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/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/slab.h>
44 #include <linux/skbuff.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/string.h>
48 #include <linux/types.h>
49 #include <linux/termios.h>
52 #include <net/p8022.h>
53 #include <net/psnap.h>
55 #include <net/tcp_states.h>
57 #include <asm/uaccess.h>
60 extern void ipx_register_sysctl(void);
61 extern void ipx_unregister_sysctl(void);
63 #define ipx_register_sysctl()
64 #define ipx_unregister_sysctl()
67 /* Configuration Variables */
68 static unsigned char ipxcfg_max_hops = 16;
69 static char ipxcfg_auto_select_primary;
70 static char ipxcfg_auto_create_interfaces;
71 int sysctl_ipx_pprop_broadcasting = 1;
73 /* Global Variables */
74 static struct datalink_proto *p8022_datalink;
75 static struct datalink_proto *pEII_datalink;
76 static struct datalink_proto *p8023_datalink;
77 static struct datalink_proto *pSNAP_datalink;
79 static const struct proto_ops ipx_dgram_ops;
81 LIST_HEAD(ipx_interfaces);
82 DEFINE_SPINLOCK(ipx_interfaces_lock);
84 struct ipx_interface *ipx_primary_net;
85 struct ipx_interface *ipx_internal_net;
87 struct ipx_interface *ipx_interfaces_head(void)
89 struct ipx_interface *rc = NULL;
91 if (!list_empty(&ipx_interfaces))
92 rc = list_entry(ipx_interfaces.next,
93 struct ipx_interface, node);
97 static void ipxcfg_set_auto_select(char val)
99 ipxcfg_auto_select_primary = val;
100 if (val && !ipx_primary_net)
101 ipx_primary_net = ipx_interfaces_head();
104 static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
106 struct ipx_config_data vals;
108 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
109 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
111 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
115 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
116 * handler using this technique. They can be added although we do not
120 static void ipx_remove_socket(struct sock *sk)
122 /* Determine interface with which socket is associated */
123 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
129 spin_lock_bh(&intrfc->if_sklist_lock);
130 sk_del_node_init(sk);
131 spin_unlock_bh(&intrfc->if_sklist_lock);
137 static void ipx_destroy_socket(struct sock *sk)
139 ipx_remove_socket(sk);
140 skb_queue_purge(&sk->sk_receive_queue);
141 sk_refcnt_debug_dec(sk);
145 * The following code is used to support IPX Interfaces (IPXITF). An
146 * IPX interface is defined by a physical device and a frame type.
149 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
151 static void ipxitf_clear_primary_net(void)
153 ipx_primary_net = NULL;
154 if (ipxcfg_auto_select_primary)
155 ipx_primary_net = ipx_interfaces_head();
158 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
161 struct ipx_interface *i;
163 list_for_each_entry(i, &ipx_interfaces, node)
164 if (i->if_dev == dev && i->if_dlink_type == datalink)
171 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
174 struct ipx_interface *i;
176 spin_lock_bh(&ipx_interfaces_lock);
177 i = __ipxitf_find_using_phys(dev, datalink);
180 spin_unlock_bh(&ipx_interfaces_lock);
184 struct ipx_interface *ipxitf_find_using_net(__be32 net)
186 struct ipx_interface *i;
188 spin_lock_bh(&ipx_interfaces_lock);
190 list_for_each_entry(i, &ipx_interfaces, node)
191 if (i->if_netnum == net)
202 spin_unlock_bh(&ipx_interfaces_lock);
206 /* Sockets are bound to a particular IPX interface. */
207 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
210 spin_lock_bh(&intrfc->if_sklist_lock);
211 ipx_sk(sk)->intrfc = intrfc;
212 sk_add_node(sk, &intrfc->if_sklist);
213 spin_unlock_bh(&intrfc->if_sklist_lock);
217 /* caller must hold intrfc->if_sklist_lock */
218 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
223 sk_for_each(s, &intrfc->if_sklist)
224 if (ipx_sk(s)->port == port)
231 /* caller must hold a reference to intrfc */
232 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
237 spin_lock_bh(&intrfc->if_sklist_lock);
238 s = __ipxitf_find_socket(intrfc, port);
241 spin_unlock_bh(&intrfc->if_sklist_lock);
246 #ifdef CONFIG_IPX_INTERN
247 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
248 unsigned char *ipx_node,
254 spin_lock_bh(&intrfc->if_sklist_lock);
256 sk_for_each(s, &intrfc->if_sklist) {
257 struct ipx_sock *ipxs = ipx_sk(s);
259 if (ipxs->port == port &&
260 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
265 spin_unlock_bh(&intrfc->if_sklist_lock);
271 static void __ipxitf_down(struct ipx_interface *intrfc)
274 struct hlist_node *t;
276 /* Delete all routes associated with this interface */
277 ipxrtr_del_routes(intrfc);
279 spin_lock_bh(&intrfc->if_sklist_lock);
281 sk_for_each_safe(s, t, &intrfc->if_sklist) {
282 struct ipx_sock *ipxs = ipx_sk(s);
285 s->sk_error_report(s);
288 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
291 INIT_HLIST_HEAD(&intrfc->if_sklist);
292 spin_unlock_bh(&intrfc->if_sklist_lock);
