3 * Author Karsten Keil <kkeil@novell.com>
5 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
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.
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.
18 #include <linux/mISDNif.h>
19 #include <linux/slab.h>
20 #include <linux/export.h>
25 static struct proto mISDN_proto = {
28 .obj_size = sizeof(struct mISDN_sock)
31 #define _pms(sk) ((struct mISDN_sock *)sk)
33 static struct mISDN_sock_list data_sockets = {
34 .lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
37 static struct mISDN_sock_list base_sockets = {
38 .lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
41 #define L2_HEADER_LEN 4
43 static inline struct sk_buff *
44 _l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
48 skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
50 skb_reserve(skb, L2_HEADER_LEN);
55 mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
57 write_lock_bh(&l->lock);
58 sk_add_node(sk, &l->head);
59 write_unlock_bh(&l->lock);
62 static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
64 write_lock_bh(&l->lock);
66 write_unlock_bh(&l->lock);
70 mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
72 struct mISDN_sock *msk;
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)
81 err = sock_queue_rcv_skb(&msk->sk, skb);
83 printk(KERN_WARNING "%s: error %d\n", __func__, err);
88 mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
90 struct mISDN_sock *msk;
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);
97 msk->sk.sk_state = MISDN_CLOSED;
104 mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
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);
115 mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
116 struct msghdr *msg, size_t len, int flags)
119 struct sock *sk = sock->sk;
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,
127 if (flags & (MSG_OOB))
130 if (sk->sk_state == MISDN_CLOSED)
133 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
138 struct sockaddr_mISDN *maddr = 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;
148 maddr->channel = _pms(sk)->ch.nr;
149 maddr->sapi = _pms(sk)->ch.addr & 0xFF;
150 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
152 msg->msg_namelen = sizeof(*maddr);
155 copied = skb->len + MISDN_HEADER_LEN;
157 if (flags & MSG_PEEK)
158 atomic_dec(&skb->users);
160 skb_queue_head(&sk->sk_receive_queue, skb);
163 memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
166 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
168 mISDN_sock_cmsg(sk, msg, skb);
170 skb_free_datagram(sk, skb);
172 return err ? : copied;
176 mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
177 struct msghdr *msg, size_t len)
179 struct sock *sk = sock->sk;
182 struct sockaddr_mISDN *maddr;
184 if (*debug & DEBUG_SOCKET)
185 printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
186 __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
189 if (msg->msg_flags & MSG_OOB)
192 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE))
195 if (len < MISDN_HEADER_LEN)
198 if (sk->sk_state != MISDN_BOUND)
203 skb = _l2_alloc_skb(len, GFP_KERNEL);
207 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
212 memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
213 skb_pull(skb, MISDN_HEADER_LEN);
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))
222 mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
225 if (*debug & DEBUG_SOCKET)
226 printk(KERN_DEBUG "%s: ID:%x\n",
227 __func__, mISDN_HEAD_ID(skb));
230 if (!_pms(sk)->ch.peer)
232 err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
248 data_sock_release(struct socket *sock)
250 struct sock *sk = sock->sk;
252 if (*debug & DEBUG_SOCKET)
253 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
256 switch (sk->sk_protocol) {
261 if (sk->sk_state == MISDN_BOUND)
