[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 "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 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 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>
	19	#include "core.h"
	20
dfa96ec1	21	static u_int *debug;
1b2b03f8 KK	22
	23	static struct proto mISDN_proto = {
	24	.name = "misdn",
	25	.owner = THIS_MODULE,
	26	.obj_size = sizeof(struct mISDN_sock)
	27	};
	28
	29	#define _pms(sk) ((struct mISDN_sock *)sk)
	30
	31	static struct mISDN_sock_list data_sockets = {
	32	.lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
	33	};
	34
	35	static struct mISDN_sock_list base_sockets = {
	36	.lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
	37	};
	38
	39	#define L2_HEADER_LEN 4
	40
	41	static inline struct sk_buff *
	42	_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
	43	{
	44	struct sk_buff *skb;
	45
	46	skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
	47	if (likely(skb))
	48	skb_reserve(skb, L2_HEADER_LEN);
	49	return skb;
	50	}
	51
	52	static void
	53	mISDN_sock_link(struct mISDN_sock_list l, struct sock sk)
	54	{
	55	write_lock_bh(&l->lock);
	56	sk_add_node(sk, &l->head);
	57	write_unlock_bh(&l->lock);
	58	}
	59
	60	static void mISDN_sock_unlink(struct mISDN_sock_list l, struct sock sk)
	61	{
	62	write_lock_bh(&l->lock);
	63	sk_del_node_init(sk);
	64	write_unlock_bh(&l->lock);
	65	}
	66
	67	static int
	68	mISDN_send(struct mISDNchannel ch, struct sk_buff skb)
	69	{
	70	struct mISDN_sock *msk;
	71	int err;
	72
	73	msk = container_of(ch, struct mISDN_sock, ch);
	74	if (*debug & DEBUG_SOCKET)
	75	printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
	76	if (msk->sk.sk_state == MISDN_CLOSED)
	77	return -EUNATCH;
	78	__net_timestamp(skb);
	79	err = sock_queue_rcv_skb(&msk->sk, skb);
	80	if (err)
	81	printk(KERN_WARNING "%s: error %d\n", __func__, err);
	82	return err;
	83	}
	84
	85	static int
86	mISDN_ctrl(struct mISDNchannel ch, u_int cmd, void arg)
87	{
88	struct mISDN_sock *msk;
89
90	msk = container_of(ch, struct mISDN_sock, ch);
91	if (*debug & DEBUG_SOCKET)
92	printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
93	switch (cmd) {
94	case CLOSE_CHANNEL:
95	msk->sk.sk_state = MISDN_CLOSED;
96	break;
97	}
98	return 0;
99	}
100
101	static inline void
102	mISDN_sock_cmsg(struct sock sk, struct msghdr msg, struct sk_buff *skb)
103	{
104	struct timeval tv;
105
106	if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
107	skb_get_timestamp(skb, &tv);
108	put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
109	}
110	}
111
112	static int
113	mISDN_sock_recvmsg(struct kiocb iocb, struct socket sock,
114	struct msghdr *msg, size_t len, int flags)
115	{
116	struct sk_buff *skb;
117	struct sock *sk = sock->sk;
118	struct sockaddr_mISDN *maddr;
119
120	int copied, err;
121
122	if (*debug & DEBUG_SOCKET)
123	printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
124	__func__, (int)len, flags, _pms(sk)->ch.nr,
125	sk->sk_protocol);
126	if (flags & (MSG_OOB))
127	return -EOPNOTSUPP;
128
129	if (sk->sk_state == MISDN_CLOSED)
130	return 0;
131
