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);
300 struct econet_sock *eo = ec_sk(sk);
302 addr.station = eo->station;
307 if (msg->msg_namelen < sizeof(struct sockaddr_ec)) {
308 mutex_unlock(&econet_mutex);
311 addr.station = saddr->addr.station;
312 addr.net = saddr->addr.net;
317 /* Look for a device with the right network number. */
318 dev = net2dev_map[addr.net];
320 /* If not directly reachable, use some default */
322 dev = net2dev_map[0];
323 /* No interfaces at all? */
325 mutex_unlock(&econet_mutex);
330 if (len + 15 > dev->mtu) {
331 mutex_unlock(&econet_mutex);
335 if (dev->type == ARPHRD_ECONET) {
336 /* Real hardware Econet. We're not worthy etc. */
337 #ifdef CONFIG_ECONET_NATIVE
338 unsigned short proto = 0;
342 skb = sock_alloc_send_skb(sk, len+LL_RESERVED_SPACE(dev),
343 msg->msg_flags & MSG_DONTWAIT, &err);
347 skb_reserve(skb, LL_RESERVED_SPACE(dev));
348 skb_reset_network_header(skb);
350 eb = (struct ec_cb *)&skb->cb;
352 /* BUG: saddr may be NULL */
353 eb->cookie = saddr->cookie;
355 eb->sent = ec_tx_done;
357 if (dev->hard_header) {
359 struct ec_framehdr *fh;
361 res = dev->hard_header(skb, dev, ntohs(proto),
363 /* Poke in our control byte and
364 port number. Hack, hack. */
365 fh = (struct ec_framehdr *)(skb->data);
368 if (sock->type != SOCK_DGRAM) {
369 skb_reset_tail_pointer(skb);
375 /* Copy the data. Returns -EFAULT on error */
376 err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
377 skb->protocol = proto;
379 skb->priority = sk->sk_priority;
384 if (!(dev->flags & IFF_UP))
393 mutex_unlock(&econet_mutex);
404 mutex_unlock(&econet_mutex);
409 #ifdef CONFIG_ECONET_AUNUDP
410 /* AUN virtual Econet. */
412 if (udpsock == NULL) {
413 mutex_unlock(&econet_mutex);
414 return -ENETDOWN; /* No socket - can't send */
417 /* Make up a UDP datagram and hand it off to some higher intellect. */
419 memset(&udpdest, 0, sizeof(udpdest));
420 udpdest.sin_family = AF_INET;
421 udpdest.sin_port = htons(AUN_PORT);
423 /* At the moment we use the stupid Acorn scheme of Econet address
424 y.x maps to IP a.b.c.x. This should be replaced with something
425 more flexible and more aware of subnet masks. */
427 struct in_device *idev;
428 unsigned long network = 0;
431 idev = __in_dev_get_rcu(dev);
434 network = ntohl(idev->ifa_list->ifa_address) &
435 0xffffff00; /* !!! */
438 udpdest.sin_addr.s_addr = htonl(network | addr.station);
443 ah.code = 2; /* magic */
446 /* tack our header on the front of the iovec */
447 size = sizeof(struct aunhdr);
449 * XXX: that is b0rken. We can't mix userland and kernel pointers
450 * in iovec, since on a lot of platforms copy_from_user() will
451 * *not* work with the kernel and userland ones at the same time,
452 * regardless of what we do with set_fs(). And we are talking about
453 * econet-over-ethernet here, so "it's only ARM anyway" doesn't
454 * apply. Any suggestions on fixing that code? -- AV
456 iov[0].iov_base = (void *)&ah;
457 iov[0].iov_len = size;
458 for (i = 0; i < msg->msg_iovlen; i++) {
459 void __user *base = msg->msg_iov[i].iov_base;
460 size_t len = msg->msg_iov[i].iov_len;
461 /* Check it now since we switch to KERNEL_DS later. */
462 if (!access_ok(VERIFY_READ, base, len)) {
463 mutex_unlock(&econet_mutex);
466 iov[i+1].iov_base = base;
467 iov[i+1].iov_len = len;
471 /* Get a skbuff (no data, just holds our cb information) */
472 if ((skb = sock_alloc_send_skb(sk, 0,
473 msg->msg_flags & MSG_DONTWAIT,
475 mutex_unlock(&econet_mutex);
479 eb = (struct ec_cb *)&skb->cb;
481 eb->cookie = saddr->cookie;
482 eb->timeout = (5*HZ);
485 eb->seq = (aun_seq++);
488 skb_queue_tail(&aun_queue, skb);
490 udpmsg.msg_name = (void *)&udpdest;
491 udpmsg.msg_namelen = sizeof(udpdest);
492 udpmsg.msg_iov = &iov[0];
493 udpmsg.msg_iovlen = msg->msg_iovlen + 1;
494 udpmsg.msg_control = NULL;
495 udpmsg.msg_controllen = 0;
498 oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */
499 err = sock_sendmsg(udpsock, &udpmsg, size);
504 mutex_unlock(&econet_mutex);
510 * Look up the address of a socket.
