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
write_struct(char * filename,xdrproc_t structproc,void * list)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
read_struct(char * filename,xdrproc_t structproc,void * list)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
write_warmstart(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
read_warmstart(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