2 * An implementation of the Acorn Econet and AUN protocols.
3 * Philip Blundell <philb@gnu.org>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
12 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
18 #include <linux/socket.h>
19 #include <linux/sockios.h>
21 #include <linux/errno.h>
22 #include <linux/interrupt.h>
23 #include <linux/if_ether.h>
24 #include <linux/netdevice.h>
25 #include <linux/inetdevice.h>
26 #include <linux/route.h>
27 #include <linux/inet.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/wireless.h>
31 #include <linux/skbuff.h>
32 #include <linux/udp.h>
34 #include <net/inet_common.h>
35 #include <linux/stat.h>
36 #include <linux/init.h>
37 #include <linux/if_ec.h>
40 #include <linux/spinlock.h>
41 #include <linux/rcupdate.h>
42 #include <linux/bitops.h>
43 #include <linux/mutex.h>
45 #include <asm/uaccess.h>
46 #include <asm/system.h>
48 static const struct proto_ops econet_ops;
49 static struct hlist_head econet_sklist;
50 static DEFINE_RWLOCK(econet_lock);
51 static DEFINE_MUTEX(econet_mutex);
53 /* Since there are only 256 possible network numbers (or fewer, depends
54 how you count) it makes sense to use a simple lookup table. */
55 static struct net_device *net2dev_map[256];
57 #define EC_PORT_IP 0xd2
59 #ifdef CONFIG_ECONET_AUNUDP
60 static DEFINE_SPINLOCK(aun_queue_lock);
61 static struct socket *udpsock;
62 #define AUN_PORT 0x8000
67 unsigned char code; /* AUN magic protocol byte */
74 static unsigned long aun_seq;
76 /* Queue of packets waiting to be transmitted. */
77 static struct sk_buff_head aun_queue;
78 static struct timer_list ab_cleanup_timer;
80 #endif /* CONFIG_ECONET_AUNUDP */
82 /* Per-packet information */
85 struct sockaddr_ec sec;
86 unsigned long cookie; /* Supplied by user. */
87 #ifdef CONFIG_ECONET_AUNUDP
89 unsigned long seq; /* Sequencing */
90 unsigned long timeout; /* Timeout */
91 unsigned long start; /* jiffies */
93 #ifdef CONFIG_ECONET_NATIVE
94 void (*sent)(struct sk_buff *, int result);
98 static void econet_remove_socket(struct hlist_head *list, struct sock *sk)
100 write_lock_bh(&econet_lock);
101 sk_del_node_init(sk);
102 write_unlock_bh(&econet_lock);
105 static void econet_insert_socket(struct hlist_head *list, struct sock *sk)
107 write_lock_bh(&econet_lock);
108 sk_add_node(sk, list);
109 write_unlock_bh(&econet_lock);
113 * Pull a packet from our receive queue and hand it to the user.
114 * If necessary we block.
117 static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
118 struct msghdr *msg, size_t len, int flags)
120 struct sock *sk = sock->sk;
125 msg->msg_namelen = sizeof(struct sockaddr_ec);
127 mutex_lock(&econet_mutex);
130 * Call the generic datagram receiver. This handles all sorts
131 * of horrible races and re-entrancy so we can forget about it
132 * in the protocol layers.
134 * Now it will return ENETDOWN, if device have just gone down,
135 * but then it will block.
138 skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err);
141 * An error occurred so return it. Because skb_recv_datagram()
142 * handles the blocking we don't see and worry about blocking
150 * You lose any data beyond the buffer you gave. If it worries a
151 * user program they can ask the device for its MTU anyway.
158 msg->msg_flags|=MSG_TRUNC;
161 /* We can't use skb_copy_datagram here */
162 err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
165 sk->sk_stamp = skb->tstamp;
168 memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
171 * Free or return the buffer as appropriate. Again this
172 * hides all the races and re-entrancy issues from us.
177 skb_free_datagram(sk, skb);
179 mutex_unlock(&econet_mutex);
184 * Bind an Econet socket.
