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fff642570d
Noticed by Dave Jones. Signed-off-by: David S. Miller <davem@davemloft.net>
2053 lines
50 KiB
C
2053 lines
50 KiB
C
/*
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* Implements an IPX socket layer.
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*
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* This code is derived from work by
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* Ross Biro : Writing the original IP stack
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* Fred Van Kempen : Tidying up the TCP/IP
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*
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* Many thanks go to Keith Baker, Institute For Industrial Information
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* Technology Ltd, Swansea University for allowing me to work on this
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* in my own time even though it was in some ways related to commercial
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* work I am currently employed to do there.
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*
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* All the material in this file is subject to the Gnu license version 2.
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* Neither Alan Cox nor the Swansea University Computer Society admit
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* liability nor provide warranty for any of this software. This material
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* is provided as is and at no charge.
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*
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* Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br>
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* Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor
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* provide warranty for any of this software. This material is provided
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* "AS-IS" and at no charge.
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*
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* Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
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* Neither Greg Page nor Caldera, Inc. admit liability nor provide
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* warranty for any of this software. This material is provided
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* "AS-IS" and at no charge.
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*
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* See net/ipx/ChangeLog.
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*/
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#include <linux/capability.h>
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#include <linux/errno.h>
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#include <linux/if_arp.h>
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#include <linux/if_ether.h>
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#include <linux/init.h>
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#include <linux/ipx.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/net.h>
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#include <linux/netdevice.h>
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#include <linux/uio.h>
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#include <linux/skbuff.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/termios.h>
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#include <net/ipx.h>
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#include <net/p8022.h>
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#include <net/psnap.h>
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#include <net/sock.h>
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#include <net/tcp_states.h>
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#include <asm/uaccess.h>
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#ifdef CONFIG_SYSCTL
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extern void ipx_register_sysctl(void);
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extern void ipx_unregister_sysctl(void);
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#else
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#define ipx_register_sysctl()
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#define ipx_unregister_sysctl()
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#endif
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/* Configuration Variables */
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static unsigned char ipxcfg_max_hops = 16;
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static char ipxcfg_auto_select_primary;
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static char ipxcfg_auto_create_interfaces;
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int sysctl_ipx_pprop_broadcasting = 1;
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/* Global Variables */
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static struct datalink_proto *p8022_datalink;
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static struct datalink_proto *pEII_datalink;
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static struct datalink_proto *p8023_datalink;
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static struct datalink_proto *pSNAP_datalink;
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static const struct proto_ops ipx_dgram_ops;
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LIST_HEAD(ipx_interfaces);
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DEFINE_SPINLOCK(ipx_interfaces_lock);
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struct ipx_interface *ipx_primary_net;
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struct ipx_interface *ipx_internal_net;
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extern int ipxrtr_add_route(__u32 network, struct ipx_interface *intrfc,
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unsigned char *node);
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extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
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extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
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struct iovec *iov, int len, int noblock);
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extern int ipxrtr_route_skb(struct sk_buff *skb);
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extern struct ipx_route *ipxrtr_lookup(__u32 net);
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extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
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#undef IPX_REFCNT_DEBUG
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#ifdef IPX_REFCNT_DEBUG
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atomic_t ipx_sock_nr;
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#endif
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struct ipx_interface *ipx_interfaces_head(void)
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{
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struct ipx_interface *rc = NULL;
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if (!list_empty(&ipx_interfaces))
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rc = list_entry(ipx_interfaces.next,
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struct ipx_interface, node);
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return rc;
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}
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static void ipxcfg_set_auto_select(char val)
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{
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ipxcfg_auto_select_primary = val;
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if (val && !ipx_primary_net)
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ipx_primary_net = ipx_interfaces_head();
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}
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static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
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{
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struct ipx_config_data vals;
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vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
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vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
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return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
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}
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/*
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* Note: Sockets may not be removed _during_ an interrupt or inet_bh
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* handler using this technique. They can be added although we do not
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* use this facility.
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*/
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static void ipx_remove_socket(struct sock *sk)
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{
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/* Determine interface with which socket is associated */
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struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
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if (!intrfc)
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goto out;
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ipxitf_hold(intrfc);
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spin_lock_bh(&intrfc->if_sklist_lock);
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sk_del_node_init(sk);
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spin_unlock_bh(&intrfc->if_sklist_lock);
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ipxitf_put(intrfc);
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out:
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return;
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}
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static void ipx_destroy_socket(struct sock *sk)
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{
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ipx_remove_socket(sk);
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skb_queue_purge(&sk->sk_receive_queue);
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#ifdef IPX_REFCNT_DEBUG
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atomic_dec(&ipx_sock_nr);
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printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
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atomic_read(&ipx_sock_nr));
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if (atomic_read(&sk->sk_refcnt) != 1)
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printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
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sk, atomic_read(&sk->sk_refcnt));
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#endif
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sock_put(sk);
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}
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/*
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* The following code is used to support IPX Interfaces (IPXITF). An
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* IPX interface is defined by a physical device and a frame type.
