Content-type: text/html Man page of res_send

res_send

Section: C Library Functions (3)
Index Return to Main Contents
 

NAME

res_send - Sends a query to a name server and retrieves a response  

LIBRARY

Standard C Library (libc.a)  

SYNOPSIS

#include <sys/types.h>

#include <netinet/in.h>

#include <arpa/nameser.h>

#include <resolv.h>

int res_send (        char *msg_ptr,
       int msg_len,
       char *answer,
       int ans_len );
 

PARAMETERS

Points to the beginning of a message. Specifies the length of the message. Points to an address where the response is stored. Specifies the size of the answer area.  

DESCRIPTION

The res_send() function sends a query toname servers and calls the res_init() function if the RES_INIT option of the _res data structure is not set. This function sends the query to the local name server and handles timeouts and retries.

The res_send() function is one of a set of subroutines that form the resolver, a set of functions that resolve 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 data structure definition.  

RETURN VALUES

Upon successful completion, the res_send() function returns the length of the message. Otherwise, -1 is returned.  

FILES

Contains general name server and domain name information.  

RELATED INFORMATION

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


 

Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
RETURN VALUES
FILES
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:41:13 GMT, October 02, 2010