262 delete_channel(&_pms(sk)->ch);
264 mISDN_sock_unlink(&data_sockets, sk);
270 case ISDN_P_B_X75SLP:
271 case ISDN_P_B_L2DTMF:
273 case ISDN_P_B_L2DSPHDLC:
274 delete_channel(&_pms(sk)->ch);
275 mISDN_sock_unlink(&data_sockets, sk);
282 skb_queue_purge(&sk->sk_receive_queue);
291 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
293 struct mISDN_ctrl_req cq;
294 int err = -EINVAL, val[2];
295 struct mISDNchannel *bchan, *next;
298 if (!_pms(sk)->dev) {
304 if (copy_from_user(&cq, p, sizeof(cq))) {
308 if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
309 list_for_each_entry_safe(bchan, next,
310 &_pms(sk)->dev->bchannels, list) {
311 if (bchan->nr == cq.channel) {
312 err = bchan->ctrl(bchan,
313 CONTROL_CHANNEL, &cq);
318 err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
319 CONTROL_CHANNEL, &cq);
322 if (copy_to_user(p, &cq, sizeof(cq)))
326 if (sk->sk_protocol != ISDN_P_LAPD_NT) {
331 if (get_user(val[1], (int __user *)p)) {
335 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
336 CONTROL_CHANNEL, val);
339 if (sk->sk_protocol != ISDN_P_LAPD_NT
340 && sk->sk_protocol != ISDN_P_LAPD_TE) {
345 if (get_user(val[1], (int __user *)p)) {
349 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
350 CONTROL_CHANNEL, val);
362 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
365 struct sock *sk = sock->sk;
366 struct mISDNdevice *dev;
367 struct mISDNversion ver;
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)))
378 id = get_mdevice_count();
379 if (put_user(id, (int __user *)arg))
383 if (get_user(id, (int __user *)arg)) {
387 dev = get_mdevice(id);
389 struct mISDN_devinfo di;
391 memset(&di, 0, sizeof(di));
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,
397 sizeof(di.channelmap));
398 di.nrbchan = dev->nrbchan;
399 strcpy(di.name, dev_name(&dev->dev));
400 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
406 if (sk->sk_state == MISDN_BOUND)
407 err = data_sock_ioctl_bound(sk, cmd,
415 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
416 char __user *optval, unsigned int len)
418 struct sock *sk = sock->sk;
419 int err = 0, opt = 0;
421 if (*debug & DEBUG_SOCKET)
422 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
423 level, optname, optval, len);
428 case MISDN_TIME_STAMP:
429 if (get_user(opt, (int __user *)optval)) {
435 _pms(sk)->cmask |= MISDN_TIME_STAMP;
437 _pms(sk)->cmask &= ~MISDN_TIME_STAMP;
447 static int data_sock_getsockopt(struct socket *sock, int level, int optname,
448 char __user *optval, int __user *optlen)
450 struct sock *sk = sock->sk;
453 if (get_user(len, optlen))
456 if (len != sizeof(char))
460 case MISDN_TIME_STAMP:
461 if (_pms(sk)->cmask & MISDN_TIME_STAMP)
466 if (put_user(opt, optval))
477 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
479 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
480 struct sock *sk = sock->sk;
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))
488 if (!maddr || maddr->family != AF_ISDN)
497 _pms(sk)->dev = get_mdevice(maddr->dev);
498 if (!_pms(sk)->dev) {
503 if (sk->sk_protocol < ISDN_P_B_START) {
504 read_lock_bh(&data_sockets.lock);
505 sk_for_each(csk, &data_sockets.head) {
508 if (_pms(csk)->dev != _pms(sk)->dev)
510 if (csk->sk_protocol >= ISDN_P_B_START)
512 if (IS_ISDN_P_TE(csk->sk_protocol)
513 == IS_ISDN_P_TE(sk->sk_protocol))
515 read_unlock_bh(&data_sockets.lock);
519 read_unlock_bh(&data_sockets.lock);
522 _pms(sk)->ch.send = mISDN_send;
523 _pms(sk)->ch.ctrl = mISDN_ctrl;
525 switch (sk->sk_protocol) {
530 mISDN_sock_unlink(&data_sockets, sk);
531 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
532 sk->sk_protocol, maddr);
534 mISDN_sock_link(&data_sockets, sk);
538 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
539 sk->sk_protocol, maddr);
543 case ISDN_P_B_X75SLP:
544 case ISDN_P_B_L2DTMF:
546 case ISDN_P_B_L2DSPHDLC:
547 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
548 sk->sk_protocol, maddr);
551 err = -EPROTONOSUPPORT;
555 sk->sk_state = MISDN_BOUND;
556 _pms(sk)->ch.protocol = sk->sk_protocol;
564 data_sock_getname(struct socket *sock, struct sockaddr *addr,
565 int *addr_len, int peer)
567 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
568 struct sock *sk = sock->sk;
575 *addr_len = sizeof(*maddr);
576 maddr->family = AF_ISDN;
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;
585 static const struct proto_ops data_sock_ops = {
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,
606 data_sock_create(struct net *net, struct socket *sock, int protocol)
610 if (sock->type != SOCK_DGRAM)
611 return -ESOCKTNOSUPPORT;
613 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
617 sock_init_data(sock, sk);
619 sock->ops = &data_sock_ops;
620 sock->state = SS_UNCONNECTED;
621 sock_reset_flag(sk, SOCK_ZAPPED);
623 sk->sk_protocol = protocol;
624 sk->sk_state = MISDN_OPEN;
625 mISDN_sock_link(&data_sockets, sk);
631 base_sock_release(struct socket *sock)
633 struct sock *sk = sock->sk;
635 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
639 mISDN_sock_unlink(&base_sockets, sk);
647 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
650 struct mISDNdevice *dev;
651 struct mISDNversion ver;
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)))
662 id = get_mdevice_count();
663 if (put_user(id, (int __user *)arg))
667 if (get_user(id, (int __user *)arg)) {
671 dev = get_mdevice(id);
673 struct mISDN_devinfo di;
675 memset(&di, 0, sizeof(di));
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,
681 sizeof(di.channelmap));
682 di.nrbchan = dev->nrbchan;
683 strcpy(di.name, dev_name(&dev->dev));
684 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
691 struct mISDN_devrename dn;
692 if (copy_from_user(&dn, (void __user *)arg,
697 dev = get_mdevice(dn.id);
699 err = device_rename(&dev->dev, dn.name);
711 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
713 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
714 struct sock *sk = sock->sk;
717 if (!maddr || maddr->family != AF_ISDN)
727 _pms(sk)->dev = get_mdevice(maddr->dev);
728 if (!_pms(sk)->dev) {
732 sk->sk_state = MISDN_BOUND;
739 static const struct proto_ops base_sock_ops = {
741 .owner = THIS_MODULE,
742 .release = base_sock_release,
743 .ioctl = base_sock_ioctl,
744 .bind = base_sock_bind,
745 .getname = sock_no_getname,
746 .sendmsg = sock_no_sendmsg,
747 .recvmsg = sock_no_recvmsg,
748 .poll = sock_no_poll,
749 .listen = sock_no_listen,
750 .shutdown = sock_no_shutdown,
751 .setsockopt = sock_no_setsockopt,
752 .getsockopt = sock_no_getsockopt,
753 .connect = sock_no_connect,
754 .socketpair = sock_no_socketpair,
755 .accept = sock_no_accept,
761 base_sock_create(struct net *net, struct socket *sock, int protocol)
765 if (sock->type != SOCK_RAW)
766 return -ESOCKTNOSUPPORT;
768 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
772 sock_init_data(sock, sk);
773 sock->ops = &base_sock_ops;
774 sock->state = SS_UNCONNECTED;
775 sock_reset_flag(sk, SOCK_ZAPPED);
776 sk->sk_protocol = protocol;
777 sk->sk_state = MISDN_OPEN;
778 mISDN_sock_link(&base_sockets, sk);
784 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
786 int err = -EPROTONOSUPPORT;
790 err = base_sock_create(net, sock, proto);
800 case ISDN_P_B_X75SLP:
801 case ISDN_P_B_L2DTMF:
803 case ISDN_P_B_L2DSPHDLC:
804 err = data_sock_create(net, sock, proto);
813 static const struct net_proto_family mISDN_sock_family_ops = {
814 .owner = THIS_MODULE,
816 .create = mISDN_sock_create,
820 misdn_sock_init(u_int *deb)
825 err = sock_register(&mISDN_sock_family_ops);
827 printk(KERN_ERR "%s: error(%d)\n", __func__, err);
832 misdn_sock_cleanup(void)
834 sock_unregister(PF_ISDN);