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-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/if_ec.h68
-rw-r--r--net/Kconfig1
-rw-r--r--net/Makefile1
-rw-r--r--net/econet/Kconfig36
-rw-r--r--net/econet/Makefile7
-rw-r--r--net/econet/af_econet.c1172
7 files changed, 0 insertions, 1286 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index b738f2dc38d9..b5d568fa19e8 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -167,7 +167,6 @@ header-y += if_arp.h
167header-y += if_bonding.h 167header-y += if_bonding.h
168header-y += if_bridge.h 168header-y += if_bridge.h
169header-y += if_cablemodem.h 169header-y += if_cablemodem.h
170header-y += if_ec.h
171header-y += if_eql.h 170header-y += if_eql.h
172header-y += if_ether.h 171header-y += if_ether.h
173header-y += if_fc.h 172header-y += if_fc.h
diff --git a/include/linux/if_ec.h b/include/linux/if_ec.h
deleted file mode 100644
index d85f9f48129f..000000000000
--- a/include/linux/if_ec.h
+++ /dev/null
@@ -1,68 +0,0 @@
1/* Definitions for Econet sockets. */
2
3#ifndef __LINUX_IF_EC
4#define __LINUX_IF_EC
5
6/* User visible stuff. Glibc provides its own but libc5 folk will use these */
7
8struct ec_addr {
9 unsigned char station; /* Station number. */
10 unsigned char net; /* Network number. */
11};
12
13struct sockaddr_ec {
14 unsigned short sec_family;
15 unsigned char port; /* Port number. */
16 unsigned char cb; /* Control/flag byte. */
17 unsigned char type; /* Type of message. */
18 struct ec_addr addr;
19 unsigned long cookie;
20};
21
22#define ECTYPE_PACKET_RECEIVED 0 /* Packet received */
23#define ECTYPE_TRANSMIT_STATUS 0x10 /* Transmit completed,
24 low nibble holds status */
25
26#define ECTYPE_TRANSMIT_OK 1
27#define ECTYPE_TRANSMIT_NOT_LISTENING 2
28#define ECTYPE_TRANSMIT_NET_ERROR 3
29#define ECTYPE_TRANSMIT_NO_CLOCK 4
30#define ECTYPE_TRANSMIT_LINE_JAMMED 5
31#define ECTYPE_TRANSMIT_NOT_PRESENT 6
32
33#ifdef __KERNEL__
34
35#define EC_HLEN 6
36
37/* This is what an Econet frame looks like on the wire. */
38struct ec_framehdr {
39 unsigned char dst_stn;
40 unsigned char dst_net;
41 unsigned char src_stn;
42 unsigned char src_net;
43 unsigned char cb;
44 unsigned char port;
45};
46
47struct econet_sock {
48 /* struct sock has to be the first member of econet_sock */
49 struct sock sk;
50 unsigned char cb;
51 unsigned char port;
52 unsigned char station;
53 unsigned char net;
54 unsigned short num;
55};
56
57static inline struct econet_sock *ec_sk(const struct sock *sk)
58{
59 return (struct econet_sock *)sk;
60}
61
62struct ec_device {
63 unsigned char station, net; /* Econet protocol address */
64};
65
66#endif
67
68#endif
diff --git a/net/Kconfig b/net/Kconfig
index da1282359303..1e47bd03dde3 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -207,7 +207,6 @@ source "net/ipx/Kconfig"
207source "drivers/net/appletalk/Kconfig" 207source "drivers/net/appletalk/Kconfig"
208source "net/x25/Kconfig" 208source "net/x25/Kconfig"
209source "net/lapb/Kconfig" 209source "net/lapb/Kconfig"
210source "net/econet/Kconfig"
211source "net/wanrouter/Kconfig" 210source "net/wanrouter/Kconfig"
212source "net/phonet/Kconfig" 211source "net/phonet/Kconfig"
213source "net/ieee802154/Kconfig" 212source "net/ieee802154/Kconfig"
diff --git a/net/Makefile b/net/Makefile
index 2a97cded8601..4f4ee083064c 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -40,7 +40,6 @@ obj-$(CONFIG_AF_RXRPC) += rxrpc/
40obj-$(CONFIG_ATM) += atm/ 40obj-$(CONFIG_ATM) += atm/
41obj-$(CONFIG_L2TP) += l2tp/ 41obj-$(CONFIG_L2TP) += l2tp/
42obj-$(CONFIG_DECNET) += decnet/ 42obj-$(CONFIG_DECNET) += decnet/
43obj-$(CONFIG_ECONET) += econet/
44obj-$(CONFIG_PHONET) += phonet/ 43obj-$(CONFIG_PHONET) += phonet/
45ifneq ($(CONFIG_VLAN_8021Q),) 44ifneq ($(CONFIG_VLAN_8021Q),)
46obj-y += 8021q/ 45obj-y += 8021q/
diff --git a/net/econet/Kconfig b/net/econet/Kconfig
deleted file mode 100644
index 39a2d2975e0e..000000000000
--- a/net/econet/Kconfig
+++ /dev/null
@@ -1,36 +0,0 @@
1#
2# Acorn Econet/AUN protocols
3#
4
5config ECONET
6 tristate "Acorn Econet/AUN protocols (EXPERIMENTAL)"
