From 85bbbfa450113727532984633333175ed6d16011 Mon Sep 17 00:00:00 2001
From: Sam Leffler <sam@ucbvax.Berkeley.EDU>
Date: Sun, 23 May 1982 05:26:16 -0800
Subject: [PATCH] date and time created 82/05/22 22:26:16 by sam

SCCS-vsn: sbin/routed/af.c 4.1
---
 usr/src/sbin/routed/af.c | 139 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 usr/src/sbin/routed/af.c

diff --git a/usr/src/sbin/routed/af.c b/usr/src/sbin/routed/af.c
new file mode 100644
index 0000000000..e409215690
--- /dev/null
+++ b/usr/src/sbin/routed/af.c
@@ -0,0 +1,139 @@
+#ifndef lint
+static char sccsid[] = "@(#)af.c	4.1 %G%";
+#endif
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/in.h>
+
+#include "router.h"
+#include "rip.h"
+
+/*
+ * Address family support routines
+ */
+int	null_hash(), null_netmatch(), null_output(),
+	null_portmatch(), null_checkhost(), null_canon();
+int	inet_hash(), inet_netmatch(), inet_output(),
+	inet_portmatch(), inet_checkhost(), inet_canon();
+#define NIL \
+	{ null_hash,		null_netmatch,		null_output, \
+	  null_portmatch,	null_checkhost,		null_canon }
+#define	INET \
+	{ inet_hash,		inet_netmatch,		inet_output, \
+	  inet_portmatch,	inet_checkhost,		inet_canon }
+
+struct afswitch afswitch[AF_MAX] =
+	{ NIL, NIL, INET, INET, NIL, NIL, NIL, NIL, NIL, NIL, NIL };
+
+inet_hash(sin, hp)
+	register struct sockaddr_in *sin;
+	struct afhash *hp;
+{
+
+	hp->afh_nethash = sin->sin_addr.s_net;
+	hp->afh_hosthash = ntohl(sin->sin_addr.s_addr);
+}
+
+inet_netmatch(sin1, sin2)
+	struct sockaddr_in *sin1, *sin2;
+{
+
+	return (sin1->sin_addr.s_net == sin2->sin_addr.s_net);
+}
+
+/*
+ * Verify the message is from the right port.
+ */
+inet_portmatch(sin)
+	struct sockaddr_in *sin;
+{
+	int port = ntohs(sin->sin_port);
+
+	return (port == IPPORT_ROUTESERVER);
+}
+
+/*
+ * Internet output routine.
+ */
+inet_output(sin, size)
+	struct sockaddr_in *sin;
+	int size;
+{
+	extern int s;
+	extern char packet[MAXPACKETSIZE];
+	struct sockaddr_in dst;
+
+	dst = *sin;
+	sin = &dst;
+	if (sin->sin_port == 0)
+		sin->sin_port = htons(IPPORT_ROUTESERVER);
+	if (send(s, sin, packet, size) < 0)
+		perror("send");
+}
+
+/*
+ * Return 1 if the address is for an Internet host,
+ * otherwise assume it's a network address (broadcast).
+ */
+inet_checkhost(sin)
+	struct sockaddr_in *sin;
+{
+	extern struct in_addr if_makeaddr();
+	struct in_addr netaddr;
+
+	netaddr = if_makeaddr((int)sin->sin_addr.s_net, INADDR_ANY);
+	return (netaddr.s_addr != sin->sin_addr.s_addr);
+}
+
+inet_canon(sin)
+	struct sockaddr_in *sin;
+{
+	sin->sin_port = 0;
+}
+
+/*ARGSUSED*/
+null_hash(addr, hp)
+	struct sockaddr *addr;
+	struct afhash *hp;
+{
+
+	hp->afh_nethash = hp->afh_hosthash = 0;
+}
+
+/*ARGSUSED*/
+null_netmatch(a1, a2)
+	struct sockaddr *a1, *a2;
+{
+
+	return (0);
+}
+
+/*ARGSUSED*/
+null_output(a1, n)
+	struct sockaddr *a1;
+	int n;
+{
+	;
+}
+
+/*ARGSUSED*/
+null_portmatch(a1)
+	struct sockaddr *a1;
+{
+	return (0);
+}
+
+/*ARGSUSED*/
+null_checkhost(a1)
+	struct sockaddr *a1;
+{
+	return (0);
+}
+
+/*ARGSUSED*/
+null_canon(a1)
+	struct sockaddr *a1;
+{
+	;
+}
-- 
2.20.1