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 */ 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <stdio.h> 42 #include <rpc/rpc.h> 43 #include <rpc/rpcb_prot.h> 44 #include <rpc/xdr.h> 45 #ifdef PORTMAP 46 #include <netinet/in.h> 47 #include <rpc/pmap_prot.h> 48 #endif 49 #include <syslog.h> 50 #include <unistd.h> 51 52 #include "rpcbind.h" 53 54 /* 55 * XXX this code is unsafe and is not used. It should be made safe. 56 */ 57 58 59 /* These files keep the pmap_list and rpcb_list in XDR format */ 60 #define RPCBFILE "/tmp/rpcbind.file" 61 #ifdef PORTMAP 62 #define PMAPFILE "/tmp/portmap.file" 63 #endif 64 65 static bool_t write_struct(char *, xdrproc_t, void *); 66 static bool_t read_struct(char *, xdrproc_t, void *); 67 68 static bool_t 69 write_struct(char *filename, xdrproc_t structproc, void *list) 70 { 71 FILE *fp; 72 XDR xdrs; 73 mode_t omask; 74 75 omask = umask(077); 76 fp = fopen(filename, "w"); 77 if (fp == NULL) { 78 int i; 79 80 for (i = 0; i < 10; i++) 81 close(i); 82 fp = fopen(filename, "w"); 83 if (fp == NULL) { 84 syslog(LOG_ERR, 85 "cannot open file = %s for writing", filename); 86 syslog(LOG_ERR, "cannot save any registration"); 87 return (FALSE); 88 } 89 } 90 (void) umask(omask); 91 xdrstdio_create(&xdrs, fp, XDR_ENCODE); 92 93 if (structproc(&xdrs, list) == FALSE) { 94 syslog(LOG_ERR, "rpcbind: xdr_%s: failed", filename); 95 fclose(fp); 96 return (FALSE); 97 } 98 XDR_DESTROY(&xdrs); 99 fclose(fp); 100 return (TRUE); 101 } 102 103 static bool_t 104 read_struct(char *filename, xdrproc_t structproc, void *list) 105 { 106 FILE *fp; 107 XDR xdrs; 108 struct stat sbuf; 109 110 if (stat(filename, &sbuf) != 0) { 111 fprintf(stderr, 112 "rpcbind: cannot stat file = %s for reading\n", filename); 113 goto error; 114 } 115 if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) || 116 (sbuf.st_mode & S_IRWXO)) { 117 fprintf(stderr, 118 "rpcbind: invalid permissions on file = %s for reading\n", 119 filename); 120 goto error; 121 } 122 fp = fopen(filename, "r"); 123 if (fp == NULL) { 124 fprintf(stderr, 125 "rpcbind: cannot open file = %s for reading\n", filename); 126 goto error; 127 } 128 xdrstdio_create(&xdrs, fp, XDR_DECODE); 129 130 if (structproc(&xdrs, list) == FALSE) { 131 fprintf(stderr, "rpcbind: xdr_%s: failed\n", filename); 132 fclose(fp); 133 goto error; 134 } 135 XDR_DESTROY(&xdrs); 136 fclose(fp); 137 return (TRUE); 138 139 error: fprintf(stderr, "rpcbind: will start from scratch\n"); 140 return (FALSE); 141 } 142 143 void 144 write_warmstart(void) 145 { 146 (void) write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl); 147 #ifdef PORTMAP 148 (void) write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml); 149 #endif 150 151 } 152 153 void 154 read_warmstart(void) 155 { 156 rpcblist_ptr tmp_rpcbl = NULL; 157 #ifdef PORTMAP 158 struct pmaplist *tmp_pmapl = NULL; 159 #endif 160 int ok1, ok2 = TRUE; 161 162 ok1 = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl); 163 if (ok1 == FALSE) 164 return; 165 #ifdef PORTMAP 166 ok2 = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl); 167 #endif 168 if (ok2 == FALSE) { 169 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl); 170 return; 171 } 172 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl); 173 list_rbl = tmp_rpcbl; 174 #ifdef PORTMAP 175 xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml); 176 list_pml = tmp_pmapl; 177 #endif 178 } 179