Initial import, 0.1 + pk 0.2.4-B1

[unix-history] / usr.sbin / named / db_glue.c

/*
* 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);
}