MISDN_HEADER_LEN);

	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
		/* if we have a address, we use it */
		maddr = (struct sockaddr_mISDN *)msg->msg_name;
		mISDN_HEAD_ID(skb) = maddr->channel;
	} else { /* use default for L2 messages */
		if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
		    (sk->sk_protocol == ISDN_P_LAPD_NT))
			mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
	}

	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s: ID:%x\n",
		       __func__, mISDN_HEAD_ID(skb));

	err = -ENODEV;
	if (!_pms(sk)->ch.peer)
		goto done;
	err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
	if (err)
		goto done;
	else {
		skb = NULL;
		err = len;
	}

done:
	if (skb)
		kfree_skb(skb);
	release_sock(sk);
	return err;
}

static int
data_sock_release(struct socket *sock)
{
	struct sock *sk = sock->sk;

	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	if (!sk)
		return 0;
	switch (sk->sk_protocol) {
	case ISDN_P_TE_S0:
	case ISDN_P_NT_S0:
	case ISDN_P_TE_E1:
	case ISDN_P_NT_E1:
		if (sk->sk_state == MISDN_BOUND)
			delete_channel(&_pms(sk)->ch);
		else
			mISDN_sock_unlink(&data_sockets, sk);
		break;
	case ISDN_P_LAPD_TE:
	case ISDN_P_LAPD_NT:
	case ISDN_P_B_RAW:
	case ISDN_P_B_HDLC:
	case ISDN_P_B_X75SLP:
	case ISDN_P_B_L2DTMF:
	case ISDN_P_B_L2DSP:
	case ISDN_P_B_L2DSPHDLC:
		delete_channel(&_pms(sk)->ch);
		mISDN_sock_unlink(&data_sockets, sk);
		break;
	}

	lock_sock(sk);

	sock_orphan(sk);
	skb_queue_purge(&sk->sk_receive_queue);

	release_sock(sk);
	sock_put(sk);

	return 0;
}

static int
data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
{
	struct mISDN_ctrl_req	cq;
	int			err = -EINVAL, val[2];
	struct mISDNchannel	*bchan, *next;

	lock_sock(sk);
	if (!_pms(sk)->dev) {
		err = -ENODEV;
		goto done;
	}
	switch (cmd) {
	case IMCTRLREQ:
		if (copy_from_user(&cq, p, sizeof(cq))) {
			err = -EFAULT;
			break;
		}
		if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
			list_for_each_entry_safe(bchan, next,
						 &_pms(sk)->dev->bchannels, list) {
				if (bchan->nr == cq.channel) {
					err = bchan->ctrl(bchan,
							  CONTROL_CHANNEL, &cq);
					break;
				}
			}
		} else
			err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
						    CONTROL_CHANNEL, &cq);
		if (err)
			break;
		if (copy_to_user(p, &cq, sizeof(cq)))
			err = -EFAULT;
		break;
	case IMCLEAR_L2:
		if (sk->sk_protocol != ISDN_P_LAPD_NT) {
			err = -EINVAL;
			break;
		}
		val[0] = cmd;
		if (get_user(val[1], (int __user *)p)) {
			err = -EFAULT;
			break;
		}
		err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
						  CONTROL_CHANNEL, val);
		break;
	case IMHOLD_L1:
		if (sk->sk_protocol != ISDN_P_LAPD_NT
		    && sk->sk_protocol != ISDN_P_LAPD_TE) {
			err = -EINVAL;
			break;
		}
		val[0] = cmd;
		if (get_user(val[1], (int __user *)p)) {
			err = -EFAULT;
			break;
		}
		err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
						  CONTROL_CHANNEL, val);
		break;
	default:
		err = -EINVAL;
		break;
	}
done:
	release_sock(sk);
	return err;
}

static int
data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	int			err = 0, id;
	struct sock		*sk = sock->sk;
	struct mISDNdevice	*dev;
	struct mISDNversion	ver;

	switch (cmd) {
	case IMGETVERSION:
		ver.major = MISDN_MAJOR_VERSION;
		ver.minor = MISDN_MINOR_VERSION;
		ver.release = MISDN_RELEASE;
		if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
			err = -EFAULT;
		break;
	case IMGETCOUNT:
		id = get_mdevice_count();
		if (put_user(id, (int __user *)arg))
			err = -EFAULT;
		break;
	case IMGETDEVINFO:
		if (get_user(id, (int __user *)arg)) {
			err = -EFAULT;
			break;
		}
		dev = get_mdevice(id);
		if (dev) {
			struct mISDN_devinfo di;

			memset(&di, 0, sizeof(di));
			di.id = dev->id;
			di.Dprotocols = dev->Dprotocols;
			di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
			di.protocol = dev->D.protocol;
			memcpy(di.channelmap, dev->channelmap,
			       sizeof(di.channelmap));
			di.nrbchan = dev->nrbchan;
			strcpy(di.name, dev_name(&dev->dev));
			if (copy_to_user((void __user *)arg, &di, sizeof(di)))
				err = -EFAULT;
		} else
			err = -ENODEV;
		break;
	default:
		if (sk->sk_state == MISDN_BOUND)
			err = data_sock_ioctl_bound(sk, cmd,
						    (void __user *)arg);
		else
			err = -ENOTCONN;
	}
	return err;
}

static int data_sock_setsockopt(struct socket *sock, int level, int optname,
				char __user *optval, unsigned int len)
{
	struct sock *sk = sock->sk;
	int err = 0, opt = 0;