187 static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
189 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
191 struct econet_sock *eo;
197 if (addr_len < sizeof(struct sockaddr_ec) ||
198 sec->sec_family != AF_ECONET)
201 mutex_lock(&econet_mutex);
207 eo->port = sec->port;
208 eo->station = sec->addr.station;
209 eo->net = sec->addr.net;
211 mutex_unlock(&econet_mutex);
216 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
218 * Queue a transmit result for the user to be told about.
221 static void tx_result(struct sock *sk, unsigned long cookie, int result)
223 struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
225 struct sockaddr_ec *sec;
229 printk(KERN_DEBUG "ec: memory squeeze, transmit result dropped.\n");
233 eb = (struct ec_cb *)&skb->cb;
234 sec = (struct sockaddr_ec *)&eb->sec;
235 memset(sec, 0, sizeof(struct sockaddr_ec));
236 sec->cookie = cookie;
237 sec->type = ECTYPE_TRANSMIT_STATUS | result;
238 sec->sec_family = AF_ECONET;
240 if (sock_queue_rcv_skb(sk, skb) < 0)
245 #ifdef CONFIG_ECONET_NATIVE
247 * Called by the Econet hardware driver when a packet transmit
248 * has completed. Tell the user.
251 static void ec_tx_done(struct sk_buff *skb, int result)
253 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
254 tx_result(skb->sk, eb->cookie, result);
259 * Send a packet. We have to work out which device it's going out on
260 * and hence whether to use real Econet or the UDP emulation.
263 static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
264 struct msghdr *msg, size_t len)
266 struct sock *sk = sock->sk;
267 struct sockaddr_ec *saddr=(struct sockaddr_ec *)msg->msg_name;
268 struct net_device *dev;
271 unsigned char port, cb;
272 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
276 #ifdef CONFIG_ECONET_AUNUDP
277 struct msghdr udpmsg;
278 struct iovec iov[msg->msg_iovlen+1];
280 struct sockaddr_in udpdest;
281 __kernel_size_t size;
290 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
294 * Get and verify the address.
297 mutex_lock(&econet_mutex);
299 if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) {
300 mutex_unlock(&econet_mutex);
303 addr.station = saddr->addr.station;
304 addr.net = saddr->addr.net;
308 /* Look for a device with the right network number. */
309 dev = net2dev_map[addr.net];
311 /* If not directly reachable, use some default */
313 dev = net2dev_map[0];
314 /* No interfaces at all? */
316 mutex_unlock(&econet_mutex);
321 if (len + 15 > dev->mtu) {
322 mutex_unlock(&econet_mutex);
326 if (dev->type == ARPHRD_ECONET) {
327 /* Real hardware Econet. We're not worthy etc. */
328 #ifdef CONFIG_ECONET_NATIVE
329 unsigned short proto = 0;
334 skb = sock_alloc_send_skb(sk, len+LL_ALLOCATED_SPACE(dev),
335 msg->msg_flags & MSG_DONTWAIT, &err);
339 skb_reserve(skb, LL_RESERVED_SPACE(dev));
340 skb_reset_network_header(skb);
342 eb = (struct ec_cb *)&skb->cb;
344 eb->cookie = saddr->cookie;
346 eb->sent = ec_tx_done;
349 res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len);
353 struct ec_framehdr *fh;
354 /* Poke in our control byte and
355 port number. Hack, hack. */
356 fh = (struct ec_framehdr *)(skb->data);
359 if (sock->type != SOCK_DGRAM) {
360 skb_reset_tail_pointer(skb);
365 /* Copy the data. Returns -EFAULT on error */
366 err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
367 skb->protocol = proto;
369 skb->priority = sk->sk_priority;
374 if (!(dev->flags & IFF_UP))
