2 * Implements an IPX socket layer.
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
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.
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.
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.
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.
28 * See net/ipx/ChangeLog.
31 #include <linux/config.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/tcp.h>
48 #include <linux/types.h>
49 #include <linux/termios.h>
52 #include <net/p8022.h>
53 #include <net/psnap.h>
56 #include <asm/uaccess.h>
59 extern void ipx_register_sysctl(void);
60 extern void ipx_unregister_sysctl(void);
62 #define ipx_register_sysctl()
63 #define ipx_unregister_sysctl()
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 struct proto_ops ipx_dgram_ops;
80 LIST_HEAD(ipx_interfaces);
81 spinlock_t ipx_interfaces_lock = SPIN_LOCK_UNLOCKED;
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,
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 *arg);
95 #undef IPX_REFCNT_DEBUG
96 #ifdef IPX_REFCNT_DEBUG
100 struct ipx_interface *ipx_interfaces_head(void)
102 struct ipx_interface *rc = NULL;
104 if (!list_empty(&ipx_interfaces))
105 rc = list_entry(ipx_interfaces.next,
106 struct ipx_interface, node);
110 static void ipxcfg_set_auto_select(char val)
112 ipxcfg_auto_select_primary = val;
113 if (val && !ipx_primary_net)
114 ipx_primary_net = ipx_interfaces_head();
117 static int ipxcfg_get_config_data(struct ipx_config_data *arg)
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;
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
133 static void ipx_remove_socket(struct sock *sk)
135 /* Determine interface with which socket is associated */
136 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
142 spin_lock_bh(&intrfc->if_sklist_lock);
143 sk_del_node_init(sk);
144 spin_unlock_bh(&intrfc->if_sklist_lock);
150 static void ipx_destroy_socket(struct sock *sk)
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));
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.
170 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
172 static void ipxitf_clear_primary_net(void)
174 ipx_primary_net = NULL;
175 if (ipxcfg_auto_select_primary)
176 ipx_primary_net = ipx_interfaces_head();
179 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
180 unsigned short datalink)
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)
192 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
193 unsigned short datalink)
195 struct ipx_interface *i;
197 spin_lock_bh(&ipx_interfaces_lock);
198 i = __ipxitf_find_using_phys(dev, datalink);
201 spin_unlock_bh(&ipx_interfaces_lock);
205 struct ipx_interface *ipxitf_find_using_net(__u32 net)
207 struct ipx_interface *i;
209 spin_lock_bh(&ipx_interfaces_lock);
211 list_for_each_entry(i, &ipx_interfaces, node)
212 if (i->if_netnum == net)
223 spin_unlock_bh(&ipx_interfaces_lock);
227 /* Sockets are bound to a particular IPX interface. */
228 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
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);
238 /* caller must hold intrfc->if_sklist_lock */
239 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
243 struct hlist_node *node;
245 sk_for_each(s, node, &intrfc->if_sklist)
246 if (ipx_sk(s)->port == port)
253 /* caller must hold a reference to intrfc */
254 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
259 spin_lock_bh(&intrfc->if_sklist_lock);
260 s = __ipxitf_find_socket(intrfc, port);
263 spin_unlock_bh(&intrfc->if_sklist_lock);
268 #ifdef CONFIG_IPX_INTERN
269 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
270 unsigned char *ipx_node,
274 struct hlist_node *node;
277 spin_lock_bh(&intrfc->if_sklist_lock);
279 sk_for_each(s, node, &intrfc->if_sklist) {
280 struct ipx_opt *ipxs = ipx_sk(s);
282 if (ipxs->port == port &&
283 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
288 spin_unlock_bh(&intrfc->if_sklist_lock);
294 void __ipxitf_down(struct ipx_interface *intrfc)
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);
304 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
305 struct ipx_opt *ipxs = ipx_sk(s);
308 s->sk_error_report(s);
311 s->sk_zapped = 1; /* Indicates it is no longer bound */
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;
327 dev_put(intrfc->if_dev);
331 void ipxitf_down(struct ipx_interface *intrfc)
333 spin_lock_bh(&ipx_interfaces_lock);
334 __ipxitf_down(intrfc);
335 spin_unlock_bh(&ipx_interfaces_lock);
338 static int ipxitf_device_event(struct notifier_block *notifier,
339 unsigned long event, void *ptr)
341 struct net_device *dev = ptr;
342 struct ipx_interface *i, *tmp;
344 if (event != NETDEV_DOWN && event != NETDEV_UP)
347 spin_lock_bh(&ipx_interfaces_lock);
348 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
349 if (i->if_dev == dev) {
350 if (event == NETDEV_UP)
355 spin_unlock_bh(&ipx_interfaces_lock);
361 static __exit void ipxitf_cleanup(void)
363 struct ipx_interface *i, *tmp;
365 spin_lock_bh(&ipx_interfaces_lock);
366 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
368 spin_unlock_bh(&ipx_interfaces_lock);
371 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
373 if (sock_queue_rcv_skb(sock, skb) < 0)
378 * On input skb->sk is NULL. Nobody is charged for the memory.