	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
		       level, optname, optval, len);

	lock_sock(sk);

	switch (optname) {
	case MISDN_TIME_STAMP:
		if (get_user(opt, (int __user *)optval)) {
			err = -EFAULT;
			break;
		}

		if (opt)
			_pms(sk)->cmask |= MISDN_TIME_STAMP;
		else
			_pms(sk)->cmask &= ~MISDN_TIME_STAMP;
		break;
	default:
		err = -ENOPROTOOPT;
		break;
	}
	release_sock(sk);
	return err;
}

static int data_sock_getsockopt(struct socket *sock, int level, int optname,
				char __user *optval, int __user *optlen)
{
	struct sock *sk = sock->sk;
	int len, opt;

	if (get_user(len, optlen))
		return -EFAULT;

	if (len != sizeof(char))
		return -EINVAL;

	switch (optname) {
	case MISDN_TIME_STAMP:
		if (_pms(sk)->cmask & MISDN_TIME_STAMP)
			opt = 1;
		else
			opt = 0;

		if (put_user(opt, optval))
			return -EFAULT;
		break;
	default:
		return -ENOPROTOOPT;
	}

	return 0;
}

static int
data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
{
	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
	struct sock *sk = sock->sk;
	struct sock *csk;
	int err = 0;

	if (*debug & DEBUG_SOCKET)
		printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	if (addr_len != sizeof(struct sockaddr_mISDN))
		return -EINVAL;
	if (!maddr || maddr->family != AF_ISDN)
		return -EINVAL;

	lock_sock(sk);

	if (_pms(sk)->dev) {
		err = -EALREADY;
		goto done;
	}
	_pms(sk)->dev = get_mdevice(maddr->dev);
	if (!_pms(sk)->dev) {
		err = -ENODEV;
		goto done;
	}

	if (sk->sk_protocol < ISDN_P_B_START) {
		read_lock_bh(&data_sockets.lock);
		sk_for_each(csk, &data_sockets.head) {
			if (sk == csk)
				continue;
			if (_pms(csk)->dev != _pms(sk)->dev)
				continue;
			if (csk->sk_protocol >= ISDN_P_B_START)
				continue;
			if (IS_ISDN_P_TE(csk->sk_protocol)
			    == IS_ISDN_P_TE(sk->sk_protocol))
				continue;
			read_unlock_bh(&data_sockets.lock);
			err = -EBUSY;
			goto done;
		}
		read_unlock_bh(&data_sockets.lock);
	}

	_pms(sk)->ch.send = mISDN_send;
	_pms(sk)->ch.ctrl = mISDN_ctrl;

	switch (sk->sk_protocol) {
	case ISDN_P_TE_S0:
	case ISDN_P_NT_S0:
	case ISDN_P_TE_E1:
	case ISDN_P_NT_E1:
		mISDN_sock_unlink(&data_sockets, sk);
		err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
				     sk->sk_protocol, maddr);
		if (err)
			mISDN_sock_link(&data_sockets, sk);
		break;
	case ISDN_P_LAPD_TE:
	case ISDN_P_LAPD_NT:
		err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
				      sk->sk_protocol, maddr);
		break;
	case ISDN_P_B_RAW:
	case ISDN_P_B_HDLC:
	case ISDN_P_B_X75SLP:
	case ISDN_P_B_L2DTMF:
	case ISDN_P_B_L2DSP:
	case ISDN_P_B_L2DSPHDLC:
		err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
				     sk->sk_protocol, maddr);
		break;
	default:
		err = -EPROTONOSUPPORT;
	}
	if (err)
		goto done;
	sk->sk_state = MISDN_BOUND;
	_pms(sk)->ch.protocol = sk->sk_protocol;

done:
	release_sock(sk);
	return err;
}

static int
data_sock_getname(struct socket *sock, struct sockaddr *addr,
		  int *addr_len, int peer)
{
	struct sockaddr_mISDN	*maddr = (struct sockaddr_mISDN *) addr;
	struct sock		*sk = sock->sk;

	if (!_pms(sk)->dev)
		return -EBADFD;

	lock_sock(sk);

	*addr_len = sizeof(*maddr);
	maddr->family = AF_ISDN;
	maddr->dev = _pms(sk)->dev->id;
	maddr->channel = _pms(sk)->ch.nr;
	maddr->sapi = _pms(sk)->ch.addr & 0xff;
	maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
	release_sock(sk);
	return 0;
}

static const struct proto_ops data_sock_ops = {
	.family		= PF_ISDN,
	.owner		= THIS_MODULE,
	.release	= data_sock_release,
	.ioctl		= data_sock_ioctl,
	.bind		= data_sock_bind,
	.getname	= data_sock_getname,
	.sendmsg	= mISDN_sock_sendmsg,
	.recvmsg	= mISDN_sock_recvmsg,
	.poll		= datagram_poll,
	.listen		= sock_no_listen,
	.shutdown	= sock_no_shutdown,
	.setsockopt	= data_sock_setsockopt,
	.getsockopt	= data_sock_getsockopt,
	.connect	= sock_no_connect,
	.socketpair	= sock_no_socketpair,
	.accept		= sock_no_accept,
	.mmap		= sock_no_mmap
};

static int
data_sock_create(struct net *net, struct socket *sock, int protocol)
{
	struct sock *sk;

	if (sock->type != SOCK_DGRAM)
		return -ESOCKTNOSUPPORT;

	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
	if (!sk)
		return -ENOMEM;

	sock_init_data(sock, sk);

	sock->ops = &data_sock_ops;
	sock->state = SS_UNCONNECTED;
	sock_reset_flag(sk, SOCK_ZAPPED);

	sk->sk_protocol = protocol;
	sk->sk_state    = MISDN_OPEN;
	mISDN_sock_link(&data_sockets, sk);

	return 0;
}

static int
base_sock_release(struct socket *sock)
{
	struct sock *sk = sock->sk;

