mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/* IPv4-only variant of gethostbyname.
|
|
Copyright (C) 2016-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C 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.
|
|
|
|
The GNU C 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 the GNU C Library; see the file COPYING.LIB. If
|
|
not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <rpc/rpc.h>
|
|
#include <scratch_buffer.h>
|
|
#include <string.h>
|
|
|
|
int
|
|
__libc_rpc_gethostbyname (const char *host, struct sockaddr_in *addr)
|
|
{
|
|
struct hostent hostbuf;
|
|
struct hostent *hp = NULL;
|
|
int herr;
|
|
struct scratch_buffer tmpbuf;
|
|
scratch_buffer_init (&tmpbuf);
|
|
|
|
while (__gethostbyname2_r (host, AF_INET,
|
|
&hostbuf, tmpbuf.data, tmpbuf.length, &hp,
|
|
&herr) != 0
|
|
|| hp == NULL)
|
|
if (herr != NETDB_INTERNAL || errno != ERANGE)
|
|
{
|
|
struct rpc_createerr *ce = &get_rpc_createerr ();
|
|
ce->cf_stat = RPC_UNKNOWNHOST;
|
|
scratch_buffer_free (&tmpbuf);
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
if (!scratch_buffer_grow (&tmpbuf))
|
|
{
|
|
/* If memory allocation failed, allocating the RPC error
|
|
structure might could as well, so this could lead to a
|
|
crash. */
|
|
struct rpc_createerr *ce = &get_rpc_createerr ();
|
|
ce->cf_stat = RPC_SYSTEMERROR;
|
|
ce->cf_error.re_errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (hp->h_addrtype != AF_INET || hp->h_length != sizeof (addr->sin_addr))
|
|
{
|
|
struct rpc_createerr *ce = &get_rpc_createerr ();
|
|
ce->cf_stat = RPC_SYSTEMERROR;
|
|
ce->cf_error.re_errno = EAFNOSUPPORT;
|
|
scratch_buffer_free (&tmpbuf);
|
|
return -1;
|
|
}
|
|
|
|
addr->sin_family = AF_INET;
|
|
addr->sin_port = htons (0);
|
|
memcpy (&addr->sin_addr, hp->h_addr, sizeof (addr->sin_addr));
|
|
scratch_buffer_free (&tmpbuf);
|
|
return 0;
|
|
}
|