| /* |
| * 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 <asm/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 (atomic_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); |
| atomic_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); |
| atomic_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 = -EFAULT; |
| if (copy_to_user(arg, &ifr, sizeof(ifr))) |
| break; |
| ipxitf_put(ipxif); |
| rc = 0; |
| 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); |
| 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 *uaddr_len, int peer) |
| { |
| struct ipx_address *addr; |
| struct sockaddr_ipx sipx; |
| struct sock *sk = sock->sk; |
| struct ipx_sock *ipxs = ipx_sk(sk); |
| int rc; |
| |
| *uaddr_len = sizeof(struct sockaddr_ipx); |
| |
| 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 = 0; |
| 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 kiocb *iocb, 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->msg_iov, len, |
| flags & MSG_DONTWAIT); |
| if (rc >= 0) |
| rc = len; |
| out: |
| release_sock(sk); |
| return rc; |
| } |
| |
| |
| static int ipx_recvmsg(struct kiocb *iocb, 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; |
| |
| 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; |
| |
| 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_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov, |
| copied); |
| if (rc) |
| goto out_free; |
| if (skb->tstamp.tv64) |
| 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: |
| 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; |
| 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); |