294 /* remove this interface from list */
295 list_del(&intrfc->node);
297 /* remove this interface from *special* networks */
298 if (intrfc == ipx_primary_net)
299 ipxitf_clear_primary_net();
300 if (intrfc == ipx_internal_net)
301 ipx_internal_net = NULL;
304 dev_put(intrfc->if_dev);
308 void ipxitf_down(struct ipx_interface *intrfc)
310 spin_lock_bh(&ipx_interfaces_lock);
311 __ipxitf_down(intrfc);
312 spin_unlock_bh(&ipx_interfaces_lock);
315 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
317 if (atomic_dec_and_test(&intrfc->refcnt))
318 __ipxitf_down(intrfc);
321 static int ipxitf_device_event(struct notifier_block *notifier,
322 unsigned long event, void *ptr)
324 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
325 struct ipx_interface *i, *tmp;
327 if (!net_eq(dev_net(dev), &init_net))
330 if (event != NETDEV_DOWN && event != NETDEV_UP)
333 spin_lock_bh(&ipx_interfaces_lock);
334 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
335 if (i->if_dev == dev) {
336 if (event == NETDEV_UP)
341 spin_unlock_bh(&ipx_interfaces_lock);
347 static __exit void ipxitf_cleanup(void)
349 struct ipx_interface *i, *tmp;
351 spin_lock_bh(&ipx_interfaces_lock);
352 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
354 spin_unlock_bh(&ipx_interfaces_lock);
357 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
359 if (sock_queue_rcv_skb(sock, skb) < 0)
364 * On input skb->sk is NULL. Nobody is charged for the memory.
367 /* caller must hold a reference to intrfc */
369 #ifdef CONFIG_IPX_INTERN
370 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
371 struct sk_buff *skb, int copy)
373 struct ipxhdr *ipx = ipx_hdr(skb);
374 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
379 spin_lock_bh(&intrfc->if_sklist_lock);
381 sk_for_each(s, &intrfc->if_sklist) {
382 struct ipx_sock *ipxs = ipx_sk(s);
384 if (ipxs->port == ipx->ipx_dest.sock &&
385 (is_broadcast || !memcmp(ipx->ipx_dest.node,
386 ipxs->node, IPX_NODE_LEN))) {
387 /* We found a socket to which to send */
388 struct sk_buff *skb1;
391 skb1 = skb_clone(skb, GFP_ATOMIC);
397 copy = 1; /* skb may only be used once */
399 ipxitf_def_skb_handler(s, skb1);
401 /* On an external interface, one socket can listen */
402 if (intrfc != ipx_internal_net)
407 /* skb was solely for us, and we did not make a copy, so free it. */
413 spin_unlock_bh(&intrfc->if_sklist_lock);
417 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
420 /* The packet's target is a NCP connection handler. We want to hand it
421 * to the correct socket directly within the kernel, so that the
422 * mars_nwe packet distribution process does not have to do it. Here we
423 * only care about NCP and BURST packets.
425 * You might call this a hack, but believe me, you do not want a
426 * complete NCP layer in the kernel, and this is VERY fast as well. */
427 struct sock *sk = NULL;
429 u8 *ncphdr = (u8 *)(ipx + 1);
431 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
432 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
433 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
434 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
437 /* Now we have to look for a special NCP connection handling
438 * socket. Only these sockets have ipx_ncp_conn != 0, set by
440 spin_lock_bh(&intrfc->if_sklist_lock);
441 sk_for_each(sk, &intrfc->if_sklist)
442 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
448 spin_unlock_bh(&intrfc->if_sklist_lock);
453 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
454 struct sk_buff *skb, int copy)
456 struct ipxhdr *ipx = ipx_hdr(skb);
457 struct sock *sock1 = NULL, *sock2 = NULL;
458 struct sk_buff *skb1 = NULL, *skb2 = NULL;
461 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
462 sock1 = ncp_connection_hack(intrfc, ipx);
464 /* No special socket found, forward the packet the normal way */
465 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
468 * We need to check if there is a primary net and if
469 * this is addressed to one of the *SPECIAL* sockets because
470 * these need to be propagated to the primary net.
471 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
475 if (ipx_primary_net && intrfc != ipx_primary_net) {
476 const int dsock = ntohs(ipx->ipx_dest.sock);
478 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
479 /* The appropriate thing to do here is to dup the
480 * packet and route to the primary net interface via
481 * ipxitf_send; however, we'll cheat and just demux it
483 sock2 = ipxitf_find_socket(ipx_primary_net,
488 * If there is nothing to do return. The kfree will cancel any charging.
491 if (!sock1 && !sock2) {
498 * This next segment of code is a little awkward, but it sets it up
499 * so that the appropriate number of copies of the SKB are made and
500 * that skb1 and skb2 point to it (them) so that it (they) can be
501 * demuxed to sock1 and/or sock2. If we are unable to make enough
502 * copies, we do as much as is possible.
