[net-next-2.6.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 "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;
	struct sockaddr_mISDN	*maddr;

	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_namelen >= sizeof(struct sockaddr_mISDN)) {
		msg->msg_namelen = sizeof(struct sockaddr_mISDN);
		maddr = (struct sockaddr_mISDN *)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;
		}
	} else {
		if (msg->msg_namelen)
			printk(KERN_WARNING "%s: too small namelen %d\n",
			    __func__, msg->msg_namelen);
		msg->msg_namelen = 0;
	}

	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;

			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;

	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 hlist_node *node;
	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, node, &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->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;

			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;

	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>
1b2b03f8 KK	20	#include "core.h"
1b2b03f8 KK	21
dfa96ec1	22	static u_int *debug;
1b2b03f8 KK	23
	24	static struct proto mISDN_proto = {
	25	.name = "misdn",
	26	.owner = THIS_MODULE,
	27	.obj_size = sizeof(struct mISDN_sock)
	28	};
	29
	30	#define _pms(sk) ((struct mISDN_sock *)sk)
	31
	32	static struct mISDN_sock_list data_sockets = {
	33	.lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
	34	};
	35
	36	static struct mISDN_sock_list base_sockets = {
	37	.lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
	38	};
	39
	40	#define L2_HEADER_LEN 4
	41
	42	static inline struct sk_buff *
	43	_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
	44	{
	45	struct sk_buff *skb;
	46
	47	skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
	48	if (likely(skb))
	49	skb_reserve(skb, L2_HEADER_LEN);
	50	return skb;
	51	}
	52
	53	static void
	54	mISDN_sock_link(struct mISDN_sock_list l, struct sock sk)
	55	{
	56	write_lock_bh(&l->lock);
	57	sk_add_node(sk, &l->head);
	58	write_unlock_bh(&l->lock);
	59	}
	60
	61	static void mISDN_sock_unlink(struct mISDN_sock_list l, struct sock sk)
	62	{
	63	write_lock_bh(&l->lock);
	64	sk_del_node_init(sk);
	65	write_unlock_bh(&l->lock);
	66	}
	67
	68	static int
	69	mISDN_send(struct mISDNchannel ch, struct sk_buff skb)
	70	{
	71	struct mISDN_sock *msk;
	72	int err;
	73
	74	msk = container_of(ch, struct mISDN_sock, ch);
	75	if (*debug & DEBUG_SOCKET)
	76	printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
	77	if (msk->sk.sk_state == MISDN_CLOSED)
	78	return -EUNATCH;
	79	__net_timestamp(skb);
	80	err = sock_queue_rcv_skb(&msk->sk, skb);
	81	if (err)
	82	printk(KERN_WARNING "%s: error %d\n", __func__, err);
	83	return err;
	84	}
	85
	86	static int
87	mISDN_ctrl(struct mISDNchannel ch, u_int cmd, void arg)
88	{
89	struct mISDN_sock *msk;
90
91	msk = container_of(ch, struct mISDN_sock, ch);
92	if (*debug & DEBUG_SOCKET)
93	printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
94	switch (cmd) {
95	case CLOSE_CHANNEL:
96	msk->sk.sk_state = MISDN_CLOSED;