381 /* caller must hold a reference to intrfc */
383 #ifdef CONFIG_IPX_INTERN
384 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
385 struct sk_buff *skb, int copy)
387 struct ipxhdr *ipx = ipx_hdr(skb);
388 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
391 struct hlist_node *node;
394 spin_lock_bh(&intrfc->if_sklist_lock);
396 sk_for_each(s, node, &intrfc->if_sklist) {
397 struct ipx_opt *ipxs = ipx_sk(s);
399 if (ipxs->port == ipx->ipx_dest.sock &&
400 (is_broadcast || !memcmp(ipx->ipx_dest.node,
401 ipxs->node, IPX_NODE_LEN))) {
402 /* We found a socket to which to send */
403 struct sk_buff *skb1;
406 skb1 = skb_clone(skb, GFP_ATOMIC);
412 copy = 1; /* skb may only be used once */
414 ipxitf_def_skb_handler(s, skb1);
416 /* On an external interface, one socket can listen */
417 if (intrfc != ipx_internal_net)
422 /* skb was solely for us, and we did not make a copy, so free it. */
428 spin_unlock_bh(&intrfc->if_sklist_lock);
432 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
435 /* The packet's target is a NCP connection handler. We want to hand it
436 * to the correct socket directly within the kernel, so that the
437 * mars_nwe packet distribution process does not have to do it. Here we
438 * only care about NCP and BURST packets.
440 * You might call this a hack, but believe me, you do not want a
441 * complete NCP layer in the kernel, and this is VERY fast as well. */
442 struct sock *sk = NULL;
444 u8 *ncphdr = (u8 *)(ipx + 1);
446 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
447 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
448 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
449 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
452 struct hlist_node *node;
453 /* Now we have to look for a special NCP connection handling
454 * socket. Only these sockets have ipx_ncp_conn != 0, set by
456 spin_lock_bh(&intrfc->if_sklist_lock);
457 sk_for_each(sk, node, &intrfc->if_sklist)
458 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
464 spin_unlock_bh(&intrfc->if_sklist_lock);
469 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
470 struct sk_buff *skb, int copy)
472 struct ipxhdr *ipx = ipx_hdr(skb);
473 struct sock *sock1 = NULL, *sock2 = NULL;
474 struct sk_buff *skb1 = NULL, *skb2 = NULL;
477 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
478 sock1 = ncp_connection_hack(intrfc, ipx);
480 /* No special socket found, forward the packet the normal way */
481 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
484 * We need to check if there is a primary net and if
485 * this is addressed to one of the *SPECIAL* sockets because
486 * these need to be propagated to the primary net.
487 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
491 if (ipx_primary_net && intrfc != ipx_primary_net) {
492 const int dsock = ntohs(ipx->ipx_dest.sock);
494 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
495 /* The appropriate thing to do here is to dup the
496 * packet and route to the primary net interface via
497 * ipxitf_send; however, we'll cheat and just demux it
499 sock2 = ipxitf_find_socket(ipx_primary_net,
504 * If there is nothing to do return. The kfree will cancel any charging.
507 if (!sock1 && !sock2) {
514 * This next segment of code is a little awkward, but it sets it up
515 * so that the appropriate number of copies of the SKB are made and
516 * that skb1 and skb2 point to it (them) so that it (they) can be
517 * demuxed to sock1 and/or sock2. If we are unable to make enough
518 * copies, we do as much as is possible.
522 skb1 = skb_clone(skb, GFP_ATOMIC);
530 /* Do we need 2 SKBs? */
532 skb2 = skb_clone(skb1, GFP_ATOMIC);
537 ipxitf_def_skb_handler(sock1, skb1);
543 ipxitf_def_skb_handler(sock2, skb2);
554 #endif /* CONFIG_IPX_INTERN */
556 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
559 struct sk_buff *skb2;
560 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
561 int out_offset = intrfc->if_ipx_offset;
564 /* Hopefully, most cases */
565 if (in_offset >= out_offset)
569 len = skb->len + out_offset;
570 skb2 = alloc_skb(len, GFP_ATOMIC);
572 skb_reserve(skb2, out_offset);
573 skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len);
574 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
575 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
581 /* caller must hold a reference to intrfc and the skb has to be unshared */
582 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
584 struct ipxhdr *ipx = ipx_hdr(skb);
585 struct net_device *dev = intrfc->if_dev;
586 struct datalink_proto *dl = intrfc->if_dlink;
587 char dest_node[IPX_NODE_LEN];
588 int send_to_wire = 1;
591 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
592 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
593 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
595 /* see if we need to include the netnum in the route list */
596 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
597 u32 *last_hop = (u32 *)(((u8 *) skb->data) +
598 sizeof(struct ipxhdr) +
599 IPX_SKB_CB(skb)->last_hop.index *
601 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
602 IPX_SKB_CB(skb)->last_hop.index = -1;
606 * We need to know how many skbuffs it will take to send out this
607 * packet to avoid unnecessary copies.