506 skb1 = skb_clone(skb, GFP_ATOMIC);
514 /* Do we need 2 SKBs? */
516 skb2 = skb_clone(skb1, GFP_ATOMIC);
521 ipxitf_def_skb_handler(sock1, skb1);
527 ipxitf_def_skb_handler(sock2, skb2);
538 #endif /* CONFIG_IPX_INTERN */
540 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
543 struct sk_buff *skb2;
544 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
545 int out_offset = intrfc->if_ipx_offset;
548 /* Hopefully, most cases */
549 if (in_offset >= out_offset)
553 len = skb->len + out_offset;
554 skb2 = alloc_skb(len, GFP_ATOMIC);
556 skb_reserve(skb2, out_offset);
557 skb_reset_network_header(skb2);
558 skb_reset_transport_header(skb2);
559 skb_put(skb2, skb->len);
560 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
561 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
567 /* caller must hold a reference to intrfc and the skb has to be unshared */
568 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
570 struct ipxhdr *ipx = ipx_hdr(skb);
571 struct net_device *dev = intrfc->if_dev;
572 struct datalink_proto *dl = intrfc->if_dlink;
573 char dest_node[IPX_NODE_LEN];
574 int send_to_wire = 1;
577 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
578 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
579 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
581 /* see if we need to include the netnum in the route list */
582 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
583 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
584 sizeof(struct ipxhdr) +
585 IPX_SKB_CB(skb)->last_hop.index *
587 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
588 IPX_SKB_CB(skb)->last_hop.index = -1;
592 * We need to know how many skbuffs it will take to send out this
593 * packet to avoid unnecessary copies.
596 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
597 send_to_wire = 0; /* No non looped */
600 * See if this should be demuxed to sockets on this interface
602 * We want to ensure the original was eaten or that we only use
606 if (ipx->ipx_dest.net == intrfc->if_netnum) {
608 * To our own node, loop and free the original.
609 * The internal net will receive on all node address.
611 if (intrfc == ipx_internal_net ||
612 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
613 /* Don't charge sender */
616 /* Will charge receiver */
617 return ipxitf_demux_socket(intrfc, skb, 0);
620 /* Broadcast, loop and possibly keep to send on. */
621 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
624 ipxitf_demux_socket(intrfc, skb, send_to_wire);
631 * If the originating net is not equal to our net; this is routed
632 * We are still charging the sender. Which is right - the driver
633 * free will handle this fairly.
635 if (ipx->ipx_source.net != intrfc->if_netnum) {
637 * Unshare the buffer before modifying the count in
638 * case it's a flood or tcpdump
640 skb = skb_unshare(skb, GFP_ATOMIC);
643 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
652 /* Determine the appropriate hardware address */
653 addr_len = dev->addr_len;
654 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
655 memcpy(dest_node, dev->broadcast, addr_len);
657 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
659 /* Make any compensation for differing physical/data link size */
660 skb = ipxitf_adjust_skbuff(intrfc, skb);
664 /* set up data link and physical headers */
666 skb->protocol = htons(ETH_P_IPX);
669 dl->request(dl, skb, dest_node);
674 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
676 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
679 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
680 struct sk_buff *skb);
681 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
683 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
685 struct ipxhdr *ipx = ipx_hdr(skb);
690 /* See if we should update our network number */
691 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
692 ipxitf_discover_netnum(intrfc, skb);
694 IPX_SKB_CB(skb)->last_hop.index = -1;
695 if (ipx->ipx_type == IPX_TYPE_PPROP) {
696 rc = ipxitf_pprop(intrfc, skb);
701 /* local processing follows */
702 if (!IPX_SKB_CB(skb)->ipx_dest_net)
703 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
704 if (!IPX_SKB_CB(skb)->ipx_source_net)
705 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
707 /* it doesn't make sense to route a pprop packet, there's no meaning
708 * in the ipx_dest_net for such packets */
709 if (ipx->ipx_type != IPX_TYPE_PPROP &&
710 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
711 /* We only route point-to-point packets. */
712 if (skb->pkt_type == PACKET_HOST) {
713 skb = skb_unshare(skb, GFP_ATOMIC);
715 rc = ipxrtr_route_skb(skb);
722 /* see if we should keep it */
723 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
724 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
725 rc = ipxitf_demux_socket(intrfc, skb, 0);
729 /* we couldn't pawn it off so unload it */
737 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
740 const struct ipx_cb *cb = IPX_SKB_CB(skb);
742 /* see if this is an intra packet: source_net == dest_net */
743 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
744 struct ipx_interface *i =
745 ipxitf_find_using_net(cb->ipx_source_net);
746 /* NB: NetWare servers lie about their hop count so we
747 * dropped the test based on it. This is the best way
748 * to determine this is a 0 hop count packet. */
750 intrfc->if_netnum = cb->ipx_source_net;
751 ipxitf_add_local_route(intrfc);
753 printk(KERN_WARNING "IPX: Network number collision "
754 "%lx\n %s %s and %s %s\n",
755 (unsigned long) ntohl(cb->ipx_source_net),
757 ipx_frame_name(i->if_dlink_type),
758 ipx_device_name(intrfc),
759 ipx_frame_name(intrfc->if_dlink_type));
766 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
768 * @intrfc: IPX interface receiving this packet
769 * @skb: Received packet
771 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
772 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
773 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
774 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
775 * RIP and SAP Router Specification", Part Number 107-000029-001.
