/* * 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. * * Revision 0.21: Uses the new generic socket option code. * Revision 0.22: Gcc clean ups and drop out device registration. Use the * new multi-protocol edition of hard_header * Revision 0.23: IPX /proc by Mark Evans. Adding a route will * will overwrite any existing route to the same network. * Revision 0.24: Supports new /proc with no 4K limit * Revision 0.25: Add ephemeral sockets, passive local network * identification, support for local net 0 and * multiple datalinks * Revision 0.26: Device drop kills IPX routes via it. (needed for module) * Revision 0.27: Autobind * Revision 0.28: Small fix for multiple local networks * Revision 0.29: Assorted major errors removed * Small correction to promisc mode error fix * Asynchronous I/O support. Changed to use notifiers * and the newer packet_type stuff. Assorted major * fixes * Revision 0.30: Moved to net/ipx/... * Don't set address length on recvfrom that errors. * Incorrect verify_area. * Revision 0.31: New sk_buffs. This still needs a lot of * testing. * Revision 0.32: Using sock_alloc_send_skb, firewall hooks. * Supports sendmsg/recvmsg * Revision 0.33: Internal network support, routing changes, uses a * protocol private area for ipx data. * Revision 0.34: Module support. * Revision 0.35: Checksum support. , hooked in by * Handles WIN95 discovery packets * Revision 0.36: Internal bump up for 2.1 * Revision 0.37: Began adding POSIXisms. * Revision 0.38: Asynchronous socket stuff made current. * Revision 0.39: SPX interfaces * Revision 0.40: Tiny SIOCGSTAMP fix (chris@cybernet.co.nz) * Revision 0.41: 802.2TR removed (p.norton@computer.org) * Fixed connecting to primary net, * Automatic binding on send & receive, * Martijn van Oosterhout * Revision 042: Multithreading - use spinlocks and refcounting to * protect some structures: ipx_interface sock list, list * of ipx interfaces, etc. * Bugfixes - do refcounting on net_devices, check function * results, etc. Thanks to davem and freitag for * suggestions and guidance. * Arnaldo Carvalho de Melo , * November, 2000 * Revision 043: Shared SKBs, don't mangle packets, some cleanups * Arnaldo Carvalho de Melo , * December, 2000 * Revision 044: Call ipxitf_hold on NETDEV_UP (acme) * Revision 045: fix PPROP routing bug (acme) * Revision 046: Further fixes to PPROP, ipxitf_create_internal was * doing an unneeded MOD_INC_USE_COUNT, implement * sysctl for ipx_pprop_broacasting, fix the ipx sysctl * handling, making it dynamic, some cleanups, thanks to * Petr Vandrovec for review and good suggestions. (acme) * Revision 047: Cleanups, CodingStyle changes, move the ncp connection * hack out of line (acme) * * Protect the module by a MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT * pair. Also, now usage count is managed this way * -Count one if the auto_interface mode is on * -Count one per configured interface * * Jacques Gelinas (jacques@solucorp.qc.ca) * * * Portions Copyright (c) 1995 Caldera, Inc. * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* For TIOCOUTQ/INQ */ #include #include #include #include #include #include #include #ifdef CONFIG_SYSCTL extern void ipx_register_sysctl(void); extern void ipx_unregister_sysctl(void); #else #define ipx_register_sysctl() #define ipx_unregister_sysctl() #endif /* 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 struct proto_ops ipx_dgram_ops; static struct net_proto_family *spx_family_ops; static ipx_route *ipx_routes; static rwlock_t ipx_routes_lock = RW_LOCK_UNLOCKED; static ipx_interface *ipx_interfaces; static spinlock_t ipx_interfaces_lock = SPIN_LOCK_UNLOCKED; static ipx_interface *ipx_primary_net; static ipx_interface *ipx_internal_net; #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0])) #undef IPX_REFCNT_DEBUG #ifdef IPX_REFCNT_DEBUG atomic_t ipx_sock_nr; #endif static void ipxcfg_set_auto_create(char val) { if (ipxcfg_auto_create_interfaces != val) { if (val) MOD_INC_USE_COUNT; else MOD_DEC_USE_COUNT; ipxcfg_auto_create_interfaces = val; } } static void ipxcfg_set_auto_select(char val) { ipxcfg_auto_select_primary = val; if (val && !ipx_primary_net) ipx_primary_net = ipx_interfaces; } static int ipxcfg_get_config_data(ipx_config_data *arg) { 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; } /* Handlers for the socket list. */ static inline void ipxitf_hold(ipx_interface *intrfc) { atomic_inc(&intrfc->refcnt); } static void ipxitf_down(ipx_interface *intrfc); static inline void ipxitf_put(ipx_interface *intrfc) { if (atomic_dec_and_test(&intrfc->refcnt)) ipxitf_down(intrfc); } static void __ipxitf_down(ipx_interface *intrfc); static inline void __ipxitf_put(ipx_interface *intrfc) { if (atomic_dec_and_test(&intrfc->refcnt)) __ipxitf_down(intrfc); } /* * 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. */ void ipx_remove_socket(struct sock *sk) { struct sock *s; ipx_interface *intrfc; /* Determine interface with which socket is associated */ intrfc = sk->protinfo.af_ipx.intrfc; if (!intrfc) goto out; ipxitf_hold(intrfc); spin_lock_bh(&intrfc->if_sklist_lock); s = intrfc->if_sklist; if (s == sk) { intrfc->if_sklist = s->next; goto out_unlock; } while (s && s->next) { if (s->next == sk) { s->next = sk->next; goto out_unlock; } s = s->next; } out_unlock: spin_unlock_bh(&intrfc->if_sklist_lock); sock_put(sk); ipxitf_put(intrfc); out: return; } static void ipx_destroy_socket(struct sock *sk) { ipx_remove_socket(sk); skb_queue_purge(&sk->receive_queue); #ifdef IPX_REFCNT_DEBUG atomic_dec(&ipx_sock_nr); printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk, atomic_read(&ipx_sock_nr)); if (atomic_read(&sk->refcnt) != 1) printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n", sk, atomic_read(&sk->refcnt)); #endif sock_put(sk); } /* * The following code is used