Manpages - ares_parse_a_reply.3

ares_parse_a_reply - Parse a reply to a DNS query of type A

  #include <ares.h>

  int ares_parse_a_reply(const unsigned char *abuf, int alen,
  struct hostent **host,
  struct ares_addrttl *addrttls, int *naddrttls);

The ares_parse_a_reply function parses the response to a query of type A into a struct hostent and/or an array of struct ares_addrttls. The parameters abuf and alen give the contents of the response. The result is stored in allocated memory and a pointer to it stored into the variable pointed to by host, if host is nonnull. It is the caller’s responsibility to free the resulting host structure using *ares_free_hostent*(3) when it is no longer needed.

If addrttls and naddrttls are both nonnull, then up to naddrttls *struct ares_addrttl records are stored in the array pointed to by addrttls, and then *naddrttls is set to the number of records so stored. Note that the memory for these records is supplied by the caller.

ares_parse_a_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_gethostbyname*(3), *ares_free_hostent*(3)

Greg Hudson, MIT Information Systems
Andrew Selivanov <andrew.selivanov@gmail.com>
Copyright 1998 by the Massachusetts Institute of Technology.