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

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/* $NetBSD: amq_subr.c,v 1.2 2000/06/16 02:10:12 dogcow Exp $ */
/*
* Copyright (c) 1997-2000 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.
*
* %W% (Berkeley) %G%
*
* Id: amq_subr.c,v 1.6 2000/01/12 16:44:16 ezk Exp
*
*/
/*
* Auxiliary routines for amq tool
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
/* forward definitions */
bool_t xdr_amq_mount_tree_node(XDR *xdrs, amq_mount_tree *objp);
bool_t xdr_amq_mount_subtree(XDR *xdrs, amq_mount_tree *objp);
voidp
amqproc_null_1_svc(voidp argp, struct svc_req *rqstp)
{
static char res;
return (voidp) &res;
}
/*
* Return a sub-tree of mounts
*/
amq_mount_tree_p *
amqproc_mnttree_1_svc(voidp argp, struct svc_req *rqstp)
{
static am_node *mp;
mp = find_ap(*(char **) argp);
return (amq_mount_tree_p *) &mp;
}
/*
* Unmount a single node
*/
voidp
amqproc_umnt_1_svc(voidp argp, struct svc_req *rqstp)
{
static char res;
am_node *mp = find_ap(*(char **) argp);
if (mp)
forcibly_timeout_mp(mp);
return (voidp) &res;
}
/*
* Return global statistics
*/
amq_mount_stats *
amqproc_stats_1_svc(voidp argp, struct svc_req *rqstp)
{
return (amq_mount_stats *) &amd_stats;
}
/*
* Return the entire tree of mount nodes
*/
amq_mount_tree_list *
amqproc_export_1_svc(voidp argp, struct svc_req *rqstp)
{
static amq_mount_tree_list aml;
aml.amq_mount_tree_list_val = (amq_mount_tree_p *) &exported_ap[0];
aml.amq_mount_tree_list_len = 1; /* XXX */
return &aml;
}
int *
amqproc_setopt_1_svc(voidp argp, struct svc_req *rqstp)
{
static int rc;
amq_setopt *opt = (amq_setopt *) argp;
rc = 0;
switch (opt->as_opt) {
case AMOPT_DEBUG:
#ifdef DEBUG
if (debug_option(opt->as_str))
#endif /* DEBUG */
rc = EINVAL;
break;
case AMOPT_LOGFILE:
if (gopt.logfile && opt->as_str
&& STREQ(gopt.logfile, opt->as_str)) {
if (switch_to_logfile(opt->as_str, orig_umask))
rc = EINVAL;
} else {
rc = EACCES;
}
break;
case AMOPT_XLOG:
if (switch_option(opt->as_str))
rc = EINVAL;
break;
case AMOPT_FLUSHMAPC:
if (amd_state == Run) {
plog(XLOG_INFO, "amq says flush cache");
do_mapc_reload = 0;
flush_nfs_fhandle_cache((fserver *) 0);
flush_srvr_nfs_cache();
}
break;
}
return &rc;
}
amq_mount_info_list *
amqproc_getmntfs_1_svc(voidp argp, struct svc_req *rqstp)
{
return (amq_mount_info_list *) &mfhead; /* XXX */
}
#ifdef ENABLE_AMQ_MOUNT
/*
* This is code that is vulnerable to IP spoofing attacks. Unless you
* absolutely need it, I suggest you do not enable it
* (using configure --enable-amq-mount)
*/
static int
ok_security(struct svc_req *rqstp)
{
struct sockaddr_in *sin = (struct sockaddr_in *) NULL;
if ((sin = amu_svc_getcaller(rqstp->rq_xprt)) == NULL) {
plog(XLOG_ERROR, "amu_svc_getcaller returned NULL");
return(0); /* assume security is therefore not OK */
}
if (ntohs(sin->sin_port) >= IPPORT_RESERVED ||
!(sin->sin_addr.s_addr == htonl(0x7f000001) ||
sin->sin_addr.s_addr == myipaddr.s_addr)) {
char dq[20];
plog(XLOG_INFO, "AMQ request from %s.%d DENIED",
inet_dquad(dq, sin->sin_addr.s_addr),
ntohs(sin->sin_port));
return (0);
}
return (1);
}
int *
amqproc_mount_1_svc(voidp argp, struct svc_req *rqstp)
{
static int rc = EINVAL;
char s[AMQ_STRLEN];
char *cp;
char dq[20];
struct sockaddr_in *sin;
if ((sin = amu_svc_getcaller(rqstp->rq_xprt)) == NULL) {
plog(XLOG_ERROR, "amu_svc_getcaller returned NULL");
return &rc;
}
strncpy(s, *(amq_string *) argp, AMQ_STRLEN-1);
s[AMQ_STRLEN-1] = '\0'; /* null terminate, to be sure */
plog(XLOG_ERROR,
"amq requested mount of %s from %s.%d",
s, inet_dquad(dq, sin->sin_addr.s_addr),
ntohs(sin->sin_port));
/*
* Minimalist security check.
