+++ /dev/null
-/*
- * Implements an IPX socket layer.
- *
- * This code is derived from work by
- * Ross Biro : Writing the original IP stack
- * Fred Van Kempen : Tidying up the TCP/IP
- *
- * Many thanks go to Keith Baker, Institute For Industrial Information
- * Technology Ltd, Swansea University for allowing me to work on this
- * in my own time even though it was in some ways related to commercial
- * work I am currently employed to do there.
- *
- * All the material in this file is subject to the Gnu license version 2.
- * Neither Alan Cox nor the Swansea University Computer Society admit
- * liability nor provide warranty for any of this software. This material
- * is provided as is and at no charge.
- *
- * Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br>
- * Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor
- * provide warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
- * Neither Greg Page nor Caldera, Inc. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * See net/ipx/ChangeLog.
- */
-
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/init.h>
-#include <linux/ipx.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/uio.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/termios.h>
-
-#include <net/ipx.h>
-#include <net/p8022.h>
-#include <net/psnap.h>
-#include <net/sock.h>
-#include <net/datalink.h>
-#include <net/tcp_states.h>
-#include <net/net_namespace.h>
-
-#include <linux/uaccess.h>
-
-/* Configuration Variables */
-static unsigned char ipxcfg_max_hops = 16;
-static char ipxcfg_auto_select_primary;
-static char ipxcfg_auto_create_interfaces;
-int sysctl_ipx_pprop_broadcasting = 1;
-
-/* Global Variables */
-static struct datalink_proto *p8022_datalink;
-static struct datalink_proto *pEII_datalink;
-static struct datalink_proto *p8023_datalink;
-static struct datalink_proto *pSNAP_datalink;
-
-static const struct proto_ops ipx_dgram_ops;
-
-LIST_HEAD(ipx_interfaces);
-DEFINE_SPINLOCK(ipx_interfaces_lock);
-
-struct ipx_interface *ipx_primary_net;
-struct ipx_interface *ipx_internal_net;
-
-struct ipx_interface *ipx_interfaces_head(void)
-{
- struct ipx_interface *rc = NULL;
-
- if (!list_empty(&ipx_interfaces))
- rc = list_entry(ipx_interfaces.next,
- struct ipx_interface, node);
- return rc;
-}
-
-static void ipxcfg_set_auto_select(char val)
-{
- ipxcfg_auto_select_primary = val;
- if (val && !ipx_primary_net)
- ipx_primary_net = ipx_interfaces_head();
-}
-
-static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
-{
- struct ipx_config_data vals;
-
- vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
- vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
-
- return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
-}
-
-/*
- * Note: Sockets may not be removed _during_ an interrupt or inet_bh
- * handler using this technique. They can be added although we do not
- * use this facility.
- */
-
-static void ipx_remove_socket(struct sock *sk)
-{
- /* Determine interface with which socket is associated */
- struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
-
- if (!intrfc)
- goto out;
-
- ipxitf_hold(intrfc);
- spin_lock_bh(&intrfc->if_sklist_lock);
- sk_del_node_init(sk);
- spin_unlock_bh(&intrfc->if_sklist_lock);
- ipxitf_put(intrfc);
-out:
- return;
-}
-
-static void ipx_destroy_socket(struct sock *sk)
-{
- ipx_remove_socket(sk);
- skb_queue_purge(&sk->sk_receive_queue);
- sk_refcnt_debug_dec(sk);
-}
-
-/*
- * The following code is used to support IPX Interfaces (IPXITF). An
- * IPX interface is defined by a physical device and a frame type.
- */
-
-/* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
-
-static void ipxitf_clear_primary_net(void)
-{
- ipx_primary_net = NULL;
- if (ipxcfg_auto_select_primary)
- ipx_primary_net = ipx_interfaces_head();
-}
-
-static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
- __be16 datalink)
-{
- struct ipx_interface *i;
-
- list_for_each_entry(i, &ipx_interfaces, node)
- if (i->if_dev == dev && i->if_dlink_type == datalink)
- goto out;
- i = NULL;
-out:
- return i;
-}
-
-static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
- __be16 datalink)
-{
- struct ipx_interface *i;
-
- spin_lock_bh(&ipx_interfaces_lock);
- i = __ipxitf_find_using_phys(dev, datalink);
- if (i)
- ipxitf_hold(i);
- spin_unlock_bh(&ipx_interfaces_lock);
- return i;
-}
-
-struct ipx_interface *ipxitf_find_using_net(__be32 net)
-{
- struct ipx_interface *i;
-
- spin_lock_bh(&ipx_interfaces_lock);
- if (net) {
- list_for_each_entry(i, &ipx_interfaces, node)
- if (i->if_netnum == net)
- goto hold;
- i = NULL;
- goto unlock;
- }
-
- i = ipx_primary_net;
- if (i)
-hold:
- ipxitf_hold(i);
-unlock:
- spin_unlock_bh(&ipx_interfaces_lock);
- return i;
-}
-
-/* Sockets are bound to a particular IPX interface. */
-static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
-{
- ipxitf_hold(intrfc);
- spin_lock_bh(&intrfc->if_sklist_lock);
- ipx_sk(sk)->intrfc = intrfc;
- sk_add_node(sk, &intrfc->if_sklist);
- spin_unlock_bh(&intrfc->if_sklist_lock);
- ipxitf_put(intrfc);
-}
-
-/* caller must hold intrfc->if_sklist_lock */
-static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
- __be16 port)
-{
- struct sock *s;
-
- sk_for_each(s, &intrfc->if_sklist)
- if (ipx_sk(s)->port == port)
- goto found;
- s = NULL;
-found:
- return s;
-}
-
-/* caller must hold a reference to intrfc */
-static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
- __be16 port)
-{
- struct sock *s;
-
- spin_lock_bh(&intrfc->if_sklist_lock);
- s = __ipxitf_find_socket(intrfc, port);
- if (s)
- sock_hold(s);
- spin_unlock_bh(&intrfc->if_sklist_lock);
-
- return s;
-}
-
-#ifdef CONFIG_IPX_INTERN
-static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
- unsigned char *ipx_node,
- __be16 port)
-{
- struct sock *s;
-
- ipxitf_hold(intrfc);
- spin_lock_bh(&intrfc->if_sklist_lock);
-
- sk_for_each(s, &intrfc->if_sklist) {
- struct ipx_sock *ipxs = ipx_sk(s);
-
- if (ipxs->port == port &&
- !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
- goto found;
- }
- s = NULL;
-found:
- spin_unlock_bh(&intrfc->if_sklist_lock);
- ipxitf_put(intrfc);
- return s;
-}
-#endif
-
-static void __ipxitf_down(struct ipx_interface *intrfc)