	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	if (!sk)
		return 0;

	mISDN_sock_unlink(&base_sockets, sk);
	sock_orphan(sk);
	sock_put(sk);

	return 0;
}

static int
base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	int			err = 0, id;
	struct mISDNdevice	*dev;
	struct mISDNversion	ver;

	switch (cmd) {
	case IMGETVERSION:
		ver.major = MISDN_MAJOR_VERSION;
		ver.minor = MISDN_MINOR_VERSION;
		ver.release = MISDN_RELEASE;
		if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
			err = -EFAULT;
		break;
	case IMGETCOUNT:
		id = get_mdevice_count();
		if (put_user(id, (int __user *)arg))
			err = -EFAULT;
		break;
	case IMGETDEVINFO:
		if (get_user(id, (int __user *)arg)) {
			err = -EFAULT;
			break;
		}
		dev = get_mdevice(id);
		if (dev) {
			struct mISDN_devinfo di;

			memset(&di, 0, sizeof(di));
			di.id = dev->id;
			di.Dprotocols = dev->Dprotocols;
			di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
			di.protocol = dev->D.protocol;
			memcpy(di.channelmap, dev->channelmap,
			       sizeof(di.channelmap));
			di.nrbchan = dev->nrbchan;
			strcpy(di.name, dev_name(&dev->dev));
			if (copy_to_user((void __user *)arg, &di, sizeof(di)))
				err = -EFAULT;
		} else
			err = -ENODEV;
		break;
	case IMSETDEVNAME:
	{
		struct mISDN_devrename dn;
		if (copy_from_user(&dn, (void __user *)arg,
				   sizeof(dn))) {
			err = -EFAULT;
			break;
		}
		dev = get_mdevice(dn.id);
		if (dev)
			err = device_rename(&dev->dev, dn.name);
		else
			err = -ENODEV;
	}
	break;
	default:
		err = -EINVAL;
	}
	return err;
}

static int
base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
{
	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
	struct sock *sk = sock->sk;
	int err = 0;

	if (!maddr || maddr->family != AF_ISDN)
		return -EINVAL;

	if (addr_len < sizeof(struct sockaddr_mISDN))
		return -EINVAL;

	lock_sock(sk);

	if (_pms(sk)->dev) {
		err = -EALREADY;
		goto done;
	}

	_pms(sk)->dev = get_mdevice(maddr->dev);
	if (!_pms(sk)->dev) {
		err = -ENODEV;
		goto done;
	}
	sk->sk_state = MISDN_BOUND;

done:
	release_sock(sk);
	return err;
}

static const struct proto_ops base_sock_ops = {
	.family		= PF_ISDN,
	.owner		= THIS_MODULE,
	.release	= base_sock_release,
	.ioctl		= base_sock_ioctl,
	.bind		= base_sock_bind,
	.getname	= sock_no_getname,
	.sendmsg	= sock_no_sendmsg,
	.recvmsg	= sock_no_recvmsg,
	.poll		= sock_no_poll,
	.listen		= sock_no_listen,
	.shutdown	= sock_no_shutdown,
	.setsockopt	= sock_no_setsockopt,
	.getsockopt	= sock_no_getsockopt,
	.connect	= sock_no_connect,
	.socketpair	= sock_no_socketpair,
	.accept		= sock_no_accept,
	.mmap		= sock_no_mmap
};


static int
base_sock_create(struct net *net, struct socket *sock, int protocol)
{
	struct sock *sk;

	if (sock->type != SOCK_RAW)
		return -ESOCKTNOSUPPORT;

	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
	if (!sk)
		return -ENOMEM;

	sock_init_data(sock, sk);
	sock->ops = &base_sock_ops;
	sock->state = SS_UNCONNECTED;
	sock_reset_flag(sk, SOCK_ZAPPED);
	sk->sk_protocol = protocol;
	sk->sk_state    = MISDN_OPEN;
	mISDN_sock_link(&base_sockets, sk);

	return 0;
}

static int
mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
{
	int err = -EPROTONOSUPPORT;

	switch (proto) {
	case ISDN_P_BASE:
		err = base_sock_create(net, sock, proto);
		break;
	case ISDN_P_TE_S0:
	case ISDN_P_NT_S0:
	case ISDN_P_TE_E1:
	case ISDN_P_NT_E1:
	case ISDN_P_LAPD_TE:
	case ISDN_P_LAPD_NT:
	case ISDN_P_B_RAW:
	case ISDN_P_B_HDLC:
	case ISDN_P_B_X75SLP:
	case ISDN_P_B_L2DTMF:
	case ISDN_P_B_L2DSP:
	case ISDN_P_B_L2DSPHDLC:
		err = data_sock_create(net, sock, proto);
		break;
	default:
		return err;
	}

	return err;
}

static const struct net_proto_family mISDN_sock_family_ops = {
	.owner  = THIS_MODULE,
	.family = PF_ISDN,
	.create = mISDN_sock_create,
};

int
misdn_sock_init(u_int *deb)
{
	int err;

	debug = deb;
	err = sock_register(&mISDN_sock_family_ops);
	if (err)
		printk(KERN_ERR "%s: error(%d)\n", __func__, err);
	return err;
}

