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/config.h>
13 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/sched.h>
18 #include <linux/string.h>
20 #include <linux/socket.h>
21 #include <linux/sockios.h>
23 #include <linux/errno.h>
24 #include <linux/interrupt.h>
25 #include <linux/if_ether.h>
26 #include <linux/netdevice.h>
27 #include <linux/inetdevice.h>
28 #include <linux/route.h>
29 #include <linux/inet.h>
30 #include <linux/etherdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/wireless.h>
33 #include <linux/skbuff.h>
35 #include <net/inet_common.h>
36 #include <linux/stat.h>
37 #include <linux/init.h>
38 #include <linux/if_ec.h>
41 #include <linux/spinlock.h>
42 #include <linux/rcupdate.h>
43 #include <linux/bitops.h>
45 #include <asm/uaccess.h>
46 #include <asm/system.h>
48 static struct proto_ops econet_ops;
49 static struct hlist_head econet_sklist;
50 static DEFINE_RWLOCK(econet_lock);
52 /* Since there are only 256 possible network numbers (or fewer, depends
53 how you count) it makes sense to use a simple lookup table. */
54 static struct net_device *net2dev_map[256];
56 #define EC_PORT_IP 0xd2
58 #ifdef CONFIG_ECONET_AUNUDP
59 static spinlock_t aun_queue_lock;
60 static struct socket *udpsock;
61 #define AUN_PORT 0x8000
66 unsigned char code; /* AUN magic protocol byte */
73 static unsigned long aun_seq;
75 /* Queue of packets waiting to be transmitted. */
76 static struct sk_buff_head aun_queue;
77 static struct timer_list ab_cleanup_timer;
79 #endif /* CONFIG_ECONET_AUNUDP */
81 /* Per-packet information */
84 struct sockaddr_ec sec;
85 unsigned long cookie; /* Supplied by user. */
86 #ifdef CONFIG_ECONET_AUNUDP
88 unsigned long seq; /* Sequencing */
89 unsigned long timeout; /* Timeout */
90 unsigned long start; /* jiffies */
92 #ifdef CONFIG_ECONET_NATIVE
93 void (*sent)(struct sk_buff *, int result);
97 static void econet_remove_socket(struct hlist_head *list, struct sock *sk)
99 write_lock_bh(&econet_lock);
100 sk_del_node_init(sk);
101 write_unlock_bh(&econet_lock);
104 static void econet_insert_socket(struct hlist_head *list, struct sock *sk)
106 write_lock_bh(&econet_lock);
107 sk_add_node(sk, list);
108 write_unlock_bh(&econet_lock);
112 * Pull a packet from our receive queue and hand it to the user.
113 * If necessary we block.
116 static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
117 struct msghdr *msg, size_t len, int flags)
119 struct sock *sk = sock->sk;
124 msg->msg_namelen = sizeof(struct sockaddr_ec);
127 * Call the generic datagram receiver. This handles all sorts
128 * of horrible races and re-entrancy so we can forget about it
129 * in the protocol layers.
131 * Now it will return ENETDOWN, if device have just gone down,
132 * but then it will block.
135 skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err);
138 * An error occurred so return it. Because skb_recv_datagram()
139 * handles the blocking we don't see and worry about blocking
147 * You lose any data beyond the buffer you gave. If it worries a
148 * user program they can ask the device for its MTU anyway.
155 msg->msg_flags|=MSG_TRUNC;
158 /* We can't use skb_copy_datagram here */
159 err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
162 skb_get_timestamp(skb, &sk->sk_stamp);
165 memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
168 * Free or return the buffer as appropriate. Again this
169 * hides all the races and re-entrancy issues from us.
174 skb_free_datagram(sk, skb);
180 * Bind an Econet socket.
183 static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
185 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
186 struct sock *sk=sock->sk;
187 struct econet_sock *eo = ec_sk(sk);
193 if (addr_len < sizeof(struct sockaddr_ec) ||
194 sec->sec_family != AF_ECONET)
198 eo->port = sec->port;
199 eo->station = sec->addr.station;
200 eo->net = sec->addr.net;
205 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
207 * Queue a transmit result for the user to be told about.
210 static void tx_result(struct sock *sk, unsigned long cookie, int result)
212 struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
214 struct sockaddr_ec *sec;
218 printk(KERN_DEBUG "ec: memory squeeze, transmit result dropped.\n");
222 eb = (struct ec_cb *)&skb->cb;
223 sec = (struct sockaddr_ec *)&eb->sec;
224 memset(sec, 0, sizeof(struct sockaddr_ec));
225 sec->cookie = cookie;
226 sec->type = ECTYPE_TRANSMIT_STATUS | result;
227 sec->sec_family = AF_ECONET;
229 if (sock_queue_rcv_skb(sk, skb) < 0)
234 #ifdef CONFIG_ECONET_NATIVE
236 * Called by the Econet hardware driver when a packet transmit
237 * has completed. Tell the user.
