getservent.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* nis/getservent.c -- "nis" backend for nsswitch "services" database
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "nis_common.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <malloc.h>
#include <netdb.h>
#include <synch.h>
#include <ctype.h>
#include <rpcsvc/ypclnt.h>
#include <thread.h>
#include <sys/types.h>
#include <netinet/in.h>
static int
check_name(args)
nss_XbyY_args_t *args;
{
struct servent *serv = (struct servent *)args->returnval;
const char *name = args->key.serv.serv.name;
const char *proto = args->key.serv.proto;
char **aliasp;
if (proto != 0 && strcmp(serv->s_proto, proto) != 0) {
return (0);
}
if (strcmp(serv->s_name, name) == 0) {
return (1);
}
for (aliasp = serv->s_aliases; *aliasp != 0; aliasp++) {
if (strcmp(*aliasp, name) == 0) {
return (1);
}
}
return (0);
}
static int
check_name2(nss_XbyY_args_t *argp)
{
const char *limit, *linep, *keyp;
int name_match = 0;
linep = (const char *)argp->buf.buffer;
limit = linep + strlen(argp->buf.buffer);
keyp = argp->key.serv.serv.name;
/* compare name */
while (*keyp && linep < limit && !isspace(*linep) && *keyp == *linep) {
keyp++;
linep++;
}
if (*keyp == '\0' && linep < limit && isspace(*linep)) {
if (argp->key.serv.proto == NULL)
return (1);
else
name_match = 1;
}
/* skip remainder of the name, if any */
while (linep < limit && !isspace(*linep))
linep++;
/* skip the delimiting spaces */
while (linep < limit && isspace(*linep))
linep++;
/* skip port number */
while (linep < limit && !isspace(*linep) && *linep != '/')
linep++;
if (linep == limit || *linep != '/')
return (0);
linep++;
if ((keyp = argp->key.serv.proto) == NULL) {
/* skip protocol */
while (linep < limit && !isspace(*linep))
linep++;
} else {
/* compare protocol */
while (*keyp && linep < limit && !isspace(*linep) &&
*keyp == *linep) {
keyp++;
linep++;
}
/* no protocol match */
if (*keyp || (linep < limit && !isspace(*linep)))
return (0);
/* protocol and name match, return */
if (name_match)
return (1);
/* protocol match but name yet to be matched, so continue */
}
/* compare with the aliases */
while (linep < limit) {
/* skip the delimiting spaces */
while (linep < limit && isspace(*linep))
linep++;
/* compare with the alias name */
keyp = argp->key.serv.serv.name;
while (*keyp && linep < limit && !isspace(*linep) &&
*keyp == *linep) {
keyp++;
linep++;
}
if (*keyp == '\0' && (linep == limit || isspace(*linep)))
return (1);
/* skip remainder of the alias name, if any */
while (linep < limit && !isspace(*linep))
linep++;
}
return (0);
}
static mutex_t no_byname_lock = DEFAULTMUTEX;
static int no_byname_map = 0;
static nss_status_t
getbyname(be, a)
nis_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
const char *name = argp->key.serv.serv.name;
const char *proto = argp->key.serv.proto;
int no_map;
sigset_t oldmask, newmask;
(void) sigfillset(&newmask);
(void) thr_sigsetmask(SIG_SETMASK, &newmask, &oldmask);
(void) mutex_lock(&no_byname_lock);
no_map = no_byname_map;
(void) mutex_unlock(&no_byname_lock);
(void) thr_sigsetmask(SIG_SETMASK, &oldmask, NULL);
if (no_map == 0) {
int yp_status;
nss_status_t res;
if (proto == 0) {
res = _nss_nis_lookup(be, argp, 1,
"services.byservicename", name, &yp_status);
} else {
