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;
120 struct sockaddr_mISDN *maddr;
124 if (*debug & DEBUG_SOCKET)
125 printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
126 __func__, (int)len, flags, _pms(sk)->ch.nr,
128 if (flags & (MSG_OOB))
131 if (sk->sk_state == MISDN_CLOSED)
134 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
138 if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
139 msg->msg_namelen = sizeof(struct sockaddr_mISDN);
140 maddr = (struct sockaddr_mISDN *)msg->msg_name;
141 maddr->family = AF_ISDN;
142 maddr->dev = _pms(sk)->dev->id;
143 if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
144 (sk->sk_protocol == ISDN_P_LAPD_NT)) {
145 maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
146 maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff;
147 maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
149 maddr->channel = _pms(sk)->ch.nr;
150 maddr->sapi = _pms(sk)->ch.addr & 0xFF;
151 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
154 if (msg->msg_namelen)
155 printk(KERN_WARNING "%s: too small namelen %d\n",
156 __func__, msg->msg_namelen);
157 msg->msg_namelen = 0;
160 copied = skb->len + MISDN_HEADER_LEN;
162 if (flags & MSG_PEEK)
163 atomic_dec(&skb->users);
165 skb_queue_head(&sk->sk_receive_queue, skb);
168 memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
171 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
173 mISDN_sock_cmsg(sk, msg, skb);
175 skb_free_datagram(sk, skb);
177 return err ? : copied;
181 mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
182 struct msghdr *msg, size_t len)
184 struct sock *sk = sock->sk;
187 struct sockaddr_mISDN *maddr;
189 if (*debug & DEBUG_SOCKET)
190 printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
191 __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
194 if (msg->msg_flags & MSG_OOB)
197 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE))
200 if (len < MISDN_HEADER_LEN)
203 if (sk->sk_state != MISDN_BOUND)
208 skb = _l2_alloc_skb(len, GFP_KERNEL);
212 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
217 memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
218 skb_pull(skb, MISDN_HEADER_LEN);
220 if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
221 /* if we have a address, we use it */
222 maddr = (struct sockaddr_mISDN *)msg->msg_name;
223 mISDN_HEAD_ID(skb) = maddr->channel;
224 } else { /* use default for L2 messages */
225 if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
226 (sk->sk_protocol == ISDN_P_LAPD_NT))
227 mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
230 if (*debug & DEBUG_SOCKET)
231 printk(KERN_DEBUG "%s: ID:%x\n",
232 __func__, mISDN_HEAD_ID(skb));
235 if (!_pms(sk)->ch.peer)
237 err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
253 data_sock_release(struct socket *sock)
255 struct sock *sk = sock->sk;
257 if (*debug & DEBUG_SOCKET)
258 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
261 switch (sk->sk_protocol) {
266 if (sk->sk_state == MISDN_BOUND)
267 delete_channel(&_pms(sk)->ch);
269 mISDN_sock_unlink(&data_sockets, sk);
275 case ISDN_P_B_X75SLP:
276 case ISDN_P_B_L2DTMF:
278 case ISDN_P_B_L2DSPHDLC:
279 delete_channel(&_pms(sk)->ch);
280 mISDN_sock_unlink(&data_sockets, sk);
287 skb_queue_purge(&sk->sk_receive_queue);
296 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
298 struct mISDN_ctrl_req cq;
299 int err = -EINVAL, val[2];
300 struct mISDNchannel *bchan, *next;
303 if (!_pms(sk)->dev) {
309 if (copy_from_user(&cq, p, sizeof(cq))) {
313 if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
314 list_for_each_entry_safe(bchan, next,
315 &_pms(sk)->dev->bchannels, list) {
316 if (bchan->nr == cq.channel) {
317 err = bchan->ctrl(bchan,
318 CONTROL_CHANNEL, &cq);
323 err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
324 CONTROL_CHANNEL, &cq);
327 if (copy_to_user(p, &cq, sizeof(cq)))
331 if (sk->sk_protocol != ISDN_P_LAPD_NT) {
