ia64/linux-2.6.18-xen.hg

view net/ipx/af_ipx.c @ 673:3161879fdf22

[IA64] xencomm: support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap

support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Tue Sep 16 21:26:15 2008 +0900 (2008-09-16)
parents 831230e53067
children
line source
1 /*
2 * Implements an IPX socket layer.
3 *
4 * This code is derived from work by
5 * Ross Biro : Writing the original IP stack
6 * Fred Van Kempen : Tidying up the TCP/IP
7 *
8 * Many thanks go to Keith Baker, Institute For Industrial Information
9 * Technology Ltd, Swansea University for allowing me to work on this
10 * in my own time even though it was in some ways related to commercial
11 * work I am currently employed to do there.
12 *
13 * All the material in this file is subject to the Gnu license version 2.
14 * Neither Alan Cox nor the Swansea University Computer Society admit
15 * liability nor provide warranty for any of this software. This material
16 * is provided as is and at no charge.
17 *
18 * Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br>
19 * Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor
20 * provide warranty for any of this software. This material is provided
21 * "AS-IS" and at no charge.
22 *
23 * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
24 * Neither Greg Page nor Caldera, Inc. admit liability nor provide
25 * warranty for any of this software. This material is provided
26 * "AS-IS" and at no charge.
27 *
28 * See net/ipx/ChangeLog.
29 */
31 #include <linux/capability.h>
32 #include <linux/errno.h>
33 #include <linux/if_arp.h>
34 #include <linux/if_ether.h>
35 #include <linux/init.h>
36 #include <linux/ipx.h>
37 #include <linux/kernel.h>
38 #include <linux/list.h>
39 #include <linux/module.h>
40 #include <linux/net.h>
41 #include <linux/netdevice.h>
42 #include <linux/uio.h>
43 #include <linux/skbuff.h>
44 #include <linux/socket.h>
45 #include <linux/sockios.h>
46 #include <linux/string.h>
47 #include <linux/types.h>
48 #include <linux/termios.h>
50 #include <net/ipx.h>
51 #include <net/p8022.h>
52 #include <net/psnap.h>
53 #include <net/sock.h>
54 #include <net/tcp_states.h>
56 #include <asm/uaccess.h>
58 #ifdef CONFIG_SYSCTL
59 extern void ipx_register_sysctl(void);
60 extern void ipx_unregister_sysctl(void);
61 #else
62 #define ipx_register_sysctl()
63 #define ipx_unregister_sysctl()
64 #endif
66 /* Configuration Variables */
67 static unsigned char ipxcfg_max_hops = 16;
68 static char ipxcfg_auto_select_primary;
69 static char ipxcfg_auto_create_interfaces;
70 int sysctl_ipx_pprop_broadcasting = 1;
72 /* Global Variables */
73 static struct datalink_proto *p8022_datalink;
74 static struct datalink_proto *pEII_datalink;
75 static struct datalink_proto *p8023_datalink;
76 static struct datalink_proto *pSNAP_datalink;
78 static const struct proto_ops ipx_dgram_ops;
80 LIST_HEAD(ipx_interfaces);
81 DEFINE_SPINLOCK(ipx_interfaces_lock);
83 struct ipx_interface *ipx_primary_net;
84 struct ipx_interface *ipx_internal_net;
86 extern int ipxrtr_add_route(__u32 network, struct ipx_interface *intrfc,
87 unsigned char *node);
88 extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
89 extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
90 struct iovec *iov, int len, int noblock);
91 extern int ipxrtr_route_skb(struct sk_buff *skb);
92 extern struct ipx_route *ipxrtr_lookup(__u32 net);
93 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
95 #undef IPX_REFCNT_DEBUG
96 #ifdef IPX_REFCNT_DEBUG
97 atomic_t ipx_sock_nr;
98 #endif
100 struct ipx_interface *ipx_interfaces_head(void)
101 {
102 struct ipx_interface *rc = NULL;
104 if (!list_empty(&ipx_interfaces))
105 rc = list_entry(ipx_interfaces.next,
106 struct ipx_interface, node);
107 return rc;
108 }
110 static void ipxcfg_set_auto_select(char val)
111 {
112 ipxcfg_auto_select_primary = val;
113 if (val && !ipx_primary_net)
114 ipx_primary_net = ipx_interfaces_head();
115 }
117 static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
118 {
119 struct ipx_config_data vals;
121 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
122 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
124 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
125 }
127 /*
128 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
129 * handler using this technique. They can be added although we do not
130 * use this facility.
131 */
133 static void ipx_remove_socket(struct sock *sk)
134 {
135 /* Determine interface with which socket is associated */
136 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
138 if (!intrfc)
139 goto out;
141 ipxitf_hold(intrfc);
142 spin_lock_bh(&intrfc->if_sklist_lock);
143 sk_del_node_init(sk);
144 spin_unlock_bh(&intrfc->if_sklist_lock);
145 ipxitf_put(intrfc);
146 out:
147 return;
148 }
150 static void ipx_destroy_socket(struct sock *sk)
151 {
152 ipx_remove_socket(sk);
153 skb_queue_purge(&sk->sk_receive_queue);
154 #ifdef IPX_REFCNT_DEBUG
155 atomic_dec(&ipx_sock_nr);
156 printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
157 atomic_read(&ipx_sock_nr));
158 if (atomic_read(&sk->sk_refcnt) != 1)
159 printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
160 sk, atomic_read(&sk->sk_refcnt));
161 #endif
162 sock_put(sk);
163 }
165 /*
166 * The following code is used to support IPX Interfaces (IPXITF). An
167 * IPX interface is defined by a physical device and a frame type.