513 static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
514 int *uaddr_len, int peer)
517 struct econet_sock *eo;
518 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
523 mutex_lock(&econet_mutex);
528 sec->sec_family = AF_ECONET;
529 sec->port = eo->port;
530 sec->addr.station = eo->station;
531 sec->addr.net = eo->net;
533 mutex_unlock(&econet_mutex);
535 *uaddr_len = sizeof(*sec);
539 static void econet_destroy_timer(unsigned long data)
541 struct sock *sk=(struct sock *)data;
543 if (!atomic_read(&sk->sk_wmem_alloc) &&
544 !atomic_read(&sk->sk_rmem_alloc)) {
549 sk->sk_timer.expires = jiffies + 10 * HZ;
550 add_timer(&sk->sk_timer);
551 printk(KERN_DEBUG "econet socket destroy delayed\n");
555 * Close an econet socket.
558 static int econet_release(struct socket *sock)
562 mutex_lock(&econet_mutex);
568 econet_remove_socket(&econet_sklist, sk);
571 * Now the socket is dead. No more input will appear.
574 sk->sk_state_change(sk); /* It is useless. Just for sanity. */
577 sk->sk_socket = NULL;
578 sock_set_flag(sk, SOCK_DEAD);
582 skb_queue_purge(&sk->sk_receive_queue);
584 if (atomic_read(&sk->sk_rmem_alloc) ||
585 atomic_read(&sk->sk_wmem_alloc)) {
586 sk->sk_timer.data = (unsigned long)sk;
587 sk->sk_timer.expires = jiffies + HZ;
588 sk->sk_timer.function = econet_destroy_timer;
589 add_timer(&sk->sk_timer);
597 mutex_unlock(&econet_mutex);
601 static struct proto econet_proto = {
603 .owner = THIS_MODULE,
604 .obj_size = sizeof(struct econet_sock),
608 * Create an Econet socket
611 static int econet_create(struct net *net, struct socket *sock, int protocol)
614 struct econet_sock *eo;
617 if (net != &init_net)
618 return -EAFNOSUPPORT;
620 /* Econet only provides datagram services. */
621 if (sock->type != SOCK_DGRAM)
622 return -ESOCKTNOSUPPORT;
624 sock->state = SS_UNCONNECTED;
627 sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto, 1);
632 sock->ops = &econet_ops;
633 sock_init_data(sock, sk);
636 sock_reset_flag(sk, SOCK_ZAPPED);
637 sk->sk_family = PF_ECONET;
640 econet_insert_socket(&econet_sklist, sk);
647 * Handle Econet specific ioctls
650 static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
653 struct ec_device *edev;
654 struct net_device *dev;
655 struct sockaddr_ec *sec;
659 * Fetch the caller's info block into kernel space
662 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
665 if ((dev = dev_get_by_name(&init_net, ifr.ifr_name)) == NULL)
668 sec = (struct sockaddr_ec *)&ifr.ifr_addr;
670 mutex_lock(&econet_mutex);
677 /* Magic up a new one. */
678 edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL);
685 net2dev_map[edev->net] = NULL;
686 edev->station = sec->addr.station;
687 edev->net = sec->addr.net;
688 net2dev_map[sec->addr.net] = dev;
690 net2dev_map[0] = dev;
699 memset(sec, 0, sizeof(struct sockaddr_ec));
700 sec->addr.station = edev->station;
701 sec->addr.net = edev->net;
702 sec->sec_family = AF_ECONET;
704 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
713 mutex_unlock(&econet_mutex);
721 * Handle generic ioctls
724 static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
726 struct sock *sk = sock->sk;
727 void __user *argp = (void __user *)arg;
731 return sock_get_timestamp(sk, argp);
734 return sock_get_timestampns(sk, argp);
738 return ec_dev_ioctl(sock, cmd, argp);
748 static struct net_proto_family econet_family_ops = {
750 .create = econet_create,
751 .owner = THIS_MODULE,
754 static const struct proto_ops econet_ops = {
756 .owner = THIS_MODULE,
757 .release = econet_release,
759 .connect = sock_no_connect,
760 .socketpair = sock_no_socketpair,
761 .accept = sock_no_accept,
762 .getname = econet_getname,
763 .poll = datagram_poll,
764 .ioctl = econet_ioctl,
765 .listen = sock_no_listen,
766 .shutdown = sock_no_shutdown,
767 .setsockopt = sock_no_setsockopt,
768 .getsockopt = sock_no_getsockopt,
769 .sendmsg = econet_sendmsg,
770 .recvmsg = econet_recvmsg,
771 .mmap = sock_no_mmap,
772 .sendpage = sock_no_sendpage,
775 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
777 * Find the listening socket, if any, for the given data.
