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/*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* warmstart.c
* Allows for gathering of registrations from an earlier dumped file.
*
* Copyright (c) 1990 by Sun Microsystems, Inc.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <rpc/rpc.h>
#include <rpc/rpcb_prot.h>
#include <rpc/xdr.h>
#ifdef PORTMAP
#include <netinet/in.h>
#include <rpc/pmap_prot.h>
#endif
#include <syslog.h>
#include <unistd.h>
#include <errno.h>
#include "rpcbind.h"
#ifndef RPCBIND_STATEDIR
#define RPCBIND_STATEDIR "/tmp"
#endif
/* These files keep the pmap_list and rpcb_list in XDR format */
#define RPCBFILE RPCBIND_STATEDIR "/rpcbind.xdr"
#ifdef PORTMAP
#define PMAPFILE RPCBIND_STATEDIR "/portmap.xdr"
#endif
static bool_t write_struct __P((char *, xdrproc_t, void *));
static bool_t read_struct __P((char *, xdrproc_t, void *));
static bool_t
write_struct(char *filename, xdrproc_t structproc, void *list)
{
FILE *fp;
XDR xdrs;
mode_t omask;
omask = umask(077);
fp = fopen(filename, "w");
if (fp == NULL) {
int i;
for (i = 0; i < 10; i++)
close(i);
fp = fopen(filename, "w");
if (fp == NULL) {
syslog(LOG_ERR,
"cannot open file = %s for writing", filename);
syslog(LOG_ERR, "cannot save any registration");
return (FALSE);
}
}
(void) umask(omask);
xdrstdio_create(&xdrs, fp, XDR_ENCODE);
if (structproc(&xdrs, list) == FALSE) {
syslog(LOG_ERR, "xdr_%s: failed", filename);
fclose(fp);
return (FALSE);
}
XDR_DESTROY(&xdrs);
fclose(fp);
return (TRUE);
}
static bool_t
read_struct(char *filename, xdrproc_t structproc, void *list)
{
FILE *fp;
XDR xdrs;
if (debugging)
fprintf(stderr, "rpcbind: using '%s' startup file\n", filename);
if ((fp = fopen(filename, "r")) == NULL) {
if (errno != ENOENT)
syslog(LOG_ERR,
"Cannot open '%s' file for reading, errno %d (%s)",
filename, errno, strerror(errno));
goto error;
}
xdrstdio_create(&xdrs, fp, XDR_DECODE);
if (structproc(&xdrs, list) == FALSE) {
fprintf(stderr, "rpcbind: xdr_%s: failed\n", filename);
fclose(fp);
goto error;
}
XDR_DESTROY(&xdrs);
fclose(fp);
if (unlink(filename) < 0) {
syslog(LOG_ERR, "Cannot unlink '%s', errno %d (%s)",
filename, errno, strerror(errno));
}
return (TRUE);
error:
if (errno != ENOENT && unlink(filename) < 0) {
syslog(LOG_ERR, "Cannot unlink '%s', errno %d (%s)",
filename, errno, strerror(errno));
}
if (debugging)
fprintf(stderr, "rpcbind: will start from scratch\n");
return (FALSE);
}
void
write_warmstart()
{
(void) write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl);
#ifdef PORTMAP
(void) write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml);
#endif
}
void
read_warmstart()
{
rpcblist_ptr tmp_rpcbl = NULL;
#ifdef PORTMAP
struct pmaplist *tmp_pmapl = NULL;
#endif
int rc;
rc = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl);
if (rc == TRUE) {
rpcblist *pos, **tail;
/* The current rpcblist contains only the registrations
* for rpcbind and portmap. We keep those, since the
* info from the warm start file may be stale if the
* netconfig file was changed in the meantime.
* From the warm start file, we weed out any rpcbind info.
*/
for (tail = &list_rbl; *tail; tail = &(*tail)->rpcb_next)
;
while ((pos = tmp_rpcbl) != NULL) {
tmp_rpcbl = pos->rpcb_next;
if (pos->rpcb_map.r_prog != RPCBPROG) {
*tail = pos;
tail = &pos->rpcb_next;
} else {
free(pos);
}
}
*tail = NULL;
}
#ifdef PORTMAP
rc = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl);
if (rc == TRUE) {
struct pmaplist *pos, **tail;
/* The current pmaplist contains only the registrations
* for rpcbind and portmap. We keep those, since the
* info from the warm start file may be stale if the
* netconfig file was changed in the meantime.
* From the warm start file, we weed out any rpcbind info.
*/
for (tail = &list_pml; *tail; tail = &(*tail)->pml_next)
;
while ((pos = tmp_pmapl) != NULL) {
tmp_pmapl = pos->pml_next;
if (pos->pml_map.pm_prog != PMAPPROG) {
*tail = pos;
tail = &pos->pml_next;
} else {
free(pos);
}
}
*tail = NULL;
}
#endif
return;
}
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