610 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
611 send_to_wire = 0; /* No non looped */
614 * See if this should be demuxed to sockets on this interface
616 * We want to ensure the original was eaten or that we only use
620 if (ipx->ipx_dest.net == intrfc->if_netnum) {
622 * To our own node, loop and free the original.
623 * The internal net will receive on all node address.
625 if (intrfc == ipx_internal_net ||
626 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
627 /* Don't charge sender */
630 /* Will charge receiver */
631 return ipxitf_demux_socket(intrfc, skb, 0);
634 /* Broadcast, loop and possibly keep to send on. */
635 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
638 ipxitf_demux_socket(intrfc, skb, send_to_wire);
645 * If the originating net is not equal to our net; this is routed
646 * We are still charging the sender. Which is right - the driver
647 * free will handle this fairly.
649 if (ipx->ipx_source.net != intrfc->if_netnum) {
651 * Unshare the buffer before modifying the count in
652 * case it's a flood or tcpdump
654 skb = skb_unshare(skb, GFP_ATOMIC);
657 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
666 /* Determine the appropriate hardware address */
667 addr_len = dev->addr_len;
668 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
669 memcpy(dest_node, dev->broadcast, addr_len);
671 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
673 /* Make any compensation for differing physical/data link size */
674 skb = ipxitf_adjust_skbuff(intrfc, skb);
678 /* set up data link and physical headers */
680 skb->protocol = htons(ETH_P_IPX);
683 dl->request(dl, skb, dest_node);
688 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
690 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
693 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
694 struct sk_buff *skb);
695 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
697 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
699 struct ipxhdr *ipx = ipx_hdr(skb);
704 /* See if we should update our network number */
705 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
706 ipxitf_discover_netnum(intrfc, skb);
708 IPX_SKB_CB(skb)->last_hop.index = -1;
709 if (ipx->ipx_type == IPX_TYPE_PPROP) {
710 rc = ipxitf_pprop(intrfc, skb);
715 /* local processing follows */
716 if (!IPX_SKB_CB(skb)->ipx_dest_net)
717 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
718 if (!IPX_SKB_CB(skb)->ipx_source_net)
719 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
721 /* it doesn't make sense to route a pprop packet, there's no meaning
722 * in the ipx_dest_net for such packets */
723 if (ipx->ipx_type != IPX_TYPE_PPROP &&
724 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
725 /* We only route point-to-point packets. */
726 if (skb->pkt_type == PACKET_HOST) {
727 skb = skb_unshare(skb, GFP_ATOMIC);
729 rc = ipxrtr_route_skb(skb);
736 /* see if we should keep it */
737 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
738 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
739 rc = ipxitf_demux_socket(intrfc, skb, 0);
743 /* we couldn't pawn it off so unload it */
751 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
754 const struct ipx_cb *cb = IPX_SKB_CB(skb);
756 /* see if this is an intra packet: source_net == dest_net */
757 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
758 struct ipx_interface *i =
759 ipxitf_find_using_net(cb->ipx_source_net);
760 /* NB: NetWare servers lie about their hop count so we
761 * dropped the test based on it. This is the best way
762 * to determine this is a 0 hop count packet. */
764 intrfc->if_netnum = cb->ipx_source_net;
765 ipxitf_add_local_route(intrfc);
767 printk(KERN_WARNING "IPX: Network number collision "
768 "%lx\n %s %s and %s %s\n",
769 (unsigned long) htonl(cb->ipx_source_net),
771 ipx_frame_name(i->if_dlink_type),
772 ipx_device_name(intrfc),
773 ipx_frame_name(intrfc->if_dlink_type));
780 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
782 * @intrfc: IPX interface receiving this packet
783 * @skb: Received packet
785 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
786 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
787 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
788 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
789 * RIP and SAP Router Specification", Part Number 107-000029-001.
791 * If it is valid, check if we have pprop broadcasting enabled by the user,
792 * if not, just return zero for local processing.
794 * If it is enabled check the packet and don't broadcast it if we have already
797 * Broadcast: send it to the interfaces that aren't on the packet visited nets
798 * array, just after the IPX header.
800 * Returns -EINVAL for invalid packets, so that the calling function drops
801 * the packet without local processing. 0 if packet is to be locally processed.
803 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
805 struct ipxhdr *ipx = ipx_hdr(skb);
807 struct ipx_interface *ifcs;
811 /* Illegal packet - too many hops or too short */
812 /* We decide to throw it away: no broadcasting, no local processing.
