1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1995, 1996
5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #include "ypxfrd.h"
37
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <unistd.h>
41 #include <string.h>
42 #include <errno.h>
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/uio.h>
46 #include <sys/fcntl.h>
47 #include <machine/endian.h>
48 #include "ypxfrd_extern.h"
49
50 int forked = 0;
51 int children = 0;
52 int fp = 0;
53
54 static bool_t
xdr_my_xfr(register XDR * xdrs,xfr * objp)55 xdr_my_xfr(register XDR *xdrs, xfr *objp)
56 {
57 unsigned char buf[XFRBLOCKSIZE];
58
59 while (1) {
60 if ((objp->xfr_u.xfrblock_buf.xfrblock_buf_len =
61 read(fp, &buf, XFRBLOCKSIZE)) != -1) {
62 objp->ok = TRUE;
63 objp->xfr_u.xfrblock_buf.xfrblock_buf_val = (char *)&buf;
64 } else {
65 objp->ok = FALSE;
66 objp->xfr_u.xfrstat = XFR_READ_ERR;
67 yp_error("read error: %s", strerror(errno));
68 }
69
70 /* Serialize */
71 if (!xdr_xfr(xdrs, objp))
72 return(FALSE);
73 if (objp->ok == FALSE)
74 return(TRUE);
75 if (objp->xfr_u.xfrblock_buf.xfrblock_buf_len < XFRBLOCKSIZE) {
76 objp->ok = FALSE;
77 objp->xfr_u.xfrstat = XFR_DONE;
78 if (!xdr_xfr(xdrs, objp))
79 return(FALSE);
80 return(TRUE);
81 }
82 }
83 }
84
85 struct xfr *
ypxfrd_getmap_1_svc(ypxfr_mapname * argp,struct svc_req * rqstp)86 ypxfrd_getmap_1_svc(ypxfr_mapname *argp, struct svc_req *rqstp)
87 {
88 static struct xfr result;
89 char buf[MAXPATHLEN];
90
91 result.ok = FALSE;
92 result.xfr_u.xfrstat = XFR_DENIED;
93
94 if (yp_validdomain(argp->xfrdomain)) {
95 return(&result);
96 }
97
98 if (yp_access(argp->xfrmap, (struct svc_req *)rqstp)) {
99 return(&result);
100 }
101
102 snprintf (buf, sizeof(buf), "%s/%s/%s", yp_dir, argp->xfrdomain,
103 argp->xfrmap);
104 if (access(buf, R_OK) == -1) {
105 result.xfr_u.xfrstat = XFR_ACCESS;
106 return(&result);
107 }
108
109 if (argp->xfr_db_type != XFR_DB_BSD_HASH &&
110 argp->xfr_db_type != XFR_DB_ANY) {
111 result.xfr_u.xfrstat = XFR_DB_TYPE_MISMATCH;
112 return(&result);
113 }
114
115 #if BYTE_ORDER == LITTLE_ENDIAN
116 if (argp->xfr_byte_order == XFR_ENDIAN_BIG) {
117 #else
118 if (argp->xfr_byte_order == XFR_ENDIAN_LITTLE) {
119 #endif
120 result.xfr_u.xfrstat = XFR_DB_ENDIAN_MISMATCH;
121 return(&result);
122 }
123
124 #ifndef DEBUG
125 if (children < MAX_CHILDREN && fork()) {
126 children++;
127 forked = 0;
128 return (NULL);
129 } else {
130 forked++;
131 }
132 #endif
133 if ((fp = open(buf, O_RDONLY)) == -1) {
134 result.xfr_u.xfrstat = XFR_READ_ERR;
135 return(&result);
136 }
137
138 /* Start sending the file. */
139
140 svc_sendreply(rqstp->rq_xprt, (xdrproc_t)xdr_my_xfr, &result);
141
142 close(fp);
143
144 return (NULL);
145 }
146