about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/netinet/in.h
blob: b0c793e7cfbf9973bce41e8cd70959d1e30a16b5 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef	_NETINET_IN_H

#define	_NETINET_IN_H	1
#include <features.h>

#include <sys/socket.h>
#include <sys/types.h>


__BEGIN_DECLS

/* Standard well-defined IP protocols.  */
enum
  {
    IPPROTO_IP = 0,	 /* Dummy protocol for TCP.  */
    IPPROTO_ICMP = 1,	 /* Internet Control Message Protocol.  */
    IPPROTO_IGMP = 2,	 /* Internet Group Management Protocol. */
    IPPROTO_IPIP = 4,	 /* IPIP tunnels (older KA9Q tunnels use 94).  */
    IPPROTO_TCP = 6,	 /* Transmission Control Protocol.  */
    IPPROTO_EGP = 8,	 /* Exterior Gateway Protocol.  */
    IPPROTO_PUP = 12,	 /* PUP protocol.  */
    IPPROTO_UDP = 17,	 /* User Datagram Protocol.  */
    IPPROTO_IDP = 22,	 /* XNS IDP protocol.  */
    IPPROTO_IPV6 = 41,   /* IPv6-in-IPv4 tunnelling.  */
    IPPROTO_ICMPV6 = 58, /* ICMPv6.  */

    IPPROTO_RAW = 255,	 /* Raw IP packets.  */
    IPPROTO_MAX
  };

/* Standard well-known ports.  */
enum
  {
    IPPORT_ECHO = 7,		/* Echo service.  */
    IPPORT_DISCARD = 9,		/* Discard transmissions service.  */
    IPPORT_SYSTAT = 11,		/* System status service.  */
    IPPORT_DAYTIME = 13,	/* Time of day service.  */
    IPPORT_NETSTAT = 15,	/* Network status service.  */
    IPPORT_FTP = 21,		/* File Transfer Protocol.  */
    IPPORT_TELNET = 23,		/* Telnet protocol.  */
    IPPORT_SMTP = 25,		/* Simple Mail Transfer Protocol.  */
    IPPORT_TIMESERVER = 37,	/* Timeserver service.  */
    IPPORT_NAMESERVER = 42,	/* Domain Name Service.  */
    IPPORT_WHOIS = 43,		/* Internet Whois service.  */
    IPPORT_MTP = 57,

    IPPORT_TFTP = 69,		/* Trivial File Transfer Protocol.  */
    IPPORT_RJE = 77,
    IPPORT_FINGER = 79,		/* Finger service.  */
    IPPORT_TTYLINK = 87,
    IPPORT_SUPDUP = 95,		/* SUPDUP protocol.  */


    IPPORT_EXECSERVER = 512,	/* execd service.  */
    IPPORT_LOGINSERVER = 513,	/* rlogind service.  */
    IPPORT_CMDSERVER = 514,
    IPPORT_EFSSERVER = 520,

    /* UDP ports.  */
    IPPORT_BIFFUDP = 512,
    IPPORT_WHOSERVER = 513,
    IPPORT_ROUTESERVER = 520,

    /* Ports less than this value are reserved for privileged processes.  */
    IPPORT_RESERVED = 1024,

    /* Ports greater this value are reserved for (non-privileged) servers.  */
    IPPORT_USERRESERVED = 5000
  };


/* Internet address.  */
struct in_addr
  {
    unsigned int s_addr;
  };


/* Definitions of the bits in an Internet address integer.

   On subnets, host and network parts are found according to
   the subnet mask, not these masks.  */

#define	IN_CLASSA(a)		((((unsigned) (a)) & 0x80000000) == 0)
#define	IN_CLASSA_NET		0xff000000
#define	IN_CLASSA_NSHIFT	24
#define	IN_CLASSA_HOST		(0xffffffff & ~IN_CLASSA_NET)
#define	IN_CLASSA_MAX		128

#define	IN_CLASSB(a)		((((unsigned) (a)) & 0xc0000000) == 0x80000000)
#define	IN_CLASSB_NET		0xffff0000
#define	IN_CLASSB_NSHIFT	16
#define	IN_CLASSB_HOST		(0xffffffff & ~IN_CLASSB_NET)
#define	IN_CLASSB_MAX		65536