813 * NetBIOS unaware implementations route them as normal packets -
814 * tctrl <= 15, any data payload... */
815 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
816 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
817 IPX_MAX_PPROP_HOPS * sizeof(u32))
819 /* are we broadcasting this damn thing? */
821 if (!sysctl_ipx_pprop_broadcasting)
823 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
824 * process it locally. All previous hops broadcasted it, and process it
826 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
829 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
832 /* Don't broadcast packet if already seen this net */
833 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
834 if (*l++ == intrfc->if_netnum)
837 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
838 * position where we will insert recvd netnum into list, later on,
840 IPX_SKB_CB(skb)->last_hop.index = i;
841 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
842 /* xmit on all other interfaces... */
843 spin_lock_bh(&ipx_interfaces_lock);
844 list_for_each_entry(ifcs, &ipx_interfaces, node) {
845 /* Except unconfigured interfaces */
846 if (!ifcs->if_netnum)
849 /* That aren't in the list */
853 /* don't consider the last entry in the packet list,
854 * it is our netnum, and it is not there yet */
855 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
856 if (ifcs->if_netnum == *l++)
858 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
859 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
862 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
867 spin_unlock_bh(&ipx_interfaces_lock);
872 static void ipxitf_insert(struct ipx_interface *intrfc)
874 spin_lock_bh(&ipx_interfaces_lock);
875 list_add_tail(&intrfc->node, &ipx_interfaces);
876 spin_unlock_bh(&ipx_interfaces_lock);
878 if (ipxcfg_auto_select_primary && !ipx_primary_net)
879 ipx_primary_net = intrfc;
882 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum,
883 unsigned short dlink_type,
884 struct datalink_proto *dlink,
885 unsigned char internal,
888 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
891 intrfc->if_dev = dev;
892 intrfc->if_netnum = netnum;
893 intrfc->if_dlink_type = dlink_type;
894 intrfc->if_dlink = dlink;
895 intrfc->if_internal = internal;
896 intrfc->if_ipx_offset = ipx_offset;
897 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
898 INIT_HLIST_HEAD(&intrfc->if_sklist);
899 atomic_set(&intrfc->refcnt, 1);
900 spin_lock_init(&intrfc->if_sklist_lock);
906 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
908 struct ipx_interface *intrfc;
911 /* Only one primary network allowed */
915 /* Must have a valid network number */
917 if (!idef->ipx_network)
919 intrfc = ipxitf_find_using_net(idef->ipx_network);
925 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
929 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
930 ipx_internal_net = ipx_primary_net = intrfc;
932 ipxitf_insert(intrfc);
934 rc = ipxitf_add_local_route(intrfc);
940 static int ipx_map_frame_type(unsigned char type)
945 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
946 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
947 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
948 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
954 static int ipxitf_create(struct ipx_interface_definition *idef)
956 struct net_device *dev;
957 unsigned short dlink_type = 0;
958 struct datalink_proto *datalink = NULL;
959 struct ipx_interface *intrfc;
962 if (idef->ipx_special == IPX_INTERNAL) {
963 rc = ipxitf_create_internal(idef);
968 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
971 intrfc = ipxitf_find_using_net(idef->ipx_network);
973 if (idef->ipx_network && intrfc) {
981 dev = dev_get_by_name(idef->ipx_device);
986 switch (idef->ipx_dlink_type) {
987 case IPX_FRAME_TR_8022:
988 printk(KERN_WARNING "IPX frame type 802.2TR is "
989 "obsolete Use 802.2 instead.\n");
992 dlink_type = htons(ETH_P_802_2);
993 datalink = p8022_datalink;
995 case IPX_FRAME_ETHERII:
996 if (dev->type != ARPHRD_IEEE802) {
997 dlink_type = htons(ETH_P_IPX);
998 datalink = pEII_datalink;
1001 printk(KERN_WARNING "IPX frame type EtherII over "
1002 "token-ring is obsolete. Use SNAP "
1005 case IPX_FRAME_SNAP:
1006 dlink_type = htons(ETH_P_SNAP);
1007 datalink = pSNAP_datalink;
1009 case IPX_FRAME_8023:
1010 dlink_type = htons(ETH_P_802_3);
1011 datalink = p8023_datalink;
1013 case IPX_FRAME_NONE:
1015 rc = -EPROTONOSUPPORT;
1020 if (!(dev->flags & IFF_UP))
1023 /* Check addresses are suitable */
1025 if (dev->addr_len > IPX_NODE_LEN)
1028 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1031 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1032 datalink, 0, dev->hard_header_len +
1033 datalink->header_length);
1037 /* Setup primary if necessary */
1038 if (idef->ipx_special == IPX_PRIMARY)
1039 ipx_primary_net = intrfc;
1040 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1042 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1043 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1044 dev->dev_addr, dev->addr_len);
1046 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1047 ipxitf_hold(intrfc);
1048 ipxitf_insert(intrfc);
1052 /* If the network number is known, add a route */
1054 if (!intrfc->if_netnum)
1057 rc = ipxitf_add_local_route(intrfc);
1067 static int ipxitf_delete(struct ipx_interface_definition *idef)
1069 struct net_device *dev = NULL;
1070 unsigned short dlink_type = 0;
1071 struct ipx_interface *intrfc;
1074 spin_lock_bh(&ipx_interfaces_lock);
1075 if (idef->ipx_special == IPX_INTERNAL) {