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*/
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/* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
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static void ipxitf_clear_primary_net(void)
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{
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ipx_primary_net = NULL;
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if (ipxcfg_auto_select_primary)
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ipx_primary_net = ipx_interfaces_head();
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}
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static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
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unsigned short datalink)
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{
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struct ipx_interface *i;
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list_for_each_entry(i, &ipx_interfaces, node)
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if (i->if_dev == dev && i->if_dlink_type == datalink)
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goto out;
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i = NULL;
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out:
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return i;
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}
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static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
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unsigned short datalink)
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{
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struct ipx_interface *i;
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spin_lock_bh(&ipx_interfaces_lock);
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i = __ipxitf_find_using_phys(dev, datalink);
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if (i)
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ipxitf_hold(i);
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spin_unlock_bh(&ipx_interfaces_lock);
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return i;
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}
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struct ipx_interface *ipxitf_find_using_net(__u32 net)
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{
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struct ipx_interface *i;
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spin_lock_bh(&ipx_interfaces_lock);
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if (net) {
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list_for_each_entry(i, &ipx_interfaces, node)
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if (i->if_netnum == net)
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goto hold;
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i = NULL;
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goto unlock;
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}
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i = ipx_primary_net;
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if (i)
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hold:
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ipxitf_hold(i);
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unlock:
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spin_unlock_bh(&ipx_interfaces_lock);
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return i;
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}
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/* Sockets are bound to a particular IPX interface. */
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static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
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{
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ipxitf_hold(intrfc);
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spin_lock_bh(&intrfc->if_sklist_lock);
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ipx_sk(sk)->intrfc = intrfc;
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sk_add_node(sk, &intrfc->if_sklist);
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spin_unlock_bh(&intrfc->if_sklist_lock);
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ipxitf_put(intrfc);
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}
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/* caller must hold intrfc->if_sklist_lock */
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static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
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unsigned short port)
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{
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struct sock *s;
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struct hlist_node *node;
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sk_for_each(s, node, &intrfc->if_sklist)
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if (ipx_sk(s)->port == port)
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goto found;
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s = NULL;
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found:
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return s;
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}
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/* caller must hold a reference to intrfc */
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static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
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unsigned short port)
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{
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struct sock *s;
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spin_lock_bh(&intrfc->if_sklist_lock);
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s = __ipxitf_find_socket(intrfc, port);
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if (s)
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sock_hold(s);
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spin_unlock_bh(&intrfc->if_sklist_lock);
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return s;
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}
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#ifdef CONFIG_IPX_INTERN
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static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
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unsigned char *ipx_node,
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unsigned short port)
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{
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struct sock *s;
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struct hlist_node *node;
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ipxitf_hold(intrfc);
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spin_lock_bh(&intrfc->if_sklist_lock);
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sk_for_each(s, node, &intrfc->if_sklist) {
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struct ipx_sock *ipxs = ipx_sk(s);
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if (ipxs->port == port &&
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!memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
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goto found;
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}
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s = NULL;
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found:
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spin_unlock_bh(&intrfc->if_sklist_lock);
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ipxitf_put(intrfc);
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return s;
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}
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#endif
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static void __ipxitf_down(struct ipx_interface *intrfc)
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{
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struct sock *s;
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struct hlist_node *node, *t;
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/* Delete all routes associated with this interface */
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ipxrtr_del_routes(intrfc);
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spin_lock_bh(&intrfc->if_sklist_lock);
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/* error sockets */
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sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
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struct ipx_sock *ipxs = ipx_sk(s);
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s->sk_err = ENOLINK;
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s->sk_error_report(s);
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ipxs->intrfc = NULL;
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ipxs->port = 0;
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sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
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sk_del_node_init(s);
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}
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INIT_HLIST_HEAD(&intrfc->if_sklist);
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spin_unlock_bh(&intrfc->if_sklist_lock);
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/* remove this interface from list */
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list_del(&intrfc->node);
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/* remove this interface from *special* networks */
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if (intrfc == ipx_primary_net)
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ipxitf_clear_primary_net();
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if (intrfc == ipx_internal_net)
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ipx_internal_net = NULL;
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if (intrfc->if_dev)
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dev_put(intrfc->if_dev);
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kfree(intrfc);
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}
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void ipxitf_down(struct ipx_interface *intrfc)
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{
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spin_lock_bh(&ipx_interfaces_lock);
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__ipxitf_down(intrfc);
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spin_unlock_bh(&ipx_interfaces_lock);
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}
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static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
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{
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if (atomic_dec_and_test(&intrfc->refcnt))
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__ipxitf_down(intrfc);
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}
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static int ipxitf_device_event(struct notifier_block *notifier,
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unsigned long event, void *ptr)
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{
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struct net_device *dev = ptr;
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struct ipx_interface *i, *tmp;
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if (event != NETDEV_DOWN && event != NETDEV_UP)
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goto out;
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spin_lock_bh(&ipx_interfaces_lock);
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list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
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if (i->if_dev == dev) {
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if (event == NETDEV_UP)
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ipxitf_hold(i);
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else
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__ipxitf_put(i);
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}
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spin_unlock_bh(&ipx_interfaces_lock);
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out:
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return NOTIFY_DONE;
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}
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|
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static __exit void ipxitf_cleanup(void)
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{
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struct ipx_interface *i, *tmp;
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spin_lock_bh(&ipx_interfaces_lock);
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list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
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__ipxitf_put(i);
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spin_unlock_bh(&ipx_interfaces_lock);
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}
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static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
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{
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if (sock_queue_rcv_skb(sock, skb) < 0)
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kfree_skb(skb);
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}
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/*
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* On input skb->sk is NULL. Nobody is charged for the memory.