void
misdn_sock_cleanup(void)
{
	sock_unregister(PF_ISDN);
}
Commit	Line	Data
1b2b03f8 KK	1	/*
	2	*
	3	* Author Karsten Keil <kkeil@novell.com>
	4	*
	5	* Copyright 2008 by Karsten Keil <kkeil@novell.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	*/
	17
	18	#include <linux/mISDNif.h>
5a0e3ad6	19	#include <linux/slab.h>
5d76fc21	20	#include <linux/export.h>
1b2b03f8 KK	21	#include "core.h"
1b2b03f8 KK	22
dfa96ec1	23	static u_int *debug;
1b2b03f8 KK	24
	25	static struct proto mISDN_proto = {
	26	.name = "misdn",
	27	.owner = THIS_MODULE,
	28	.obj_size = sizeof(struct mISDN_sock)
	29	};
	30
	31	#define _pms(sk) ((struct mISDN_sock *)sk)
	32
	33	static struct mISDN_sock_list data_sockets = {
	34	.lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
	35	};
	36
	37	static struct mISDN_sock_list base_sockets = {
	38	.lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
	39	};
	40
	41	#define L2_HEADER_LEN 4
	42
	43	static inline struct sk_buff *
	44	_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
	45	{
	46	struct sk_buff *skb;
	47
	48	skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
	49	if (likely(skb))
	50	skb_reserve(skb, L2_HEADER_LEN);
	51	return skb;
	52	}
	53
	54	static void
	55	mISDN_sock_link(struct mISDN_sock_list l, struct sock sk)
	56	{
	57	write_lock_bh(&l->lock);
	58	sk_add_node(sk, &l->head);
	59	write_unlock_bh(&l->lock);
	60	}
	61
	62	static void mISDN_sock_unlink(struct mISDN_sock_list l, struct sock sk)
	63	{
	64	write_lock_bh(&l->lock);
	65	sk_del_node_init(sk);
	66	write_unlock_bh(&l->lock);
	67	}
	68
	69	static int
	70	mISDN_send(struct mISDNchannel ch, struct sk_buff skb)
	71	{
	72	struct mISDN_sock *msk;
	73	int err;
	74
	75	msk = container_of(ch, struct mISDN_sock, ch);
	76	if (*debug & DEBUG_SOCKET)
	77	printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
	78	if (msk->sk.sk_state == MISDN_CLOSED)
	79	return -EUNATCH;
	80	__net_timestamp(skb);
	81	err = sock_queue_rcv_skb(&msk->sk, skb);
	82	if (err)
	83	printk(KERN_WARNING "%s: error %d\n", __func__, err);
	84	return err;
	85	}
	86
	87	static int
88	mISDN_ctrl(struct mISDNchannel ch, u_int cmd, void arg)
89	{
90	struct mISDN_sock *msk;
91
92	msk = container_of(ch, struct mISDN_sock, ch);
93	if (*debug & DEBUG_SOCKET)
94	printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
95	switch (cmd) {
96	case CLOSE_CHANNEL:
97	msk->sk.sk_state = MISDN_CLOSED;
98	break;
99	}
100	return 0;
101	}
102
103	static inline void
104	mISDN_sock_cmsg(struct sock sk, struct msghdr msg, struct sk_buff *skb)
105	{
106	struct timeval tv;
107
108	if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
109	skb_get_timestamp(skb, &tv);
110	put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
111	}
112	}
113
114	static int
115	mISDN_sock_recvmsg(struct kiocb iocb, struct socket sock,
475be4d8	116	struct msghdr *msg, size_t len, int flags)
1b2b03f8 KK	117	{
	118	struct sk_buff *skb;
	119	struct sock *sk = sock->sk;
1b2b03f8 KK	120
	121	int copied, err;
	122
	123	if (*debug & DEBUG_SOCKET)
	124	printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
475be4d8 JP	125	__func__, (int)len, flags, _pms(sk)->ch.nr,
475be4d8 JP	126	sk->sk_protocol);
1b2b03f8 KK	127	if (flags & (MSG_OOB))
	128	return -EOPNOTSUPP;
	129
	130	if (sk->sk_state == MISDN_CLOSED)
	131	return 0;
	132
	133	skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
	134	if (!skb)
	135	return err;
	136
2f73d7fd HFS	137	if (msg->msg_name) {
	138	struct sockaddr_mISDN *maddr = msg->msg_name;
	139
1b2b03f8 KK	140	maddr->family = AF_ISDN;
	141	maddr->dev = _pms(sk)->dev->id;
	142	if ((sk->sk_protocol == ISDN_P_LAPD_TE) \|\|
	143	(sk->sk_protocol == ISDN_P_LAPD_NT)) {
	144	maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
	145	maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff;
	146	maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
	147	} else {
	148	maddr->channel = _pms(sk)->ch.nr;
	149	maddr->sapi = _pms(sk)->ch.addr & 0xFF;
	150	maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
	151	}
2f73d7fd	152	msg->msg_namelen = sizeof(*maddr);
1b2b03f8 KK	153	}
	154
	155	copied = skb->len + MISDN_HEADER_LEN;
	156	if (len < copied) {
	157	if (flags & MSG_PEEK)
	158	atomic_dec(&skb->users);
	159	else
	160	skb_queue_head(&sk->sk_receive_queue, skb);
	161	return -ENOSPC;
	162	}
	163	memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
