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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#include <linux/refcount.h>
18
19struct 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
30struct 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 */
47extern int sysctl_ipx_pprop_broadcasting;
48
49static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
50{
51 return (struct ipxhdr *)skb_transport_header(skb);
52}
53
54struct 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
78struct 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
87struct 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
99struct 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
116static 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
126extern struct list_head ipx_routes;
127extern rwlock_t ipx_routes_lock;
128
129extern struct list_head ipx_interfaces;
130struct ipx_interface *ipx_interfaces_head(void);
131extern spinlock_t ipx_interfaces_lock;
132
133extern struct ipx_interface *ipx_primary_net;
134
135int ipx_proc_init(void);
136void ipx_proc_exit(void);
137
138const char *ipx_frame_name(__be16);
139const char *ipx_device_name(struct ipx_interface *intrfc);
140
141static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
142{
143 refcount_inc(&intrfc->refcnt);
144}
145
146void ipxitf_down(struct ipx_interface *intrfc);
147struct ipx_interface *ipxitf_find_using_net(__be32 net);
148int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
149__be16 ipx_cksum(struct ipxhdr *packet, int length);
150int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
151 unsigned char *node);
152void ipxrtr_del_routes(struct ipx_interface *intrfc);
153int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
154 struct msghdr *msg, size_t len, int noblock);
155int ipxrtr_route_skb(struct sk_buff *skb);
156struct ipx_route *ipxrtr_lookup(__be32 net);
157int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
158
159static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
160{
161 if (refcount_dec_and_test(&intrfc->refcnt))
162 ipxitf_down(intrfc);
163}
164
165static __inline__ void ipxrtr_hold(struct ipx_route *rt)
166{
167 refcount_inc(&rt->refcnt);
168}
169
170static __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_ */