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>
33 #include <linux/slab.h>
34 #include <linux/vmalloc.h>
36 #include <net/inet_common.h>
37 #include <linux/stat.h>
38 #include <linux/init.h>
39 #include <linux/if_ec.h>
42 #include <linux/spinlock.h>
43 #include <linux/rcupdate.h>
44 #include <linux/bitops.h>
45 #include <linux/mutex.h>
47 #include <asm/uaccess.h>
48 #include <asm/system.h>
50 static const struct proto_ops econet_ops;
51 static struct hlist_head econet_sklist;
52 static DEFINE_SPINLOCK(econet_lock);
53 static DEFINE_MUTEX(econet_mutex);
55 /* Since there are only 256 possible network numbers (or fewer, depends
56 how you count) it makes sense to use a simple lookup table. */
57 static struct net_device *net2dev_map[256];
59 #define EC_PORT_IP 0xd2
61 #ifdef CONFIG_ECONET_AUNUDP
62 static DEFINE_SPINLOCK(aun_queue_lock);
63 static struct socket *udpsock;
64 #define AUN_PORT 0x8000
69 unsigned char code; /* AUN magic protocol byte */
76 static unsigned long aun_seq;
78 /* Queue of packets waiting to be transmitted. */
79 static struct sk_buff_head aun_queue;
80 static struct timer_list ab_cleanup_timer;
82 #endif /* CONFIG_ECONET_AUNUDP */
84 /* Per-packet information */
87 struct sockaddr_ec sec;
88 unsigned long cookie; /* Supplied by user. */
89 #ifdef CONFIG_ECONET_AUNUDP
91 unsigned long seq; /* Sequencing */
92 unsigned long timeout; /* Timeout */
93 unsigned long start; /* jiffies */
95 #ifdef CONFIG_ECONET_NATIVE
96 void (*sent)(struct sk_buff *, int result);
100 static void econet_remove_socket(struct hlist_head *list, struct sock *sk)
102 spin_lock_bh(&econet_lock);
103 sk_del_node_init(sk);
104 spin_unlock_bh(&econet_lock);
107 static void econet_insert_socket(struct hlist_head *list, struct sock *sk)
109 spin_lock_bh(&econet_lock);
110 sk_add_node(sk, list);
111 spin_unlock_bh(&econet_lock);
115 * Pull a packet from our receive queue and hand it to the user.
116 * If necessary we block.
119 static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
120 struct msghdr *msg, size_t len, int flags)
122 struct sock *sk = sock->sk;
127 msg->msg_namelen = sizeof(struct sockaddr_ec);
129 mutex_lock(&econet_mutex);
132 * Call the generic datagram receiver. This handles all sorts
133 * of horrible races and re-entrancy so we can forget about it
134 * in the protocol layers.
136 * Now it will return ENETDOWN, if device have just gone down,
137 * but then it will block.
140 skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err);
143 * An error occurred so return it. Because skb_recv_datagram()
144 * handles the blocking we don't see and worry about blocking
152 * You lose any data beyond the buffer you gave. If it worries a
153 * user program they can ask the device for its MTU anyway.
160 msg->msg_flags|=MSG_TRUNC;
163 /* We can't use skb_copy_datagram here */
164 err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
167 sk->sk_stamp = skb->tstamp;
170 memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
173 * Free or return the buffer as appropriate. Again this
174 * hides all the races and re-entrancy issues from us.
179 skb_free_datagram(sk, skb);
181 mutex_unlock(&econet_mutex);
186 * Bind an Econet socket.
189 static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
191 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
193 struct econet_sock *eo;
199 if (addr_len < sizeof(struct sockaddr_ec) ||
200 sec->sec_family != AF_ECONET)
203 mutex_lock(&econet_mutex);
209 eo->port = sec->port;
210 eo->station = sec->addr.station;
211 eo->net = sec->addr.net;
213 mutex_unlock(&econet_mutex);
218 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
220 * Queue a transmit result for the user to be told about.
223 static void tx_result(struct sock *sk, unsigned long cookie, int result)
225 struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
227 struct sockaddr_ec *sec;
231 printk(KERN_DEBUG "ec: memory squeeze, transmit result dropped.\n");
235 eb = (struct ec_cb *)&skb->cb;
236 sec = (struct sockaddr_ec *)&eb->sec;
237 memset(sec, 0, sizeof(struct sockaddr_ec));
238 sec->cookie = cookie;
239 sec->type = ECTYPE_TRANSMIT_STATUS | result;
240 sec->sec_family = AF_ECONET;
242 if (sock_queue_rcv_skb(sk, skb) < 0)
247 #ifdef CONFIG_ECONET_NATIVE
249 * Called by the Econet hardware driver when a packet transmit
250 * has completed. Tell the user.
