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Diffstat (limited to 'man3/inet.3')
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diff --git a/man3/inet.3 b/man3/inet.3 deleted file mode 100644 index 554fd11..0000000 --- a/man3/inet.3 +++ /dev/null @@ -1,336 +0,0 @@ -'\" t -.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) -.\" and Copyright (c) 2008 Linux Foundation, written by Michael Kerrisk -.\" <mtk.manpages@gmail.com> -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.\" References consulted: -.\" Linux libc source code -.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) -.\" 386BSD man pages -.\" libc.info (from glibc distribution) -.\" Modified Sat Jul 24 19:12:00 1993 by Rik Faith <faith@cs.unc.edu> -.\" Modified Sun Sep 3 20:29:36 1995 by Jim Van Zandt <jrv@vanzandt.mv.com> -.\" Changed network into host byte order (for inet_network), -.\" Andreas Jaeger <aj@arthur.rhein-neckar.de>, 980130. -.\" 2008-06-19, mtk -.\" Describe the various address forms supported by inet_aton(). -.\" Clarify discussion of inet_lnaof(), inet_netof(), and inet_makeaddr(). -.\" Add discussion of Classful Addressing, noting that it is obsolete. -.\" Added an EXAMPLE program. -.\" -.TH inet 3 2023-10-31 "Linux man-pages 6.7" -.SH NAME -inet_aton, inet_addr, inet_network, inet_ntoa, inet_makeaddr, inet_lnaof, -inet_netof \- Internet address manipulation routines -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.B #include <sys/socket.h> -.B #include <netinet/in.h> -.B #include <arpa/inet.h> -.P -.BI "int inet_aton(const char *" cp ", struct in_addr *" inp ); -.P -.BI "in_addr_t inet_addr(const char *" cp ); -.BI "in_addr_t inet_network(const char *" cp ); -.P -.BI "[[deprecated]] char *inet_ntoa(struct in_addr " in ); -.P -.BI "[[deprecated]] struct in_addr inet_makeaddr(in_addr_t " net , -.BI " in_addr_t " host ); -.P -.BI "[[deprecated]] in_addr_t inet_lnaof(struct in_addr " in ); -.BI "[[deprecated]] in_addr_t inet_netof(struct in_addr " in ); -.fi -.P -.RS -4 -Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): -.RE -.P -.BR inet_aton (), -.BR inet_ntoa (): -.nf - Since glibc 2.19: - _DEFAULT_SOURCE - In glibc up to and including 2.19: - _BSD_SOURCE || _BSD_SOURCE -.fi -.SH DESCRIPTION -.BR inet_aton () -converts the Internet host address \fIcp\fP from the -IPv4 numbers-and-dots notation into binary form (in network byte order) -and stores it in the structure that \fIinp\fP points to. -.BR inet_aton () -returns nonzero if the address is valid, zero if not. -The address supplied in -.I cp -can have one of the following forms: -.TP 10 -.I a.b.c.d -Each of the four numeric parts specifies a byte of the address; -the bytes are assigned in left-to-right order to produce the binary address. -.TP -.I a.b.c -Parts -.I a -and -.I b -specify the first two bytes of the binary address. -Part -.I c -is interpreted as a 16-bit value that defines the rightmost two bytes -of the binary address. -This notation is suitable for specifying (outmoded) Class B -network addresses. -.TP -.I a.b -Part -.I a -specifies the first byte of the binary address. -Part -.I b -is interpreted as a 24-bit value that defines the rightmost three bytes -of the binary address. -This notation is suitable for specifying (outmoded) Class A -network addresses. -.TP -.I a -The value -.I a -is interpreted as a 32-bit value that is stored directly -into the binary address without any byte rearrangement. -.P -In all of the above forms, -components of the dotted address can be specified in decimal, -octal (with a leading -.IR 0 ), -or hexadecimal, with a leading -.IR 0X ). -Addresses in any of these forms are collectively termed -.IR "IPV4 numbers-and-dots notation" . -The form that uses exactly four decimal numbers is referred to as -.I IPv4 dotted-decimal notation -(or sometimes: -.IR "IPv4 dotted-quad notation" ). -.P -.BR inet_aton () -returns 1 if the supplied string was successfully interpreted, -or 0 if the string is invalid -.RB ( errno -is -.I not -set on error). -.P -The -.BR inet_addr () -function converts the Internet host address -\fIcp\fP from IPv4 numbers-and-dots notation into binary data in network -byte order. -If the input is invalid, -.B INADDR_NONE -(usually \-1) is returned. -Use of this function is problematic because \-1 is a valid address -(255.255.255.255). -Avoid its use in favor of -.BR inet_aton (), -.BR inet_pton (3), -or -.BR getaddrinfo (3), -which provide a cleaner way to