168 */
170 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
172 static void ipxitf_clear_primary_net(void)
173 {
174 ipx_primary_net = NULL;
175 if (ipxcfg_auto_select_primary)
176 ipx_primary_net = ipx_interfaces_head();
177 }
179 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
180 unsigned short datalink)
181 {
182 struct ipx_interface *i;
184 list_for_each_entry(i, &ipx_interfaces, node)
185 if (i->if_dev == dev && i->if_dlink_type == datalink)
186 goto out;
187 i = NULL;
188 out:
189 return i;
190 }
192 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
193 unsigned short datalink)
194 {
195 struct ipx_interface *i;
197 spin_lock_bh(&ipx_interfaces_lock);
198 i = __ipxitf_find_using_phys(dev, datalink);
199 if (i)
200 ipxitf_hold(i);
201 spin_unlock_bh(&ipx_interfaces_lock);
202 return i;
203 }
205 struct ipx_interface *ipxitf_find_using_net(__u32 net)
206 {
207 struct ipx_interface *i;
209 spin_lock_bh(&ipx_interfaces_lock);
210 if (net) {
211 list_for_each_entry(i, &ipx_interfaces, node)
212 if (i->if_netnum == net)
213 goto hold;
214 i = NULL;
215 goto unlock;
216 }
218 i = ipx_primary_net;
219 if (i)
220 hold:
221 ipxitf_hold(i);
222 unlock:
223 spin_unlock_bh(&ipx_interfaces_lock);
224 return i;
225 }
227 /* Sockets are bound to a particular IPX interface. */
228 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
229 {
230 ipxitf_hold(intrfc);
231 spin_lock_bh(&intrfc->if_sklist_lock);
232 ipx_sk(sk)->intrfc = intrfc;
233 sk_add_node(sk, &intrfc->if_sklist);
234 spin_unlock_bh(&intrfc->if_sklist_lock);
235 ipxitf_put(intrfc);
236 }
238 /* caller must hold intrfc->if_sklist_lock */
239 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
240 unsigned short port)
241 {
242 struct sock *s;
243 struct hlist_node *node;
245 sk_for_each(s, node, &intrfc->if_sklist)
246 if (ipx_sk(s)->port == port)
247 goto found;
248 s = NULL;
249 found:
250 return s;
251 }
253 /* caller must hold a reference to intrfc */
254 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
255 unsigned short port)
256 {
257 struct sock *s;
259 spin_lock_bh(&intrfc->if_sklist_lock);
260 s = __ipxitf_find_socket(intrfc, port);
261 if (s)
262 sock_hold(s);
263 spin_unlock_bh(&intrfc->if_sklist_lock);
265 return s;
266 }
268 #ifdef CONFIG_IPX_INTERN
269 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
270 unsigned char *ipx_node,
271 unsigned short port)
272 {
273 struct sock *s;
274 struct hlist_node *node;
276 ipxitf_hold(intrfc);
277 spin_lock_bh(&intrfc->if_sklist_lock);
279 sk_for_each(s, node, &intrfc->if_sklist) {
280 struct ipx_sock *ipxs = ipx_sk(s);
282 if (ipxs->port == port &&
283 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
284 goto found;
285 }
286 s = NULL;
287 found:
288 spin_unlock_bh(&intrfc->if_sklist_lock);
289 ipxitf_put(intrfc);
290 return s;
291 }
292 #endif
294 static void __ipxitf_down(struct ipx_interface *intrfc)
295 {
296 struct sock *s;
297 struct hlist_node *node, *t;
299 /* Delete all routes associated with this interface */
300 ipxrtr_del_routes(intrfc);
302 spin_lock_bh(&intrfc->if_sklist_lock);
303 /* error sockets */
304 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
305 struct ipx_sock *ipxs = ipx_sk(s);
307 s->sk_err = ENOLINK;
308 s->sk_error_report(s);
309 ipxs->intrfc = NULL;
310 ipxs->port = 0;
311 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
312 sk_del_node_init(s);
313 }
314 INIT_HLIST_HEAD(&intrfc->if_sklist);
315 spin_unlock_bh(&intrfc->if_sklist_lock);
317 /* remove this interface from list */
318 list_del(&intrfc->node);
320 /* remove this interface from *special* networks */
321 if (intrfc == ipx_primary_net)
322 ipxitf_clear_primary_net();
323 if (intrfc == ipx_internal_net)
324 ipx_internal_net = NULL;
326 if (intrfc->if_dev)
327 dev_put(intrfc->if_dev);
328 kfree(intrfc);
329 }
331 void ipxitf_down(struct ipx_interface *intrfc)
332 {
333 spin_lock_bh(&ipx_interfaces_lock);
334 __ipxitf_down(intrfc);
335 spin_unlock_bh(&ipx_interfaces_lock);
336 }
338 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
339 {
340 if (atomic_dec_and_test(&intrfc->refcnt))
341 __ipxitf_down(intrfc);
342 }
344 static int ipxitf_device_event(struct notifier_block *notifier,
345 unsigned long event, void *ptr)
346 {
347 struct net_device *dev = ptr;
348 struct ipx_interface *i, *tmp;
350 if (event != NETDEV_DOWN && event != NETDEV_UP)
351 goto out;
353 spin_lock_bh(&ipx_interfaces_lock);
354 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
355 if (i->if_dev == dev) {
356 if (event == NETDEV_UP)
357 ipxitf_hold(i);
358 else
359 __ipxitf_put(i);
360 }
361 spin_unlock_bh(&ipx_interfaces_lock);
362 out:
363 return NOTIFY_DONE;
364 }
367 static __exit void ipxitf_cleanup(void)
368 {
369 struct ipx_interface *i, *tmp;
371 spin_lock_bh(&ipx_interfaces_lock);
372 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
373 __ipxitf_put(i);
374 spin_unlock_bh(&ipx_interfaces_lock);
375 }
377 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
378 {
379 if (sock_queue_rcv_skb(sock, skb) < 0)
380 kfree_skb(skb);
381 }
383 /*
384 * On input skb->sk is NULL. Nobody is charged for the memory.
385 */
387 /* caller must hold a reference to intrfc */
389 #ifdef CONFIG_IPX_INTERN
390 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
391 struct sk_buff *skb, int copy)
392 {
393 struct ipxhdr *ipx = ipx_hdr(skb);
394 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
395 IPX_NODE_LEN);
396 struct sock *s;
397 struct hlist_node *node;
398 int rc;
400 spin_lock_bh(&intrfc->if_sklist_lock);
402 sk_for_each(s, node, &intrfc->if_sklist) {
403 struct ipx_sock *ipxs = ipx_sk(s);
405 if (ipxs->port == ipx->ipx_dest.sock &&
406 (is_broadcast || !memcmp(ipx->ipx_dest.node,
407 ipxs->node, IPX_NODE_LEN))) {
408 /* We found a socket to which to send */
409 struct sk_buff *skb1;
411 if (copy) {
412 skb1 = skb_clone(skb, GFP_ATOMIC);
413 rc = -ENOMEM;
414 if (!skb1)
415 goto out;
416 } else {
417 skb1 = skb;
418 copy = 1; /* skb may only be used once */
419 }
420 ipxitf_def_skb_handler(s, skb1);
422 /* On an external interface, one socket can listen */
423 if (intrfc != ipx_internal_net)
424 break;
425 }
426 }
428 /* skb was solely for us, and we did not make a copy, so free it. */
429 if (!copy)
430 kfree_skb(skb);
432 rc = 0;
433 out:
434 spin_unlock_bh(&intrfc->if_sklist_lock);
435 return rc;
436 }
437 #else
438 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
439 struct ipxhdr *ipx)
440 {
441 /* The packet's target is a NCP connection handler. We want to hand it
442 * to the correct socket directly within the kernel, so that the
443 * mars_nwe packet distribution process does not have to do it. Here we
444 * only care about NCP and BURST packets.
445 *
446 * You might call this a hack, but believe me, you do not want a
447 * complete NCP layer in the kernel, and this is VERY fast as well. */
448 struct sock *sk = NULL;
449 int connection = 0;
450 u8 *ncphdr = (u8 *)(ipx + 1);
452 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
453 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
454 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
455 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
457 if (connection) {
458 struct hlist_node *node;
459 /* Now we have to look for a special NCP connection handling
460 * socket. Only these sockets have ipx_ncp_conn != 0, set by
461 * SIOCIPXNCPCONN. */
462 spin_lock_bh(&intrfc->if_sklist_lock);
463 sk_for_each(sk, node, &intrfc->if_sklist)
464 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
465 sock_hold(sk);
466 goto found;
467 }
468 sk = NULL;
469 found:
470 spin_unlock_bh(&intrfc->if_sklist_lock);
471 }
472 return sk;
473 }
475 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
476 struct sk_buff *skb, int copy)
477 {
478 struct ipxhdr *ipx = ipx_hdr(skb);
479 struct sock *sock1 = NULL, *sock2 = NULL;
480 struct sk_buff *skb1 = NULL, *skb2 = NULL;
481 int rc;
483 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
484 sock1 = ncp_connection_hack(intrfc, ipx);
485 if (!sock1)
486 /* No special socket found, forward the packet the normal way */
487 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
489 /*
490 * We need to check if there is a primary net and if
491 * this is addressed to one of the *SPECIAL* sockets because
492 * these need to be propagated to the primary net.