97	break;
98	}
99	return 0;
100	}
101
102	static inline void
103	mISDN_sock_cmsg(struct sock sk, struct msghdr msg, struct sk_buff *skb)
104	{
105	struct timeval tv;
106
107	if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
108	skb_get_timestamp(skb, &tv);
109	put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
110	}
111	}
112
113	static int
114	mISDN_sock_recvmsg(struct kiocb iocb, struct socket sock,
115	struct msghdr *msg, size_t len, int flags)
116	{
117	struct sk_buff *skb;
118	struct sock *sk = sock->sk;
119	struct sockaddr_mISDN *maddr;
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",
125	__func__, (int)len, flags, _pms(sk)->ch.nr,
126	sk->sk_protocol);
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
137	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
138	msg->msg_namelen = sizeof(struct sockaddr_mISDN);
139	maddr = (struct sockaddr_mISDN *)msg->msg_name;
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	}
152	} else {
153	if (msg->msg_namelen)
154	printk(KERN_WARNING "%s: too small namelen %d\n",
155	__func__, msg->msg_namelen);
156	msg->msg_namelen = 0;
157	}
158
159	copied = skb->len + MISDN_HEADER_LEN;
160	if (len < copied) {
161	if (flags & MSG_PEEK)
162	atomic_dec(&skb->users);
163	else
164	skb_queue_head(&sk->sk_receive_queue, skb);
165	return -ENOSPC;
166	}
167	memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
168	MISDN_HEADER_LEN);
169
170	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
171
172	mISDN_sock_cmsg(sk, msg, skb);
173
174	skb_free_datagram(sk, skb);
175
176	return err ? : copied;
177	}
178
179	static int
180	mISDN_sock_sendmsg(struct kiocb iocb, struct socket sock,
181	struct msghdr *msg, size_t len)
182	{
183	struct sock *sk = sock->sk;
184	struct sk_buff *skb;
185	int err = -ENOMEM;
186	struct sockaddr_mISDN *maddr;
187
188	if (*debug & DEBUG_SOCKET)
189	printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
190	__func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
191	sk->sk_protocol);
192
193	if (msg->msg_flags & MSG_OOB)
194	return -EOPNOTSUPP;
195
196	if (msg->msg_flags & ~(MSG_DONTWAIT\|MSG_NOSIGNAL\|MSG_ERRQUEUE))
197	return -EINVAL;
198
199	if (len < MISDN_HEADER_LEN)
200	return -EINVAL;
201
202	if (sk->sk_state != MISDN_BOUND)
203	return -EBADFD;
204
205	lock_sock(sk);
206
207	skb = _l2_alloc_skb(len, GFP_KERNEL);
208	if (!skb)
209	goto done;
210
211	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
212	err = -EFAULT;
5df3b8bc	213	goto done;
1b2b03f8 KK	214	}
	215
	216	memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
	217	skb_pull(skb, MISDN_HEADER_LEN);
	218
	219	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
	220	/* if we have a address, we use it */
	221	maddr = (struct sockaddr_mISDN *)msg->msg_name;
	222	mISDN_HEAD_ID(skb) = maddr->channel;
	223	} else { /* use default for L2 messages */
	224	if ((sk->sk_protocol == ISDN_P_LAPD_TE) \|\|
	225	(sk->sk_protocol == ISDN_P_LAPD_NT))
eac74af9	226	mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
1b2b03f8 KK	227	}
	228