132	skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
133	if (!skb)
134	return err;
135
136	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
137	msg->msg_namelen = sizeof(struct sockaddr_mISDN);
138	maddr = (struct sockaddr_mISDN *)msg->msg_name;
139	maddr->family = AF_ISDN;
140	maddr->dev = _pms(sk)->dev->id;
141	if ((sk->sk_protocol == ISDN_P_LAPD_TE) \|\|
142	(sk->sk_protocol == ISDN_P_LAPD_NT)) {
143	maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
144	maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff;
145	maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
146	} else {
147	maddr->channel = _pms(sk)->ch.nr;
148	maddr->sapi = _pms(sk)->ch.addr & 0xFF;
149	maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
150	}
151	} else {
152	if (msg->msg_namelen)
153	printk(KERN_WARNING "%s: too small namelen %d\n",
154	__func__, msg->msg_namelen);
155	msg->msg_namelen = 0;
156	}
157
158	copied = skb->len + MISDN_HEADER_LEN;
159	if (len < copied) {
160	if (flags & MSG_PEEK)
161	atomic_dec(&skb->users);
162	else
163	skb_queue_head(&sk->sk_receive_queue, skb);
164	return -ENOSPC;
165	}
166	memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
167	MISDN_HEADER_LEN);
168
169	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
170
171	mISDN_sock_cmsg(sk, msg, skb);
172
173	skb_free_datagram(sk, skb);
174
175	return err ? : copied;
176	}
177
178	static int
179	mISDN_sock_sendmsg(struct kiocb iocb, struct socket sock,
180	struct msghdr *msg, size_t len)
181	{
182	struct sock *sk = sock->sk;
183	struct sk_buff *skb;
184	int err = -ENOMEM;
185	struct sockaddr_mISDN *maddr;
186
187	if (*debug & DEBUG_SOCKET)
188	printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
189	__func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
190	sk->sk_protocol);
191
192	if (msg->msg_flags & MSG_OOB)
193	return -EOPNOTSUPP;
194
195	if (msg->msg_flags & ~(MSG_DONTWAIT\|MSG_NOSIGNAL\|MSG_ERRQUEUE))
196	return -EINVAL;
197
198	if (len < MISDN_HEADER_LEN)
199	return -EINVAL;
200
201	if (sk->sk_state != MISDN_BOUND)
202	return -EBADFD;
203
204	lock_sock(sk);
205
206	skb = _l2_alloc_skb(len, GFP_KERNEL);
207	if (!skb)
208	goto done;
209
210	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
211	err = -EFAULT;
5df3b8bc	212	goto done;
1b2b03f8 KK	213	}
	214
	215	memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
	216	skb_pull(skb, MISDN_HEADER_LEN);
	217
	218	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
	219	/* if we have a address, we use it */
	220	maddr = (struct sockaddr_mISDN *)msg->msg_name;
	221	mISDN_HEAD_ID(skb) = maddr->channel;
	222	} else { /* use default for L2 messages */
	223	if ((sk->sk_protocol == ISDN_P_LAPD_TE) \|\|
	224	(sk->sk_protocol == ISDN_P_LAPD_NT))
eac74af9	225	mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
1b2b03f8 KK	226	}
	227
	228	if (*debug & DEBUG_SOCKET)
	229	printk(KERN_DEBUG "%s: ID:%x\n",
	230	__func__, mISDN_HEAD_ID(skb));
	231
	232	err = -ENODEV;
5df3b8bc KK	233	if (!_pms(sk)->ch.peer)
	234	goto done;
	235	err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
	236	if (err)
	237	goto done;