493 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
494 * 0x456(Diagnostic).
495 */
497 if (ipx_primary_net && intrfc != ipx_primary_net) {
498 const int dsock = ntohs(ipx->ipx_dest.sock);
500 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
501 /* The appropriate thing to do here is to dup the
502 * packet and route to the primary net interface via
503 * ipxitf_send; however, we'll cheat and just demux it
504 * here. */
505 sock2 = ipxitf_find_socket(ipx_primary_net,
506 ipx->ipx_dest.sock);
507 }
509 /*
510 * If there is nothing to do return. The kfree will cancel any charging.
511 */
512 rc = 0;
513 if (!sock1 && !sock2) {
514 if (!copy)
515 kfree_skb(skb);
516 goto out;
517 }
519 /*
520 * This next segment of code is a little awkward, but it sets it up
521 * so that the appropriate number of copies of the SKB are made and
522 * that skb1 and skb2 point to it (them) so that it (they) can be
523 * demuxed to sock1 and/or sock2. If we are unable to make enough
524 * copies, we do as much as is possible.
525 */
527 if (copy)
528 skb1 = skb_clone(skb, GFP_ATOMIC);
529 else
530 skb1 = skb;
532 rc = -ENOMEM;
533 if (!skb1)
534 goto out_put;
536 /* Do we need 2 SKBs? */
537 if (sock1 && sock2)
538 skb2 = skb_clone(skb1, GFP_ATOMIC);
539 else
540 skb2 = skb1;
542 if (sock1)
543 ipxitf_def_skb_handler(sock1, skb1);
545 if (!skb2)
546 goto out_put;
548 if (sock2)
549 ipxitf_def_skb_handler(sock2, skb2);
551 rc = 0;
552 out_put:
553 if (sock1)
554 sock_put(sock1);
555 if (sock2)
556 sock_put(sock2);
557 out:
558 return rc;
559 }
560 #endif /* CONFIG_IPX_INTERN */
562 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
563 struct sk_buff *skb)
564 {
565 struct sk_buff *skb2;
566 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
567 int out_offset = intrfc->if_ipx_offset;
568 int len;
570 /* Hopefully, most cases */
571 if (in_offset >= out_offset)
572 return skb;
574 /* Need new SKB */
575 len = skb->len + out_offset;
576 skb2 = alloc_skb(len, GFP_ATOMIC);
577 if (skb2) {
578 skb_reserve(skb2, out_offset);
579 skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len);
580 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
581 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
582 }
583 kfree_skb(skb);
584 return skb2;
585 }
587 /* caller must hold a reference to intrfc and the skb has to be unshared */
588 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
589 {
590 struct ipxhdr *ipx = ipx_hdr(skb);
591 struct net_device *dev = intrfc->if_dev;
592 struct datalink_proto *dl = intrfc->if_dlink;
593 char dest_node[IPX_NODE_LEN];
594 int send_to_wire = 1;
595 int addr_len;
597 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
598 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
599 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
601 /* see if we need to include the netnum in the route list */
602 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
603 u32 *last_hop = (u32 *)(((u8 *) skb->data) +
604 sizeof(struct ipxhdr) +
605 IPX_SKB_CB(skb)->last_hop.index *
606 sizeof(u32));
607 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
608 IPX_SKB_CB(skb)->last_hop.index = -1;
609 }
611 /*
612 * We need to know how many skbuffs it will take to send out this
613 * packet to avoid unnecessary copies.
614 */
616 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
617 send_to_wire = 0; /* No non looped */
619 /*
620 * See if this should be demuxed to sockets on this interface
621 *
622 * We want to ensure the original was eaten or that we only use
623 * up clones.
624 */
626 if (ipx->ipx_dest.net == intrfc->if_netnum) {
627 /*
628 * To our own node, loop and free the original.
629 * The internal net will receive on all node address.
630 */
631 if (intrfc == ipx_internal_net ||
632 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
633 /* Don't charge sender */
634 skb_orphan(skb);
636 /* Will charge receiver */
637 return ipxitf_demux_socket(intrfc, skb, 0);
638 }
640 /* Broadcast, loop and possibly keep to send on. */
641 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
642 if (!send_to_wire)
643 skb_orphan(skb);
644 ipxitf_demux_socket(intrfc, skb, send_to_wire);
645 if (!send_to_wire)
646 goto out;
647 }
648 }
650 /*
651 * If the originating net is not equal to our net; this is routed
652 * We are still charging the sender. Which is right - the driver
653 * free will handle this fairly.
654 */
655 if (ipx->ipx_source.net != intrfc->if_netnum) {
656 /*
657 * Unshare the buffer before modifying the count in
658 * case it's a flood or tcpdump
659 */
660 skb = skb_unshare(skb, GFP_ATOMIC);
661 if (!skb)
662 goto out;
663 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
664 send_to_wire = 0;
665 }
667 if (!send_to_wire) {
668 kfree_skb(skb);
669 goto out;
670 }
672 /* Determine the appropriate hardware address */
673 addr_len = dev->addr_len;
674 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
675 memcpy(dest_node, dev->broadcast, addr_len);
676 else
677 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
679 /* Make any compensation for differing physical/data link size */
680 skb = ipxitf_adjust_skbuff(intrfc, skb);
681 if (!skb)
682 goto out;
684 /* set up data link and physical headers */
685 skb->dev = dev;
686 skb->protocol = htons(ETH_P_IPX);
688 /* Send it out */
689 dl->request(dl, skb, dest_node);
690 out:
691 return 0;
692 }
694 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
695 {
696 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
697 }
699 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
700 struct sk_buff *skb);
701 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
703 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
704 {
705 struct ipxhdr *ipx = ipx_hdr(skb);
706 int rc = 0;
708 ipxitf_hold(intrfc);
710 /* See if we should update our network number */
711 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
712 ipxitf_discover_netnum(intrfc, skb);
714 IPX_SKB_CB(skb)->last_hop.index = -1;
715 if (ipx->ipx_type == IPX_TYPE_PPROP) {
716 rc = ipxitf_pprop(intrfc, skb);
717 if (rc)
718 goto out_free_skb;
719 }
721 /* local processing follows */
722 if (!IPX_SKB_CB(skb)->ipx_dest_net)
723 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
724 if (!IPX_SKB_CB(skb)->ipx_source_net)
725 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
727 /* it doesn't make sense to route a pprop packet, there's no meaning
728 * in the ipx_dest_net for such packets */
729 if (ipx->ipx_type != IPX_TYPE_PPROP &&
730 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
731 /* We only route point-to-point packets. */
732 if (skb->pkt_type == PACKET_HOST) {
733 skb = skb_unshare(skb, GFP_ATOMIC);
734 if (skb)
735 rc = ipxrtr_route_skb(skb);
736 goto out_intrfc;
737 }
739 goto out_free_skb;
740 }
742 /* see if we should keep it */
743 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
744 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
745 rc = ipxitf_demux_socket(intrfc, skb, 0);
746 goto out_intrfc;
747 }
749 /* we couldn't pawn it off so unload it */
750 out_free_skb:
751 kfree_skb(skb);
752 out_intrfc:
753 ipxitf_put(intrfc);
754 return rc;
755 }
757 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
758 struct sk_buff *skb)
759 {
760 const struct ipx_cb *cb = IPX_SKB_CB(skb);
762 /* see if this is an intra packet: source_net == dest_net */
763 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
764 struct ipx_interface *i =
765 ipxitf_find_using_net(cb->ipx_source_net);
766 /* NB: NetWare servers lie about their hop count so we
767 * dropped the test based on it. This is the best way
768 * to determine this is a 0 hop count packet. */
769 if (!i) {
770 intrfc->if_netnum = cb->ipx_source_net;
771 ipxitf_add_local_route(intrfc);
772 } else {
773 printk(KERN_WARNING "IPX: Network number collision "
774 "%lx\n %s %s and %s %s\n",
775 (unsigned long) htonl(cb->ipx_source_net),
776 ipx_device_name(i),
777 ipx_frame_name(i->if_dlink_type),
778 ipx_device_name(intrfc),
779 ipx_frame_name(intrfc->if_dlink_type));
780 ipxitf_put(i);
781 }
782 }
783 }
785 /**
786 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
787 * NetBIOS broadcasts
788 * @intrfc: IPX interface receiving this packet
789 * @skb: Received packet
790 *
791 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
792 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
793 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
794 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
795 * RIP and SAP Router Specification", Part Number 107-000029-001.
