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

382 lines
8.5 KiB
C

/* $NetBSD: nis_nw.c,v 1.1.1.1 1999/11/20 18:54:10 veego 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_nw.c,v 1.15 1999/01/18 07:46:58 vixie Exp";
#endif /* LIBC_SCCS and not lint */
/* Imports */
#include "port_before.h"
#ifndef WANT_IRS_NIS
static int __bind_irs_nis_unneeded;
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <errno.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <isc/memcluster.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "nis_p.h"
/* Definitions */
#define MAXALIASES 35
#define MAXADDRSIZE 4
struct pvt {
int needrewind;
char * nis_domain;
char * curkey_data;
int curkey_len;
char * curval_data;
int curval_len;
struct nwent nwent;
char * nwbuf;
char * aliases[MAXALIASES + 1];
u_char addr[MAXADDRSIZE];
struct __res_state * res;
void (*free_res)(void *);
};
enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
static /*const*/ char networks_byname[] = "networks.byname";
static /*const*/ char networks_byaddr[] = "networks.byaddr";
/* Forward */
static void nw_close(struct irs_nw *);
static struct nwent * nw_byname(struct irs_nw *, const char *, int);
static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int);
static struct nwent * nw_next(struct irs_nw *);
static void nw_rewind(struct irs_nw *);
static void nw_minimize(struct irs_nw *);
static struct __res_state * nw_res_get(struct irs_nw *this);
static void nw_res_set(struct irs_nw *this,
struct __res_state *res,
void (*free_res)(void *));
static struct nwent * makenwent(struct irs_nw *this);
static void nisfree(struct pvt *, enum do_what);
static int init(struct irs_nw *this);
/* Public */
struct irs_nw *
irs_nis_nw(struct irs_acc *this) {
struct irs_nw *nw;
struct pvt *pvt;
if (!(pvt = memget(sizeof *pvt))) {
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
if (!(nw = memget(sizeof *nw))) {
memput(pvt, sizeof *pvt);
errno = ENOMEM;
return (NULL);
}
memset(nw, 0x5e, sizeof *nw);
pvt->needrewind = 1;
pvt->nis_domain = ((struct nis_p *)this->private)->domain;
nw->private = pvt;
nw->close = nw_close;
nw->byname = nw_byname;
nw->byaddr = nw_byaddr;
nw->next = nw_next;
nw->rewind = nw_rewind;
nw->minimize = nw_minimize;
nw->res_get = nw_res_get;
nw->res_set = nw_res_set;
return (nw);
}
/* Methods */
static void
nw_close(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
nw_minimize(this);
if (pvt->res && pvt->free_res)
(*pvt->free_res)(pvt->res);
if (pvt->nwbuf)
free(pvt->nwbuf);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct nwent *
nw_byaddr(struct irs_nw *this, void *net, int length, int af) {
struct pvt *pvt = (struct pvt *)this->private;
char tmp[sizeof "255.255.255.255/32"], *t;
int r;
if (init(this) == -1)
return (NULL);
if (af != AF_INET) {
RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
errno = EAFNOSUPPORT;
return (NULL);
}
nisfree(pvt, do_val);
/* Try it with /CIDR first. */
if (inet_net_ntop(AF_INET, net, length, tmp, sizeof tmp) == NULL) {
RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
return (NULL);
}
r = yp_match(pvt->nis_domain, networks_byaddr, tmp, strlen(tmp),
&pvt->curval_data, &pvt->curval_len);
if (r != 0) {
/* Give it a shot without the /CIDR. */
if ((t = strchr(tmp, '/')) != NULL) {
*t = '\0';
r = yp_match(pvt->nis_domain, networks_byaddr,
tmp, strlen(tmp),
&pvt->curval_data, &pvt->curval_len);
}
if (r != 0) {
RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
return (NULL);
}
}
return (makenwent(this));
}
static struct nwent *
nw_byname(struct irs_nw *this, const char *name, int af) {