	238	else {
	239	skb = NULL;
	240	err = len;
	241	}
1b2b03f8 KK	242
1b2b03f8 KK	243	done:
5df3b8bc KK	244	if (skb)
5df3b8bc KK	245	kfree_skb(skb);
1b2b03f8 KK	246	release_sock(sk);
1b2b03f8 KK	247	return err;
1b2b03f8 KK	248	}
	249
	250	static int
	251	data_sock_release(struct socket *sock)
	252	{
	253	struct sock *sk = sock->sk;
	254
	255	if (*debug & DEBUG_SOCKET)
	256	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
	257	if (!sk)
	258	return 0;
	259	switch (sk->sk_protocol) {
	260	case ISDN_P_TE_S0:
	261	case ISDN_P_NT_S0:
	262	case ISDN_P_TE_E1:
	263	case ISDN_P_NT_E1:
	264	if (sk->sk_state == MISDN_BOUND)
	265	delete_channel(&_pms(sk)->ch);
	266	else
	267	mISDN_sock_unlink(&data_sockets, sk);
	268	break;
	269	case ISDN_P_LAPD_TE:
	270	case ISDN_P_LAPD_NT:
	271	case ISDN_P_B_RAW:
	272	case ISDN_P_B_HDLC:
	273	case ISDN_P_B_X75SLP:
	274	case ISDN_P_B_L2DTMF:
	275	case ISDN_P_B_L2DSP:
	276	case ISDN_P_B_L2DSPHDLC:
	277	delete_channel(&_pms(sk)->ch);
	278	mISDN_sock_unlink(&data_sockets, sk);
	279	break;
	280	}
	281
	282	lock_sock(sk);
	283
	284	sock_orphan(sk);
	285	skb_queue_purge(&sk->sk_receive_queue);
	286
	287	release_sock(sk);
	288	sock_put(sk);
	289
	290	return 0;
	291	}
	292
	293	static int
	294	data_sock_ioctl_bound(struct sock sk, unsigned int cmd, void __user p)
	295	{
	296	struct mISDN_ctrl_req cq;
e73f6b22	297	int err = -EINVAL, val[2];
1b2b03f8 KK	298	struct mISDNchannel bchan, next;
	299
	300	lock_sock(sk);
	301	if (!_pms(sk)->dev) {
	302	err = -ENODEV;
	303	goto done;
	304	}
	305	switch (cmd) {
	306	case IMCTRLREQ:
	307	if (copy_from_user(&cq, p, sizeof(cq))) {
	308	err = -EFAULT;
	309	break;
	310	}
	311	if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
	312	list_for_each_entry_safe(bchan, next,
	313	&_pms(sk)->dev->bchannels, list) {
	314	if (bchan->nr == cq.channel) {
	315	err = bchan->ctrl(bchan,
	316	CONTROL_CHANNEL, &cq);
	317	break;
	318	}
	319	}
	320	} else
	321	err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
	322	CONTROL_CHANNEL, &cq);
	323	if (err)
	324	break;
	325	if (copy_to_user(p, &cq, sizeof(cq)))
	326	err = -EFAULT;
	327	break;
	328	case IMCLEAR_L2:
	329	if (sk->sk_protocol != ISDN_P_LAPD_NT) {
	330	err = -EINVAL;
	331	break;
	332	}
e73f6b22 AE	333	val[0] = cmd;
e73f6b22 AE	334	if (get_user(val[1], (int __user *)p)) {
1b2b03f8 KK	335	err = -EFAULT;
	336	break;
	337	}
	338	err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
e73f6b22 AE	339	CONTROL_CHANNEL, val);
	340	break;
	341	case IMHOLD_L1:
	342	if (sk->sk_protocol != ISDN_P_LAPD_NT
	343	&& sk->sk_protocol != ISDN_P_LAPD_TE) {
	344	err = -EINVAL;
	345	break;
	346	}
	347	val[0] = cmd;
	348	if (get_user(val[1], (int __user *)p)) {
	349	err = -EFAULT;
	350	break;
	351	}
	352	err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
	353	CONTROL_CHANNEL, val);
1b2b03f8 KK	354	break;
	355	default:
	356	err = -EINVAL;
	357	break;
	358	}
	359	done:
	360	release_sock(sk);
	361	return err;
	362	}
	363
	364	static int
	365	data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	366	{
	367	int err = 0, id;
	368	struct sock *sk = sock->sk;