336 if (get_user(val[1], (int __user *)p)) {
340 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
341 CONTROL_CHANNEL, val);
344 if (sk->sk_protocol != ISDN_P_LAPD_NT
345 && sk->sk_protocol != ISDN_P_LAPD_TE) {
350 if (get_user(val[1], (int __user *)p)) {
354 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
355 CONTROL_CHANNEL, val);
367 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
370 struct sock *sk = sock->sk;
371 struct mISDNdevice *dev;
372 struct mISDNversion ver;
376 ver.major = MISDN_MAJOR_VERSION;
377 ver.minor = MISDN_MINOR_VERSION;
378 ver.release = MISDN_RELEASE;
379 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
383 id = get_mdevice_count();
384 if (put_user(id, (int __user *)arg))
388 if (get_user(id, (int __user *)arg)) {
392 dev = get_mdevice(id);
394 struct mISDN_devinfo di;
396 memset(&di, 0, sizeof(di));
398 di.Dprotocols = dev->Dprotocols;
399 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
400 di.protocol = dev->D.protocol;
401 memcpy(di.channelmap, dev->channelmap,
402 sizeof(di.channelmap));
403 di.nrbchan = dev->nrbchan;
404 strcpy(di.name, dev_name(&dev->dev));
405 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
411 if (sk->sk_state == MISDN_BOUND)
412 err = data_sock_ioctl_bound(sk, cmd,
420 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
421 char __user *optval, unsigned int len)
423 struct sock *sk = sock->sk;
424 int err = 0, opt = 0;
426 if (*debug & DEBUG_SOCKET)
427 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
428 level, optname, optval, len);
433 case MISDN_TIME_STAMP:
434 if (get_user(opt, (int __user *)optval)) {
440 _pms(sk)->cmask |= MISDN_TIME_STAMP;
442 _pms(sk)->cmask &= ~MISDN_TIME_STAMP;
452 static int data_sock_getsockopt(struct socket *sock, int level, int optname,
453 char __user *optval, int __user *optlen)
455 struct sock *sk = sock->sk;
458 if (get_user(len, optlen))
461 if (len != sizeof(char))
465 case MISDN_TIME_STAMP:
466 if (_pms(sk)->cmask & MISDN_TIME_STAMP)
471 if (put_user(opt, optval))
482 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
484 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
485 struct sock *sk = sock->sk;
486 struct hlist_node *node;
490 if (*debug & DEBUG_SOCKET)
491 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
492 if (addr_len != sizeof(struct sockaddr_mISDN))
494 if (!maddr || maddr->family != AF_ISDN)
503 _pms(sk)->dev = get_mdevice(maddr->dev);
504 if (!_pms(sk)->dev) {
509 if (sk->sk_protocol < ISDN_P_B_START) {
510 read_lock_bh(&data_sockets.lock);
511 sk_for_each(csk, node, &data_sockets.head) {
514 if (_pms(csk)->dev != _pms(sk)->dev)
516 if (csk->sk_protocol >= ISDN_P_B_START)
518 if (IS_ISDN_P_TE(csk->sk_protocol)
519 == IS_ISDN_P_TE(sk->sk_protocol))
521 read_unlock_bh(&data_sockets.lock);
525 read_unlock_bh(&data_sockets.lock);
528 _pms(sk)->ch.send = mISDN_send;
529 _pms(sk)->ch.ctrl = mISDN_ctrl;
531 switch (sk->sk_protocol) {
536 mISDN_sock_unlink(&data_sockets, sk);
537 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
538 sk->sk_protocol, maddr);
540 mISDN_sock_link(&data_sockets, sk);
544 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
545 sk->sk_protocol, maddr);
549 case ISDN_P_B_X75SLP:
550 case ISDN_P_B_L2DTMF:
552 case ISDN_P_B_L2DSPHDLC:
553 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
554 sk->sk_protocol, maddr);
557 err = -EPROTONOSUPPORT;
561 sk->sk_state = MISDN_BOUND;
562 _pms(sk)->ch.protocol = sk->sk_protocol;
570 data_sock_getname(struct socket *sock, struct sockaddr *addr,
571 int *addr_len, int peer)
573 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
574 struct sock *sk = sock->sk;
581 *addr_len = sizeof(*maddr);
582 maddr->dev = _pms(sk)->dev->id;
583 maddr->channel = _pms(sk)->ch.nr;
584 maddr->sapi = _pms(sk)->ch.addr & 0xff;
585 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
590 static const struct proto_ops data_sock_ops = {