to support IPX Interfaces (IPXITF). An * IPX interface is defined by a physical device and a frame type. */ static ipx_route * ipxrtr_lookup(__u32); /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */ static void ipxitf_clear_primary_net(void) { ipx_primary_net = ipxcfg_auto_select_primary ? ipx_interfaces : NULL; } static ipx_interface *__ipxitf_find_using_phys(struct net_device *dev, unsigned short datalink) { ipx_interface *i = ipx_interfaces; while (i && (i->if_dev != dev || i->if_dlink_type != datalink)) i = i->if_next; return i; } static ipx_interface *ipxitf_find_using_phys(struct net_device *dev, unsigned short datalink) { 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; } static ipx_interface *ipxitf_find_using_net(__u32 net) { ipx_interface *i; spin_lock_bh(&ipx_interfaces_lock); if (net) for (i = ipx_interfaces; i && i->if_netnum != net; i = i->if_next) ; else i = ipx_primary_net; if (i) ipxitf_hold(i); spin_unlock_bh(&ipx_interfaces_lock); return i; } /* Sockets are bound to a particular IPX interface. */ static void ipxitf_insert_socket(ipx_interface *intrfc, struct sock *sk) { ipxitf_hold(intrfc); sock_hold(sk); spin_lock_bh(&intrfc->if_sklist_lock); sk->protinfo.af_ipx.intrfc = intrfc; sk->next = NULL; if (!intrfc->if_sklist) intrfc->if_sklist = sk; else { struct sock *s = intrfc->if_sklist; while (s->next) s = s->next; s->next = sk; } spin_unlock_bh(&intrfc->if_sklist_lock); ipxitf_put(intrfc); } /* caller must hold intrfc->if_sklist_lock */ static struct sock *__ipxitf_find_socket(ipx_interface *intrfc, unsigned short port) { struct sock *s = intrfc->if_sklist; while (s && s->protinfo.af_ipx.port != port) s = s->next; return s; } /* caller must hold a reference to intrfc */ static struct sock *ipxitf_find_socket(ipx_interface *intrfc, unsigned short 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(ipx_interface *intrfc, unsigned char *node, unsigned short port) { struct sock *s; ipxitf_hold(intrfc); spin_lock_bh(&intrfc->if_sklist_lock); s = intrfc->if_sklist; while (s) { if (s->protinfo.af_ipx.port == port && !memcmp(node, s->protinfo.af_ipx.node, IPX_NODE_LEN)) break; s = s->next; } spin_unlock_bh(&intrfc->if_sklist_lock); ipxitf_put(intrfc); return s; } #endif static void ipxrtr_del_routes(ipx_interface *); static void __ipxitf_down(ipx_interface *intrfc) { struct sock *s, *t; /* Delete all routes associated with this interface */ ipxrtr_del_routes(intrfc); spin_lock_bh(&intrfc->if_sklist_lock); /* error sockets */ for (s = intrfc->if_sklist; s;) { s->err = ENOLINK; s->error_report(s); s->protinfo.af_ipx.intrfc = NULL; s->protinfo.af_ipx.port = 0; s->zapped = 1; /* Indicates it is no longer bound */ t = s; s = s->next; t->next = NULL; } intrfc->if_sklist = NULL; spin_unlock_bh(&intrfc->if_sklist_lock); /* remove this interface from list */ if (intrfc == ipx_interfaces) ipx_interfaces = intrfc->if_next; else { ipx_interface *i = ipx_interfaces; while (i && i->if_next != intrfc) i = i->if_next; if (i && i->if_next == intrfc) i->if_next = intrfc->if_next; } /* 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); MOD_DEC_USE_COUNT; } static void ipxitf_down(ipx_interface *intrfc) { spin_lock_bh(&ipx_interfaces_lock); __ipxitf_down(intrfc); spin_unlock_bh(&ipx_interfaces_lock); } static int ipxitf_device_event(struct notifier_block *notifier, unsigned long event, void *ptr) { struct net_device *dev = ptr; ipx_interface *i, *tmp; if (event != NETDEV_DOWN && event != NETDEV_UP) goto out; spin_lock_bh(&ipx_interfaces_lock); for (i = ipx_interfaces; i;) { tmp = i->if_next; if (i->if_dev == dev) { if (event == NETDEV_UP) ipxitf_hold(i); else __ipxitf_put(i); } i = tmp; } spin_unlock_bh(&ipx_interfaces_lock); out: return NOTIFY_DONE; } 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(ipx_interface *intrfc, struct sk_buff *skb, int copy) { struct ipxhdr *ipx = skb->nh.ipxh; int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node, IPX_NODE_LEN); struct sock *s; int ret; spin_lock_bh(&intrfc->if_sklist_lock); s = intrfc->if_sklist; while (s) { if (s->protinfo.af_ipx.port == ipx->ipx_dest.sock && (is_broadcast || !memcmp(ipx->ipx_dest.node, s->protinfo.af_ipx.node, IPX_NODE_LEN))) { /* We found a socket to which to send */ struct sk_buff *skb1; if (copy) { skb1 = skb_clone(skb, GFP_ATOMIC); ret = -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; } s = s->next; } /* skb was solely for us, and we did not make a copy, so free it. */ if (!copy) kfree_skb(skb); ret = 0; out: spin_unlock_bh(&intrfc->if_sklist_lock); return ret; } #else static struct sock *ncp_connection_hack(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); for (sk = intrfc->if_sklist; sk && sk->protinfo.af_ipx.ipx_ncp_conn != connection; sk = sk->next); if (sk) sock_hold(sk); spin_unlock_bh(&intrfc->if_sklist_lock); } return sk; } static int ipxitf_demux_socket(ipx_interface *intrfc, struct sk_buff *skb, int copy) { struct ipxhdr *ipx = skb->nh.ipxh; struct sock *sock1 = NULL, *sock2 = NULL; struct sk_buff *skb1 = NULL, *skb2 = NULL; int ret; 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. */ if (!sock1 && !sock2) { if (!copy) kfree_skb(skb); return 0; } /* * 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; ret = -ENOMEM; if (!skb1) goto out; /* 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); ret = -ENOMEM; if (!skb2) goto out; if (sock2) ipxitf_def_skb_handler(sock2, skb2); ret = 0; out: if (sock1) sock_put(sock1); if (sock2) sock_put(sock2); return ret; } #endif /* CONFIG_IPX_INTERN */ static struct sk_buff *ipxitf_adjust_skbuff(ipx_interface *intrfc, struct sk_buff *skb) { struct sk_buff *skb2; int in_offset = skb->h.raw - 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); skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len); memcpy(skb2->h.raw, skb->h.raw, 