	229	if (*debug & DEBUG_SOCKET)
	230	printk(KERN_DEBUG "%s: ID:%x\n",
	231	__func__, mISDN_HEAD_ID(skb));
	232
	233	err = -ENODEV;
5df3b8bc KK	234	if (!_pms(sk)->ch.peer)
	235	goto done;
	236	err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
	237	if (err)
	238	goto done;
	239	else {
	240	skb = NULL;
	241	err = len;
	242	}
1b2b03f8 KK	243
1b2b03f8 KK	244	done:
5df3b8bc KK	245	if (skb)
5df3b8bc KK	246	kfree_skb(skb);
1b2b03f8 KK	247	release_sock(sk);
1b2b03f8 KK	248	return err;
1b2b03f8 KK	249	}
	250
	251	static int
	252	data_sock_release(struct socket *sock)
	253	{
	254	struct sock *sk = sock->sk;
	255
	256	if (*debug & DEBUG_SOCKET)
	257	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	258	if (!sk)
	259	return 0;
	260	switch (sk->sk_protocol) {
	261	case ISDN_P_TE_S0:
	262	case ISDN_P_NT_S0:
	263	case ISDN_P_TE_E1:
	264	case ISDN_P_NT_E1:
	265	if (sk->sk_state == MISDN_BOUND)
	266	delete_channel(&_pms(sk)->ch);
	267	else
	268	mISDN_sock_unlink(&data_sockets, sk);
	269	break;
	270	case ISDN_P_LAPD_TE:
	271	case ISDN_P_LAPD_NT:
	272	case ISDN_P_B_RAW:
	273	case ISDN_P_B_HDLC:
	274	case ISDN_P_B_X75SLP:
	275	case ISDN_P_B_L2DTMF:
	276	case ISDN_P_B_L2DSP:
	277	case ISDN_P_B_L2DSPHDLC:
	278	delete_channel(&_pms(sk)->ch);
	279	mISDN_sock_unlink(&data_sockets, sk);
	280	break;
	281	}
	282
	283	lock_sock(sk);
	284
	285	sock_orphan(sk);
	286	skb_queue_purge(&sk->sk_receive_queue);
	287
	288	release_sock(sk);
	289	sock_put(sk);
	290
	291	return 0;
	292	}
	293
	294	static int
	295	data_sock_ioctl_bound(struct sock sk, unsigned int cmd, void __user p)
	296	{
	297	struct mISDN_ctrl_req cq;
e73f6b22	298	int err = -EINVAL, val[2];
1b2b03f8 KK	299	struct mISDNchannel bchan, next;
	300
	301	lock_sock(sk);
	302	if (!_pms(sk)->dev) {
	303	err = -ENODEV;
	304	goto done;
	305	}
	306	switch (cmd) {
	307	case IMCTRLREQ:
	308	if (copy_from_user(&cq, p, sizeof(cq))) {
	309	err = -EFAULT;
	310	break;
	311	}
	312	if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
	313	list_for_each_entry_safe(bchan, next,
	314	&_pms(sk)->dev->bchannels, list) {
	315	if (bchan->nr == cq.channel) {
	316	err = bchan->ctrl(bchan,
	317	CONTROL_CHANNEL, &cq);
	318	break;
	319	}
	320	}
	321	} else
	322	err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
	323	CONTROL_CHANNEL, &cq);
	324	if (err)
	325	break;
	326	if (copy_to_user(p, &cq, sizeof(cq)))
	327	err = -EFAULT;
	328	break;
	329	case IMCLEAR_L2:
	330	if (sk->sk_protocol != ISDN_P_LAPD_NT) {
	331	err = -EINVAL;
	332	break;
	333	}
e73f6b22 AE	334	val[0] = cmd;
e73f6b22 AE	335	if (get_user(val[1], (int __user *)p)) {
1b2b03f8 KK	336	err = -EFAULT;
	337	break;
	338	}
	339	err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
e73f6b22 AE	340	CONTROL_CHANNEL, val);
	341	break;
	342	case IMHOLD_L1:
	343	if (sk->sk_protocol != ISDN_P_LAPD_NT
	344	&& sk->sk_protocol != ISDN_P_LAPD_TE) {
	345	err = -EINVAL;
	346	break;
	347	}
	348	val[0] = cmd;
	349	if (get_user(val[1], (int __user *)p)) {
	350	err = -EFAULT;
	351	break;
	352	}
	353	err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
