OSF

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

msg_ptrPoints to the beginning of a message. 

msg_lenSpecifies the length of the message. 

answerPoints to an address where the response is stored. 

ans_lenSpecifies 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

/etc/resolv.conf
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)