initial import of NetBSD tree

1 files changed, 156 insertions, 0 deletions

diff --git a/usr.sbin/named/ns_sort.c b/usr.sbin/named/ns_sort.c
new file mode 100644
index 00000000000..ea30eb5c3f5
--- /dev/null
+++ b/usr.sbin/named/ns_sort.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 1986, 1990 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[] = "from: @(#)ns_sort.c	4.10 (Berkeley) 3/3/91";*/
+static char rcsid[] = "$Id: ns_sort.c,v 1.1 1995/10/18 08:47:51 deraadt Exp $";
+#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 <resolv.h>
+#include "ns.h"
+#include "db.h"
+
+extern	int	debug;
+extern  FILE	*ddt;
+
+struct netinfo* 
+local(from)
+	struct sockaddr_in *from;
+{
+	extern struct netinfo *nettab, netloop, **enettab;
+	struct netinfo *ntp;
+
+	if (from->sin_addr.s_addr == netloop.my_addr.s_addr)
+		return( &netloop);
+	for (ntp = nettab; ntp != *enettab; 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:
+	    	case C_HS:
+	    		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);
+}