	354	CONTROL_CHANNEL, val);
1b2b03f8 KK	355	break;
	356	default:
	357	err = -EINVAL;
	358	break;
	359	}
	360	done:
	361	release_sock(sk);
	362	return err;
	363	}
	364
	365	static int
	366	data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	367	{
	368	int err = 0, id;
	369	struct sock *sk = sock->sk;
	370	struct mISDNdevice *dev;
	371	struct mISDNversion ver;
	372
	373	switch (cmd) {
	374	case IMGETVERSION:
	375	ver.major = MISDN_MAJOR_VERSION;
	376	ver.minor = MISDN_MINOR_VERSION;
	377	ver.release = MISDN_RELEASE;
	378	if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
	379	err = -EFAULT;
	380	break;
	381	case IMGETCOUNT:
	382	id = get_mdevice_count();
	383	if (put_user(id, (int __user *)arg))
	384	err = -EFAULT;
	385	break;
	386	case IMGETDEVINFO:
	387	if (get_user(id, (int __user *)arg)) {
	388	err = -EFAULT;
	389	break;
	390	}
	391	dev = get_mdevice(id);
	392	if (dev) {
	393	struct mISDN_devinfo di;
	394
	395	di.id = dev->id;
	396	di.Dprotocols = dev->Dprotocols;
	397	di.Bprotocols = dev->Bprotocols \| get_all_Bprotocols();
	398	di.protocol = dev->D.protocol;
	399	memcpy(di.channelmap, dev->channelmap,
ff4cc1de	400	sizeof(di.channelmap));
1b2b03f8	401	di.nrbchan = dev->nrbchan;
837468d1	402	strcpy(di.name, dev_name(&dev->dev));
1b2b03f8 KK	403	if (copy_to_user((void __user *)arg, &di, sizeof(di)))
	404	err = -EFAULT;
	405	} else
	406	err = -ENODEV;
	407	break;
	408	default:
	409	if (sk->sk_state == MISDN_BOUND)
	410	err = data_sock_ioctl_bound(sk, cmd,
	411	(void __user *)arg);
	412	else
	413	err = -ENOTCONN;
	414	}
	415	return err;
	416	}
	417
	418	static int data_sock_setsockopt(struct socket *sock, int level, int optname,
b7058842	419	char __user *optval, unsigned int len)
1b2b03f8 KK	420	{
	421	struct sock *sk = sock->sk;
	422	int err = 0, opt = 0;
	423
	424	if (*debug & DEBUG_SOCKET)
	425	printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
	426	level, optname, optval, len);
	427
	428	lock_sock(sk);
	429
	430	switch (optname) {
	431	case MISDN_TIME_STAMP:
	432	if (get_user(opt, (int __user *)optval)) {
	433	err = -EFAULT;
	434	break;
	435	}
	436
	437	if (opt)
	438	_pms(sk)->cmask \|= MISDN_TIME_STAMP;
	439	else
	440	_pms(sk)->cmask &= ~MISDN_TIME_STAMP;
	441	break;
	442	default:
	443	err = -ENOPROTOOPT;
	444	break;
	445	}
	446	release_sock(sk);
	447	return err;
	448	}
	449
	450	static int data_sock_getsockopt(struct socket *sock, int level, int optname,
	451	char __user optval, int __user optlen)
	452	{
	453	struct sock *sk = sock->sk;
	454	int len, opt;
	455
	456	if (get_user(len, optlen))
	457	return -EFAULT;
	458
	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 AE	481	struct hlist_node *node;
1b4d3312 AE	482	struct sock *csk;
1b2b03f8 KK	483	int err = 0;
	484
	485	if (*debug & DEBUG_SOCKET)
	486	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	487	if (addr_len != sizeof(struct sockaddr_mISDN))
	488	return -EINVAL;
	489	if (!maddr \|\| maddr->family != AF_ISDN)
	490	return -EINVAL;
	491
	492	lock_sock(sk);
	493
	494	if (_pms(sk)->dev) {