7 depends on EXPERIMENTAL && INET
8 ---help---
9 Econet is a fairly old and slow networking protocol mainly used by
10 Acorn computers to access file and print servers. It uses native
11 Econet network cards. AUN is an implementation of the higher level
12 parts of Econet that runs over ordinary Ethernet connections, on
13 top of the UDP packet protocol, which in turn runs on top of the
14 Internet protocol IP.
15
16 If you say Y here, you can choose with the next two options whether
17 to send Econet/AUN traffic over a UDP Ethernet connection or over
18 a native Econet network card.
19
20 To compile this driver as a module, choose M here: the module
21 will be called econet.
22
23config ECONET_AUNUDP
24 bool "AUN over UDP"
25 depends on ECONET
26 help
27 Say Y here if you want to send Econet/AUN traffic over a UDP
28 connection (UDP is a packet based protocol that runs on top of the
29 Internet protocol IP) using an ordinary Ethernet network card.
30
31config ECONET_NATIVE
32 bool "Native Econet"
33 depends on ECONET
34 help
35 Say Y here if you have a native Econet network card installed in
36 your computer.
diff --git a/net/econet/Makefile b/net/econet/Makefile
deleted file mode 100644
index 05fae8be2fed..000000000000
--- a/net/econet/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
1#
2# Makefile for Econet support code.
3#
4
5obj-$(CONFIG_ECONET) += econet.o
6
7econet-y := af_econet.o
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
deleted file mode 100644
index fa14ca76b77b..000000000000
--- a/net/econet/af_econet.c
+++ /dev/null
@@ -1,1172 +0,0 @@
1/*
2 * An implementation of the Acorn Econet and AUN protocols.
3 * Philip Blundell <philb@gnu.org>
4 *
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.
9 *
10 */
11
12#define pr_fmt(fmt) fmt
13
14#include <linux/module.h>
15
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/string.h>
19#include <linux/mm.h>
20#include <linux/socket.h>
21#include <linux/sockios.h>
22#include <linux/in.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>
34#include <linux/udp.h>
35#include <linux/slab.h>
36#include <linux/vmalloc.h>
37#include <net/sock.h>
38#include <net/inet_common.h>
39#include <linux/stat.h>
40#include <linux/init.h>
41#include <linux/if_ec.h>
42#include <net/udp.h>
43#include <net/ip.h>
44#include <linux/spinlock.h>
45#include <linux/rcupdate.h>
46#include <linux/bitops.h>
47#include <linux/mutex.h>
48
49#include <linux/uaccess.h>
50
51static const struct proto_ops econet_ops;
52static struct hlist_head econet_sklist;
53static DEFINE_SPINLOCK(econet_lock);
54static DEFINE_MUTEX(econet_mutex);
55
56/* Since there are only 256 possible network numbers (or fewer, depends
57 how you count) it makes sense to use a simple lookup table. */
58static struct net_device *net2dev_map[256];
59
60#define EC_PORT_IP 0xd2
61
62#ifdef CONFIG_ECONET_AUNUDP
63static DEFINE_SPINLOCK(aun_queue_lock);
64static struct socket *udpsock;
65#define AUN_PORT 0x8000
66
67struct aunhdr {
68 unsigned char code; /* AUN magic protocol byte */
69 unsigned char port;
70 unsigned char cb;
71 unsigned char pad;
72 unsigned long handle;
73};
74
75static unsigned long aun_seq;
76
77/* Queue of packets waiting to be transmitted. */
78static struct sk_buff_head aun_queue;
79static struct timer_list ab_cleanup_timer;
80
81#endif /* CONFIG_ECONET_AUNUDP */
82
83/* Per-packet information */
84struct ec_cb {
85 struct sockaddr_ec sec;
86 unsigned long cookie; /* Supplied by user. */
87#ifdef CONFIG_ECONET_AUNUDP
88 int done;
89 unsigned long seq; /* Sequencing */
90 unsigned long timeout; /* Timeout */
91 unsigned long start; /* jiffies */
92#endif
93#ifdef CONFIG_ECONET_NATIVE
94 void (*sent)(struct sk_buff *, int result);
95#endif
96};
97
98static void econet_remove_socket(struct hlist_head *list, struct sock *sk)
99{
100 spin_lock_bh(&econet_lock);
101 sk_del_node_init(sk);
102 spin_unlock_bh(&econet_lock);
103}
104
105static void econet_insert_socket(struct hlist_head *list, struct sock *sk)
106{
107 spin_lock_bh(&econet_lock);
108 sk_add_node(sk, list);
109 spin_unlock_bh(&econet_lock);
110}
111
112/*
113 * Pull a packet from our receive queue and hand it to the user.