-{
- struct sock *s;
- struct hlist_node *t;
-
- /* Delete all routes associated with this interface */
- ipxrtr_del_routes(intrfc);
-
- spin_lock_bh(&intrfc->if_sklist_lock);
- /* error sockets */
- sk_for_each_safe(s, t, &intrfc->if_sklist) {
- struct ipx_sock *ipxs = ipx_sk(s);
-
- s->sk_err = ENOLINK;
- s->sk_error_report(s);
- ipxs->intrfc = NULL;
- ipxs->port = 0;
- sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
- sk_del_node_init(s);
- }
- INIT_HLIST_HEAD(&intrfc->if_sklist);
- spin_unlock_bh(&intrfc->if_sklist_lock);
-
- /* remove this interface from list */
- list_del(&intrfc->node);
-
- /* remove this interface from *special* networks */
- if (intrfc == ipx_primary_net)
- ipxitf_clear_primary_net();
- if (intrfc == ipx_internal_net)
- ipx_internal_net = NULL;
-
- if (intrfc->if_dev)
- dev_put(intrfc->if_dev);
- kfree(intrfc);
-}
-
-void ipxitf_down(struct ipx_interface *intrfc)
-{
- spin_lock_bh(&ipx_interfaces_lock);
- __ipxitf_down(intrfc);
- spin_unlock_bh(&ipx_interfaces_lock);
-}
-
-static void __ipxitf_put(struct ipx_interface *intrfc)
-{
- if (refcount_dec_and_test(&intrfc->refcnt))
- __ipxitf_down(intrfc);
-}
-
-static int ipxitf_device_event(struct notifier_block *notifier,
- unsigned long event, void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
- struct ipx_interface *i, *tmp;
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- if (event != NETDEV_DOWN && event != NETDEV_UP)
- goto out;
-
- spin_lock_bh(&ipx_interfaces_lock);
- list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
- if (i->if_dev == dev) {
- if (event == NETDEV_UP)
- ipxitf_hold(i);
- else
- __ipxitf_put(i);
- }
- spin_unlock_bh(&ipx_interfaces_lock);
-out:
- return NOTIFY_DONE;
-}
-
-
-static __exit void ipxitf_cleanup(void)
-{
- struct ipx_interface *i, *tmp;
-
- spin_lock_bh(&ipx_interfaces_lock);
- list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
- __ipxitf_put(i);
- spin_unlock_bh(&ipx_interfaces_lock);
-}
-
-static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
-{
- if (sock_queue_rcv_skb(sock, skb) < 0)
- kfree_skb(skb);
-}
-
-/*
- * On input skb->sk is NULL. Nobody is charged for the memory.
- */
-
-/* caller must hold a reference to intrfc */
-
-#ifdef CONFIG_IPX_INTERN
-static int ipxitf_demux_socket(struct ipx_interface *intrfc,
- struct sk_buff *skb, int copy)
-{
- struct ipxhdr *ipx = ipx_hdr(skb);
- int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
- IPX_NODE_LEN);
- struct sock *s;
- int rc;
-
- spin_lock_bh(&intrfc->if_sklist_lock);
-
- sk_for_each(s, &intrfc->if_sklist) {
- struct ipx_sock *ipxs = ipx_sk(s);
-
- if (ipxs->port == ipx->ipx_dest.sock &&
- (is_broadcast || !memcmp(ipx->ipx_dest.node,
- ipxs->node, IPX_NODE_LEN))) {
- /* We found a socket to which to send */
- struct sk_buff *skb1;
-
- if (copy) {
- skb1 = skb_clone(skb, GFP_ATOMIC);
- rc = -ENOMEM;
- if (!skb1)
- goto out;
- } else {
- skb1 = skb;
- copy = 1; /* skb may only be used once */
- }
- ipxitf_def_skb_handler(s, skb1);
-
- /* On an external interface, one socket can listen */
- if (intrfc != ipx_internal_net)
- break;
- }
- }
-
- /* skb was solely for us, and we did not make a copy, so free it. */
- if (!copy)
- kfree_skb(skb);
-
- rc = 0;
-out:
- spin_unlock_bh(&intrfc->if_sklist_lock);
- return rc;
-}
-#else
-static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
- struct ipxhdr *ipx)
-{
- /* The packet's target is a NCP connection handler. We want to hand it
- * to the correct socket directly within the kernel, so that the
- * mars_nwe packet distribution process does not have to do it. Here we
- * only care about NCP and BURST packets.
- *
- * You might call this a hack, but believe me, you do not want a
- * complete NCP layer in the kernel, and this is VERY fast as well. */
- struct sock *sk = NULL;
- int connection = 0;
- u8 *ncphdr = (u8 *)(ipx + 1);
-
- if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
- connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
- else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
- connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
-
- if (connection) {
- /* Now we have to look for a special NCP connection handling
- * socket. Only these sockets have ipx_ncp_conn != 0, set by
- * SIOCIPXNCPCONN. */
- spin_lock_bh(&intrfc->if_sklist_lock);
- sk_for_each(sk, &intrfc->if_sklist)
- if (ipx_sk(sk)->ipx_ncp_conn == connection) {
- sock_hold(sk);
- goto found;
- }
- sk = NULL;
- found:
- spin_unlock_bh(&intrfc->if_sklist_lock);
- }
- return sk;
-}
-
-static int ipxitf_demux_socket(struct ipx_interface *intrfc,
- struct sk_buff *skb, int copy)
-{
- struct ipxhdr *ipx = ipx_hdr(skb);
- struct sock *sock1 = NULL, *sock2 = NULL;
- struct sk_buff *skb1 = NULL, *skb2 = NULL;
- int rc;
-
- if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
- sock1 = ncp_connection_hack(intrfc, ipx);
- if (!sock1)
- /* No special socket found, forward the packet the normal way */
- sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
-
- /*
- * We need to check if there is a primary net and if
- * this is addressed to one of the *SPECIAL* sockets because
- * these need to be propagated to the primary net.
- * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
- * 0x456(Diagnostic).
- */
-
- if (ipx_primary_net && intrfc != ipx_primary_net) {
- const int dsock = ntohs(ipx->ipx_dest.sock);
-
- if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
- /* The appropriate thing to do here is to dup the
- * packet and route to the primary net interface via
- * ipxitf_send; however, we'll cheat and just demux it
- * here. */
- sock2 = ipxitf_find_socket(ipx_primary_net,
- ipx->ipx_dest.sock);
- }
-
- /*
- * If there is nothing to do return. The kfree will cancel any charging.
- */
- rc = 0;
- if (!sock1 && !sock2) {
- if (!copy)
- kfree_skb(skb);
- goto out;
- }
-
- /*
- * This next segment of code is a little awkward, but it sets it up
- * so that the appropriate number of copies of the SKB are made and
- * that skb1 and skb2 point to it (them) so that it (they) can be
- * demuxed to sock1 and/or sock2. If we are unable to make enough
- * copies, we do as much as is possible.
