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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1990 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution is only permitted until one year after the first shipment
6: * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
7: * binary forms are permitted provided that: (1) source distributions retain
8: * this entire copyright notice and comment, and (2) distributions including
9: * binaries display the following acknowledgement: This product includes
10: * software developed by the University of California, Berkeley and its
11: * contributors'' in the documentation or other materials provided with the
12: * distribution and in all advertising materials mentioning features or use
13: * of this software. Neither the name of the University nor the names of
14: * its contributors may be used to endorse or promote products derived from
15: * this software without specific prior written permission.
16: * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
18: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19: *
20: * @(#)in.h 7.10 (Berkeley) 6/28/90
21: */
22:
23: /*
24: * Constants and structures defined by the internet system,
25: * Per RFC 790, September 1981.
26: */
27:
28: /*
29: * Protocols
30: */
31: #define IPPROTO_IP 0 /* dummy for IP */
32: #define IPPROTO_ICMP 1 /* control message protocol */
33: #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */
34: #define IPPROTO_TCP 6 /* tcp */
35: #define IPPROTO_EGP 8 /* exterior gateway protocol */
36: #define IPPROTO_PUP 12 /* pup */
37: #define IPPROTO_UDP 17 /* user datagram protocol */
38: #define IPPROTO_IDP 22 /* xns idp */
39: #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
40: #define IPPROTO_EON 80 /* ISO cnlp */
41:
42: #define IPPROTO_RAW 255 /* raw IP packet */
43: #define IPPROTO_MAX 256
44:
45:
46: /*
47: * Local port number conventions:
48: * Ports < IPPORT_RESERVED are reserved for
49: * privileged processes (e.g. root).
50: * Ports > IPPORT_USERRESERVED are reserved
51: * for servers, not necessarily privileged.
52: */
53: #define IPPORT_RESERVED 1024
54: #define IPPORT_USERRESERVED 5000
55:
56: /*
57: * Internet address (a structure for historical reasons)
58: */
59: struct in_addr {
60: u_long s_addr;
61: };
62:
63: /*
64: * Definitions of bits in internet address integers.
65: * On subnets, the decomposition of addresses to host and net parts
66: * is done according to subnet mask, not the masks here.
67: */
68: #define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0)
69: #define IN_CLASSA_NET 0xff000000
70: #define IN_CLASSA_NSHIFT 24
71: #define IN_CLASSA_HOST 0x00ffffff
72: #define IN_CLASSA_MAX 128
73:
74: #define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000)
75: #define IN_CLASSB_NET 0xffff0000
76: #define IN_CLASSB_NSHIFT 16
77: #define IN_CLASSB_HOST 0x0000ffff
78: #define IN_CLASSB_MAX 65536
79:
80: #define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000)
81: #define IN_CLASSC_NET 0xffffff00
82: #define IN_CLASSC_NSHIFT 8
83: #define IN_CLASSC_HOST 0x000000ff
84:
85: #define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000)
86: #define IN_MULTICAST(i) IN_CLASSD(i)
87:
88: #define IN_EXPERIMENTAL(i) (((long)(i) & 0xe0000000) == 0xe0000000)
89: #define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000)
90:
91: #define INADDR_ANY (u_long)0x00000000
92: #define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */
93: #ifndef KERNEL
94: #define INADDR_NONE 0xffffffff /* -1 return */
95: #endif
96:
97: #define IN_LOOPBACKNET 127 /* official! */
98:
99: /*
100: * Socket address, internet style.
101: */
102: struct sockaddr_in {
103: u_char sin_len;
104: u_char sin_family;
105: u_short sin_port;
106: struct in_addr sin_addr;
107: char sin_zero[8];
108: };
109:
110: /*
111: * Structure used to describe IP options.
112: * Used to store options internally, to pass them to a process,
113: * or to restore options retrieved earlier.
114: * The ip_dst is used for the first-hop gateway when using a source route
115: * (this gets put into the header proper).
116: */
117: struct ip_opts {
118: struct in_addr ip_dst; /* first hop, 0 w/o src rt */
119: char ip_opts[40]; /* actually variable in size */
120: };
121:
122: /*
123: * Options for use with [gs]etsockopt at the IP level.
124: * First word of comment is data type; bool is stored in int.
125: */
126: #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP per-packet options */
127: #define IP_HDRINCL 2 /* int; header is included with data (raw) */
128: #define IP_TOS 3 /* int; IP type of service and precedence */
129: #define IP_TTL 4 /* int; IP time to live */
130: #define IP_RECVOPTS 5 /* bool; receive all IP options w/datagram */
131: #define IP_RECVRETOPTS 6 /* bool; receive IP options for response */
132: #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/datagram */
133: #define IP_RETOPTS 8 /* ip_opts; set/get IP per-packet options */
134:
135: #ifdef KERNEL
136: extern struct domain inetdomain;
137: extern struct protosw inetsw[];
138: struct in_addr in_makeaddr();
139: u_long in_netof(), in_lnaof();
140: #endif
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