projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
BSD 4_3_Tahoe release
[unix-history] / usr / src / etc / named / ns_sort.c
/*
* Copyright (c) 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)ns_sort.c 4.4 (Berkeley) 6/18/88";
#endif /* not lint */
#include <stdio.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <syslog.h>
#include <arpa/nameser.h>
#include "ns.h"
#include "db.h"
extern char *p_type(), *p_class();
extern int debug;
extern FILE *ddt;
struct netinfo*
local(from)
struct sockaddr_in *from;
{
extern struct netinfo *nettab, netloop;
struct netinfo *ntp;
if (from->sin_addr.s_addr == netloop.my_addr.s_addr)
return( &netloop);
for (ntp = nettab; ntp != NULL; ntp = ntp->next) {
if (ntp->net == (from->sin_addr.s_addr & ntp->mask))
return(ntp);
}
return(NULL);
}
sort_response(cp, ancount, lp, eom)
register char *cp;
register int ancount;
struct netinfo *lp;
u_char *eom;
{
register struct netinfo *ntp;
extern struct netinfo *nettab;
#ifdef DEBUG
if (debug > 2)
fprintf(ddt,"sort_response(%d)\n", ancount);
#endif DEBUG
if (ancount > 1) {
if (sort_rr(cp, ancount, lp, eom))
return;
for (ntp = nettab; ntp != NULL; ntp = ntp->next) {
if ((ntp->net == lp->net) && (ntp->mask == lp->mask))
continue;
if (sort_rr(cp, ancount, ntp, eom))
break;
}
}
}
int
sort_rr(cp, count, ntp, eom)
register u_char *cp;
int count;
register struct netinfo *ntp;
u_char *eom;
{
int type, class, dlen, n, c;
struct in_addr inaddr;
u_char *rr1;
#ifdef DEBUG
if (debug > 2) {
inaddr.s_addr = ntp->net;
fprintf(ddt,"sort_rr( x%x, %d, %s)\n",cp, count,
inet_ntoa(inaddr));
}
#endif DEBUG
rr1 = NULL;
for (c = count; c > 0; --c) {
n = dn_skipname(cp, eom);
if (n < 0)
return (1); /* bogus, stop processing */
cp += n;
if (cp + QFIXEDSZ > eom)
return (1);
GETSHORT(type, cp);
GETSHORT(class, cp);
cp += sizeof(u_long);
GETSHORT(dlen, cp);
if (dlen > eom - cp)
return (1); /* bogus, stop processing */
switch (type) {
case T_A:
switch (class) {
case C_IN:
bcopy(cp, (char *)&inaddr, sizeof(inaddr));
if (rr1 == NULL)
rr1 = cp;
if ((ntp->mask & inaddr.s_addr) == ntp->net) {
#ifdef DEBUG
if (debug > 1) {
fprintf(ddt,"net %s best choice\n",
inet_ntoa(inaddr));
}
#endif DEBUG
if (rr1 != cp) {
bcopy(rr1, cp, sizeof(inaddr));
bcopy((char *)&inaddr, rr1, sizeof(inaddr));
}
return(1);
}
break;
}
break;
}
cp += dlen;
}
return(0);
}
#ifdef notdef
dump_namebuf(np)
register struct namebuf *np;
{
register struct databuf *dp;
long n;
u_long addr;
u_short i;
int j;
char *cp;
char *proto;
FILE *fp;
extern char *inet_ntoa(), *p_protocal(), *p_service();
int found_data;
gettime(&tt);
if ((fp = fopen("/usr/tmp/namebuf", "a")) == NULL)
return;
found_data = 0;
for (dp = np->n_data; dp != NULL; dp = dp->d_next) {
if (dp->d_ttl <= tt.tv_sec)
continue; /* Stale */
if (!found_data) {
fprintf(fp, "%s\t", np->n_dname);
if (strlen(np->n_dname) < 8)
(void) putc('\t', fp);
found_data++;
} else
fprintf(fp, "\t\t");
if (dp->d_zone == 0)
fprintf(fp, "%d\t", dp->d_ttl - tt.tv_sec);
else if (dp->d_ttl > zones[dp->d_zone].z_minimum)
fprintf(fp, "%d\t", dp->d_ttl);
fprintf(fp, "%s\t%s\t", p_class(dp->d_class),
p_type(dp->d_type));
cp = dp->d_data;
/*
* Print type specific data
*/
switch (dp->d_type) {
case T_A:
switch (dp->d_class) {
case C_IN:
n = htonl(_getlong(cp));
fprintf(fp, "%s\n",
inet_ntoa(*(struct in_addr *)&n));
break;
}
break;
case T_CNAME:
case T_MB:
case T_MG:
case T_MR:
case T_PTR:
if (cp[0] == '\0')
fprintf(fp, ".\n");
else
fprintf(fp, "%s.\n", cp);
break;
case T_NS:
cp = dp->d_data;
if (cp[0] == '\0')
fprintf(fp, ".\t");
else
fprintf(fp, "%s.", cp);
if (dp->d_nstime)
fprintf(fp, "\t; %d", dp->d_nstime);
fprintf(fp, "\n");
break;
case T_HINFO:
if (n = *cp++) {
fprintf(fp, "\"%.*s\"", n, cp);
cp += n;
} else
fprintf(fp, "\"\"");
if (n = *cp++)
fprintf(fp, " \"%.*s\"", n, cp);
else
fprintf(fp, "\"\"");
(void) putc('\n', fp);
break;
case T_SOA:
fprintf(fp, "%s.", cp);
cp += strlen(cp) + 1;
fprintf(fp, " %s. (\n", cp);
cp += strlen(cp) + 1;
fprintf(fp, "\t\t%d", _getlong(cp));
cp += sizeof(u_long);
fprintf(fp, " %d", _getlong(cp));
cp += sizeof(u_long);
fprintf(fp, " %d", _getlong(cp));
cp += sizeof(u_long);
fprintf(fp, " %d", _getlong(cp));
cp += sizeof(u_long);
fprintf(fp, " %d )\n", _getlong(cp));
break;
case T_MX:
fprintf(fp,"%d", _getshort(cp));
cp += sizeof(u_short);
fprintf(fp," %s.\n", cp);
break;
case T_UINFO:
fprintf(fp, "\"%s\"\n", cp);
break;
case T_UID:
case T_GID:
if (dp->d_size == sizeof(u_long)) {
fprintf(fp, "%d\n", _getlong(cp));
cp += sizeof(u_long);
}
break;
case T_WKS:
addr = htonl(_getlong(cp));
fprintf(fp,"%s ",
inet_ntoa(*(struct in_addr *)&addr));
cp += sizeof(u_long);
proto = p_protocal(*cp); /* protocal */
cp += sizeof(char);
fprintf(fp, "%s ", proto);
i = 0;
while(cp < dp->d_data + dp->d_size) {
j = *cp++;
do {
if(j & 0200)
fprintf(fp," %s",
p_service(i, proto));
j <<= 1;
} while(++i & 07);
}
fprintf(fp,"\n");
break;
default:
fprintf(fp, "???\n");
}
}
(void) fclose(fp);
}
#endif notdef
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.