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/*
* This file is a ghastly hack because nobody can agree on
* gethostbyname_r()'s prototype.
*
* Copyright (C) 2001,2002 Brian Stafford <brian@stafford.uklinux.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _SVID_SOURCE 1 /* Need this to get gethostbyname_r() */
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <errno.h>
#include "gethostbyname.h"
#if HAVE_GETIPNODEBYNAME
void
free_ghbnctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
if (ctx->hostent != NULL)
freehostent (ctx->hostent);
}
struct hostent *
gethostbyname_ctx (const char *host, struct ghbnctx *ctx)
{
assert (ctx != NULL);
memset (ctx, 0, sizeof (struct ghbnctx));
ctx->hostent = getipnodebyname (host, AF_UNSPEC, AI_ADDRCONFIG, &ctx->h_err);
return ctx->hostent;
}
int
h_error_ctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
return ctx->h_err;
}
#elif HAVE_GETHOSTBYNAME_R == 6
void
free_ghbnctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
if (ctx->hostbuf != NULL)
free (ctx->hostbuf);
}
struct hostent *
gethostbyname_ctx (const char *host, struct ghbnctx *ctx)
{
struct hostent *hp;
char *tmp;
int err;
assert (ctx != NULL);
memset (ctx, 0, sizeof (struct ghbnctx));
ctx->hostbuf_len = 2048;
if ((ctx->hostbuf = malloc (ctx->hostbuf_len)) == NULL)
{
errno = ENOMEM;
return NULL;
}
while ((err = gethostbyname_r (host,
&ctx->hostent, ctx->hostbuf, ctx->hostbuf_len,
&hp, &ctx->h_err)) == ERANGE)
{
ctx->hostbuf_len += 1024;
if ((tmp = realloc (ctx->hostbuf, ctx->hostbuf_len)) == NULL)
{
errno = ENOMEM;
return NULL;
}
ctx->hostbuf = tmp;
}
if (err != 0)
{
errno = err;
return NULL;
}
return hp;
}
int
h_error_ctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
return ctx->h_err;
}
#elif HAVE_GETHOSTBYNAME_R == 5
void
free_ghbnctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
if (ctx->hostbuf != NULL)
free (ctx->hostbuf);
}
struct hostent *
gethostbyname_ctx (const char *host, struct ghbnctx *ctx)
{
struct hostent *hp;
char *tmp;
assert (ctx != NULL);
memset (ctx, 0, sizeof (struct ghbnctx));
ctx->hostbuf_len = 2048;
if ((ctx->hostbuf = malloc (ctx->hostbuf_len)) == NULL)
{
errno = ENOMEM;
return NULL;
}
while ((hp = gethostbyname_r (host, &ctx->hostent,
ctx->hostbuf, ctx->hostbuf_len,
&ctx->h_err)) == NULL && errno == ERANGE)
{
ctx->hostbuf_len += 1024;
if ((tmp = realloc (ctx->hostbuf, ctx->hostbuf_len)) == NULL)
{
errno = ENOMEM;
return NULL;
}
ctx->hostbuf = tmp;
}
return hp;
}
int
h_error_ctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
return ctx->h_err;
}
#elif HAVE_GETHOSTBYNAME_R == 3
void
free_ghbnctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
/* FIXME: does this need to do anything? */
}
struct hostent *
gethostbyname_ctx (const char *host, struct ghbnctx *ctx)
{
assert (ctx != NULL);
if (!gethostbyname_r (host, &ctx->hostent, &ctx->hostent_data))
{
ctx->h_err = h_errno; /* FIXME: is this correct? */
return NULL;
}
return &ctx->hostent;
}
int
h_error_ctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
return ctx->h_err;
}
#else
void
free_ghbnctx (struct ghbnctx *ctx __attribute__ ((unused)))
{
assert (ctx != NULL);
}
struct hostent *
gethostbyname_ctx (const char *host, struct ghbnctx *ctx)
{
struct hostent *hp;
hp = gethostbyname (host);
if (hp == NULL)
ctx->h_err = h_errno;
return hp;
}
int
h_error_ctx (struct ghbnctx *ctx)
{
assert (ctx != NULL);
return ctx->h_err;
}
#endif
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