383 mutex_unlock(&econet_mutex);
394 mutex_unlock(&econet_mutex);
399 #ifdef CONFIG_ECONET_AUNUDP
400 /* AUN virtual Econet. */
402 if (udpsock == NULL) {
403 mutex_unlock(&econet_mutex);
404 return -ENETDOWN; /* No socket - can't send */
407 /* Make up a UDP datagram and hand it off to some higher intellect. */
409 memset(&udpdest, 0, sizeof(udpdest));
410 udpdest.sin_family = AF_INET;
411 udpdest.sin_port = htons(AUN_PORT);
413 /* At the moment we use the stupid Acorn scheme of Econet address
414 y.x maps to IP a.b.c.x. This should be replaced with something
415 more flexible and more aware of subnet masks. */
417 struct in_device *idev;
418 unsigned long network = 0;
421 idev = __in_dev_get_rcu(dev);
424 network = ntohl(idev->ifa_list->ifa_address) &
425 0xffffff00; /* !!! */
428 udpdest.sin_addr.s_addr = htonl(network | addr.station);
433 ah.code = 2; /* magic */
436 /* tack our header on the front of the iovec */
437 size = sizeof(struct aunhdr);
439 * XXX: that is b0rken. We can't mix userland and kernel pointers
440 * in iovec, since on a lot of platforms copy_from_user() will
441 * *not* work with the kernel and userland ones at the same time,
442 * regardless of what we do with set_fs(). And we are talking about
443 * econet-over-ethernet here, so "it's only ARM anyway" doesn't
444 * apply. Any suggestions on fixing that code? -- AV
446 iov[0].iov_base = (void *)&ah;
447 iov[0].iov_len = size;
448 for (i = 0; i < msg->msg_iovlen; i++) {
449 void __user *base = msg->msg_iov[i].iov_base;
450 size_t len = msg->msg_iov[i].iov_len;
451 /* Check it now since we switch to KERNEL_DS later. */
452 if (!access_ok(VERIFY_READ, base, len)) {
453 mutex_unlock(&econet_mutex);
456 iov[i+1].iov_base = base;
457 iov[i+1].iov_len = len;
461 /* Get a skbuff (no data, just holds our cb information) */
462 if ((skb = sock_alloc_send_skb(sk, 0,
463 msg->msg_flags & MSG_DONTWAIT,
465 mutex_unlock(&econet_mutex);
469 eb = (struct ec_cb *)&skb->cb;
471 eb->cookie = saddr->cookie;
472 eb->timeout = (5*HZ);
475 eb->seq = (aun_seq++);
478 skb_queue_tail(&aun_queue, skb);
480 udpmsg.msg_name = (void *)&udpdest;
481 udpmsg.msg_namelen = sizeof(udpdest);
482 udpmsg.msg_iov = &iov[0];
483 udpmsg.msg_iovlen = msg->msg_iovlen + 1;
484 udpmsg.msg_control = NULL;
485 udpmsg.msg_controllen = 0;
488 oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */
489 err = sock_sendmsg(udpsock, &udpmsg, size);
494 mutex_unlock(&econet_mutex);
500 * Look up the address of a socket.
503 static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
504 int *uaddr_len, int peer)
507 struct econet_sock *eo;
508 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
513 memset(sec, 0, sizeof(*sec));
514 mutex_lock(&econet_mutex);
519 sec->sec_family = AF_ECONET;
520 sec->port = eo->port;
521 sec->addr.station = eo->station;
522 sec->addr.net = eo->net;
524 mutex_unlock(&econet_mutex);
526 *uaddr_len = sizeof(*sec);
530 static void econet_destroy_timer(unsigned long data)
532 struct sock *sk=(struct sock *)data;
534 if (!sk_has_allocations(sk)) {
539 sk->sk_timer.expires = jiffies + 10 * HZ;
540 add_timer(&sk->sk_timer);
541 printk(KERN_DEBUG "econet socket destroy delayed\n");
545 * Close an econet socket.
548 static int econet_release(struct socket *sock)
552 mutex_lock(&econet_mutex);
558 econet_remove_socket(&econet_sklist, sk);
561 * Now the socket is dead. No more input will appear.
