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 */ 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <stdio.h> 43 #include <rpc/rpc.h> 44 #include <rpc/rpcb_prot.h> 45 #include <rpc/xdr.h> 46 #ifdef PORTMAP 47 #include <netinet/in.h> 48 #include <rpc/pmap_prot.h> 49 #endif 50 #include <syslog.h> 51 #include <unistd.h> 52 53 #include "rpcbind.h" 54 55 /* 56 * XXX this code is unsafe and is not used. It should be made safe. 57 */ 58 59 60 /* These files keep the pmap_list and rpcb_list in XDR format */ 61 #define RPCBFILE "/tmp/rpcbind.file" 62 #ifdef PORTMAP 63 #define PMAPFILE "/tmp/portmap.file" 64 #endif 65 66 static bool_t write_struct(char *, xdrproc_t, void *); 67 static bool_t read_struct(char *, xdrproc_t, void *); 68 69 static bool_t 70 write_struct(char *filename, xdrproc_t structproc, void *list) 71 { 72 FILE *fp; 73 XDR xdrs; 74 mode_t omask; 75 76 omask = umask(077); 77 fp = fopen(filename, "w"); 78 if (fp == NULL) { 79 int i; 80 81 for (i = 0; i < 10; i++) 82 close(i); 83 fp = fopen(filename, "w"); 84 if (fp == NULL) { 85 syslog(LOG_ERR, 86 "cannot open file = %s for writing", filename); 87 syslog(LOG_ERR, "cannot save any registration"); 88 return (FALSE); 89 } 90 } 91 (void) umask(omask); 92 xdrstdio_create(&xdrs, fp, XDR_ENCODE); 93 94 if (structproc(&xdrs, list) == FALSE) { 95 syslog(LOG_ERR, "rpcbind: xdr_%s: failed", filename); 96 fclose(fp); 97 return (FALSE); 98 } 99 XDR_DESTROY(&xdrs); 100 fclose(fp); 101 return (TRUE); 102 } 103 104 static bool_t 105 read_struct(char *filename, xdrproc_t structproc, void *list) 106 { 107 FILE *fp; 108 XDR xdrs; 109 struct stat sbuf; 110 111 if (stat(filename, &sbuf) != 0) { 112 fprintf(stderr, 113 "rpcbind: cannot stat file = %s for reading\n", filename); 114 goto error; 115 } 116 if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) || 117 (sbuf.st_mode & S_IRWXO)) { 118 fprintf(stderr, 119 "rpcbind: invalid permissions on file = %s for reading\n", 120 filename); 121 goto error; 122 } 123 fp = fopen(filename, "r"); 124 if (fp == NULL) { 125 fprintf(stderr, 126 "rpcbind: cannot open file = %s for reading\n", filename); 127 goto error; 128 } 129 xdrstdio_create(&xdrs, fp, XDR_DECODE); 130 131 if (structproc(&xdrs, list) == FALSE) { 132 fprintf(stderr, "rpcbind: xdr_%s: failed\n", filename); 133 fclose(fp); 134 goto error; 135 } 136 XDR_DESTROY(&xdrs); 137 fclose(fp); 138 return (TRUE); 139 140 error: fprintf(stderr, "rpcbind: will start from scratch\n"); 141 return (FALSE); 142 } 143 144 void 145 write_warmstart(void) 146 { 147 (void) write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl); 148 #ifdef PORTMAP 149 (void) write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml); 150 #endif 151 152 } 153 154 void 155 read_warmstart(void) 156 { 157 rpcblist_ptr tmp_rpcbl = NULL; 158 #ifdef PORTMAP 159 struct pmaplist *tmp_pmapl = NULL; 160 #endif 161 int ok1, ok2 = TRUE; 162 163 ok1 = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl); 164 if (ok1 == FALSE) 165 return; 166 #ifdef PORTMAP 167 ok2 = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl); 168 #endif 169 if (ok2 == FALSE) { 170 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl); 171 return; 172 } 173 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl); 174 list_rbl = tmp_rpcbl; 175 #ifdef PORTMAP 176 xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml); 177 list_pml = tmp_pmapl; 178 #endif 179 } 180