592 .owner = THIS_MODULE,
593 .release = data_sock_release,
594 .ioctl = data_sock_ioctl,
595 .bind = data_sock_bind,
596 .getname = data_sock_getname,
597 .sendmsg = mISDN_sock_sendmsg,
598 .recvmsg = mISDN_sock_recvmsg,
599 .poll = datagram_poll,
600 .listen = sock_no_listen,
601 .shutdown = sock_no_shutdown,
602 .setsockopt = data_sock_setsockopt,
603 .getsockopt = data_sock_getsockopt,
604 .connect = sock_no_connect,
605 .socketpair = sock_no_socketpair,
606 .accept = sock_no_accept,
611 data_sock_create(struct net *net, struct socket *sock, int protocol)
615 if (sock->type != SOCK_DGRAM)
616 return -ESOCKTNOSUPPORT;
618 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
622 sock_init_data(sock, sk);
624 sock->ops = &data_sock_ops;
625 sock->state = SS_UNCONNECTED;
626 sock_reset_flag(sk, SOCK_ZAPPED);
628 sk->sk_protocol = protocol;
629 sk->sk_state = MISDN_OPEN;
630 mISDN_sock_link(&data_sockets, sk);
636 base_sock_release(struct socket *sock)
638 struct sock *sk = sock->sk;
640 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
644 mISDN_sock_unlink(&base_sockets, sk);
652 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
655 struct mISDNdevice *dev;
656 struct mISDNversion ver;
660 ver.major = MISDN_MAJOR_VERSION;
661 ver.minor = MISDN_MINOR_VERSION;
662 ver.release = MISDN_RELEASE;
663 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
667 id = get_mdevice_count();
668 if (put_user(id, (int __user *)arg))
672 if (get_user(id, (int __user *)arg)) {
676 dev = get_mdevice(id);
678 struct mISDN_devinfo di;
680 memset(&di, 0, sizeof(di));
682 di.Dprotocols = dev->Dprotocols;
683 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
684 di.protocol = dev->D.protocol;
685 memcpy(di.channelmap, dev->channelmap,
686 sizeof(di.channelmap));
687 di.nrbchan = dev->nrbchan;
688 strcpy(di.name, dev_name(&dev->dev));
689 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
696 struct mISDN_devrename dn;
697 if (copy_from_user(&dn, (void __user *)arg,
702 dev = get_mdevice(dn.id);
704 err = device_rename(&dev->dev, dn.name);
716 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
718 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
719 struct sock *sk = sock->sk;
722 if (!maddr || maddr->family != AF_ISDN)
732 _pms(sk)->dev = get_mdevice(maddr->dev);
733 if (!_pms(sk)->dev) {
737 sk->sk_state = MISDN_BOUND;
744 static const struct proto_ops base_sock_ops = {
746 .owner = THIS_MODULE,
747 .release = base_sock_release,
748 .ioctl = base_sock_ioctl,
749 .bind = base_sock_bind,
750 .getname = sock_no_getname,
751 .sendmsg = sock_no_sendmsg,
752 .recvmsg = sock_no_recvmsg,
753 .poll = sock_no_poll,
754 .listen = sock_no_listen,
755 .shutdown = sock_no_shutdown,
756 .setsockopt = sock_no_setsockopt,
757 .getsockopt = sock_no_getsockopt,
758 .connect = sock_no_connect,
759 .socketpair = sock_no_socketpair,
760 .accept = sock_no_accept,
766 base_sock_create(struct net *net, struct socket *sock, int protocol)
770 if (sock->type != SOCK_RAW)
771 return -ESOCKTNOSUPPORT;
773 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
777 sock_init_data(sock, sk);
778 sock->ops = &base_sock_ops;
779 sock->state = SS_UNCONNECTED;
780 sock_reset_flag(sk, SOCK_ZAPPED);
781 sk->sk_protocol = protocol;
782 sk->sk_state = MISDN_OPEN;
783 mISDN_sock_link(&base_sockets, sk);
789 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
791 int err = -EPROTONOSUPPORT;
795 err = base_sock_create(net, sock, proto);
805 case ISDN_P_B_X75SLP:
806 case ISDN_P_B_L2DTMF:
808 case ISDN_P_B_L2DSPHDLC:
809 err = data_sock_create(net, sock, proto);
818 static const struct net_proto_family mISDN_sock_family_ops = {
819 .owner = THIS_MODULE,
821 .create = mISDN_sock_create,
825 misdn_sock_init(u_int *deb)
830 err = sock_register(&mISDN_sock_family_ops);
832 printk(KERN_ERR "%s: error(%d)\n", __func__, err);
837 misdn_sock_cleanup(void)
839 sock_unregister(PF_ISDN);