struct pvt *pvt = (struct pvt *)this->private;
int r;
if (init(this) == -1)
return (NULL);
if (af != AF_INET) {
RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
errno = EAFNOSUPPORT;
return (NULL);
}
nisfree(pvt, do_val);
r = yp_match(pvt->nis_domain, networks_byname, (char *)name,
strlen(name), &pvt->curval_data, &pvt->curval_len);
if (r != 0) {
RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
return (NULL);
}
return (makenwent(this));
}
static void
nw_rewind(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
pvt->needrewind = 1;
}
static struct nwent *
nw_next(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct nwent *rval;
int r;
if (init(this) == -1)
return (NULL);
do {
if (pvt->needrewind) {
nisfree(pvt, do_all);
r = yp_first(pvt->nis_domain, networks_byaddr,
&pvt->curkey_data, &pvt->curkey_len,
&pvt->curval_data, &pvt->curval_len);
pvt->needrewind = 0;
} else {
char *newkey_data;
int newkey_len;
nisfree(pvt, do_val);
r = yp_next(pvt->nis_domain, networks_byaddr,
pvt->curkey_data, pvt->curkey_len,
&newkey_data, &newkey_len,
&pvt->curval_data, &pvt->curval_len);
nisfree(pvt, do_key);
pvt->curkey_data = newkey_data;
pvt->curkey_len = newkey_len;
}
if (r != 0) {
RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
return (NULL);
}
rval = makenwent(this);
} while (rval == NULL);
return (rval);
}
static void
nw_minimize(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (pvt->res)
res_nclose(pvt->res);
}
static struct __res_state *
nw_res_get(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (!pvt->res) {
struct __res_state *res;
res = (struct __res_state *)malloc(sizeof *res);
if (!res) {
errno = ENOMEM;
return (NULL);
}
memset(res, 0, sizeof *res);
nw_res_set(this, res, free);
}
return (pvt->res);
}
static void
nw_res_set(struct irs_nw *this, struct __res_state *res,
void (*free_res)(void *)) {
struct pvt *pvt = (struct pvt *)this->private;
if (pvt->res && pvt->free_res) {
res_nclose(pvt->res);
(*pvt->free_res)(pvt->res);
}
pvt->res = res;
pvt->free_res = free_res;
}
/* Private */
static struct nwent *
makenwent(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
static const char spaces[] = " \t";
char *t, *cp, **ap;
if (pvt->nwbuf)
free(pvt->nwbuf);
pvt->nwbuf = pvt->curval_data;
pvt->curval_data = NULL;
if ((cp = strpbrk(pvt->nwbuf, "#\n")) != NULL)
*cp = '\0';
cp = pvt->nwbuf;
/* Name */
pvt->nwent.n_name = cp;
cp += strcspn(cp, spaces);
if (!*cp)
goto cleanup;
*cp++ = '\0';
cp += strspn(cp, spaces);
/* Network */
pvt->nwent.n_addrtype = AF_INET;
t = cp + strcspn(cp, spaces);
if (*t)
*t++ = '\0';
pvt->nwent.n_length = inet_net_pton(AF_INET, cp,
pvt->addr, sizeof pvt->addr);
if (pvt->nwent.n_length < 0)
goto cleanup;
pvt->nwent.n_addr = pvt->addr;
cp = t;
/* Aliases */
ap = pvt->nwent.n_aliases = pvt->aliases;
while (*cp) {
if (ap >= &pvt->aliases[MAXALIASES])
break;
*ap++ = cp;
cp += strcspn(cp, spaces);
if (!*cp)
break;
*cp++ = '\0';
cp += strspn(cp, spaces);
}
*ap = NULL;
return (&pvt->nwent);
cleanup:
if (pvt->nwbuf) {
free(pvt->nwbuf);
pvt->nwbuf = NULL;
}
return (NULL);
}
static void
nisfree(struct pvt *pvt, enum do_what do_what) {
if ((do_what & do_key) && pvt->curkey_data) {
free(pvt->curkey_data);
pvt->curkey_data = NULL;
}
if ((do_what & do_val) && pvt->curval_data) {
free(pvt->curval_data);
pvt->curval_data = NULL;
}
}
static int
init(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (!pvt->res && !nw_res_get(this))
return (-1);
if (((pvt->res->options & RES_INIT) == 0) &&
res_ninit(pvt->res) == -1)
return (-1);
return (0);
}
#endif /*WANT_IRS_NIS*/