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in.h
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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 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, <[email protected]>
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 _UAPI_LINUX_IN_H
19 #define _UAPI_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_DCCP = 33, /* Datagram Congestion Control Protocol */
36  IPPROTO_RSVP = 46, /* RSVP protocol */
37  IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
38 
39  IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
40 
41  IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
42  IPPROTO_AH = 51, /* Authentication Header protocol */
43  IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */
44  IPPROTO_PIM = 103, /* Protocol Independent Multicast */
45 
46  IPPROTO_COMP = 108, /* Compression Header protocol */
47  IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
48  IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
49 
50  IPPROTO_RAW = 255, /* Raw IP packets */
51  IPPROTO_MAX
52 };
53 
54 
55 /* Internet address. */
56 struct in_addr {
57  __be32 s_addr;
58 };
59 
60 #define IP_TOS 1
61 #define IP_TTL 2
62 #define IP_HDRINCL 3
63 #define IP_OPTIONS 4
64 #define IP_ROUTER_ALERT 5
65 #define IP_RECVOPTS 6
66 #define IP_RETOPTS 7
67 #define IP_PKTINFO 8
68 #define IP_PKTOPTIONS 9
69 #define IP_MTU_DISCOVER 10
70 #define IP_RECVERR 11
71 #define IP_RECVTTL 12
72 #define IP_RECVTOS 13
73 #define IP_MTU 14
74 #define IP_FREEBIND 15
75 #define IP_IPSEC_POLICY 16
76 #define IP_XFRM_POLICY 17
77 #define IP_PASSSEC 18
78 #define IP_TRANSPARENT 19
79 
80 /* BSD compatibility */
81 #define IP_RECVRETOPTS IP_RETOPTS
82 
83 /* TProxy original addresses */
84 #define IP_ORIGDSTADDR 20
85 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
86 
87 #define IP_MINTTL 21
88 #define IP_NODEFRAG 22
89 
90 /* IP_MTU_DISCOVER values */
91 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
92 #define IP_PMTUDISC_WANT 1 /* Use per route hints */
93 #define IP_PMTUDISC_DO 2 /* Always DF */
94 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
95 
96 #define IP_MULTICAST_IF 32
97 #define IP_MULTICAST_TTL 33
98 #define IP_MULTICAST_LOOP 34
99 #define IP_ADD_MEMBERSHIP 35
100 #define IP_DROP_MEMBERSHIP 36
101 #define IP_UNBLOCK_SOURCE 37
102 #define IP_BLOCK_SOURCE 38
103 #define IP_ADD_SOURCE_MEMBERSHIP 39
104 #define IP_DROP_SOURCE_MEMBERSHIP 40
105 #define IP_MSFILTER 41
106 #define MCAST_JOIN_GROUP 42
107 #define MCAST_BLOCK_SOURCE 43
108 #define MCAST_UNBLOCK_SOURCE 44
109 #define MCAST_LEAVE_GROUP 45
110 #define MCAST_JOIN_SOURCE_GROUP 46
111 #define MCAST_LEAVE_SOURCE_GROUP 47
112 #define MCAST_MSFILTER 48
113 #define IP_MULTICAST_ALL 49
114 #define IP_UNICAST_IF 50
115 
116 #define MCAST_EXCLUDE 0
117 #define MCAST_INCLUDE 1
118 
119 /* These need to appear somewhere around here */
120 #define IP_DEFAULT_MULTICAST_TTL 1
121 #define IP_DEFAULT_MULTICAST_LOOP 1
122 
123 /* Request struct for multicast socket ops */
124 
125 struct ip_mreq {
126  struct in_addr imr_multiaddr; /* IP multicast address of group */
127  struct in_addr imr_interface; /* local IP address of interface */
128 };
129 
130 struct ip_mreqn {
131  struct in_addr imr_multiaddr; /* IP multicast address of group */
132  struct in_addr imr_address; /* local IP address of interface */
133  int imr_ifindex; /* Interface index */
134 };
135 
136 struct ip_mreq_source {
137  __be32 imr_multiaddr;
138  __be32 imr_interface;
139  __be32 imr_sourceaddr;
140 };
141 
142 struct ip_msfilter {
143  __be32 imsf_multiaddr;
144  __be32 imsf_interface;
145  __u32 imsf_fmode;
146  __u32 imsf_numsrc;
147  __be32 imsf_slist[1];
148 };
149 
150 #define IP_MSFILTER_SIZE(numsrc) \
151  (sizeof(struct ip_msfilter) - sizeof(__u32) \
152  + (numsrc) * sizeof(__u32))
153 
154 struct group_req {
155  __u32 gr_interface; /* interface index */
156  struct __kernel_sockaddr_storage gr_group; /* group address */
157 };
158 
159 struct group_source_req {
160  __u32 gsr_interface; /* interface index */
161  struct __kernel_sockaddr_storage gsr_group; /* group address */
162  struct __kernel_sockaddr_storage gsr_source; /* source address */
163 };
164 
165 struct group_filter {
166  __u32 gf_interface; /* interface index */
167  struct __kernel_sockaddr_storage gf_group; /* multicast address */
168  __u32 gf_fmode; /* filter mode */
169  __u32 gf_numsrc; /* number of sources */
170  struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
171 };
172 
173 #define GROUP_FILTER_SIZE(numsrc) \
174  (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
175  + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
176 
177 struct in_pktinfo {
178  int ipi_ifindex;
179  struct in_addr ipi_spec_dst;
180  struct in_addr ipi_addr;
181 };
182 
183 /* Structure describing an Internet (IP) socket address. */
184 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
185 struct sockaddr_in {
186  __kernel_sa_family_t sin_family; /* Address family */
187  __be16 sin_port; /* Port number */
188  struct in_addr sin_addr; /* Internet address */
189 
190  /* Pad to size of `struct sockaddr'. */
191  unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
192  sizeof(unsigned short int) - sizeof(struct in_addr)];
193 };
194 #define sin_zero __pad /* for BSD UNIX comp. -FvK */
195 
196 
197 /*
198  * Definitions of the bits in an Internet address integer.
199  * On subnets, host and network parts are found according
200  * to the subnet mask, not these masks.
201  */
202 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
203 #define IN_CLASSA_NET 0xff000000
204 #define IN_CLASSA_NSHIFT 24
205 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
206 #define IN_CLASSA_MAX 128
207 
208 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
209 #define IN_CLASSB_NET 0xffff0000
210 #define IN_CLASSB_NSHIFT 16
211 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
212 #define IN_CLASSB_MAX 65536
213 
214 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
215 #define IN_CLASSC_NET 0xffffff00
216 #define IN_CLASSC_NSHIFT 8
217 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
218 
219 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
220 #define IN_MULTICAST(a) IN_CLASSD(a)
221 #define IN_MULTICAST_NET 0xF0000000
222 
223 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
224 #define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
225 
226 /* Address to accept any incoming messages. */
227 #define INADDR_ANY ((unsigned long int) 0x00000000)
228 
229 /* Address to send to all hosts. */
230 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
231 
232 /* Address indicating an error return. */
233 #define INADDR_NONE ((unsigned long int) 0xffffffff)
234 
235 /* Network number for local host loopback. */
236 #define IN_LOOPBACKNET 127
237 
238 /* Address to loopback in software to local host. */
239 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
240 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
241 
242 /* Defines for Multicast INADDR */
243 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
244 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
245 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
246 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
247 
248 
249 /* <asm/byteorder.h> contains the htonl type stuff.. */
250 #include <asm/byteorder.h>
251 
252 
253 #endif /* _UAPI_LINUX_IN_H */
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