777 * If it is valid, check if we have pprop broadcasting enabled by the user,
778 * if not, just return zero for local processing.
780 * If it is enabled check the packet and don't broadcast it if we have already
783 * Broadcast: send it to the interfaces that aren't on the packet visited nets
784 * array, just after the IPX header.
786 * Returns -EINVAL for invalid packets, so that the calling function drops
787 * the packet without local processing. 0 if packet is to be locally processed.
789 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
791 struct ipxhdr *ipx = ipx_hdr(skb);
793 struct ipx_interface *ifcs;
797 /* Illegal packet - too many hops or too short */
798 /* We decide to throw it away: no broadcasting, no local processing.
799 * NetBIOS unaware implementations route them as normal packets -
800 * tctrl <= 15, any data payload... */
801 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
802 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
803 IPX_MAX_PPROP_HOPS * sizeof(u32))
805 /* are we broadcasting this damn thing? */
807 if (!sysctl_ipx_pprop_broadcasting)
809 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
810 * process it locally. All previous hops broadcasted it, and process it
812 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
815 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
818 /* Don't broadcast packet if already seen this net */
819 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
820 if (*l++ == intrfc->if_netnum)
823 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
824 * position where we will insert recvd netnum into list, later on,
826 IPX_SKB_CB(skb)->last_hop.index = i;
827 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
828 /* xmit on all other interfaces... */
829 spin_lock_bh(&ipx_interfaces_lock);
830 list_for_each_entry(ifcs, &ipx_interfaces, node) {
831 /* Except unconfigured interfaces */
832 if (!ifcs->if_netnum)
835 /* That aren't in the list */
839 /* don't consider the last entry in the packet list,
840 * it is our netnum, and it is not there yet */
841 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
842 if (ifcs->if_netnum == *l++)
844 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
845 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
848 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
853 spin_unlock_bh(&ipx_interfaces_lock);
858 static void ipxitf_insert(struct ipx_interface *intrfc)
860 spin_lock_bh(&ipx_interfaces_lock);
861 list_add_tail(&intrfc->node, &ipx_interfaces);
862 spin_unlock_bh(&ipx_interfaces_lock);
864 if (ipxcfg_auto_select_primary && !ipx_primary_net)
865 ipx_primary_net = intrfc;
868 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
870 struct datalink_proto *dlink,
871 unsigned char internal,
874 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
877 intrfc->if_dev = dev;
878 intrfc->if_netnum = netnum;
879 intrfc->if_dlink_type = dlink_type;
880 intrfc->if_dlink = dlink;
881 intrfc->if_internal = internal;
882 intrfc->if_ipx_offset = ipx_offset;
883 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
884 INIT_HLIST_HEAD(&intrfc->if_sklist);
885 atomic_set(&intrfc->refcnt, 1);
886 spin_lock_init(&intrfc->if_sklist_lock);
892 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
894 struct ipx_interface *intrfc;
897 /* Only one primary network allowed */
901 /* Must have a valid network number */
903 if (!idef->ipx_network)
905 intrfc = ipxitf_find_using_net(idef->ipx_network);
911 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
915 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
916 ipx_internal_net = ipx_primary_net = intrfc;
918 ipxitf_insert(intrfc);
920 rc = ipxitf_add_local_route(intrfc);
926 static __be16 ipx_map_frame_type(unsigned char type)
931 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
932 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
933 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
934 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
940 static int ipxitf_create(struct ipx_interface_definition *idef)
942 struct net_device *dev;
943 __be16 dlink_type = 0;
944 struct datalink_proto *datalink = NULL;
945 struct ipx_interface *intrfc;
948 if (idef->ipx_special == IPX_INTERNAL) {
949 rc = ipxitf_create_internal(idef);
954 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
957 intrfc = ipxitf_find_using_net(idef->ipx_network);
959 if (idef->ipx_network && intrfc) {
967 dev = dev_get_by_name(&init_net, idef->ipx_device);
972 switch (idef->ipx_dlink_type) {