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 */ static int ipxitf_send(ipx_interface *intrfc, struct sk_buff *skb, char *node) { struct ipxhdr *ipx = skb->nh.ipxh; 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) { u32 *last_hop = (u32 *)(((u8 *) skb->data) + sizeof(struct ipxhdr) + IPX_SKB_CB(skb)->last_hop.index * sizeof(u32)); *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 its 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 = __constant_htons(ETH_P_IPX); dl->datalink_header(dl, skb, dest_node); /* Send it out */ dev_queue_xmit(skb); out: return 0; } static int ipxrtr_add_route(__u32, ipx_interface *, unsigned char *); static int ipxitf_add_local_route(ipx_interface *intrfc) { return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL); } static const char * ipx_frame_name(unsigned short); static const char * ipx_device_name(ipx_interface *); static void ipxitf_discover_netnum(ipx_interface *intrfc, struct sk_buff *skb); static int ipxitf_pprop(ipx_interface *intrfc, struct sk_buff *skb); static int ipxitf_rcv(ipx_interface *intrfc, struct sk_buff *skb) { struct ipxhdr *ipx = skb->nh.ipxh; int ret = 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) { ret = ipxitf_pprop(intrfc, skb); if (ret) 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) ret = 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)) { ret = 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 ret; } static void ipxitf_discover_netnum(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) { 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) htonl(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(ipx_interface *intrfc, struct sk_buff *skb) { struct ipxhdr *ipx = skb->nh.ipxh; int i, ret = -EINVAL; ipx_interface *ifcs; char *c; u32 *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? */ ret = 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 = (u32 *) 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); for (ifcs = ipx_interfaces; ifcs; ifcs = ifcs->if_next) { /* Except unconfigured interfaces */ if (!ifcs->if_netnum) continue; /* That aren't in the list */ if (ifcs == intrfc) continue; l = (__u32 *) 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 ret; } static void ipxitf_insert(ipx_interface *intrfc) { intrfc->if_next = NULL; spin_lock_bh(&ipx_interfaces_lock); if (!ipx_interfaces) ipx_interfaces = intrfc; else { ipx_interface *i = ipx_interfaces; while (i->if_next) i = i->if_next; i->if_next = intrfc; } spin_unlock_bh(&ipx_interfaces_lock); if (ipxcfg_auto_select_primary && !ipx_primary_net) ipx_primary_net = intrfc; } static ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum, unsigned short dlink_type, struct datalink_proto *dlink, unsigned char internal, int ipx_offset) { 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; intrfc->if_sklist = NULL; atomic_set(&intrfc->refcnt, 1); spin_lock_init(&intrfc->if_sklist_lock); MOD_INC_USE_COUNT; } return intrfc; } static int ipxitf_create_internal(ipx_interface_definition *idef) { ipx_interface *intrfc; int ret = -EEXIST; /* Only one primary network allowed */ if (ipx_primary_net) goto out; /* Must have a valid network number */ ret = -EADDRNOTAVAIL; if (!idef->ipx_network) goto out; intrfc = ipxitf_find_using_net(idef->ipx_network); ret = -EADDRINUSE; if (intrfc) { ipxitf_put(intrfc); goto out; } intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0); ret = -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); ret = ipxitf_add_local_route(intrfc); ipxitf_put(intrfc); out: return ret; } static int ipx_map_frame_type(unsigned char type) { int ret = 0; switch (type) { case IPX_FRAME_ETHERII: ret = __constant_htons(ETH_P_IPX); break; case IPX_FRAME_8022: ret = __constant_htons(ETH_P_802_2); break; case IPX_FRAME_SNAP: ret = __constant_htons(ETH_P_SNAP); break; case IPX_FRAME_8023: ret = __constant_htons(ETH_P_802_3); break; } return ret; } static int ipxitf_create(ipx_interface_definition *idef) { struct net_device *dev; unsigned short dlink_type = 0; struct datalink_proto *datalink = NULL; ipx_interface *intrfc; int err; if (idef->ipx_special == IPX_INTERNAL) { err = ipxitf_create_internal(idef); goto out; } err = -EEXIST; if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net) goto out; intrfc = ipxitf_find_using_net(idef->ipx_network); err = -EADDRINUSE; if (idef->ipx_network && intrfc) { ipxitf_put(intrfc); goto out; } if (intrfc) ipxitf_put(intrfc); dev = dev_get_by_name(idef->ipx_device); err = -ENODEV; if (!dev) goto out; switch (idef->ipx_dlink_type) { case IPX_FRAME_TR_8022: printk(KERN_WARNING "IPX frame type 802.2TR is " "obsolete Use 802.2 instead.\n"); /* fall through */ case IPX_FRAME_8022: dlink_type = __constant_htons(ETH_P_802_2); datalink = p8022_datalink; break; case IPX_FRAME_ETHERII: if (dev->type != ARPHRD_IEEE802) { dlink_type = __constant_htons(ETH_P_IPX); datalink = pEII_datalink; break; } else printk(KERN_WARNING "IPX frame type EtherII " "over token-ring is obsolete. Use SNAP " "instead.\n"); /* fall through */ case IPX_FRAME_SNAP: dlink_type = __constant_htons(ETH_P_SNAP); datalink = pSNAP_datalink; break; case IPX_FRAME_8023: dlink_type = __constant_htons(ETH_P_802_3); datalink = p8023_datalink; break; case IPX_FRAME_NONE: default: err = -EPROTONOSUPPORT; goto out_dev; } err = -ENETDOWN; if (!