1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
4 | * operating system. INET is implemented using the BSD Socket |
5 | * interface as the means of communication with the user level. |
6 | * |
7 | * Definitions for the IP protocol. |
8 | * |
9 | * Version: @(#)ip.h 1.0.2 04/28/93 |
10 | * |
11 | * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
12 | * |
13 | * This program is free software; you can redistribute it and/or |
14 | * modify it under the terms of the GNU General Public License |
15 | * as published by the Free Software Foundation; either version |
16 | * 2 of the License, or (at your option) any later version. |
17 | */ |
18 | #ifndef _LINUX_IP_H |
19 | #define _LINUX_IP_H |
20 | #include <linux/types.h> |
21 | #include <asm/byteorder.h> |
22 | |
23 | #define IPTOS_TOS_MASK 0x1E |
24 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) |
25 | #define IPTOS_LOWDELAY 0x10 |
26 | #define IPTOS_THROUGHPUT 0x08 |
27 | #define IPTOS_RELIABILITY 0x04 |
28 | #define IPTOS_MINCOST 0x02 |
29 | |
30 | #define IPTOS_PREC_MASK 0xE0 |
31 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) |
32 | #define IPTOS_PREC_NETCONTROL 0xe0 |
33 | #define IPTOS_PREC_INTERNETCONTROL 0xc0 |
34 | #define IPTOS_PREC_CRITIC_ECP 0xa0 |
35 | #define IPTOS_PREC_FLASHOVERRIDE 0x80 |
36 | #define IPTOS_PREC_FLASH 0x60 |
37 | #define IPTOS_PREC_IMMEDIATE 0x40 |
38 | #define IPTOS_PREC_PRIORITY 0x20 |
39 | #define IPTOS_PREC_ROUTINE 0x00 |
40 | |
41 | |
42 | /* IP options */ |
43 | #define IPOPT_COPY 0x80 |
44 | #define IPOPT_CLASS_MASK 0x60 |
45 | #define IPOPT_NUMBER_MASK 0x1f |
46 | |
47 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) |
48 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) |
49 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) |
50 | |
51 | #define IPOPT_CONTROL 0x00 |
52 | #define IPOPT_RESERVED1 0x20 |
53 | #define IPOPT_MEASUREMENT 0x40 |
54 | #define IPOPT_RESERVED2 0x60 |
55 | |
56 | #define IPOPT_END (0 |IPOPT_CONTROL) |
57 | #define IPOPT_NOOP (1 |IPOPT_CONTROL) |
58 | #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) |
59 | #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY) |
60 | #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) |
61 | #define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY) |
62 | #define IPOPT_RR (7 |IPOPT_CONTROL) |
63 | #define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) |
64 | #define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY) |
65 | #define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) |
66 | |
67 | #define IPVERSION 4 |
68 | #define MAXTTL 255 |
69 | #define IPDEFTTL 64 |
70 | |
71 | #define IPOPT_OPTVAL 0 |
72 | #define IPOPT_OLEN 1 |
73 | #define IPOPT_OFFSET 2 |
74 | #define IPOPT_MINOFF 4 |
75 | #define MAX_IPOPTLEN 40 |
76 | #define IPOPT_NOP IPOPT_NOOP |
77 | #define IPOPT_EOL IPOPT_END |
78 | #define IPOPT_TS IPOPT_TIMESTAMP |
79 | |
80 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ |
81 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
82 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
83 | |
84 | #define IPV4_BEET_PHMAXLEN 8 |
85 | |
86 | struct iphdr { |
87 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
88 | __u8 ihl:4, |
89 | version:4; |
90 | #elif defined (__BIG_ENDIAN_BITFIELD) |
91 | __u8 version:4, |
92 | ihl:4; |
93 | #else |
94 | #error "Please fix <asm/byteorder.h>" |
95 | #endif |
96 | __u8 tos; |
97 | __be16 tot_len; |
98 | __be16 id; |
99 | __be16 frag_off; |
100 | __u8 ttl; |
101 | __u8 protocol; |
102 | __sum16 check; |
103 | __be32 saddr; |
104 | __be32 daddr; |
105 | /*The options start here. */ |
106 | }; |
107 | |
108 | |
109 | struct ip_auth_hdr { |
110 | __u8 nexthdr; |
111 | __u8 hdrlen; /* This one is measured in 32 bit units! */ |
112 | __be16 reserved; |
113 | __be32 spi; |
114 | __be32 seq_no; /* Sequence number */ |
115 | __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ |
116 | }; |
117 | |
118 | struct ip_esp_hdr { |
119 | __be32 spi; |
120 | __be32 seq_no; /* Sequence number */ |
121 | __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ |
122 | }; |
123 | |
124 | struct ip_comp_hdr { |
125 | __u8 nexthdr; |
126 | __u8 flags; |
127 | __be16 cpi; |
128 | }; |
129 | |
130 | struct ip_beet_phdr { |
131 | __u8 nexthdr; |
132 | __u8 hdrlen; |
133 | __u8 padlen; |
134 | __u8 reserved; |
135 | }; |
136 | |
137 | /* index values for the variables in ipv4_devconf */ |
138 | enum |
139 | { |
140 | IPV4_DEVCONF_FORWARDING=1, |
141 | IPV4_DEVCONF_MC_FORWARDING, |
142 | IPV4_DEVCONF_PROXY_ARP, |
143 | IPV4_DEVCONF_ACCEPT_REDIRECTS, |
144 | IPV4_DEVCONF_SECURE_REDIRECTS, |
145 | IPV4_DEVCONF_SEND_REDIRECTS, |
146 | IPV4_DEVCONF_SHARED_MEDIA, |
147 | IPV4_DEVCONF_RP_FILTER, |
148 | IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, |
149 | IPV4_DEVCONF_BOOTP_RELAY, |
150 | IPV4_DEVCONF_LOG_MARTIANS, |
151 | IPV4_DEVCONF_TAG, |
152 | IPV4_DEVCONF_ARPFILTER, |
153 | IPV4_DEVCONF_MEDIUM_ID, |
154 | IPV4_DEVCONF_NOXFRM, |
155 | IPV4_DEVCONF_NOPOLICY, |
156 | IPV4_DEVCONF_FORCE_IGMP_VERSION, |
157 | IPV4_DEVCONF_ARP_ANNOUNCE, |
158 | IPV4_DEVCONF_ARP_IGNORE, |
159 | IPV4_DEVCONF_PROMOTE_SECONDARIES, |
160 | IPV4_DEVCONF_ARP_ACCEPT, |
161 | IPV4_DEVCONF_ARP_NOTIFY, |
162 | IPV4_DEVCONF_ACCEPT_LOCAL, |
163 | IPV4_DEVCONF_SRC_VMARK, |
164 | IPV4_DEVCONF_PROXY_ARP_PVLAN, |
165 | IPV4_DEVCONF_ROUTE_LOCALNET, |
166 | IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL, |
167 | IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL, |
168 | IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN, |
169 | IPV4_DEVCONF_DROP_UNICAST_IN_L2_MULTICAST, |
170 | IPV4_DEVCONF_DROP_GRATUITOUS_ARP, |
171 | __IPV4_DEVCONF_MAX |
172 | }; |
173 | |
174 | #define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) |
175 | |
176 | #endif /* _LINUX_IP_H */ |
177 | |