475be4d8	164	MISDN_HEADER_LEN);
1b2b03f8 KK	165
	166	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	167
	168	mISDN_sock_cmsg(sk, msg, skb);
	169
	170	skb_free_datagram(sk, skb);
	171
	172	return err ? : copied;
	173	}
	174
	175	static int
	176	mISDN_sock_sendmsg(struct kiocb iocb, struct socket sock,
475be4d8	177	struct msghdr *msg, size_t len)
1b2b03f8 KK	178	{
	179	struct sock *sk = sock->sk;
	180	struct sk_buff *skb;
	181	int err = -ENOMEM;
	182	struct sockaddr_mISDN *maddr;
	183
	184	if (*debug & DEBUG_SOCKET)
	185	printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
475be4d8 JP	186	__func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
475be4d8 JP	187	sk->sk_protocol);
1b2b03f8 KK	188
	189	if (msg->msg_flags & MSG_OOB)
	190	return -EOPNOTSUPP;
	191
475be4d8	192	if (msg->msg_flags & ~(MSG_DONTWAIT \| MSG_NOSIGNAL \| MSG_ERRQUEUE))
1b2b03f8 KK	193	return -EINVAL;
	194
	195	if (len < MISDN_HEADER_LEN)
	196	return -EINVAL;
	197
	198	if (sk->sk_state != MISDN_BOUND)
	199	return -EBADFD;
	200
	201	lock_sock(sk);
	202
	203	skb = _l2_alloc_skb(len, GFP_KERNEL);
	204	if (!skb)
	205	goto done;
	206
	207	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
	208	err = -EFAULT;
5df3b8bc	209	goto done;
1b2b03f8 KK	210	}
	211
	212	memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
	213	skb_pull(skb, MISDN_HEADER_LEN);
	214
	215	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
	216	/* if we have a address, we use it */
	217	maddr = (struct sockaddr_mISDN *)msg->msg_name;
	218	mISDN_HEAD_ID(skb) = maddr->channel;
	219	} else { /* use default for L2 messages */
	220	if ((sk->sk_protocol == ISDN_P_LAPD_TE) \|\|
	221	(sk->sk_protocol == ISDN_P_LAPD_NT))
eac74af9	222	mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
1b2b03f8 KK	223	}
	224
	225	if (*debug & DEBUG_SOCKET)
	226	printk(KERN_DEBUG "%s: ID:%x\n",
475be4d8	227	__func__, mISDN_HEAD_ID(skb));
1b2b03f8 KK	228
1b2b03f8 KK	229	err = -ENODEV;
5df3b8bc KK	230	if (!_pms(sk)->ch.peer)
	231	goto done;
	232	err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
	233	if (err)
	234	goto done;
	235	else {
	236	skb = NULL;
	237	err = len;
	238	}
1b2b03f8 KK	239
1b2b03f8 KK	240	done:
5df3b8bc KK	241	if (skb)
5df3b8bc KK	242	kfree_skb(skb);
1b2b03f8 KK	243	release_sock(sk);
1b2b03f8 KK	244	return err;
1b2b03f8 KK	245	}
	246
	247	static int
	248	data_sock_release(struct socket *sock)
	249	{
	250	struct sock *sk = sock->sk;
	251
	252	if (*debug & DEBUG_SOCKET)
	253	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	254	if (!sk)
	255	return 0;
	256	switch (sk->sk_protocol) {
	257	case ISDN_P_TE_S0:
	258	case ISDN_P_NT_S0:
	259	case ISDN_P_TE_E1:
	260	case ISDN_P_NT_E1:
	261	if (sk->sk_state == MISDN_BOUND)
	262	delete_channel(&_pms(sk)->ch);
	263	else
	264	mISDN_sock_unlink(&data_sockets, sk);
	265	break;
	266	case ISDN_P_LAPD_TE:
	267	case ISDN_P_LAPD_NT:
	268	case ISDN_P_B_RAW:
	269	case ISDN_P_B_HDLC:
	270	case ISDN_P_B_X75SLP:
	271	case ISDN_P_B_L2DTMF:
	272	case ISDN_P_B_L2DSP:
	273	case ISDN_P_B_L2DSPHDLC:
	274	delete_channel(&_pms(sk)->ch);
	275	mISDN_sock_unlink(&data_sockets, sk);
	276	break;
	277	}
	278
	279	lock_sock(sk);
	280
	281	sock_orphan(sk);
	282	skb_queue_purge(&sk->sk_receive_queue);
	283
	284	release_sock(sk);
	285	sock_put(sk);
	286
	287	return 0;
	288	}
	289
	290	static int
	291	data_sock_ioctl_bound(struct sock sk, unsigned int cmd, void __user p)
	292	{
	293	struct mISDN_ctrl_req cq;
e73f6b22	294	int err = -EINVAL, val[2];
1b2b03f8 KK	295	struct mISDNchannel bchan, next;
	296
	297	lock_sock(sk);
	298	if (!_pms(sk)->dev) {
	299	err = -ENODEV;
	300	goto done;
	301	}
	302	switch (cmd) {
	303	case IMCTRLREQ:
	304	if (copy_from_user(&cq, p, sizeof(cq))) {
	305	err = -EFAULT;
	306	break;
	307	}
	308	if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
	309	list_for_each_entry_safe(bchan, next,
475be4d8	310	&_pms(sk)->dev->bchannels, list) {
1b2b03f8 KK	311	if (bchan->nr == cq.channel) {
1b2b03f8 KK	312	err = bchan->ctrl(bchan,
475be4d8	313	CONTROL_CHANNEL, &cq);
1b2b03f8 KK	314	break;
	315	}
	316	}
	317	} else
	318	err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
475be4d8	319	CONTROL_CHANNEL, &cq);
1b2b03f8 KK	320	if (err)
	321	break;
	322	if (copy_to_user(p, &cq, sizeof(cq)))
	323	err = -EFAULT;
	324	break;
	325	case IMCLEAR_L2:
	326	if (sk->sk_protocol != ISDN_P_LAPD_NT) {
	327	err = -EINVAL;