796 *
797 * If it is valid, check if we have pprop broadcasting enabled by the user,
798 * if not, just return zero for local processing.
799 *
800 * If it is enabled check the packet and don't broadcast it if we have already
801 * seen this packet.
802 *
803 * Broadcast: send it to the interfaces that aren't on the packet visited nets
804 * array, just after the IPX header.
805 *
806 * Returns -EINVAL for invalid packets, so that the calling function drops
807 * the packet without local processing. 0 if packet is to be locally processed.
808 */
809 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
810 {
811 struct ipxhdr *ipx = ipx_hdr(skb);
812 int i, rc = -EINVAL;
813 struct ipx_interface *ifcs;
814 char *c;
815 u32 *l;
817 /* Illegal packet - too many hops or too short */
818 /* We decide to throw it away: no broadcasting, no local processing.
819 * NetBIOS unaware implementations route them as normal packets -
820 * tctrl <= 15, any data payload... */
821 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
822 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
823 IPX_MAX_PPROP_HOPS * sizeof(u32))
824 goto out;
825 /* are we broadcasting this damn thing? */
826 rc = 0;
827 if (!sysctl_ipx_pprop_broadcasting)
828 goto out;
829 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
830 * process it locally. All previous hops broadcasted it, and process it
831 * locally. */
832 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
833 goto out;
835 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
836 l = (u32 *) c;
838 /* Don't broadcast packet if already seen this net */
839 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
840 if (*l++ == intrfc->if_netnum)
841 goto out;
843 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
844 * position where we will insert recvd netnum into list, later on,
845 * in ipxitf_send */
846 IPX_SKB_CB(skb)->last_hop.index = i;
847 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
848 /* xmit on all other interfaces... */
849 spin_lock_bh(&ipx_interfaces_lock);
850 list_for_each_entry(ifcs, &ipx_interfaces, node) {
851 /* Except unconfigured interfaces */
852 if (!ifcs->if_netnum)
853 continue;
855 /* That aren't in the list */
856 if (ifcs == intrfc)
857 continue;
858 l = (__u32 *) c;
859 /* don't consider the last entry in the packet list,
860 * it is our netnum, and it is not there yet */
861 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
862 if (ifcs->if_netnum == *l++)
863 break;
864 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
865 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
867 if (s) {
868 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
869 ipxrtr_route_skb(s);
870 }
871 }
872 }
873 spin_unlock_bh(&ipx_interfaces_lock);
874 out:
875 return rc;
876 }
878 static void ipxitf_insert(struct ipx_interface *intrfc)
879 {
880 spin_lock_bh(&ipx_interfaces_lock);
881 list_add_tail(&intrfc->node, &ipx_interfaces);
882 spin_unlock_bh(&ipx_interfaces_lock);
884 if (ipxcfg_auto_select_primary && !ipx_primary_net)
885 ipx_primary_net = intrfc;
886 }
888 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum,
889 unsigned short dlink_type,
890 struct datalink_proto *dlink,
891 unsigned char internal,
892 int ipx_offset)
893 {
894 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
896 if (intrfc) {
897 intrfc->if_dev = dev;
898 intrfc->if_netnum = netnum;
899 intrfc->if_dlink_type = dlink_type;
900 intrfc->if_dlink = dlink;
901 intrfc->if_internal = internal;
902 intrfc->if_ipx_offset = ipx_offset;
903 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
904 INIT_HLIST_HEAD(&intrfc->if_sklist);
905 atomic_set(&intrfc->refcnt, 1);
906 spin_lock_init(&intrfc->if_sklist_lock);
907 }
909 return intrfc;
910 }
912 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
913 {
914 struct ipx_interface *intrfc;
915 int rc = -EEXIST;
917 /* Only one primary network allowed */
918 if (ipx_primary_net)
919 goto out;
921 /* Must have a valid network number */
922 rc = -EADDRNOTAVAIL;
923 if (!idef->ipx_network)
924 goto out;
925 intrfc = ipxitf_find_using_net(idef->ipx_network);
926 rc = -EADDRINUSE;
927 if (intrfc) {
928 ipxitf_put(intrfc);
929 goto out;
930 }
931 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
932 rc = -EAGAIN;
933 if (!intrfc)
934 goto out;
935 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
936 ipx_internal_net = ipx_primary_net = intrfc;
937 ipxitf_hold(intrfc);
938 ipxitf_insert(intrfc);
940 rc = ipxitf_add_local_route(intrfc);
941 ipxitf_put(intrfc);
942 out:
943 return rc;
944 }
946 static __be16 ipx_map_frame_type(unsigned char type)
947 {
948 __be16 rc = 0;
950 switch (type) {
951 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
952 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
953 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
954 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
955 }
957 return rc;
958 }
960 static int ipxitf_create(struct ipx_interface_definition *idef)
961 {
962 struct net_device *dev;
963 unsigned short dlink_type = 0;
964 struct datalink_proto *datalink = NULL;
965 struct ipx_interface *intrfc;
966 int rc;
968 if (idef->ipx_special == IPX_INTERNAL) {
969 rc = ipxitf_create_internal(idef);
970 goto out;
971 }
973 rc = -EEXIST;
974 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
975 goto out;
977 intrfc = ipxitf_find_using_net(idef->ipx_network);
978 rc = -EADDRINUSE;
979 if (idef->ipx_network && intrfc) {
980 ipxitf_put(intrfc);
981 goto out;
982 }
984 if (intrfc)
985 ipxitf_put(intrfc);
987 dev = dev_get_by_name(idef->ipx_device);
988 rc = -ENODEV;
989 if (!dev)
990 goto out;
992 switch (idef->ipx_dlink_type) {
993 case IPX_FRAME_TR_8022:
994 printk(KERN_WARNING "IPX frame type 802.2TR is "
995 "obsolete Use 802.2 instead.\n");
996 /* fall through */
997 case IPX_FRAME_8022:
998 dlink_type = htons(ETH_P_802_2);
999 datalink = p8022_datalink;
1000 break;
1001 case IPX_FRAME_ETHERII:
1002 if (dev->type != ARPHRD_IEEE802) {
