freebsd-dev/contrib/bind/lib/irs/nis_sv.c
Peter Wemm 6b6ac9438f Import bind v8.2.2.p5, minus the crypto for the time being. The bind
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)
1999-11-30 02:43:11 +00:00

305 lines
6.6 KiB
C

/*
* 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_sv.c,v 1.14 1999/01/18 07:46:59 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 <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <ctype.h>
#include <errno.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 */
struct pvt {
int needrewind;
char * nis_domain;
char * curkey_data;
int curkey_len;
char * curval_data;
int curval_len;
char line[BUFSIZ+1];
struct servent serv;
char * svbuf;
};
enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
static /*const*/ char services_byname[] = "services.byname";
/* Forward */
static void sv_close(struct irs_sv*);
static struct servent * sv_next(struct irs_sv *);
static struct servent * sv_byname(struct irs_sv *, const char *,
const char *);
static struct servent * sv_byport(struct irs_sv *, int, const char *);
static void sv_rewind(struct irs_sv *);
static void sv_minimize(struct irs_sv *);
static struct servent * makeservent(struct irs_sv *this);
static void nisfree(struct pvt *, enum do_what);
/* Public */
struct irs_sv *
irs_nis_sv(struct irs_acc *this) {
struct irs_sv *sv;
struct pvt *pvt;
if (!(sv = memget(sizeof *sv))) {
errno = ENOMEM;
return (NULL);
}
memset(sv, 0x5e, sizeof *sv);
if (!(pvt = memget(sizeof *pvt))) {
memput(sv, sizeof *sv);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->needrewind = 1;
pvt->nis_domain = ((struct nis_p *)this->private)->domain;
sv->private = pvt;
sv->close = sv_close;
sv->next = sv_next;
sv->byname = sv_byname;
sv->byport = sv_byport;
sv->rewind = sv_rewind;
sv->minimize = sv_minimize;
sv->res_get = NULL;
sv->res_set = NULL;
return (sv);
}
/* Methods */
static void
sv_close(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
nisfree(pvt, do_all);
if (pvt->serv.s_aliases)
free(pvt->serv.s_aliases);
if (pvt->svbuf)
free(pvt->svbuf);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct servent *
sv_byname(struct irs_sv *this, const char *name, const char *proto) {
struct servent *serv;
char **sap;
sv_rewind(this);
while ((serv = sv_next(this)) != NULL) {
if (proto != NULL && strcmp(proto, serv->s_proto))
continue;
if (!strcmp(name, serv->s_name))
break;
for (sap = serv->s_aliases; sap && *sap; sap++)
if (!strcmp(name, *sap))
break;
}
return (serv);
}
static struct servent *
sv_byport(struct irs_sv *this, int port, const char *proto) {
struct servent *serv;
sv_rewind(this);
while ((serv = sv_next(this)) != NULL) {
if (proto != NULL && strcmp(proto, serv->s_proto))
continue;
if (serv->s_port == port)
break;
}
return (serv);
}
static void
sv_rewind(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
pvt->needrewind = 1;
}
static struct servent *
sv_next(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct servent *rval;
int r;
do {
if (pvt->needrewind) {
nisfree(pvt, do_all);
r = yp_first(pvt->nis_domain, services_byname,
&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, services_byname,
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 = makeservent(this);
} while (rval == NULL);
return (rval);
}
static void
sv_minimize(struct irs_sv *this) {
/* NOOP */
}
/* Private */
static struct servent *
makeservent(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
static const char spaces[] = " \t";
char *p, **t;
int n, m;
if (pvt->svbuf)
free(pvt->svbuf);
pvt->svbuf = pvt->curval_data;
pvt->curval_data = NULL;
if (pvt->serv.s_aliases) {
free(pvt->serv.s_aliases);
pvt->serv.s_aliases = NULL;
}
if ((p = strpbrk(pvt->svbuf, "#\n")))
*p = '\0';
p = pvt->svbuf;
pvt->serv.s_name = p;
p += strcspn(p, spaces);
if (!*p)
goto cleanup;
*p++ = '\0';
p += strspn(p, spaces);
pvt->serv.s_port = htons((u_short) atoi(p));
pvt->serv.s_proto = NULL;
while (*p && !isspace(*p))
if (*p++ == '/')
pvt->serv.s_proto = p;
if (!pvt->serv.s_proto)
goto cleanup;
if (*p) {
*p++ = '\0';
p += strspn(p, spaces);
}
n = m = 0;
while (*p) {
if ((n + 1) >= m || !pvt->serv.s_aliases) {
m += 10;
t = realloc(pvt->serv.s_aliases, m * sizeof(char *));
if (!t) {
errno = ENOMEM;
goto cleanup;
}
pvt->serv.s_aliases = t;
}
pvt->serv.s_aliases[n++] = p;
p += strcspn(p, spaces);
if (!*p)
break;
*p++ = '\0';
p += strspn(p, spaces);
}
if (!pvt->serv.s_aliases)
pvt->serv.s_aliases = malloc(sizeof(char *));
if (!pvt->serv.s_aliases)
goto cleanup;
pvt->serv.s_aliases[n] = NULL;
return (&pvt->serv);
cleanup:
if (pvt->serv.s_aliases) {
free(pvt->serv.s_aliases);
pvt->serv.s_aliases = NULL;
}
if (pvt->svbuf) {
free(pvt->svbuf);
pvt->svbuf = 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*/