564 sk->sk_state_change(sk); /* It is useless. Just for sanity. */
570 skb_queue_purge(&sk->sk_receive_queue);
572 if (sk_has_allocations(sk)) {
573 sk->sk_timer.data = (unsigned long)sk;
574 sk->sk_timer.expires = jiffies + HZ;
575 sk->sk_timer.function = econet_destroy_timer;
576 add_timer(&sk->sk_timer);
584 mutex_unlock(&econet_mutex);
588 static struct proto econet_proto = {
590 .owner = THIS_MODULE,
591 .obj_size = sizeof(struct econet_sock),
595 * Create an Econet socket
598 static int econet_create(struct net *net, struct socket *sock, int protocol)
601 struct econet_sock *eo;
604 if (net != &init_net)
605 return -EAFNOSUPPORT;
607 /* Econet only provides datagram services. */
608 if (sock->type != SOCK_DGRAM)
609 return -ESOCKTNOSUPPORT;
611 sock->state = SS_UNCONNECTED;
614 sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto);
619 sock->ops = &econet_ops;
620 sock_init_data(sock, sk);
623 sock_reset_flag(sk, SOCK_ZAPPED);
624 sk->sk_family = PF_ECONET;
627 econet_insert_socket(&econet_sklist, sk);
634 * Handle Econet specific ioctls
637 static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
640 struct ec_device *edev;
641 struct net_device *dev;
642 struct sockaddr_ec *sec;
646 * Fetch the caller's info block into kernel space
649 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
652 if ((dev = dev_get_by_name(&init_net, ifr.ifr_name)) == NULL)
655 sec = (struct sockaddr_ec *)&ifr.ifr_addr;
657 mutex_lock(&econet_mutex);
662 if (!capable(CAP_NET_ADMIN))
667 /* Magic up a new one. */
668 edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL);
675 net2dev_map[edev->net] = NULL;
676 edev->station = sec->addr.station;
677 edev->net = sec->addr.net;
678 net2dev_map[sec->addr.net] = dev;
680 net2dev_map[0] = dev;
689 memset(sec, 0, sizeof(struct sockaddr_ec));
690 sec->addr.station = edev->station;
691 sec->addr.net = edev->net;
692 sec->sec_family = AF_ECONET;
694 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
703 mutex_unlock(&econet_mutex);
711 * Handle generic ioctls
714 static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
716 struct sock *sk = sock->sk;
717 void __user *argp = (void __user *)arg;
721 return sock_get_timestamp(sk, argp);
724 return sock_get_timestampns(sk, argp);
728 return ec_dev_ioctl(sock, cmd, argp);
738 static struct net_proto_family econet_family_ops = {
740 .create = econet_create,
741 .owner = THIS_MODULE,
744 static const struct proto_ops econet_ops = {
746 .owner = THIS_MODULE,
747 .release = econet_release,
749 .connect = sock_no_connect,
750 .socketpair = sock_no_socketpair,
751 .accept = sock_no_accept,
752 .getname = econet_getname,
753 .poll = datagram_poll,
754 .ioctl = econet_ioctl,
755 .listen = sock_no_listen,
756 .shutdown = sock_no_shutdown,
757 .setsockopt = sock_no_setsockopt,
758 .getsockopt = sock_no_getsockopt,
759 .sendmsg = econet_sendmsg,
760 .recvmsg = econet_recvmsg,
761 .mmap = sock_no_mmap,
762 .sendpage = sock_no_sendpage,
765 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
767 * Find the listening socket, if any, for the given data.
770 static struct sock *ec_listening_socket(unsigned char port, unsigned char
771 station, unsigned char net)
774 struct hlist_node *node;
776 sk_for_each(sk, node, &econet_sklist) {
777 struct econet_sock *opt = ec_sk(sk);
778 if ((opt->port == port || opt->port == 0) &&
779 (opt->station == station || opt->station == 0) &&
780 (opt->net == net || opt->net == 0))
789 * Queue a received packet for a socket.
