/* * 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/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/tcp_states.h> #include <asm/uaccess.h> #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 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; extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, unsigned char *node); extern void ipxrtr_del_routes(struct ipx_interface *intrfc); extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, struct iovec *iov, size_t len, int noblock); extern int ipxrtr_route_skb(struct sk_buff *skb); extern struct ipx_route *ipxrtr_lookup(__be32 net); extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg); 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); 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. */ /* 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; struct hlist_node *node; sk_for_each(s, node, &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; struct hlist_node *node; ipxitf_hold(intrfc); spin_lock_bh(&intrfc->if_sklist_lock); sk_for_each(s, node, &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 *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, node, 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 __inline__ 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 = 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; struct hlist_node *node; int rc; spin_lock_bh(&intrfc->if_sklist_lock); sk_for_each(s, node, &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) { struct hlist_node *node; /* 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, node, &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_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 = 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; } 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 = 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; case ETH_P_TR_802_2: rc = "802.2TR"; 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, int optlen) { struct sock *sk = sock->sk; int opt; int rc = -EINVAL; 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: 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; 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: 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 rc = -ESOCKTNOSUPPORT; struct sock *sk; if (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 = 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; 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); 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_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; 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: 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); 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: 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); struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name; struct sockaddr_ipx local_sipx; int rc = -EINVAL; int flags = msg->msg_flags; /* 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: 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); struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name; struct ipxhdr *ipx = NULL; struct sk_buff *skb; int copied, rc; /* 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) 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; 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; sipx->sipx_zero = 0; } rc = copied; out_free: skb_free_datagram(sk, skb); out: 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; 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 = -EINVAL; if (sk) 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; } 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 /* * Socket family declarations */ static struct net_proto_family ipx_family_ops = { .family = PF_IPX, .create = ipx_create, .owner = THIS_MODULE, }; static const struct proto_ops SOCKOPS_WRAPPED(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 = sock_no_shutdown, /* FIXME: support shutdown */ .setsockopt = ipx_setsockopt, .getsockopt = ipx_getsockopt, .sendmsg = ipx_sendmsg, .recvmsg = ipx_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage, }; SOCKOPS_WRAP(ipx_dgram, PF_IPX); 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, }; extern struct datalink_proto *make_EII_client(void); extern void destroy_EII_client(struct datalink_proto *); 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);