253 static void ec_tx_done(struct sk_buff *skb, int result)
255 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
256 tx_result(skb->sk, eb->cookie, result);
261 * Send a packet. We have to work out which device it's going out on
262 * and hence whether to use real Econet or the UDP emulation.
265 static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
266 struct msghdr *msg, size_t len)
268 struct sockaddr_ec *saddr=(struct sockaddr_ec *)msg->msg_name;
269 struct net_device *dev;
272 unsigned char port, cb;
273 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
274 struct sock *sk = sock->sk;
278 #ifdef CONFIG_ECONET_AUNUDP
279 struct msghdr udpmsg;
282 struct sockaddr_in udpdest;
283 __kernel_size_t size;
292 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
296 * Get and verify the address.
299 mutex_lock(&econet_mutex);
301 if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) {
302 mutex_unlock(&econet_mutex);
305 addr.station = saddr->addr.station;
306 addr.net = saddr->addr.net;
310 /* Look for a device with the right network number. */
311 dev = net2dev_map[addr.net];
313 /* If not directly reachable, use some default */
315 dev = net2dev_map[0];
316 /* No interfaces at all? */
318 mutex_unlock(&econet_mutex);
323 if (dev->type == ARPHRD_ECONET) {
324 /* Real hardware Econet. We're not worthy etc. */
325 #ifdef CONFIG_ECONET_NATIVE
326 unsigned short proto = 0;
329 if (len + 15 > dev->mtu) {
330 mutex_unlock(&econet_mutex);
336 skb = sock_alloc_send_skb(sk, len+LL_ALLOCATED_SPACE(dev),
337 msg->msg_flags & MSG_DONTWAIT, &err);
341 skb_reserve(skb, LL_RESERVED_SPACE(dev));
342 skb_reset_network_header(skb);
344 eb = (struct ec_cb *)&skb->cb;
346 eb->cookie = saddr->cookie;
348 eb->sent = ec_tx_done;
351 res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len);
355 struct ec_framehdr *fh;
356 /* Poke in our control byte and
357 port number. Hack, hack. */
358 fh = (struct ec_framehdr *)(skb->data);
361 if (sock->type != SOCK_DGRAM) {
362 skb_reset_tail_pointer(skb);
367 /* Copy the data. Returns -EFAULT on error */
368 err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
369 skb->protocol = proto;
371 skb->priority = sk->sk_priority;
376 if (!(dev->flags & IFF_UP))
385 mutex_unlock(&econet_mutex);
396 mutex_unlock(&econet_mutex);
401 #ifdef CONFIG_ECONET_AUNUDP
402 /* AUN virtual Econet. */
404 if (udpsock == NULL) {
405 mutex_unlock(&econet_mutex);
406 return -ENETDOWN; /* No socket - can't send */
414 /* Make up a UDP datagram and hand it off to some higher intellect. */
416 memset(&udpdest, 0, sizeof(udpdest));
417 udpdest.sin_family = AF_INET;
418 udpdest.sin_port = htons(AUN_PORT);
420 /* At the moment we use the stupid Acorn scheme of Econet address
421 y.x maps to IP a.b.c.x. This should be replaced with something
422 more flexible and more aware of subnet masks. */
424 struct in_device *idev;
425 unsigned long network = 0;
428 idev = __in_dev_get_rcu(dev);
431 network = ntohl(idev->ifa_list->ifa_address) &
432 0xffffff00; /* !!! */
435 udpdest.sin_addr.s_addr = htonl(network | addr.station);
438 memset(&ah, 0, sizeof(ah));
441 ah.code = 2; /* magic */
443 /* tack our header on the front of the iovec */
444 size = sizeof(struct aunhdr);
445 iov[0].iov_base = (void *)&ah;
446 iov[0].iov_len = size;
448 userbuf = vmalloc(len);
449 if (userbuf == NULL) {
454 iov[1].iov_base = userbuf;
455 iov[1].iov_len = len;
456 err = memcpy_fromiovec(userbuf, msg->msg_iov, len);
460 /* Get a skbuff (no data, just holds our cb information) */
461 if ((skb = sock_alloc_send_skb(sk, 0,
462 msg->msg_flags & MSG_DONTWAIT,
466 eb = (struct ec_cb *)&skb->cb;
468 eb->cookie = saddr->cookie;
469 eb->timeout = (5*HZ);
472 eb->seq = (aun_seq++);
475 skb_queue_tail(&aun_queue, skb);
477 udpmsg.msg_name = (void *)&udpdest;
478 udpmsg.msg_namelen = sizeof(udpdest);
479 udpmsg.msg_iov = &iov[0];
480 udpmsg.msg_iovlen = 2;
481 udpmsg.msg_control = NULL;
482 udpmsg.msg_controllen = 0;
485 oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */
486 err = sock_sendmsg(udpsock, &udpmsg, size);
495 mutex_unlock(&econet_mutex);
501 * Look up the address of a socket.