	369	struct mISDNdevice *dev;
	370	struct mISDNversion ver;
	371
	372	switch (cmd) {
	373	case IMGETVERSION:
	374	ver.major = MISDN_MAJOR_VERSION;
	375	ver.minor = MISDN_MINOR_VERSION;
	376	ver.release = MISDN_RELEASE;
	377	if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
	378	err = -EFAULT;
	379	break;
	380	case IMGETCOUNT:
	381	id = get_mdevice_count();
	382	if (put_user(id, (int __user *)arg))
	383	err = -EFAULT;
	384	break;
	385	case IMGETDEVINFO:
	386	if (get_user(id, (int __user *)arg)) {
	387	err = -EFAULT;
	388	break;
	389	}
	390	dev = get_mdevice(id);
	391	if (dev) {
	392	struct mISDN_devinfo di;
	393
	394	di.id = dev->id;
	395	di.Dprotocols = dev->Dprotocols;
	396	di.Bprotocols = dev->Bprotocols \| get_all_Bprotocols();
	397	di.protocol = dev->D.protocol;
	398	memcpy(di.channelmap, dev->channelmap,
ff4cc1de	399	sizeof(di.channelmap));
1b2b03f8	400	di.nrbchan = dev->nrbchan;
837468d1	401	strcpy(di.name, dev_name(&dev->dev));
1b2b03f8 KK	402	if (copy_to_user((void __user *)arg, &di, sizeof(di)))
	403	err = -EFAULT;
	404	} else
	405	err = -ENODEV;
	406	break;
	407	default:
	408	if (sk->sk_state == MISDN_BOUND)
	409	err = data_sock_ioctl_bound(sk, cmd,
	410	(void __user *)arg);
	411	else
	412	err = -ENOTCONN;
	413	}
	414	return err;
	415	}
	416
	417	static int data_sock_setsockopt(struct socket *sock, int level, int optname,
b7058842	418	char __user *optval, unsigned int len)
1b2b03f8 KK	419	{
	420	struct sock *sk = sock->sk;
	421	int err = 0, opt = 0;
	422
	423	if (*debug & DEBUG_SOCKET)
	424	printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
	425	level, optname, optval, len);
	426
	427	lock_sock(sk);
	428
	429	switch (optname) {
	430	case MISDN_TIME_STAMP:
	431	if (get_user(opt, (int __user *)optval)) {
	432	err = -EFAULT;
	433	break;
	434	}
	435
	436	if (opt)
	437	_pms(sk)->cmask \|= MISDN_TIME_STAMP;
	438	else
	439	_pms(sk)->cmask &= ~MISDN_TIME_STAMP;
	440	break;
	441	default:
	442	err = -ENOPROTOOPT;
	443	break;
	444	}
	445	release_sock(sk);
	446	return err;
	447	}
	448
	449	static int data_sock_getsockopt(struct socket *sock, int level, int optname,
	450	char __user optval, int __user optlen)
	451	{
	452	struct sock *sk = sock->sk;
	453	int len, opt;
	454
	455	if (get_user(len, optlen))
	456	return -EFAULT;
	457
	458	switch (optname) {
	459	case MISDN_TIME_STAMP:
	460	if (_pms(sk)->cmask & MISDN_TIME_STAMP)
	461	opt = 1;
	462	else
	463	opt = 0;
	464
	465	if (put_user(opt, optval))
	466	return -EFAULT;
	467	break;
	468	default:
	469	return -ENOPROTOOPT;
	470	}
	471
	472	return 0;
	473	}
	474
	475	static int
	476	data_sock_bind(struct socket sock, struct sockaddr addr, int addr_len)
	477	{
	478	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	479	struct sock *sk = sock->sk;
1b4d3312 AE	480	struct hlist_node *node;
1b4d3312 AE	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) {
	504	read_lock_bh(&data_sockets.lock);
	505	sk_for_each(csk, node, &data_sockets.head) {
	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)
	513	== IS_ISDN_P_TE(sk->sk_protocol))
	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,