- */
-
- if (copy)
- skb1 = skb_clone(skb, GFP_ATOMIC);
- else
- skb1 = skb;
-
- rc = -ENOMEM;
- if (!skb1)
- goto out_put;
-
- /* Do we need 2 SKBs? */
- if (sock1 && sock2)
- skb2 = skb_clone(skb1, GFP_ATOMIC);
- else
- skb2 = skb1;
-
- if (sock1)
- ipxitf_def_skb_handler(sock1, skb1);
-
- if (!skb2)
- goto out_put;
-
- if (sock2)
- ipxitf_def_skb_handler(sock2, skb2);
-
- rc = 0;
-out_put:
- if (sock1)
- sock_put(sock1);
- if (sock2)
- sock_put(sock2);
-out:
- return rc;
-}
-#endif /* CONFIG_IPX_INTERN */
-
-static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
- struct sk_buff *skb)
-{
- struct sk_buff *skb2;
- int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
- int out_offset = intrfc->if_ipx_offset;
- int len;
-
- /* Hopefully, most cases */
- if (in_offset >= out_offset)
- return skb;
-
- /* Need new SKB */
- len = skb->len + out_offset;
- skb2 = alloc_skb(len, GFP_ATOMIC);
- if (skb2) {
- skb_reserve(skb2, out_offset);
- skb_reset_network_header(skb2);
- skb_reset_transport_header(skb2);
- skb_put(skb2, skb->len);
- memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
- memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
- }
- kfree_skb(skb);
- return skb2;
-}
-
-/* caller must hold a reference to intrfc and the skb has to be unshared */
-int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
-{
- struct ipxhdr *ipx = ipx_hdr(skb);
- struct net_device *dev = intrfc->if_dev;
- struct datalink_proto *dl = intrfc->if_dlink;
- char dest_node[IPX_NODE_LEN];
- int send_to_wire = 1;
- int addr_len;
-
- ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
- ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
- ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
-
- /* see if we need to include the netnum in the route list */
- if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
- __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
- sizeof(struct ipxhdr) +
- IPX_SKB_CB(skb)->last_hop.index *
- sizeof(__be32));
- *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
- IPX_SKB_CB(skb)->last_hop.index = -1;
- }
-
- /*
- * We need to know how many skbuffs it will take to send out this
- * packet to avoid unnecessary copies.
- */
-
- if (!dl || !dev || dev->flags & IFF_LOOPBACK)
- send_to_wire = 0; /* No non looped */
-
- /*
- * See if this should be demuxed to sockets on this interface
- *
- * We want to ensure the original was eaten or that we only use
- * up clones.
- */
-
- if (ipx->ipx_dest.net == intrfc->if_netnum) {
- /*
- * To our own node, loop and free the original.
- * The internal net will receive on all node address.
- */
- if (intrfc == ipx_internal_net ||
- !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
- /* Don't charge sender */
- skb_orphan(skb);
-
- /* Will charge receiver */
- return ipxitf_demux_socket(intrfc, skb, 0);
- }
-
- /* Broadcast, loop and possibly keep to send on. */
- if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
- if (!send_to_wire)
- skb_orphan(skb);
- ipxitf_demux_socket(intrfc, skb, send_to_wire);
- if (!send_to_wire)
- goto out;
- }
- }
-
- /*
- * If the originating net is not equal to our net; this is routed
- * We are still charging the sender. Which is right - the driver
- * free will handle this fairly.
- */
- if (ipx->ipx_source.net != intrfc->if_netnum) {
- /*
- * Unshare the buffer before modifying the count in
- * case it's a flood or tcpdump
- */
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (!skb)
- goto out;
- if (++ipx->ipx_tctrl > ipxcfg_max_hops)
- send_to_wire = 0;
- }
-
- if (!send_to_wire) {
- kfree_skb(skb);
- goto out;
- }
-
- /* Determine the appropriate hardware address */
- addr_len = dev->addr_len;
- if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
- memcpy(dest_node, dev->broadcast, addr_len);
- else
- memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
-
- /* Make any compensation for differing physical/data link size */
- skb = ipxitf_adjust_skbuff(intrfc, skb);
- if (!skb)
- goto out;
-
- /* set up data link and physical headers */
- skb->dev = dev;
- skb->protocol = htons(ETH_P_IPX);
-
- /* Send it out */
- dl->request(dl, skb, dest_node);
-out:
- return 0;
-}
-
-static int ipxitf_add_local_route(struct ipx_interface *intrfc)
-{
- return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
-}
-
-static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
- struct sk_buff *skb);
-static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
-
-static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
-{
- struct ipxhdr *ipx = ipx_hdr(skb);
- int rc = 0;
-
- ipxitf_hold(intrfc);
-
- /* See if we should update our network number */
- if (!intrfc->if_netnum) /* net number of intrfc not known yet */
- ipxitf_discover_netnum(intrfc, skb);
-
- IPX_SKB_CB(skb)->last_hop.index = -1;
- if (ipx->ipx_type == IPX_TYPE_PPROP) {
- rc = ipxitf_pprop(intrfc, skb);
- if (rc)
- goto out_free_skb;
- }
-
- /* local processing follows */
- if (!IPX_SKB_CB(skb)->ipx_dest_net)
- IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
- if (!IPX_SKB_CB(skb)->ipx_source_net)
- IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
-
- /* it doesn't make sense to route a pprop packet, there's no meaning
- * in the ipx_dest_net for such packets */
- if (ipx->ipx_type != IPX_TYPE_PPROP &&
- intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
- /* We only route point-to-point packets. */
- if (skb->pkt_type == PACKET_HOST) {
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (skb)
- rc = ipxrtr_route_skb(skb);
- goto out_intrfc;
- }
-
- goto out_free_skb;
- }
-
- /* see if we should keep it */
- if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
- !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
- rc = ipxitf_demux_socket(intrfc, skb, 0);
- goto out_intrfc;
- }
-
- /* we couldn't pawn it off so unload it */
-out_free_skb:
- kfree_skb(skb);
-out_intrfc:
- ipxitf_put(intrfc);
- return rc;
-}
-
-static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
- struct sk_buff *skb)
-{
- const struct ipx_cb *cb = IPX_SKB_CB(skb);
-
- /* see if this is an intra packet: source_net == dest_net */
- if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
- struct ipx_interface *i =
- ipxitf_find_using_net(cb->ipx_source_net);
- /* NB: NetWare servers lie about their hop count so we
- * dropped the test based on it. This is the best way
- * to determine this is a 0 hop count packet. */
- if (!i) {
- intrfc->if_netnum = cb->ipx_source_net;
- ipxitf_add_local_route(intrfc);
- } else {
- printk(KERN_WARNING "IPX: Network number collision "
- "%lx\n %s %s and %s %s\n",
- (unsigned long) ntohl(cb->ipx_source_net),
- ipx_device_name(i),
- ipx_frame_name(i->if_dlink_type),
- ipx_device_name(intrfc),
- ipx_frame_name(intrfc->if_dlink_type));
- ipxitf_put(i);
- }
- }
-}
-
-/**
- * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
- * NetBIOS broadcasts
- * @intrfc: IPX interface receiving this packet
- * @skb: Received packet
- *
- * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
- * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
- * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
- * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
- * RIP and SAP Router Specification", Part Number 107-000029-001.
- *
- * If it is valid, check if we have pprop broadcasting enabled by the user,
- * if not, just return zero for local processing.
- *
- * If it is enabled check the packet and don't broadcast it if we have already
- * seen this packet.
- *
- * Broadcast: send it to the interfaces that aren't on the packet visited nets
- * array, just after the IPX header.
