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1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
3 | * operating system. INET is implemented using the BSD Socket |
4 | * interface as the means of communication with the user level. |
5 | * |
6 | * Definitions for the IP protocol. |
7 | * |
8 | * Version: @(#)ip.h 1.0.2 04/28/93 |
9 | * |
10 | * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
11 | * |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public License |
14 | * as published by the Free Software Foundation; either version |
15 | * 2 of the License, or (at your option) any later version. |
16 | */ |
17 | #ifndef _LINUX_IP_H |
18 | #define _LINUX_IP_H |
19 | #include <linux/types.h> |
20 | #include <asm/byteorder.h> |
21 | |
22 | #define IPTOS_TOS_MASK 0x1E |
23 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) |
24 | #define IPTOS_LOWDELAY 0x10 |
25 | #define IPTOS_THROUGHPUT 0x08 |
26 | #define IPTOS_RELIABILITY 0x04 |
27 | #define IPTOS_MINCOST 0x02 |
28 | |
29 | #define IPTOS_PREC_MASK 0xE0 |
30 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) |
31 | #define IPTOS_PREC_NETCONTROL 0xe0 |
32 | #define IPTOS_PREC_INTERNETCONTROL 0xc0 |
33 | #define IPTOS_PREC_CRITIC_ECP 0xa0 |
34 | #define IPTOS_PREC_FLASHOVERRIDE 0x80 |
35 | #define IPTOS_PREC_FLASH 0x60 |
36 | #define IPTOS_PREC_IMMEDIATE 0x40 |
37 | #define IPTOS_PREC_PRIORITY 0x20 |
38 | #define IPTOS_PREC_ROUTINE 0x00 |
39 | |
40 | |
41 | /* IP options */ |
42 | #define IPOPT_COPY 0x80 |
43 | #define IPOPT_CLASS_MASK 0x60 |
44 | #define IPOPT_NUMBER_MASK 0x1f |
45 | |
46 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) |
47 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) |
48 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) |
49 | |
50 | #define IPOPT_CONTROL 0x00 |
51 | #define IPOPT_RESERVED1 0x20 |
52 | #define IPOPT_MEASUREMENT 0x40 |
53 | #define IPOPT_RESERVED2 0x60 |
54 | |
55 | #define IPOPT_END (0 |IPOPT_CONTROL) |
56 | #define IPOPT_NOOP (1 |IPOPT_CONTROL) |
57 | #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) |
58 | #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY) |
59 | #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) |
60 | #define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY) |
61 | #define IPOPT_RR (7 |IPOPT_CONTROL) |
62 | #define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) |
63 | #define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY) |
64 | #define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) |
65 | |
66 | #define IPVERSION 4 |
67 | #define MAXTTL 255 |
68 | #define IPDEFTTL 64 |
69 | |
70 | #define IPOPT_OPTVAL 0 |
71 | #define IPOPT_OLEN 1 |
72 | #define IPOPT_OFFSET 2 |
73 | #define IPOPT_MINOFF 4 |
74 | #define MAX_IPOPTLEN 40 |
75 | #define IPOPT_NOP IPOPT_NOOP |
76 | #define IPOPT_EOL IPOPT_END |
77 | #define IPOPT_TS IPOPT_TIMESTAMP |
78 | |
79 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ |
80 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
81 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
82 | |
83 | #define IPV4_BEET_PHMAXLEN 8 |
84 | |
85 | struct iphdr { |
86 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
87 | __u8 ihl:4, |
88 | version:4; |
89 | #elif defined (__BIG_ENDIAN_BITFIELD) |
90 | __u8 version:4, |
91 | ihl:4; |
92 | #else |
93 | #error "Please fix <asm/byteorder.h>" |
94 | #endif |
95 | __u8 tos; |
96 | __be16 tot_len; |
97 | __be16 id; |
98 | __be16 frag_off; |
99 | __u8 ttl; |
100 | __u8 protocol; |
101 | __sum16 check; |
102 | __be32 saddr; |
103 | __be32 daddr; |
104 | /*The options start here. */ |
105 | }; |
106 | |
107 | #ifdef __KERNEL__ |
108 | #include <linux/skbuff.h> |
109 | |
110 | static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
111 | { |
112 | return (struct iphdr *)skb_network_header(skb); |
113 | } |
114 | |
115 | static inline struct iphdr *ipip_hdr(const struct sk_buff *skb) |
116 | { |
117 | return (struct iphdr *)skb_transport_header(skb); |
118 | } |
119 | #endif |
120 | |
121 | struct ip_auth_hdr { |
122 | __u8 nexthdr; |
123 | __u8 hdrlen; /* This one is measured in 32 bit units! */ |
124 | __be16 reserved; |
125 | __be32 spi; |
126 | __be32 seq_no; /* Sequence number */ |
127 | __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ |
128 | }; |
129 | |
130 | struct ip_esp_hdr { |
131 | __be32 spi; |
132 | __be32 seq_no; /* Sequence number */ |
133 | __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ |
134 | }; |
135 | |
136 | struct ip_comp_hdr { |
137 | __u8 nexthdr; |
138 | __u8 flags; |
139 | __be16 cpi; |
140 | }; |
141 | |
142 | struct ip_beet_phdr { |
143 | __u8 nexthdr; |
144 | __u8 hdrlen; |
145 | __u8 padlen; |
146 | __u8 reserved; |
147 | }; |
148 | |
149 | #endif /* _LINUX_IP_H */ |
150 |
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