974 dlink_type = htons(ETH_P_802_2);
975 datalink = p8022_datalink;
977 case IPX_FRAME_ETHERII:
978 if (dev->type != ARPHRD_IEEE802) {
979 dlink_type = htons(ETH_P_IPX);
980 datalink = pEII_datalink;
985 dlink_type = htons(ETH_P_SNAP);
986 datalink = pSNAP_datalink;
989 dlink_type = htons(ETH_P_802_3);
990 datalink = p8023_datalink;
994 rc = -EPROTONOSUPPORT;
999 if (!(dev->flags & IFF_UP))
1002 /* Check addresses are suitable */
1004 if (dev->addr_len > IPX_NODE_LEN)
1007 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1010 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1011 datalink, 0, dev->hard_header_len +
1012 datalink->header_length);
1016 /* Setup primary if necessary */
1017 if (idef->ipx_special == IPX_PRIMARY)
1018 ipx_primary_net = intrfc;
1019 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1021 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1022 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1023 dev->dev_addr, dev->addr_len);
1025 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1026 ipxitf_hold(intrfc);
1027 ipxitf_insert(intrfc);
1031 /* If the network number is known, add a route */
1033 if (!intrfc->if_netnum)
1036 rc = ipxitf_add_local_route(intrfc);
1046 static int ipxitf_delete(struct ipx_interface_definition *idef)
1048 struct net_device *dev = NULL;
1049 __be16 dlink_type = 0;
1050 struct ipx_interface *intrfc;
1053 spin_lock_bh(&ipx_interfaces_lock);
1054 if (idef->ipx_special == IPX_INTERNAL) {
1055 if (ipx_internal_net) {
1056 __ipxitf_put(ipx_internal_net);
1063 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1064 rc = -EPROTONOSUPPORT;
1068 dev = __dev_get_by_name(&init_net, idef->ipx_device);
1073 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1077 __ipxitf_put(intrfc);
1081 spin_unlock_bh(&ipx_interfaces_lock);
1085 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1088 struct ipx_interface *intrfc = NULL;
1089 struct datalink_proto *datalink;
1094 /* Check addresses are suitable */
1095 if (dev->addr_len > IPX_NODE_LEN)
1098 switch (ntohs(dlink_type)) {
1099 case ETH_P_IPX: datalink = pEII_datalink; break;
1100 case ETH_P_802_2: datalink = p8022_datalink; break;
1101 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1102 case ETH_P_802_3: datalink = p8023_datalink; break;
1106 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1107 dev->hard_header_len + datalink->header_length);
1110 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1111 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1112 dev->dev_addr, dev->addr_len);
1113 spin_lock_init(&intrfc->if_sklist_lock);
1114 atomic_set(&intrfc->refcnt, 1);
1115 ipxitf_insert(intrfc);
1123 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1131 struct sockaddr_ipx *sipx;
1132 struct ipx_interface_definition f;
1135 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1137 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1139 if (sipx->sipx_family != AF_IPX)
1141 f.ipx_network = sipx->sipx_network;
1142 memcpy(f.ipx_device, ifr.ifr_name,
1143 sizeof(f.ipx_device));
1144 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1145 f.ipx_dlink_type = sipx->sipx_type;
1146 f.ipx_special = sipx->sipx_special;
1148 if (sipx->sipx_action == IPX_DLTITF)
1149 rc = ipxitf_delete(&f);
1151 rc = ipxitf_create(&f);
1155 struct sockaddr_ipx *sipx;
1156 struct ipx_interface *ipxif;
1157 struct net_device *dev;
1160 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1162 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1163 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
1167 ipxif = ipxitf_find_using_phys(dev,
1168 ipx_map_frame_type(sipx->sipx_type));
1169 rc = -EADDRNOTAVAIL;
1173 sipx->sipx_family = AF_IPX;
1174 sipx->sipx_network = ipxif->if_netnum;
1175 memcpy(sipx->sipx_node, ipxif->if_node,
1176 sizeof(sipx->sipx_node));
1178 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1184 case SIOCAIPXITFCRT:
1186 if (get_user(val, (unsigned char __user *) arg))
1189 ipxcfg_auto_create_interfaces = val;
1191 case SIOCAIPXPRISLT:
1193 if (get_user(val, (unsigned char __user *) arg))
1196 ipxcfg_set_auto_select(val);
1204 * Checksum routine for IPX
1207 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1208 /* This functions should *not* mess with packet contents */
1210 __be16 ipx_cksum(struct ipxhdr *packet, int length)
1213 * NOTE: sum is a net byte order quantity, which optimizes the
1214 * loop. This only works on big and little endian machines. (I
1215 * don't know of a machine that isn't.)
