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/*-
* Copyright (c) 1994, Garrett Wollman
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$Id: getnetnamadr.c,v 1.1.1.1 2003/11/19 01:51:28 kyu3 Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <paths.h>
#include <string.h>
#include "Socklib_internals.h"
enum service_type {
SERVICE_NONE = 0,
SERVICE_BIND,
SERVICE_TABLE,
SERVICE_NIS };
#define SERVICE_MAX SERVICE_NIS
static struct {
const char *name;
enum service_type type;
} service_names[] = {
{ "hosts", SERVICE_TABLE },
{ _PATH_HOSTS, SERVICE_TABLE },
{ "hosttable", SERVICE_TABLE },
{ "htable", SERVICE_TABLE },
{ "bind", SERVICE_BIND },
{ "dns", SERVICE_BIND },
{ "domain", SERVICE_BIND },
{ "yp", SERVICE_NIS },
{ "yellowpages", SERVICE_NIS },
{ "nis", SERVICE_NIS },
{ 0, SERVICE_NONE }
};
static enum service_type service_order[SERVICE_MAX + 1];
static int service_done = 0;
static enum service_type
get_service_name(const char *name) {
int i;
for(i = 0; service_names[i].type != SERVICE_NONE; i++) {
if(!strcasecmp(name, service_names[i].name)) {
return service_names[i].type;
}
}
return SERVICE_NONE;
}
static void
init_services()
{
char *cp, *p, buf[BUFSIZ];
register int cc = 0;
FILE *fd;
if ((fd = (FILE *)fopen(_PATH_NETCONF, "r")) == NULL) {
/* make some assumptions */
service_order[0] = SERVICE_TABLE;
service_order[1] = SERVICE_NONE;
} else {
while (fgets(buf, BUFSIZ, fd) != NULL && cc < SERVICE_MAX) {
if(buf[0] == '#')
continue;
p = buf;
while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0')
;
if (cp == NULL)
continue;
do {
if (isalpha(cp[0])) {
service_order[cc] = get_service_name(cp);
if(service_order[cc] != SERVICE_NONE)
cc++;
}
while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0')
;
} while(cp != NULL && cc < SERVICE_MAX);
}
service_order[cc] = SERVICE_NONE;
fclose(fd);
}
service_done = 1;
}
struct netent *
getnetbyname(const char *name)
{
struct netent *hp = 0;
int nserv = 0;
if (!service_done)
init_services();
while (!hp) {
switch (service_order[nserv]) {
case SERVICE_NONE:
return NULL;
case SERVICE_TABLE:
hp = _getnetbyhtname(name);
break;
case SERVICE_BIND:
hp = _getnetbydnsname(name);
break;
case SERVICE_NIS:
hp = _getnetbynisname(name);
break;
}
nserv++;
}
return hp;
}
struct netent *
getnetbyaddr(uint32_t addr, int af)
{
struct netent *hp = 0;
int nserv = 0;
if (!service_done)
init_services();
while (!hp) {
switch (service_order[nserv]) {
case SERVICE_NONE:
return 0;
case SERVICE_TABLE:
hp = _getnetbyhtaddr(addr, af);
break;
case SERVICE_BIND:
hp = _getnetbydnsaddr(addr, af);
break;
case SERVICE_NIS:
hp = _getnetbynisaddr(addr, af);
break;
}
nserv++;
}
return hp;
}
void
setnetent(int stayopen)
{
_setnethtent(stayopen);
_setnetdnsent(stayopen);
}
void
endnetent()
{
_endnethtent();
_endnetdnsent();
}
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