	532	sk->sk_protocol, maddr);
	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,
	539	sk->sk_protocol, maddr);
	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,
	548	sk->sk_protocol, maddr);
	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,
	565	int *addr_len, int peer)
	566	{
	567	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	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);
	576	maddr->dev = _pms(sk)->dev->id;
	577	maddr->channel = _pms(sk)->ch.nr;
	578	maddr->sapi = _pms(sk)->ch.addr & 0xff;
	579	maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
	580	release_sock(sk);
	581	return 0;
	582	}
	583
	584	static const struct proto_ops data_sock_ops = {
	585	.family = PF_ISDN,
586	.owner = THIS_MODULE,
587	.release = data_sock_release,
588	.ioctl = data_sock_ioctl,
589	.bind = data_sock_bind,
590	.getname = data_sock_getname,
591	.sendmsg = mISDN_sock_sendmsg,
592	.recvmsg = mISDN_sock_recvmsg,
593	.poll = datagram_poll,
594	.listen = sock_no_listen,
595	.shutdown = sock_no_shutdown,
596	.setsockopt = data_sock_setsockopt,
597	.getsockopt = data_sock_getsockopt,
598	.connect = sock_no_connect,
599	.socketpair = sock_no_socketpair,
600	.accept = sock_no_accept,
601	.mmap = sock_no_mmap
602	};
603
604	static int
605	data_sock_create(struct net net, struct socket sock, int protocol)
606	{
607	struct sock *sk;
608
609	if (sock->type != SOCK_DGRAM)
610	return -ESOCKTNOSUPPORT;
611
612	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
613	if (!sk)
614	return -ENOMEM;
615
616	sock_init_data(sock, sk);
617
618	sock->ops = &data_sock_ops;
619	sock->state = SS_UNCONNECTED;
620	sock_reset_flag(sk, SOCK_ZAPPED);
621
622	sk->sk_protocol = protocol;
623	sk->sk_state = MISDN_OPEN;
624	mISDN_sock_link(&data_sockets, sk);
625
626	return 0;
627	}
628
629	static int
630	base_sock_release(struct socket *sock)
631	{
632	struct sock *sk = sock->sk;
633
634	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
635	if (!sk)
636	return 0;
637
638	mISDN_sock_unlink(&base_sockets, sk);
639	sock_orphan(sk);
640	sock_put(sk);
641
642	return 0;
643	}
644
645	static int
646	base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
647	{
648	int err = 0, id;
649	struct mISDNdevice *dev;
650	struct mISDNversion ver;
651
652	switch (cmd) {
653	case IMGETVERSION:
654	ver.major = MISDN_MAJOR_VERSION;
655	ver.minor = MISDN_MINOR_VERSION;
656	ver.release = MISDN_RELEASE;
657	if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
658	err = -EFAULT;
659	break;
660	case IMGETCOUNT:
661	id = get_mdevice_count();
662	if (put_user(id, (int __user *)arg))
663	err = -EFAULT;
664	break;
665	case IMGETDEVINFO:
666	if (get_user(id, (int __user *)arg)) {
667	err = -EFAULT;
668	break;
669	}
670	dev = get_mdevice(id);
671	if (dev) {
672	struct mISDN_devinfo di;
673
674	di.id = dev->id;
675	di.Dprotocols = dev->Dprotocols;
676	di.Bprotocols = dev->Bprotocols \| get_all_Bprotocols();
677	di.protocol = dev->D.protocol;
678	memcpy(di.channelmap, dev->channelmap,
ff4cc1de	679	sizeof(di.channelmap));
1b2b03f8	680	di.nrbchan = dev->nrbchan;
837468d1	681	strcpy(di.name, dev_name(&dev->dev));