1076 if (ipx_internal_net) {
1077 __ipxitf_put(ipx_internal_net);
1084 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1085 rc = -EPROTONOSUPPORT;
1089 dev = __dev_get_by_name(idef->ipx_device);
1094 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1098 __ipxitf_put(intrfc);
1102 spin_unlock_bh(&ipx_interfaces_lock);
1106 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1107 unsigned short dlink_type)
1109 struct ipx_interface *intrfc = NULL;
1110 struct datalink_proto *datalink;
1115 /* Check addresses are suitable */
1116 if (dev->addr_len > IPX_NODE_LEN)
1119 switch (htons(dlink_type)) {
1120 case ETH_P_IPX: datalink = pEII_datalink; break;
1121 case ETH_P_802_2: datalink = p8022_datalink; break;
1122 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1123 case ETH_P_802_3: datalink = p8023_datalink; break;
1127 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1128 dev->hard_header_len + datalink->header_length);
1131 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1132 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1133 dev->dev_addr, dev->addr_len);
1134 spin_lock_init(&intrfc->if_sklist_lock);
1135 atomic_set(&intrfc->refcnt, 1);
1136 ipxitf_insert(intrfc);
1144 static int ipxitf_ioctl(unsigned int cmd, void *arg)
1152 struct sockaddr_ipx *sipx;
1153 struct ipx_interface_definition f;
1156 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1158 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1160 if (sipx->sipx_family != AF_IPX)
1162 f.ipx_network = sipx->sipx_network;
1163 memcpy(f.ipx_device, ifr.ifr_name,
1164 sizeof(f.ipx_device));
1165 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1166 f.ipx_dlink_type = sipx->sipx_type;
1167 f.ipx_special = sipx->sipx_special;
1169 if (sipx->sipx_action == IPX_DLTITF)
1170 rc = ipxitf_delete(&f);
1172 rc = ipxitf_create(&f);
1176 struct sockaddr_ipx *sipx;
1177 struct ipx_interface *ipxif;
1178 struct net_device *dev;
1181 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1183 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1184 dev = __dev_get_by_name(ifr.ifr_name);
1188 ipxif = ipxitf_find_using_phys(dev,
1189 ipx_map_frame_type(sipx->sipx_type));
1190 rc = -EADDRNOTAVAIL;
1194 sipx->sipx_family = AF_IPX;
1195 sipx->sipx_network = ipxif->if_netnum;
1196 memcpy(sipx->sipx_node, ipxif->if_node,
1197 sizeof(sipx->sipx_node));
1199 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1205 case SIOCAIPXITFCRT:
1207 if (get_user(val, (unsigned char *) arg))
1210 ipxcfg_auto_create_interfaces = val;
1212 case SIOCAIPXPRISLT:
1214 if (get_user(val, (unsigned char *) arg))
1217 ipxcfg_set_auto_select(val);
1225 * Checksum routine for IPX
1228 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1229 /* This functions should *not* mess with packet contents */
1231 __u16 ipx_cksum(struct ipxhdr *packet, int length)
1234 * NOTE: sum is a net byte order quantity, which optimizes the
1235 * loop. This only works on big and little endian machines. (I
1236 * don't know of a machine that isn't.)
1238 /* start at ipx_dest - We skip the checksum field and start with
1239 * ipx_type before the loop, not considering ipx_tctrl in the calc */
1240 __u16 *p = (__u16 *)&packet->ipx_dest;
1241 __u32 i = (length >> 1) - 1; /* Number of complete words */
1242 __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl);
1244 /* Loop through all complete words except the checksum field,
1245 * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */
1249 /* Add on the last part word if it exists */
1250 if (packet->ipx_pktsize & htons(1))
1251 sum += ntohs(0xff00) & *p;
1253 /* Do final fixup */
1254 sum = (sum & 0xffff) + (sum >> 16);
1256 /* It's a pity there's no concept of carry in C */
1263 const char *ipx_frame_name(unsigned short frame)
1267 switch (ntohs(frame)) {
1268 case ETH_P_IPX: rc = "EtherII"; break;
1269 case ETH_P_802_2: rc = "802.2"; break;
1270 case ETH_P_SNAP: rc = "SNAP"; break;
1271 case ETH_P_802_3: rc = "802.3"; break;
1272 case ETH_P_TR_802_2: rc = "802.2TR"; break;
1278 const char *ipx_device_name(struct ipx_interface *intrfc)
1280 return intrfc->if_internal ? "Internal" :
1281 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1284 /* Handling for system calls applied via the various interfaces to an IPX
1287 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1288 char __user *optval, int optlen)
1290 struct sock *sk = sock->sk;
1294 if (optlen != sizeof(int))
1298 if (get_user(opt, (unsigned int __user *)optval))
1302 if (!(level == SOL_IPX && optname == IPX_TYPE))
1305 ipx_sk(sk)->type = opt;
1311 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1312 char __user *optval, int __user *optlen)
1314 struct sock *sk = sock->sk;
1317 int rc = -ENOPROTOOPT;
1319 if (!(level == SOL_IPX && optname == IPX_TYPE))
1322 val = ipx_sk(sk)->type;
1325 if (get_user(len, optlen))
1328 len = min_t(unsigned int, len, sizeof(int));
1334 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1342 static int ipx_create(struct socket *sock, int protocol)
1344 int rc = -ESOCKTNOSUPPORT;
1345 struct ipx_opt *ipx = NULL;
1348 switch (sock->type) {
1350 sk = sk_alloc(PF_IPX, GFP_KERNEL, 1, NULL);
1354 ipx = sk->sk_protinfo = kmalloc(sizeof(*ipx), GFP_KERNEL);
1357 memset(ipx, 0, sizeof(*ipx));
1358 sock->ops = &ipx_dgram_ops;
1360 case SOCK_SEQPACKET:
1362 * SPX support is not anymore in the kernel sources. If
1363 * you want to ressurrect it, completing it and making
1364 * it understand shared skbs, be fully multithreaded,
1365 * etc, grab the sources in an early 2.5 kernel tree.