240 static void ec_tx_done(struct sk_buff *skb, int result)
242 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
243 tx_result(skb->sk, eb->cookie, result);
248 * Send a packet. We have to work out which device it's going out on
249 * and hence whether to use real Econet or the UDP emulation.
252 static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
253 struct msghdr *msg, size_t len)
255 struct sock *sk = sock->sk;
256 struct sockaddr_ec *saddr=(struct sockaddr_ec *)msg->msg_name;
257 struct net_device *dev;
260 unsigned char port, cb;
261 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
265 #ifdef CONFIG_ECONET_AUNUDP
266 struct msghdr udpmsg;
267 struct iovec iov[msg->msg_iovlen+1];
269 struct sockaddr_in udpdest;
270 __kernel_size_t size;
279 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
283 * Get and verify the address.
287 struct econet_sock *eo = ec_sk(sk);
289 addr.station = eo->station;
294 if (msg->msg_namelen < sizeof(struct sockaddr_ec))
296 addr.station = saddr->addr.station;
297 addr.net = saddr->addr.net;
302 /* Look for a device with the right network number. */
303 dev = net2dev_map[addr.net];
305 /* If not directly reachable, use some default */
308 dev = net2dev_map[0];
309 /* No interfaces at all? */
314 if (len + 15 > dev->mtu)
317 if (dev->type == ARPHRD_ECONET)
319 /* Real hardware Econet. We're not worthy etc. */
320 #ifdef CONFIG_ECONET_NATIVE
321 unsigned short proto = 0;
325 skb = sock_alloc_send_skb(sk, len+LL_RESERVED_SPACE(dev),
326 msg->msg_flags & MSG_DONTWAIT, &err);
330 skb_reserve(skb, LL_RESERVED_SPACE(dev));
331 skb->nh.raw = skb->data;
333 eb = (struct ec_cb *)&skb->cb;
335 /* BUG: saddr may be NULL */
336 eb->cookie = saddr->cookie;
338 eb->sent = ec_tx_done;
340 if (dev->hard_header) {
342 struct ec_framehdr *fh;
344 res = dev->hard_header(skb, dev, ntohs(proto),
346 /* Poke in our control byte and
347 port number. Hack, hack. */
348 fh = (struct ec_framehdr *)(skb->data);
351 if (sock->type != SOCK_DGRAM) {
352 skb->tail = skb->data;
358 /* Copy the data. Returns -EFAULT on error */
359 err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
360 skb->protocol = proto;
362 skb->priority = sk->sk_priority;
367 if (!(dev->flags & IFF_UP))
389 #ifdef CONFIG_ECONET_AUNUDP
390 /* AUN virtual Econet. */
393 return -ENETDOWN; /* No socket - can't send */
395 /* Make up a UDP datagram and hand it off to some higher intellect. */
397 memset(&udpdest, 0, sizeof(udpdest));
398 udpdest.sin_family = AF_INET;
399 udpdest.sin_port = htons(AUN_PORT);
401 /* At the moment we use the stupid Acorn scheme of Econet address
402 y.x maps to IP a.b.c.x. This should be replaced with something
403 more flexible and more aware of subnet masks. */
405 struct in_device *idev;
406 unsigned long network = 0;
409 idev = __in_dev_get(dev);
412 network = ntohl(idev->ifa_list->ifa_address) &
413 0xffffff00; /* !!! */
416 udpdest.sin_addr.s_addr = htonl(network | addr.station);
421 ah.code = 2; /* magic */
424 /* tack our header on the front of the iovec */
425 size = sizeof(struct aunhdr);
427 * XXX: that is b0rken. We can't mix userland and kernel pointers
428 * in iovec, since on a lot of platforms copy_from_user() will
429 * *not* work with the kernel and userland ones at the same time,
430 * regardless of what we do with set_fs(). And we are talking about
431 * econet-over-ethernet here, so "it's only ARM anyway" doesn't
432 * apply. Any suggestions on fixing that code? -- AV
434 iov[0].iov_base = (void *)&ah;
435 iov[0].iov_len = size;
436 for (i = 0; i < msg->msg_iovlen; i++) {
437 void __user *base = msg->msg_iov[i].iov_base;
438 size_t len = msg->msg_iov[i].iov_len;
439 /* Check it now since we switch to KERNEL_DS later. */
440 if (!access_ok(VERIFY_READ, base, len))
442 iov[i+1].iov_base = base;
443 iov[i+1].iov_len = len;
447 /* Get a skbuff (no data, just holds our cb information) */
448 if ((skb = sock_alloc_send_skb(sk, 0,
449 msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
452 eb = (struct ec_cb *)&skb->cb;
454 eb->cookie = saddr->cookie;
455 eb->timeout = (5*HZ);
458 eb->seq = (aun_seq++);
461 skb_queue_tail(&aun_queue, skb);
463 udpmsg.msg_name = (void *)&udpdest;
464 udpmsg.msg_namelen = sizeof(udpdest);
465 udpmsg.msg_iov = &iov[0];
466 udpmsg.msg_iovlen = msg->msg_iovlen + 1;
467 udpmsg.msg_control = NULL;
468 udpmsg.msg_controllen = 0;
471 oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */
472 err = sock_sendmsg(udpsock, &udpmsg, size);
481 * Look up the address of a socket.
