290 lines
6.2 KiB
C
290 lines
6.2 KiB
C
/*
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* Copyright (c) 1996 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$Id: nis_ng.c,v 1.10 1997/12/04 04:58:00 halley Exp $";
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#endif
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/* Imports */
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#include "port_before.h"
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#ifndef WANT_IRS_NIS
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static int __bind_irs_nis_unneeded;
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#else
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <rpc/rpc.h>
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#include <rpc/xdr.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <irs.h>
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#include "port_after.h"
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#include "irs_p.h"
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#include "nis_p.h"
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/* Definitions */
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struct tmpgrp {
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const char * name;
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const char * host;
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const char * user;
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const char * domain;
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struct tmpgrp * next;
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};
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struct pvt {
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char * nis_domain;
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struct tmpgrp * tmp;
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struct tmpgrp * cur;
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char * tmpgroup;
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};
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enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
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static /*const*/ char netgroup_map[] = "netgroup";
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/* Forward */
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static void ng_close(struct irs_ng *);
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static int ng_next(struct irs_ng *, char **, char **, char **);
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static int ng_test(struct irs_ng *,
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const char *, const char *,
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const char *, const char *);
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static void ng_rewind(struct irs_ng *, const char *);
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static void ng_minimize(struct irs_ng *);
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static void add_group_to_list(struct pvt *, const char *, int);
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static void add_tuple_to_list(struct pvt *, const char *, char *);
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static void tmpfree(struct pvt *);
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/* Public */
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struct irs_ng *
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irs_nis_ng(struct irs_acc *this) {
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struct irs_ng *ng;
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struct pvt *pvt;
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if (!(ng = malloc(sizeof *ng))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(ng, 0x5e, sizeof *ng);
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if (!(pvt = (struct pvt *)malloc(sizeof *pvt))) {
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free(ng);
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errno = ENOMEM;
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return (NULL);
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}
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memset(pvt, 0, sizeof *pvt);
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pvt->nis_domain = ((struct nis_p *)this->private)->domain;
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ng->private = pvt;
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ng->close = ng_close;
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ng->next = ng_next;
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ng->test = ng_test;
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ng->rewind = ng_rewind;
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ng->minimize = ng_minimize;
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return (ng);
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}
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/* Methods */
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static void
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ng_close(struct irs_ng *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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tmpfree(pvt);
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free(pvt);
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free(this);
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}
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static int
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ng_next(struct irs_ng *this, char **host, char **user, char **domain) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct netgrp *rval;
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if (!pvt->cur)
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return (0);
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*host = (/*const*/ char *)pvt->cur->host;
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*user = (/*const*/ char *)pvt->cur->user;
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*domain = (/*const*/ char *)pvt->cur->domain;
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pvt->cur = pvt->cur->next;
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return (1);
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}
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static int
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ng_test(struct irs_ng *this, const char *name,
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const char *host, const char *user, const char *domain)
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{
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struct pvt *pvt = (struct pvt *)this->private;
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struct tmpgrp *cur;
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tmpfree(pvt);
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add_group_to_list(pvt, name, strlen(name));
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for (cur = pvt->tmp; cur; cur = cur->next) {
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if ((!host || !cur->host || !strcmp(host, cur->host)) &&
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(!user || !cur->user || !strcmp(user, cur->user)) &&
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(!domain || !cur->domain || !strcmp(domain, cur->domain)))
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break;
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}
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tmpfree(pvt);
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return ((cur == NULL) ? 0 : 1);
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}
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static void
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ng_rewind(struct irs_ng *this, const char *name) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct netgrp *rval;
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/* Either hand back or free the existing list. */
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if (pvt->tmpgroup) {
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if (pvt->tmp && !strcmp(pvt->tmpgroup, name))
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goto reset;
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tmpfree(pvt);
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}
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pvt->tmpgroup = strdup(name);
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add_group_to_list(pvt, name, strlen(name));
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reset:
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pvt->cur = pvt->tmp;
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}
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static void
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ng_minimize(struct irs_ng *this) {
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/* NOOP */
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}
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/* Private */
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static void
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add_group_to_list(struct pvt *pvt, const char *name, int len) {
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char *vdata, *cp, *np;
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struct tmpgrp *tmp;
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int vlen, r;
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/* Don't add the same group to the list more than once. */
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for (tmp = pvt->tmp; tmp; tmp = tmp->next)
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if (!strcmp(tmp->name, name))
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return;
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r = yp_match(pvt->nis_domain, netgroup_map, (char *)name, len,
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&vdata, &vlen);
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if (r == 0) {
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for (cp = vdata; cp; cp = np) {
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np = strchr(cp, ' ');
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if (np)
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*np++ = '\0';
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if (*cp == '(')
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add_tuple_to_list(pvt, name, cp);
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else
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add_group_to_list(pvt, cp, strlen(cp));
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}
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free(vdata);
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}
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}
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static void
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add_tuple_to_list(struct pvt *pvt, const char *name, char *cp) {
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struct tmpgrp *tmp;
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char *tp, *np;
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assert(*cp++ == '(');
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tmp = malloc(sizeof *tmp + strlen(name) + sizeof '\0' +
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strlen(cp) - sizeof ')');
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if (!tmp)
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return;
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memset(tmp, 0, sizeof *tmp);
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tp = ((char *)tmp) + sizeof *tmp;
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/* Name */
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strcpy(tp, name);
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tmp->name = tp;
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tp += strlen(tp) + 1;
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/* Host */
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if (!(np = strchr(cp, ',')))
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goto cleanup;
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*np++ = '\0';
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strcpy(tp, cp);
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tmp->host = tp;
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tp += strlen(tp) + 1;
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cp = np;
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/* User */
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if (!(np = strchr(cp, ',')))
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goto cleanup;
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*np++ = '\0';
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strcpy(tp, cp);
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tmp->user = tp;
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tp += strlen(tp) + 1;
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cp = np;
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/* Domain */
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if (!(np = strchr(cp, ')')))
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goto cleanup;
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*np++ = '\0';
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strcpy(tp, cp);
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tmp->domain = tp;
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/*
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* Empty string in file means wildcard, but
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* NULL string in return value means wildcard.
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*/
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if (!*tmp->host)
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tmp->host = NULL;
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if (!*tmp->user)
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tmp->user = NULL;
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if (!*tmp->domain)
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tmp->domain = NULL;
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/* Add to list (LIFO). */
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tmp->next = pvt->tmp;
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pvt->tmp = tmp;
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return;
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cleanup:
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free(tmp);
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}
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static void
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tmpfree(struct pvt *pvt) {
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struct tmpgrp *cur, *next;
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if (pvt->tmpgroup) {
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free(pvt->tmpgroup);
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pvt->tmpgroup = NULL;
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}
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for (cur = pvt->tmp; cur; cur = next) {
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next = cur->next;
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free(cur);
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}
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pvt->tmp = NULL;
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}
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#endif /*WANT_IRS_NIS*/
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