NetBSD/usr.sbin/named/db_glue.c

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1993-03-21 12:45:37 +03:00
/*
* Copyright (c) 1986, 1988 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.
*/
#ifndef lint
static char sccsid[] = "@(#)db_glue.c 4.4 (Berkeley) 6/1/90";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <stdio.h>
#include <syslog.h>
#include <ctype.h>
#include <netdb.h>
#include <arpa/nameser.h>
#include "ns.h"
#include "db.h"
struct valuelist {
struct valuelist *next, *prev;
char *name;
char *proto;
short port;
} *servicelist, *protolist;
buildservicelist()
{
struct servent *sp;
struct valuelist *slp;
setservent(1);
while (sp = getservent()) {
slp = (struct valuelist *)malloc(sizeof(struct valuelist));
slp->name = savestr(sp->s_name);
slp->proto = savestr(sp->s_proto);
slp->port = ntohs((u_short)sp->s_port);
slp->next = servicelist;
slp->prev = NULL;
if (servicelist)
servicelist->prev = slp;
servicelist = slp;
}
endservent();
}
buildprotolist()
{
struct protoent *pp;
struct valuelist *slp;
setprotoent(1);
while (pp = getprotoent()) {
slp = (struct valuelist *)malloc(sizeof(struct valuelist));
slp->name = savestr(pp->p_name);
slp->port = pp->p_proto;
slp->next = protolist;
slp->prev = NULL;
if (protolist)
protolist->prev = slp;
protolist = slp;
}
endprotoent();
}
/*
* Convert service name or (ascii) number to int.
*/
servicenumber(p)
char *p;
{
return (findservice(p, &servicelist));
}
/*
* Convert protocol name or (ascii) number to int.
*/
protocolnumber(p)
char *p;
{
return (findservice(p, &protolist));
}
findservice(s, list)
register char *s;
register struct valuelist **list;
{
register struct valuelist *lp = *list;
int n;
for (; lp != NULL; lp = lp->next)
if (strcasecmp(lp->name, s) == 0) {
if (lp != *list) {
lp->prev->next = lp->next;
if (lp->next)
lp->next->prev = lp->prev;
(*list)->prev = lp;
lp->next = *list;
*list = lp;
}
return(lp->port);
}
if (sscanf(s, "%d", &n) != 1 || n <= 0)
n = -1;
return(n);
}
struct servent *
cgetservbyport(port, proto)
u_short port;
char *proto;
{
register struct valuelist **list = &servicelist;
register struct valuelist *lp = *list;
static struct servent serv;
port = htons(port);
for (; lp != NULL; lp = lp->next) {
if (port != lp->port)
continue;
if (strcasecmp(lp->proto, proto) == 0) {
if (lp != *list) {
lp->prev->next = lp->next;
if (lp->next)
lp->next->prev = lp->prev;
(*list)->prev = lp;
lp->next = *list;
*list = lp;
}
serv.s_name = lp->name;
serv.s_port = htons((u_short)lp->port);
serv.s_proto = lp->proto;
return(&serv);
}
}
return(0);
}
struct protoent *
cgetprotobynumber(proto)
register int proto;
{
register struct valuelist **list = &protolist;
register struct valuelist *lp = *list;
static struct protoent prot;
for (; lp != NULL; lp = lp->next)
if (lp->port == proto) {
if (lp != *list) {
lp->prev->next = lp->next;
if (lp->next)
lp->next->prev = lp->prev;
(*list)->prev = lp;
lp->next = *list;
*list = lp;
}
prot.p_name = lp->name;
prot.p_proto = lp->port;
return(&prot);
}
return(0);
}
char *
protocolname(num)
int num;
{
static char number[8];
struct protoent *pp;
pp = cgetprotobynumber(num);
if(pp == 0) {
(void) sprintf(number, "%d", num);
return(number);
}
return(pp->p_name);
}
char *
servicename(port, proto)
u_short port;
char *proto;
{
static char number[8];
struct servent *ss;
ss = cgetservbyport(htons(port), proto);
if(ss == 0) {
(void) sprintf(number, "%d", port);
return(number);
}
return(ss->s_name);
}