780 static struct sock *ec_listening_socket(unsigned char port, unsigned char
781 station, unsigned char net)
784 struct hlist_node *node;
786 sk_for_each(sk, node, &econet_sklist) {
787 struct econet_sock *opt = ec_sk(sk);
788 if ((opt->port == port || opt->port == 0) &&
789 (opt->station == station || opt->station == 0) &&
790 (opt->net == net || opt->net == 0))
799 * Queue a received packet for a socket.
802 static int ec_queue_packet(struct sock *sk, struct sk_buff *skb,
803 unsigned char stn, unsigned char net,
804 unsigned char cb, unsigned char port)
806 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
807 struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec;
809 memset(sec, 0, sizeof(struct sockaddr_ec));
810 sec->sec_family = AF_ECONET;
811 sec->type = ECTYPE_PACKET_RECEIVED;
815 sec->addr.station = stn;
817 return sock_queue_rcv_skb(sk, skb);
821 #ifdef CONFIG_ECONET_AUNUDP
823 * Send an AUN protocol response.
826 static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb)
828 struct sockaddr_in sin = {
829 .sin_family = AF_INET,
830 .sin_port = htons(AUN_PORT),
831 .sin_addr = {.s_addr = addr}
833 struct aunhdr ah = {.code = code, .cb = cb, .handle = seq};
834 struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)};
835 struct msghdr udpmsg;
837 udpmsg.msg_name = (void *)&sin;
838 udpmsg.msg_namelen = sizeof(sin);
839 udpmsg.msg_control = NULL;
840 udpmsg.msg_controllen = 0;
843 kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah));
848 * Handle incoming AUN packets. Work out if anybody wants them,
849 * and send positive or negative acknowledgements as appropriate.
852 static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
854 struct iphdr *ip = ip_hdr(skb);
855 unsigned char stn = ntohl(ip->saddr) & 0xff;
857 struct sk_buff *newskb;
858 struct ec_device *edev = skb->dev->ec_ptr;
863 if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL)
864 goto bad; /* Nobody wants it */
866 newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15,
870 printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n");
871 /* Send nack and hope sender tries again */
875 memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1),
876 len - sizeof(struct aunhdr));
878 if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port))
880 /* Socket is bankrupt. */
885 aun_send_response(ip->saddr, ah->handle, 3, 0);
889 aun_send_response(ip->saddr, ah->handle, 4, 0);
893 * Handle incoming AUN transmit acknowledgements. If the sequence
894 * number matches something in our backlog then kill it and tell
895 * the user. If the remote took too long to reply then we may have
896 * dropped the packet already.
899 static void aun_tx_ack(unsigned long seq, int result)
905 spin_lock_irqsave(&aun_queue_lock, flags);
906 skb = skb_peek(&aun_queue);
907 while (skb && skb != (struct sk_buff *)&aun_queue)
909 struct sk_buff *newskb = skb->next;
910 eb = (struct ec_cb *)&skb->cb;
916 spin_unlock_irqrestore(&aun_queue_lock, flags);
917 printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq);
921 tx_result(skb->sk, eb->cookie, result);
922 skb_unlink(skb, &aun_queue);
923 spin_unlock_irqrestore(&aun_queue_lock, flags);
928 * Deal with received AUN frames - sort out what type of thing it is
929 * and hand it to the right function.
