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 of the Internet Protocol.
7 *
8 * Version: @(#)in.h 1.0.1 04/21/93
9 *
10 * Authors: Original taken from the GNU Project <netinet/in.h> file.
11 * 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_IN_H
19 #define _LINUX_IN_H
20
21 #include <linux/types.h>
22 #include <linux/socket.h>
23
24 /* Standard well-defined IP protocols. */
25 enum {
26 IPPROTO_IP = 0, /* Dummy protocol for TCP */
27 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */
28 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */
29 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
30 IPPROTO_TCP = 6, /* Transmission Control Protocol */
31 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */
32 IPPROTO_PUP = 12, /* PUP protocol */
33 IPPROTO_UDP = 17, /* User Datagram Protocol */
34 IPPROTO_IDP = 22, /* XNS IDP protocol */
35 IPPROTO_RSVP = 46, /* RSVP protocol */
36 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
37
38 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
39
40 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
41 IPPROTO_AH = 51, /* Authentication Header protocol */
42 IPPROTO_PIM = 103, /* Protocol Independent Multicast */
43
44 IPPROTO_COMP = 108, /* Compression Header protocol */
45 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
46
47 IPPROTO_RAW = 255, /* Raw IP packets */
48 IPPROTO_MAX
49 };
50
51
52 /* Internet address. */
53 struct in_addr {
54 __u32 s_addr;
55 };
56
57 #define IP_TOS 1
58 #define IP_TTL 2
59 #define IP_HDRINCL 3
60 #define IP_OPTIONS 4
61 #define IP_ROUTER_ALERT 5
62 #define IP_RECVOPTS 6
63 #define IP_RETOPTS 7
64 #define IP_PKTINFO 8
65 #define IP_PKTOPTIONS 9
66 #define IP_MTU_DISCOVER 10
67 #define IP_RECVERR 11
68 #define IP_RECVTTL 12
69 #define IP_RECVTOS 13
70 #define IP_MTU 14
71 #define IP_FREEBIND 15
72 #define IP_IPSEC_POLICY 16
73 #define IP_XFRM_POLICY 17
74
75 /* BSD compatibility */
76 #define IP_RECVRETOPTS IP_RETOPTS
77
78 /* IP_MTU_DISCOVER values */
79 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
80 #define IP_PMTUDISC_WANT 1 /* Use per route hints */
81 #define IP_PMTUDISC_DO 2 /* Always DF */
82
83 #define IP_MULTICAST_IF 32
84 #define IP_MULTICAST_TTL 33
85 #define IP_MULTICAST_LOOP 34
86 #define IP_ADD_MEMBERSHIP 35
87 #define IP_DROP_MEMBERSHIP 36
88 #define IP_UNBLOCK_SOURCE 37
89 #define IP_BLOCK_SOURCE 38
90 #define IP_ADD_SOURCE_MEMBERSHIP 39
91 #define IP_DROP_SOURCE_MEMBERSHIP 40
92 #define IP_MSFILTER 41
93 #define MCAST_JOIN_GROUP 42
94 #define MCAST_BLOCK_SOURCE 43
95 #define MCAST_UNBLOCK_SOURCE 44
96 #define MCAST_LEAVE_GROUP 45
97 #define MCAST_JOIN_SOURCE_GROUP 46
98 #define MCAST_LEAVE_SOURCE_GROUP 47
99 #define MCAST_MSFILTER 48
100
101 #define MCAST_EXCLUDE 0
102 #define MCAST_INCLUDE 1
103
104 /* These need to appear somewhere around here */
105 #define IP_DEFAULT_MULTICAST_TTL 1
106 #define IP_DEFAULT_MULTICAST_LOOP 1
107
108 /* Request struct for multicast socket ops */
109
110 struct ip_mreq
111 {
112 struct in_addr imr_multiaddr; /* IP multicast address of group */
113 struct in_addr imr_interface; /* local IP address of interface */
114 };
115
116 struct ip_mreqn
117 {
118 struct in_addr imr_multiaddr; /* IP multicast address of group */
119 struct in_addr imr_address; /* local IP address of interface */
120 int imr_ifindex; /* Interface index */
121 };
122
123 struct ip_mreq_source {
124 __u32 imr_multiaddr;
125 __u32 imr_interface;
126 __u32 imr_sourceaddr;
127 };
128
129 struct ip_msfilter {
130 __u32 imsf_multiaddr;
131 __u32 imsf_interface;
132 __u32 imsf_fmode;
133 __u32 imsf_numsrc;
134 __u32 imsf_slist[1];
135 };
136
137 #define IP_MSFILTER_SIZE(numsrc) \
138 (sizeof(struct ip_msfilter) - sizeof(__u32) \
139 + (numsrc) * sizeof(__u32))
140
141 struct group_req
142 {
143 __u32 gr_interface; /* interface index */
144 struct __kernel_sockaddr_storage gr_group; /* group address */
