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#ifndef LINT
static char rcsid[] = "$Id: db_secure.c,v 1.6 1994/07/23 23:23:56 vixie Exp $";
#endif
/* this file was contributed by Gregory Neil Shapiro of WPI in August 1993 */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <syslog.h>
#include "named.h"
#ifdef SECURE_ZONES
#ifndef SECURE_ZONE_RR
#define SECURE_ZONE_RR "secure_zone"
#endif
#ifndef MASK_SEP
#define MASK_SEP ':'
#endif
int
build_secure_netlist(zp)
struct zoneinfo *zp;
{
struct netinfo *ntp = NULL, **netlistp, **end;
char buf[BUFSIZ];
struct hashbuf *htp;
struct namebuf *snp;
struct databuf *dp;
char *fname, *dname, dnbuf[MAXDNAME];
int errs = 0, securezone = 0;
if (zp->secure_nets) {
free_netlist(&zp->secure_nets);
}
netlistp = &zp->secure_nets;
end = netlistp;
strcat(strcat(strcpy(dnbuf, SECURE_ZONE_RR), "."), zp->z_origin);
dname = dnbuf;
htp = hashtab;
if ((snp = nlookup(dname, &htp, &fname, 0)) == NULL) {
dprintf(1, (ddt,
"build_secure_netlist(%s): FAIL on nlookup %s\n",
zp->z_origin, dname));
zp->secure_nets=NULL;
return(0);
}
/* A parent's RR's aren't valid */
if (strcasecmp(snp->n_dname, SECURE_ZONE_RR)) {
zp->secure_nets=NULL;
return(0);
}
/* Collect secure nets into secure_nets */
for (dp = snp->n_data; dp != NULL; dp = dp->d_next) {
char *maskptr = NULL;
if (!match(dp, C_ANY, T_TXT)) {
continue;
}
bzero(buf, sizeof(buf));
bcopy(dp->d_data+1, buf, dp->d_size-1);
maskptr=strchr(buf, MASK_SEP);
if (maskptr) {
*maskptr++ = 0;
}
dprintf(3, (ddt,
"build_secure_netlist(%s): Found secure zone %s\n",
zp->z_origin, buf));
if (ntp == NULL) {
ntp = (struct netinfo *)malloc(sizeof(struct netinfo));
if (!ntp) {
dprintf(1, (ddt,
"build_secure_netlist (%s): malloc fail\n",
zp->z_origin));
syslog(LOG_ERR,
"build_secure_netlist (%s): Out of Memory",
zp->z_origin);
if (!securezone) {
zp->secure_nets=NULL;
}
return(1);
}
}
if (!inet_aton(buf, &ntp->my_addr)) {
dprintf(1, (ddt,
"build_secure_netlist (%s): Bad address: %s\n",
zp->z_origin, buf));
syslog(LOG_ERR,
"build_secure_netlist (%s): Bad address: %s",
zp->z_origin, buf);
errs++;
continue;
}
if (maskptr && *maskptr) {
if (*maskptr == 'h' || *maskptr == 'H') {
ntp->mask = (u_int32_t)-1;
} else {
if (!inet_aton(maskptr,
(struct in_addr *)&ntp->mask)) {
dprintf(1, (ddt,
"build_secure_netlist (%s): Bad mask: %s\n",
zp->z_origin, maskptr));
syslog(LOG_ERR,
"build_secure_netlist (%s): Bad mask: %s",
zp->z_origin, maskptr);
errs++;
continue;
}
}
} else {
ntp->mask = net_mask(ntp->my_addr);
}
if (ntp->my_addr.s_addr & ~(ntp->mask)) {
dprintf(1, (ddt,
"build_secure_netlist (%s): addr (%s) is not in mask (x%x)\n",
zp->z_origin,
inet_ntoa(ntp->my_addr),
ntp->mask));
syslog(LOG_WARNING,
"build_secure_netlist (%s): addr (%s) is not in mask (x%x)",
zp->z_origin,
inet_ntoa(ntp->my_addr),
ntp->mask);
errs++;
}
ntp->next = NULL;
ntp->addr = ntp->my_addr.s_addr & ntp->mask;
/* Check for duplicates */
if (addr_on_netlist(ntp->my_addr, *netlistp)) {
dprintf(1, (ddt,
"build_secure_netlist (%s): duplicate address %s\n",
zp->z_origin, inet_ntoa(ntp->my_addr)));
syslog(LOG_WARNING,
"build_secure_netlist (%s): duplicate address %s\n",
zp->z_origin, inet_ntoa(ntp->my_addr));
errs++;
continue;
}
*end = ntp;
end = &ntp->next;
ntp = NULL;
securezone++;
}
if (ntp) {
free((char *)ntp);
}
if (!securezone) {
zp->secure_nets=NULL;
}
#ifdef DEBUG
if (debug > 1) {
for (ntp = *netlistp; ntp != NULL; ntp = ntp->next) {
fprintf(ddt, "ntp x%x addr x%x mask x%x",
ntp, ntp->addr, ntp->mask);
fprintf(ddt, " my_addr x%x", ntp->my_addr);
fprintf(ddt, " %s", inet_ntoa(ntp->my_addr));
fprintf(ddt, " next x%x\n", ntp->next);
}
}
#endif
return(errs);
}
#endif /*SECURE_ZONES*/
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