122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/* $OpenBSD: yp_bind.c,v 1.33 2024/01/22 16:18:06 deraadt Exp $ */
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/*
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* Copyright (c) 1992, 1993, 1996 Theo de Raadt <deraadt@theos.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include <paths.h>
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#include <rpc/rpc.h>
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#include <rpc/xdr.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include "ypinternal.h"
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char _yp_domain[HOST_NAME_MAX+1];
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int _yplib_timeout = 10;
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extern CLIENT *
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clntudp_bufcreate_simple(struct sockaddr_in *raddr, u_long program, u_long version,
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struct timeval wait, int *sockp, u_int sendsz, u_int recvsz);
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int
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_yp_dobind(const char *dom, struct dom_binding **ypdb)
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{
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struct dom_binding *ypbinding;
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struct timeval tv;
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int connected = 1;
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int s;
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if (dom == NULL || strlen(dom) == 0)
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return YPERR_BADARGS;
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ypbinding = calloc(1, sizeof (*ypbinding));
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if (ypbinding == NULL)
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return YPERR_RESRC;
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again:
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s = ypconnect(SOCK_DGRAM);
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if (s == -1) {
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free(ypbinding);
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return YPERR_YPBIND; /* YP not running */
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}
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ypbinding->dom_socket = s;
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ypbinding->dom_server_addr.sin_port = -1; /* don't consult portmap */
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tv.tv_sec = _yplib_timeout / 2;
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tv.tv_usec = 0;
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ypbinding->dom_client = clntudp_bufcreate_simple(&ypbinding->dom_server_addr,
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YPPROG, YPVERS, tv, &ypbinding->dom_socket, UDPMSGSIZE, UDPMSGSIZE);
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if (ypbinding->dom_client == NULL) {
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close(ypbinding->dom_socket);
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ypbinding->dom_socket = -1;
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clnt_pcreateerror("clntudp_create");
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goto again;
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}
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clnt_control(ypbinding->dom_client, CLSET_CONNECTED, &connected);
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*ypdb = ypbinding;
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return 0;
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}
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void
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_yp_unbind(struct dom_binding *ypb)
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{
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close(ypb->dom_socket);
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if (ypb->dom_client)
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clnt_destroy(ypb->dom_client);
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free(ypb);
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}
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/*
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* Check if YP is running. But do not leave it active, because we
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* may not return from libc with a fd active.
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*/
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int
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yp_bind(const char *dom)
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{
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struct dom_binding *ysd;
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int r;
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r = _yp_dobind(dom, &ysd);
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if (r == 0)
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_yp_unbind(ysd);
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return r;
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}
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DEF_WEAK(yp_bind);
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void
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yp_unbind(const char *dom)
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{
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/* do nothing */
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}
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