ARES_EXPAND_NAME
Section: C Library Functions (3)
Updated: 20 Nov 2009
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NAME
ares_expand_string - Expand a length encoded string
SYNOPSIS
#include <ares.h>
int ares_expand_string(const unsigned char *encoded,
const unsigned char *abuf, int alen, unsigned char **s,
long *enclen)
DESCRIPTION
The
ares_expand_string
function converts a length encoded string to a NUL-terminated C
string. The argument
encoded
gives the beginning of the encoded string, and the arguments
abuf
and
alen
give the containing message buffer (necessary for the processing of
indirection pointers within the encoded domain name). The result is
placed in a NUL-terminated allocated buffer, a pointer to which is
stored in the variable pointed to by
s.
The length of the encoded string is stored in the variable pointed to by
enclen
so that the caller can advance past the encoded string to read
further data in the message.
RETURN VALUES
ares_expand_string
can return any of the following values:
- ARES_SUCCESS
-
Expansion of the encoded string succeeded.
- ARES_EBADSTR
-
The encoded string was malformed and could not be expanded.
- ARES_ENOMEM
-
Memory was exhausted.
SEE ALSO
ares_free_string(3)
AUTHOR
Dominick Meglio