1b2b03f8 KK	682	if (copy_to_user((void __user *)arg, &di, sizeof(di)))
	683	err = -EFAULT;
	684	} else
	685	err = -ENODEV;
	686	break;
8b6015f7 MU	687	case IMSETDEVNAME:
	688	{
	689	struct mISDN_devrename dn;
	690	if (copy_from_user(&dn, (void __user *)arg,
	691	sizeof(dn))) {
	692	err = -EFAULT;
	693	break;
	694	}
	695	dev = get_mdevice(dn.id);
	696	if (dev)
837468d1	697	err = device_rename(&dev->dev, dn.name);
8b6015f7 MU	698	else
	699	err = -ENODEV;
	700	}
	701	break;
1b2b03f8 KK	702	default:
	703	err = -EINVAL;
	704	}
	705	return err;
	706	}
	707
	708	static int
	709	base_sock_bind(struct socket sock, struct sockaddr addr, int addr_len)
	710	{
	711	struct sockaddr_mISDN maddr = (struct sockaddr_mISDN ) addr;
	712	struct sock *sk = sock->sk;
	713	int err = 0;
	714
	715	if (!maddr \|\| maddr->family != AF_ISDN)
	716	return -EINVAL;
	717
	718	lock_sock(sk);
	719
	720	if (_pms(sk)->dev) {
	721	err = -EALREADY;
	722	goto done;
	723	}
	724
	725	_pms(sk)->dev = get_mdevice(maddr->dev);
	726	if (!_pms(sk)->dev) {
	727	err = -ENODEV;
	728	goto done;
	729	}
	730	sk->sk_state = MISDN_BOUND;
	731
	732	done:
	733	release_sock(sk);
	734	return err;
	735	}
	736
	737	static const struct proto_ops base_sock_ops = {
	738	.family = PF_ISDN,
	739	.owner = THIS_MODULE,
	740	.release = base_sock_release,
	741	.ioctl = base_sock_ioctl,
	742	.bind = base_sock_bind,
	743	.getname = sock_no_getname,
	744	.sendmsg = sock_no_sendmsg,
	745	.recvmsg = sock_no_recvmsg,
	746	.poll = sock_no_poll,
	747	.listen = sock_no_listen,
	748	.shutdown = sock_no_shutdown,
	749	.setsockopt = sock_no_setsockopt,
	750	.getsockopt = sock_no_getsockopt,
	751	.connect = sock_no_connect,
	752	.socketpair = sock_no_socketpair,
	753	.accept = sock_no_accept,
	754	.mmap = sock_no_mmap
	755	};
	756
	757
	758	static int
	759	base_sock_create(struct net net, struct socket sock, int protocol)
	760	{
	761	struct sock *sk;
	762
	763	if (sock->type != SOCK_RAW)
	764	return -ESOCKTNOSUPPORT;
	765
766	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
767	if (!sk)
768	return -ENOMEM;
769
770	sock_init_data(sock, sk);
771	sock->ops = &base_sock_ops;
772	sock->state = SS_UNCONNECTED;
773	sock_reset_flag(sk, SOCK_ZAPPED);
774	sk->sk_protocol = protocol;
775	sk->sk_state = MISDN_OPEN;
776	mISDN_sock_link(&base_sockets, sk);
777
778	return 0;
779	}
780
781	static int
782	mISDN_sock_create(struct net net, struct socket sock, int proto)
783	{
784	int err = -EPROTONOSUPPORT;
785
786	switch (proto) {
787	case ISDN_P_BASE:
788	err = base_sock_create(net, sock, proto);
789	break;
790	case ISDN_P_TE_S0:
791	case ISDN_P_NT_S0:
792	case ISDN_P_TE_E1:
793	case ISDN_P_NT_E1:
794	case ISDN_P_LAPD_TE:
795	case ISDN_P_LAPD_NT:
796	case ISDN_P_B_RAW:
797	case ISDN_P_B_HDLC:
798	case ISDN_P_B_X75SLP:
799	case ISDN_P_B_L2DTMF:
800	case ISDN_P_B_L2DSP:
801	case ISDN_P_B_L2DSPHDLC:
802	err = data_sock_create(net, sock, proto);
803	break;
804	default:
805	return err;
806	}
807
808	return err;
809	}
810
811	static struct
812	net_proto_family mISDN_sock_family_ops = {
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