(dev->flags & IFF_UP)) goto out_dev; /* Check addresses are suitable */ err = -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); err = -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 */ err = 0; if (!intrfc->if_netnum) goto out_intrfc; err = ipxitf_add_local_route(intrfc); out_intrfc: ipxitf_put(intrfc); goto out; out_dev: dev_put(dev); out: return err; } static int ipxitf_delete(ipx_interface_definition *idef) { struct net_device *dev = NULL; unsigned short dlink_type = 0; ipx_interface *intrfc; int ret = 0; spin_lock_bh(&ipx_interfaces_lock); if (idef->ipx_special == IPX_INTERNAL) { if (ipx_internal_net) { __ipxitf_put(ipx_internal_net); goto out; } ret = -ENOENT; goto out; } dlink_type = ipx_map_frame_type(idef->ipx_dlink_type); ret = -EPROTONOSUPPORT; if (!dlink_type) goto out; dev = __dev_get_by_name(idef->ipx_device); ret = -ENODEV; if (!dev) goto out; intrfc = __ipxitf_find_using_phys(dev, dlink_type); ret = -EINVAL; if (!intrfc) goto out; __ipxitf_put(intrfc); ret = 0; out: spin_unlock_bh(&ipx_interfaces_lock); return ret; } static ipx_interface *ipxitf_auto_create(struct net_device *dev, unsigned short dlink_type) { 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 (htons(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 *arg) { struct ifreq ifr; int val; switch (cmd) { case SIOCSIFADDR: { struct sockaddr_ipx *sipx; ipx_interface_definition f; if (copy_from_user(&ifr, arg, sizeof(ifr))) return -EFAULT; sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; if (sipx->sipx_family != AF_IPX) return -EINVAL; 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) return ipxitf_delete(&f); else return ipxitf_create(&f); } case SIOCGIFADDR: { int err = 0; struct sockaddr_ipx *sipx; ipx_interface *ipxif; struct net_device *dev; if (copy_from_user(&ifr, arg, sizeof(ifr))) return -EFAULT; sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; dev = __dev_get_by_name(ifr.ifr_name); if (!dev) return -ENODEV; ipxif = ipxitf_find_using_phys(dev, ipx_map_frame_type(sipx->sipx_type)); if (!ipxif) return -EADDRNOTAVAIL; sipx->sipx_family = AF_IPX; sipx->sipx_network = ipxif->if_netnum; memcpy(sipx->sipx_node, ipxif->if_node, sizeof(sipx->sipx_node)); if (copy_to_user(arg, &ifr, sizeof(ifr))) err = -EFAULT; ipxitf_put(ipxif); return err; } case SIOCAIPXITFCRT: if (get_user(val, (unsigned char *) arg)) return -EFAULT; ipxcfg_set_auto_create(val); break; case SIOCAIPXPRISLT: if (get_user(val, (unsigned char *) arg)) return -EFAULT; ipxcfg_set_auto_select(val); break; default: return -EINVAL; } return 0; } /* Routing tables for the IPX socket layer. */ static inline void ipxrtr_hold(ipx_route *rt) { atomic_inc(&rt->refcnt); } static inline void ipxrtr_put(ipx_route *rt) { if (atomic_dec_and_test(&rt->refcnt)) kfree(rt); } static ipx_route *ipxrtr_lookup(__u32 net) { ipx_route *r; read_lock_bh(&ipx_routes_lock); for (r = ipx_routes; r && r->ir_net != net; r = r->ir_next) ; if (r) ipxrtr_hold(r); read_unlock_bh(&ipx_routes_lock); return r; } /* caller must hold a reference to intrfc */ static int ipxrtr_add_route(__u32 network, ipx_interface *intrfc, unsigned char *node) { ipx_route *rt; int ret; /* Get a route structure; either existing or create */ rt = ipxrtr_lookup(network); if (!rt) { rt = kmalloc(sizeof(ipx_route), GFP_ATOMIC); ret = -EAGAIN; if (!rt) goto out; atomic_set(&rt->refcnt, 1); ipxrtr_hold(rt); write_lock_bh(&ipx_routes_lock); rt->ir_next = ipx_routes; ipx_routes = rt; write_unlock_bh(&ipx_routes_lock); } else { ret = -EEXIST; if (intrfc == ipx_internal_net) goto out_put; } rt->ir_net = network; rt->ir_intrfc = intrfc; if (!node) { memset(rt->ir_router_node, '\0', IPX_NODE_LEN); rt->ir_routed = 0; } else { memcpy(rt->ir_router_node, node, IPX_NODE_LEN); rt->ir_routed = 1; } ret = 0; out_put: ipxrtr_put(rt); out: return ret; } static void ipxrtr_del_routes(ipx_interface *intrfc) { ipx_route **r, *tmp; write_lock_bh(&ipx_routes_lock); for (r = &ipx_routes; (tmp = *r) != NULL;) { if (tmp->ir_intrfc == intrfc) { *r = tmp->ir_next; ipxrtr_put(tmp); } else r = &(tmp->ir_next); } write_unlock_bh(&ipx_routes_lock); } static int ipxrtr_create(ipx_route_definition *rd) { ipx_interface *intrfc; int ret = -ENETUNREACH; /* Find the appropriate interface */ intrfc = ipxitf_find_using_net(rd->ipx_router_network); if (!intrfc) goto out; ret = ipxrtr_add_route(rd->ipx_network, intrfc, rd->ipx_router_node); ipxitf_put(intrfc); out: return ret; } static int ipxrtr_delete(long net) { ipx_route **r; ipx_route *tmp; int err; write_lock_bh(&ipx_routes_lock); for (r = &ipx_routes; (tmp = *r) != NULL;) { if (tmp->ir_net == net) { /* Directly connected; can't lose route */ err = -EPERM; if (!tmp->ir_routed) goto out; *r = tmp->ir_next; ipxrtr_put(tmp); err = 0; goto out; } r = &(tmp->ir_next); } err = -ENOENT; out: write_unlock_bh(&ipx_routes_lock); return err; } /* * Checksum routine for IPX */ /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */ /* This functions should *not* mess with packet contents */ static __u16 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.) */ /* start at ipx_dest - We skip the checksum field and start with * ipx_type before the loop, not considering ipx_tctrl in the calc */ __u16 *p = (__u16 *)&packet->ipx_dest; __u32 i = (length >> 1) - 1; /* Number of complete words */ __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl); /* Loop through all complete words except the checksum field, * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */ while (--i) sum += *p++; /* Add on the last part word if it exists */ if (packet->ipx_pktsize & __constant_htons(1)) sum += ntohs(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++; return ~sum; } /* * Route an outgoing frame from a socket. */ static int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, struct iovec *iov, int len, int noblock) { struct sk_buff *skb; ipx_interface *intrfc; struct ipxhdr *ipx; int size; int ipx_offset; ipx_route *rt = NULL; int err; /* Find the appropriate interface on which to send packet */ if (!usipx->sipx_network && ipx_primary_net) { usipx->sipx_network = ipx_primary_net->if_netnum; intrfc = ipx_primary_net; } else { rt = ipxrtr_lookup(usipx->sipx_network); err = -ENETUNREACH; if (!rt) goto out; intrfc = rt->ir_intrfc; } ipxitf_hold(intrfc); ipx_offset = intrfc->if_ipx_offset; size = sizeof(struct ipxhdr) + len + ipx_offset; skb = sock_alloc_send_skb(sk, size, noblock, &err); if (!skb) goto out_put; skb_reserve(skb, ipx_offset); skb->sk = sk; /* Fill in IPX header */ ipx = (struct ipxhdr *)skb_put(skb, sizeof(struct ipxhdr)); ipx->ipx_pktsize = htons(len + sizeof(struct ipxhdr)); IPX_SKB_CB(skb)->ipx_tctrl = 0; ipx->ipx_type = usipx->sipx_type; skb->h.raw = (void *)skb->nh.ipxh = ipx; IPX_SKB_CB(skb)->last_hop.index = -1; #ifdef CONFIG_IPX_INTERN IPX_SKB_CB(skb)->ipx_source_net = sk->protinfo.af_ipx.intrfc->if_netnum; memcpy(ipx->ipx_source.node, sk->protinfo.af_ipx.node, IPX_NODE_LEN); #else err = ntohs(sk->protinfo.af_ipx.port); if (err == 0x453 || err == 0x452) { /* RIP/SAP special handling for mars_nwe */ IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum; memcpy(ipx->ipx_source.node, intrfc->if_node, IPX_NODE_LEN); } else { IPX_SKB_CB(skb)->ipx_source_net = sk->protinfo.af_ipx.intrfc->if_netnum; memcpy(ipx->ipx_source.node, sk->protinfo.af_ipx.intrfc->if_node, IPX_NODE_LEN); } #endif /* CONFIG_IPX_INTERN */ ipx->ipx_source.sock = sk->protinfo.af_ipx.port; IPX_SKB_CB(skb)->ipx_dest_net = usipx->sipx_network; memcpy(ipx->ipx_dest.node, usipx->sipx_node, IPX_NODE_LEN); ipx->ipx_dest.sock = usipx->sipx_port; err = memcpy_fromiovec(skb_put(skb, len), iov, len); if (err) { kfree_skb(skb); goto out_put; } /* Apply checksum. Not allowed on 802.3 links. */ if (sk->no_check || intrfc->if_dlink_type == IPX_FRAME_8023) ipx->ipx_checksum = 0xFFFF; else ipx->ipx_checksum = ipx_cksum(ipx, len + sizeof(struct ipxhdr)); err = ipxitf_send(intrfc, skb, (rt && rt->ir_routed) ? rt->ir_router_node : ipx->ipx_dest.node); out_put: ipxitf_put(intrfc); if (rt) ipxrtr_put(rt); out: return err; } /* the skb has to be unshared, we'll end up calling ipxitf_send, that'll * modify the packet */ int ipxrtr_route_skb(struct sk_buff *skb) { struct ipxhdr *ipx = skb->nh.ipxh; ipx_route *r = ipxrtr_lookup(IPX_SKB_CB(skb)->ipx_dest_net); if (!r) { /* no known route */ kfree_skb(skb); return 0; } ipxitf_hold(r->ir_intrfc); ipxitf_send(r->ir_intrfc, skb, r->ir_routed ? r->ir_router_node : ipx->ipx_dest.node); ipxitf_put(r->ir_intrfc); ipxrtr_put(r); return 0; } /* * We use a normal struct rtentry for route handling */ static int ipxrtr_ioctl(unsigned int cmd, void *arg) { struct rtentry rt; /* Use these to behave like 'other' stacks */ struct sockaddr_ipx *sg, *st; int ret = -EFAULT; if (copy_from_user(&rt, arg, sizeof(rt))) goto out; sg = (struct sockaddr_ipx *)&rt.rt_gateway; st = (struct sockaddr_ipx *)&rt.rt_dst; ret = -EINVAL; if (!(rt.rt_flags & RTF_GATEWAY) || /* Direct routes are fixed */ sg->sipx_family != AF_IPX || st->sipx_family != AF_IPX) goto out; switch (cmd) { case SIOCDELRT: ret = ipxrtr_delete(st->sipx_network); break; case SIOCADDRT: { struct ipx_route_definition f; f.ipx_network = st->sipx_network; f.ipx_router_network = sg->sipx_network; memcpy(f.ipx_router_node, sg->sipx_node, IPX_NODE_LEN); ret = ipxrtr_create(&f); break; } } out: return ret; } static const char *ipx_frame_name(unsigned short frame) { char* ret = "None"; switch (ntohs(frame)) { case ETH_P_IPX: ret = "EtherII"; break; case ETH_P_802_2: ret = "802.2"; break; case ETH_P_SNAP: ret = "SNAP"; break; case ETH_P_802_3: ret = "802.3"; break; case ETH_P_TR_802_2: ret = "802.2TR"; break; } return ret; } static const char *ipx_device_name(ipx_interface *intrfc) { return intrfc->if_internal ? "Internal" : intrfc->if_dev ? intrfc->if_dev->name : "Unknown"; } /* Called from proc fs */ static int ipx_interface_get_info(char *buffer, char **start, off_t offset, int length) { ipx_interface *i; off_t begin = 0, pos = 0; int len = 0; /* Theory.. Keep printing in the same place until we pass offset */ len += sprintf(buffer, "%-11s%-15s%-9s%-11s%s", "Network", "Node_Address", "Primary", "Device", "Frame_Type"); #ifdef IPX_REFCNT_DEBUG len += sprintf(buffer + len, " refcnt"); #endif strcat(buffer + len++, "\n"); spin_lock_bh(&ipx_interfaces_lock); for (i = ipx_interfaces; i; i = i->if_next) { len += sprintf(buffer + len, "%08lX ", (long unsigned int) ntohl(i->if_netnum)); len += sprintf(buffer + len, "%02X%02X%02X%02X%02X%02X ", i->if_node[0], i->if_node[1], i->if_node[2], i->if_node[3], i->if_node[4], i->if_node[5]); len += sprintf(buffer + len, "%-9s", i == ipx_primary_net ? "Yes" : "No"); len += sprintf(buffer + len, "%-11s", ipx_device_name(i)); len += sprintf(buffer + len, "%-9s", ipx_frame_name(i->if_dlink_type)); #ifdef IPX_REFCNT_DEBUG len += sprintf(buffer + len, "%6d", atomic_read(&i->refcnt)); #endif strcat(buffer + len++, "\n"); /* Are we still dumping unwanted data then discard the record */ pos = begin + len; if (pos < offset) { len = 0; /* Keep dumping into the buffer start */ begin = pos; } if (pos > offset + length) /* We have dumped enough */ break; } spin_unlock_bh(&ipx_interfaces_lock); /* The data in question runs from begin to begin+len */ *start = buffer + (offset - begin); /* Start of wanted data */ len -= (offset - begin); /* Remove unwanted header data from length */ if (len > length) len = length; /* Remove unwanted tail data from length */ return len; } static int ipx_get_info(char *buffer, char **start, off_t offset, int length) { struct sock *s; ipx_interface *i; off_t begin = 0, pos = 0; int len = 0; /* Theory.. Keep printing in the same place until we pass offset */ #ifdef CONFIG_IPX_INTERN len += sprintf(buffer, "%-28s%-28s%-10s%-10s%-7s%s\n", "Local_Address", #else len += sprintf(buffer, "%-15s%-28s%-10s%-10s%-7s%s\n", "Local_Address", #endif /* CONFIG_IPX_INTERN */ "Remote_Address", "Tx_Queue", "Rx_Queue", "State", "Uid"); spin_lock_bh(&ipx_interfaces_lock); for (i = ipx_interfaces; i; i = i->if_next) { ipxitf_hold(i); spin_lock_bh(&i->if_sklist_lock); for (s = i->if_sklist; s; s = s->next) { #ifdef CONFIG_IPX_INTERN len += sprintf(buffer + len, "%08lX:%02X%02X%02X%02X%02X%02X:%04X ", (unsigned long) htonl(s->protinfo.af_ipx.intrfc->if_netnum), s->protinfo.af_ipx.node[0], s->protinfo.af_ipx.node[1], s->protinfo.af_ipx.node[2], s->protinfo.af_ipx.node[3], s->protinfo.af_ipx.node[4], s->protinfo.af_ipx.node[5], htons(s->protinfo.af_ipx.port)); #else len += sprintf(buffer + len, "%08lX:%04X ", (unsigned long) htonl(i->if_netnum), htons(s->protinfo.af_ipx.port)); #endif /* CONFIG_IPX_INTERN */ if (s->state != TCP_ESTABLISHED) len += sprintf(buffer + len, "%-28s", "Not_Connected"); else { len += sprintf(buffer + len, "%08lX:%02X%02X%02X%02X%02X%02X:%04X ", (unsigned long) htonl(s->protinfo.af_ipx.dest_addr.net), s->protinfo.af_ipx.dest_addr.node[0], s->protinfo.af_ipx.dest_addr.node[1], s->protinfo.af_ipx.dest_addr.node[2], s->protinfo.af_ipx.dest_addr.node[3], s->protinfo.af_ipx.dest_addr.node[4], s->protinfo.af_ipx.dest_addr.node[5], htons(s->protinfo.af_ipx.dest_addr.sock)); } len += sprintf(buffer + len, "%08X %08X ", atomic_read(&s->wmem_alloc), atomic_read(&s->rmem_alloc)); len += sprintf(buffer + len, "%02X %03d\n", s->state, SOCK_INODE(s->socket)->i_uid); pos = begin + len; if (pos < offset) { len = 0; begin = pos; } if (pos > offset + length) /* We have dumped enough */ break; } spin_unlock_bh(&i->if_sklist_lock); ipxitf_put(i); } spin_unlock_bh(&ipx_interfaces_lock); /* The data in question runs from begin to begin+len */ *start = buffer + offset - begin; len -= (offset - begin); if (len > length) len = length; return len; } static int ipx_rt_get_info(char *buffer, char **start, off_t offset, int length) { ipx_route *rt; off_t begin = 0, pos = 0; int len = 0; len += sprintf(buffer, "%-11s%-13s%s\n", "Network", "Router_Net", "Router_Node"); read_lock_bh(&ipx_routes_lock); for (rt = ipx_routes; rt; rt = rt->ir_next) { len += sprintf(buffer + len, "%08lX ", (long unsigned int) ntohl(rt->ir_net)); if (rt->ir_routed) { len += sprintf(buffer + len, "%08lX %02X%02X%02X%02X%02X%02X\n", (long unsigned int) ntohl(rt->ir_intrfc->if_netnum), rt->ir_router_node[0], rt->ir_router_node[1], rt->ir_router_node[2], rt->ir_router_node[3], rt->ir_router_node[4], rt->ir_router_node[5]); } else { len += sprintf(buffer + len, "%-13s%s\n", "Directly", "Connected"); } pos = begin + len; if (pos < offset) { len = 0; begin = pos; } if (pos > offset + length) break; } read_unlock_bh(&ipx_routes_lock); *start = buffer + (offset - begin); len -= (offset - begin); if (len > length) len = length; return len; } /* 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 *optval, int optlen) { struct sock *sk = sock->sk; int opt; int ret = -EINVAL; if (optlen != sizeof(int)) goto out; ret = -EFAULT; if (get_user(opt, (unsigned int *)optval)) goto out; ret = -ENOPROTOOPT; if (!(level == SOL_IPX && optname == IPX_TYPE)) goto out; sk->protinfo.af_ipx.type = opt; ret = 0; out: return ret; } static int ipx_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { struct sock *sk = sock->sk; int val = 0; int len; int ret = -ENOPROTOOPT; if (!(level == SOL_IPX && optname == IPX_TYPE)) goto out; val = sk->protinfo.af_ipx.type; ret = -EFAULT; if (get_user(len, optlen)) goto out; len = min_t(unsigned int, len, sizeof(int)); ret = -EINVAL; if(len < 0) goto out; ret = -EFAULT; if (put_user(len, optlen) || copy_to_user(optval, &val, len)) goto out; ret = 0; out: return ret; } static int ipx_create(struct socket *sock, int protocol) { int ret = -ESOCKTNOSUPPORT; struct sock *sk; switch (sock->type) { case SOCK_DGRAM: sk = sk_alloc(PF_IPX, GFP_KERNEL, 1); ret = -ENOMEM; if (!sk) goto out; sock->ops = &ipx_dgram_ops; break; case SOCK_SEQPACKET: /* * From this point on SPX sockets are handled * by af_spx.c and the methods replaced. */ if (spx_family_ops) { ret = spx_family_ops->create(sock, protocol); goto out; } /* Fall through if SPX is not loaded */ case SOCK_STREAM: /* Allow higher levels to piggyback */ default: goto out; } #ifdef IPX_REFCNT_DEBUG atomic_inc(&ipx_sock_nr); printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk, atomic_read(&ipx_sock_nr)); #endif sock_init_data(sock, sk); sk->destruct = NULL; sk->no_check = 1; /* Checksum off by default */ MOD_INC_USE_COUNT; ret = 0; out: return ret; } static int ipx_release(struct socket *sock) { struct sock *sk = sock->sk; if (!sk) goto out; if (!sk->dead) sk->state_change(sk); sk->dead = 1; sock->sk = NULL; ipx_destroy_socket(sk); if (sock->type == SOCK_DGRAM) MOD_DEC_USE_COUNT; out: return 0; } /* caller must hold a reference to intrfc */ static unsigned short ipx_first_free_socketnum(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, ntohs(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 ntohs(socketNum); } static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sock *sk = sock->sk; ipx_interface *intrfc; struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr; int ret = -EINVAL; if (!sk->zapped || addr_len != sizeof(struct sockaddr_ipx)) goto out; intrfc = ipxitf_find_using_net(addr->sipx_network); ret = -EADDRNOTAVAIL; if (!intrfc) goto out; if (!addr->sipx_port) { addr->sipx_port = ipx_first_free_socketnum(intrfc); ret = -EINVAL; if (!addr->sipx_port) goto out_put; } /* protect IPX system stuff like routing/sap */ ret = -EACCES; if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET && !capable(CAP_NET_ADMIN)) goto out_put; sk->protinfo.af_ipx.