*/
if (!ok_security(rqstp)) {
rc = EACCES;
return &rc;
}
/*
* Find end of key
*/
for (cp = (char *) s; *cp && (!isascii(*cp) || !isspace(*cp)); cp++) ;
if (!*cp) {
plog(XLOG_INFO, "amqproc_mount: Invalid arguments");
rc = EINVAL;
return &rc;
}
*cp++ = '\0';
/*
* Find start of value
*/
while (*cp && isascii(*cp) && isspace(*cp))
cp++;
root_newmap(s, cp, (char *) 0, NULL);
rc = mount_auto_node(s, (voidp) root_node);
if (rc < 0)
return 0;
return &rc;
}
#else /* not ENABLE_AMQ_MOUNT */
int *
amqproc_mount_1_svc(voidp argp, struct svc_req *rqstp)
{
static int rc = EINVAL;
char *s = *(amq_string *) argp;
char dq[20];
struct sockaddr_in *sin;
if ((sin = amu_svc_getcaller(rqstp->rq_xprt)) == NULL) {
plog(XLOG_ERROR, "amu_svc_getcaller returned NULL");
return &rc;
}
plog(XLOG_ERROR,
"amq requested mount of %s from %s.%d, but code is disabled",
s, inet_dquad(dq, sin->sin_addr.s_addr),
ntohs(sin->sin_port));
return &rc;
}
#endif /* not ENABLE_AMQ_MOUNT */
amq_string *
amqproc_getvers_1_svc(voidp argp, struct svc_req *rqstp)
{
static amq_string res;
res = get_version_string();
return &res;
}
/* get PID of remote amd */
int *
amqproc_getpid_1_svc(voidp argp, struct svc_req *rqstp)
{
static int res;
res = getpid();
return &res;
}
/*
* XDR routines.
*/
bool_t
xdr_amq_setopt(XDR *xdrs, amq_setopt *objp)
{
if (!xdr_enum(xdrs, (enum_t *) & objp->as_opt)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->as_str, AMQ_STRLEN)) {
return (FALSE);
}
return (TRUE);
}
/*
* More XDR routines - Should be used for OUTPUT ONLY.