	328	break;
	329	}
e73f6b22 AE	330	val[0] = cmd;
e73f6b22 AE	331	if (get_user(val[1], (int __user *)p)) {
1b2b03f8 KK	332	err = -EFAULT;
	333	break;
	334	}
	335	err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
475be4d8	336	CONTROL_CHANNEL, val);
e73f6b22 AE	337	break;
	338	case IMHOLD_L1:
	339	if (sk->sk_protocol != ISDN_P_LAPD_NT
475be4d8	340	&& sk->sk_protocol != ISDN_P_LAPD_TE) {
e73f6b22 AE	341	err = -EINVAL;
	342	break;
	343	}
	344	val[0] = cmd;
	345	if (get_user(val[1], (int __user *)p)) {
	346	err = -EFAULT;
	347	break;
	348	}
	349	err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
475be4d8	350	CONTROL_CHANNEL, val);
1b2b03f8 KK	351	break;
	352	default:
	353	err = -EINVAL;
	354	break;
	355	}
	356	done:
	357	release_sock(sk);
	358	return err;
	359	}
	360
	361	static int
	362	data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	363	{
475be4d8	364	int err = 0, id;
1b2b03f8 KK	365	struct sock *sk = sock->sk;
	366	struct mISDNdevice *dev;
	367	struct mISDNversion ver;
	368
	369	switch (cmd) {
	370	case IMGETVERSION:
	371	ver.major = MISDN_MAJOR_VERSION;
	372	ver.minor = MISDN_MINOR_VERSION;
	373	ver.release = MISDN_RELEASE;
	374	if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
	375	err = -EFAULT;
	376	break;
	377	case IMGETCOUNT:
	378	id = get_mdevice_count();
	379	if (put_user(id, (int __user *)arg))
	380	err = -EFAULT;
	381	break;
	382	case IMGETDEVINFO:
	383	if (get_user(id, (int __user *)arg)) {
	384	err = -EFAULT;
	385	break;
	386	}
	387	dev = get_mdevice(id);
	388	if (dev) {
	389	struct mISDN_devinfo di;
	390
ce384d91	391	memset(&di, 0, sizeof(di));
1b2b03f8 KK	392	di.id = dev->id;
	393	di.Dprotocols = dev->Dprotocols;
	394	di.Bprotocols = dev->Bprotocols \| get_all_Bprotocols();
	395	di.protocol = dev->D.protocol;
	396	memcpy(di.channelmap, dev->channelmap,
475be4d8	397	sizeof(di.channelmap));
1b2b03f8	398	di.nrbchan = dev->nrbchan;
837468d1	399	strcpy(di.name, dev_name(&dev->dev));
1b2b03f8 KK	400	if (copy_to_user((void __user *)arg, &di, sizeof(di)))
	401	err = -EFAULT;
	402	} else
	403	err = -ENODEV;
	404	break;
	405	default:
	406	if (sk->sk_state == MISDN_BOUND)
	407	err = data_sock_ioctl_bound(sk, cmd,
475be4d8	408	(void __user *)arg);
1b2b03f8 KK	409	else
	410	err = -ENOTCONN;
	411	}
	412	return err;
	413	}
	414
	415	static int data_sock_setsockopt(struct socket *sock, int level, int optname,
475be4d8	416	char __user *optval, unsigned int len)
1b2b03f8 KK	417	{
	418	struct sock *sk = sock->sk;
	419	int err = 0, opt = 0;
	420
	421	if (*debug & DEBUG_SOCKET)
	422	printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
475be4d8	423	level, optname, optval, len);
1b2b03f8 KK	424
	425	lock_sock(sk);
	426
	427	switch (optname) {
	428	case MISDN_TIME_STAMP:
	429	if (get_user(opt, (int __user *)optval)) {
	430	err = -EFAULT;
	431	break;
	432	}
	433
	434	if (opt)
	435	_pms(sk)->cmask \|= MISDN_TIME_STAMP;
	436	else
	437	_pms(sk)->cmask &= ~MISDN_TIME_STAMP;
	438	break;
	439	default:
	440	err = -ENOPROTOOPT;
	441	break;
	442	}
	443	release_sock(sk);
	444	return err;
	445	}
	446
	447	static int data_sock_getsockopt(struct socket *sock, int level, int optname,
475be4d8	448	char __user optval, int __user optlen)
1b2b03f8 KK	449	{
	450	struct sock *sk = sock->sk;
	451	int len, opt;
	452
	453	if (get_user(len, optlen))
	454	return -EFAULT;
	455
81b424d9 DM	456	if (len != sizeof(char))
	457	return -EINVAL;
	458
1b2b03f8 KK	459	switch (optname) {
	460	case MISDN_TIME_STAMP:
	461	if (_pms(sk)->cmask & MISDN_TIME_STAMP)
	462	opt = 1;
	463	else
	464	opt = 0;
	465
	466	if (put_user(opt, optval))
	467	return -EFAULT;
	468	break;
	469	default:
	470	return -ENOPROTOOPT;
	471	}
	472
	473	return 0;
	474	}
	475
	476	static int
	477	data_sock_bind(struct socket sock, struct sockaddr addr, int addr_len)
	478	{
	479	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	480	struct sock *sk = sock->sk;
1b4d3312	481	struct sock *csk;
1b2b03f8 KK	482	int err = 0;
	483
	484	if (*debug & DEBUG_SOCKET)
	485	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	486	if (addr_len != sizeof(struct sockaddr_mISDN))
	487	return -EINVAL;
	488	if (!maddr \|\| maddr->family != AF_ISDN)
	489	return -EINVAL;
	490
	491	lock_sock(sk);
	492
	493	if (_pms(sk)->dev) {
	494	err = -EALREADY;
	495	goto done;
	496	}
	497	_pms(sk)->dev = get_mdevice(maddr->dev);
	498	if (!_pms(sk)->dev) {