484 static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
485 int *uaddr_len, int peer)
487 struct sock *sk = sock->sk;
488 struct econet_sock *eo = ec_sk(sk);
489 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
494 sec->sec_family = AF_ECONET;
495 sec->port = eo->port;
496 sec->addr.station = eo->station;
497 sec->addr.net = eo->net;
499 *uaddr_len = sizeof(*sec);
503 static void econet_destroy_timer(unsigned long data)
505 struct sock *sk=(struct sock *)data;
507 if (!atomic_read(&sk->sk_wmem_alloc) &&
508 !atomic_read(&sk->sk_rmem_alloc)) {
513 sk->sk_timer.expires = jiffies + 10 * HZ;
514 add_timer(&sk->sk_timer);
515 printk(KERN_DEBUG "econet socket destroy delayed\n");
519 * Close an econet socket.
522 static int econet_release(struct socket *sock)
524 struct sock *sk = sock->sk;
529 econet_remove_socket(&econet_sklist, sk);
532 * Now the socket is dead. No more input will appear.
535 sk->sk_state_change(sk); /* It is useless. Just for sanity. */
538 sk->sk_socket = NULL;
539 sock_set_flag(sk, SOCK_DEAD);
543 skb_queue_purge(&sk->sk_receive_queue);
545 if (atomic_read(&sk->sk_rmem_alloc) ||
546 atomic_read(&sk->sk_wmem_alloc)) {
547 sk->sk_timer.data = (unsigned long)sk;
548 sk->sk_timer.expires = jiffies + HZ;
549 sk->sk_timer.function = econet_destroy_timer;
550 add_timer(&sk->sk_timer);
558 static struct proto econet_proto = {
560 .owner = THIS_MODULE,
561 .obj_size = sizeof(struct econet_sock),
565 * Create an Econet socket
568 static int econet_create(struct socket *sock, int protocol)
571 struct econet_sock *eo;
574 /* Econet only provides datagram services. */
575 if (sock->type != SOCK_DGRAM)
576 return -ESOCKTNOSUPPORT;
578 sock->state = SS_UNCONNECTED;
581 sk = sk_alloc(PF_ECONET, GFP_KERNEL, &econet_proto, 1);
586 sock->ops = &econet_ops;
587 sock_init_data(sock, sk);
590 sock_reset_flag(sk, SOCK_ZAPPED);
591 sk->sk_family = PF_ECONET;
594 econet_insert_socket(&econet_sklist, sk);
601 * Handle Econet specific ioctls
604 static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
607 struct ec_device *edev;
608 struct net_device *dev;
609 struct sockaddr_ec *sec;
612 * Fetch the caller's info block into kernel space
615 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
618 if ((dev = dev_get_by_name(ifr.ifr_name)) == NULL)
621 sec = (struct sockaddr_ec *)&ifr.ifr_addr;
629 /* Magic up a new one. */
630 edev = kmalloc(sizeof(struct ec_device), GFP_KERNEL);
632 printk("af_ec: memory squeeze.\n");
636 memset(edev, 0, sizeof(struct ec_device));
640 net2dev_map[edev->net] = NULL;
641 edev->station = sec->addr.station;
642 edev->net = sec->addr.net;
643 net2dev_map[sec->addr.net] = dev;
645 net2dev_map[0] = dev;
656 memset(sec, 0, sizeof(struct sockaddr_ec));
657 sec->addr.station = edev->station;
658 sec->addr.net = edev->net;
659 sec->sec_family = AF_ECONET;
661 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
671 * Handle generic ioctls
674 static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
676 struct sock *sk = sock->sk;
677 void __user *argp = (void __user *)arg;
681 return sock_get_timestamp(sk, argp);
685 return ec_dev_ioctl(sock, cmd, argp);
689 return dev_ioctl(cmd, argp);
695 static struct net_proto_family econet_family_ops = {
697 .create = econet_create,
698 .owner = THIS_MODULE,
701 static struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
703 .owner = THIS_MODULE,
704 .release = econet_release,
706 .connect = sock_no_connect,
707 .socketpair = sock_no_socketpair,
708 .accept = sock_no_accept,
709 .getname = econet_getname,
710 .poll = datagram_poll,
711 .ioctl = econet_ioctl,
712 .listen = sock_no_listen,
713 .shutdown = sock_no_shutdown,
714 .setsockopt = sock_no_setsockopt,
715 .getsockopt = sock_no_getsockopt,
716 .sendmsg = econet_sendmsg,
717 .recvmsg = econet_recvmsg,
718 .mmap = sock_no_mmap,
719 .sendpage = sock_no_sendpage,
722 #include <linux/smp_lock.h>
723 SOCKOPS_WRAP(econet, PF_ECONET);
725 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
727 * Find the listening socket, if any, for the given data.