	495	err = -EALREADY;
	496	goto done;
	497	}
	498	_pms(sk)->dev = get_mdevice(maddr->dev);
	499	if (!_pms(sk)->dev) {
	500	err = -ENODEV;
	501	goto done;
	502	}
1b4d3312	503
9a812553 AE	504	if (sk->sk_protocol < ISDN_P_B_START) {
	505	read_lock_bh(&data_sockets.lock);
	506	sk_for_each(csk, node, &data_sockets.head) {
	507	if (sk == csk)
	508	continue;
	509	if (_pms(csk)->dev != _pms(sk)->dev)
	510	continue;
	511	if (csk->sk_protocol >= ISDN_P_B_START)
	512	continue;
	513	if (IS_ISDN_P_TE(csk->sk_protocol)
	514	== IS_ISDN_P_TE(sk->sk_protocol))
	515	continue;
	516	read_unlock_bh(&data_sockets.lock);
	517	err = -EBUSY;
	518	goto done;
	519	}
1b4d3312	520	read_unlock_bh(&data_sockets.lock);
1b4d3312	521	}
1b4d3312	522
1b2b03f8 KK	523	_pms(sk)->ch.send = mISDN_send;
	524	_pms(sk)->ch.ctrl = mISDN_ctrl;
	525
	526	switch (sk->sk_protocol) {
	527	case ISDN_P_TE_S0:
	528	case ISDN_P_NT_S0:
	529	case ISDN_P_TE_E1:
	530	case ISDN_P_NT_E1:
	531	mISDN_sock_unlink(&data_sockets, sk);
	532	err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
	533	sk->sk_protocol, maddr);
	534	if (err)
	535	mISDN_sock_link(&data_sockets, sk);
	536	break;
	537	case ISDN_P_LAPD_TE:
	538	case ISDN_P_LAPD_NT:
	539	err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
	540	sk->sk_protocol, maddr);
	541	break;
	542	case ISDN_P_B_RAW:
	543	case ISDN_P_B_HDLC:
	544	case ISDN_P_B_X75SLP:
	545	case ISDN_P_B_L2DTMF:
	546	case ISDN_P_B_L2DSP:
	547	case ISDN_P_B_L2DSPHDLC:
	548	err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
	549	sk->sk_protocol, maddr);
	550	break;
	551	default:
	552	err = -EPROTONOSUPPORT;
	553	}
	554	if (err)
	555	goto done;
	556	sk->sk_state = MISDN_BOUND;
	557	_pms(sk)->ch.protocol = sk->sk_protocol;
	558
	559	done:
	560	release_sock(sk);
	561	return err;
	562	}
	563
	564	static int
	565	data_sock_getname(struct socket sock, struct sockaddr addr,
	566	int *addr_len, int peer)
	567	{
	568	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	569	struct sock *sk = sock->sk;
	570
	571	if (!_pms(sk)->dev)
	572	return -EBADFD;
	573
	574	lock_sock(sk);
	575
	576	addr_len = sizeof(maddr);
	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	{
649	int err = 0, id;
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
675	di.id = dev->id;
676	di.Dprotocols = dev->Dprotocols;
677	di.Bprotocols = dev->Bprotocols \| get_all_Bprotocols();
678	di.protocol = dev->D.protocol;
679	memcpy(di.channelmap, dev->channelmap,
ff4cc1de	680	sizeof(di.channelmap));
1b2b03f8	681	di.nrbchan = dev->nrbchan;
837468d1	682	strcpy(di.name, dev_name(&dev->dev));
1b2b03f8 KK	683	if (copy_to_user((void __user *)arg, &di, sizeof(di)))
	684	err = -EFAULT;
	685	} else
	686	err = -ENODEV;
	687	break;
8b6015f7 MU	688	case IMSETDEVNAME:
	689	{
	690	struct mISDN_devrename dn;
	691	if (copy_from_user(&dn, (void __user *)arg,
	692	sizeof(dn))) {
	693	err = -EFAULT;
	694	break;
	695	}
	696	dev = get_mdevice(dn.id);
	697	if (dev)
837468d1	698	err = device_rename(&dev->dev, dn.name);
8b6015f7 MU	699	else
	700	err = -ENODEV;
	701	}
	702	break;
