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NetBSD/dist/am-utils/amd/amq_svc.c

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/* $NetBSD: amq_svc.c,v 1.1.1.7 2004/11/27 01:00:38 christos Exp $ */
/*
* Copyright (c) 1997-2004 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgment:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
*
* Id: amq_svc.c,v 1.15 2004/01/06 03:56:20 ezk Exp
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
/* typedefs */
typedef char *(*amqsvcproc_t)(voidp, struct svc_req *);
#if defined(HAVE_TCPD_H) && defined(HAVE_LIBWRAP)
# ifdef NEED_LIBWRAP_SEVERITY_VARIABLES
/*
* Some systems that define libwrap already define these two variables
* in libwrap, while others don't: so I need to know precisely iff
* to define these two severity variables.
*/
int allow_severity=0, deny_severity=0;
# endif /* NEED_LIBWRAP_SEVERITY_VARIABLES */
/*
* check if remote amq is authorized to access this amd.
* Returns: 1=allowed, 0=denied.
*/
static int
amqsvc_is_client_allowed(const struct sockaddr_in *addr, char *remote)
{
struct hostent *h;
char *name, **ad;
/* Check IP address */
if (hosts_ctl(AMD_SERVICE_NAME, "", remote, ""))
return 1;
/* Get address */
if (!(h = gethostbyaddr((const char *)&(addr->sin_addr),
sizeof(addr->sin_addr),
AF_INET)))
return 0;
if (!(name = alloca(strlen(h->h_name)+1)))
return 0;
strcpy(name, h->h_name);
/* Paranoia check */
if (!(h = gethostbyname(name)))
return 0;
for (ad = h->h_addr_list; *ad; ad++)
if (!memcmp(*ad, &(addr->sin_addr), h->h_length))
break;
if (!*ad)
return 0;
if (hosts_ctl(AMD_SERVICE_NAME, "", h->h_name, ""))
return 1;
/* Check aliases */
for (ad = h->h_aliases; *ad; ad++)
if (hosts_ctl(AMD_SERVICE_NAME, "", *ad, ""))
return 1;
return 0;
}
#endif /* defined(HAVE_TCPD_H) && defined(HAVE_LIBWRAP) */
void
amq_program_1(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
amq_string amqproc_mnttree_1_arg;
amq_string amqproc_umnt_1_arg;
amq_setopt amqproc_setopt_1_arg;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
amqsvcproc_t local;
#if defined(HAVE_TCPD_H) && defined(HAVE_LIBWRAP)
if (gopt.flags & CFM_USE_TCPWRAPPERS) {
struct sockaddr_in *remote_addr = svc_getcaller(rqstp->rq_xprt);
char *remote_hostname = inet_ntoa(remote_addr->sin_addr);
if (!amqsvc_is_client_allowed(remote_addr, remote_hostname)) {
plog(XLOG_WARNING, "Amd denied remote amq service to %s", remote_hostname);
svcerr_auth(transp, AUTH_FAILED);
return;
} else {
dlog("Amd allowed remote amq service to %s", remote_hostname);
}
}
#endif /* defined(HAVE_TCPD_H) && defined(HAVE_LIBWRAP) */
switch (rqstp->rq_proc) {
case AMQPROC_NULL:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_void;
local = (amqsvcproc_t) amqproc_null_1_svc;
break;
case AMQPROC_MNTTREE:
xdr_argument = (xdrproc_t) xdr_amq_string;
xdr_result = (xdrproc_t) xdr_amq_mount_tree_p;
local = (amqsvcproc_t) amqproc_mnttree_1_svc;
break;
case AMQPROC_UMNT:
xdr_argument = (xdrproc_t) xdr_amq_string;
xdr_result = (xdrproc_t) xdr_void;
local = (amqsvcproc_t) amqproc_umnt_1_svc;
break;
case AMQPROC_STATS:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_amq_mount_stats;
local = (amqsvcproc_t) amqproc_stats_1_svc;
break;
case AMQPROC_EXPORT:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_amq_mount_tree_list;
local = (amqsvcproc_t) amqproc_export_1_svc;
break;
case AMQPROC_SETOPT:
xdr_argument = (xdrproc_t) xdr_amq_setopt;
xdr_result = (xdrproc_t) xdr_int;
local = (amqsvcproc_t) amqproc_setopt_1_svc;
break;
case AMQPROC_GETMNTFS:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_amq_mount_info_qelem;
local = (amqsvcproc_t) amqproc_getmntfs_1_svc;
break;
case AMQPROC_GETVERS:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_amq_string;
local = (amqsvcproc_t) amqproc_getvers_1_svc;
break;
case AMQPROC_GETPID:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_int;
local = (amqsvcproc_t) amqproc_getpid_1_svc;
break;
default:
svcerr_noproc(transp);
return;
}
memset((char *) &argument, 0, sizeof(argument));
if (!svc_getargs(transp,
(XDRPROC_T_TYPE) xdr_argument,
(SVC_IN_ARG_TYPE) & argument)) {
svcerr_decode(transp);
return;
}
result = (*local) (&argument, rqstp);
if (result != NULL && !svc_sendreply(transp,
(XDRPROC_T_TYPE) xdr_result,
result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp,
(XDRPROC_T_TYPE) xdr_argument,
(SVC_IN_ARG_TYPE) & argument)) {
plog(XLOG_FATAL, "unable to free rpc arguments in amqprog_1");
going_down(1);
}
}
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