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

435 lines
11 KiB
C

/* $NetBSD: lcl_sv.c,v 1.1.1.1 1999/11/20 18:54:10 veego Exp $ */
/*
* Copyright (c) 1989, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Portions 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: lcl_sv.c,v 1.20 1999/10/07 20:44:03 vixie Exp";
#endif /* LIBC_SCCS and not lint */
/* extern */
#include "port_before.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#ifdef IRS_LCL_SV_DB
#include <db.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <irs.h>
#include <isc/memcluster.h>
#include "port_after.h"
#include "irs_p.h"
#include "lcl_p.h"
#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
#else
# define SPRINTF(x) ((size_t)sprintf x)
#endif
/* Types */
struct pvt {
#ifdef IRS_LCL_SV_DB
DB * dbh;
int dbf;
#endif
struct lcl_sv sv;
};
/* 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 *);
/*global*/ struct servent * irs_lclsv_fnxt(struct lcl_sv *);
#ifdef IRS_LCL_SV_DB
static struct servent * sv_db_rec(struct lcl_sv *, DBT *, DBT *);
#endif
/* Portability */
#ifndef SEEK_SET
# define SEEK_SET 0
#endif
/* Public */
struct irs_sv *
irs_lcl_sv(struct irs_acc *this) {
struct irs_sv *sv;
struct pvt *pvt;
if ((sv = memget(sizeof *sv)) == NULL) {
errno = ENOMEM;
return (NULL);
}
memset(sv, 0x5e, sizeof *sv);
if ((pvt = memget(sizeof *pvt)) == NULL) {
memput(sv, sizeof *sv);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
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;
#ifdef IRS_LCL_SV_DB
pvt->dbf = R_FIRST;
#endif
return (sv);
}
/* Methods */
static void
sv_close(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
#ifdef IRS_LCL_SV_DB
if (pvt->dbh != NULL)
(*pvt->dbh->close)(pvt->dbh);
#endif
if (pvt->sv.fp)
fclose(pvt->sv.fp);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct servent *
sv_byname(struct irs_sv *this, const char *name, const char *proto) {
#ifdef IRS_LCL_SV_DB
struct pvt *pvt = (struct pvt *)this->private;
#endif
struct servent *p;
char **cp;
sv_rewind(this);
#ifdef IRS_LCL_SV_DB
if (pvt->dbh != NULL) {
DBT key, data;
/* Note that (sizeof "/") == 2. */
if ((strlen(name) + sizeof "/" + proto ? strlen(proto) : 0)
> sizeof pvt->sv.line)
goto try_local;
key.data = pvt->sv.line;
key.size = SPRINTF((pvt->sv.line, "%s/%s", name,
proto ? proto : "")) + 1;
if (proto != NULL) {
if ((*pvt->dbh->get)(pvt->dbh, &key, &data, 0) != 0)
return (NULL);
} else if ((*pvt->dbh->seq)(pvt->dbh, &key, &data, R_CURSOR)
!= 0)
return (NULL);
return (sv_db_rec(&pvt->sv, &key, &data));
}
try_local:
#endif
while ((p = sv_next(this))) {
if (strcmp(name, p->s_name) == 0)
goto gotname;
for (cp = p->s_aliases; *cp; cp++)
if (strcmp(name, *cp) == 0)
goto gotname;
continue;
gotname:
if (proto == NULL || strcmp(p->s_proto, proto) == 0)
break;
}
return (p);
}
static struct servent *
sv_byport(struct irs_sv *this, int port, const char *proto) {
#ifdef IRS_LCL_SV_DB
struct pvt *pvt = (struct pvt *)this->private;
#endif
struct servent *p;
sv_rewind(this);
#ifdef IRS_LCL_SV_DB
if (pvt->dbh != NULL) {
DBT key, data;
u_short *ports;
ports = (u_short *)pvt->sv.line;
ports[0] = 0;
ports[1] = port;
key.data = ports;
key.size = sizeof(u_short) * 2;
if (proto && *proto) {
strncpy((char *)ports + key.size, proto,
BUFSIZ - key.size);
key.size += strlen((char *)ports + key.size) + 1;
if ((*pvt->dbh->get)(pvt->dbh, &key, &data, 0) != 0)
return (NULL);
} else {
if ((*pvt->dbh->seq)(pvt->dbh, &key, &data, R_CURSOR)
!= 0)
return (NULL);
}
return (sv_db_rec(&pvt->sv, &key, &data));
}
#endif
while ((p = sv_next(this))) {
if (p->s_port != port)
continue;
if (proto == NULL || strcmp(p->s_proto, proto) == 0)
break;