730 static struct sock *ec_listening_socket(unsigned char port, unsigned char
731 station, unsigned char net)
734 struct hlist_node *node;
736 sk_for_each(sk, node, &econet_sklist) {
737 struct econet_sock *opt = ec_sk(sk);
738 if ((opt->port == port || opt->port == 0) &&
739 (opt->station == station || opt->station == 0) &&
740 (opt->net == net || opt->net == 0))
749 * Queue a received packet for a socket.
752 static int ec_queue_packet(struct sock *sk, struct sk_buff *skb,
753 unsigned char stn, unsigned char net,
754 unsigned char cb, unsigned char port)
756 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
757 struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec;
759 memset(sec, 0, sizeof(struct sockaddr_ec));
760 sec->sec_family = AF_ECONET;
761 sec->type = ECTYPE_PACKET_RECEIVED;
765 sec->addr.station = stn;
767 return sock_queue_rcv_skb(sk, skb);
771 #ifdef CONFIG_ECONET_AUNUDP
773 * Send an AUN protocol response.
776 static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb)
778 struct sockaddr_in sin = {
779 .sin_family = AF_INET,
780 .sin_port = htons(AUN_PORT),
781 .sin_addr = {.s_addr = addr}
783 struct aunhdr ah = {.code = code, .cb = cb, .handle = seq};
784 struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)};
785 struct msghdr udpmsg;
787 udpmsg.msg_name = (void *)&sin;
788 udpmsg.msg_namelen = sizeof(sin);
789 udpmsg.msg_control = NULL;
790 udpmsg.msg_controllen = 0;
793 kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah));
798 * Handle incoming AUN packets. Work out if anybody wants them,
799 * and send positive or negative acknowledgements as appropriate.
802 static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
804 struct iphdr *ip = skb->nh.iph;
805 unsigned char stn = ntohl(ip->saddr) & 0xff;
807 struct sk_buff *newskb;
808 struct ec_device *edev = skb->dev->ec_ptr;
813 if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL)
814 goto bad; /* Nobody wants it */
816 newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15,
820 printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n");
821 /* Send nack and hope sender tries again */
825 memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1),
826 len - sizeof(struct aunhdr));
828 if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port))
830 /* Socket is bankrupt. */
835 aun_send_response(ip->saddr, ah->handle, 3, 0);
839 aun_send_response(ip->saddr, ah->handle, 4, 0);
843 * Handle incoming AUN transmit acknowledgements. If the sequence
844 * number matches something in our backlog then kill it and tell
845 * the user. If the remote took too long to reply then we may have
846 * dropped the packet already.
849 static void aun_tx_ack(unsigned long seq, int result)
855 spin_lock_irqsave(&aun_queue_lock, flags);
856 skb = skb_peek(&aun_queue);
857 while (skb && skb != (struct sk_buff *)&aun_queue)
859 struct sk_buff *newskb = skb->next;
860 eb = (struct ec_cb *)&skb->cb;
866 spin_unlock_irqrestore(&aun_queue_lock, flags);
867 printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq);
871 tx_result(skb->sk, eb->cookie, result);
872 skb_unlink(skb, &aun_queue);
873 spin_unlock_irqrestore(&aun_queue_lock, flags);
878 * Deal with received AUN frames - sort out what type of thing it is
879 * and hand it to the right function.