	499	err = -ENODEV;
	500	goto done;
	501	}
1b4d3312	502
9a812553 AE	503	if (sk->sk_protocol < ISDN_P_B_START) {
9a812553 AE	504	read_lock_bh(&data_sockets.lock);
b67bfe0d	505	sk_for_each(csk, &data_sockets.head) {
9a812553 AE	506	if (sk == csk)
	507	continue;
	508	if (_pms(csk)->dev != _pms(sk)->dev)
	509	continue;
	510	if (csk->sk_protocol >= ISDN_P_B_START)
	511	continue;
	512	if (IS_ISDN_P_TE(csk->sk_protocol)
475be4d8	513	== IS_ISDN_P_TE(sk->sk_protocol))
9a812553 AE	514	continue;
	515	read_unlock_bh(&data_sockets.lock);
	516	err = -EBUSY;
	517	goto done;
	518	}
1b4d3312	519	read_unlock_bh(&data_sockets.lock);
1b4d3312	520	}
1b4d3312	521
1b2b03f8 KK	522	_pms(sk)->ch.send = mISDN_send;
	523	_pms(sk)->ch.ctrl = mISDN_ctrl;
	524
	525	switch (sk->sk_protocol) {
	526	case ISDN_P_TE_S0:
	527	case ISDN_P_NT_S0:
	528	case ISDN_P_TE_E1:
	529	case ISDN_P_NT_E1:
	530	mISDN_sock_unlink(&data_sockets, sk);
	531	err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
475be4d8	532	sk->sk_protocol, maddr);
1b2b03f8 KK	533	if (err)
	534	mISDN_sock_link(&data_sockets, sk);
	535	break;
	536	case ISDN_P_LAPD_TE:
	537	case ISDN_P_LAPD_NT:
	538	err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
475be4d8	539	sk->sk_protocol, maddr);
1b2b03f8 KK	540	break;
	541	case ISDN_P_B_RAW:
	542	case ISDN_P_B_HDLC:
	543	case ISDN_P_B_X75SLP:
	544	case ISDN_P_B_L2DTMF:
	545	case ISDN_P_B_L2DSP:
	546	case ISDN_P_B_L2DSPHDLC:
	547	err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
475be4d8	548	sk->sk_protocol, maddr);
1b2b03f8 KK	549	break;
	550	default:
	551	err = -EPROTONOSUPPORT;
	552	}
	553	if (err)
	554	goto done;
	555	sk->sk_state = MISDN_BOUND;
	556	_pms(sk)->ch.protocol = sk->sk_protocol;
	557
	558	done:
	559	release_sock(sk);
	560	return err;
	561	}
	562
	563	static int
	564	data_sock_getname(struct socket sock, struct sockaddr addr,
475be4d8	565	int *addr_len, int peer)
1b2b03f8	566	{
475be4d8	567	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
1b2b03f8 KK	568	struct sock *sk = sock->sk;
	569
	570	if (!_pms(sk)->dev)
	571	return -EBADFD;
	572
	573	lock_sock(sk);
	574
	575	addr_len = sizeof(maddr);
d9152097	576	maddr->family = AF_ISDN;
1b2b03f8 KK	577	maddr->dev = _pms(sk)->dev->id;
	578	maddr->channel = _pms(sk)->ch.nr;
	579	maddr->sapi = _pms(sk)->ch.addr & 0xff;
	580	maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
	581	release_sock(sk);
	582	return 0;
	583	}
	584
	585	static const struct proto_ops data_sock_ops = {
	586	.family = PF_ISDN,
	587	.owner = THIS_MODULE,
	588	.release = data_sock_release,
	589	.ioctl = data_sock_ioctl,
	590	.bind = data_sock_bind,
	591	.getname = data_sock_getname,
	592	.sendmsg = mISDN_sock_sendmsg,
	593	.recvmsg = mISDN_sock_recvmsg,
	594	.poll = datagram_poll,
	595	.listen = sock_no_listen,
	596	.shutdown = sock_no_shutdown,
	597	.setsockopt = data_sock_setsockopt,
	598	.getsockopt = data_sock_getsockopt,
	599	.connect = sock_no_connect,
	600	.socketpair = sock_no_socketpair,
	601	.accept = sock_no_accept,
	602	.mmap = sock_no_mmap
	603	};
	604
	605	static int
	606	data_sock_create(struct net net, struct socket sock, int protocol)
	607	{
	608	struct sock *sk;
	609
	610	if (sock->type != SOCK_DGRAM)
	611	return -ESOCKTNOSUPPORT;
	612
	613	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
	614	if (!sk)
	615	return -ENOMEM;
	616
	617	sock_init_data(sock, sk);
	618
	619	sock->ops = &data_sock_ops;
	620	sock->state = SS_UNCONNECTED;
	621	sock_reset_flag(sk, SOCK_ZAPPED);
	622
	623	sk->sk_protocol = protocol;
	624	sk->sk_state = MISDN_OPEN;
	625	mISDN_sock_link(&data_sockets, sk);
	626
	627	return 0;
	628	}
	629
	630	static int
	631	base_sock_release(struct socket *sock)
	632	{
	633	struct sock *sk = sock->sk;
	634
	635	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	636	if (!sk)
	637	return 0;
	638
	639	mISDN_sock_unlink(&base_sockets, sk);
	640	sock_orphan(sk);
641	sock_put(sk);
642
643	return 0;
644	}
645
646	static int
647	base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
648	{
475be4d8	649	int err = 0, id;
1b2b03f8 KK	650	struct mISDNdevice *dev;
	651	struct mISDNversion ver;
	652
	653	switch (cmd) {
	654	case IMGETVERSION:
	655	ver.major = MISDN_MAJOR_VERSION;
	656	ver.minor = MISDN_MINOR_VERSION;
	657	ver.release = MISDN_RELEASE;
	658	if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
	659	err = -EFAULT;
	660	break;