114 * If necessary we block.
115 */
116
117static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
118 struct msghdr *msg, size_t len, int flags)
119{
120 struct sock *sk = sock->sk;
121 struct sk_buff *skb;
122 size_t copied;
123 int err;
124
125 msg->msg_namelen = sizeof(struct sockaddr_ec);
126
127 mutex_lock(&econet_mutex);
128
129 /*
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.
133 *
134 * Now it will return ENETDOWN, if device have just gone down,
135 * but then it will block.
136 */
137
138 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
139
140 /*
141 * An error occurred so return it. Because skb_recv_datagram()
142 * handles the blocking we don't see and worry about blocking
143 * retries.
144 */
145
146 if (skb == NULL)
147 goto out;
148
149 /*
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.
152 */
153
154 copied = skb->len;
155 if (copied > len) {
156 copied = len;
157 msg->msg_flags |= MSG_TRUNC;
158 }
159
160 /* We can't use skb_copy_datagram here */
161 err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
162 if (err)
163 goto out_free;
164 sk->sk_stamp = skb->tstamp;
165
166 if (msg->msg_name)
167 memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
168
169 /*
170 * Free or return the buffer as appropriate. Again this
171 * hides all the races and re-entrancy issues from us.
172 */
173 err = copied;
174
175out_free:
176 skb_free_datagram(sk, skb);
177out:
178 mutex_unlock(&econet_mutex);
179 return err;
180}
181
182/*
183 * Bind an Econet socket.
184 */
185
186static int econet_bind(struct socket *sock, struct sockaddr *uaddr,
187 int addr_len)
188{
189 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
190 struct sock *sk;
191 struct econet_sock *eo;
192
193 /*
194 * Check legality
195 */
196
197 if (addr_len < sizeof(struct sockaddr_ec) ||
198 sec->sec_family != AF_ECONET)
199 return -EINVAL;
200
201 mutex_lock(&econet_mutex);
202
203 sk = sock->sk;
204 eo = ec_sk(sk);
205
206 eo->cb = sec->cb;
207 eo->port = sec->port;
208 eo->station = sec->addr.station;
209 eo->net = sec->addr.net;
210
211 mutex_unlock(&econet_mutex);
212
213 return 0;
214}
215
216#if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
217/*
218 * Queue a transmit result for the user to be told about.
219 */
220
221static void tx_result(struct sock *sk, unsigned long cookie, int result)
222{
223 struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
224 struct ec_cb *eb;
225 struct sockaddr_ec *sec;
226
227 if (skb == NULL) {
228 pr_debug("econet: memory squeeze, transmit result dropped\n");
229 return;
230 }
231
232 eb = (struct ec_cb *)&skb->cb;
233 sec = (struct sockaddr_ec *)&eb->sec;
234 memset(sec, 0, sizeof(struct sockaddr_ec));
235 sec->cookie = cookie;
236 sec->type = ECTYPE_TRANSMIT_STATUS | result;
237 sec->sec_family = AF_ECONET;
238
239 if (sock_queue_rcv_skb(sk, skb) < 0)
240 kfree_skb(skb);
241}
242#endif
243
244#ifdef CONFIG_ECONET_NATIVE
245/*
246 * Called by the Econet hardware driver when a packet transmit
247 * has completed. Tell the user.
248 */
249
250static void ec_tx_done(struct sk_buff *skb, int result)
251{
252 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
253 tx_result(skb->sk, eb->cookie, result);
254}
255#endif
256
257/*
258 * Send a packet. We have to work out which device it's going out on
259 * and hence whether to use real Econet or the UDP emulation.
260 */
261
262static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
263 struct msghdr *msg, size_t len)
264{
265 struct sockaddr_ec *saddr = (struct sockaddr_ec *)msg->msg_name;
266 struct net_device *dev;
267 struct ec_addr addr;
268 int err;
269 unsigned char port, cb;
270#if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
271 struct sock *sk = sock->sk;
272 struct sk_buff *skb;
273 struct ec_cb *eb;
274#endif
275#ifdef CONFIG_ECONET_AUNUDP
276 struct msghdr udpmsg;
277 struct iovec iov[2];
278 struct aunhdr ah;
279 struct sockaddr_in udpdest;
280 __kernel_size_t size;
281 mm_segment_t oldfs;
282 char *userbuf;
283#endif
284
285 /*
286 * Check the flags.
287 */
288
289 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
290 return -EINVAL;
291
292 /*
293 * Get and verify the address.
