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

297 lines
6.6 KiB
C

/* $NetBSD: nis_pr.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_pr.c,v 1.13 1999/01/18 07:46:59 vixie 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 <arpa/nameser.h>
#include <resolv.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <ctype.h>
#include <stdlib.h>
#include <errno.h>
#include <isc/memcluster.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "nis_p.h"
/* Definitions */
struct pvt {
int needrewind;
char * nis_domain;
char * curkey_data;
int curkey_len;
char * curval_data;
int curval_len;
struct protoent proto;
char * prbuf;
};
enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
static /*const*/ char protocols_byname[] = "protocols.byname";
static /*const*/ char protocols_bynumber[] = "protocols.bynumber";
/* Forward */
static void pr_close(struct irs_pr *);
static struct protoent * pr_byname(struct irs_pr *, const char *);
static struct protoent * pr_bynumber(struct irs_pr *, int);
static struct protoent * pr_next(struct irs_pr *);
static void pr_rewind(struct irs_pr *);
static void pr_minimize(struct irs_pr *);
static struct protoent * makeprotoent(struct irs_pr *this);
static void nisfree(struct pvt *, enum do_what);
/* Public */
struct irs_pr *
irs_nis_pr(struct irs_acc *this) {
struct irs_pr *pr;
struct pvt *pvt;
if (!(pr = memget(sizeof *pr))) {
errno = ENOMEM;
return (NULL);
}
memset(pr, 0x5e, sizeof *pr);
if (!(pvt = memget(sizeof *pvt))) {
memput(pr, sizeof *pr);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->needrewind = 1;
pvt->nis_domain = ((struct nis_p *)this->private)->domain;
pr->private = pvt;
pr->byname = pr_byname;
pr->bynumber = pr_bynumber;
pr->next = pr_next;
pr->rewind = pr_rewind;
pr->close = pr_close;
pr->minimize = pr_minimize;
pr->res_get = NULL;
pr->res_set = NULL;
return (pr);
}
/* Methods. */
static void
pr_close(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
nisfree(pvt, do_all);
if (pvt->proto.p_aliases)
free(pvt->proto.p_aliases);
if (pvt->prbuf)
free(pvt->prbuf);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct protoent *
pr_byname(struct irs_pr *this, const char *name) {
struct pvt *pvt = (struct pvt *)this->private;
int r;
nisfree(pvt, do_val);
r = yp_match(pvt->nis_domain, protocols_byname, (char *)name,
strlen(name), &pvt->curval_data, &pvt->curval_len);
if (r != 0) {
errno = ENOENT;
return (NULL);
}
return (makeprotoent(this));
}
static struct protoent *
pr_bynumber(struct irs_pr *this, int num) {
struct pvt *pvt = (struct pvt *)this->private;
char tmp[sizeof "-4294967295"];
int r;
nisfree(pvt, do_val);
(void) sprintf(tmp, "%d", num);
r = yp_match(pvt->nis_domain, protocols_bynumber, tmp, strlen(tmp),
&pvt->curval_data, &pvt->curval_len);
if (r != 0) {
errno = ENOENT;
return (NULL);
}
return (makeprotoent(this));
}
static struct protoent *
pr_next(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct protoent *rval;
int r;
do {
if (pvt->needrewind) {
nisfree(pvt, do_all);
r = yp_first(pvt->nis_domain, protocols_bynumber,
&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, protocols_bynumber,
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) {
errno = ENOENT;
return (NULL);
}
rval = makeprotoent(this);
} while (rval == NULL);
return (rval);
}
static void
pr_rewind(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
pvt->needrewind = 1;
}
static void
pr_minimize(struct irs_pr *this) {
/* NOOP */
}
/* Private */
static struct protoent *
makeprotoent(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
char *p, **t;
int n, m;
if (pvt->prbuf)
free(pvt->prbuf);
pvt->prbuf = pvt->curval_data;
pvt->curval_data = NULL;
for (p = pvt->prbuf; *p && *p != '#'; p++)
NULL;
while (p > pvt->prbuf && isspace(p[-1]))
p--;
*p = '\0';
p = pvt->prbuf;
n = m = 0;
pvt->proto.p_name = p;
while (*p && !isspace(*p))
p++;
if (!*p)
return (NULL);
*p++ = '\0';
while (*p && isspace(*p))
p++;
pvt->proto.p_proto = atoi(p);
while (*p && !isspace(*p))
p++;
*p++ = '\0';
while (*p) {
if ((n + 1) >= m || !pvt->proto.p_aliases) {
m += 10;
t = realloc(pvt->proto.p_aliases,
m * sizeof(char *));
if (!t) {
errno = ENOMEM;
goto cleanup;
}
pvt->proto.p_aliases = t;
}
pvt->proto.p_aliases[n++] = p;
while (*p && !isspace(*p))
p++;
if (*p)
*p++ = '\0';
}
if (!pvt->proto.p_aliases)
pvt->proto.p_aliases = malloc(sizeof(char *));
if (!pvt->proto.p_aliases)
goto cleanup;
pvt->proto.p_aliases[n] = NULL;
return (&pvt->proto);
cleanup:
if (pvt->proto.p_aliases) {
free(pvt->proto.p_aliases);
pvt->proto.p_aliases = NULL;
}
if (pvt->prbuf) {
free(pvt->prbuf);
pvt->prbuf = 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;
}
}
#endif /*WANT_IRS_NIS*/