882 static void aun_data_available(struct sock *sk, int slen)
891 while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) {
892 if (err == -EAGAIN) {
893 printk(KERN_ERR "AUN: no data available?!");
896 printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err);
899 data = skb->h.raw + sizeof(struct udphdr);
900 ah = (struct aunhdr *)data;
901 len = skb->len - sizeof(struct udphdr);
907 aun_incoming(skb, ah, len);
910 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK);
913 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING);
916 /* This isn't quite right yet. */
918 aun_send_response(ip->saddr, ah->handle, 6, ah->cb);
922 printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]);
925 skb_free_datagram(sk, skb);
929 * Called by the timer to manage the AUN transmit queue. If a packet
930 * was sent to a dead or nonexistent host then we will never get an
931 * acknowledgement back. After a few seconds we need to spot this and
935 static void ab_cleanup(unsigned long h)
940 spin_lock_irqsave(&aun_queue_lock, flags);
941 skb = skb_peek(&aun_queue);
942 while (skb && skb != (struct sk_buff *)&aun_queue)
944 struct sk_buff *newskb = skb->next;
945 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
946 if ((jiffies - eb->start) > eb->timeout)
948 tx_result(skb->sk, eb->cookie,
949 ECTYPE_TRANSMIT_NOT_PRESENT);
950 skb_unlink(skb, &aun_queue);
955 spin_unlock_irqrestore(&aun_queue_lock, flags);
957 mod_timer(&ab_cleanup_timer, jiffies + (HZ*2));
960 static int __init aun_udp_initialise(void)
963 struct sockaddr_in sin;
965 skb_queue_head_init(&aun_queue);
966 spin_lock_init(&aun_queue_lock);
967 init_timer(&ab_cleanup_timer);
968 ab_cleanup_timer.expires = jiffies + (HZ*2);
969 ab_cleanup_timer.function = ab_cleanup;
970 add_timer(&ab_cleanup_timer);
972 memset(&sin, 0, sizeof(sin));
973 sin.sin_port = htons(AUN_PORT);
975 /* We can count ourselves lucky Acorn machines are too dim to
977 if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0)
979 printk("AUN: socket error %d\n", -error);
983 udpsock->sk->sk_reuse = 1;
984 udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it
987 error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin,
991 printk("AUN: bind error %d\n", -error);
995 udpsock->sk->sk_data_ready = aun_data_available;
1000 sock_release(udpsock);
1006 #ifdef CONFIG_ECONET_NATIVE
1009 * Receive an Econet frame from a device.
1012 static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1014 struct ec_framehdr *hdr;
1016 struct ec_device *edev = dev->ec_ptr;
1018 if (skb->pkt_type == PACKET_OTHERHOST)
1024 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1027 if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
1030 hdr = (struct ec_framehdr *) skb->data;
1032 /* First check for encapsulated IP */
1033 if (hdr->port == EC_PORT_IP) {
1034 skb->protocol = htons(ETH_P_IP);
1035 skb_pull(skb, sizeof(struct ec_framehdr));
1040 sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
1044 if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb,
1055 static struct packet_type econet_packet_type = {
1056 .type = __constant_htons(ETH_P_ECONET),
1060 static void econet_hw_initialise(void)
1062 dev_add_pack(&econet_packet_type);
1067 static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data)
1069 struct net_device *dev = (struct net_device *)data;
1070 struct ec_device *edev;
1073 case NETDEV_UNREGISTER:
1074 /* A device has gone down - kill any data we hold for it. */
1078 if (net2dev_map[0] == dev)
1079 net2dev_map[0] = NULL;
1080 net2dev_map[edev->net] = NULL;
1090 static struct notifier_block econet_netdev_notifier = {
1091 .notifier_call =econet_notifier,
1094 static void __exit econet_proto_exit(void)
1096 #ifdef CONFIG_ECONET_AUNUDP
1097 del_timer(&ab_cleanup_timer);
1099 sock_release(udpsock);
1101 unregister_netdevice_notifier(&econet_netdev_notifier);
1102 sock_unregister(econet_family_ops.family);
1103 proto_unregister(&econet_proto);
1106 static int __init econet_proto_init(void)
1108 int err = proto_register(&econet_proto, 0);
1112 sock_register(&econet_family_ops);
1113 #ifdef CONFIG_ECONET_AUNUDP
1114 spin_lock_init(&aun_queue_lock);
1115 aun_udp_initialise();
1117 #ifdef CONFIG_ECONET_NATIVE
1118 econet_hw_initialise();
1120 register_netdevice_notifier(&econet_netdev_notifier);
1125 module_init(econet_proto_init);
1126 module_exit(econet_proto_exit);
1128 MODULE_LICENSE("GPL");
1129 MODULE_ALIAS_NETPROTO(PF_ECONET);