inet man page on CentOS

Man page or keyword search:  
man Server   8420 pages
apropos Keyword Search (all sections)
Output format
CentOS logo
[printable version]

INET(3)			   Linux Programmer's Manual		       INET(3)

NAME
       inet_aton,    inet_addr,	   inet_network,   inet_ntoa,	inet_makeaddr,
       inet_lnaof, inet_netof - Internet address manipulation routines

SYNOPSIS
       #include <sys/socket.h>
       #include <netinet/in.h>
       #include <arpa/inet.h>

       int inet_aton(const char *cp, struct in_addr *inp);

       in_addr_t inet_addr(const char *cp);

       in_addr_t inet_network(const char *cp);

       char *inet_ntoa(struct in_addr in);

       struct in_addr inet_makeaddr(int net, int host);

       in_addr_t inet_lnaof(struct in_addr in);

       in_addr_t inet_netof(struct in_addr in);

DESCRIPTION
       inet_aton() converts the Internet host address  cp  from	 the  standard
       numbers-and-dots	 notation into binary data and stores it in the struc‐
       ture that inp points to. inet_aton() returns non-zero if the address is
       valid, zero if not.

       The  inet_addr()	 function  converts  the Internet host address cp from
       numbers-and-dots notation into binary data in network byte  order.   If
       the input is invalid, INADDR_NONE (usually -1) is returned.  This is an
       obsolete interface to inet_aton(), described immediately above;	it  is
       obsolete	  because   -1	is  a  valid  address  (255.255.255.255),  and
       inet_aton() provides a cleaner way to indicate error return.

       The inet_network() function extracts a number suitable for  use	as  an
       Internet address in host byte order from the address cp in numbers-and-
       dots notation.  If the input is invalid, -1 is returned.

       The inet_ntoa() function converts the Internet host address in given in
       network	byte  order to a string in standard numbers-and-dots notation.
       The string is returned in a statically allocated buffer,	 which	subse‐
       quent calls will overwrite.

       The  inet_makeaddr() function makes an Internet host address in network
       byte order by combining the network number net with the	local  address
       host in network net, both in local host byte order.

       The  inet_lnaof()  function  returns the local host address part of the
       Internet address in.  The local host address is returned in local  host
       byte order.

       The inet_netof() function returns the network number part of the Inter‐
       net Address in.	The network number is  returned	 in  local  host  byte
       order.

       The   structure	 in_addr  as  used  in	inet_ntoa(),  inet_makeaddr(),
       inet_lnoaf() and inet_netof() is defined in netinet/in.h as:

	      struct in_addr {
		      unsigned long int s_addr;
	      }

       Note that on the i80x86 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).

NOTE
       When you using numbers-and-dots notation for addresses, be  aware  that
       each  number  will  be  interpreted  as octal if preceded by a 0 and as
       hexadecimal     if     preceded	   by	   0x.	     For      example,
       inet_aton("226.000.000.037",   &t)   will   interpret  the  address  as
       226.0.0.31 and not 226.0.0.37.

GLIBC NOTES
       In order to expose the declaration of inet_aton(), one of  the  feature
       test macros _BSD_SOURCE, _SVID_SOURCE, or _GNU_SOURCE must be defined.

CONFORMING TO
       4.3BSD.	 inet_addr(),  inet_aton(),  and  inet_ntoa() are specified in
       POSIX.1-2001.

SEE ALSO
       gethostbyname(3), getnetent(3), inet_ntop(3),  inet_pton(3),  hosts(5),
       networks(5)

BSD				  2001-07-25			       INET(3)
[top]

List of man pages available for CentOS

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net