294 */
295
296 mutex_lock(&econet_mutex);
297
298 if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) {
299 mutex_unlock(&econet_mutex);
300 return -EINVAL;
301 }
302 addr.station = saddr->addr.station;
303 addr.net = saddr->addr.net;
304 port = saddr->port;
305 cb = saddr->cb;
306
307 /* Look for a device with the right network number. */
308 dev = net2dev_map[addr.net];
309
310 /* If not directly reachable, use some default */
311 if (dev == NULL) {
312 dev = net2dev_map[0];
313 /* No interfaces at all? */
314 if (dev == NULL) {
315 mutex_unlock(&econet_mutex);
316 return -ENETDOWN;
317 }
318 }
319
320 if (dev->type == ARPHRD_ECONET) {
321 /* Real hardware Econet. We're not worthy etc. */
322#ifdef CONFIG_ECONET_NATIVE
323 unsigned short proto = 0;
324 int hlen, tlen;
325 int res;
326
327 if (len + 15 > dev->mtu) {
328 mutex_unlock(&econet_mutex);
329 return -EMSGSIZE;
330 }
331
332 dev_hold(dev);
333
334 hlen = LL_RESERVED_SPACE(dev);
335 tlen = dev->needed_tailroom;
336 skb = sock_alloc_send_skb(sk, len + hlen + tlen,
337 msg->msg_flags & MSG_DONTWAIT, &err);
338 if (skb == NULL)
339 goto out_unlock;
340
341 skb_reserve(skb, hlen);
342 skb_reset_network_header(skb);
343
344 eb = (struct ec_cb *)&skb->cb;
345
346 eb->cookie = saddr->cookie;
347 eb->sec = *saddr;
348 eb->sent = ec_tx_done;
349
350 err = -EINVAL;
351 res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len);
352 if (res < 0)
353 goto out_free;
354 if (res > 0) {
355 struct ec_framehdr *fh;
356 /* Poke in our control byte and
357 port number. Hack, hack. */
358 fh = (struct ec_framehdr *)skb->data;
359 fh->cb = cb;
360 fh->port = port;
361 if (sock->type != SOCK_DGRAM) {
362 skb_reset_tail_pointer(skb);
363 skb->len = 0;
364 }
365 }
366
367 /* Copy the data. Returns -EFAULT on error */
368 err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
369 skb->protocol = proto;
370 skb->dev = dev;
371 skb->priority = sk->sk_priority;
372 if (err)
373 goto out_free;
374
375 err = -ENETDOWN;
376 if (!(dev->flags & IFF_UP))
377 goto out_free;
378
379 /*
380 * Now send it
381 */
382
383 dev_queue_xmit(skb);
384 dev_put(dev);
385 mutex_unlock(&econet_mutex);
386 return len;
387
388out_free:
389 kfree_skb(skb);
390out_unlock:
391 if (dev)
392 dev_put(dev);
393#else
394 err = -EPROTOTYPE;
395#endif
396 mutex_unlock(&econet_mutex);
397
398 return err;
399 }
400
401#ifdef CONFIG_ECONET_AUNUDP
402 /* AUN virtual Econet. */
403
404 if (udpsock == NULL) {
405 mutex_unlock(&econet_mutex);
406 return -ENETDOWN; /* No socket - can't send */
407 }
408
409 if (len > 32768) {
410 err = -E2BIG;
411 goto error;
412 }
413
414 /* Make up a UDP datagram and hand it off to some higher intellect. */
415
416 memset(&udpdest, 0, sizeof(udpdest));
417 udpdest.sin_family = AF_INET;
418 udpdest.sin_port = htons(AUN_PORT);
419
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. */
423 {
424 struct in_device *idev;
425 unsigned long network = 0;
426
427 rcu_read_lock();
428 idev = __in_dev_get_rcu(dev);
429 if (idev) {
430 if (idev->ifa_list)
431 network = ntohl(idev->ifa_list->ifa_address) &
432 0xffffff00; /* !!! */
433 }
434 rcu_read_unlock();
435 udpdest.sin_addr.s_addr = htonl(network | addr.station);
436 }
437
438 memset(&ah, 0, sizeof(ah));
439 ah.port = port;
440 ah.cb = cb & 0x7f;
441 ah.code = 2; /* magic */
442
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;
447
448 userbuf = vmalloc(len);
449 if (userbuf == NULL) {
450 err = -ENOMEM;
451 goto error;
452 }
453
454 iov[1].iov_base = userbuf;
455 iov[1].iov_len = len;
456 err = memcpy_fromiovec(userbuf, msg->msg_iov, len);
457 if (err)
458 goto error_free_buf;
459
460 /* Get a skbuff (no data, just holds our cb information) */
461 skb = sock_alloc_send_skb(sk, 0, msg->msg_flags & MSG_DONTWAIT, &err);
462 if (skb == NULL)
463 goto error_free_buf;
464
465 eb = (struct ec_cb *)&skb->cb;
466
467 eb->cookie = saddr->cookie;
468 eb->timeout = 5 * HZ;
469 eb->start = jiffies;
470 ah.handle = aun_seq;
471 eb->seq = (aun_seq++);
472 eb->sec = *saddr;
473
474 skb_queue_tail(&aun_queue, skb);
475
476 udpmsg.msg_name = (void *)&udpdest;
477 udpmsg.msg_namelen = sizeof(udpdest);
478 udpmsg.msg_iov = &iov[0];
479 udpmsg.msg_iovlen = 2;
480 udpmsg.msg_control = NULL;
481 udpmsg.msg_controllen = 0;
482 udpmsg.msg_flags = 0;
483
484 oldfs = get_fs();
485 set_fs(KERNEL_DS); /* More privs :-) */
486 err = sock_sendmsg(udpsock, &udpmsg, size);
487 set_fs(oldfs);
488
489error_free_buf:
490 vfree(userbuf);
491error:
492#else
493 err = -EPROTOTYPE;
494#endif
495 mutex_unlock(&econet_mutex);
496
497 return err;
498}
499
500/*
501 * Look up the address of a socket.