1003 dlink_type = htons(ETH_P_IPX);
1004 datalink = pEII_datalink;
1005 break;
1006 } else
1007 printk(KERN_WARNING "IPX frame type EtherII over "
1008 "token-ring is obsolete. Use SNAP "
1009 "instead.\n");
1010 /* fall through */
1011 case IPX_FRAME_SNAP:
1012 dlink_type = htons(ETH_P_SNAP);
1013 datalink = pSNAP_datalink;
1014 break;
1015 case IPX_FRAME_8023:
1016 dlink_type = htons(ETH_P_802_3);
1017 datalink = p8023_datalink;
1018 break;
1019 case IPX_FRAME_NONE:
1020 default:
1021 rc = -EPROTONOSUPPORT;
1022 goto out_dev;
1025 rc = -ENETDOWN;
1026 if (!(dev->flags & IFF_UP))
1027 goto out_dev;
1029 /* Check addresses are suitable */
1030 rc = -EINVAL;
1031 if (dev->addr_len > IPX_NODE_LEN)
1032 goto out_dev;
1034 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1035 if (!intrfc) {
1036 /* Ok now create */
1037 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1038 datalink, 0, dev->hard_header_len +
1039 datalink->header_length);
1040 rc = -EAGAIN;
1041 if (!intrfc)
1042 goto out_dev;
1043 /* Setup primary if necessary */
1044 if (idef->ipx_special == IPX_PRIMARY)
1045 ipx_primary_net = intrfc;
1046 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1047 IPX_NODE_LEN)) {
1048 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1049 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1050 dev->dev_addr, dev->addr_len);
1051 } else
1052 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1053 ipxitf_hold(intrfc);
1054 ipxitf_insert(intrfc);
1058 /* If the network number is known, add a route */
1059 rc = 0;
1060 if (!intrfc->if_netnum)
1061 goto out_intrfc;
1063 rc = ipxitf_add_local_route(intrfc);
1064 out_intrfc:
1065 ipxitf_put(intrfc);
1066 goto out;
1067 out_dev:
1068 dev_put(dev);
1069 out:
1070 return rc;
1073 static int ipxitf_delete(struct ipx_interface_definition *idef)
1075 struct net_device *dev = NULL;
1076 unsigned short dlink_type = 0;
1077 struct ipx_interface *intrfc;
1078 int rc = 0;
1080 spin_lock_bh(&ipx_interfaces_lock);
1081 if (idef->ipx_special == IPX_INTERNAL) {
1082 if (ipx_internal_net) {
1083 __ipxitf_put(ipx_internal_net);
1084 goto out;
1086 rc = -ENOENT;
1087 goto out;
1090 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1091 rc = -EPROTONOSUPPORT;
1092 if (!dlink_type)
1093 goto out;
1095 dev = __dev_get_by_name(idef->ipx_device);
1096 rc = -ENODEV;
1097 if (!dev)
1098 goto out;
1100 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1101 rc = -EINVAL;
1102 if (!intrfc)
1103 goto out;
1104 __ipxitf_put(intrfc);
1106 rc = 0;
1107 out:
1108 spin_unlock_bh(&ipx_interfaces_lock);
1109 return rc;
1112 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1113 unsigned short dlink_type)
1115 struct ipx_interface *intrfc = NULL;
1116 struct datalink_proto *datalink;
1118 if (!dev)
1119 goto out;
1121 /* Check addresses are suitable */
1122 if (dev->addr_len > IPX_NODE_LEN)
1123 goto out;
1125 switch (htons(dlink_type)) {
1126 case ETH_P_IPX: datalink = pEII_datalink; break;
1127 case ETH_P_802_2: datalink = p8022_datalink; break;
1128 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1129 case ETH_P_802_3: datalink = p8023_datalink; break;
1130 default: goto out;
1133 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1134 dev->hard_header_len + datalink->header_length);
1136 if (intrfc) {
1137 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1138 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1139 dev->dev_addr, dev->addr_len);
1140 spin_lock_init(&intrfc->if_sklist_lock);
1141 atomic_set(&intrfc->refcnt, 1);
1142 ipxitf_insert(intrfc);
1143 dev_hold(dev);
1146 out:
1147 return intrfc;
1150 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1152 int rc = -EINVAL;
1153 struct ifreq ifr;
1154 int val;
1156 switch (cmd) {
1157 case SIOCSIFADDR: {
1158 struct sockaddr_ipx *sipx;
1159 struct ipx_interface_definition f;
1161 rc = -EFAULT;
1162 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1163 break;
1164 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1165 rc = -EINVAL;
1166 if (sipx->sipx_family != AF_IPX)
1167 break;
1168 f.ipx_network = sipx->sipx_network;
1169 memcpy(f.ipx_device, ifr.ifr_name,
1170 sizeof(f.ipx_device));
1171 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1172 f.ipx_dlink_type = sipx->sipx_type;
1173 f.ipx_special = sipx->sipx_special;
1175 if (sipx->sipx_action == IPX_DLTITF)
1176 rc = ipxitf_delete(&f);
1177 else
1178 rc = ipxitf_create(&f);
1179 break;
1181 case SIOCGIFADDR: {
1182 struct sockaddr_ipx *sipx;
1183 struct ipx_interface *ipxif;
1184 struct net_device *dev;
1186 rc = -EFAULT;
1187 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1188 break;
1189 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1190 dev = __dev_get_by_name(ifr.ifr_name);
1191 rc = -ENODEV;
1192 if (!dev)
1193 break;
1194 ipxif = ipxitf_find_using_phys(dev,
1195 ipx_map_frame_type(sipx->sipx_type));
1196 rc = -EADDRNOTAVAIL;
1197 if (!ipxif)
1198 break;
1200 sipx->sipx_family = AF_IPX;
1201 sipx->sipx_network = ipxif->if_netnum;
1202 memcpy(sipx->sipx_node, ipxif->if_node,
1203 sizeof(sipx->sipx_node));
1204 rc = -EFAULT;
1205 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1206 break;
1207 ipxitf_put(ipxif);
1208 rc = 0;
1209 break;
1211 case SIOCAIPXITFCRT:
1212 rc = -EFAULT;
1213 if (get_user(val, (unsigned char __user *) arg))
1214 break;
1215 rc = 0;
1216 ipxcfg_auto_create_interfaces = val;
1217 break;
1218 case SIOCAIPXPRISLT:
1219 rc = -EFAULT;
1220 if (get_user(val, (unsigned char __user *) arg))
1221 break;
1222 rc = 0;
1223 ipxcfg_set_auto_select(val);
1224 break;
1227 return rc;
1230 /*
1231 * Checksum routine for IPX
1232 */
1234 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1235 /* This functions should *not* mess with packet contents */
1237 __u16 ipx_cksum(struct ipxhdr *packet, int length)
1239 /*
1240 * NOTE: sum is a net byte order quantity, which optimizes the
1241 * loop. This only works on big and little endian machines. (I
1242 * don't know of a machine that isn't.)