	661	case IMGETCOUNT:
	662	id = get_mdevice_count();
	663	if (put_user(id, (int __user *)arg))
	664	err = -EFAULT;
	665	break;
	666	case IMGETDEVINFO:
	667	if (get_user(id, (int __user *)arg)) {
	668	err = -EFAULT;
	669	break;
	670	}
	671	dev = get_mdevice(id);
	672	if (dev) {
	673	struct mISDN_devinfo di;
	674
ce384d91	675	memset(&di, 0, sizeof(di));
1b2b03f8 KK	676	di.id = dev->id;
	677	di.Dprotocols = dev->Dprotocols;
	678	di.Bprotocols = dev->Bprotocols \| get_all_Bprotocols();
	679	di.protocol = dev->D.protocol;
	680	memcpy(di.channelmap, dev->channelmap,
475be4d8	681	sizeof(di.channelmap));
1b2b03f8	682	di.nrbchan = dev->nrbchan;
837468d1	683	strcpy(di.name, dev_name(&dev->dev));
1b2b03f8 KK	684	if (copy_to_user((void __user *)arg, &di, sizeof(di)))
	685	err = -EFAULT;
	686	} else
	687	err = -ENODEV;
	688	break;
8b6015f7	689	case IMSETDEVNAME:
475be4d8 JP	690	{
	691	struct mISDN_devrename dn;
	692	if (copy_from_user(&dn, (void __user *)arg,
	693	sizeof(dn))) {
	694	err = -EFAULT;
	695	break;
8b6015f7	696	}
475be4d8 JP	697	dev = get_mdevice(dn.id);
	698	if (dev)
	699	err = device_rename(&dev->dev, dn.name);
	700	else
	701	err = -ENODEV;
	702	}
	703	break;
1b2b03f8 KK	704	default:
	705	err = -EINVAL;
	706	}
	707	return err;
	708	}
	709
	710	static int
	711	base_sock_bind(struct socket sock, struct sockaddr addr, int addr_len)
	712	{
	713	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	714	struct sock *sk = sock->sk;
	715	int err = 0;
	716
	717	if (!maddr \|\| maddr->family != AF_ISDN)
	718	return -EINVAL;
	719
eec89a77 ED	720	if (addr_len < sizeof(struct sockaddr_mISDN))
	721	return -EINVAL;
	722
1b2b03f8 KK	723	lock_sock(sk);
	724
	725	if (_pms(sk)->dev) {
	726	err = -EALREADY;
	727	goto done;
	728	}
	729
	730	_pms(sk)->dev = get_mdevice(maddr->dev);
	731	if (!_pms(sk)->dev) {
	732	err = -ENODEV;
	733	goto done;
	734	}
	735	sk->sk_state = MISDN_BOUND;
	736
	737	done:
	738	release_sock(sk);
	739	return err;
	740	}
	741
	742	static const struct proto_ops base_sock_ops = {
	743	.family = PF_ISDN,
	744	.owner = THIS_MODULE,
	745	.release = base_sock_release,
	746	.ioctl = base_sock_ioctl,
	747	.bind = base_sock_bind,
	748	.getname = sock_no_getname,
	749	.sendmsg = sock_no_sendmsg,
	750	.recvmsg = sock_no_recvmsg,
	751	.poll = sock_no_poll,
	752	.listen = sock_no_listen,
	753	.shutdown = sock_no_shutdown,
	754	.setsockopt = sock_no_setsockopt,
	755	.getsockopt = sock_no_getsockopt,
	756	.connect = sock_no_connect,
	757	.socketpair = sock_no_socketpair,
	758	.accept = sock_no_accept,
	759	.mmap = sock_no_mmap
	760	};
	761
	762
	763	static int
	764	base_sock_create(struct net net, struct socket sock, int protocol)
	765	{
	766	struct sock *sk;
	767
	768	if (sock->type != SOCK_RAW)
	769	return -ESOCKTNOSUPPORT;
	770
	771	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
	772	if (!sk)
	773	return -ENOMEM;
	774
	775	sock_init_data(sock, sk);
	776	sock->ops = &base_sock_ops;
	777	sock->state = SS_UNCONNECTED;
	778	sock_reset_flag(sk, SOCK_ZAPPED);
	779	sk->sk_protocol = protocol;
	780	sk->sk_state = MISDN_OPEN;
	781	mISDN_sock_link(&base_sockets, sk);
	782
	783	return 0;
	784	}
	785
	786	static int
3f378b68	787	mISDN_sock_create(struct net net, struct socket sock, int proto, int kern)
1b2b03f8 KK	788	{
	789	int err = -EPROTONOSUPPORT;
	790
475be4d8	791	switch (proto) {
1b2b03f8 KK	792	case ISDN_P_BASE:
	793	err = base_sock_create(net, sock, proto);
	794	break;
	795	case ISDN_P_TE_S0:
	796	case ISDN_P_NT_S0:
	797	case ISDN_P_TE_E1:
	798	case ISDN_P_NT_E1:
	799	case ISDN_P_LAPD_TE:
	800	case ISDN_P_LAPD_NT:
	801	case ISDN_P_B_RAW:
	802	case ISDN_P_B_HDLC:
	803	case ISDN_P_B_X75SLP:
	804	case ISDN_P_B_L2DTMF:
	805	case ISDN_P_B_L2DSP:
	806	case ISDN_P_B_L2DSPHDLC:
	807	err = data_sock_create(net, sock, proto);
	808	break;
	809	default:
	810	return err;
	811	}
	812
	813	return err;
	814	}
	815
ec1b4cf7	816	static const struct net_proto_family mISDN_sock_family_ops = {
1b2b03f8 KK	817	.owner = THIS_MODULE,
	818	.family = PF_ISDN,
	819	.create = mISDN_sock_create,
	820	};
	821
	822	int
	823	misdn_sock_init(u_int *deb)
	824	{
	825	int err;
	826
	827	debug = deb;
	828	err = sock_register(&mISDN_sock_family_ops);
	829	if (err)
	830	printk(KERN_ERR "%s: error(%d)\n", __func__, err);
	831	return err;
	832	}
	833
	834	void
	835	misdn_sock_cleanup(void)
	836	{
	837	sock_unregister(PF_ISDN);
	838	}