502 */
503
504static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
505 int *uaddr_len, int peer)
506{
507 struct sock *sk;
508 struct econet_sock *eo;
509 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
510
511 if (peer)
512 return -EOPNOTSUPP;
513
514 memset(sec, 0, sizeof(*sec));
515 mutex_lock(&econet_mutex);
516
517 sk = sock->sk;
518 eo = ec_sk(sk);
519
520 sec->sec_family = AF_ECONET;
521 sec->port = eo->port;
522 sec->addr.station = eo->station;
523 sec->addr.net = eo->net;
524
525 mutex_unlock(&econet_mutex);
526
527 *uaddr_len = sizeof(*sec);
528 return 0;
529}
530
531static void econet_destroy_timer(unsigned long data)
532{
533 struct sock *sk = (struct sock *)data;
534
535 if (!sk_has_allocations(sk)) {
536 sk_free(sk);
537 return;
538 }
539
540 sk->sk_timer.expires = jiffies + 10 * HZ;
541 add_timer(&sk->sk_timer);
542 pr_debug("econet: socket destroy delayed\n");
543}
544
545/*
546 * Close an econet socket.
547 */
548
549static int econet_release(struct socket *sock)
550{
551 struct sock *sk;
552
553 mutex_lock(&econet_mutex);
554
555 sk = sock->sk;
556 if (!sk)
557 goto out_unlock;
558
559 econet_remove_socket(&econet_sklist, sk);
560
561 /*
562 * Now the socket is dead. No more input will appear.
563 */
564
565 sk->sk_state_change(sk); /* It is useless. Just for sanity. */
566
567 sock_orphan(sk);
568
569 /* Purge queues */
570
571 skb_queue_purge(&sk->sk_receive_queue);
572
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);
578
579 goto out_unlock;
580 }
581
582 sk_free(sk);
583
584out_unlock:
585 mutex_unlock(&econet_mutex);
586 return 0;
587}
588
589static struct proto econet_proto = {
590 .name = "ECONET",
591 .owner = THIS_MODULE,
592 .obj_size = sizeof(struct econet_sock),
593};
594
595/*
596 * Create an Econet socket
597 */
598
599static int econet_create(struct net *net, struct socket *sock, int protocol,
600 int kern)
601{
602 struct sock *sk;
603 struct econet_sock *eo;
604 int err;
605
606 if (!net_eq(net, &init_net))
607 return -EAFNOSUPPORT;
608
609 /* Econet only provides datagram services. */
610 if (sock->type != SOCK_DGRAM)
611 return -ESOCKTNOSUPPORT;
612
613 sock->state = SS_UNCONNECTED;
614
615 err = -ENOBUFS;
616 sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto);
617 if (sk == NULL)
618 goto out;
619
620 sk->sk_reuse = SK_CAN_REUSE;
621 sock->ops = &econet_ops;
622 sock_init_data(sock, sk);
623
624 eo = ec_sk(sk);
625 sock_reset_flag(sk, SOCK_ZAPPED);
626 sk->sk_family = PF_ECONET;
627 eo->num = protocol;
628
629 econet_insert_socket(&econet_sklist, sk);
630 return 0;
631out:
632 return err;
633}
634
635/*
636 * Handle Econet specific ioctls
637 */
638
639static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
640{
641 struct ifreq ifr;
642 struct ec_device *edev;
643 struct net_device *dev;
644 struct sockaddr_ec *sec;
645 int err;
646
647 /*
648 * Fetch the caller's info block into kernel space
649 */
650
651 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
652 return -EFAULT;
653
654 dev = dev_get_by_name(&init_net, ifr.ifr_name);
655 if (dev == NULL)
656 return -ENODEV;
657
658 sec = (struct sockaddr_ec *)&ifr.ifr_addr;
659
660 mutex_lock(&econet_mutex);
661
662 err = 0;
663 switch (cmd) {
664 case SIOCSIFADDR:
665 if (!capable(CAP_NET_ADMIN)) {
666 err = -EPERM;
667 break;
668 }
669
670 edev = dev->ec_ptr;
671 if (edev == NULL) {
672 /* Magic up a new one. */
673 edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL);