- *
- * Returns -EINVAL for invalid packets, so that the calling function drops
- * the packet without local processing. 0 if packet is to be locally processed.
- */
-static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
-{
- struct ipxhdr *ipx = ipx_hdr(skb);
- int i, rc = -EINVAL;
- struct ipx_interface *ifcs;
- char *c;
- __be32 *l;
-
- /* Illegal packet - too many hops or too short */
- /* We decide to throw it away: no broadcasting, no local processing.
- * NetBIOS unaware implementations route them as normal packets -
- * tctrl <= 15, any data payload... */
- if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
- ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
- IPX_MAX_PPROP_HOPS * sizeof(u32))
- goto out;
- /* are we broadcasting this damn thing? */
- rc = 0;
- if (!sysctl_ipx_pprop_broadcasting)
- goto out;
- /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
- * process it locally. All previous hops broadcasted it, and process it
- * locally. */
- if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
- goto out;
-
- c = ((u8 *) ipx) + sizeof(struct ipxhdr);
- l = (__be32 *) c;
-
- /* Don't broadcast packet if already seen this net */
- for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
- if (*l++ == intrfc->if_netnum)
- goto out;
-
- /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
- * position where we will insert recvd netnum into list, later on,
- * in ipxitf_send */
- IPX_SKB_CB(skb)->last_hop.index = i;
- IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
- /* xmit on all other interfaces... */
- spin_lock_bh(&ipx_interfaces_lock);
- list_for_each_entry(ifcs, &ipx_interfaces, node) {
- /* Except unconfigured interfaces */
- if (!ifcs->if_netnum)
- continue;
-
- /* That aren't in the list */
- if (ifcs == intrfc)
- continue;
- l = (__be32 *) c;
- /* don't consider the last entry in the packet list,
- * it is our netnum, and it is not there yet */
- for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
- if (ifcs->if_netnum == *l++)
- break;
- if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
- struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
-
- if (s) {
- IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
- ipxrtr_route_skb(s);
- }
- }
- }
- spin_unlock_bh(&ipx_interfaces_lock);
-out:
- return rc;
-}
-
-static void ipxitf_insert(struct ipx_interface *intrfc)
-{
- spin_lock_bh(&ipx_interfaces_lock);
- list_add_tail(&intrfc->node, &ipx_interfaces);
- spin_unlock_bh(&ipx_interfaces_lock);
-
- if (ipxcfg_auto_select_primary && !ipx_primary_net)
- ipx_primary_net = intrfc;
-}
-
-static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
- __be16 dlink_type,
- struct datalink_proto *dlink,
- unsigned char internal,
- int ipx_offset)
-{
- struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
-
- if (intrfc) {
- intrfc->if_dev = dev;
- intrfc->if_netnum = netnum;
- intrfc->if_dlink_type = dlink_type;
- intrfc->if_dlink = dlink;
- intrfc->if_internal = internal;
- intrfc->if_ipx_offset = ipx_offset;
- intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
- INIT_HLIST_HEAD(&intrfc->if_sklist);
- refcount_set(&intrfc->refcnt, 1);
- spin_lock_init(&intrfc->if_sklist_lock);
- }
-
- return intrfc;
-}
-
-static int ipxitf_create_internal(struct ipx_interface_definition *idef)
-{
- struct ipx_interface *intrfc;
- int rc = -EEXIST;
-
- /* Only one primary network allowed */
- if (ipx_primary_net)
- goto out;
-
- /* Must have a valid network number */
- rc = -EADDRNOTAVAIL;
- if (!idef->ipx_network)
- goto out;
- intrfc = ipxitf_find_using_net(idef->ipx_network);
- rc = -EADDRINUSE;
- if (intrfc) {
- ipxitf_put(intrfc);
- goto out;
- }
- intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
- rc = -EAGAIN;
- if (!intrfc)
- goto out;
- memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
- ipx_internal_net = ipx_primary_net = intrfc;
- ipxitf_hold(intrfc);
- ipxitf_insert(intrfc);
-
- rc = ipxitf_add_local_route(intrfc);
- ipxitf_put(intrfc);
-out:
- return rc;
-}
-
-static __be16 ipx_map_frame_type(unsigned char type)
-{
- __be16 rc = 0;
-
- switch (type) {
- case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
- case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
- case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
- case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
- }
-
- return rc;
-}
-
-static int ipxitf_create(struct ipx_interface_definition *idef)
-{
- struct net_device *dev;
- __be16 dlink_type = 0;
- struct datalink_proto *datalink = NULL;
- struct ipx_interface *intrfc;
- int rc;
-
- if (idef->ipx_special == IPX_INTERNAL) {
- rc = ipxitf_create_internal(idef);
- goto out;
- }
-
- rc = -EEXIST;
- if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
- goto out;
-
- intrfc = ipxitf_find_using_net(idef->ipx_network);
- rc = -EADDRINUSE;
- if (idef->ipx_network && intrfc) {
- ipxitf_put(intrfc);
- goto out;
- }
-
- if (intrfc)
- ipxitf_put(intrfc);
-
- dev = dev_get_by_name(&init_net, idef->ipx_device);
- rc = -ENODEV;
- if (!dev)
- goto out;
-
- switch (idef->ipx_dlink_type) {
- case IPX_FRAME_8022:
- dlink_type = htons(ETH_P_802_2);
- datalink = p8022_datalink;
- break;
- case IPX_FRAME_ETHERII:
- if (dev->type != ARPHRD_IEEE802) {
- dlink_type = htons(ETH_P_IPX);
- datalink = pEII_datalink;
- break;
- }
- /* fall through */
- case IPX_FRAME_SNAP:
- dlink_type = htons(ETH_P_SNAP);
- datalink = pSNAP_datalink;
- break;
- case IPX_FRAME_8023:
- dlink_type = htons(ETH_P_802_3);
- datalink = p8023_datalink;
- break;
- case IPX_FRAME_NONE:
- default:
- rc = -EPROTONOSUPPORT;
- goto out_dev;
- }
-
- rc = -ENETDOWN;
- if (!(dev->flags & IFF_UP))
- goto out_dev;
-
- /* Check addresses are suitable */
- rc = -EINVAL;
- if (dev->addr_len > IPX_NODE_LEN)
- goto out_dev;
-
- intrfc = ipxitf_find_using_phys(dev, dlink_type);
- if (!intrfc) {
- /* Ok now create */
- intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
- datalink, 0, dev->hard_header_len +
- datalink->header_length);
- rc = -EAGAIN;
- if (!intrfc)
- goto out_dev;
- /* Setup primary if necessary */
- if (idef->ipx_special == IPX_PRIMARY)
- ipx_primary_net = intrfc;
- if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
- IPX_NODE_LEN)) {
- memset(intrfc->if_node, 0, IPX_NODE_LEN);
- memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
- dev->dev_addr, dev->addr_len);
- } else
- memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
- ipxitf_hold(intrfc);
- ipxitf_insert(intrfc);
- }
-
-
- /* If the network number is known, add a route */
- rc = 0;
- if (!intrfc->if_netnum)
- goto out_intrfc;
-
- rc = ipxitf_add_local_route(intrfc);
-out_intrfc:
- ipxitf_put(intrfc);
- goto out;
-out_dev:
- dev_put(dev);
-out:
- return rc;
-}
-
