| /* IPv4-only variant of gethostbyname. |
| Copyright (C) 2016-2018 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 <http://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; |
| } |