#define	IN_CLASSC(a)		((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
#define	IN_CLASSC_NET		0xffffff00
#define	IN_CLASSC_NSHIFT	8
#define	IN_CLASSC_HOST		(0xffffffff & ~IN_CLASSC_NET)

#define	IN_CLASSD(a)		((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
#define	IN_MULTICAST(a)		IN_CLASSD(a)

#define	IN_EXPERIMENTAL(a)	((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
#define	IN_BADCLASS(a)		((((unsigned) (a)) & 0xf0000000) == 0xf0000000)

/* Address to accept any incoming messages.  */
#define	INADDR_ANY		((unsigned) 0x00000000)
/* Address to send to all hosts.  */
#define	INADDR_BROADCAST	((unsigned) 0xffffffff)
/* Address indicating an error return.  */
#define	INADDR_NONE		((unsigned) 0xffffffff)

/* Network number for local host loopback.  */
#define	IN_LOOPBACKNET	127
/* Address to loopback in software to local host.  */
#ifndef INADDR_LOOPBACK
#define	INADDR_LOOPBACK	((unsigned) 0x7f000001)	/* Inet address 127.0.0.1.  */
#endif


/* IPv6 address */
struct in6_addr
  {
    union
      {
	u_int8_t	u6_addr8[16];
	u_int16_t	u6_addr16[8];
	u_int32_t	u6_addr32[4];
#if (~0UL) > 0xffffffff
	u_int64_t	u6_addr64[2];
#endif
      } in6_u;
#define s6_addr			in6_u.u6_addr8
#define s6_addr16		in6_u.u6_addr16
#define s6_addr32		in6_u.u6_addr32
#define s6_addr64		in6_u.u6_addr64
  };

extern const struct in6_addr in6addr_any;        /* :: */
extern const struct in6_addr in6addr_loopback;   /* ::1 */
#define IN6ADDR_ANY_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
#define IN6ADDR_LOOPBACK_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }

#define INET_ADDRSTRLEN 16
#define INET6_ADDRSTRLEN 46

/* Get the definition of the macro to define the common sockaddr members.  */
#include <sockaddrcom.h>


/* Structure describing an Internet socket address.  */
struct sockaddr_in
  {
    __SOCKADDR_COMMON (sin_);
    unsigned short int sin_port;	/* Port number.  */
    struct in_addr sin_addr;		/* Internet address.  */

    /* Pad to size of `struct sockaddr'.  */
    unsigned char sin_zero[sizeof(struct sockaddr) -
			   __SOCKADDR_COMMON_SIZE -
			   sizeof(unsigned short int) -
			   sizeof(struct in_addr)];
  };

/* Ditto, for IPv6.  */
struct sockaddr_in6
  {
    __SOCKADDR_COMMON (sin6_);
    u_int16_t		sin6_port;      /* Transport layer port # */
    u_int32_t		sin6_flowinfo;  /* IPv6 flow information */
    struct in6_addr	sin6_addr;      /* IPv6 address */
  };

/* IPv6 multicast request.  */
struct ipv6_mreq
  {
    /* IPv6 multicast address of group */
    struct in6_addr ipv6mr_multiaddr;

    /* local IPv6 address of interface */
    int		ipv6mr_ifindex;
  };


/* Options for use with `getsockopt' and `setsockopt' at the IP level.
   The first word in the comment at the right is the data type used;
   "bool" means a boolean value stored in an `int'.  */
#define	IP_TOS		   1	/* int; IP type of service and precedence.  */
#define	IP_TTL		   2	/* int; IP time to live.  */
#define	IP_HDRINCL	   3	/* int; Header is included with data.  */
#define	IP_OPTIONS	   4	/* ip_opts; IP per-packet options.  */
#define IP_MULTICAST_IF    32	/* in_addr; set/get IP multicast i/f */
#define IP_MULTICAST_TTL   33	/* u_char; set/get IP multicast ttl */
#define IP_MULTICAST_LOOP  34	/* i_char; set/get IP multicast loopback */
#define IP_ADD_MEMBERSHIP  35	/* ip_mreq; add an IP group membership */
#define IP_DROP_MEMBERSHIP 36	/* ip_mreq; drop an IP group membership */

