NetBSD/dist/bind/lib/irs/nis_ng.c

302 lines
6.5 KiB
C

/* $NetBSD: nis_ng.c,v 1.2 2002/06/20 11:43:05 itojun Exp $ */
/*
* Copyright (c) 1996,1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "Id: nis_ng.c,v 1.17 2001/05/29 05:49:14 marka Exp";
#endif
/* Imports */
#include "port_before.h"
#ifndef WANT_IRS_NIS
static int __bind_irs_nis_unneeded;
#else
#include <sys/types.h>
#include <netinet/in.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <isc/assertions.h>
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <isc/memcluster.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "nis_p.h"
/* Definitions */
struct tmpgrp {
const char * name;
const char * host;
const char * user;
const char * domain;
struct tmpgrp * next;
};
struct pvt {
char * nis_domain;
struct tmpgrp * tmp;
struct tmpgrp * cur;
char * tmpgroup;
};
enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
static /*const*/ char netgroup_map[] = "netgroup";
/* Forward */
static void ng_close(struct irs_ng *);
static int ng_next(struct irs_ng *, const char **,
const char **, const char **);
static int ng_test(struct irs_ng *,
const char *, const char *,
const char *, const char *);
static void ng_rewind(struct irs_ng *, const char *);
static void ng_minimize(struct irs_ng *);
static void add_group_to_list(struct pvt *, const char *, int);
static void add_tuple_to_list(struct pvt *, const char *, char *);
static void tmpfree(struct pvt *);
/* Public */
struct irs_ng *
irs_nis_ng(struct irs_acc *this) {
struct irs_ng *ng;
struct pvt *pvt;
if (!(ng = memget(sizeof *ng))) {
errno = ENOMEM;
return (NULL);
}
memset(ng, 0x5e, sizeof *ng);
if (!(pvt = memget(sizeof *pvt))) {
memput(ng, sizeof *ng);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->nis_domain = ((struct nis_p *)this->private)->domain;
ng->private = pvt;
ng->close = ng_close;
ng->next = ng_next;
ng->test = ng_test;
ng->rewind = ng_rewind;
ng->minimize = ng_minimize;
return (ng);
}
/* Methods */
static void
ng_close(struct irs_ng *this) {
struct pvt *pvt = (struct pvt *)this->private;
tmpfree(pvt);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static int
ng_next(struct irs_ng *this, const char **host, const char **user, const char **domain) {
struct pvt *pvt = (struct pvt *)this->private;
if (!pvt->cur)
return (0);
*host = pvt->cur->host;
*user = pvt->cur->user;
*domain = pvt->cur->domain;
pvt->cur = pvt->cur->next;
return (1);
}
static int
ng_test(struct irs_ng *this, const char *name,
const char *host, const char *user, const char *domain)
{
struct pvt *pvt = (struct pvt *)this->private;
struct tmpgrp *cur;
tmpfree(pvt);
add_group_to_list(pvt, name, strlen(name));
for (cur = pvt->tmp; cur; cur = cur->next) {
if ((!host || !cur->host || !strcmp(host, cur->host)) &&
(!user || !cur->user || !strcmp(user, cur->user)) &&
(!domain || !cur->domain || !strcmp(domain, cur->domain)))
break;
}
tmpfree(pvt);
return ((cur == NULL) ? 0 : 1);
}
static void
ng_rewind(struct irs_ng *this, const char *name) {
struct pvt *pvt = (struct pvt *)this->private;
/* Either hand back or free the existing list. */
if (pvt->tmpgroup) {
if (pvt->tmp && !strcmp(pvt->tmpgroup, name))
goto reset;
tmpfree(pvt);
}
pvt->tmpgroup = strdup(name);
add_group_to_list(pvt, name, strlen(name));
reset:
pvt->cur = pvt->tmp;
}
static void
ng_minimize(struct irs_ng *this) {
UNUSED(this);
/* NOOP */
}
/* Private */
static void
add_group_to_list(struct pvt *pvt, const char *name, int len) {
char *vdata, *cp, *np;
struct tmpgrp *tmp;
int vlen, r;
char *nametmp;
/* Don't add the same group to the list more than once. */
for (tmp = pvt->tmp; tmp; tmp = tmp->next)
if (!strcmp(tmp->name, name))
return;
DE_CONST(name, nametmp);
r = yp_match(pvt->nis_domain, netgroup_map, nametmp, len,
&vdata, &vlen);
if (r == 0) {
cp = vdata;
if (*cp && cp[strlen(cp)-1] == '\n')
cp[strlen(cp)-1] = '\0';
for ( ; cp; cp = np) {
np = strchr(cp, ' ');
if (np)
*np++ = '\0';
if (*cp == '(')
add_tuple_to_list(pvt, name, cp);
else
add_group_to_list(pvt, cp, strlen(cp));
}
free(vdata);
}
}
static void
add_tuple_to_list(struct pvt *pvt, const char *name, char *cp) {
struct tmpgrp *tmp;
char *tp, *np;
INSIST(*cp++ == '(');
tmp = malloc(sizeof *tmp + strlen(name) + sizeof '\0' +
strlen(cp) - sizeof ')');
if (!tmp)
return;
memset(tmp, 0, sizeof *tmp);
tp = ((char *)tmp) + sizeof *tmp;
/* Name */
strcpy(tp, name);
tmp->name = tp;
tp += strlen(tp) + 1;
/* Host */
if (!(np = strchr(cp, ',')))
goto cleanup;
*np++ = '\0';
strcpy(tp, cp);
tmp->host = tp;
tp += strlen(tp) + 1;
cp = np;
/* User */
if (!(np = strchr(cp, ',')))
goto cleanup;
*np++ = '\0';
strcpy(tp, cp);
tmp->user = tp;
tp += strlen(tp) + 1;
cp = np;
/* Domain */
if (!(np = strchr(cp, ')')))
goto cleanup;
*np++ = '\0';
strcpy(tp, cp);
tmp->domain = tp;
/*
* Empty string in file means wildcard, but
* NULL string in return value means wildcard.
*/
if (!*tmp->host)
tmp->host = NULL;
if (!*tmp->user)
tmp->user = NULL;
if (!*tmp->domain)
tmp->domain = NULL;
/* Add to list (LIFO). */
tmp->next = pvt->tmp;
pvt->tmp = tmp;
return;
cleanup:
free(tmp);
}
static void
tmpfree(struct pvt *pvt) {
struct tmpgrp *cur, *next;
if (pvt->tmpgroup) {
free(pvt->tmpgroup);
pvt->tmpgroup = NULL;
}
for (cur = pvt->tmp; cur; cur = next) {
next = cur->next;
free(cur);
}
pvt->tmp = NULL;
}
#endif /*WANT_IRS_NIS*/