1367 case SOCK_STREAM: /* Allow higher levels to piggyback */
1371 #ifdef IPX_REFCNT_DEBUG
1372 atomic_inc(&ipx_sock_nr);
1373 printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
1374 atomic_read(&ipx_sock_nr));
1376 sock_init_data(sock, sk);
1377 sk_set_owner(sk, THIS_MODULE);
1378 sk->sk_no_check = 1; /* Checksum off by default */
1387 static int ipx_release(struct socket *sock)
1389 struct sock *sk = sock->sk;
1394 if (!sock_flag(sk, SOCK_DEAD))
1395 sk->sk_state_change(sk);
1397 sock_set_flag(sk, SOCK_DEAD);
1399 ipx_destroy_socket(sk);
1404 /* caller must hold a reference to intrfc */
1406 static unsigned short ipx_first_free_socketnum(struct ipx_interface *intrfc)
1408 unsigned short socketNum = intrfc->if_sknum;
1410 spin_lock_bh(&intrfc->if_sklist_lock);
1412 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1413 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1415 while (__ipxitf_find_socket(intrfc, ntohs(socketNum)))
1416 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1417 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1421 spin_unlock_bh(&intrfc->if_sklist_lock);
1422 intrfc->if_sknum = socketNum;
1424 return ntohs(socketNum);
1427 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1429 struct sock *sk = sock->sk;
1430 struct ipx_opt *ipxs = ipx_sk(sk);
1431 struct ipx_interface *intrfc;
1432 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1435 if (!sk->sk_zapped || addr_len != sizeof(struct sockaddr_ipx))
1438 intrfc = ipxitf_find_using_net(addr->sipx_network);
1439 rc = -EADDRNOTAVAIL;
1443 if (!addr->sipx_port) {
1444 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1446 if (!addr->sipx_port)
1450 /* protect IPX system stuff like routing/sap */
1452 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1453 !capable(CAP_NET_ADMIN))
1456 ipxs->port = addr->sipx_port;
1458 #ifdef CONFIG_IPX_INTERN
1459 if (intrfc == ipx_internal_net) {
1460 /* The source address is to be set explicitly if the
1461 * socket is to be bound on the internal network. If a
1462 * node number 0 was specified, the default is used.
1466 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1468 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1469 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1471 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1474 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1477 "IPX: bind failed because port %X in use.\n",
1478 ntohs((int)addr->sipx_port));
1482 /* Source addresses are easy. It must be our
1483 * network:node pair for an interface routed to IPX
1484 * with the ipx routing ioctl()
1487 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1490 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1492 "IPX: bind failed because port %X in use.\n",
1493 ntohs((int)addr->sipx_port));
1498 #else /* !def CONFIG_IPX_INTERN */
1500 /* Source addresses are easy. It must be our network:node pair for
1501 an interface routed to IPX with the ipx routing ioctl() */
1504 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1505 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1506 ntohs((int)addr->sipx_port));
1510 #endif /* CONFIG_IPX_INTERN */
1512 ipxitf_insert_socket(intrfc, sk);
1522 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1523 int addr_len, int flags)
1525 struct sock *sk = sock->sk;
1526 struct ipx_opt *ipxs = ipx_sk(sk);
1527 struct sockaddr_ipx *addr;
1529 struct ipx_route *rt;
1531 sk->sk_state = TCP_CLOSE;
1532 sock->state = SS_UNCONNECTED;
1534 if (addr_len != sizeof(*addr))
1536 addr = (struct sockaddr_ipx *)uaddr;
1538 /* put the autobinding in */
1540 struct sockaddr_ipx uaddr;
1542 uaddr.sipx_port = 0;
1543 uaddr.sipx_network = 0;
1545 #ifdef CONFIG_IPX_INTERN
1548 goto out; /* Someone zonked the iface */
1549 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1551 #endif /* CONFIG_IPX_INTERN */
1553 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1554 sizeof(struct sockaddr_ipx));
1559 /* We can either connect to primary network or somewhere
1560 * we can route to */
1561 rt = ipxrtr_lookup(addr->sipx_network);
1563 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1566 ipxs->dest_addr.net = addr->sipx_network;
1567 ipxs->dest_addr.sock = addr->sipx_port;
1568 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1569 ipxs->type = addr->sipx_type;
1571 if (sock->type == SOCK_DGRAM) {
1572 sock->state = SS_CONNECTED;
1573 sk->sk_state = TCP_ESTABLISHED;
1584 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1585 int *uaddr_len, int peer)
1587 struct ipx_address *addr;
1588 struct sockaddr_ipx sipx;
1589 struct sock *sk = sock->sk;
1590 struct ipx_opt *ipxs = ipx_sk(sk);
1593 *uaddr_len = sizeof(struct sockaddr_ipx);
1597 if (sk->sk_state != TCP_ESTABLISHED)
1600 addr = &ipxs->dest_addr;
1601 sipx.sipx_network = addr->net;
1602 sipx.sipx_port = addr->sock;
1603 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1606 sipx.sipx_network = ipxs->intrfc->if_netnum;
