ares_parse_ptr_reply - Man Page

#include <ares.h>

int ares_parse_ptr_reply(const unsigned char *abuf, int alen,
                         const void *addr, int addrlen,
                         int family, struct hostent **host);

The ares_parse_ptr_reply function parses the response to a query of type PTR into a struct hostent. The parameters abuf and alen give the contents of the response.  The parameters addr, addrlen, and family specify which address was queried for; they are not used to verify the response, merely used to fill in the address of the struct hostent. The resulting struct hostent is stored in allocated memory and a pointer to it stored into the variable pointed to by host. It is the caller's responsibility to free the resulting host structure using ares_free_hostent(3) when it is no longer needed.

ares_parse_ptr_reply can return any of the following values:

ARES_SUCCESS

The response was successfully parsed.

ARES_EBADRESP

The response was malformatted.

ARES_ENODATA

The response did not contain an answer to the query.

ARES_ENOMEM

Memory was exhausted.

ares_gethostbyaddr(3), ares_free_hostent(3)

ares_free_hostent(3).