1217 /* handle the first 3 words separately; checksum should be skipped
1218 * and ipx_tctrl masked out */
1219 __u16 *p = (__u16 *)packet;
1220 __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
1221 __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
1223 /* Loop through them */
1228 /* Add on the last part word if it exists */
1229 if (packet->ipx_pktsize & htons(1))
1230 sum += (__force u16)htons(0xff00) & *p;
1232 /* Do final fixup */
1233 sum = (sum & 0xffff) + (sum >> 16);
1235 /* It's a pity there's no concept of carry in C */
1240 * Leave 0 alone; we don't want 0xffff here. Note that we can't get
1241 * here with 0x10000, so this check is the same as ((__u16)sum)
1246 return (__force __be16)sum;
1249 const char *ipx_frame_name(__be16 frame)
1253 switch (ntohs(frame)) {
1254 case ETH_P_IPX: rc = "EtherII"; break;
1255 case ETH_P_802_2: rc = "802.2"; break;
1256 case ETH_P_SNAP: rc = "SNAP"; break;
1257 case ETH_P_802_3: rc = "802.3"; break;
1263 const char *ipx_device_name(struct ipx_interface *intrfc)
1265 return intrfc->if_internal ? "Internal" :
1266 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1269 /* Handling for system calls applied via the various interfaces to an IPX
1272 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1273 char __user *optval, unsigned int optlen)
1275 struct sock *sk = sock->sk;
1280 if (optlen != sizeof(int))
1284 if (get_user(opt, (unsigned int __user *)optval))
1288 if (!(level == SOL_IPX && optname == IPX_TYPE))
1291 ipx_sk(sk)->type = opt;
1298 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1299 char __user *optval, int __user *optlen)
1301 struct sock *sk = sock->sk;
1304 int rc = -ENOPROTOOPT;
1307 if (!(level == SOL_IPX && optname == IPX_TYPE))
1310 val = ipx_sk(sk)->type;
1313 if (get_user(len, optlen))
1316 len = min_t(unsigned int, len, sizeof(int));
1322 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1331 static struct proto ipx_proto = {
1333 .owner = THIS_MODULE,
1334 .obj_size = sizeof(struct ipx_sock),
1337 static int ipx_create(struct net *net, struct socket *sock, int protocol,
1340 int rc = -ESOCKTNOSUPPORT;
1343 if (!net_eq(net, &init_net))
1344 return -EAFNOSUPPORT;
1347 * SPX support is not anymore in the kernel sources. If you want to
1348 * ressurrect it, completing it and making it understand shared skbs,
1349 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1352 if (sock->type != SOCK_DGRAM)
1356 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto);
1360 sk_refcnt_debug_inc(sk);
1361 sock_init_data(sock, sk);
1362 sk->sk_no_check = 1; /* Checksum off by default */
1363 sock->ops = &ipx_dgram_ops;
1369 static int ipx_release(struct socket *sock)
1371 struct sock *sk = sock->sk;
1377 if (!sock_flag(sk, SOCK_DEAD))
1378 sk->sk_state_change(sk);
1380 sock_set_flag(sk, SOCK_DEAD);
1382 sk_refcnt_debug_release(sk);
1383 ipx_destroy_socket(sk);
1390 /* caller must hold a reference to intrfc */
1392 static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
1394 unsigned short socketNum = intrfc->if_sknum;
1396 spin_lock_bh(&intrfc->if_sklist_lock);
1398 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1399 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1401 while (__ipxitf_find_socket(intrfc, htons(socketNum)))
1402 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1403 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1407 spin_unlock_bh(&intrfc->if_sklist_lock);
1408 intrfc->if_sknum = socketNum;
1410 return htons(socketNum);
1413 static int __ipx_bind(struct socket *sock,
1414 struct sockaddr *uaddr, int addr_len)
1416 struct sock *sk = sock->sk;
1417 struct ipx_sock *ipxs = ipx_sk(sk);
1418 struct ipx_interface *intrfc;
1419 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1422 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1425 intrfc = ipxitf_find_using_net(addr->sipx_network);
1426 rc = -EADDRNOTAVAIL;
1430 if (!addr->sipx_port) {
1431 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1433 if (!addr->sipx_port)
1437 /* protect IPX system stuff like routing/sap */
1439 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1440 !capable(CAP_NET_ADMIN))
1443 ipxs->port = addr->sipx_port;
1445 #ifdef CONFIG_IPX_INTERN
1446 if (intrfc == ipx_internal_net) {
1447 /* The source address is to be set explicitly if the
1448 * socket is to be bound on the internal network. If a
1449 * node number 0 was specified, the default is used.
1453 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1455 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1456 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1458 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1461 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1464 "IPX: bind failed because port %X in use.\n",
1465 ntohs(addr->sipx_port));
1469 /* Source addresses are easy. It must be our
1470 * network:node pair for an interface routed to IPX
1471 * with the ipx routing ioctl()
1474 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1477 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1479 "IPX: bind failed because port %X in use.\n",
1480 ntohs(addr->sipx_port));
1485 #else /* !def CONFIG_IPX_INTERN */
1487 /* Source addresses are easy. It must be our network:node pair for
1488 an interface routed to IPX with the ipx routing ioctl() */
1491 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1492 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1493 ntohs((int)addr->sipx_port));
1497 #endif /* CONFIG_IPX_INTERN */
1499 ipxitf_insert_socket(intrfc, sk);
1500 sock_reset_flag(sk, SOCK_ZAPPED);
1509 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1511 struct sock *sk = sock->sk;
1515 rc = __ipx_bind(sock, uaddr, addr_len);
1521 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1522 int addr_len, int flags)
1524 struct sock *sk = sock->sk;
1525 struct ipx_sock *ipxs = ipx_sk(sk);