674 if (edev == NULL) {
675 err = -ENOMEM;
676 break;
677 }
678 dev->ec_ptr = edev;
679 } else
680 net2dev_map[edev->net] = NULL;
681 edev->station = sec->addr.station;
682 edev->net = sec->addr.net;
683 net2dev_map[sec->addr.net] = dev;
684 if (!net2dev_map[0])
685 net2dev_map[0] = dev;
686 break;
687
688 case SIOCGIFADDR:
689 edev = dev->ec_ptr;
690 if (edev == NULL) {
691 err = -ENODEV;
692 break;
693 }
694 memset(sec, 0, sizeof(struct sockaddr_ec));
695 sec->addr.station = edev->station;
696 sec->addr.net = edev->net;
697 sec->sec_family = AF_ECONET;
698 dev_put(dev);
699 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
700 err = -EFAULT;
701 break;
702
703 default:
704 err = -EINVAL;
705 break;
706 }
707
708 mutex_unlock(&econet_mutex);
709
710 dev_put(dev);
711
712 return err;
713}
714
715/*
716 * Handle generic ioctls
717 */
718
719static int econet_ioctl(struct socket *sock, unsigned int cmd,
720 unsigned long arg)
721{
722 struct sock *sk = sock->sk;
723 void __user *argp = (void __user *)arg;
724
725 switch (cmd) {
726 case SIOCGSTAMP:
727 return sock_get_timestamp(sk, argp);
728
729 case SIOCGSTAMPNS:
730 return sock_get_timestampns(sk, argp);
731
732 case SIOCSIFADDR:
733 case SIOCGIFADDR:
734 return ec_dev_ioctl(sock, cmd, argp);
735
736 }
737
738 return -ENOIOCTLCMD;
739}
740
741static const struct net_proto_family econet_family_ops = {
742 .family = PF_ECONET,
743 .create = econet_create,
744 .owner = THIS_MODULE,
745};
746
747static const struct proto_ops econet_ops = {
748 .family = PF_ECONET,
749 .owner = THIS_MODULE,
750 .release = econet_release,
751 .bind = econet_bind,
752 .connect = sock_no_connect,
753 .socketpair = sock_no_socketpair,
754 .accept = sock_no_accept,
755 .getname = econet_getname,
756 .poll = datagram_poll,
757 .ioctl = econet_ioctl,
758 .listen = sock_no_listen,
759 .shutdown = sock_no_shutdown,
760 .setsockopt = sock_no_setsockopt,
761 .getsockopt = sock_no_getsockopt,
762 .sendmsg = econet_sendmsg,
763 .recvmsg = econet_recvmsg,
764 .mmap = sock_no_mmap,
765 .sendpage = sock_no_sendpage,
766};
767
768#if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
769/*
770 * Find the listening socket, if any, for the given data.
771 */
772
773static struct sock *ec_listening_socket(unsigned char port, unsigned char
774 station, unsigned char net)
775{
776 struct sock *sk;
777 struct hlist_node *node;
778
779 spin_lock(&econet_lock);
780 sk_for_each(sk, node, &econet_sklist) {
781 struct econet_sock *opt = ec_sk(sk);
782 if ((opt->port == port || opt->port == 0) &&
783 (opt->station == station || opt->station == 0) &&
784 (opt->net == net || opt->net == 0)) {
785 sock_hold(sk);
786 goto found;
787 }
788 }
789 sk = NULL;
790found:
791 spin_unlock(&econet_lock);
792 return sk;
793}
794
795/*
796 * Queue a received packet for a socket.
797 */
798
799static int ec_queue_packet(struct sock *sk, struct sk_buff *skb,
800 unsigned char stn, unsigned char net,
801 unsigned char cb, unsigned char port)
802{
803 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
804 struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec;
805
806 memset(sec, 0, sizeof(struct sockaddr_ec));
807 sec->sec_family = AF_ECONET;
808 sec->type = ECTYPE_PACKET_RECEIVED;
809 sec->port = port;
810 sec->cb = cb;
811 sec->addr.net = net;
812 sec->addr.station = stn;
813
814 return sock_queue_rcv_skb(sk, skb);
815}
816#endif
817
818#ifdef CONFIG_ECONET_AUNUDP
819/*
820 * Send an AUN protocol response.