/* To select the IP level.  */
#define SOL_IP	0

/* Structure used to describe IP options for IP_OPTIONS. The `ip_dst'
   field is used for the first-hop gateway when using a source route
   (this gets put into the header proper).  */
struct ip_opts
  {
    struct in_addr ip_dst;	/* First hop; zero without source route.  */
    char ip_opts[40];		/* Actually variable in size.  */
  };

/* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
struct ip_mreq
  {
    struct in_addr imr_multiaddr;	/* IP multicast address of group */
    struct in_addr imr_interface;	/* local IP address of interface */
  };

/* Functions to convert between host and network byte order.

   Please note that these functions normally take `unsigned long int' or
   `unsigned short int' values as arguments and also return them.  But
   this was a short-sighted decision since on different systems the types
   may have different representations but the values are always the same.  */

extern u_int32_t ntohl __P ((u_int32_t __netlong));
extern u_int16_t ntohs __P ((u_int16_t __netshort));
extern u_int32_t htonl __P ((u_int32_t __hostlong));
extern u_int16_t htons __P ((u_int16_t __hostshort));

#include <endian.h>

#if __BYTE_ORDER == __BIG_ENDIAN
/* The host byte order is the same as network byte order,
   so these functions are all just identity.  */
#define	ntohl(x)	(x)
#define	ntohs(x)	(x)
#define	htonl(x)	(x)
#define	htons(x)	(x)
#endif


/* IPV6 socket options.  */
#define IPV6_ADDRFORM		1
#define IPV6_PKTINFO		2
#define IPV6_RXHOPOPTS		3
#define IPV6_RXDSTOPTS		4
#define IPV6_RXSRCRT		5
#define IPV6_PKTOPTIONS		6
#define IPV6_CHECKSUM		7
#define IPV6_HOPLIMIT		8

#define SCM_SRCRT		IPV6_RXSRCRT

#define IPV6_UNICAST_HOPS	16
#define IPV6_MULTICAST_IF	17
#define IPV6_MULTICAST_HOPS	18
#define IPV6_MULTICAST_LOOP	19
#define IPV6_ADD_MEMBERSHIP	20
#define IPV6_DROP_MEMBERSHIP	21

#define IN6_IS_ADDR_UNSPECIFIED(a) \
        ((((u_int32_t *)(a))[0] == 0) && ((u_int32_t *)(a))[1] == 0) && \
         (((u_int32_t *)(a))[2] == 0) && ((u_int32_t *)(a))[3] == 0))

#define IN6_IS_ADDR_LOOPBACK(a) \
        ((((u_int32_t *)(a))[0] == 0) && ((u_int32_t *)(a))[1] == 0) && \
         (((u_int32_t *)(a))[2] == 0) && ((u_int32_t *)(a))[3] == htonl(1)))

#define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t *)(a))[0] == 0xff)

#define IN6_IS_ADDR_LINKLOCAL(a) \
        ((((u_int32_t *)(a))[0] & htonl(0xffc00000)) == htonl(0xfe800000))

#define IN6_IS_ADDR_SITELOCAL(a) \
        ((((u_int32_t *)(a))[0] & htonl(0xffc00000)) == htonl(0xfec00000))

#define IN6_IS_ADDR_V4MAPPED(a) \
        ((((u_int32_t *)(a))[0] == 0) && (((u_int32_t *)(a))[1] == 0) && \
         (((u_int32_t *)(a))[2] == htonl(0xffff)))

#define IN6_IS_ADDR_V4COMPAT(a) \
        ((((u_int32_t *)(a))[0] == 0) && (((u_int32_t *)(a))[1] == 0) && \
         (((u_int32_t *)(a))[2] == 0) && (ntohl(((u_int32_t *)(a))[3]) > 1))


/* Bind socket to a privileged IP port.  */
extern int bindresvport __P ((int __sockfd, struct sockaddr_in *__sin));


/* IPv6 packet information.  */
struct in6_pktinfo 
  {
    struct in6_addr ipi6_addr;    /* src/dst IPv6 address */
    int             ipi6_ifindex; /* send/recv interface index */
  };

__END_DECLS

#endif	/* netinet/in.h */