1 /*
2 * Copyright (c) 2009, Sun Microsystems, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28 /*
29 * warmstart.c
30 * Allows for gathering of registrations from an earlier dumped file.
31 *
32 * Copyright (c) 1990 by Sun Microsystems, Inc.
33 */
34
35 /*
36 * @(#)warmstart.c 1.7 93/07/05 SMI
37 * $FreeBSD: src/usr.sbin/rpcbind/warmstart.c,v 1.4 2007/11/07 10:53:39 kevlo Exp $
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
write_struct(char * filename,xdrproc_t structproc,void * list)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 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
read_struct(char * filename,xdrproc_t structproc,void * list)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
write_warmstart(void)144 write_warmstart(void)
145 {
146 write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl);
147 #ifdef PORTMAP
148 write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml);
149 #endif
150
151 }
152
153 void
read_warmstart(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