821 */
822
823static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb)
824{
825 struct sockaddr_in sin = {
826 .sin_family = AF_INET,
827 .sin_port = htons(AUN_PORT),
828 .sin_addr = {.s_addr = addr}
829 };
830 struct aunhdr ah = {.code = code, .cb = cb, .handle = seq};
831 struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)};
832 struct msghdr udpmsg;
833
834 udpmsg.msg_name = (void *)&sin;
835 udpmsg.msg_namelen = sizeof(sin);
836 udpmsg.msg_control = NULL;
837 udpmsg.msg_controllen = 0;
838 udpmsg.msg_flags = 0;
839
840 kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah));
841}
842
843
844/*
845 * Handle incoming AUN packets. Work out if anybody wants them,
846 * and send positive or negative acknowledgements as appropriate.
847 */
848
849static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
850{
851 struct iphdr *ip = ip_hdr(skb);
852 unsigned char stn = ntohl(ip->saddr) & 0xff;
853 struct dst_entry *dst = skb_dst(skb);
854 struct ec_device *edev = NULL;
855 struct sock *sk = NULL;
856 struct sk_buff *newskb;
857
858 if (dst)
859 edev = dst->dev->ec_ptr;
860
861 if (!edev)
862 goto bad;
863
864 sk = ec_listening_socket(ah->port, stn, edev->net);
865 if (sk == NULL)
866 goto bad; /* Nobody wants it */
867
868 newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15,
869 GFP_ATOMIC);
870 if (newskb == NULL) {
871 pr_debug("AUN: memory squeeze, dropping packet\n");
872 /* Send nack and hope sender tries again */
873 goto bad;
874 }
875
876 memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah + 1),
877 len - sizeof(struct aunhdr));
878
879 if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port)) {
880 /* Socket is bankrupt. */
881 kfree_skb(newskb);
882 goto bad;
883 }
884
885 aun_send_response(ip->saddr, ah->handle, 3, 0);
886 sock_put(sk);
887 return;
888
889bad:
890 aun_send_response(ip->saddr, ah->handle, 4, 0);
891 if (sk)
892 sock_put(sk);
893}
894
895/*
896 * Handle incoming AUN transmit acknowledgements. If the sequence
897 * number matches something in our backlog then kill it and tell
898 * the user. If the remote took too long to reply then we may have
899 * dropped the packet already.
900 */
901
902static void aun_tx_ack(unsigned long seq, int result)
903{
904 struct sk_buff *skb;
905 unsigned long flags;
906 struct ec_cb *eb;
907
908 spin_lock_irqsave(&aun_queue_lock, flags);
909 skb_queue_walk(&aun_queue, skb) {
910 eb = (struct ec_cb *)&skb->cb;
911 if (eb->seq == seq)
912 goto foundit;
913 }
914 spin_unlock_irqrestore(&aun_queue_lock, flags);
915 pr_debug("AUN: unknown sequence %ld\n", seq);
916 return;
917
918foundit:
919 tx_result(skb->sk, eb->cookie, result);
920 skb_unlink(skb, &aun_queue);
921 spin_unlock_irqrestore(&aun_queue_lock, flags);
922 kfree_skb(skb);
923}
924
925/*
926 * Deal with received AUN frames - sort out what type of thing it is
927 * and hand it to the right function.
928 */
929
930static void aun_data_available(struct sock *sk, int slen)
931{
932 int err;
933 struct sk_buff *skb;
934 unsigned char *data;
935 struct aunhdr *ah;
936 size_t len;
937
938 while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) {
939 if (err == -EAGAIN) {
940 pr_err("AUN: no data available?!\n");
941 return;
942 }
943 pr_debug("AUN: recvfrom() error %d\n", -err);
944 }
945
946 data = skb_transport_header(skb) + sizeof(struct udphdr);
947 ah = (struct aunhdr *)data;
948 len = skb->len - sizeof(struct udphdr);
949
950 switch (ah->code) {
951 case 2:
952 aun_incoming(skb, ah, len);
953 break;
954 case 3:
955 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK);
956 break;
957 case 4:
958 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING);
959 break;
960 default:
961 pr_debug("AUN: unknown packet type: %d\n", data[0]);
962 }
963
964 skb_free_datagram(sk, skb);
965}
966
967/*
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
971 * drop the packet.
972 */
973
974static void ab_cleanup(unsigned long h)
975{
976 struct sk_buff *skb, *n;
977 unsigned long flags;
978
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);
986 kfree_skb(skb);
987 }
988 }
989 spin_unlock_irqrestore(&aun_queue_lock, flags);
990
991 mod_timer(&ab_cleanup_timer, jiffies + (HZ * 2));
992}
993
994static int __init aun_udp_initialise(void)
995{
996 int error;
997 struct sockaddr_in sin;
998
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);
1003
1004 memset(&sin, 0, sizeof(sin));
1005 sin.sin_port = htons(AUN_PORT);
1006
1007 /* We can count ourselves lucky Acorn machines are too dim to
1008 speak IPv6. :-) */
1009 error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock);
1010 if (error < 0) {
1011 pr_err("AUN: socket error %d\n", -error);
1012 return error;
1013 }
1014
1015 udpsock->sk->sk_reuse = SK_CAN_REUSE;
1016 udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it
1017 from interrupts */
1018
1019 error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin,
1020 sizeof(sin));
1021 if (error < 0) {
1022 pr_err("AUN: bind error %d\n", -error);
1023 goto release;
1024 }
1025
1026 udpsock->sk->sk_data_ready = aun_data_available;
1027
1028 return 0;
1029
1030release:
1031 sock_release(udpsock);
1032 udpsock = NULL;
1033 return error;
1034}
1035#endif
1036
1037#ifdef CONFIG_ECONET_NATIVE
1038
1039/*
1040 * Receive an Econet frame from a device.