504 static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
505 int *uaddr_len, int peer)
508 struct econet_sock *eo;
509 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
514 memset(sec, 0, sizeof(*sec));
515 mutex_lock(&econet_mutex);
520 sec->sec_family = AF_ECONET;
521 sec->port = eo->port;
522 sec->addr.station = eo->station;
523 sec->addr.net = eo->net;
525 mutex_unlock(&econet_mutex);
527 *uaddr_len = sizeof(*sec);
531 static void econet_destroy_timer(unsigned long data)
533 struct sock *sk=(struct sock *)data;
535 if (!sk_has_allocations(sk)) {
540 sk->sk_timer.expires = jiffies + 10 * HZ;
541 add_timer(&sk->sk_timer);
542 printk(KERN_DEBUG "econet socket destroy delayed\n");
546 * Close an econet socket.
549 static int econet_release(struct socket *sock)
553 mutex_lock(&econet_mutex);
559 econet_remove_socket(&econet_sklist, sk);
562 * Now the socket is dead. No more input will appear.
565 sk->sk_state_change(sk); /* It is useless. Just for sanity. */
571 skb_queue_purge(&sk->sk_receive_queue);
573 if (sk_has_allocations(sk)) {
574 sk->sk_timer.data = (unsigned long)sk;
575 sk->sk_timer.expires = jiffies + HZ;
576 sk->sk_timer.function = econet_destroy_timer;
577 add_timer(&sk->sk_timer);
585 mutex_unlock(&econet_mutex);
589 static struct proto econet_proto = {
591 .owner = THIS_MODULE,
592 .obj_size = sizeof(struct econet_sock),
596 * Create an Econet socket
599 static int econet_create(struct net *net, struct socket *sock, int protocol,
603 struct econet_sock *eo;
606 if (!net_eq(net, &init_net))
607 return -EAFNOSUPPORT;
609 /* Econet only provides datagram services. */
610 if (sock->type != SOCK_DGRAM)
611 return -ESOCKTNOSUPPORT;
613 sock->state = SS_UNCONNECTED;
616 sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto);
621 sock->ops = &econet_ops;
622 sock_init_data(sock, sk);
625 sock_reset_flag(sk, SOCK_ZAPPED);
626 sk->sk_family = PF_ECONET;
629 econet_insert_socket(&econet_sklist, sk);
636 * Handle Econet specific ioctls
639 static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
642 struct ec_device *edev;
643 struct net_device *dev;
644 struct sockaddr_ec *sec;
648 * Fetch the caller's info block into kernel space
651 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
654 if ((dev = dev_get_by_name(&init_net, ifr.ifr_name)) == NULL)
657 sec = (struct sockaddr_ec *)&ifr.ifr_addr;
659 mutex_lock(&econet_mutex);
664 if (!capable(CAP_NET_ADMIN)) {
671 /* Magic up a new one. */
672 edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL);
679 net2dev_map[edev->net] = NULL;
680 edev->station = sec->addr.station;
681 edev->net = sec->addr.net;
682 net2dev_map[sec->addr.net] = dev;
684 net2dev_map[0] = dev;
693 memset(sec, 0, sizeof(struct sockaddr_ec));
694 sec->addr.station = edev->station;
695 sec->addr.net = edev->net;
696 sec->sec_family = AF_ECONET;
698 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
707 mutex_unlock(&econet_mutex);
715 * Handle generic ioctls
718 static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
720 struct sock *sk = sock->sk;
721 void __user *argp = (void __user *)arg;
725 return sock_get_timestamp(sk, argp);
728 return sock_get_timestampns(sk, argp);
732 return ec_dev_ioctl(sock, cmd, argp);
739 static const struct net_proto_family econet_family_ops = {
741 .create = econet_create,
742 .owner = THIS_MODULE,
745 static const struct proto_ops econet_ops = {
747 .owner = THIS_MODULE,
748 .release = econet_release,
750 .connect = sock_no_connect,
751 .socketpair = sock_no_socketpair,
752 .accept = sock_no_accept,
753 .getname = econet_getname,
754 .poll = datagram_poll,
755 .ioctl = econet_ioctl,
756 .listen = sock_no_listen,
757 .shutdown = sock_no_shutdown,
758 .setsockopt = sock_no_setsockopt,
759 .getsockopt = sock_no_getsockopt,
760 .sendmsg = econet_sendmsg,
761 .recvmsg = econet_recvmsg,
762 .mmap = sock_no_mmap,
763 .sendpage = sock_no_sendpage,
766 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
768 * Find the listening socket, if any, for the given data.
