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/* $NetBSD: check_bound.c,v 1.2 2000/06/22 08:09:26 fvdl Exp $ */
/* $FreeBSD$ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
*/
/* #ident "@(#)check_bound.c 1.15 93/07/05 SMI" */
#if 0
#ifndef lint
static char sccsid[] = "@(#)check_bound.c 1.11 89/04/21 Copyr 1989 Sun Micro";
#endif
#endif
/*
* check_bound.c
* Checks to see whether the program is still bound to the
* claimed address and returns the univeral merged address
*
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <stdio.h>
#include <netconfig.h>
#include <syslog.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include "rpcbind.h"
struct fdlist {
int fd;
struct netconfig *nconf;
struct fdlist *next;
int check_binding;
};
static struct fdlist *fdhead; /* Link list of the check fd's */
static struct fdlist *fdtail;
static char *nullstring = "";
static bool_t check_bound __P((struct fdlist *, char *uaddr));
/*
* Returns 1 if the given address is bound for the given addr & transport
* For all error cases, we assume that the address is bound
* Returns 0 for success.
*/
static bool_t
check_bound(struct fdlist *fdl, char *uaddr)
{
int fd;
struct netbuf *na;
int ans;
if (fdl->check_binding == FALSE)
return (TRUE);
na = uaddr2taddr(fdl->nconf, uaddr);
if (!na)
return (TRUE); /* punt, should never happen */
fd = __rpc_nconf2fd(fdl->nconf);
if (fd < 0) {
free(na->buf);
free(na);
return (TRUE);
}
ans = bind(fd, (struct sockaddr *)na->buf, na->len);
close(fd);
free(na->buf);
free(na);
return (ans == 0 ? FALSE : TRUE);
}
int
add_bndlist(struct netconfig *nconf, struct netbuf *baddr)
{
struct fdlist *fdl;
struct netconfig *newnconf;
newnconf = getnetconfigent(nconf->nc_netid);
if (newnconf == NULL)
return (-1);
fdl = (struct fdlist *)malloc((u_int)sizeof (struct fdlist));
if (fdl == NULL) {
freenetconfigent(newnconf);
syslog(LOG_ERR, "no memory!");
return (-1);
}
fdl->nconf = newnconf;
fdl->next = NULL;
if (fdhead == NULL) {
fdhead = fdl;
fdtail = fdl;
} else {
fdtail->next = fdl;
fdtail = fdl;
}
/* XXX no bound checking for now */
fdl->check_binding = FALSE;
return 0;
}
bool_t
is_bound(char *netid, char *uaddr)
{
struct fdlist *fdl;
for (fdl = fdhead; fdl; fdl = fdl->next)
if (strcmp(fdl->nconf->nc_netid, netid) == 0)
break;
if (fdl == NULL)
return (TRUE);
return (check_bound(fdl, uaddr));
}
/*
* Returns NULL if there was some system error.
* Returns "" if the address was not bound, i.e the server crashed.
* Returns the merged address otherwise.
*/
char *
mergeaddr(SVCXPRT *xprt, char *netid, char *uaddr, char *saddr)
{
struct fdlist *fdl;
char *c_uaddr, *s_uaddr, *m_uaddr, *allocated_uaddr = NULL;
for (fdl = fdhead; fdl; fdl = fdl->next)
if (strcmp(fdl->nconf->nc_netid, netid) == 0)
break;
if (fdl == NULL)
return (NULL);
if (check_bound(fdl, uaddr) == FALSE)
/* that server died */
return (nullstring);
/*
* If saddr is not NULL, the remote client may have included the
* address by which it contacted us. Use that for the "client" uaddr,
* otherwise use the info from the SVCXPRT.
*/
if (saddr != NULL) {
c_uaddr = saddr;
} else {
c_uaddr = taddr2uaddr(fdl->nconf, svc_getrpccaller(xprt));
if (c_uaddr == NULL) {
syslog(LOG_ERR, "taddr2uaddr failed for %s",
fdl->nconf->nc_netid);
return (NULL);
}
allocated_uaddr = c_uaddr;
}
#ifdef ND_DEBUG
if (debugging) {
if (saddr == NULL) {
fprintf(stderr, "mergeaddr: client uaddr = %s\n",
c_uaddr);
} else {
fprintf(stderr, "mergeaddr: contact uaddr = %s\n",
c_uaddr);
}
}
#endif
s_uaddr = uaddr;
/*
* This is all we should need for IP 4 and 6
*/
m_uaddr = addrmerge(svc_getrpccaller(xprt), s_uaddr, c_uaddr, netid);
#ifdef ND_DEBUG
if (debugging)
fprintf(stderr, "mergeaddr: uaddr = %s, merged uaddr = %s\n",
uaddr, m_uaddr);
#endif
if (allocated_uaddr != NULL)
free(allocated_uaddr);
return (m_uaddr);
}
/*
* Returns a netconf structure from its internal list. This
* structure should not be freed.
*/
struct netconfig *
rpcbind_get_conf(char *netid)
{
struct fdlist *fdl;
for (fdl = fdhead; fdl; fdl = fdl->next)
if (strcmp(fdl->nconf->nc_netid, netid) == 0)
break;
if (fdl == NULL)
return (NULL);
return (fdl->nconf);
}
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