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 __FBSDID("$FreeBSD$"); 37 38 #include "ypxfrd.h" 39 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 #include <string.h> 44 #include <errno.h> 45 #include <sys/types.h> 46 #include <sys/param.h> 47 #include <sys/uio.h> 48 #include <sys/fcntl.h> 49 #include <machine/endian.h> 50 #include "ypxfrd_extern.h" 51 52 int forked = 0; 53 int children = 0; 54 int fp = 0; 55 56 static bool_t 57 xdr_my_xfr(register XDR *xdrs, xfr *objp) 58 { 59 unsigned char buf[XFRBLOCKSIZE]; 60 61 while (1) { 62 if ((objp->xfr_u.xfrblock_buf.xfrblock_buf_len = 63 read(fp, &buf, XFRBLOCKSIZE)) != -1) { 64 objp->ok = TRUE; 65 objp->xfr_u.xfrblock_buf.xfrblock_buf_val = (char *)&buf; 66 } else { 67 objp->ok = FALSE; 68 objp->xfr_u.xfrstat = XFR_READ_ERR; 69 yp_error("read error: %s", strerror(errno)); 70 } 71 72 /* Serialize */ 73 if (!xdr_xfr(xdrs, objp)) 74 return(FALSE); 75 if (objp->ok == FALSE) 76 return(TRUE); 77 if (objp->xfr_u.xfrblock_buf.xfrblock_buf_len < XFRBLOCKSIZE) { 78 objp->ok = FALSE; 79 objp->xfr_u.xfrstat = XFR_DONE; 80 if (!xdr_xfr(xdrs, objp)) 81 return(FALSE); 82 return(TRUE); 83 } 84 } 85 } 86 87 struct xfr * 88 ypxfrd_getmap_1_svc(ypxfr_mapname *argp, struct svc_req *rqstp) 89 { 90 static struct xfr result; 91 char buf[MAXPATHLEN]; 92 93 result.ok = FALSE; 94 result.xfr_u.xfrstat = XFR_DENIED; 95 96 if (yp_validdomain(argp->xfrdomain)) { 97 return(&result); 98 } 99 100 if (yp_access(argp->xfrmap, (struct svc_req *)rqstp)) { 101 return(&result); 102 } 103 104 snprintf (buf, sizeof(buf), "%s/%s/%s", yp_dir, argp->xfrdomain, 105 argp->xfrmap); 106 if (access(buf, R_OK) == -1) { 107 result.xfr_u.xfrstat = XFR_ACCESS; 108 return(&result); 109 } 110 111 if (argp->xfr_db_type != XFR_DB_BSD_HASH && 112 argp->xfr_db_type != XFR_DB_ANY) { 113 result.xfr_u.xfrstat = XFR_DB_TYPE_MISMATCH; 114 return(&result); 115 } 116 117 #if BYTE_ORDER == LITTLE_ENDIAN 118 if (argp->xfr_byte_order == XFR_ENDIAN_BIG) { 119 #else 120 if (argp->xfr_byte_order == XFR_ENDIAN_LITTLE) { 121 #endif 122 result.xfr_u.xfrstat = XFR_DB_ENDIAN_MISMATCH; 123 return(&result); 124 } 125 126 #ifndef DEBUG 127 if (children < MAX_CHILDREN && fork()) { 128 children++; 129 forked = 0; 130 return (NULL); 131 } else { 132 forked++; 133 } 134 #endif 135 if ((fp = open(buf, O_RDONLY)) == -1) { 136 result.xfr_u.xfrstat = XFR_READ_ERR; 137 return(&result); 138 } 139 140 /* Start sending the file. */ 141 142 svc_sendreply(rqstp->rq_xprt, (xdrproc_t)xdr_my_xfr, &result); 143 144 close(fp); 145 146 return (NULL); 147 } 148