LXR linux/include/net/ipx.h

   1#ifndef _NET_INET_IPX_H_
   2#define _NET_INET_IPX_H_
   3/*
   4 *      The following information is in its entirety obtained from:
   5 *
   6 *      Novell 'IPX Router Specification' Version 1.10 
   7 *              Part No. 107-000029-001
   8 *
   9 *      Which is available from ftp.novell.com
  10 */
  11
  12#include <linux/netdevice.h>
  13#include <net/datalink.h>
  14#include <linux/ipx.h>
  15#include <linux/list.h>
  16#include <linux/slab.h>
  17
  18struct ipx_address {
  19        __be32  net;
  20        __u8    node[IPX_NODE_LEN]; 
  21        __be16  sock;
  22};
  23
  24#define ipx_broadcast_node      "\377\377\377\377\377\377"
  25#define ipx_this_node           "\0\0\0\0\0\0"
  26
  27#define IPX_MAX_PPROP_HOPS 8
  28
  29struct ipxhdr {
  30        __be16                  ipx_checksum __packed;
  31#define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF)
  32        __be16                  ipx_pktsize __packed;
  33        __u8                    ipx_tctrl;
  34        __u8                    ipx_type;
  35#define IPX_TYPE_UNKNOWN        0x00
  36#define IPX_TYPE_RIP            0x01    /* may also be 0 */
  37#define IPX_TYPE_SAP            0x04    /* may also be 0 */
  38#define IPX_TYPE_SPX            0x05    /* SPX protocol */
  39#define IPX_TYPE_NCP            0x11    /* $lots for docs on this (SPIT) */
  40#define IPX_TYPE_PPROP          0x14    /* complicated flood fill brdcast */
  41        struct ipx_address      ipx_dest __packed;
  42        struct ipx_address      ipx_source __packed;
  43};
  44
  45/* From af_ipx.c */
  46extern int sysctl_ipx_pprop_broadcasting;
  47
  48static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
  49{
  50        return (struct ipxhdr *)skb_transport_header(skb);
  51}
  52
  53struct ipx_interface {
  54        /* IPX address */
  55        __be32                  if_netnum;
  56        unsigned char           if_node[IPX_NODE_LEN];
  57        atomic_t                refcnt;
  58
  59        /* physical device info */
  60        struct net_device       *if_dev;
  61        struct datalink_proto   *if_dlink;
  62        __be16                  if_dlink_type;
  63
  64        /* socket support */
  65        unsigned short          if_sknum;
  66        struct hlist_head       if_sklist;
  67        spinlock_t              if_sklist_lock;
  68
  69        /* administrative overhead */
  70        int                     if_ipx_offset;
  71        unsigned char           if_internal;
  72        unsigned char           if_primary;
  73        
  74        struct list_head        node; /* node in ipx_interfaces list */
  75};
  76
  77struct ipx_route {
  78        __be32                  ir_net;
  79        struct ipx_interface    *ir_intrfc;
  80        unsigned char           ir_routed;
  81        unsigned char           ir_router_node[IPX_NODE_LEN];
  82        struct list_head        node; /* node in ipx_routes list */
  83        atomic_t                refcnt;
  84};
  85
  86struct ipx_cb {
  87        u8      ipx_tctrl;
  88        __be32  ipx_dest_net;
  89        __be32  ipx_source_net;
  90        struct {
  91                __be32 netnum;
  92                int index;
  93        } last_hop;
  94};
  95
  96#include <net/sock.h>
  97
  98struct ipx_sock {
  99        /* struct sock has to be the first member of ipx_sock */
 100        struct sock             sk;
 101        struct ipx_address      dest_addr;
 102        struct ipx_interface    *intrfc;
 103        __be16                  port;
 104#ifdef CONFIG_IPX_INTERN
 105        unsigned char           node[IPX_NODE_LEN];
 106#endif
 107        unsigned short          type;
 108        /*
 109         * To handle special ncp connection-handling sockets for mars_nwe,
 110         * the connection number must be stored in the socket.
 111         */
 112        unsigned short          ipx_ncp_conn;
 113};
 114
 115static inline struct ipx_sock *ipx_sk(struct sock *sk)
 116{
 117        return (struct ipx_sock *)sk;
 118}
 119
 120#define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
 121
 122#define IPX_MIN_EPHEMERAL_SOCKET        0x4000
 123#define IPX_MAX_EPHEMERAL_SOCKET        0x7fff
 124
 125extern struct list_head ipx_routes;
 126extern rwlock_t ipx_routes_lock;
 127
 128extern struct list_head ipx_interfaces;
 129struct ipx_interface *ipx_interfaces_head(void);
 130extern spinlock_t ipx_interfaces_lock;
 131
 132extern struct ipx_interface *ipx_primary_net;
 133
 134int ipx_proc_init(void);
 135void ipx_proc_exit(void);
 136
 137const char *ipx_frame_name(__be16);
 138const char *ipx_device_name(struct ipx_interface *intrfc);
 139
 140static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
 141{
 142        atomic_inc(&intrfc->refcnt);
 143}
 144
 145void ipxitf_down(struct ipx_interface *intrfc);
 146struct ipx_interface *ipxitf_find_using_net(__be32 net);
 147int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
 148__be16 ipx_cksum(struct ipxhdr *packet, int length);
 149int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
 150                     unsigned char *node);
 151void ipxrtr_del_routes(struct ipx_interface *intrfc);
 152int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
 153                        struct msghdr *msg, size_t len, int noblock);
 154int ipxrtr_route_skb(struct sk_buff *skb);
 155struct ipx_route *ipxrtr_lookup(__be32 net);
 156int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
 157
 158static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
 159{
 160        if (atomic_dec_and_test(&intrfc->refcnt))
 161                ipxitf_down(intrfc);
 162}
 163
 164static __inline__ void ipxrtr_hold(struct ipx_route *rt)
 165{
 166                atomic_inc(&rt->refcnt);
 167}
 168
 169static __inline__ void ipxrtr_put(struct ipx_route *rt)
 170{
 171                if (atomic_dec_and_test(&rt->refcnt))
 172                                        kfree(rt);
 173}
 174#endif /* _NET_INET_IPX_H_ */
 175