1526 struct sockaddr_ipx *addr;
1528 struct ipx_route *rt;
1530 sk->sk_state = TCP_CLOSE;
1531 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;
1585 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1586 int *uaddr_len, int peer)
1588 struct ipx_address *addr;
1589 struct sockaddr_ipx sipx;
1590 struct sock *sk = sock->sk;
1591 struct ipx_sock *ipxs = ipx_sk(sk);
1594 *uaddr_len = sizeof(struct sockaddr_ipx);
1599 if (sk->sk_state != TCP_ESTABLISHED)
1602 addr = &ipxs->dest_addr;
1603 sipx.sipx_network = addr->net;
1604 sipx.sipx_port = addr->sock;
1605 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1608 sipx.sipx_network = ipxs->intrfc->if_netnum;
1609 #ifdef CONFIG_IPX_INTERN
1610 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1612 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1614 #endif /* CONFIG_IPX_INTERN */
1617 sipx.sipx_network = 0;
1618 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1621 sipx.sipx_port = ipxs->port;
1624 sipx.sipx_family = AF_IPX;
1625 sipx.sipx_type = ipxs->type;
1627 memcpy(uaddr, &sipx, sizeof(sipx));
1635 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1637 /* NULL here for pt means the packet was looped back */
1638 struct ipx_interface *intrfc;
1643 if (!net_eq(dev_net(dev), &init_net))
1647 if (skb->pkt_type == PACKET_OTHERHOST)
1650 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1653 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1656 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1658 /* Too small or invalid header? */
1659 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1660 !pskb_may_pull(skb, ipx_pktsize))
1664 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1665 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1668 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1669 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1670 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1672 /* Determine what local ipx endpoint this is */
1673 intrfc = ipxitf_find_using_phys(dev, pt->type);
1675 if (ipxcfg_auto_create_interfaces &&
1676 IPX_SKB_CB(skb)->ipx_dest_net) {
1677 intrfc = ipxitf_auto_create(dev, pt->type);
1679 ipxitf_hold(intrfc);
1682 if (!intrfc) /* Not one of ours */
1683 /* or invalid packet for auto creation */
1687 rc = ipxitf_rcv(intrfc, skb);
1696 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1697 struct msghdr *msg, size_t len)
1699 struct sock *sk = sock->sk;
1700 struct ipx_sock *ipxs = ipx_sk(sk);
1701 DECLARE_SOCKADDR(struct sockaddr_ipx *, usipx, msg->msg_name);
1702 struct sockaddr_ipx local_sipx;
1704 int flags = msg->msg_flags;
1707 /* Socket gets bound below anyway */
1708 /* if (sk->sk_zapped)
1709 return -EIO; */ /* Socket not bound */
1710 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1713 /* Max possible packet size limited by 16 bit pktsize in header */
1714 if (len >= 65535 - sizeof(struct ipxhdr))
1719 struct sockaddr_ipx uaddr;
1721 uaddr.sipx_port = 0;
1722 uaddr.sipx_network = 0;
1723 #ifdef CONFIG_IPX_INTERN
1726 goto out; /* Someone zonked the iface */
1727 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1730 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1731 sizeof(struct sockaddr_ipx));
1737 if (msg->msg_namelen < sizeof(*usipx) ||
1738 usipx->sipx_family != AF_IPX)
1742 if (sk->sk_state != TCP_ESTABLISHED)
1745 usipx = &local_sipx;
1746 usipx->sipx_family = AF_IPX;
1747 usipx->sipx_type = ipxs->type;
1748 usipx->sipx_port = ipxs->dest_addr.sock;
1749 usipx->sipx_network = ipxs->dest_addr.net;
1750 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1753 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1754 flags & MSG_DONTWAIT);
1763 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1764 struct msghdr *msg, size_t size, int flags)
1766 struct sock *sk = sock->sk;
1767 struct ipx_sock *ipxs = ipx_sk(sk);
1768 DECLARE_SOCKADDR(struct sockaddr_ipx *, sipx, msg->msg_name);
1769 struct ipxhdr *ipx = NULL;
1770 struct sk_buff *skb;
1774 /* put the autobinding in */
1776 struct sockaddr_ipx uaddr;
1778 uaddr.sipx_port = 0;
1779 uaddr.sipx_network = 0;
1781 #ifdef CONFIG_IPX_INTERN
1784 goto out; /* Someone zonked the iface */
1785 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1786 #endif /* CONFIG_IPX_INTERN */
1788 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1789 sizeof(struct sockaddr_ipx));
1795 if (sock_flag(sk, SOCK_ZAPPED))
1798 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1799 flags & MSG_DONTWAIT, &rc);
1804 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1805 if (copied > size) {
1807 msg->msg_flags |= MSG_TRUNC;
1810 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1814 if (skb->tstamp.tv64)
1815 sk->sk_stamp = skb->tstamp;
1818 sipx->sipx_family = AF_IPX;
1819 sipx->sipx_port = ipx->ipx_source.sock;
1820 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1821 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1822 sipx->sipx_type = ipx->ipx_type;
1823 sipx->sipx_zero = 0;
1824 msg->msg_namelen = sizeof(*sipx);
1829 skb_free_datagram(sk, skb);
1836 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1840 struct sock *sk = sock->sk;
1841 void __user *argp = (void __user *)arg;
1846 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1849 rc = put_user(amount, (int __user *)argp);
1852 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1853 /* These two are safe on a single CPU system as only
1854 * user tasks fiddle here */
1856 amount = skb->len - sizeof(struct ipxhdr);
1857 rc = put_user(amount, (int __user *)argp);
1863 if (capable(CAP_NET_ADMIN))
1864 rc = ipxrtr_ioctl(cmd, argp);
1867 case SIOCAIPXITFCRT:
1868 case SIOCAIPXPRISLT:
1870 if (!capable(CAP_NET_ADMIN))
1873 rc = ipxitf_ioctl(cmd, argp);
1875 case SIOCIPXCFGDATA:
1876 rc = ipxcfg_get_config_data(argp);
1878 case SIOCIPXNCPCONN:
1880 * This socket wants to take care of the NCP connection
1881 * handed to us in arg.
