6b6ac9438f
package does have BXA export approval, but the licensing strings on the dnssafe code are a bit unpleasant. The crypto is easy to restore and bind will run without it - just without full dnssec support. Obtained from: The Internet Software Consortium (www.isc.org)
305 lines
6.6 KiB
C
305 lines
6.6 KiB
C
/*
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* Copyright (c) 1996,1999 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_sv.c,v 1.14 1999/01/18 07:46:59 vixie Exp $";
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#endif /* LIBC_SCCS and not lint */
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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 <arpa/nameser.h>
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#include <resolv.h>
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#include <sys/socket.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 <ctype.h>
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#include <errno.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 <isc/memcluster.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 pvt {
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int needrewind;
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char * nis_domain;
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char * curkey_data;
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int curkey_len;
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char * curval_data;
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int curval_len;
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char line[BUFSIZ+1];
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struct servent serv;
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char * svbuf;
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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 services_byname[] = "services.byname";
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/* Forward */
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static void sv_close(struct irs_sv*);
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static struct servent * sv_next(struct irs_sv *);
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static struct servent * sv_byname(struct irs_sv *, const char *,
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const char *);
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static struct servent * sv_byport(struct irs_sv *, int, const char *);
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static void sv_rewind(struct irs_sv *);
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static void sv_minimize(struct irs_sv *);
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static struct servent * makeservent(struct irs_sv *this);
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static void nisfree(struct pvt *, enum do_what);
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/* Public */
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struct irs_sv *
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irs_nis_sv(struct irs_acc *this) {
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struct irs_sv *sv;
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struct pvt *pvt;
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if (!(sv = memget(sizeof *sv))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(sv, 0x5e, sizeof *sv);
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if (!(pvt = memget(sizeof *pvt))) {
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memput(sv, sizeof *sv);
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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->needrewind = 1;
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pvt->nis_domain = ((struct nis_p *)this->private)->domain;
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sv->private = pvt;
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sv->close = sv_close;
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sv->next = sv_next;
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sv->byname = sv_byname;
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sv->byport = sv_byport;
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sv->rewind = sv_rewind;
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sv->minimize = sv_minimize;
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sv->res_get = NULL;
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sv->res_set = NULL;
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return (sv);
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}
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/* Methods */
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static void
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sv_close(struct irs_sv *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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nisfree(pvt, do_all);
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if (pvt->serv.s_aliases)
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free(pvt->serv.s_aliases);
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if (pvt->svbuf)
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free(pvt->svbuf);
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memput(pvt, sizeof *pvt);
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memput(this, sizeof *this);
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}
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static struct servent *
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sv_byname(struct irs_sv *this, const char *name, const char *proto) {
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struct servent *serv;
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char **sap;
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sv_rewind(this);
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while ((serv = sv_next(this)) != NULL) {
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if (proto != NULL && strcmp(proto, serv->s_proto))
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continue;
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if (!strcmp(name, serv->s_name))
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break;
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for (sap = serv->s_aliases; sap && *sap; sap++)
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if (!strcmp(name, *sap))
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break;
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}
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return (serv);
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}
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static struct servent *
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sv_byport(struct irs_sv *this, int port, const char *proto) {
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struct servent *serv;
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sv_rewind(this);
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while ((serv = sv_next(this)) != NULL) {
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if (proto != NULL && strcmp(proto, serv->s_proto))
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continue;
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if (serv->s_port == port)
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break;
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}
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return (serv);
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}
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static void
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sv_rewind(struct irs_sv *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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pvt->needrewind = 1;
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}
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static struct servent *
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sv_next(struct irs_sv *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct servent *rval;
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int r;
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do {
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if (pvt->needrewind) {
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nisfree(pvt, do_all);
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r = yp_first(pvt->nis_domain, services_byname,
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&pvt->curkey_data, &pvt->curkey_len,
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&pvt->curval_data, &pvt->curval_len);
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pvt->needrewind = 0;
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} else {
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char *newkey_data;
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int newkey_len;
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nisfree(pvt, do_val);
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r = yp_next(pvt->nis_domain, services_byname,
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pvt->curkey_data, pvt->curkey_len,
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&newkey_data, &newkey_len,
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&pvt->curval_data, &pvt->curval_len);
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nisfree(pvt, do_key);
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pvt->curkey_data = newkey_data;
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pvt->curkey_len = newkey_len;
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}
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if (r != 0) {
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errno = ENOENT;
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return (NULL);
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}
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rval = makeservent(this);
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} while (rval == NULL);
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return (rval);
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}
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static void
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sv_minimize(struct irs_sv *this) {
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/* NOOP */
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}
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/* Private */
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static struct servent *
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makeservent(struct irs_sv *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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static const char spaces[] = " \t";
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char *p, **t;
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int n, m;
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if (pvt->svbuf)
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free(pvt->svbuf);
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pvt->svbuf = pvt->curval_data;
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pvt->curval_data = NULL;
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if (pvt->serv.s_aliases) {
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free(pvt->serv.s_aliases);
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pvt->serv.s_aliases = NULL;
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}
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if ((p = strpbrk(pvt->svbuf, "#\n")))
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*p = '\0';
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p = pvt->svbuf;
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pvt->serv.s_name = p;
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p += strcspn(p, spaces);
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if (!*p)
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goto cleanup;
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*p++ = '\0';
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p += strspn(p, spaces);
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pvt->serv.s_port = htons((u_short) atoi(p));
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pvt->serv.s_proto = NULL;
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while (*p && !isspace(*p))
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if (*p++ == '/')
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pvt->serv.s_proto = p;
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if (!pvt->serv.s_proto)
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goto cleanup;
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if (*p) {
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*p++ = '\0';
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p += strspn(p, spaces);
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}
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n = m = 0;
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while (*p) {
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if ((n + 1) >= m || !pvt->serv.s_aliases) {
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m += 10;
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t = realloc(pvt->serv.s_aliases, m * sizeof(char *));
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if (!t) {
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errno = ENOMEM;
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goto cleanup;
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}
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pvt->serv.s_aliases = t;
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}
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pvt->serv.s_aliases[n++] = p;
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p += strcspn(p, spaces);
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if (!*p)
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break;
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*p++ = '\0';
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p += strspn(p, spaces);
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}
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if (!pvt->serv.s_aliases)
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pvt->serv.s_aliases = malloc(sizeof(char *));
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if (!pvt->serv.s_aliases)
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goto cleanup;
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pvt->serv.s_aliases[n] = NULL;
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return (&pvt->serv);
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cleanup:
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if (pvt->serv.s_aliases) {
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free(pvt->serv.s_aliases);
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pvt->serv.s_aliases = NULL;
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}
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if (pvt->svbuf) {
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free(pvt->svbuf);
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pvt->svbuf = NULL;
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}
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return (NULL);
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}
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static void
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nisfree(struct pvt *pvt, enum do_what do_what) {
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if ((do_what & do_key) && pvt->curkey_data) {
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free(pvt->curkey_data);
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pvt->curkey_data = NULL;
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}
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if ((do_what & do_val) && pvt->curval_data) {
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free(pvt->curval_data);
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pvt->curval_data = NULL;
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}
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}
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#endif /*WANT_IRS_NIS*/
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