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TOMOYO Linux Cross Reference
Linux/include/net/ipx.h

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  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 static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
 46 {
 47         return (struct ipxhdr *)skb_transport_header(skb);
 48 }
 49 
 50 struct ipx_interface {
 51         /* IPX address */
 52         __be32                  if_netnum;
 53         unsigned char           if_node[IPX_NODE_LEN];
 54         atomic_t                refcnt;
 55 
 56         /* physical device info */
 57         struct net_device       *if_dev;
 58         struct datalink_proto   *if_dlink;
 59         __be16                  if_dlink_type;
 60 
 61         /* socket support */
 62         unsigned short          if_sknum;
 63         struct hlist_head       if_sklist;
 64         spinlock_t              if_sklist_lock;
 65 
 66         /* administrative overhead */
 67         int                     if_ipx_offset;
 68         unsigned char           if_internal;
 69         unsigned char           if_primary;
 70         
 71         struct list_head        node; /* node in ipx_interfaces list */
 72 };
 73 
 74 struct ipx_route {
 75         __be32                  ir_net;
 76         struct ipx_interface    *ir_intrfc;
 77         unsigned char           ir_routed;
 78         unsigned char           ir_router_node[IPX_NODE_LEN];
 79         struct list_head        node; /* node in ipx_routes list */
 80         atomic_t                refcnt;
 81 };
 82 
 83 #ifdef __KERNEL__
 84 struct ipx_cb {
 85         u8      ipx_tctrl;
 86         __be32  ipx_dest_net;
 87         __be32  ipx_source_net;
 88         struct {
 89                 __be32 netnum;
 90                 int index;
 91         } last_hop;
 92 };
 93 
 94 #include <net/sock.h>
 95 
 96 struct ipx_sock {
 97         /* struct sock has to be the first member of ipx_sock */
 98         struct sock             sk;
 99         struct ipx_address      dest_addr;
100         struct ipx_interface    *intrfc;
101         __be16                  port;
102 #ifdef CONFIG_IPX_INTERN
103         unsigned char           node[IPX_NODE_LEN];
104 #endif
105         unsigned short          type;
106         /*
107          * To handle special ncp connection-handling sockets for mars_nwe,
108          * the connection number must be stored in the socket.
109          */
110         unsigned short          ipx_ncp_conn;
111 };
112 
113 static inline struct ipx_sock *ipx_sk(struct sock *sk)
114 {
115         return (struct ipx_sock *)sk;
116 }
117 
118 #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
119 #endif
120 
121 #define IPX_MIN_EPHEMERAL_SOCKET        0x4000
122 #define IPX_MAX_EPHEMERAL_SOCKET        0x7fff
123 
124 extern struct list_head ipx_routes;
125 extern rwlock_t ipx_routes_lock;
126 
127 extern struct list_head ipx_interfaces;
128 extern struct ipx_interface *ipx_interfaces_head(void);
129 extern spinlock_t ipx_interfaces_lock;
130 
131 extern struct ipx_interface *ipx_primary_net;
132 
133 extern int ipx_proc_init(void);
134 extern void ipx_proc_exit(void);
135 
136 extern const char *ipx_frame_name(__be16);
137 extern const char *ipx_device_name(struct ipx_interface *intrfc);
138 
139 static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
140 {
141         atomic_inc(&intrfc->refcnt);
142 }
143 
144 extern void ipxitf_down(struct ipx_interface *intrfc);
145 
146 static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
147 {
148         if (atomic_dec_and_test(&intrfc->refcnt))
149                 ipxitf_down(intrfc);
150 }
151 
152 static __inline__ void ipxrtr_hold(struct ipx_route *rt)
153 {
154                 atomic_inc(&rt->refcnt);
155 }
156 
157 static __inline__ void ipxrtr_put(struct ipx_route *rt)
158 {
159                 if (atomic_dec_and_test(&rt->refcnt))
160                                         kfree(rt);
161 }
162 #endif /* _NET_INET_IPX_H_ */
163 

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