int len = strlen(name) + strlen(proto) + 3;
char *key = malloc(len);
if (key == NULL) {
return (NSS_UNAVAIL);
}
(void) snprintf(key, len, "%s/%s", name, proto);
res = _nss_nis_lookup(be, argp, 1,
"services.byservicename", key, &yp_status);
free(key);
}
if (yp_status == YPERR_MAP) {
(void) sigfillset(&newmask);
(void) thr_sigsetmask(SIG_SETMASK, &newmask, &oldmask);
(void) mutex_lock(&no_byname_lock);
no_byname_map = 1;
(void) mutex_unlock(&no_byname_lock);
(void) thr_sigsetmask(SIG_SETMASK, &oldmask,
(sigset_t *)NULL);
} else /* if (res == NSS_SUCCESS) <==== */ {
return (res);
}
}
/*
* use check_anme to compare service name if nss1 or nss2 and
* request is not from nscd; otherwise use check_name2
*/
if (argp->buf.result != NULL)
return (_nss_nis_XY_all(be, argp, 1, name, check_name));
else
return (_nss_nis_XY_all(be, argp, 1, name, check_name2));
}
static int
check_port(args)
nss_XbyY_args_t *args;
{
struct servent *serv = (struct servent *)args->returnval;
/*
* We only resorted to _nss_nis_XY_all because proto == 0, so just...
*/
return (serv->s_port == args->key.serv.serv.port);
}
static int
check_port2(nss_XbyY_args_t *argp)
{
const char *limit, *linep, *keyp, *numstart;
int numlen, s_port;
char numbuf[12], *numend;
linep = (const char *)argp->buf.buffer;
limit = linep + strlen(argp->buf.buffer);
/* skip name */
while (linep < limit && !isspace(*linep))
linep++;
/* skip the delimiting spaces */
while (linep < limit && isspace(*linep))
linep++;
/* compare port num */
numstart = linep;
while (linep < limit && !isspace(*linep) && *linep != '/')
linep++;
if (linep == limit || *linep != '/')
return (0);
numlen = linep - numstart;
if (numlen == 0 || numlen >= sizeof (numbuf))
return (0);
(void) memcpy(numbuf, numstart, numlen);
numbuf[numlen] = '\0';
s_port = htons((int)strtol(numbuf, &numend, 10));
if (*numend != '\0')
return (0);
if (s_port == argp->key.serv.serv.port) {
if ((keyp = argp->key.serv.proto) == NULL)
return (1);
} else
return (0);
/* compare protocol */
linep++;
while (*keyp && linep < limit && !isspace(*linep) && *keyp == *linep) {
keyp++;
linep++;
}
return (*keyp == '\0' && (linep == limit || isspace(*linep)));
}
static nss_status_t
getbyport(be, a)
nis_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
int port = ntohs(argp->key.serv.serv.port);
const char *proto = argp->key.serv.proto;
char *key;
nss_status_t res;
int len;
if (proto == 0) {
char portstr[12];
(void) snprintf(portstr, 12, "%d", port);
/*
* use check_port to compare service port if nss1 or
* nss2 and request is not from nscd; otherwise use
* check_port2
*/
if (argp->buf.result != NULL)
return (_nss_nis_XY_all(be, argp, 1, portstr,
check_port));
else
return (_nss_nis_XY_all(be, argp, 1, portstr,
check_port2));
}
len = strlen(proto) + 14;
if ((key = malloc(len)) == 0) {
return (NSS_UNAVAIL);
}
(void) snprintf(key, len, "%d/%s", port, proto);
res = _nss_nis_lookup(be, argp, 1, "services.byname", key, 0);
free(key);
return (res);
}
static nis_backend_op_t serv_ops[] = {
_nss_nis_destr,
_nss_nis_endent,
_nss_nis_setent,
_nss_nis_getent_netdb,
getbyname,
getbyport
};
/*ARGSUSED*/
nss_backend_t *
_nss_nis_services_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_nis_constr(serv_ops,
sizeof (serv_ops) / sizeof (serv_ops[0]),
"services.byname"));
}