1607 #ifdef CONFIG_IPX_INTERN
1608 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1610 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1612 #endif /* CONFIG_IPX_INTERN */
1615 sipx.sipx_network = 0;
1616 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1619 sipx.sipx_port = ipxs->port;
1622 sipx.sipx_family = AF_IPX;
1623 sipx.sipx_type = ipxs->type;
1624 memcpy(uaddr, &sipx, sizeof(sipx));
1631 int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
1633 /* NULL here for pt means the packet was looped back */
1634 struct ipx_interface *intrfc;
1640 if (skb->pkt_type == PACKET_OTHERHOST)
1643 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1647 ipx_pktsize = ntohs(ipx->ipx_pktsize);
1649 /* Too small or invalid header? */
1650 if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len)
1653 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1654 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1657 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1658 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1659 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1661 /* Determine what local ipx endpoint this is */
1662 intrfc = ipxitf_find_using_phys(dev, pt->type);
1664 if (ipxcfg_auto_create_interfaces &&
1665 ntohl(IPX_SKB_CB(skb)->ipx_dest_net)) {
1666 intrfc = ipxitf_auto_create(dev, pt->type);
1668 ipxitf_hold(intrfc);
1671 if (!intrfc) /* Not one of ours */
1672 /* or invalid packet for auto creation */
1676 rc = ipxitf_rcv(intrfc, skb);
1685 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1686 struct msghdr *msg, size_t len)
1688 struct sock *sk = sock->sk;
1689 struct ipx_opt *ipxs = ipx_sk(sk);
1690 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1691 struct sockaddr_ipx local_sipx;
1693 int flags = msg->msg_flags;
1695 /* Socket gets bound below anyway */
1696 /* if (sk->sk_zapped)
1697 return -EIO; */ /* Socket not bound */
1698 if (flags & ~MSG_DONTWAIT)
1701 /* Max possible packet size limited by 16 bit pktsize in header */
1702 if (len >= 65535 - sizeof(struct ipxhdr))
1707 struct sockaddr_ipx uaddr;
1709 uaddr.sipx_port = 0;
1710 uaddr.sipx_network = 0;
1711 #ifdef CONFIG_IPX_INTERN
1714 goto out; /* Someone zonked the iface */
1715 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1718 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1719 sizeof(struct sockaddr_ipx));
1725 if (msg->msg_namelen < sizeof(*usipx) ||
1726 usipx->sipx_family != AF_IPX)
1730 if (sk->sk_state != TCP_ESTABLISHED)
1733 usipx = &local_sipx;
1734 usipx->sipx_family = AF_IPX;
1735 usipx->sipx_type = ipxs->type;
1736 usipx->sipx_port = ipxs->dest_addr.sock;
1737 usipx->sipx_network = ipxs->dest_addr.net;
1738 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1741 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1742 flags & MSG_DONTWAIT);
1750 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1751 struct msghdr *msg, size_t size, int flags)
1753 struct sock *sk = sock->sk;
1754 struct ipx_opt *ipxs = ipx_sk(sk);
1755 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1756 struct ipxhdr *ipx = NULL;
1757 struct sk_buff *skb;
1760 /* put the autobinding in */
1762 struct sockaddr_ipx uaddr;
1764 uaddr.sipx_port = 0;
1765 uaddr.sipx_network = 0;
1767 #ifdef CONFIG_IPX_INTERN
1770 goto out; /* Someone zonked the iface */
1771 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1772 #endif /* CONFIG_IPX_INTERN */
1774 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1775 sizeof(struct sockaddr_ipx));
1784 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1785 flags & MSG_DONTWAIT, &rc);
1790 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1791 if (copied > size) {
1793 msg->msg_flags |= MSG_TRUNC;
1796 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1800 if (skb->stamp.tv_sec)
1801 sk->sk_stamp = skb->stamp;
1803 msg->msg_namelen = sizeof(*sipx);
1806 sipx->sipx_family = AF_IPX;
1807 sipx->sipx_port = ipx->ipx_source.sock;
1808 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1809 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1810 sipx->sipx_type = ipx->ipx_type;
1815 skb_free_datagram(sk, skb);
1821 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1825 struct sock *sk = sock->sk;
1829 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1832 rc = put_user(amount, (int *)arg);
1835 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1836 /* These two are safe on a single CPU system as only
1837 * user tasks fiddle here */
1839 amount = skb->len - sizeof(struct ipxhdr);
1840 rc = put_user(amount, (int *)arg);
1846 if (capable(CAP_NET_ADMIN))
1847 rc = ipxrtr_ioctl(cmd, (void *)arg);
1850 case SIOCAIPXITFCRT:
1851 case SIOCAIPXPRISLT:
1853 if (!capable(CAP_NET_ADMIN))
1856 rc = ipxitf_ioctl(cmd, (void *)arg);
1858 case SIOCIPXCFGDATA:
1859 rc = ipxcfg_get_config_data((void *)arg);
1861 case SIOCIPXNCPCONN:
1863 * This socket wants to take care of the NCP connection
1864 * handed to us in arg.
