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1 | /* SPDX-License-Identifier: GPL-2.0 */ | |
2 | #ifndef _NET_INET_IPX_H_ | |
3 | #define _NET_INET_IPX_H_ | |
4 | /* | |
5 | * The following information is in its entirety obtained from: | |
6 | * | |
7 | * Novell 'IPX Router Specification' Version 1.10 | |
8 | * Part No. 107-000029-001 | |
9 | * | |
10 | * Which is available from ftp.novell.com | |
11 | */ | |
12 | ||
13 | #include <linux/netdevice.h> | |
14 | #include <net/datalink.h> | |
15 | #include <linux/ipx.h> | |
16 | #include <linux/list.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/refcount.h> | |
19 | ||
20 | struct ipx_address { | |
21 | __be32 net; | |
22 | __u8 node[IPX_NODE_LEN]; | |
23 | __be16 sock; | |
24 | }; | |
25 | ||
26 | #define ipx_broadcast_node "\377\377\377\377\377\377" | |
27 | #define ipx_this_node "\0\0\0\0\0\0" | |
28 | ||
29 | #define IPX_MAX_PPROP_HOPS 8 | |
30 | ||
31 | struct ipxhdr { | |
32 | __be16 ipx_checksum __packed; | |
33 | #define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF) | |
34 | __be16 ipx_pktsize __packed; | |
35 | __u8 ipx_tctrl; | |
36 | __u8 ipx_type; | |
37 | #define IPX_TYPE_UNKNOWN 0x00 | |
38 | #define IPX_TYPE_RIP 0x01 /* may also be 0 */ | |
39 | #define IPX_TYPE_SAP 0x04 /* may also be 0 */ | |
40 | #define IPX_TYPE_SPX 0x05 /* SPX protocol */ | |
41 | #define IPX_TYPE_NCP 0x11 /* $lots for docs on this (SPIT) */ | |
42 | #define IPX_TYPE_PPROP 0x14 /* complicated flood fill brdcast */ | |
43 | struct ipx_address ipx_dest __packed; | |
44 | struct ipx_address ipx_source __packed; | |
45 | }; | |
46 | ||
47 | /* From af_ipx.c */ | |
48 | extern int sysctl_ipx_pprop_broadcasting; | |
49 | ||
50 | static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb) | |
51 | { | |
52 | return (struct ipxhdr *)skb_transport_header(skb); | |
53 | } | |
54 | ||
55 | struct ipx_interface { | |
56 | /* IPX address */ | |
57 | __be32 if_netnum; | |
58 | unsigned char if_node[IPX_NODE_LEN]; | |
59 | refcount_t refcnt; | |
60 | ||
61 | /* physical device info */ | |
62 | struct net_device *if_dev; | |
63 | struct datalink_proto *if_dlink; | |
64 | __be16 if_dlink_type; | |
65 | ||
66 | /* socket support */ | |
67 | unsigned short if_sknum; | |
68 | struct hlist_head if_sklist; | |
69 | spinlock_t if_sklist_lock; | |
70 | ||
71 | /* administrative overhead */ | |
72 | int if_ipx_offset; | |
73 | unsigned char if_internal; | |
74 | unsigned char if_primary; | |
75 | ||
76 | struct list_head node; /* node in ipx_interfaces list */ | |
77 | }; | |
78 | ||
79 | struct ipx_route { | |
80 | __be32 ir_net; | |
81 | struct ipx_interface *ir_intrfc; | |
82 | unsigned char ir_routed; | |
83 | unsigned char ir_router_node[IPX_NODE_LEN]; | |
84 | struct list_head node; /* node in ipx_routes list */ | |
85 | refcount_t refcnt; | |
86 | }; | |
87 | ||
88 | struct ipx_cb { | |
89 | u8 ipx_tctrl; | |
90 | __be32 ipx_dest_net; | |
91 | __be32 ipx_source_net; | |
92 | struct { | |
93 | __be32 netnum; | |
94 | int index; | |
95 | } last_hop; | |
96 | }; | |
97 | ||
98 | #include <net/sock.h> | |
99 | ||
100 | struct ipx_sock { | |
101 | /* struct sock has to be the first member of ipx_sock */ | |
102 | struct sock sk; | |
103 | struct ipx_address dest_addr; | |
104 | struct ipx_interface *intrfc; | |
105 | __be16 port; | |
106 | #ifdef CONFIG_IPX_INTERN | |
107 | unsigned char node[IPX_NODE_LEN]; | |
108 | #endif | |
109 | unsigned short type; | |
110 | /* | |
111 | * To handle special ncp connection-handling sockets for mars_nwe, | |
112 | * the connection number must be stored in the socket. | |
113 | */ | |
114 | unsigned short ipx_ncp_conn; | |
115 | }; | |
116 | ||
117 | static inline struct ipx_sock *ipx_sk(struct sock *sk) | |
118 | { | |
119 | return (struct ipx_sock *)sk; | |
120 | } | |
121 | ||
122 | #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0])) | |
123 | ||
124 | #define IPX_MIN_EPHEMERAL_SOCKET 0x4000 | |
125 | #define IPX_MAX_EPHEMERAL_SOCKET 0x7fff | |
126 | ||
127 | extern struct list_head ipx_routes; | |
128 | extern rwlock_t ipx_routes_lock; | |
129 | ||
130 | extern struct list_head ipx_interfaces; | |
131 | struct ipx_interface *ipx_interfaces_head(void); | |
132 | extern spinlock_t ipx_interfaces_lock; | |
133 | ||
134 | extern struct ipx_interface *ipx_primary_net; | |
135 | ||
136 | int ipx_proc_init(void); | |
137 | void ipx_proc_exit(void); | |
138 | ||
139 | const char *ipx_frame_name(__be16); | |
140 | const char *ipx_device_name(struct ipx_interface *intrfc); | |
141 | ||
142 | static __inline__ void ipxitf_hold(struct ipx_interface *intrfc) | |
143 | { | |
144 | refcount_inc(&intrfc->refcnt); | |
145 | } | |
146 | ||
147 | void ipxitf_down(struct ipx_interface *intrfc); | |
148 | struct ipx_interface *ipxitf_find_using_net(__be32 net); | |
149 | int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node); | |
150 | __be16 ipx_cksum(struct ipxhdr *packet, int length); | |
151 | int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, | |
152 | unsigned char *node); | |
153 | void ipxrtr_del_routes(struct ipx_interface *intrfc); | |
154 | int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, | |
155 | struct msghdr *msg, size_t len, int noblock); | |
156 | int ipxrtr_route_skb(struct sk_buff *skb); | |
157 | struct ipx_route *ipxrtr_lookup(__be32 net); | |
158 | int ipxrtr_ioctl(unsigned int cmd, void __user *arg); | |
159 | ||
160 | static __inline__ void ipxitf_put(struct ipx_interface *intrfc) | |
161 | { | |
162 | if (refcount_dec_and_test(&intrfc->refcnt)) | |
163 | ipxitf_down(intrfc); | |
164 | } | |
165 | ||
166 | static __inline__ void ipxrtr_hold(struct ipx_route *rt) | |
167 | { | |
168 | refcount_inc(&rt->refcnt); | |
169 | } | |
170 | ||
171 | static __inline__ void ipxrtr_put(struct ipx_route *rt) | |
172 | { | |
173 | if (refcount_dec_and_test(&rt->refcnt)) | |
174 | kfree(rt); | |
175 | } | |
176 | #endif /* _NET_INET_IPX_H_ */ |