792 static int ec_queue_packet(struct sock *sk, struct sk_buff *skb,
793 unsigned char stn, unsigned char net,
794 unsigned char cb, unsigned char port)
796 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
797 struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec;
799 memset(sec, 0, sizeof(struct sockaddr_ec));
800 sec->sec_family = AF_ECONET;
801 sec->type = ECTYPE_PACKET_RECEIVED;
805 sec->addr.station = stn;
807 return sock_queue_rcv_skb(sk, skb);
811 #ifdef CONFIG_ECONET_AUNUDP
813 * Send an AUN protocol response.
816 static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb)
818 struct sockaddr_in sin = {
819 .sin_family = AF_INET,
820 .sin_port = htons(AUN_PORT),
821 .sin_addr = {.s_addr = addr}
823 struct aunhdr ah = {.code = code, .cb = cb, .handle = seq};
824 struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)};
825 struct msghdr udpmsg;
827 udpmsg.msg_name = (void *)&sin;
828 udpmsg.msg_namelen = sizeof(sin);
829 udpmsg.msg_control = NULL;
830 udpmsg.msg_controllen = 0;
833 kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah));
838 * Handle incoming AUN packets. Work out if anybody wants them,
839 * and send positive or negative acknowledgements as appropriate.
842 static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
844 struct iphdr *ip = ip_hdr(skb);
845 unsigned char stn = ntohl(ip->saddr) & 0xff;
847 struct sk_buff *newskb;
848 struct ec_device *edev = skb->dev->ec_ptr;
853 if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL)
854 goto bad; /* Nobody wants it */
856 newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15,
860 printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n");
861 /* Send nack and hope sender tries again */
865 memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1),
866 len - sizeof(struct aunhdr));
868 if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port))
870 /* Socket is bankrupt. */
875 aun_send_response(ip->saddr, ah->handle, 3, 0);
879 aun_send_response(ip->saddr, ah->handle, 4, 0);
883 * Handle incoming AUN transmit acknowledgements. If the sequence
884 * number matches something in our backlog then kill it and tell
885 * the user. If the remote took too long to reply then we may have
886 * dropped the packet already.
889 static void aun_tx_ack(unsigned long seq, int result)
895 spin_lock_irqsave(&aun_queue_lock, flags);
896 skb_queue_walk(&aun_queue, skb) {
897 eb = (struct ec_cb *)&skb->cb;
901 spin_unlock_irqrestore(&aun_queue_lock, flags);
902 printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq);
906 tx_result(skb->sk, eb->cookie, result);
907 skb_unlink(skb, &aun_queue);
908 spin_unlock_irqrestore(&aun_queue_lock, flags);
913 * Deal with received AUN frames - sort out what type of thing it is
914 * and hand it to the right function.