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. */ ret = -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(sk->protinfo.af_ipx.node, intrfc->if_node, IPX_NODE_LEN); else memcpy(sk->protinfo.af_ipx.node, addr->sipx_node, IPX_NODE_LEN); ret = -EADDRINUSE; if (ipxitf_find_internal_socket(intrfc, sk->protinfo.af_ipx.node, sk->protinfo.af_ipx.port)) { SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n", ntohs((int)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(sk->protinfo.af_ipx.node, intrfc->if_node, IPX_NODE_LEN); ret = -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; } } #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() */ ret = -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); sk->zapped = 0; SOCK_DEBUG(sk, "IPX: bound socket 0x%04X.\n", ntohs(addr->sipx_port) ); ret = 0; out_put: ipxitf_put(intrfc); out: return ret; } static int ipx_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; struct sockaddr_ipx *addr; int ret = -EINVAL; ipx_route *rt; sk->state = TCP_CLOSE; sock->state = SS_UNCONNECTED; if (addr_len != sizeof(*addr)) goto out; addr = (struct sockaddr_ipx *)uaddr; /* put the autobinding in */ if (!sk->protinfo.af_ipx.port) { struct sockaddr_ipx uaddr; uaddr.sipx_port = 0; uaddr.sipx_network = 0; #ifdef CONFIG_IPX_INTERN ret = -ENETDOWN; if (!sk->protinfo.af_ipx.intrfc) goto out; /* Someone zonked the iface */ memcpy(uaddr.sipx_node, sk->protinfo.af_ipx.intrfc->if_node, IPX_NODE_LEN); #endif /* CONFIG_IPX_INTERN */ ret = ipx_bind(sock, (struct sockaddr *)&uaddr, sizeof(struct sockaddr_ipx)); if (ret) goto out; } /* We can either connect to primary network or somewhere * we can route to */ rt = ipxrtr_lookup(addr->sipx_network); ret = -ENETUNREACH; if (!rt && !(!addr->sipx_network && ipx_primary_net)) goto out; sk->protinfo.af_ipx.dest_addr.net = addr->sipx_network; sk->protinfo.af_ipx.dest_addr.sock = addr->sipx_port; memcpy(sk->protinfo.af_ipx.dest_addr.node, addr->sipx_node, IPX_NODE_LEN); sk->protinfo.af_ipx.type = addr->sipx_type; if (sock->type == SOCK_DGRAM) { sock->state = SS_CONNECTED; sk->state = TCP_ESTABLISHED; } if (rt) ipxrtr_put(rt); ret = 0; out: return ret; } static int ipx_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { ipx_address *addr; struct sockaddr_ipx sipx; struct sock *sk = sock->sk; int ret; *uaddr_len = sizeof(struct sockaddr_ipx); if (peer) { ret = -ENOTCONN; if (sk->state != TCP_ESTABLISHED) goto out; addr = &sk->protinfo.af_ipx.dest_addr; sipx.sipx_network = addr->net; sipx.sipx_port = addr->sock; memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN); } else { if (sk->protinfo.af_ipx.intrfc) { sipx.sipx_network = sk->protinfo.af_ipx.intrfc->if_netnum; #ifdef CONFIG_IPX_INTERN memcpy(sipx.sipx_node, sk->protinfo.af_ipx.node, IPX_NODE_LEN); #else memcpy(sipx.sipx_node, sk->protinfo.af_ipx.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 = sk->protinfo.af_ipx.port; } sipx.sipx_family = AF_IPX; sipx.sipx_type = sk->protinfo.af_ipx.type; memcpy(uaddr, &sipx, sizeof(sipx)); ret = 0; out: return ret; } int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { /* NULL here for pt means the packet was looped back */ ipx_interface *intrfc; struct ipxhdr *ipx; u16 ipx_pktsize; int ret = 0; /* Not ours */ if (skb->pkt_type == PACKET_OTHERHOST) goto drop; if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) goto out; ipx = skb->nh.ipxh; ipx_pktsize = ntohs(ipx->ipx_pktsize); /* Too small or invalid header? */ if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len) goto drop; 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 && ntohl(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; } ret = ipxitf_rcv(intrfc, skb); ipxitf_put(intrfc); goto out; drop: kfree_skb(skb); out: return ret; } static int ipx_sendmsg(struct socket *sock, struct msghdr *msg, int len, struct scm_cookie *scm) { struct sock *sk = sock->sk; struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name; struct sockaddr_ipx local_sipx; int ret = -EINVAL; int flags = msg->msg_flags; /* Socket gets bound below anyway */ /* if (sk->zapped) return -EIO; */ /* Socket not bound */ if (flags & ~MSG_DONTWAIT) goto out; if (usipx) { if (!sk->protinfo.af_ipx.port) { struct sockaddr_ipx uaddr; uaddr.sipx_port = 0; uaddr.sipx_network = 0; #ifdef CONFIG_IPX_INTERN ret = -ENETDOWN; if (!sk->protinfo.af_ipx.intrfc) goto out; /* Someone zonked the iface */ memcpy(uaddr.sipx_node, sk->protinfo.af_ipx.intrfc->if_node, IPX_NODE_LEN); #endif ret = ipx_bind(sock, (struct sockaddr *)&uaddr, sizeof(struct sockaddr_ipx)); if (ret) goto out; } ret = -EINVAL; if (msg->msg_namelen < sizeof(*usipx) || usipx->sipx_family != AF_IPX) goto out; } else { ret = -ENOTCONN; if (sk->state != TCP_ESTABLISHED) goto out; usipx = &local_sipx; usipx->sipx_family = AF_IPX; usipx->sipx_type = sk->protinfo.af_ipx.type; usipx->sipx_port = sk->protinfo.af_ipx.dest_addr.sock; usipx->sipx_network = sk->protinfo.af_ipx.dest_addr.net; memcpy(usipx->sipx_node, sk->protinfo.af_ipx.dest_addr.node, IPX_NODE_LEN); } ret = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len, flags & MSG_DONTWAIT); if (ret >= 0) ret = len; out: return ret; } static int ipx_recvmsg(struct socket *sock, struct msghdr *msg, int size, int flags, struct scm_cookie *scm) { struct sock *sk = sock->sk; struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name; struct ipxhdr *ipx = NULL; struct sk_buff *skb; int copied, err; /* put the autobinding in */ if (!sk->protinfo.af_ipx.port) { struct sockaddr_ipx uaddr; uaddr.sipx_port = 0; uaddr.sipx_network = 0; #ifdef CONFIG_IPX_INTERN err = -ENETDOWN; if (!sk->protinfo.af_ipx.intrfc) goto out; /* Someone zonked the iface */ memcpy(uaddr.sipx_node, sk->protinfo.af_ipx.intrfc->if_node, IPX_NODE_LEN); #endif /* CONFIG_IPX_INTERN */ err = ipx_bind(sock, (struct sockaddr *)&uaddr, sizeof(struct sockaddr_ipx)); if (err) goto out; } err = -ENOTCONN; if (sk->zapped) goto out; skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &err); if (!skb) goto out; ipx = skb->nh.ipxh; copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr); if (copied > size) { copied = size; msg->msg_flags |= MSG_TRUNC; } err = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov, copied); if (err) goto out_free; sk->stamp = skb->stamp; msg->msg_namelen = sizeof(*sipx); 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; } err = copied; out_free: skb_free_datagram(sk, skb); out: return err; } static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { long amount = 0; struct sock *sk = sock->sk; switch (cmd) { case TIOCOUTQ: amount = sk->sndbuf - atomic_read(&sk->wmem_alloc); if (amount < 0) amount = 0; return put_user(amount, (int *)arg); case TIOCINQ: { struct sk_buff *skb = skb_peek(&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); return put_user(amount, (int *)arg); } case SIOCADDRT: case SIOCDELRT: if (!capable(CAP_NET_ADMIN)) return -EPERM; return ipxrtr_ioctl(cmd, (void *)arg); case SIOCSIFADDR: case SIOCAIPXITFCRT: case SIOCAIPXPRISLT: if (!capable(CAP_NET_ADMIN)) return -EPERM; case SIOCGIFADDR: return ipxitf_ioctl(cmd, (void *)arg); case SIOCIPXCFGDATA: return ipxcfg_get_config_data((void *)arg); case SIOCIPXNCPCONN: /* * This socket wants to take care of the NCP connection * handed to us in arg. */ if (!capable(CAP_NET_ADMIN)) return -EPERM; return get_user(sk->protinfo.af_ipx.ipx_ncp_conn, (const unsigned short *)(arg)); case SIOCGSTAMP: { int ret = -EINVAL; if (sk) { if (!sk->stamp.tv_sec) return -ENOENT; ret = -EFAULT; if (!copy_to_user((void *)arg, &sk->stamp, sizeof(struct timeval))) ret = 0; } return ret; } case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: return -EINVAL; default: return dev_ioctl(cmd,(void *) arg); } /*NOT REACHED*/ return 0; } /* * SPX interface support */ int ipx_register_spx(struct proto_ops **p, struct net_proto_family *spx) { if (spx_family_ops) return -EBUSY; cli(); MOD_INC_USE_COUNT; *p = &ipx_dgram_ops; spx_family_ops = spx; sti(); return 0; } int ipx_unregister_spx(void) { spx_family_ops = NULL; MOD_DEC_USE_COUNT; return 0; } /* * Socket family declarations */ static struct net_proto_family ipx_family_ops = { family: PF_IPX, create: ipx_create, }; static struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = { family: PF_IPX, 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, listen: sock_no_listen, shutdown: sock_no_shutdown, /* FIXME: have to support shutdown */ setsockopt: ipx_setsockopt, getsockopt: ipx_getsockopt, sendmsg: ipx_sendmsg, recvmsg: ipx_recvmsg, mmap: sock_no_mmap, sendpage: sock_no_sendpage, }; #include SOCKOPS_WRAP(ipx_dgram, PF_IPX); static struct packet_type ipx_8023_packet_type = { type: __constant_htons(ETH_P_802_3), func: ipx_rcv, data: (void *) 1, /* yap, I understand shared skbs :-) */ }; static struct packet_type ipx_dix_packet_type = { type: __constant_htons(ETH_P_IPX), func: ipx_rcv, data: (void *) 1, /* yap, I understand shared skbs :-) */ }; static struct notifier_block ipx_dev_notifier = { notifier_call: ipxitf_device_event, }; extern struct datalink_proto *make_EII_client(void); extern struct datalink_proto *make_8023_client(void); extern void destroy_EII_client(struct datalink_proto *); extern void destroy_8023_client(struct datalink_proto *); static unsigned char ipx_8022_type = 0xE0; static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 }; static char banner[] __initdata = KERN_INFO "NET4: Linux IPX 0.47 for NET4.0\n" KERN_INFO "IPX Portions Copyright (c) 1995 Caldera, Inc.\n" \ KERN_INFO "IPX Portions Copyright (c) 2000, 2001 Conectiva, Inc.\n"; static int __init ipx_init(void) { sock_register(&ipx_family_ops); pEII_datalink = make_EII_client(); dev_add_pack(&ipx_dix_packet_type); p8023_datalink = make_8023_client(); dev_add_pack(&ipx_8023_packet_type); p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv); if (!p8022_datalink) printk(KERN_CRIT "IPX: Unable to register with 802.2\n"); pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv); if (!pSNAP_datalink) printk(KERN_CRIT "IPX: Unable to register with SNAP\n"); register_netdevice_notifier(&ipx_dev_notifier); ipx_register_sysctl(); #ifdef CONFIG_PROC_FS proc_net_create("ipx", 0, ipx_get_info); proc_net_create("ipx_interface", 0, ipx_interface_get_info); proc_net_create("ipx_route", 0, ipx_rt_get_info); #endif printk(banner); return 0; } module_init(ipx_init); /* Higher layers need this info to prep tx pkts */ int ipx_if_offset(unsigned long ipx_net_number) { ipx_route *rt = ipxrtr_lookup(ipx_net_number); int ret = -ENETUNREACH; if (!rt) goto out; ret = rt->ir_intrfc->if_ipx_offset; ipxrtr_put(rt); out: return ret; } /* Export symbols for higher layers */ EXPORT_SYMBOL(ipxrtr_route_skb); EXPORT_SYMBOL(ipx_if_offset); EXPORT_SYMBOL(ipx_remove_socket); EXPORT_SYMBOL(ipx_register_spx); EXPORT_SYMBOL(ipx_unregister_spx); /* Note on MOD_{INC,DEC}_USE_COUNT: * * Use counts are incremented/decremented when * sockets are created/deleted. * * Routes are always associated with an interface, and * allocs/frees will remain properly accounted for by * their associated interfaces. * * Ergo, before the ipx module can be removed, all IPX * sockets be closed from user space. */ static void __exit ipx_proto_finito(void) { /* no need to worry about having anything on the ipx_interfaces * list, when a interface is created we increment the module * usage count, so the module will only be unloaded when there * are no more interfaces */ proc_net_remove("ipx_route"); proc_net_remove("ipx_interface"); proc_net_remove("ipx"); ipx_unregister_sysctl(); unregister_netdevice_notifier(&ipx_dev_notifier); unregister_snap_client(ipx_snap_id); pSNAP_datalink = NULL; unregister_8022_client(ipx_8022_type); p8022_datalink = NULL; dev_remove_pack(&ipx_8023_packet_type); destroy_8023_client(p8023_datalink); p8023_datalink = NULL; dev_remove_pack(&ipx_dix_packet_type); destroy_EII_client(pEII_datalink); pEII_datalink = NULL; sock_unregister(ipx_family_ops.family); } module_exit(ipx_proto_finito); MODULE_LICENSE("GPL");