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>
23 static struct proto mISDN_proto = {
26 .obj_size = sizeof(struct mISDN_sock)
29 #define _pms(sk) ((struct mISDN_sock *)sk)
31 static struct mISDN_sock_list data_sockets = {
32 .lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
35 static struct mISDN_sock_list base_sockets = {
36 .lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
39 #define L2_HEADER_LEN 4
41 static inline struct sk_buff *
42 _l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
46 skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
48 skb_reserve(skb, L2_HEADER_LEN);
53 mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
55 write_lock_bh(&l->lock);
56 sk_add_node(sk, &l->head);
57 write_unlock_bh(&l->lock);
60 static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
62 write_lock_bh(&l->lock);
64 write_unlock_bh(&l->lock);
68 mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
70 struct mISDN_sock *msk;
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)
79 err = sock_queue_rcv_skb(&msk->sk, skb);
81 printk(KERN_WARNING "%s: error %d\n", __func__, err);
86 mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
88 struct mISDN_sock *msk;
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);
95 msk->sk.sk_state = MISDN_CLOSED;
102 mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
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);
113 mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
114 struct msghdr *msg, size_t len, int flags)
117 struct sock *sk = sock->sk;
118 struct sockaddr_mISDN *maddr;
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,
126 if (flags & (MSG_OOB))
129 if (sk->sk_state == MISDN_CLOSED)
132 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
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;
147 maddr->channel = _pms(sk)->ch.nr;
148 maddr->sapi = _pms(sk)->ch.addr & 0xFF;
149 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
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;
158 copied = skb->len + MISDN_HEADER_LEN;
160 if (flags & MSG_PEEK)
161 atomic_dec(&skb->users);
163 skb_queue_head(&sk->sk_receive_queue, skb);
166 memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
169 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
171 mISDN_sock_cmsg(sk, msg, skb);
173 skb_free_datagram(sk, skb);
175 return err ? : copied;
179 mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
180 struct msghdr *msg, size_t len)
182 struct sock *sk = sock->sk;
185 struct sockaddr_mISDN *maddr;
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,
192 if (msg->msg_flags & MSG_OOB)
195 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
198 if (len < MISDN_HEADER_LEN)
201 if (sk->sk_state != MISDN_BOUND)
206 skb = _l2_alloc_skb(len, GFP_KERNEL);
210 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
215 memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
216 skb_pull(skb, MISDN_HEADER_LEN);
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))
225 mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
228 if (*debug & DEBUG_SOCKET)
229 printk(KERN_DEBUG "%s: ID:%x\n",
230 __func__, mISDN_HEAD_ID(skb));
233 if (!_pms(sk)->ch.peer)
235 err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
251 data_sock_release(struct socket *sock)
253 struct sock *sk = sock->sk;
255 if (*debug & DEBUG_SOCKET)
256 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
259 switch (sk->sk_protocol) {
264 if (sk->sk_state == MISDN_BOUND)
265 delete_channel(&_pms(sk)->ch);
267 mISDN_sock_unlink(&data_sockets, sk);
273 case ISDN_P_B_X75SLP:
274 case ISDN_P_B_L2DTMF:
276 case ISDN_P_B_L2DSPHDLC:
277 delete_channel(&_pms(sk)->ch);
278 mISDN_sock_unlink(&data_sockets, sk);
285 skb_queue_purge(&sk->sk_receive_queue);
294 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
296 struct mISDN_ctrl_req cq;
297 int err = -EINVAL, val[2];
298 struct mISDNchannel *bchan, *next;
301 if (!_pms(sk)->dev) {
307 if (copy_from_user(&cq, p, sizeof(cq))) {
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);
321 err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
322 CONTROL_CHANNEL, &cq);
325 if (copy_to_user(p, &cq, sizeof(cq)))
329 if (sk->sk_protocol != ISDN_P_LAPD_NT) {
334 if (get_user(val[1], (int __user *)p)) {
338 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
339 CONTROL_CHANNEL, val);
342 if (sk->sk_protocol != ISDN_P_LAPD_NT
343 && sk->sk_protocol != ISDN_P_LAPD_TE) {
348 if (get_user(val[1], (int __user *)p)) {