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*/
|
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|
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/* caller must hold a reference to intrfc */
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|
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#ifdef CONFIG_IPX_INTERN
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static int ipxitf_demux_socket(struct ipx_interface *intrfc,
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struct sk_buff *skb, int copy)
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{
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struct ipxhdr *ipx = ipx_hdr(skb);
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int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
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IPX_NODE_LEN);
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struct sock *s;
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struct hlist_node *node;
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int rc;
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|
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spin_lock_bh(&intrfc->if_sklist_lock);
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sk_for_each(s, node, &intrfc->if_sklist) {
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struct ipx_sock *ipxs = ipx_sk(s);
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|
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if (ipxs->port == ipx->ipx_dest.sock &&
|
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(is_broadcast || !memcmp(ipx->ipx_dest.node,
|
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ipxs->node, IPX_NODE_LEN))) {
|
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/* We found a socket to which to send */
|
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struct sk_buff *skb1;
|
|
|
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if (copy) {
|
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skb1 = skb_clone(skb, GFP_ATOMIC);
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rc = -ENOMEM;
|
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if (!skb1)
|
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goto out;
|
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} else {
|
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skb1 = skb;
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copy = 1; /* skb may only be used once */
|
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}
|
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ipxitf_def_skb_handler(s, skb1);
|
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|
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/* On an external interface, one socket can listen */
|
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if (intrfc != ipx_internal_net)
|
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break;
|
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}
|
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}
|
|
|
|
/* skb was solely for us, and we did not make a copy, so free it. */
|
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if (!copy)
|
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kfree_skb(skb);
|
|
|
|
rc = 0;
|
|
out:
|
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spin_unlock_bh(&intrfc->if_sklist_lock);
|
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return rc;
|
|
}
|
|
#else
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static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
|
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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;
|
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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 */
|
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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);
|
|
skb2->nh.raw = skb2->h.raw = 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) {
|
|
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 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) 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(struct ipx_interface *intrfc, struct sk_buff *skb)
|
|
{
|
|
struct ipxhdr *ipx = ipx_hdr(skb);
|
|
int i, rc = -EINVAL;
|
|
struct 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? */
|
|
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 = (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);
|
|
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 = (__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 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, __u32 netnum,
|
|
unsigned short 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;
|
|
unsigned short 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(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;
|
|
unsigned short 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(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,
|
|
unsigned short 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 (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 __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(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 */
|
|
|
|
__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 & 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;
|
|
}
|
|
|
|
const char *ipx_frame_name(unsigned short 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 socket *sock, int protocol)
|
|
{
|
|
int rc = -ESOCKTNOSUPPORT;
|
|
struct sock *sk;
|
|
|
|
/*
|
|
* 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(PF_IPX, GFP_KERNEL, &ipx_proto, 1);
|
|
if (!sk)
|
|
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->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;
|
|
ipx_destroy_socket(sk);
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
/* caller must hold a reference to intrfc */
|
|
|
|
static unsigned short 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, 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;
|
|
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((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(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((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() */
|
|
|
|
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;
|
|
|
|
/* 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 &&
|
|
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;
|
|
}
|
|
|
|
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.off_sec)
|
|
skb_get_timestamp(skb, &sk->sk_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;
|
|
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 - atomic_read(&sk->sk_wmem_alloc);
|
|
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,
|
|
};
|
|
|
|
#include <linux/smp_lock.h>
|
|
SOCKOPS_WRAP(ipx_dgram, PF_IPX);
|
|
|
|
static struct packet_type ipx_8023_packet_type = {
|
|
.type = __constant_htons(ETH_P_802_3),
|
|
.func = ipx_rcv,
|
|
};
|
|
|
|
static struct packet_type ipx_dix_packet_type = {
|
|
.type = __constant_htons(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 unsigned char ipx_8022_type = 0xE0;
|
|
static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
|
|
static char ipx_EII_err_msg[] __initdata =
|
|
KERN_CRIT "IPX: Unable to register with Ethernet II\n";
|
|
static char ipx_8023_err_msg[] __initdata =
|
|
KERN_CRIT "IPX: Unable to register with 802.3\n";
|
|
static char ipx_llc_err_msg[] __initdata =
|
|
KERN_CRIT "IPX: Unable to register with 802.2\n";
|
|
static char ipx_snap_err_msg[] __initdata =
|
|
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();
|
|
|
|
unregister_snap_client(pSNAP_datalink);
|
|
pSNAP_datalink = NULL;
|
|
|
|
unregister_8022_client(p8022_datalink);
|
|
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;
|
|
|
|
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);
|