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
  18 struct 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
  29 struct 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 */
  46 extern int sysctl_ipx_pprop_broadcasting;
  47
  48 static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
  49 {
  50         return (struct ipxhdr *)skb_transport_header(skb);
  51 }
  52
  53 struct 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
  77 struct 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
  86 struct 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
  98 struct 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
 115 static 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
 125 extern struct list_head ipx_routes;
 126 extern rwlock_t ipx_routes_lock;
 127
 128 extern struct list_head ipx_interfaces;
 129 struct ipx_interface *ipx_interfaces_head(void);
 130 extern spinlock_t ipx_interfaces_lock;
 131
 132 extern struct ipx_interface *ipx_primary_net;
 133
 134 int ipx_proc_init(void);
 135 void ipx_proc_exit(void);
 136
 137 const char *ipx_frame_name(__be16);
 138 const char *ipx_device_name(struct ipx_interface *intrfc);
 139
 140 static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
 141 {
 142         atomic_inc(&intrfc->refcnt);
 143 }
 144
 145 void ipxitf_down(struct ipx_interface *intrfc);
 146 struct ipx_interface *ipxitf_find_using_net(__be32 net);
 147 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
 148 __be16 ipx_cksum(struct ipxhdr *packet, int length);
 149 int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
 150                      unsigned char *node);
 151 void ipxrtr_del_routes(struct ipx_interface *intrfc);
 152 int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
 153                         struct msghdr *msg, size_t len, int noblock);
 154 int ipxrtr_route_skb(struct sk_buff *skb);
 155 struct ipx_route *ipxrtr_lookup(__be32 net);
 156 int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
 157
 158 static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
 159 {
 160         if (atomic_dec_and_test(&intrfc->refcnt))
 161                 ipxitf_down(intrfc);
 162 }
 163
 164 static __inline__ void ipxrtr_hold(struct ipx_route *rt)
 165 {
 166                 atomic_inc(&rt->refcnt);
 167 }
 168
 169 static __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_ */