yp_svc_udp.c revision 21673 
1/*
2 * Copyright (c) 1996
3 *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	$FreeBSD: head/usr.sbin/ypserv/yp_svc_udp.c 21673 1997-01-14 07:20:47Z jkh $
33 */
34
35#include <rpc/rpc.h>
36#include "yp_extern.h"
37
38#ifndef lint
39static const char rcsid[] = "$FreeBSD: head/usr.sbin/ypserv/yp_svc_udp.c 21673 1997-01-14 07:20:47Z jkh $";
40#endif
41
42/*
43 * XXX Must not diverge from what's in src/lib/libc/rpc/svc_udp.c
44 */
45
46/*
47 * kept in xprt->xp_p2
48 */
49struct svcudp_data {
50	u_int   su_iosz;	/* byte size of send.recv buffer */
51	u_long	su_xid;		/* transaction id */
52	XDR	su_xdrs;	/* XDR handle */
53	char	su_verfbody[MAX_AUTH_BYTES];	/* verifier body */
54	char * 	su_cache;	/* cached data, NULL if no cache */
55};
56#define	su_data(xprt)	((struct svcudp_data *)(xprt->xp_p2))
57
58/*
59 * We need to be able to manually set the transaction ID in the
60 * UDP transport handle, but the standard library offers us no way
61 * to do that. Hence we need this garbage.
62 */
63
64unsigned long
65svcudp_get_xid(xprt)
66	SVCXPRT *xprt;
67{
68	struct svcudp_data *su;
69
70	if (xprt == NULL)
71		return(0);
72	su = su_data(xprt);
73	return(su->su_xid);
74}
75
76unsigned long
77svcudp_set_xid(xprt, xid)
78	SVCXPRT *xprt;
79	unsigned long xid;
80{
81	struct svcudp_data *su;
82	unsigned long old_xid;
83
84	if (xprt == NULL)
85		return(0);
86	su = su_data(xprt);
87	old_xid = su->su_xid;
88	su->su_xid = xid;
89	return(old_xid);
90}
91