1243 */
1244 /* start at ipx_dest - We skip the checksum field and start with
1245 * ipx_type before the loop, not considering ipx_tctrl in the calc */
1246 __u16 *p = (__u16 *)&packet->ipx_dest;
1247 __u32 i = (length >> 1) - 1; /* Number of complete words */
1248 __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl);
1250 /* Loop through all complete words except the checksum field,
1251 * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */
1252 while (--i)
1253 sum += *p++;
1255 /* Add on the last part word if it exists */
1256 if (packet->ipx_pktsize & htons(1))
1257 sum += ntohs(0xff00) & *p;
1259 /* Do final fixup */
1260 sum = (sum & 0xffff) + (sum >> 16);
1262 /* It's a pity there's no concept of carry in C */
1263 if (sum >= 0x10000)
1264 sum++;
1266 return ~sum;
1269 const char *ipx_frame_name(unsigned short frame)
1271 char* rc = "None";
1273 switch (ntohs(frame)) {
1274 case ETH_P_IPX: rc = "EtherII"; break;
1275 case ETH_P_802_2: rc = "802.2"; break;
1276 case ETH_P_SNAP: rc = "SNAP"; break;
1277 case ETH_P_802_3: rc = "802.3"; break;
1278 case ETH_P_TR_802_2: rc = "802.2TR"; break;
1281 return rc;
1284 const char *ipx_device_name(struct ipx_interface *intrfc)
1286 return intrfc->if_internal ? "Internal" :
1287 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1290 /* Handling for system calls applied via the various interfaces to an IPX
1291 * socket object. */
1293 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1294 char __user *optval, int optlen)
1296 struct sock *sk = sock->sk;
1297 int opt;
1298 int rc = -EINVAL;
1300 if (optlen != sizeof(int))
1301 goto out;
1303 rc = -EFAULT;
1304 if (get_user(opt, (unsigned int __user *)optval))
1305 goto out;
1307 rc = -ENOPROTOOPT;
1308 if (!(level == SOL_IPX && optname == IPX_TYPE))
1309 goto out;
1311 ipx_sk(sk)->type = opt;
1312 rc = 0;
1313 out:
1314 return rc;
1317 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1318 char __user *optval, int __user *optlen)
1320 struct sock *sk = sock->sk;
1321 int val = 0;
1322 int len;
1323 int rc = -ENOPROTOOPT;
1325 if (!(level == SOL_IPX && optname == IPX_TYPE))
1326 goto out;
1328 val = ipx_sk(sk)->type;
1330 rc = -EFAULT;
1331 if (get_user(len, optlen))
1332 goto out;
1334 len = min_t(unsigned int, len, sizeof(int));
1335 rc = -EINVAL;
1336 if(len < 0)
1337 goto out;
1339 rc = -EFAULT;
1340 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1341 goto out;
1343 rc = 0;
1344 out:
1345 return rc;
1348 static struct proto ipx_proto = {
1349 .name = "IPX",
1350 .owner = THIS_MODULE,
1351 .obj_size = sizeof(struct ipx_sock),
1352 };
1354 static int ipx_create(struct socket *sock, int protocol)
1356 int rc = -ESOCKTNOSUPPORT;
1357 struct sock *sk;
1359 /*
1360 * SPX support is not anymore in the kernel sources. If you want to
1361 * ressurrect it, completing it and making it understand shared skbs,
1362 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1363 * tree.
1364 */
1365 if (sock->type != SOCK_DGRAM)
1366 goto out;
1368 rc = -ENOMEM;
1369 sk = sk_alloc(PF_IPX, GFP_KERNEL, &ipx_proto, 1);
1370 if (!sk)
1371 goto out;
1372 #ifdef IPX_REFCNT_DEBUG
1373 atomic_inc(&ipx_sock_nr);
1374 printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
1375 atomic_read(&ipx_sock_nr));
1376 #endif
1377 sock_init_data(sock, sk);
1378 sk->sk_no_check = 1; /* Checksum off by default */
1379 sock->ops = &ipx_dgram_ops;
1380 rc = 0;
1381 out:
1382 return rc;
1385 static int ipx_release(struct socket *sock)
1387 struct sock *sk = sock->sk;
1389 if (!sk)
1390 goto out;
1392 if (!sock_flag(sk, SOCK_DEAD))
1393 sk->sk_state_change(sk);
1395 sock_set_flag(sk, SOCK_DEAD);
1396 sock->sk = NULL;
1397 ipx_destroy_socket(sk);
1398 out:
1399 return 0;
1402 /* caller must hold a reference to intrfc */
1404 static unsigned short ipx_first_free_socketnum(struct ipx_interface *intrfc)
1406 unsigned short socketNum = intrfc->if_sknum;
1408 spin_lock_bh(&intrfc->if_sklist_lock);
1410 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1411 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1413 while (__ipxitf_find_socket(intrfc, ntohs(socketNum)))
1414 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1415 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1416 else
1417 socketNum++;
1419 spin_unlock_bh(&intrfc->if_sklist_lock);
1420 intrfc->if_sknum = socketNum;
1422 return ntohs(socketNum);
1425 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1427 struct sock *sk = sock->sk;
1428 struct ipx_sock *ipxs = ipx_sk(sk);
1429 struct ipx_interface *intrfc;
1430 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1431 int rc = -EINVAL;
1433 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1434 goto out;
1436 intrfc = ipxitf_find_using_net(addr->sipx_network);
1437 rc = -EADDRNOTAVAIL;
1438 if (!intrfc)
1439 goto out;
1441 if (!addr->sipx_port) {
1442 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1443 rc = -EINVAL;
1444 if (!addr->sipx_port)
1445 goto out_put;
1448 /* protect IPX system stuff like routing/sap */
1449 rc = -EACCES;
1450 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1451 !capable(CAP_NET_ADMIN))
1452 goto out_put;
1454 ipxs->port = addr->sipx_port;
1456 #ifdef CONFIG_IPX_INTERN
1457 if (intrfc == ipx_internal_net) {
1458 /* The source address is to be set explicitly if the
1459 * socket is to be bound on the internal network. If a
1460 * node number 0 was specified, the default is used.
