1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * 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 are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 /* 31 * warmstart.c 32 * Allows for gathering of registrations from an earlier dumped file. 33 * 34 * Copyright (c) 1990 by Sun Microsystems, Inc. 35 */ 36 37 /* 38 * #ident "@(#)warmstart.c 1.7 93/07/05 SMI" 39 * $FreeBSD$/ 40 */ 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <stdio.h> 44 #include <rpc/rpc.h> 45 #include <rpc/rpcb_prot.h> 46 #include <rpc/xdr.h> 47 #ifdef PORTMAP 48 #include <netinet/in.h> 49 #include <rpc/pmap_prot.h> 50 #endif 51 #include <syslog.h> 52 #include <unistd.h> 53 54 #include "rpcbind.h" 55 56 /* 57 * XXX this code is unsafe and is not used. It should be made safe. 58 */ 59 60 61 /* These files keep the pmap_list and rpcb_list in XDR format */ 62 #define RPCBFILE "/tmp/rpcbind.file" 63 #ifdef PORTMAP 64 #define PMAPFILE "/tmp/portmap.file" 65 #endif 66 67 static bool_t write_struct(char *, xdrproc_t, void *); 68 static bool_t read_struct(char *, xdrproc_t, void *); 69 70 static bool_t 71 write_struct(char *filename, xdrproc_t structproc, void *list) 72 { 73 FILE *fp; 74 XDR xdrs; 75 mode_t omask; 76 77 omask = umask(077); 78 fp = fopen(filename, "w"); 79 if (fp == NULL) { 80 int i; 81 82 for (i = 0; i < 10; i++) 83 close(i); 84 fp = fopen(filename, "w"); 85 if (fp == NULL) { 86 syslog(LOG_ERR, 87 "cannot open file = %s for writing", filename); 88 syslog(LOG_ERR, "cannot save any registration"); 89 return (FALSE); 90 } 91 } 92 (void) umask(omask); 93 xdrstdio_create(&xdrs, fp, XDR_ENCODE); 94 95 if (structproc(&xdrs, list) == FALSE) { 96 syslog(LOG_ERR, "rpcbind: xdr_%s: failed", filename); 97 fclose(fp); 98 return (FALSE); 99 } 100 XDR_DESTROY(&xdrs); 101 fclose(fp); 102 return (TRUE); 103 } 104 105 static bool_t 106 read_struct(char *filename, xdrproc_t structproc, void *list) 107 { 108 FILE *fp; 109 XDR xdrs; 110 struct stat sbuf; 111 112 if (stat(filename, &sbuf) != 0) { 113 fprintf(stderr, 114 "rpcbind: cannot stat file = %s for reading\n", filename); 115 goto error; 116 } 117 if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) || 118 (sbuf.st_mode & S_IRWXO)) { 119 fprintf(stderr, 120 "rpcbind: invalid permissions on file = %s for reading\n", 121 filename); 122 goto error; 123 } 124 fp = fopen(filename, "r"); 125 if (fp == NULL) { 126 fprintf(stderr, 127 "rpcbind: cannot open file = %s for reading\n", filename); 128 goto error; 129 } 130 xdrstdio_create(&xdrs, fp, XDR_DECODE); 131 132 if (structproc(&xdrs, list) == FALSE) { 133 fprintf(stderr, "rpcbind: xdr_%s: failed\n", filename); 134 fclose(fp); 135 goto error; 136 } 137 XDR_DESTROY(&xdrs); 138 fclose(fp); 139 return (TRUE); 140 141 error: fprintf(stderr, "rpcbind: will start from scratch\n"); 142 return (FALSE); 143 } 144 145 void 146 write_warmstart(void) 147 { 148 (void) write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl); 149 #ifdef PORTMAP 150 (void) write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml); 151 #endif 152 153 } 154 155 void 156 read_warmstart(void) 157 { 158 rpcblist_ptr tmp_rpcbl = NULL; 159 #ifdef PORTMAP 160 struct pmaplist *tmp_pmapl = NULL; 161 #endif 162 int ok1, ok2 = TRUE; 163 164 ok1 = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl); 165 if (ok1 == FALSE) 166 return; 167 #ifdef PORTMAP 168 ok2 = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl); 169 #endif 170 if (ok2 == FALSE) { 171 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl); 172 return; 173 } 174 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl); 175 list_rbl = tmp_rpcbl; 176 #ifdef PORTMAP 177 xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml); 178 list_pml = tmp_pmapl; 179 #endif 180 } 181