917 static void aun_data_available(struct sock *sk, int slen)
926 while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) {
927 if (err == -EAGAIN) {
928 printk(KERN_ERR "AUN: no data available?!");
931 printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err);
934 data = skb_transport_header(skb) + sizeof(struct udphdr);
935 ah = (struct aunhdr *)data;
936 len = skb->len - sizeof(struct udphdr);
942 aun_incoming(skb, ah, len);
945 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK);
948 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING);
951 /* This isn't quite right yet. */
953 aun_send_response(ip->saddr, ah->handle, 6, ah->cb);
957 printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]);
960 skb_free_datagram(sk, skb);
964 * Called by the timer to manage the AUN transmit queue. If a packet
965 * was sent to a dead or nonexistent host then we will never get an
966 * acknowledgement back. After a few seconds we need to spot this and
970 static void ab_cleanup(unsigned long h)
972 struct sk_buff *skb, *n;
975 spin_lock_irqsave(&aun_queue_lock, flags);
976 skb_queue_walk_safe(&aun_queue, skb, n) {
977 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
978 if ((jiffies - eb->start) > eb->timeout) {
979 tx_result(skb->sk, eb->cookie,
980 ECTYPE_TRANSMIT_NOT_PRESENT);
981 skb_unlink(skb, &aun_queue);
985 spin_unlock_irqrestore(&aun_queue_lock, flags);
987 mod_timer(&ab_cleanup_timer, jiffies + (HZ*2));
990 static int __init aun_udp_initialise(void)
993 struct sockaddr_in sin;
995 skb_queue_head_init(&aun_queue);
996 spin_lock_init(&aun_queue_lock);
997 setup_timer(&ab_cleanup_timer, ab_cleanup, 0);
998 ab_cleanup_timer.expires = jiffies + (HZ*2);
999 add_timer(&ab_cleanup_timer);
1001 memset(&sin, 0, sizeof(sin));
1002 sin.sin_port = htons(AUN_PORT);
1004 /* We can count ourselves lucky Acorn machines are too dim to
1006 if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0)
1008 printk("AUN: socket error %d\n", -error);
1012 udpsock->sk->sk_reuse = 1;
1013 udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it
1016 error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin,
1020 printk("AUN: bind error %d\n", -error);
1024 udpsock->sk->sk_data_ready = aun_data_available;
1029 sock_release(udpsock);
1035 #ifdef CONFIG_ECONET_NATIVE
1038 * Receive an Econet frame from a device.
1041 static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1043 struct ec_framehdr *hdr;
1045 struct ec_device *edev = dev->ec_ptr;
1047 if (!net_eq(dev_net(dev), &init_net))
1050 if (skb->pkt_type == PACKET_OTHERHOST)
1056 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1059 if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
1062 hdr = (struct ec_framehdr *) skb->data;
1064 /* First check for encapsulated IP */
1065 if (hdr->port == EC_PORT_IP) {
1066 skb->protocol = htons(ETH_P_IP);
1067 skb_pull(skb, sizeof(struct ec_framehdr));
1069 return NET_RX_SUCCESS;
1072 sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
1076 if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb,
1080 return NET_RX_SUCCESS;
1087 static struct packet_type econet_packet_type __read_mostly = {
1088 .type = cpu_to_be16(ETH_P_ECONET),
1092 static void econet_hw_initialise(void)
1094 dev_add_pack(&econet_packet_type);
1099 static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data)
1101 struct net_device *dev = (struct net_device *)data;
1102 struct ec_device *edev;
1104 if (!net_eq(dev_net(dev), &init_net))
1108 case NETDEV_UNREGISTER:
1109 /* A device has gone down - kill any data we hold for it. */
1113 if (net2dev_map[0] == dev)
1114 net2dev_map[0] = NULL;
1115 net2dev_map[edev->net] = NULL;
1125 static struct notifier_block econet_netdev_notifier = {
1126 .notifier_call =econet_notifier,
1129 static void __exit econet_proto_exit(void)
1131 #ifdef CONFIG_ECONET_AUNUDP
1132 del_timer(&ab_cleanup_timer);
1134 sock_release(udpsock);
1136 unregister_netdevice_notifier(&econet_netdev_notifier);
1137 #ifdef CONFIG_ECONET_NATIVE
1138 dev_remove_pack(&econet_packet_type);
1140 sock_unregister(econet_family_ops.family);
1141 proto_unregister(&econet_proto);
1144 static int __init econet_proto_init(void)
1146 int err = proto_register(&econet_proto, 0);
1150 sock_register(&econet_family_ops);
1151 #ifdef CONFIG_ECONET_AUNUDP
1152 spin_lock_init(&aun_queue_lock);
1153 aun_udp_initialise();
1155 #ifdef CONFIG_ECONET_NATIVE
1156 econet_hw_initialise();
1158 register_netdevice_notifier(&econet_netdev_notifier);
1163 module_init(econet_proto_init);
1164 module_exit(econet_proto_exit);
1166 MODULE_LICENSE("GPL");
1167 MODULE_ALIAS_NETPROTO(PF_ECONET);