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 #include <linux/refcount.h>
  18
  19 struct ipx_address {
  20         __be32  net;
  21         __u8    node[IPX_NODE_LEN];
  22         __be16  sock;
  23 };
  24
  25 #define ipx_broadcast_node      "\377\377\377\377\377\377"
  26 #define ipx_this_node           "\0\0\0\0\0\0"
  27
  28 #define IPX_MAX_PPROP_HOPS 8
  29
  30 struct ipxhdr {
  31         __be16                  ipx_checksum __packed;
  32 #define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF)
  33         __be16                  ipx_pktsize __packed;
  34         __u8                    ipx_tctrl;
  35         __u8                    ipx_type;
  36 #define IPX_TYPE_UNKNOWN        0x00
  37 #define IPX_TYPE_RIP            0x01    /* may also be 0 */
  38 #define IPX_TYPE_SAP            0x04    /* may also be 0 */
  39 #define IPX_TYPE_SPX            0x05    /* SPX protocol */
  40 #define IPX_TYPE_NCP            0x11    /* $lots for docs on this (SPIT) */
  41 #define IPX_TYPE_PPROP          0x14    /* complicated flood fill brdcast */
  42         struct ipx_address      ipx_dest __packed;
  43         struct ipx_address      ipx_source __packed;
  44 };
  45
  46 /* From af_ipx.c */
  47 extern int sysctl_ipx_pprop_broadcasting;
  48
  49 static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
  50 {
  51         return (struct ipxhdr *)skb_transport_header(skb);
  52 }
  53
  54 struct ipx_interface {
  55         /* IPX address */
  56         __be32                  if_netnum;
  57         unsigned char           if_node[IPX_NODE_LEN];
  58         refcount_t              refcnt;
  59
  60         /* physical device info */
  61         struct net_device       *if_dev;
  62         struct datalink_proto   *if_dlink;
  63         __be16                  if_dlink_type;
  64
  65         /* socket support */
  66         unsigned short          if_sknum;
  67         struct hlist_head       if_sklist;
  68         spinlock_t              if_sklist_lock;
  69
  70         /* administrative overhead */
  71         int                     if_ipx_offset;
  72         unsigned char           if_internal;
  73         unsigned char           if_primary;
  74
  75         struct list_head        node; /* node in ipx_interfaces list */
  76 };
  77
  78 struct ipx_route {
  79         __be32                  ir_net;
  80         struct ipx_interface    *ir_intrfc;
  81         unsigned char           ir_routed;
  82         unsigned char           ir_router_node[IPX_NODE_LEN];
  83         struct list_head        node; /* node in ipx_routes list */
  84         refcount_t              refcnt;
  85 };
  86
  87 struct ipx_cb {
  88         u8      ipx_tctrl;
  89         __be32  ipx_dest_net;
  90         __be32  ipx_source_net;
  91         struct {
  92                 __be32 netnum;
  93                 int index;
  94         } last_hop;
  95 };
  96
  97 #include <net/sock.h>
  98
  99 struct ipx_sock {
 100         /* struct sock has to be the first member of ipx_sock */
 101         struct sock             sk;
 102         struct ipx_address      dest_addr;
 103         struct ipx_interface    *intrfc;
 104         __be16                  port;
 105 #ifdef CONFIG_IPX_INTERN
 106         unsigned char           node[IPX_NODE_LEN];
 107 #endif
 108         unsigned short          type;
 109         /*
 110          * To handle special ncp connection-handling sockets for mars_nwe,
 111          * the connection number must be stored in the socket.
 112          */
 113         unsigned short          ipx_ncp_conn;
 114 };
 115
 116 static inline struct ipx_sock *ipx_sk(struct sock *sk)
 117 {
 118         return (struct ipx_sock *)sk;
 119 }
 120
 121 #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
 122
 123 #define IPX_MIN_EPHEMERAL_SOCKET        0x4000
 124 #define IPX_MAX_EPHEMERAL_SOCKET        0x7fff
 125
 126 extern struct list_head ipx_routes;
 127 extern rwlock_t ipx_routes_lock;
 128
 129 extern struct list_head ipx_interfaces;
 130 struct ipx_interface *ipx_interfaces_head(void);
 131 extern spinlock_t ipx_interfaces_lock;
 132
 133 extern struct ipx_interface *ipx_primary_net;
 134
 135 int ipx_proc_init(void);
 136 void ipx_proc_exit(void);
 137
 138 const char *ipx_frame_name(__be16);
 139 const char *ipx_device_name(struct ipx_interface *intrfc);
 140
 141 static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
 142 {
 143         refcount_inc(&intrfc->refcnt);
 144 }
 145
 146 void ipxitf_down(struct ipx_interface *intrfc);
 147 struct ipx_interface *ipxitf_find_using_net(__be32 net);
 148 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
 149 __be16 ipx_cksum(struct ipxhdr *packet, int length);
 150 int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
 151                      unsigned char *node);
 152 void ipxrtr_del_routes(struct ipx_interface *intrfc);
 153 int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
 154                         struct msghdr *msg, size_t len, int noblock);
 155 int ipxrtr_route_skb(struct sk_buff *skb);
 156 struct ipx_route *ipxrtr_lookup(__be32 net);
 157 int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
 158
 159 static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
 160 {
 161         if (refcount_dec_and_test(&intrfc->refcnt))
 162                 ipxitf_down(intrfc);
 163 }
 164
 165 static __inline__ void ipxrtr_hold(struct ipx_route *rt)
 166 {
 167                 refcount_inc(&rt->refcnt);
 168 }
 169
 170 static __inline__ void ipxrtr_put(struct ipx_route *rt)
 171 {
 172                 if (refcount_dec_and_test(&rt->refcnt))
 173                                         kfree(rt);
 174 }
 175 #endif /* _NET_INET_IPX_H_ */