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
ipx_hdr(struct sk_buff * skb)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
ipx_sk(struct sock * sk)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
ipxitf_hold(struct ipx_interface * intrfc)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
ipxitf_put(struct ipx_interface * intrfc)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
ipxrtr_hold(struct ipx_route * rt)164 static __inline__ void ipxrtr_hold(struct ipx_route *rt)
165 {
166 atomic_inc(&rt->refcnt);
167 }
168
ipxrtr_put(struct ipx_route * rt)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_ */
175