indicate error return. -.P -The -.BR inet_network () -function converts -.IR cp , -a string in IPv4 numbers-and-dots notation, -into a number in host byte order suitable for use as an -Internet network address. -On success, the converted address is returned. -If the input is invalid, \-1 is returned. -.P -The -.BR inet_ntoa () -function converts the Internet host address -\fIin\fP, given in network byte order, to a string in IPv4 -dotted-decimal notation. -The string is returned in a statically -allocated buffer, which subsequent calls will overwrite. -.P -The -.BR inet_lnaof () -function returns the local network address part -of the Internet address \fIin\fP. -The returned value is in host byte order. -.P -The -.BR inet_netof () -function returns the network number part of -the Internet address \fIin\fP. -The returned value is in host byte order. -.P -The -.BR inet_makeaddr () -function is the converse of -.BR inet_netof () -and -.BR inet_lnaof (). -It returns an Internet host address in network byte order, -created by combining the network number \fInet\fP -with the local address \fIhost\fP, both in -host byte order. -.P -The structure \fIin_addr\fP as used in -.BR inet_ntoa (), -.BR inet_makeaddr (), -.BR inet_lnaof (), -and -.BR inet_netof () -is defined in -.I <netinet/in.h> -as: -.P -.in +4n -.EX -typedef uint32_t in_addr_t; -\& -struct in_addr { - in_addr_t s_addr; -}; -.EE -.in -.SH ATTRIBUTES -For an explanation of the terms used in this section, see -.BR attributes (7). -.TS -allbox; -lbx lb lb -l l l. -Interface Attribute Value -T{ -.na -.nh -.BR inet_aton (), -.BR inet_addr (), -.BR inet_network (), -.BR inet_ntoa () -T} Thread safety MT-Safe locale -T{ -.na -.nh -.BR inet_makeaddr (), -.BR inet_lnaof (), -.BR inet_netof () -T} Thread safety MT-Safe -.TE -.SH STANDARDS -.TP -.BR inet_addr () -.TQ -.BR inet_ntoa () -POSIX.1-2008. -.TP -.BR inet_aton () -None. -.SH STANDARDS -.TP -.BR inet_addr () -.TQ -.BR inet_ntoa () -POSIX.1-2001, 4.3BSD. -.P -.BR inet_lnaof (), -.BR inet_netof (), -and -.BR inet_makeaddr () -are legacy functions that assume they are dealing with -.IR "classful network addresses" . -Classful networking divides IPv4 network addresses into host and network -components at byte boundaries, as follows: -.TP 10 -Class A -This address type is indicated by the value 0 in the -most significant bit of the (network byte ordered) address. -The network address is contained in the most significant byte, -and the host address occupies the remaining three bytes. -.TP -Class B -This address type is indicated by the binary value 10 in the -most significant two bits of the address. -The network address is contained in the two most significant bytes, -and the host address occupies the remaining two bytes. -.TP -Class C -This address type is indicated by the binary value 110 in the -most significant three bits of the address. -The network address is contained in the three most significant bytes, -and the host address occupies the remaining byte. -.P -Classful network addresses are now obsolete, -having been superseded by Classless Inter-Domain Routing (CIDR), -which divides addresses into network and host components at -arbitrary bit (rather than byte) boundaries. -.SH NOTES -On x86 architectures, the host byte order is Least Significant Byte -first (little endian), whereas the network byte order, as used on the -Internet, is Most Significant Byte first (big endian). -.SH EXAMPLES -An example of the use of -.BR inet_aton () -and -.BR inet_ntoa () -is shown below. -Here are some example runs: -.P -.in +4n -.EX -.RB "$" " ./a.out 226.000.000.037" " # Last byte is in octal" -226.0.0.31 -.RB "$" " ./a.out 0x7f.1 " " # First byte is in hex" -127.0.0.1 -.EE -.in -.SS Program source -\& -.\" SRC BEGIN (inet.c) -.EX -#define _DEFAULT_SOURCE -#include <arpa/inet.h> -#include <stdio.h> -#include <stdlib.h> -\& -int -main(int argc, char *argv[]) -{ - struct in_addr addr; -\& - if (argc != 2) { - fprintf(stderr, "%s <dotted\-address>\en", argv[0]); - exit(EXIT_FAILURE); - } -\& - if (inet_aton(argv[1], &addr) == 0) { - fprintf(stderr, "Invalid address\en"); - exit(EXIT_FAILURE); - } -\& - printf("%s\en", inet_ntoa(addr)); - exit(EXIT_SUCCESS); -} -.EE -.\" SRC END -.SH SEE ALSO -.BR byteorder (3), -.BR getaddrinfo (3), -.BR gethostbyname (3), -.BR getnameinfo (3), -.BR getnetent (3), -.BR inet_net_pton (3), -.BR inet_ntop (3), -.BR inet_pton (3), -.BR hosts (5), -.BR networks (5) |