932 static void aun_data_available(struct sock *sk, int slen)
941 while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) {
942 if (err == -EAGAIN) {
943 printk(KERN_ERR "AUN: no data available?!");
946 printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err);
949 data = skb_transport_header(skb) + sizeof(struct udphdr);
950 ah = (struct aunhdr *)data;
951 len = skb->len - sizeof(struct udphdr);
957 aun_incoming(skb, ah, len);
960 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK);
963 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING);
966 /* This isn't quite right yet. */
968 aun_send_response(ip->saddr, ah->handle, 6, ah->cb);
972 printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]);
975 skb_free_datagram(sk, skb);
979 * Called by the timer to manage the AUN transmit queue. If a packet
980 * was sent to a dead or nonexistent host then we will never get an
981 * acknowledgement back. After a few seconds we need to spot this and
985 static void ab_cleanup(unsigned long h)
990 spin_lock_irqsave(&aun_queue_lock, flags);
991 skb = skb_peek(&aun_queue);
992 while (skb && skb != (struct sk_buff *)&aun_queue)
994 struct sk_buff *newskb = skb->next;
995 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
996 if ((jiffies - eb->start) > eb->timeout)
998 tx_result(skb->sk, eb->cookie,
999 ECTYPE_TRANSMIT_NOT_PRESENT);
1000 skb_unlink(skb, &aun_queue);
1005 spin_unlock_irqrestore(&aun_queue_lock, flags);
1007 mod_timer(&ab_cleanup_timer, jiffies + (HZ*2));
1010 static int __init aun_udp_initialise(void)
1013 struct sockaddr_in sin;
1015 skb_queue_head_init(&aun_queue);
1016 spin_lock_init(&aun_queue_lock);
1017 init_timer(&ab_cleanup_timer);
1018 ab_cleanup_timer.expires = jiffies + (HZ*2);
1019 ab_cleanup_timer.function = ab_cleanup;
1020 add_timer(&ab_cleanup_timer);
1022 memset(&sin, 0, sizeof(sin));
1023 sin.sin_port = htons(AUN_PORT);
1025 /* We can count ourselves lucky Acorn machines are too dim to
1027 if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0)
1029 printk("AUN: socket error %d\n", -error);
1033 udpsock->sk->sk_reuse = 1;
1034 udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it
1037 error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin,
1041 printk("AUN: bind error %d\n", -error);
1045 udpsock->sk->sk_data_ready = aun_data_available;
1050 sock_release(udpsock);
1056 #ifdef CONFIG_ECONET_NATIVE
1059 * Receive an Econet frame from a device.
1062 static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1064 struct ec_framehdr *hdr;
1066 struct ec_device *edev = dev->ec_ptr;
1068 if (dev->nd_net != &init_net)
1071 if (skb->pkt_type == PACKET_OTHERHOST)
1077 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1080 if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
1083 hdr = (struct ec_framehdr *) skb->data;
1085 /* First check for encapsulated IP */
1086 if (hdr->port == EC_PORT_IP) {
1087 skb->protocol = htons(ETH_P_IP);
1088 skb_pull(skb, sizeof(struct ec_framehdr));
1093 sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
1097 if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb,
1108 static struct packet_type econet_packet_type = {
1109 .type = __constant_htons(ETH_P_ECONET),
1113 static void econet_hw_initialise(void)
1115 dev_add_pack(&econet_packet_type);
1120 static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data)
1122 struct net_device *dev = (struct net_device *)data;
1123 struct ec_device *edev;
1125 if (dev->nd_net != &init_net)
1129 case NETDEV_UNREGISTER:
1130 /* A device has gone down - kill any data we hold for it. */
1134 if (net2dev_map[0] == dev)
1135 net2dev_map[0] = NULL;
1136 net2dev_map[edev->net] = NULL;
1146 static struct notifier_block econet_netdev_notifier = {
1147 .notifier_call =econet_notifier,
1150 static void __exit econet_proto_exit(void)
1152 #ifdef CONFIG_ECONET_AUNUDP
1153 del_timer(&ab_cleanup_timer);
1155 sock_release(udpsock);
1157 unregister_netdevice_notifier(&econet_netdev_notifier);
1158 #ifdef CONFIG_ECONET_NATIVE
1159 dev_remove_pack(&econet_packet_type);
1161 sock_unregister(econet_family_ops.family);
1162 proto_unregister(&econet_proto);
1165 static int __init econet_proto_init(void)
1167 int err = proto_register(&econet_proto, 0);
1171 sock_register(&econet_family_ops);
1172 #ifdef CONFIG_ECONET_AUNUDP
1173 spin_lock_init(&aun_queue_lock);
1174 aun_udp_initialise();
1176 #ifdef CONFIG_ECONET_NATIVE
1177 econet_hw_initialise();
1179 register_netdevice_notifier(&econet_netdev_notifier);
1184 module_init(econet_proto_init);
1185 module_exit(econet_proto_exit);
1187 MODULE_LICENSE("GPL");
1188 MODULE_ALIAS_NETPROTO(PF_ECONET);