Content-type: text/html Man page of dn_expand

dn_expand

Section: C Library Functions (3)
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NAME

dn_expand - Expands a compressed domain name  

LIBRARY

Standard C Library (libc.a)  

SYNOPSIS

#include <sys/types.h>

#include <netinet/in.h>

#include <arpa/nameser.h>

#include <resolv.h>

int dn_expand (
    u_char *message_ptr,
    u_char *end_of_message,
    u_char *compressed_name,
    u_char *expanded_name,
    int length );  

PARAMETERS

Specifies a pointer to the beginning of a message. Points to the end of the original message that contains the compressed domain name. Specifies a pointer to a compressed domain name. Specifies a pointer to a buffer that holds the resulting expanded domain name. Specifies the size of the buffer pointed to by the expanded_name parameter.  

DESCRIPTION

The dn_expand() function expands a compressed domain name to a full domain name, converting the expanded names to uppercase.

The dn_expand() function is one of a set of subroutines that form the resolver, a set of functions that resolves domain names. Global information that is used by the resolver functions is kept in the _res data structure. The /include/resolv.h file contains the _res structure definition.  

RETURN VALUES

Upon successful completion, the dn_expand() function returns the size of the expanded domain name. Otherwise, a value of -1 is returned.  

FILES

Defines name server and domain name constants, structures, and values.  

RELATED INFORMATION

Functions: res_init(3), res_mkquery(3), res_send(3), dn_comp(3), dn_find(3), _getshort(3), _getlong(3), putshort(3), putlong(3), dn_skipname(3) delim off


 

Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
RETURN VALUES
FILES
RELATED INFORMATION

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Time: 02:41:10 GMT, October 02, 2010