1461 */
1463 rc = -EINVAL;
1464 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1465 goto out_put;
1466 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1467 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1468 else
1469 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1471 rc = -EADDRINUSE;
1472 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1473 ipxs->port)) {
1474 SOCK_DEBUG(sk,
1475 "IPX: bind failed because port %X in use.\n",
1476 ntohs((int)addr->sipx_port));
1477 goto out_put;
1479 } else {
1480 /* Source addresses are easy. It must be our
1481 * network:node pair for an interface routed to IPX
1482 * with the ipx routing ioctl()
1483 */
1485 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1487 rc = -EADDRINUSE;
1488 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1489 SOCK_DEBUG(sk,
1490 "IPX: bind failed because port %X in use.\n",
1491 ntohs((int)addr->sipx_port));
1492 goto out_put;
1496 #else /* !def CONFIG_IPX_INTERN */
1498 /* Source addresses are easy. It must be our network:node pair for
1499 an interface routed to IPX with the ipx routing ioctl() */
1501 rc = -EADDRINUSE;
1502 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1503 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1504 ntohs((int)addr->sipx_port));
1505 goto out_put;
1508 #endif /* CONFIG_IPX_INTERN */
1510 ipxitf_insert_socket(intrfc, sk);
1511 sock_reset_flag(sk, SOCK_ZAPPED);
1513 rc = 0;
1514 out_put:
1515 ipxitf_put(intrfc);
1516 out:
1517 return rc;
1520 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1521 int addr_len, int flags)
1523 struct sock *sk = sock->sk;
1524 struct ipx_sock *ipxs = ipx_sk(sk);
1525 struct sockaddr_ipx *addr;
1526 int rc = -EINVAL;
1527 struct ipx_route *rt;
1529 sk->sk_state = TCP_CLOSE;
1530 sock->state = SS_UNCONNECTED;
1532 if (addr_len != sizeof(*addr))
1533 goto out;
1534 addr = (struct sockaddr_ipx *)uaddr;
1536 /* put the autobinding in */
1537 if (!ipxs->port) {
1538 struct sockaddr_ipx uaddr;
1540 uaddr.sipx_port = 0;
1541 uaddr.sipx_network = 0;
1543 #ifdef CONFIG_IPX_INTERN
1544 rc = -ENETDOWN;
1545 if (!ipxs->intrfc)
1546 goto out; /* Someone zonked the iface */
1547 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1548 IPX_NODE_LEN);
1549 #endif /* CONFIG_IPX_INTERN */
1551 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1552 sizeof(struct sockaddr_ipx));
1553 if (rc)
1554 goto out;
1557 /* We can either connect to primary network or somewhere
1558 * we can route to */
1559 rt = ipxrtr_lookup(addr->sipx_network);
1560 rc = -ENETUNREACH;
1561 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1562 goto out;
1564 ipxs->dest_addr.net = addr->sipx_network;
1565 ipxs->dest_addr.sock = addr->sipx_port;
1566 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1567 ipxs->type = addr->sipx_type;
1569 if (sock->type == SOCK_DGRAM) {
1570 sock->state = SS_CONNECTED;
1571 sk->sk_state = TCP_ESTABLISHED;
1574 if (rt)
1575 ipxrtr_put(rt);
1576 rc = 0;
1577 out:
1578 return rc;
1582 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1583 int *uaddr_len, int peer)
1585 struct ipx_address *addr;
1586 struct sockaddr_ipx sipx;
1587 struct sock *sk = sock->sk;
1588 struct ipx_sock *ipxs = ipx_sk(sk);
1589 int rc;
1591 *uaddr_len = sizeof(struct sockaddr_ipx);
1593 if (peer) {
1594 rc = -ENOTCONN;
1595 if (sk->sk_state != TCP_ESTABLISHED)
1596 goto out;
1598 addr = &ipxs->dest_addr;
1599 sipx.sipx_network = addr->net;
1600 sipx.sipx_port = addr->sock;
1601 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1602 } else {
1603 if (ipxs->intrfc) {
1604 sipx.sipx_network = ipxs->intrfc->if_netnum;
1605 #ifdef CONFIG_IPX_INTERN
1606 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1607 #else
1608 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1609 IPX_NODE_LEN);
1610 #endif /* CONFIG_IPX_INTERN */
1612 } else {
1613 sipx.sipx_network = 0;
1614 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1617 sipx.sipx_port = ipxs->port;
1620 sipx.sipx_family = AF_IPX;
1621 sipx.sipx_type = ipxs->type;
1622 sipx.sipx_zero = 0;
1623 memcpy(uaddr, &sipx, sizeof(sipx));
1625 rc = 0;
1626 out:
1627 return rc;
1630 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1632 /* NULL here for pt means the packet was looped back */
1633 struct ipx_interface *intrfc;
1634 struct ipxhdr *ipx;
1635 u16 ipx_pktsize;
1636 int rc = 0;
1638 /* Not ours */
1639 if (skb->pkt_type == PACKET_OTHERHOST)
1640 goto drop;
1642 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1643 goto out;
1645 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1646 goto drop;
1648 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1650 /* Too small or invalid header? */
1651 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1652 !pskb_may_pull(skb, ipx_pktsize))
1653 goto drop;
1655 ipx = ipx_hdr(skb);
1656 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1657 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1658 goto drop;
1660 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1661 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1662 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1664 /* Determine what local ipx endpoint this is */
1665 intrfc = ipxitf_find_using_phys(dev, pt->type);
1666 if (!intrfc) {
1667 if (ipxcfg_auto_create_interfaces &&
1668 ntohl(IPX_SKB_CB(skb)->ipx_dest_net)) {
1669 intrfc = ipxitf_auto_create(dev, pt->type);
1670 if (intrfc)
1671 ipxitf_hold(intrfc);
1674 if (!intrfc) /* Not one of ours */
1675 /* or invalid packet for auto creation */
1676 goto drop;
1679 rc = ipxitf_rcv(intrfc, skb);
1680 ipxitf_put(intrfc);
1681 goto out;
1682 drop:
1683 kfree_skb(skb);
1684 out:
1685 return rc;
1688 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1689 struct msghdr *msg, size_t len)
1691 struct sock *sk = sock->sk;
1692 struct ipx_sock *ipxs = ipx_sk(sk);
1693 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1694 struct sockaddr_ipx local_sipx;
1695 int rc = -EINVAL;
1696 int flags = msg->msg_flags;
1698 /* Socket gets bound below anyway */
1699 /* if (sk->sk_zapped)
1700 return -EIO; */ /* Socket not bound */
1701 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1702 goto out;
1704 /* Max possible packet size limited by 16 bit pktsize in header */
1705 if (len >= 65535 - sizeof(struct ipxhdr))
1706 goto out;
1708 if (usipx) {
1709 if (!ipxs->port) {
1710 struct sockaddr_ipx uaddr;
1712 uaddr.sipx_port = 0;
1713 uaddr.sipx_network = 0;
1714 #ifdef CONFIG_IPX_INTERN
1715 rc = -ENETDOWN;
1716 if (!ipxs->intrfc)
1717 goto out; /* Someone zonked the iface */
1718 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1719 IPX_NODE_LEN);
1720 #endif
1721 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1722 sizeof(struct sockaddr_ipx));
1723 if (rc)
1724 goto out;
1727 rc = -EINVAL;
1728 if (msg->msg_namelen < sizeof(*usipx) ||
1729 usipx->sipx_family != AF_IPX)
1730 goto out;
1731 } else {
1732 rc = -ENOTCONN;
1733 if (sk->sk_state != TCP_ESTABLISHED)
1734 goto out;
1736 usipx = &local_sipx;
1737 usipx->sipx_family = AF_IPX;
1738 usipx->sipx_type = ipxs->type;
1739 usipx->sipx_port = ipxs->dest_addr.sock;
1740 usipx->sipx_network = ipxs->dest_addr.net;
1741 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1744 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1745 flags & MSG_DONTWAIT);
1746 if (rc >= 0)
1747 rc = len;
1748 out:
1749 return rc;
1753 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1754 struct msghdr *msg, size_t size, int flags)
1756 struct sock *sk = sock->sk;
1757 struct ipx_sock *ipxs = ipx_sk(sk);
1758 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1759 struct ipxhdr *ipx = NULL;
1760 struct sk_buff *skb;
1761 int copied, rc;
1763 /* put the autobinding in */
1764 if (!ipxs->port) {
1765 struct sockaddr_ipx uaddr;
1767 uaddr.sipx_port = 0;
1768 uaddr.sipx_network = 0;
1770 #ifdef CONFIG_IPX_INTERN
1771 rc = -ENETDOWN;
1772 if (!ipxs->intrfc)
1773 goto out; /* Someone zonked the iface */
1774 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1775 #endif /* CONFIG_IPX_INTERN */
1777 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1778 sizeof(struct sockaddr_ipx));
1779 if (rc)
1780 goto out;
1783 rc = -ENOTCONN;
1784 if (sock_flag(sk, SOCK_ZAPPED))
1785 goto out;
1787 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1788 flags & MSG_DONTWAIT, &rc);
1789 if (!skb)
1790 goto out;
1792 ipx = ipx_hdr(skb);
1793 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1794 if (copied > size) {
1795 copied = size;
1796 msg->msg_flags |= MSG_TRUNC;
1799 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1800 copied);
1801 if (rc)
1802 goto out_free;
1803 if (skb->tstamp.off_sec)
1804 skb_get_timestamp(skb, &sk->sk_stamp);
1806 msg->msg_namelen = sizeof(*sipx);
1808 if (sipx) {
1809 sipx->sipx_family = AF_IPX;
1810 sipx->sipx_port = ipx->ipx_source.sock;
1811 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1812 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1813 sipx->sipx_type = ipx->ipx_type;
1814 sipx->sipx_zero = 0;
1816 rc = copied;
1818 out_free:
1819 skb_free_datagram(sk, skb);
1820 out:
1821 return rc;
1825 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1827 int rc = 0;
1828 long amount = 0;
1829 struct sock *sk = sock->sk;
1830 void __user *argp = (void __user *)arg;
1832 switch (cmd) {
1833 case TIOCOUTQ:
1834 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1835 if (amount < 0)
1836 amount = 0;
1837 rc = put_user(amount, (int __user *)argp);
1838 break;
1839 case TIOCINQ: {
1840 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1841 /* These two are safe on a single CPU system as only
1842 * user tasks fiddle here */
1843 if (skb)
1844 amount = skb->len - sizeof(struct ipxhdr);
1845 rc = put_user(amount, (int __user *)argp);
1846 break;
1848 case SIOCADDRT:
1849 case SIOCDELRT:
1850 rc = -EPERM;
1851 if (capable(CAP_NET_ADMIN))
1852 rc = ipxrtr_ioctl(cmd, argp);
1853 break;
1854 case SIOCSIFADDR:
1855 case SIOCAIPXITFCRT:
1856 case SIOCAIPXPRISLT:
1857 rc = -EPERM;
1858 if (!capable(CAP_NET_ADMIN))
1859 break;
1860 case SIOCGIFADDR:
1861 rc = ipxitf_ioctl(cmd, argp);
1862 break;
1863 case SIOCIPXCFGDATA:
1864 rc = ipxcfg_get_config_data(argp);
1865 break;
1866 case SIOCIPXNCPCONN:
1867 /*
1868 * This socket wants to take care of the NCP connection
1869 * handed to us in arg.