-static int ipxitf_delete(struct ipx_interface_definition *idef)
-{
- struct net_device *dev = NULL;
- __be16 dlink_type = 0;
- struct ipx_interface *intrfc;
- int rc = 0;
-
- spin_lock_bh(&ipx_interfaces_lock);
- if (idef->ipx_special == IPX_INTERNAL) {
- if (ipx_internal_net) {
- __ipxitf_put(ipx_internal_net);
- goto out;
- }
- rc = -ENOENT;
- goto out;
- }
-
- dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
- rc = -EPROTONOSUPPORT;
- if (!dlink_type)
- goto out;
-
- dev = __dev_get_by_name(&init_net, idef->ipx_device);
- rc = -ENODEV;
- if (!dev)
- goto out;
-
- intrfc = __ipxitf_find_using_phys(dev, dlink_type);
- rc = -EINVAL;
- if (!intrfc)
- goto out;
- __ipxitf_put(intrfc);
-
- rc = 0;
-out:
- spin_unlock_bh(&ipx_interfaces_lock);
- return rc;
-}
-
-static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
- __be16 dlink_type)
-{
- struct ipx_interface *intrfc = NULL;
- struct datalink_proto *datalink;
-
- if (!dev)
- goto out;
-
- /* Check addresses are suitable */
- if (dev->addr_len > IPX_NODE_LEN)
- goto out;
-
- switch (ntohs(dlink_type)) {
- case ETH_P_IPX: datalink = pEII_datalink; break;
- case ETH_P_802_2: datalink = p8022_datalink; break;
- case ETH_P_SNAP: datalink = pSNAP_datalink; break;
- case ETH_P_802_3: datalink = p8023_datalink; break;
- default: goto out;
- }
-
- intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
- dev->hard_header_len + datalink->header_length);
-
- if (intrfc) {
- memset(intrfc->if_node, 0, IPX_NODE_LEN);
- memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
- dev->dev_addr, dev->addr_len);
- spin_lock_init(&intrfc->if_sklist_lock);
- refcount_set(&intrfc->refcnt, 1);
- ipxitf_insert(intrfc);
- dev_hold(dev);
- }
-
-out:
- return intrfc;
-}
-
-static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
-{
- int rc = -EINVAL;
- struct ifreq ifr;
- int val;
-
- switch (cmd) {
- case SIOCSIFADDR: {
- struct sockaddr_ipx *sipx;
- struct ipx_interface_definition f;
-
- rc = -EFAULT;
- if (copy_from_user(&ifr, arg, sizeof(ifr)))
- break;
- sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
- rc = -EINVAL;
- if (sipx->sipx_family != AF_IPX)
- break;
- f.ipx_network = sipx->sipx_network;
- memcpy(f.ipx_device, ifr.ifr_name,
- sizeof(f.ipx_device));
- memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
- f.ipx_dlink_type = sipx->sipx_type;
- f.ipx_special = sipx->sipx_special;
-
- if (sipx->sipx_action == IPX_DLTITF)
- rc = ipxitf_delete(&f);
- else
- rc = ipxitf_create(&f);
- break;
- }
- case SIOCGIFADDR: {
- struct sockaddr_ipx *sipx;
- struct ipx_interface *ipxif;
- struct net_device *dev;
-
- rc = -EFAULT;
- if (copy_from_user(&ifr, arg, sizeof(ifr)))
- break;
- sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
- dev = __dev_get_by_name(&init_net, ifr.ifr_name);
- rc = -ENODEV;
- if (!dev)
- break;
- ipxif = ipxitf_find_using_phys(dev,
- ipx_map_frame_type(sipx->sipx_type));
- rc = -EADDRNOTAVAIL;
- if (!ipxif)
- break;
-
- sipx->sipx_family = AF_IPX;
- sipx->sipx_network = ipxif->if_netnum;
- memcpy(sipx->sipx_node, ipxif->if_node,
- sizeof(sipx->sipx_node));
- rc = 0;
- if (copy_to_user(arg, &ifr, sizeof(ifr)))
- rc = -EFAULT;
- ipxitf_put(ipxif);
- break;
- }
- case SIOCAIPXITFCRT:
- rc = -EFAULT;
- if (get_user(val, (unsigned char __user *) arg))
- break;
- rc = 0;
- ipxcfg_auto_create_interfaces = val;
- break;
- case SIOCAIPXPRISLT:
- rc = -EFAULT;
- if (get_user(val, (unsigned char __user *) arg))
- break;
- rc = 0;
- ipxcfg_set_auto_select(val);
- break;
- }
-
- return rc;
-}
-
-/*
- * Checksum routine for IPX
- */
-
-/* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
-/* This functions should *not* mess with packet contents */
-
-__be16 ipx_cksum(struct ipxhdr *packet, int length)
-{
- /*
- * NOTE: sum is a net byte order quantity, which optimizes the
- * loop. This only works on big and little endian machines. (I
- * don't know of a machine that isn't.)
- */
- /* handle the first 3 words separately; checksum should be skipped
- * and ipx_tctrl masked out */
- __u16 *p = (__u16 *)packet;
- __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
- __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
-
- /* Loop through them */
- p += 3;
- while (i--)
- sum += *p++;
-
- /* Add on the last part word if it exists */
- if (packet->ipx_pktsize & htons(1))
- sum += (__force u16)htons(0xff00) & *p;
-
- /* Do final fixup */
- sum = (sum & 0xffff) + (sum >> 16);
-
- /* It's a pity there's no concept of carry in C */
- if (sum >= 0x10000)
- sum++;
-
- /*
- * Leave 0 alone; we don't want 0xffff here. Note that we can't get
- * here with 0x10000, so this check is the same as ((__u16)sum)
- */
- if (sum)
- sum = ~sum;
-
- return (__force __be16)sum;
-}
-
-const char *ipx_frame_name(__be16 frame)
-{
- char* rc = "None";
-
- switch (ntohs(frame)) {
- case ETH_P_IPX: rc = "EtherII"; break;
- case ETH_P_802_2: rc = "802.2"; break;
- case ETH_P_SNAP: rc = "SNAP"; break;
- case ETH_P_802_3: rc = "802.3"; break;
- }
-
- return rc;
-}
-
-const char *ipx_device_name(struct ipx_interface *intrfc)
-{
- return intrfc->if_internal ? "Internal" :
- intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
-}
-
-/* Handling for system calls applied via the various interfaces to an IPX
- * socket object. */
-
-static int ipx_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- int opt;
- int rc = -EINVAL;
-
- lock_sock(sk);
- if (optlen != sizeof(int))
- goto out;
-
- rc = -EFAULT;
- if (get_user(opt, (unsigned int __user *)optval))
- goto out;
-
- rc = -ENOPROTOOPT;
- if (!(level == SOL_IPX && optname == IPX_TYPE))
- goto out;
-
- ipx_sk(sk)->type = opt;
- rc = 0;
-out:
- release_sock(sk);
- return rc;
-}
-
-static int ipx_getsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- struct sock *sk = sock->sk;
- int val = 0;
- int len;
- int rc = -ENOPROTOOPT;
-
- lock_sock(sk);
- if (!(level == SOL_IPX && optname == IPX_TYPE))
- goto out;
-
- val = ipx_sk(sk)->type;
-
- rc = -EFAULT;
- if (get_user(len, optlen))
- goto out;
-
- len = min_t(unsigned int, len, sizeof(int));
- rc = -EINVAL;
- if(len < 0)
- goto out;
-
- rc = -EFAULT;
- if (put_user(len, optlen) || copy_to_user(optval, &val, len))
- goto out;
-
- rc = 0;
-out:
- release_sock(sk);
- return rc;
-}
-
-static struct proto ipx_proto = {
- .name = "IPX",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct ipx_sock),
-};
-
-static int ipx_create(struct net *net, struct socket *sock, int protocol,
- int kern)
-{
- int rc = -ESOCKTNOSUPPORT;
- struct sock *sk;
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
- /*
- * SPX support is not anymore in the kernel sources. If you want to
- * ressurrect it, completing it and making it understand shared skbs,
- * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
- * tree.
