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