*/
bool_t
xdr_amq_mount_tree_node(XDR *xdrs, amq_mount_tree *objp)
{
am_node *mp = (am_node *) objp;
long mtime;
if (!xdr_amq_string(xdrs, &mp->am_mnt->mf_info)) {
return (FALSE);
}
if (!xdr_amq_string(xdrs, &mp->am_path)) {
return (FALSE);
}
if (!xdr_amq_string(xdrs, mp->am_link ? &mp->am_link : &mp->am_mnt->mf_mount)) {
return (FALSE);
}
if (!xdr_amq_string(xdrs, &mp->am_mnt->mf_ops->fs_type)) {
return (FALSE);
}
mtime = mp->am_stats.s_mtime;
if (!xdr_long(xdrs, &mtime)) {
return (FALSE);
}
if (!xdr_u_short(xdrs, &mp->am_stats.s_uid)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mp->am_stats.s_getattr)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mp->am_stats.s_lookup)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mp->am_stats.s_readdir)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mp->am_stats.s_readlink)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mp->am_stats.s_statfs)) {
return (FALSE);
}
return (TRUE);
}
bool_t
xdr_amq_mount_subtree(XDR *xdrs, amq_mount_tree *objp)
{
am_node *mp = (am_node *) objp;
if (!xdr_amq_mount_tree_node(xdrs, objp)) {
return (FALSE);
}
if (!xdr_pointer(xdrs, (char **) &mp->am_osib, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
return (FALSE);
}
if (!xdr_pointer(xdrs, (char **) &mp->am_child, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
return (FALSE);
}
return (TRUE);
}
bool_t
xdr_amq_mount_tree(XDR *xdrs, amq_mount_tree *objp)
{
am_node *mp = (am_node *) objp;
am_node *mnil = 0;
if (!xdr_amq_mount_tree_node(xdrs, objp)) {
return (FALSE);
}
if (!xdr_pointer(xdrs, (char **) &mnil, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
return (FALSE);
}
if (!xdr_pointer(xdrs, (char **) &mp->am_child, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
return (FALSE);
}
return (TRUE);
}
bool_t
xdr_amq_mount_tree_p(XDR *xdrs, amq_mount_tree_p *objp)
{
if (!xdr_pointer(xdrs, (char **) objp, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_tree)) {
return (FALSE);
}
return (TRUE);
}
bool_t
xdr_amq_mount_stats(XDR *xdrs, amq_mount_stats *objp)
{
if (!xdr_int(xdrs, &objp->as_drops)) {
return (FALSE);
}
if (!xdr_int(xdrs, &objp->as_stale)) {
return (FALSE);
}
if (!xdr_int(xdrs, &objp->as_mok)) {
return (FALSE);
}
if (!xdr_int(xdrs, &objp->as_merr)) {
return (FALSE);
}
if (!xdr_int(xdrs, &objp->as_uerr)) {
return (FALSE);
}
return (TRUE);
}
bool_t
xdr_amq_mount_tree_list(XDR *xdrs, amq_mount_tree_list *objp)
{
if (!xdr_array(xdrs,
(char **) &objp->amq_mount_tree_list_val,
(u_int *) &objp->amq_mount_tree_list_len,
~0,
sizeof(amq_mount_tree_p),
(XDRPROC_T_TYPE) xdr_amq_mount_tree_p)) {
return (FALSE);
}
return (TRUE);
}
/*
* Compute length of list
*/
bool_t
xdr_amq_mount_info_qelem(XDR *xdrs, qelem *qhead)
{
mntfs *mf;
u_int len = 0;
for (mf = AM_LAST(mntfs, qhead); mf != HEAD(mntfs, qhead); mf = PREV(mntfs, mf)) {
if (!(mf->mf_ops->fs_flags & FS_AMQINFO))
continue;
len++;
}
xdr_u_int(xdrs, &len);
/*
* Send individual data items
*/
for (mf = AM_LAST(mntfs, qhead); mf != HEAD(mntfs, qhead); mf = PREV(mntfs, mf)) {
int up;
if (!(mf->mf_ops->fs_flags & FS_AMQINFO))
continue;
if (!xdr_amq_string(xdrs, &mf->mf_ops->fs_type)) {
return (FALSE);
}
if (!xdr_amq_string(xdrs, &mf->mf_mount)) {
return (FALSE);
}
if (!xdr_amq_string(xdrs, &mf->mf_info)) {
return (FALSE);
}
if (!xdr_amq_string(xdrs, &mf->mf_server->fs_host)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mf->mf_error)) {
return (FALSE);
}
if (!xdr_int(xdrs, &mf->mf_refc)) {
return (FALSE);
}
if (mf->mf_server->fs_flags & FSF_ERROR)
up = 0;
else
switch (mf->mf_server->fs_flags & (FSF_DOWN | FSF_VALID)) {
case FSF_DOWN | FSF_VALID:
up = 0;
break;
case FSF_VALID:
up = 1;
break;
default:
up = -1;
break;
}
if (!xdr_int(xdrs, &up)) {
return (FALSE);
}
}
return (TRUE);
}
bool_t
xdr_pri_free(XDRPROC_T_TYPE xdr_args, caddr_t args_ptr)
{
XDR xdr;
xdr.x_op = XDR_FREE;
return ((*xdr_args) (&xdr, (caddr_t *) args_ptr));
}