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