projects / unix-history / blame
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|---|---|---|
| 97ee408e KM |
1 | .\" Copyright (c) 1983 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 5d512b67 | 5 | .\" @(#)inet.4 6.1 (Berkeley) %G% |
| 97ee408e | 6 | .\" |
| 5d512b67 | 7 | .TH INET 4F "" |
| 97ee408e KM |
8 | .UC 5 |
| 9 | .SH NAME | |
| 10 | inet \- Internet protocol family | |
| 11 | .SH SYNOPSIS | |
| 12 | .B #include <sys/types.h> | |
| 13 | .br | |
| 14 | .B #include <netinet/in.h> | |
| 15 | .SH DESCRIPTION | |
| 16 | .de _d | |
| 17 | .if t .ta .6i 2.1i 2.6i | |
| 18 | .\" 2.94 went to 2.6, 3.64 to 3.30 | |
| 19 | .if n .ta .84i 2.6i 3.30i | |
| 20 | .. | |
| 21 | .de _f | |
| 22 | .if t .ta .5i 1.25i 2.5i | |
| 23 | .\" 3.5i went to 3.8i | |
| 24 | .if n .ta .7i 1.75i 3.8i | |
| 25 | .. | |
| 26 | The Internet protocol family is a collection of protocols | |
| 27 | layered atop the | |
| 28 | .I Internet Protocol | |
| 29 | (IP) transport layer, and utilizing the Internet address format. | |
| 30 | The Internet family provides protocol support for the | |
| 31 | SOCK_STREAM, SOCK_DGRAM, and SOCK_RAW socket types; the | |
| 32 | SOCK_RAW interface provides access to the IP protocol. | |
| 33 | .SH ADDRESSING | |
| 34 | Internet addresses are four byte quantities, stored in | |
| 35 | network standard format (on the VAX these are word and byte | |
| 36 | reversed). The include file | |
| 37 | .RI < netinet/in.h > | |
| 38 | defines this address | |
| 39 | as a discriminated union. | |
| 40 | .PP | |
| 41 | Sockets bound to the Internet protocol family utilize | |
| 42 | the following addressing structure, | |
| 43 | .sp 1 | |
| 44 | .nf | |
| 45 | ._f | |
| 46 | struct sockaddr_in { | |
| 47 | short sin_family; | |
| 48 | u_short sin_port; | |
| 49 | struct in_addr sin_addr; | |
| 50 | char sin_zero[8]; | |
| 51 | }; | |
| 52 | .sp 1 | |
| 53 | .fi | |
| 54 | Sockets may be created with the address INADDR_ANY | |
| 55 | to effect \*(lqwildcard\*(rq matching on incoming messages. | |
| 56 | .SH PROTOCOLS | |
| 57 | The Internet protocol family is comprised of | |
| 58 | the IP transport protocol, Internet Control | |
| 59 | Message Protocol (ICMP), Transmission Control | |
| 60 | Protocol (TCP), and User Datagram Protocol (UDP). | |
| 61 | TCP is used to support the SOCK_STREAM | |
| 62 | abstraction while UDP is used to support the SOCK_DGRAM | |
| 63 | abstraction. A raw interface to IP is available | |
| 64 | by creating an Internet socket of type SOCK_RAW. | |
| 65 | The ICMP message protocol is not directly accessible. | |
| 66 | .SH SEE ALSO | |
| 67 | tcp(4P), udp(4P), ip(4P) | |
| 68 | .SH CAVEAT | |
| 69 | The Internet protocol support is subject to change as | |
| 70 | the Internet protocols develop. Users should not depend | |
| 71 | on details of the current implementation, but rather | |
| 72 | the services exported. |