- */
- if (sock->type != SOCK_DGRAM)
- goto out;
-
- rc = -ENOMEM;
- sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto, kern);
- if (!sk)
- goto out;
-
- sk_refcnt_debug_inc(sk);
- sock_init_data(sock, sk);
- sk->sk_no_check_tx = 1; /* Checksum off by default */
- sock->ops = &ipx_dgram_ops;
- rc = 0;
-out:
- return rc;
-}
-
-static int ipx_release(struct socket *sock)
-{
- struct sock *sk = sock->sk;
-
- if (!sk)
- goto out;
-
- lock_sock(sk);
- sk->sk_shutdown = SHUTDOWN_MASK;
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
-
- sock_set_flag(sk, SOCK_DEAD);
- sock->sk = NULL;
- sk_refcnt_debug_release(sk);
- ipx_destroy_socket(sk);
- release_sock(sk);
- sock_put(sk);
-out:
- return 0;
-}
-
-/* caller must hold a reference to intrfc */
-
-static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
-{
- unsigned short socketNum = intrfc->if_sknum;
-
- spin_lock_bh(&intrfc->if_sklist_lock);
-
- if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
- socketNum = IPX_MIN_EPHEMERAL_SOCKET;
-
- while (__ipxitf_find_socket(intrfc, htons(socketNum)))
- if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
- socketNum = IPX_MIN_EPHEMERAL_SOCKET;
- else
- socketNum++;
-
- spin_unlock_bh(&intrfc->if_sklist_lock);
- intrfc->if_sknum = socketNum;
-
- return htons(socketNum);
-}
-
-static int __ipx_bind(struct socket *sock,
- struct sockaddr *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- struct ipx_sock *ipxs = ipx_sk(sk);
- struct ipx_interface *intrfc;
- struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
- int rc = -EINVAL;
-
- if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
- goto out;
-
- intrfc = ipxitf_find_using_net(addr->sipx_network);
- rc = -EADDRNOTAVAIL;
- if (!intrfc)
- goto out;
-
- if (!addr->sipx_port) {
- addr->sipx_port = ipx_first_free_socketnum(intrfc);
- rc = -EINVAL;
- if (!addr->sipx_port)
- goto out_put;
- }
-
- /* protect IPX system stuff like routing/sap */
- rc = -EACCES;
- if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
- !capable(CAP_NET_ADMIN))
- goto out_put;
-
- ipxs->port = addr->sipx_port;
-
-#ifdef CONFIG_IPX_INTERN
- if (intrfc == ipx_internal_net) {
- /* The source address is to be set explicitly if the
- * socket is to be bound on the internal network. If a
- * node number 0 was specified, the default is used.
- */
-
- rc = -EINVAL;
- if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
- goto out_put;
- if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
- memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
- else
- memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
-
- rc = -EADDRINUSE;
- if (ipxitf_find_internal_socket(intrfc, ipxs->node,
- ipxs->port)) {
- SOCK_DEBUG(sk,
- "IPX: bind failed because port %X in use.\n",
- ntohs(addr->sipx_port));
- goto out_put;
- }
- } else {
- /* Source addresses are easy. It must be our
- * network:node pair for an interface routed to IPX
- * with the ipx routing ioctl()
- */
-
- memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
-
- rc = -EADDRINUSE;
- if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
- SOCK_DEBUG(sk,
- "IPX: bind failed because port %X in use.\n",
- ntohs(addr->sipx_port));
- goto out_put;
- }
- }
-
-#else /* !def CONFIG_IPX_INTERN */
-
- /* Source addresses are easy. It must be our network:node pair for
- an interface routed to IPX with the ipx routing ioctl() */
-
- rc = -EADDRINUSE;
- if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
- SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
- ntohs((int)addr->sipx_port));
- goto out_put;
- }
-
-#endif /* CONFIG_IPX_INTERN */
-
- ipxitf_insert_socket(intrfc, sk);
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- rc = 0;
-out_put:
- ipxitf_put(intrfc);
-out:
- return rc;
-}
-
-static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- int rc;
-
- lock_sock(sk);
- rc = __ipx_bind(sock, uaddr, addr_len);
- release_sock(sk);
-
- return rc;
-}
-
-static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
- int addr_len, int flags)
-{
- struct sock *sk = sock->sk;
- struct ipx_sock *ipxs = ipx_sk(sk);
- struct sockaddr_ipx *addr;
- int rc = -EINVAL;
- struct ipx_route *rt;
-
- sk->sk_state = TCP_CLOSE;
- sock->state = SS_UNCONNECTED;
-
- lock_sock(sk);
- if (addr_len != sizeof(*addr))
- goto out;
- addr = (struct sockaddr_ipx *)uaddr;
-
- /* put the autobinding in */
- if (!ipxs->port) {
- struct sockaddr_ipx uaddr;
-
- uaddr.sipx_port = 0;
- uaddr.sipx_network = 0;
-
-#ifdef CONFIG_IPX_INTERN
- rc = -ENETDOWN;
- if (!ipxs->intrfc)
- goto out; /* Someone zonked the iface */
- memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
- IPX_NODE_LEN);
-#endif /* CONFIG_IPX_INTERN */
-
- rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
- sizeof(struct sockaddr_ipx));
- if (rc)
- goto out;
- }
-
- /* We can either connect to primary network or somewhere
- * we can route to */
- rt = ipxrtr_lookup(addr->sipx_network);
- rc = -ENETUNREACH;
- if (!rt && !(!addr->sipx_network && ipx_primary_net))
- goto out;
-
- ipxs->dest_addr.net = addr->sipx_network;
- ipxs->dest_addr.sock = addr->sipx_port;
- memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
- ipxs->type = addr->sipx_type;
-
- if (sock->type == SOCK_DGRAM) {
- sock->state = SS_CONNECTED;
- sk->sk_state = TCP_ESTABLISHED;
- }
-
- if (rt)
- ipxrtr_put(rt);
- rc = 0;
-out:
- release_sock(sk);
- return rc;
-}
-
-
-static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
- int peer)
-{
- struct ipx_address *addr;
- struct sockaddr_ipx sipx;
- struct sock *sk = sock->sk;
- struct ipx_sock *ipxs = ipx_sk(sk);
- int rc;
-
- lock_sock(sk);
- if (peer) {
- rc = -ENOTCONN;
- if (sk->sk_state != TCP_ESTABLISHED)
- goto out;
-
- addr = &ipxs->dest_addr;
- sipx.sipx_network = addr->net;
- sipx.sipx_port = addr->sock;
- memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
- } else {
- if (ipxs->intrfc) {
- sipx.sipx_network = ipxs->intrfc->if_netnum;
-#ifdef CONFIG_IPX_INTERN
- memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
-#else
- memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
- IPX_NODE_LEN);
-#endif /* CONFIG_IPX_INTERN */
-
- } else {
- sipx.sipx_network = 0;
- memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
- }
-
- sipx.sipx_port = ipxs->port;