1870 */
1871 rc = -EPERM;
1872 if (!capable(CAP_NET_ADMIN))
1873 break;
1874 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1875 (const unsigned short __user *)argp);
1876 break;
1877 case SIOCGSTAMP:
1878 rc = -EINVAL;
1879 if (sk)
1880 rc = sock_get_timestamp(sk, argp);
1881 break;
1882 case SIOCGIFDSTADDR:
1883 case SIOCSIFDSTADDR:
1884 case SIOCGIFBRDADDR:
1885 case SIOCSIFBRDADDR:
1886 case SIOCGIFNETMASK:
1887 case SIOCSIFNETMASK:
1888 rc = -EINVAL;
1889 break;
1890 default:
1891 rc = -ENOIOCTLCMD;
1892 break;
1895 return rc;
1899 #ifdef CONFIG_COMPAT
1900 static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1902 /*
1903 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1904 * commands is handled by generic ioctl code. As these commands are
1905 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1906 * code.
1907 */
1908 switch (cmd) {
1909 case SIOCAIPXITFCRT:
1910 case SIOCAIPXPRISLT:
1911 case SIOCIPXCFGDATA:
1912 case SIOCIPXNCPCONN:
1913 return ipx_ioctl(sock, cmd, arg);
1914 default:
1915 return -ENOIOCTLCMD;
1918 #endif
1921 /*
1922 * Socket family declarations
1923 */
1925 static struct net_proto_family ipx_family_ops = {
1926 .family = PF_IPX,
1927 .create = ipx_create,
1928 .owner = THIS_MODULE,
1929 };
1931 static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
1932 .family = PF_IPX,
1933 .owner = THIS_MODULE,
1934 .release = ipx_release,
1935 .bind = ipx_bind,
1936 .connect = ipx_connect,
1937 .socketpair = sock_no_socketpair,
1938 .accept = sock_no_accept,
1939 .getname = ipx_getname,
1940 .poll = datagram_poll,
1941 .ioctl = ipx_ioctl,
1942 #ifdef CONFIG_COMPAT
1943 .compat_ioctl = ipx_compat_ioctl,
1944 #endif
1945 .listen = sock_no_listen,
1946 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1947 .setsockopt = ipx_setsockopt,
1948 .getsockopt = ipx_getsockopt,
1949 .sendmsg = ipx_sendmsg,
1950 .recvmsg = ipx_recvmsg,
1951 .mmap = sock_no_mmap,
1952 .sendpage = sock_no_sendpage,
1953 };
1955 #include <linux/smp_lock.h>
1956 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
1958 static struct packet_type ipx_8023_packet_type = {
1959 .type = __constant_htons(ETH_P_802_3),
1960 .func = ipx_rcv,
1961 };
1963 static struct packet_type ipx_dix_packet_type = {
1964 .type = __constant_htons(ETH_P_IPX),
1965 .func = ipx_rcv,
1966 };
1968 static struct notifier_block ipx_dev_notifier = {
1969 .notifier_call = ipxitf_device_event,
1970 };
1972 extern struct datalink_proto *make_EII_client(void);
1973 extern void destroy_EII_client(struct datalink_proto *);
1975 static unsigned char ipx_8022_type = 0xE0;
1976 static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1977 static char ipx_EII_err_msg[] __initdata =
1978 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1979 static char ipx_8023_err_msg[] __initdata =
1980 KERN_CRIT "IPX: Unable to register with 802.3\n";
1981 static char ipx_llc_err_msg[] __initdata =
1982 KERN_CRIT "IPX: Unable to register with 802.2\n";
1983 static char ipx_snap_err_msg[] __initdata =
1984 KERN_CRIT "IPX: Unable to register with SNAP\n";
1986 static int __init ipx_init(void)
1988 int rc = proto_register(&ipx_proto, 1);
1990 if (rc != 0)
1991 goto out;
1993 sock_register(&ipx_family_ops);
1995 pEII_datalink = make_EII_client();
1996 if (pEII_datalink)
1997 dev_add_pack(&ipx_dix_packet_type);
1998 else
1999 printk(ipx_EII_err_msg);
2001 p8023_datalink = make_8023_client();
2002 if (p8023_datalink)
2003 dev_add_pack(&ipx_8023_packet_type);
2004 else
2005 printk(ipx_8023_err_msg);
2007 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2008 if (!p8022_datalink)
2009 printk(ipx_llc_err_msg);
2011 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2012 if (!pSNAP_datalink)
2013 printk(ipx_snap_err_msg);
2015 register_netdevice_notifier(&ipx_dev_notifier);
2016 ipx_register_sysctl();
2017 ipx_proc_init();
2018 out:
2019 return rc;
2022 static void __exit ipx_proto_finito(void)
2024 ipx_proc_exit();
2025 ipx_unregister_sysctl();
2027 unregister_netdevice_notifier(&ipx_dev_notifier);
2029 ipxitf_cleanup();
2031 unregister_snap_client(pSNAP_datalink);
2032 pSNAP_datalink = NULL;
2034 unregister_8022_client(p8022_datalink);
2035 p8022_datalink = NULL;
2037 dev_remove_pack(&ipx_8023_packet_type);
2038 destroy_8023_client(p8023_datalink);
2039 p8023_datalink = NULL;
2041 dev_remove_pack(&ipx_dix_packet_type);
2042 destroy_EII_client(pEII_datalink);
2043 pEII_datalink = NULL;
2045 proto_unregister(&ipx_proto);
2046 sock_unregister(ipx_family_ops.family);
2049 module_init(ipx_init);
2050 module_exit(ipx_proto_finito);
2051 MODULE_LICENSE("GPL");
2052 MODULE_ALIAS_NETPROTO(PF_IPX);