352 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
353 CONTROL_CHANNEL, val);
365 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
368 struct sock *sk = sock->sk;
369 struct mISDNdevice *dev;
370 struct mISDNversion ver;
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)))
381 id = get_mdevice_count();
382 if (put_user(id, (int __user *)arg))
386 if (get_user(id, (int __user *)arg)) {
390 dev = get_mdevice(id);
392 struct mISDN_devinfo di;
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,
399 sizeof(di.channelmap));
400 di.nrbchan = dev->nrbchan;
401 strcpy(di.name, dev_name(&dev->dev));
402 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
408 if (sk->sk_state == MISDN_BOUND)
409 err = data_sock_ioctl_bound(sk, cmd,
417 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
418 char __user *optval, int len)
420 struct sock *sk = sock->sk;
421 int err = 0, opt = 0;
423 if (*debug & DEBUG_SOCKET)
424 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
425 level, optname, optval, len);
430 case MISDN_TIME_STAMP:
431 if (get_user(opt, (int __user *)optval)) {
437 _pms(sk)->cmask |= MISDN_TIME_STAMP;
439 _pms(sk)->cmask &= ~MISDN_TIME_STAMP;
449 static int data_sock_getsockopt(struct socket *sock, int level, int optname,
450 char __user *optval, int __user *optlen)
452 struct sock *sk = sock->sk;
455 if (get_user(len, optlen))
459 case MISDN_TIME_STAMP:
460 if (_pms(sk)->cmask & MISDN_TIME_STAMP)
465 if (put_user(opt, optval))
476 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
478 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
479 struct sock *sk = sock->sk;
480 struct hlist_node *node;
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, node, &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->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;
584 static const struct proto_ops data_sock_ops = {
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,
605 data_sock_create(struct net *net, struct socket *sock, int protocol)
609 if (sock->type != SOCK_DGRAM)
610 return -ESOCKTNOSUPPORT;
612 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
616 sock_init_data(sock, sk);
618 sock->ops = &data_sock_ops;
619 sock->state = SS_UNCONNECTED;
620 sock_reset_flag(sk, SOCK_ZAPPED);
622 sk->sk_protocol = protocol;
623 sk->sk_state = MISDN_OPEN;
624 mISDN_sock_link(&data_sockets, sk);
630 base_sock_release(struct socket *sock)
632 struct sock *sk = sock->sk;
634 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
638 mISDN_sock_unlink(&base_sockets, sk);
646 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
649 struct mISDNdevice *dev;
650 struct mISDNversion ver;
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)))
661 id = get_mdevice_count();
662 if (put_user(id, (int __user *)arg))
666 if (get_user(id, (int __user *)arg)) {
670 dev = get_mdevice(id);
672 struct mISDN_devinfo di;
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,
679 sizeof(di.channelmap));
680 di.nrbchan = dev->nrbchan;
681 strcpy(di.name, dev_name(&dev->dev));
682 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
689 struct mISDN_devrename dn;
690 if (copy_from_user(&dn, (void __user *)arg,
695 dev = get_mdevice(dn.id);
697 err = device_rename(&dev->dev, dn.name);
709 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
711 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
712 struct sock *sk = sock->sk;
715 if (!maddr || maddr->family != AF_ISDN)
725 _pms(sk)->dev = get_mdevice(maddr->dev);
726 if (!_pms(sk)->dev) {
730 sk->sk_state = MISDN_BOUND;
737 static const struct proto_ops base_sock_ops = {
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,
759 base_sock_create(struct net *net, struct socket *sock, int protocol)
763 if (sock->type != SOCK_RAW)
764 return -ESOCKTNOSUPPORT;
766 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
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);
782 mISDN_sock_create(struct net *net, struct socket *sock, int proto)
784 int err = -EPROTONOSUPPORT;
788 err = base_sock_create(net, sock, proto);
798 case ISDN_P_B_X75SLP:
799 case ISDN_P_B_L2DTMF:
801 case ISDN_P_B_L2DSPHDLC:
802 err = data_sock_create(net, sock, proto);
812 net_proto_family mISDN_sock_family_ops = {
813 .owner = THIS_MODULE,
815 .create = mISDN_sock_create,
819 misdn_sock_init(u_int *deb)
824 err = sock_register(&mISDN_sock_family_ops);
826 printk(KERN_ERR "%s: error(%d)\n", __func__, err);
831 misdn_sock_cleanup(void)
833 sock_unregister(PF_ISDN);