- }
-
- sipx.sipx_family = AF_IPX;
- sipx.sipx_type = ipxs->type;
- sipx.sipx_zero = 0;
- memcpy(uaddr, &sipx, sizeof(sipx));
-
- rc = sizeof(struct sockaddr_ipx);
-out:
- release_sock(sk);
- return rc;
-}
-
-static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
-{
- /* NULL here for pt means the packet was looped back */
- struct ipx_interface *intrfc;
- struct ipxhdr *ipx;
- u16 ipx_pktsize;
- int rc = 0;
-
- if (!net_eq(dev_net(dev), &init_net))
- goto drop;
-
- /* Not ours */
- if (skb->pkt_type == PACKET_OTHERHOST)
- goto drop;
-
- if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
- goto out;
-
- if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
- goto drop;
-
- ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
-
- /* Too small or invalid header? */
- if (ipx_pktsize < sizeof(struct ipxhdr) ||
- !pskb_may_pull(skb, ipx_pktsize))
- goto drop;
-
- ipx = ipx_hdr(skb);
- if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
- ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
- goto drop;
-
- IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
- IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
- IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
-
- /* Determine what local ipx endpoint this is */
- intrfc = ipxitf_find_using_phys(dev, pt->type);
- if (!intrfc) {
- if (ipxcfg_auto_create_interfaces &&
- IPX_SKB_CB(skb)->ipx_dest_net) {
- intrfc = ipxitf_auto_create(dev, pt->type);
- if (intrfc)
- ipxitf_hold(intrfc);
- }
-
- if (!intrfc) /* Not one of ours */
- /* or invalid packet for auto creation */
- goto drop;
- }
-
- rc = ipxitf_rcv(intrfc, skb);
- ipxitf_put(intrfc);
- goto out;
-drop:
- kfree_skb(skb);
-out:
- return rc;
-}
-
-static int ipx_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
-{
- struct sock *sk = sock->sk;
- struct ipx_sock *ipxs = ipx_sk(sk);
- DECLARE_SOCKADDR(struct sockaddr_ipx *, usipx, msg->msg_name);
- struct sockaddr_ipx local_sipx;
- int rc = -EINVAL;
- int flags = msg->msg_flags;
-
- lock_sock(sk);
- /* Socket gets bound below anyway */
-/* if (sk->sk_zapped)
- return -EIO; */ /* Socket not bound */
- if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
- goto out;
-
- /* Max possible packet size limited by 16 bit pktsize in header */
- if (len >= 65535 - sizeof(struct ipxhdr))
- goto out;
-
- if (usipx) {
- if (!ipxs->port) {
- struct sockaddr_ipx uaddr;
-
- uaddr.sipx_port = 0;
- uaddr.sipx_network = 0;
-#ifdef CONFIG_IPX_INTERN
- rc = -ENETDOWN;
- if (!ipxs->intrfc)
- goto out; /* Someone zonked the iface */
- memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
- IPX_NODE_LEN);
-#endif
- rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
- sizeof(struct sockaddr_ipx));
- if (rc)
- goto out;
- }
-
- rc = -EINVAL;
- if (msg->msg_namelen < sizeof(*usipx) ||
- usipx->sipx_family != AF_IPX)
- goto out;
- } else {
- rc = -ENOTCONN;
- if (sk->sk_state != TCP_ESTABLISHED)
- goto out;
-
- usipx = &local_sipx;
- usipx->sipx_family = AF_IPX;
- usipx->sipx_type = ipxs->type;
- usipx->sipx_port = ipxs->dest_addr.sock;
- usipx->sipx_network = ipxs->dest_addr.net;
- memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
- }
-
- rc = ipxrtr_route_packet(sk, usipx, msg, len, flags & MSG_DONTWAIT);
- if (rc >= 0)
- rc = len;
-out:
- release_sock(sk);
- return rc;
-}
-
-
-static int ipx_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
- int flags)
-{
- struct sock *sk = sock->sk;
- struct ipx_sock *ipxs = ipx_sk(sk);
- DECLARE_SOCKADDR(struct sockaddr_ipx *, sipx, msg->msg_name);
- struct ipxhdr *ipx = NULL;
- struct sk_buff *skb;
- int copied, rc;
- bool locked = true;
-
- lock_sock(sk);
- /* put the autobinding in */
- if (!ipxs->port) {
- struct sockaddr_ipx uaddr;
-
- uaddr.sipx_port = 0;
- uaddr.sipx_network = 0;
-
-#ifdef CONFIG_IPX_INTERN
- rc = -ENETDOWN;
- if (!ipxs->intrfc)
- goto out; /* Someone zonked the iface */
- memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
-#endif /* CONFIG_IPX_INTERN */
-
- rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
- sizeof(struct sockaddr_ipx));
- if (rc)
- goto out;
- }
-
- rc = -ENOTCONN;
- if (sock_flag(sk, SOCK_ZAPPED))
- goto out;
-
- release_sock(sk);
- locked = false;
- skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
- flags & MSG_DONTWAIT, &rc);
- if (!skb) {
- if (rc == -EAGAIN && (sk->sk_shutdown & RCV_SHUTDOWN))
- rc = 0;
- goto out;
- }
-
- ipx = ipx_hdr(skb);
- copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
- if (copied > size) {
- copied = size;
- msg->msg_flags |= MSG_TRUNC;
- }
-
- rc = skb_copy_datagram_msg(skb, sizeof(struct ipxhdr), msg, copied);
- if (rc)
- goto out_free;
- if (skb->tstamp)
- sk->sk_stamp = skb->tstamp;
-
- if (sipx) {
- sipx->sipx_family = AF_IPX;
- sipx->sipx_port = ipx->ipx_source.sock;
- memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
- sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
- sipx->sipx_type = ipx->ipx_type;
- sipx->sipx_zero = 0;
- msg->msg_namelen = sizeof(*sipx);
- }
- rc = copied;
-
-out_free:
- skb_free_datagram(sk, skb);
-out:
- if (locked)
- release_sock(sk);
- return rc;
-}
-
-
-static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- int rc = 0;
- long amount = 0;
- struct sock *sk = sock->sk;
- void __user *argp = (void __user *)arg;
-
- lock_sock(sk);
- switch (cmd) {
- case TIOCOUTQ:
- amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
- if (amount < 0)
- amount = 0;
- rc = put_user(amount, (int __user *)argp);
- break;
- case TIOCINQ: {
- struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
- /* These two are safe on a single CPU system as only
- * user tasks fiddle here */
- if (skb)
- amount = skb->len - sizeof(struct ipxhdr);
- rc = put_user(amount, (int __user *)argp);
- break;
- }
- case SIOCADDRT:
- case SIOCDELRT:
- rc = -EPERM;
- if (capable(CAP_NET_ADMIN))
- rc = ipxrtr_ioctl(cmd, argp);
- break;
- case SIOCSIFADDR:
- case SIOCAIPXITFCRT:
- case SIOCAIPXPRISLT:
- rc = -EPERM;
- if (!capable(CAP_NET_ADMIN))
- break;
- /* fall through */
- case SIOCGIFADDR:
- rc = ipxitf_ioctl(cmd, argp);
- break;
- case SIOCIPXCFGDATA:
- rc = ipxcfg_get_config_data(argp);
- break;
- case SIOCIPXNCPCONN:
- /*
- * This socket wants to take care of the NCP connection
- * handed to us in arg.
