307 lines
6.8 KiB
C
307 lines
6.8 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_nw.c,v 1.10 1997/12/04 04:58:00 halley 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/inet.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 <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 <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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#define MAXALIASES 35
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#define MAXADDRSIZE 4
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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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struct nwent nwent;
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char * nwbuf;
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char * aliases[MAXALIASES + 1];
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u_char addr[MAXADDRSIZE];
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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 networks_byname[] = "networks.byname";
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static /*const*/ char networks_byaddr[] = "networks.byaddr";
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/* Forward */
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static void nw_close(struct irs_nw *);
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static struct nwent * nw_byname(struct irs_nw *, const char *, int);
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static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int);
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static struct nwent * nw_next(struct irs_nw *);
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static void nw_rewind(struct irs_nw *);
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static void nw_minimize(struct irs_nw *);
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static struct nwent * makenwent(struct irs_nw *this);
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static void nisfree(struct pvt *, enum do_what);
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/* Public */
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struct irs_nw *
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irs_nis_nw(struct irs_acc *this) {
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struct irs_nw *nw;
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struct pvt *pvt;
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if (!(nw = (struct irs_nw *)malloc(sizeof *nw))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(nw, 0x5e, sizeof *nw);
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if (!(pvt = (struct pvt *)malloc(sizeof *pvt))) {
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free(nw);
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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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nw->private = pvt;
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nw->close = nw_close;
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nw->byname = nw_byname;
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nw->byaddr = nw_byaddr;
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nw->next = nw_next;
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nw->rewind = nw_rewind;
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nw->minimize = nw_minimize;
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return (nw);
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}
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/* Methods */
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static void
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nw_close(struct irs_nw *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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if (pvt->nwbuf)
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free(pvt->nwbuf);
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free(pvt);
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free(this);
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}
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static struct nwent *
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nw_byaddr(struct irs_nw *this, void *net, int length, int af) {
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struct pvt *pvt = (struct pvt *)this->private;
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char tmp[sizeof "255.255.255.255/32"], *t;
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int r;
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if (af != AF_INET) {
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h_errno = NETDB_INTERNAL;
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errno = EAFNOSUPPORT;
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return (NULL);
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}
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nisfree(pvt, do_val);
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/* Try it with /CIDR first. */
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if (inet_net_ntop(AF_INET, net, length, tmp, sizeof tmp) == NULL) {
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h_errno = NETDB_INTERNAL;
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return (NULL);
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}
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r = yp_match(pvt->nis_domain, networks_byaddr, tmp, strlen(tmp),
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&pvt->curval_data, &pvt->curval_len);
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if (r != 0) {
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/* Give it a shot without the /CIDR. */
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if ((t = strchr(tmp, '/')) != NULL) {
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*t = '\0';
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r = yp_match(pvt->nis_domain, networks_byaddr,
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tmp, strlen(tmp),
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&pvt->curval_data, &pvt->curval_len);
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}
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if (r != 0) {
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h_errno = HOST_NOT_FOUND;
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return (NULL);
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}
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}
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return (makenwent(this));
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}
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static struct nwent *
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nw_byname(struct irs_nw *this, const char *name, int af) {
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struct pvt *pvt = (struct pvt *)this->private;
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int r;
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if (af != AF_INET) {
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h_errno = NETDB_INTERNAL;
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errno = EAFNOSUPPORT;
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return (NULL);
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}
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nisfree(pvt, do_val);
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r = yp_match(pvt->nis_domain, networks_byname, (char *)name,
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strlen(name), &pvt->curval_data, &pvt->curval_len);
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if (r != 0) {
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h_errno = HOST_NOT_FOUND;
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return (NULL);
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}
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return (makenwent(this));
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}
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static void
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nw_rewind(struct irs_nw *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 nwent *
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nw_next(struct irs_nw *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct nwent *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, networks_byaddr,
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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, networks_byaddr,
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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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h_errno = HOST_NOT_FOUND;
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return (NULL);
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}
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rval = makenwent(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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nw_minimize(struct irs_nw *this) {
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/* NOOP */
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}
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/* Private */
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static struct nwent *
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makenwent(struct irs_nw *this) {
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static const char spaces[] = " \t";
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struct pvt *pvt = (struct pvt *)this->private;
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char *t, *cp, **ap;
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if (pvt->nwbuf)
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free(pvt->nwbuf);
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pvt->nwbuf = pvt->curval_data;
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pvt->curval_data = NULL;
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if ((cp = strchr(pvt->nwbuf, '#')) != NULL)
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*cp = '\0';
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cp = pvt->nwbuf;
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/* Name */
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pvt->nwent.n_name = cp;
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cp += strcspn(cp, spaces);
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if (!*cp)
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goto cleanup;
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*cp++ = '\0';
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cp += strspn(cp, spaces);
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/* Network */
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pvt->nwent.n_addrtype = AF_INET;
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t = cp + strcspn(cp, spaces);
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if (*t)
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*t++ = '\0';
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pvt->nwent.n_length = inet_net_pton(AF_INET, cp,
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pvt->addr, sizeof pvt->addr);
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if (pvt->nwent.n_length < 0)
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goto cleanup;
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pvt->nwent.n_addr = pvt->addr;
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cp = t;
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/* Aliases */
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ap = pvt->nwent.n_aliases = pvt->aliases;
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while (*cp) {
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if (ap >= &pvt->aliases[MAXALIASES])
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break;
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*ap++ = cp;
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cp += strcspn(cp, spaces);
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if (!*cp)
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break;
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*cp++ = '\0';
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cp += strspn(cp, spaces);
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}
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*ap = NULL;
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return (&pvt->nwent);
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cleanup:
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if (pvt->nwbuf) {
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free(pvt->nwbuf);
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pvt->nwbuf = 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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