145 };
146
147 struct group_source_req
148 {
149 __u32 gsr_interface; /* interface index */
150 struct __kernel_sockaddr_storage gsr_group; /* group address */
151 struct __kernel_sockaddr_storage gsr_source; /* source address */
152 };
153
154 struct group_filter
155 {
156 __u32 gf_interface; /* interface index */
157 struct __kernel_sockaddr_storage gf_group; /* multicast address */
158 __u32 gf_fmode; /* filter mode */
159 __u32 gf_numsrc; /* number of sources */
160 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
161 };
162
163 #define GROUP_FILTER_SIZE(numsrc) \
164 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
165 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
166
167 struct in_pktinfo
168 {
169 int ipi_ifindex;
170 struct in_addr ipi_spec_dst;
171 struct in_addr ipi_addr;
172 };
173
174 /* Structure describing an Internet (IP) socket address. */
175 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
176 struct sockaddr_in {
177 sa_family_t sin_family; /* Address family */
178 unsigned short int sin_port; /* Port number */
179 struct in_addr sin_addr; /* Internet address */
180
181 /* Pad to size of `struct sockaddr'. */
182 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
183 sizeof(unsigned short int) - sizeof(struct in_addr)];
184 };
185 #define sin_zero __pad /* for BSD UNIX comp. -FvK */
186
187
188 /*
189 * Definitions of the bits in an Internet address integer.
190 * On subnets, host and network parts are found according
191 * to the subnet mask, not these masks.
192 */
193 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
194 #define IN_CLASSA_NET 0xff000000
195 #define IN_CLASSA_NSHIFT 24
196 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
197 #define IN_CLASSA_MAX 128
198
199 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
200 #define IN_CLASSB_NET 0xffff0000
201 #define IN_CLASSB_NSHIFT 16
202 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
203 #define IN_CLASSB_MAX 65536
204
205 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
206 #define IN_CLASSC_NET 0xffffff00
207 #define IN_CLASSC_NSHIFT 8
208 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
209
210 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
211 #define IN_MULTICAST(a) IN_CLASSD(a)
212 #define IN_MULTICAST_NET 0xF0000000
213
214 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
215 #define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
216
217 /* Address to accept any incoming messages. */
218 #define INADDR_ANY ((unsigned long int) 0x00000000)
219
220 /* Address to send to all hosts. */
221 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
222
223 /* Address indicating an error return. */
224 #define INADDR_NONE ((unsigned long int) 0xffffffff)
225
226 /* Network number for local host loopback. */
227 #define IN_LOOPBACKNET 127
228
229 /* Address to loopback in software to local host. */
230 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
231 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
232
233 /* Defines for Multicast INADDR */
234 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
235 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
236 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
237 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
238
239
240 /* <asm/byteorder.h> contains the htonl type stuff.. */
241 #include <asm/byteorder.h>
242
243 #ifdef __KERNEL__
244 /* Some random defines to make it easier in the kernel.. */
245 #define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
246 #define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
247 #define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
248 #define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000))
249 #define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
250
251 #endif
252
253 #endif /* _LINUX_IN_H */
254
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