NAME¶
ares_parse_a_reply - Parse a reply to a DNS query of type A
SYNOPSIS¶
#include <ares.h>
int ares_parse_a_reply(const unsigned char *abuf, int alen,
struct hostent **host,
struct ares_addrttl *addrttls, int *naddrttls);
DESCRIPTION¶
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.
RETURN VALUES¶
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.
SEE ALSO¶
ares_gethostbyname(3),
ares_free_hostent(3)
AUTHOR¶
Greg Hudson, MIT Information Systems
Copyright 1998 by the Massachusetts Institute of Technology.