1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
20 *
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29/*
30 * warmstart.c
31 * Allows for gathering of registrations from a earlier dumped file.
32 *
33 * Copyright (c) 1990 by Sun Microsystems, Inc.
34 */
35
36#ident	"@(#)warmstart.c	1.7	93/07/05 SMI"
37
38#include <sys/types.h>
39#include <sys/stat.h>
40#include <stdio.h>
41#include <fcntl.h>
42#include <err.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#ifdef WARMSTART
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
67static bool_t write_struct(const char *, xdrproc_t, void *);
68static bool_t read_struct(const char *, xdrproc_t, void *);
69
70static bool_t
71write_struct(const char *filename, xdrproc_t structproc, void *list)
72{
73	FILE *fp;
74	int fd;
75	XDR xdrs;
76
77	(void)unlink(filename);
78	fd = open(filename, O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR);
79	if (fd == -1 || (fp = fdopen(fd, "w")) == NULL) {
80		syslog(LOG_ERR, "Cannot open `%s' (%m)", filename);
81		syslog(LOG_ERR, "Cannot save any registration");
82		return FALSE;
83	}
84
85	xdrstdio_create(&xdrs, fp, XDR_ENCODE);
86
87	if (structproc(&xdrs, list) == FALSE) {
88		syslog(LOG_ERR, "xdr_%s: failed", filename);
89		(void)fclose(fp);
90		return (FALSE);
91	}
92	XDR_DESTROY(&xdrs);
93	(void)fclose(fp);
94	return TRUE;
95}
96
97static bool_t
98read_struct(const char *filename, xdrproc_t structproc, void *list)
99{
100	FILE *fp;
101	XDR xdrs;
102	struct stat sbuf;
103
104	if (stat(filename, &sbuf) != 0) {
105		warn("Cannot stat `%s'", filename);
106		goto error;
107	}
108	if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) ||
109	    (sbuf.st_mode & S_IRWXO)) {
110		warnx("Invalid permissions on `%s'", filename);
111		goto error;
112	}
113	fp = fopen(filename, "r");
114	if (fp == NULL) {
115		warn("cannot open `%s'", filename);
116		goto error;
117	}
118	xdrstdio_create(&xdrs, fp, XDR_DECODE);
119
120	if (structproc(&xdrs, list) == FALSE) {
121		warnx("xdr_%s failed", filename);
122		(void)fclose(fp);
123		goto error;
124	}
125	XDR_DESTROY(&xdrs);
126	(void)fclose(fp);
127	return TRUE;
128
129error:	warnx("Will start from scratch");
130	return FALSE;
131}
132
133void
134write_warmstart(void)
135{
136	(void)write_struct(RPCBFILE, xdr_rpcblist_ptr, &list_rbl);
137#ifdef PORTMAP
138	(void)write_struct(PMAPFILE, xdr_pmaplist_ptr, &list_pml);
139#endif
140
141}
142
143void
144read_warmstart(void)
145{
146	rpcblist_ptr tmp_rpcbl = NULL;
147#ifdef PORTMAP
148	struct pmaplist *tmp_pmapl = NULL;
149#endif
150	int ok1, ok2 = TRUE;
151
152	ok1 = read_struct(RPCBFILE, xdr_rpcblist_ptr, &tmp_rpcbl);
153	if (ok1 == FALSE)
154		return;
155#ifdef PORTMAP
156	ok2 = read_struct(PMAPFILE, xdr_pmaplist_ptr, &tmp_pmapl);
157#endif
158	if (ok2 == FALSE) {
159		xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl);
160		return;
161	}
162	xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl);
163	list_rbl = tmp_rpcbl;
164#ifdef PORTMAP
165	xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml);
166	list_pml = tmp_pmapl;
167#endif
168}
169#endif
170