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res_send(3) Library Functions Manual res_send(3) 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 mes- sage. 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 infor- mation that is used by the resolver functions is kept in the _res data structure. The /include/resolv.h file contains the _res data struc- ture 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), _get- long(3), _getshort(3), putlong(3), putshort(3), res_init(3), res_mk- query(3) delim off res_send(3)