771 static struct sock *ec_listening_socket(unsigned char port, unsigned char
772 station, unsigned char net)
775 struct hlist_node *node;
777 spin_lock(&econet_lock);
778 sk_for_each(sk, node, &econet_sklist) {
779 struct econet_sock *opt = ec_sk(sk);
780 if ((opt->port == port || opt->port == 0) &&
781 (opt->station == station || opt->station == 0) &&
782 (opt->net == net || opt->net == 0)) {
789 spin_unlock(&econet_lock);
794 * Queue a received packet for a socket.
797 static int ec_queue_packet(struct sock *sk, struct sk_buff *skb,
798 unsigned char stn, unsigned char net,
799 unsigned char cb, unsigned char port)
801 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
802 struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec;
804 memset(sec, 0, sizeof(struct sockaddr_ec));
805 sec->sec_family = AF_ECONET;
806 sec->type = ECTYPE_PACKET_RECEIVED;
810 sec->addr.station = stn;
812 return sock_queue_rcv_skb(sk, skb);
816 #ifdef CONFIG_ECONET_AUNUDP
818 * Send an AUN protocol response.
821 static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb)
823 struct sockaddr_in sin = {
824 .sin_family = AF_INET,
825 .sin_port = htons(AUN_PORT),
826 .sin_addr = {.s_addr = addr}
828 struct aunhdr ah = {.code = code, .cb = cb, .handle = seq};
829 struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)};
830 struct msghdr udpmsg;
832 udpmsg.msg_name = (void *)&sin;
833 udpmsg.msg_namelen = sizeof(sin);
834 udpmsg.msg_control = NULL;
835 udpmsg.msg_controllen = 0;
838 kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah));
843 * Handle incoming AUN packets. Work out if anybody wants them,
844 * and send positive or negative acknowledgements as appropriate.
847 static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
849 struct iphdr *ip = ip_hdr(skb);
850 unsigned char stn = ntohl(ip->saddr) & 0xff;
851 struct dst_entry *dst = skb_dst(skb);
852 struct ec_device *edev = NULL;
853 struct sock *sk = NULL;
854 struct sk_buff *newskb;
857 edev = dst->dev->ec_ptr;
862 if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL)
863 goto bad; /* Nobody wants it */
865 newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15,
869 printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n");
870 /* Send nack and hope sender tries again */
874 memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1),
875 len - sizeof(struct aunhdr));
877 if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port))
879 /* Socket is bankrupt. */
884 aun_send_response(ip->saddr, ah->handle, 3, 0);
889 aun_send_response(ip->saddr, ah->handle, 4, 0);
895 * Handle incoming AUN transmit acknowledgements. If the sequence
896 * number matches something in our backlog then kill it and tell
897 * the user. If the remote took too long to reply then we may have
898 * dropped the packet already.
901 static void aun_tx_ack(unsigned long seq, int result)
907 spin_lock_irqsave(&aun_queue_lock, flags);
908 skb_queue_walk(&aun_queue, skb) {
909 eb = (struct ec_cb *)&skb->cb;
913 spin_unlock_irqrestore(&aun_queue_lock, flags);
914 printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq);
918 tx_result(skb->sk, eb->cookie, result);
919 skb_unlink(skb, &aun_queue);
920 spin_unlock_irqrestore(&aun_queue_lock, flags);
925 * Deal with received AUN frames - sort out what type of thing it is
926 * and hand it to the right function.
