getservent.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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
*/
/*
* getservent.c
*
* Copyright (c) 1988-1992 Sun Microsystems Inc
* All Rights Reserved.
*
* nisplus/getservent.c -- NIS+ backend for nsswitch "serv" database
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <string.h>
#include <netdb.h>
#include <stdlib.h>
#include "nisplus_common.h"
#include "nisplus_tables.h"
static nss_status_t
getbyname(be, a)
nisplus_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a;
/*
* Don't have to do anything for case-insensitivity; the NIS+ table
* has the right flags enabled in the 'cname' and 'name' columns.
*
* Make sure that nis_object2ent would cull out only those entries
* with the given protocol if it is non-NULL, or the first one it
* finds in the nis_object if user supplied proto is NULL.
*/
return (_nss_nisplus_lookup(be, argp, SERV_TAG_NAME,
argp->key.serv.serv.name));
}
static nss_status_t
getbyport(be, a)
nisplus_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a;
char portstr[12];
/*
* Make sure that nis_object2ent would cull out only those entries
* with the given protocol if it is non-NULL, or the first one it
* finds in the nis_object if user supplied proto is NULL.
*/
sprintf(portstr, "%d", ntohs((u_short)argp->key.serv.serv.port));
return (_nss_nisplus_lookup(be, argp, SERV_TAG_PORT, portstr));
}
/*
* place the results from the nis_object structure into argp->buf.result
* Returns NSS_STR_PARSE_{SUCCESS, ERANGE, PARSE}
*/
static int
nis_object2ent(nobj, obj, argp)
int nobj;
nis_object *obj;
nss_XbyY_args_t *argp;
{
char *buffer, *limit, *val;
int buflen = argp->buf.buflen;
struct servent *serv;
int len, ret;
struct entry_col *ecol;
const char *proto = argp->key.serv.proto;
int i;
limit = argp->buf.buffer + buflen;
serv = (struct servent *)argp->buf.result;
buffer = argp->buf.buffer;
/*
* If the caller does not care about a specific protocol
* (udp or tcp usually), pick the one from the first nis_object
* and parse all the entries associated with only this protocol.
* NULL proto is also specified by getservent() functions. We
* end up doing extraneous work in the case.
*/
if (proto == NULL) {
if (obj->zo_data.zo_type != NIS_ENTRY_OBJ ||
obj->EN_data.en_cols.en_cols_len < SERV_COL) {
return (NSS_STR_PARSE_PARSE);
}
ecol = obj->EN_data.en_cols.en_cols_val;
EC_SET(ecol, SERV_NDX_PROTO, len, proto);
if (len < 2)
return (NSS_STR_PARSE_PARSE);
} else {
len = strlen(proto) + 1;
}
/*
* Return (a copy of) proto in serv->s_proto
*/
if (buffer + len > limit) {
return (NSS_STR_PARSE_ERANGE);
}
memcpy(buffer, proto, len);
serv->s_proto = buffer;
buffer += len;
buflen -= len;
/*
* <-----buffer + buflen -------------->
* |-----------------|----------------|
* | pointers vector | aliases grow |
* | for aliases | |
* | this way -> | <- this way |
* |-----------------|----------------|
*
*
* ASSUME: name, aliases, proto and port columns in NIS+ tables ARE
* null terminated.
*
* get cname and aliases
*/
serv->s_aliases = (char **) ROUND_UP(buffer, sizeof (char **));
if ((char *)serv->s_aliases >= limit) {
return (NSS_STR_PARSE_ERANGE);
}
serv->s_name = NULL;
/*
* Assume that CNAME is the first column and NAME the second.
*/
ret = netdb_aliases_from_nisobj(obj, nobj, proto,
serv->s_aliases, &limit, &(serv->s_name), &len);
if (ret != NSS_STR_PARSE_SUCCESS)
return (ret);
/*
* Read port from the first object having the desired protocol.
* There is guaranteed to be at least one such object, or
* netdb_aliases_from_nisobj() wouldn't have returned SUCCESS.
*/
for (i = 0; i < nobj; i++) {
ecol = obj[i].EN_data.en_cols.en_cols_val;
EC_SET(ecol, SERV_NDX_PROTO, len, val);
if (len < 2)
return (NSS_STR_PARSE_PARSE);
if (strcmp(proto, val) == 0)
break;
}
if (i == nobj) { /* none found... can't happen, but what the heck */
return (NSS_STR_PARSE_PARSE);
}
EC_SET(ecol, SERV_NDX_PORT, len, val);
if (len < 2) {
return (NSS_STR_PARSE_PARSE);
}
serv->s_port = htons((u_short)atoi(val));
return (NSS_STR_PARSE_SUCCESS);
}
static nisplus_backend_op_t serv_ops[] = {
_nss_nisplus_destr,
_nss_nisplus_endent,
_nss_nisplus_setent,
_nss_nisplus_getent,
getbyname,
getbyport
};
/*ARGSUSED*/
nss_backend_t *
_nss_nisplus_services_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_nisplus_constr(serv_ops,
sizeof (serv_ops) / sizeof (serv_ops[0]),
SERV_TBLNAME, nis_object2ent));
}