- */
- rc = -EPERM;
- if (!capable(CAP_NET_ADMIN))
- break;
- rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
- (const unsigned short __user *)argp);
- break;
- case SIOCGSTAMP:
- rc = sock_get_timestamp(sk, argp);
- break;
- case SIOCGIFDSTADDR:
- case SIOCSIFDSTADDR:
- case SIOCGIFBRDADDR:
- case SIOCSIFBRDADDR:
- case SIOCGIFNETMASK:
- case SIOCSIFNETMASK:
- rc = -EINVAL;
- break;
- default:
- rc = -ENOIOCTLCMD;
- break;
- }
- release_sock(sk);
-
- return rc;
-}
-
-
-#ifdef CONFIG_COMPAT
-static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- /*
- * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
- * commands is handled by generic ioctl code. As these commands are
- * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
- * code.
- */
- switch (cmd) {
- case SIOCAIPXITFCRT:
- case SIOCAIPXPRISLT:
- case SIOCIPXCFGDATA:
- case SIOCIPXNCPCONN:
- return ipx_ioctl(sock, cmd, arg);
- default:
- return -ENOIOCTLCMD;
- }
-}
-#endif
-
-static int ipx_shutdown(struct socket *sock, int mode)
-{
- struct sock *sk = sock->sk;
-
- if (mode < SHUT_RD || mode > SHUT_RDWR)
- return -EINVAL;
- /* This maps:
- * SHUT_RD (0) -> RCV_SHUTDOWN (1)
- * SHUT_WR (1) -> SEND_SHUTDOWN (2)
- * SHUT_RDWR (2) -> SHUTDOWN_MASK (3)
- */
- ++mode;
-
- lock_sock(sk);
- sk->sk_shutdown |= mode;
- release_sock(sk);
- sk->sk_state_change(sk);
-
- return 0;
-}
-
-/*
- * Socket family declarations
- */
-
-static const struct net_proto_family ipx_family_ops = {
- .family = PF_IPX,
- .create = ipx_create,
- .owner = THIS_MODULE,
-};
-
-static const struct proto_ops ipx_dgram_ops = {
- .family = PF_IPX,
- .owner = THIS_MODULE,
- .release = ipx_release,
- .bind = ipx_bind,
- .connect = ipx_connect,
- .socketpair = sock_no_socketpair,
- .accept = sock_no_accept,
- .getname = ipx_getname,
- .poll = datagram_poll,
- .ioctl = ipx_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = ipx_compat_ioctl,
-#endif
- .listen = sock_no_listen,
- .shutdown = ipx_shutdown,
- .setsockopt = ipx_setsockopt,
- .getsockopt = ipx_getsockopt,
- .sendmsg = ipx_sendmsg,
- .recvmsg = ipx_recvmsg,
- .mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
-};
-
-static struct packet_type ipx_8023_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_802_3),
- .func = ipx_rcv,
-};
-
-static struct packet_type ipx_dix_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_IPX),
- .func = ipx_rcv,
-};
-
-static struct notifier_block ipx_dev_notifier = {
- .notifier_call = ipxitf_device_event,
-};
-
-static const unsigned char ipx_8022_type = 0xE0;
-static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
-static const char ipx_EII_err_msg[] __initconst =
- KERN_CRIT "IPX: Unable to register with Ethernet II\n";
-static const char ipx_8023_err_msg[] __initconst =
- KERN_CRIT "IPX: Unable to register with 802.3\n";
-static const char ipx_llc_err_msg[] __initconst =
- KERN_CRIT "IPX: Unable to register with 802.2\n";
-static const char ipx_snap_err_msg[] __initconst =
- KERN_CRIT "IPX: Unable to register with SNAP\n";
-
-static int __init ipx_init(void)
-{
- int rc = proto_register(&ipx_proto, 1);
-
- if (rc != 0)
- goto out;
-
- sock_register(&ipx_family_ops);
-
- pEII_datalink = make_EII_client();
- if (pEII_datalink)
- dev_add_pack(&ipx_dix_packet_type);
- else
- printk(ipx_EII_err_msg);
-
- p8023_datalink = make_8023_client();
- if (p8023_datalink)
- dev_add_pack(&ipx_8023_packet_type);
- else
- printk(ipx_8023_err_msg);
-
- p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
- if (!p8022_datalink)
- printk(ipx_llc_err_msg);
-
- pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
- if (!pSNAP_datalink)
- printk(ipx_snap_err_msg);
-
- register_netdevice_notifier(&ipx_dev_notifier);
- ipx_register_sysctl();
- ipx_proc_init();
-out:
- return rc;
-}
-
-static void __exit ipx_proto_finito(void)
-{
- ipx_proc_exit();
- ipx_unregister_sysctl();
-
- unregister_netdevice_notifier(&ipx_dev_notifier);
-
- ipxitf_cleanup();
-
- if (pSNAP_datalink) {
- unregister_snap_client(pSNAP_datalink);
- pSNAP_datalink = NULL;
- }
-
- if (p8022_datalink) {
- unregister_8022_client(p8022_datalink);
- p8022_datalink = NULL;
- }
-
- dev_remove_pack(&ipx_8023_packet_type);
- if (p8023_datalink) {
- destroy_8023_client(p8023_datalink);
- p8023_datalink = NULL;
- }
-
- dev_remove_pack(&ipx_dix_packet_type);
- if (pEII_datalink) {
- destroy_EII_client(pEII_datalink);
- pEII_datalink = NULL;
- }
-
- proto_unregister(&ipx_proto);
- sock_unregister(ipx_family_ops.family);
-}
-
-module_init(ipx_init);
-module_exit(ipx_proto_finito);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_IPX);
projects / openwrt / staging / blogic.git / commitdiff