929 static void aun_data_available(struct sock *sk, int slen)
937 while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) {
938 if (err == -EAGAIN) {
939 printk(KERN_ERR "AUN: no data available?!");
942 printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err);
945 data = skb_transport_header(skb) + sizeof(struct udphdr);
946 ah = (struct aunhdr *)data;
947 len = skb->len - sizeof(struct udphdr);
952 aun_incoming(skb, ah, len);
955 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK);
958 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING);
961 printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]);
964 skb_free_datagram(sk, skb);
968 * Called by the timer to manage the AUN transmit queue. If a packet
969 * was sent to a dead or nonexistent host then we will never get an
970 * acknowledgement back. After a few seconds we need to spot this and
974 static void ab_cleanup(unsigned long h)
976 struct sk_buff *skb, *n;
979 spin_lock_irqsave(&aun_queue_lock, flags);
980 skb_queue_walk_safe(&aun_queue, skb, n) {
981 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
982 if ((jiffies - eb->start) > eb->timeout) {
983 tx_result(skb->sk, eb->cookie,
984 ECTYPE_TRANSMIT_NOT_PRESENT);
985 skb_unlink(skb, &aun_queue);
989 spin_unlock_irqrestore(&aun_queue_lock, flags);
991 mod_timer(&ab_cleanup_timer, jiffies + (HZ*2));
994 static int __init aun_udp_initialise(void)
997 struct sockaddr_in sin;
999 skb_queue_head_init(&aun_queue);
1000 setup_timer(&ab_cleanup_timer, ab_cleanup, 0);
1001 ab_cleanup_timer.expires = jiffies + (HZ*2);
1002 add_timer(&ab_cleanup_timer);
1004 memset(&sin, 0, sizeof(sin));
1005 sin.sin_port = htons(AUN_PORT);
1007 /* We can count ourselves lucky Acorn machines are too dim to
1009 if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0)
1011 printk("AUN: socket error %d\n", -error);
1015 udpsock->sk->sk_reuse = 1;
1016 udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it
1019 error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin,
1023 printk("AUN: bind error %d\n", -error);
1027 udpsock->sk->sk_data_ready = aun_data_available;
1032 sock_release(udpsock);
1038 #ifdef CONFIG_ECONET_NATIVE
1041 * Receive an Econet frame from a device.
1044 static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1046 struct ec_framehdr *hdr;
1047 struct sock *sk = NULL;
1048 struct ec_device *edev = dev->ec_ptr;
1050 if (!net_eq(dev_net(dev), &init_net))
1053 if (skb->pkt_type == PACKET_OTHERHOST)
1059 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1062 if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
1065 hdr = (struct ec_framehdr *) skb->data;
1067 /* First check for encapsulated IP */
1068 if (hdr->port == EC_PORT_IP) {
1069 skb->protocol = htons(ETH_P_IP);
1070 skb_pull(skb, sizeof(struct ec_framehdr));
1072 return NET_RX_SUCCESS;
1075 sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
1079 if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb,
1083 return NET_RX_SUCCESS;
1092 static struct packet_type econet_packet_type __read_mostly = {
1093 .type = cpu_to_be16(ETH_P_ECONET),
1097 static void econet_hw_initialise(void)
1099 dev_add_pack(&econet_packet_type);
1104 static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data)
1106 struct net_device *dev = (struct net_device *)data;
1107 struct ec_device *edev;
1109 if (!net_eq(dev_net(dev), &init_net))
1113 case NETDEV_UNREGISTER:
1114 /* A device has gone down - kill any data we hold for it. */
1118 if (net2dev_map[0] == dev)
1119 net2dev_map[0] = NULL;
1120 net2dev_map[edev->net] = NULL;
1130 static struct notifier_block econet_netdev_notifier = {
1131 .notifier_call =econet_notifier,
1134 static void __exit econet_proto_exit(void)
1136 #ifdef CONFIG_ECONET_AUNUDP
1137 del_timer(&ab_cleanup_timer);
1139 sock_release(udpsock);
1141 unregister_netdevice_notifier(&econet_netdev_notifier);
1142 #ifdef CONFIG_ECONET_NATIVE
1143 dev_remove_pack(&econet_packet_type);
1145 sock_unregister(econet_family_ops.family);
1146 proto_unregister(&econet_proto);
1149 static int __init econet_proto_init(void)
1151 int err = proto_register(&econet_proto, 0);
1155 sock_register(&econet_family_ops);
1156 #ifdef CONFIG_ECONET_AUNUDP
1157 aun_udp_initialise();
1159 #ifdef CONFIG_ECONET_NATIVE
1160 econet_hw_initialise();
1162 register_netdevice_notifier(&econet_netdev_notifier);
1167 module_init(econet_proto_init);
1168 module_exit(econet_proto_exit);
1170 MODULE_LICENSE("GPL");
1171 MODULE_ALIAS_NETPROTO(PF_ECONET);