1b2b03f8 KK	703	default:
	704	err = -EINVAL;
	705	}
	706	return err;
	707	}
	708
	709	static int
	710	base_sock_bind(struct socket sock, struct sockaddr addr, int addr_len)
	711	{
	712	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	713	struct sock *sk = sock->sk;
	714	int err = 0;
	715
	716	if (!maddr \|\| maddr->family != AF_ISDN)
	717	return -EINVAL;
	718
	719	lock_sock(sk);
	720
	721	if (_pms(sk)->dev) {
	722	err = -EALREADY;
	723	goto done;
	724	}
	725
	726	_pms(sk)->dev = get_mdevice(maddr->dev);
	727	if (!_pms(sk)->dev) {
	728	err = -ENODEV;
	729	goto done;
	730	}
	731	sk->sk_state = MISDN_BOUND;
	732
	733	done:
	734	release_sock(sk);
	735	return err;
	736	}
	737
	738	static const struct proto_ops base_sock_ops = {
	739	.family = PF_ISDN,
	740	.owner = THIS_MODULE,
	741	.release = base_sock_release,
	742	.ioctl = base_sock_ioctl,
	743	.bind = base_sock_bind,
	744	.getname = sock_no_getname,
	745	.sendmsg = sock_no_sendmsg,
	746	.recvmsg = sock_no_recvmsg,
	747	.poll = sock_no_poll,
	748	.listen = sock_no_listen,
	749	.shutdown = sock_no_shutdown,
	750	.setsockopt = sock_no_setsockopt,
	751	.getsockopt = sock_no_getsockopt,
	752	.connect = sock_no_connect,
	753	.socketpair = sock_no_socketpair,
	754	.accept = sock_no_accept,
	755	.mmap = sock_no_mmap
	756	};
	757
	758
	759	static int
	760	base_sock_create(struct net net, struct socket sock, int protocol)
	761	{
	762	struct sock *sk;
	763
	764	if (sock->type != SOCK_RAW)
	765	return -ESOCKTNOSUPPORT;
	766
767	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
768	if (!sk)
769	return -ENOMEM;
770
771	sock_init_data(sock, sk);
772	sock->ops = &base_sock_ops;
773	sock->state = SS_UNCONNECTED;
774	sock_reset_flag(sk, SOCK_ZAPPED);
775	sk->sk_protocol = protocol;
776	sk->sk_state = MISDN_OPEN;
777	mISDN_sock_link(&base_sockets, sk);
778
779	return 0;
780	}
781
782	static int
3f378b68	783	mISDN_sock_create(struct net net, struct socket sock, int proto, int kern)
1b2b03f8 KK	784	{
	785	int err = -EPROTONOSUPPORT;
	786
	787	switch (proto) {
	788	case ISDN_P_BASE:
	789	err = base_sock_create(net, sock, proto);
	790	break;
	791	case ISDN_P_TE_S0:
	792	case ISDN_P_NT_S0:
	793	case ISDN_P_TE_E1:
	794	case ISDN_P_NT_E1:
	795	case ISDN_P_LAPD_TE:
	796	case ISDN_P_LAPD_NT:
	797	case ISDN_P_B_RAW:
	798	case ISDN_P_B_HDLC:
	799	case ISDN_P_B_X75SLP:
	800	case ISDN_P_B_L2DTMF:
	801	case ISDN_P_B_L2DSP:
	802	case ISDN_P_B_L2DSPHDLC:
	803	err = data_sock_create(net, sock, proto);
	804	break;
	805	default:
	806	return err;
	807	}
	808
	809	return err;
	810	}
	811
ec1b4cf7	812	static const struct net_proto_family mISDN_sock_family_ops = {
1b2b03f8 KK	813	.owner = THIS_MODULE,
	814	.family = PF_ISDN,
	815	.create = mISDN_sock_create,
	816	};
	817
	818	int
	819	misdn_sock_init(u_int *deb)
	820	{
	821	int err;
	822
	823	debug = deb;
	824	err = sock_register(&mISDN_sock_family_ops);
	825	if (err)
	826	printk(KERN_ERR "%s: error(%d)\n", __func__, err);
	827	return err;
	828	}
	829
	830	void
	831	misdn_sock_cleanup(void)
	832	{
	833	sock_unregister(PF_ISDN);
	834	}
	835