1041 */
1042
1043static int econet_rcv(struct sk_buff *skb, struct net_device *dev,
1044 struct packet_type *pt, struct net_device *orig_dev)
1045{
1046 struct ec_framehdr *hdr;
1047 struct sock *sk = NULL;
1048 struct ec_device *edev = dev->ec_ptr;
1049
1050 if (!net_eq(dev_net(dev), &init_net))
1051 goto drop;
1052
1053 if (skb->pkt_type == PACKET_OTHERHOST)
1054 goto drop;
1055
1056 if (!edev)
1057 goto drop;
1058
1059 skb = skb_share_check(skb, GFP_ATOMIC);
1060 if (skb == NULL)
1061 return NET_RX_DROP;
1062
1063 if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
1064 goto drop;
1065
1066 hdr = (struct ec_framehdr *)skb->data;
1067
1068 /* First check for encapsulated IP */
1069 if (hdr->port == EC_PORT_IP) {
1070 skb->protocol = htons(ETH_P_IP);
1071 skb_pull(skb, sizeof(struct ec_framehdr));
1072 netif_rx(skb);
1073 return NET_RX_SUCCESS;
1074 }
1075
1076 sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
1077 if (!sk)
1078 goto drop;
1079
1080 if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb,
1081 hdr->port))
1082 goto drop;
1083 sock_put(sk);
1084 return NET_RX_SUCCESS;
1085
1086drop:
1087 if (sk)
1088 sock_put(sk);
1089 kfree_skb(skb);
1090 return NET_RX_DROP;
1091}
1092
1093static struct packet_type econet_packet_type __read_mostly = {
1094 .type = cpu_to_be16(ETH_P_ECONET),
1095 .func = econet_rcv,
1096};
1097
1098static void econet_hw_initialise(void)
1099{
1100 dev_add_pack(&econet_packet_type);
1101}
1102
1103#endif
1104
1105static int econet_notifier(struct notifier_block *this, unsigned long msg,
1106 void *data)
1107{
1108 struct net_device *dev = data;
1109 struct ec_device *edev;
1110
1111 if (!net_eq(dev_net(dev), &init_net))
1112 return NOTIFY_DONE;
1113
1114 switch (msg) {
1115 case NETDEV_UNREGISTER:
1116 /* A device has gone down - kill any data we hold for it. */
1117 edev = dev->ec_ptr;
1118 if (edev) {
1119 if (net2dev_map[0] == dev)
1120 net2dev_map[0] = NULL;
1121 net2dev_map[edev->net] = NULL;
1122 kfree(edev);
1123 dev->ec_ptr = NULL;
1124 }
1125 break;
1126 }
1127
1128 return NOTIFY_DONE;
1129}
1130
1131static struct notifier_block econet_netdev_notifier = {
1132 .notifier_call = econet_notifier,
1133};
1134
1135static void __exit econet_proto_exit(void)
1136{
1137#ifdef CONFIG_ECONET_AUNUDP
1138 del_timer(&ab_cleanup_timer);
1139 if (udpsock)
1140 sock_release(udpsock);
1141#endif
1142 unregister_netdevice_notifier(&econet_netdev_notifier);
1143#ifdef CONFIG_ECONET_NATIVE
1144 dev_remove_pack(&econet_packet_type);
1145#endif
1146 sock_unregister(econet_family_ops.family);
1147 proto_unregister(&econet_proto);
1148}
1149
1150static int __init econet_proto_init(void)
1151{
1152 int err = proto_register(&econet_proto, 0);
1153
1154 if (err != 0)
1155 goto out;
1156 sock_register(&econet_family_ops);
1157#ifdef CONFIG_ECONET_AUNUDP
1158 aun_udp_initialise();
1159#endif
1160#ifdef CONFIG_ECONET_NATIVE
1161 econet_hw_initialise();
1162#endif
1163 register_netdevice_notifier(&econet_netdev_notifier);
1164out:
1165 return err;
1166}
1167
1168module_init(econet_proto_init);
1169module_exit(econet_proto_exit);
1170
1171MODULE_LICENSE("GPL");
1172MODULE_ALIAS_NETPROTO(PF_ECONET);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-01 07:32:04 -0400