1867 if (!capable(CAP_NET_ADMIN))
1869 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1870 (const unsigned short *)(arg));
1875 rc = sock_get_timestamp(sk, (struct timeval __user *)arg);
1877 case SIOCGIFDSTADDR:
1878 case SIOCSIFDSTADDR:
1879 case SIOCGIFBRDADDR:
1880 case SIOCSIFBRDADDR:
1881 case SIOCGIFNETMASK:
1882 case SIOCSIFNETMASK:
1886 rc = dev_ioctl(cmd,(void __user *) arg);
1894 * Socket family declarations
1897 static struct net_proto_family ipx_family_ops = {
1899 .create = ipx_create,
1900 .owner = THIS_MODULE,
1903 static struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
1905 .owner = THIS_MODULE,
1906 .release = ipx_release,
1908 .connect = ipx_connect,
1909 .socketpair = sock_no_socketpair,
1910 .accept = sock_no_accept,
1911 .getname = ipx_getname,
1912 .poll = datagram_poll,
1914 .listen = sock_no_listen,
1915 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1916 .setsockopt = ipx_setsockopt,
1917 .getsockopt = ipx_getsockopt,
1918 .sendmsg = ipx_sendmsg,
1919 .recvmsg = ipx_recvmsg,
1920 .mmap = sock_no_mmap,
1921 .sendpage = sock_no_sendpage,
1924 #include <linux/smp_lock.h>
1925 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
1927 static struct packet_type ipx_8023_packet_type = {
1928 .type = __constant_htons(ETH_P_802_3),
1932 static struct packet_type ipx_dix_packet_type = {
1933 .type = __constant_htons(ETH_P_IPX),
1937 static struct notifier_block ipx_dev_notifier = {
1938 .notifier_call = ipxitf_device_event,
1941 extern struct datalink_proto *make_EII_client(void);
1942 extern struct datalink_proto *make_8023_client(void);
1943 extern void destroy_EII_client(struct datalink_proto *);
1944 extern void destroy_8023_client(struct datalink_proto *);
1946 static unsigned char ipx_8022_type = 0xE0;
1947 static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1948 static char ipx_EII_err_msg[] __initdata =
1949 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1950 static char ipx_8023_err_msg[] __initdata =
1951 KERN_CRIT "IPX: Unable to register with 802.3\n";
1952 static char ipx_llc_err_msg[] __initdata =
1953 KERN_CRIT "IPX: Unable to register with 802.2\n";
1954 static char ipx_snap_err_msg[] __initdata =
1955 KERN_CRIT "IPX: Unable to register with SNAP\n";
1957 static int __init ipx_init(void)
1959 sock_register(&ipx_family_ops);
1961 pEII_datalink = make_EII_client();
1963 dev_add_pack(&ipx_dix_packet_type);
1965 printk(ipx_EII_err_msg);
1967 p8023_datalink = make_8023_client();
1969 dev_add_pack(&ipx_8023_packet_type);
1971 printk(ipx_8023_err_msg);
1973 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
1974 if (!p8022_datalink)
1975 printk(ipx_llc_err_msg);
1977 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
1978 if (!pSNAP_datalink)
1979 printk(ipx_snap_err_msg);
1981 register_netdevice_notifier(&ipx_dev_notifier);
1982 ipx_register_sysctl();
1987 static void __exit ipx_proto_finito(void)
1990 ipx_unregister_sysctl();
1992 unregister_netdevice_notifier(&ipx_dev_notifier);
1996 unregister_snap_client(pSNAP_datalink);
1997 pSNAP_datalink = NULL;
1999 unregister_8022_client(p8022_datalink);
2000 p8022_datalink = NULL;
2002 dev_remove_pack(&ipx_8023_packet_type);
2003 destroy_8023_client(p8023_datalink);
2004 p8023_datalink = NULL;
2006 dev_remove_pack(&ipx_dix_packet_type);
2007 destroy_EII_client(pEII_datalink);
2008 pEII_datalink = NULL;
2010 sock_unregister(ipx_family_ops.family);
2013 module_init(ipx_init);
2014 module_exit(ipx_proto_finito);
2015 MODULE_LICENSE("GPL");
2016 MODULE_ALIAS_NETPROTO(PF_IPX);