}
return (p);
}
static void
sv_rewind(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (pvt->sv.fp) {
if (fseek(pvt->sv.fp, 0L, SEEK_SET) == 0)
return;
(void)fclose(pvt->sv.fp);
pvt->sv.fp = NULL;
}
#ifdef IRS_LCL_SV_DB
pvt->dbf = R_FIRST;
if (pvt->dbh != NULL)
return;
pvt->dbh = dbopen(_PATH_SERVICES_DB, O_RDONLY,O_RDONLY,DB_BTREE, NULL);
if (pvt->dbh != NULL) {
if (fcntl((*pvt->dbh->fd)(pvt->dbh), F_SETFD, 1) < 0) {
(*pvt->dbh->close)(pvt->dbh);
pvt->dbh = NULL;
}
return;
}
#endif
if ((pvt->sv.fp = fopen(_PATH_SERVICES, "r")) == NULL)
return;
if (fcntl(fileno(pvt->sv.fp), F_SETFD, 1) < 0) {
(void)fclose(pvt->sv.fp);
pvt->sv.fp = NULL;
}
}
static struct servent *
sv_next(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
#ifdef IRS_LCL_SV_DB
if (pvt->dbh != NULL)
NULL;
else
#endif
if (pvt->sv.fp != NULL)
NULL;
else
sv_rewind(this);
#ifdef IRS_LCL_SV_DB
if (pvt->dbh != NULL) {
DBT key, data;
while ((*pvt->dbh->seq)(pvt->dbh, &key, &data, pvt->dbf) == 0){
pvt->dbf = R_NEXT;
if (((char *)key.data)[0])
continue;
return (sv_db_rec(&pvt->sv, &key, &data));
}
}
#endif
if (pvt->sv.fp == NULL)
return (NULL);
return (irs_lclsv_fnxt(&pvt->sv));
}
static void
sv_minimize(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
#ifdef IRS_LCL_SV_DB
if (pvt->dbh != NULL) {
(*pvt->dbh->close)(pvt->dbh);
pvt->dbh = NULL;
}
#endif
if (pvt->sv.fp != NULL) {
(void)fclose(pvt->sv.fp);
pvt->sv.fp = NULL;
}
}
/* Quasipublic. */
struct servent *
irs_lclsv_fnxt(struct lcl_sv *sv) {
char *p, *cp, **q;
again:
if ((p = fgets(sv->line, BUFSIZ, sv->fp)) == NULL)
return (NULL);
if (*p == '#')
goto again;
sv->serv.s_name = p;
while (*p && *p != '\n' && *p != ' ' && *p != '\t' && *p != '#')
++p;
if (*p == '\0' || *p == '#' || *p == '\n')
goto again;
*p++ = '\0';
while (*p == ' ' || *p == '\t')
p++;
if (*p == '\0' || *p == '#' || *p == '\n')
goto again;
sv->serv.s_port = htons((u_short)strtol(p, &cp, 10));
if (cp == p || (*cp != '/' && *cp != ','))
goto again;
p = cp + 1;
sv->serv.s_proto = p;
q = sv->serv.s_aliases = sv->serv_aliases;
while (*p && *p != '\n' && *p != ' ' && *p != '\t' && *p != '#')
++p;
while (*p == ' ' || *p == '\t') {
*p++ = '\0';
while (*p == ' ' || *p == '\t')
++p;
if (*p == '\0' || *p == '#' || *p == '\n')
break;
if (q < &sv->serv_aliases[IRS_SV_MAXALIASES - 1])
*q++ = p;
while (*p && *p != '\n' && *p != ' ' && *p != '\t' && *p != '#')
++p;
}
*p = '\0';
*q = NULL;
return (&sv->serv);
}
/* Private. */
#ifdef IRS_LCL_SV_DB
static struct servent *
sv_db_rec(struct lcl_sv *sv, DBT *key, DBT *data) {
char *p, **q;
int n;
p = data->data;
p[data->size - 1] = '\0'; /* should be, but we depend on it */
if (((char *)key->data)[0] == '\0') {
if (key->size < sizeof(u_short)*2 || data->size < 2)
return (NULL);
sv->serv.s_port = ((u_short *)key->data)[1];
n = strlen(p) + 1;
if (n > sizeof(sv->line)) {
n = sizeof(sv->line);
}
memcpy(sv->line, p, n);
sv->serv.s_name = sv->line;
if ((sv->serv.s_proto = strchr(sv->line, '/')) != NULL)
*(sv->serv.s_proto)++ = '\0';
p += n;
data->size -= n;
} else {
if (data->size < sizeof(u_short) + 1)
return (NULL);
if (key->size > sizeof(sv->line))
key->size = sizeof(sv->line);
((char *)key->data)[key->size - 1] = '\0';
memcpy(sv->line, key->data, key->size);
sv->serv.s_name = sv->line;
if ((sv->serv.s_proto = strchr(sv->line, '/')) != NULL)
*(sv->serv.s_proto)++ = '\0';
sv->serv.s_port = *(u_short *)data->data;
p += sizeof(u_short);
data->size -= sizeof(u_short);
}
q = sv->serv.s_aliases = sv->serv_aliases;
while (data->size > 0 && q < &sv->serv_aliases[IRS_SV_MAXALIASES - 1]) {
*q++ = p;
n = strlen(p) + 1;
data->size -= n;
p += n;
}
*q = NULL;
return (&sv->serv);
}
#endif