1884 if (!capable(CAP_NET_ADMIN))
1886 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1887 (const unsigned short __user *)argp);
1890 rc = sock_get_timestamp(sk, argp);
1892 case SIOCGIFDSTADDR:
1893 case SIOCSIFDSTADDR:
1894 case SIOCGIFBRDADDR:
1895 case SIOCSIFBRDADDR:
1896 case SIOCGIFNETMASK:
1897 case SIOCSIFNETMASK:
1910 #ifdef CONFIG_COMPAT
1911 static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1914 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1915 * commands is handled by generic ioctl code. As these commands are
1916 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1920 case SIOCAIPXITFCRT:
1921 case SIOCAIPXPRISLT:
1922 case SIOCIPXCFGDATA:
1923 case SIOCIPXNCPCONN:
1924 return ipx_ioctl(sock, cmd, arg);
1926 return -ENOIOCTLCMD;
1933 * Socket family declarations
1936 static const struct net_proto_family ipx_family_ops = {
1938 .create = ipx_create,
1939 .owner = THIS_MODULE,
1942 static const struct proto_ops ipx_dgram_ops = {
1944 .owner = THIS_MODULE,
1945 .release = ipx_release,
1947 .connect = ipx_connect,
1948 .socketpair = sock_no_socketpair,
1949 .accept = sock_no_accept,
1950 .getname = ipx_getname,
1951 .poll = datagram_poll,
1953 #ifdef CONFIG_COMPAT
1954 .compat_ioctl = ipx_compat_ioctl,
1956 .listen = sock_no_listen,
1957 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1958 .setsockopt = ipx_setsockopt,
1959 .getsockopt = ipx_getsockopt,
1960 .sendmsg = ipx_sendmsg,
1961 .recvmsg = ipx_recvmsg,
1962 .mmap = sock_no_mmap,
1963 .sendpage = sock_no_sendpage,
1966 static struct packet_type ipx_8023_packet_type __read_mostly = {
1967 .type = cpu_to_be16(ETH_P_802_3),
1971 static struct packet_type ipx_dix_packet_type __read_mostly = {
1972 .type = cpu_to_be16(ETH_P_IPX),
1976 static struct notifier_block ipx_dev_notifier = {
1977 .notifier_call = ipxitf_device_event,
1980 extern struct datalink_proto *make_EII_client(void);
1981 extern void destroy_EII_client(struct datalink_proto *);
1983 static const unsigned char ipx_8022_type = 0xE0;
1984 static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1985 static const char ipx_EII_err_msg[] __initconst =
1986 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1987 static const char ipx_8023_err_msg[] __initconst =
1988 KERN_CRIT "IPX: Unable to register with 802.3\n";
1989 static const char ipx_llc_err_msg[] __initconst =
1990 KERN_CRIT "IPX: Unable to register with 802.2\n";
1991 static const char ipx_snap_err_msg[] __initconst =
1992 KERN_CRIT "IPX: Unable to register with SNAP\n";
1994 static int __init ipx_init(void)
1996 int rc = proto_register(&ipx_proto, 1);
2001 sock_register(&ipx_family_ops);
2003 pEII_datalink = make_EII_client();
2005 dev_add_pack(&ipx_dix_packet_type);
2007 printk(ipx_EII_err_msg);
2009 p8023_datalink = make_8023_client();
2011 dev_add_pack(&ipx_8023_packet_type);
2013 printk(ipx_8023_err_msg);
2015 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2016 if (!p8022_datalink)
2017 printk(ipx_llc_err_msg);
2019 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2020 if (!pSNAP_datalink)
2021 printk(ipx_snap_err_msg);
2023 register_netdevice_notifier(&ipx_dev_notifier);
2024 ipx_register_sysctl();
2030 static void __exit ipx_proto_finito(void)
2033 ipx_unregister_sysctl();
2035 unregister_netdevice_notifier(&ipx_dev_notifier);
2039 if (pSNAP_datalink) {
2040 unregister_snap_client(pSNAP_datalink);
2041 pSNAP_datalink = NULL;
2044 if (p8022_datalink) {
2045 unregister_8022_client(p8022_datalink);
2046 p8022_datalink = NULL;
2049 dev_remove_pack(&ipx_8023_packet_type);
2050 if (p8023_datalink) {
2051 destroy_8023_client(p8023_datalink);
2052 p8023_datalink = NULL;
2055 dev_remove_pack(&ipx_dix_packet_type);
2056 if (pEII_datalink) {
2057 destroy_EII_client(pEII_datalink);
2058 pEII_datalink = NULL;
2061 proto_unregister(&ipx_proto);
2062 sock_unregister(ipx_family_ops.family);
2065 module_init(ipx_init);
2066 module_exit(ipx_proto_finito);
2067 MODULE_LICENSE("GPL");
2068 MODULE_ALIAS_NETPROTO(PF_IPX);