initial import of NetBSD tree

1 files changed, 123 insertions, 0 deletions

diff --git a/usr.sbin/tcpdump/print-arp.c b/usr.sbin/tcpdump/print-arp.c
new file mode 100644
index 00000000000..f9636a66282
--- /dev/null
+++ b/usr.sbin/tcpdump/print-arp.c
@@ -0,0 +1,123 @@
+/*	$NetBSD: print-arp.c,v 1.2 1995/03/06 19:11:02 mycroft Exp $	*/
+
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
+ *	The 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: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static char rcsid[] =
+    "@(#) Header: print-arp.c,v 1.28 94/06/14 20:17:36 leres Exp (LBL)";
+#endif
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+
+#include <stdio.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+
+static u_char ezero[6];
+
+void
+arp_print(register const u_char *bp, int length, int caplen)
+{
+	register const struct ether_arp *ap;
+	register const struct ether_header *eh;
+	const u_char *p;
+	int pro, hrd, op;
+
+	ap = (struct ether_arp *)bp;
+	if ((u_char *)(ap + 1) > snapend) {
+		printf("[|arp]");
+		return;
+	}
+	if (length < sizeof(struct ether_arp)) {
+		(void)printf("truncated-arp");
+		default_print((u_char *)ap, length);
+		return;
+	}
+	/*
+	 * Don't assume alignment.
+	 */
+	p = (u_char*)&ap->arp_pro;
+	pro = (p[0] << 8) | p[1];
+	p = (u_char*)&ap->arp_hrd;
+	hrd = (p[0] << 8) | p[1];
+	p = (u_char*)&ap->arp_op;
+	op = (p[0] << 8) | p[1];
+
+	if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
+	    || ap->arp_hln != sizeof(SHA(ap))
+	    || ap->arp_pln != sizeof(SPA(ap))) {
+		(void)printf("arp-#%d for proto #%d (%d) hardware #%d (%d)",
+				op, pro, ap->arp_pln,
+				hrd, ap->arp_hln);
+		return;
+	}
+	if (pro == ETHERTYPE_TRAIL)
+		(void)printf("trailer-");
+	eh = (struct ether_header *)packetp;
+	switch (op) {
+
+	case ARPOP_REQUEST:
+		(void)printf("arp who-has %s", ipaddr_string(TPA(ap)));
+		if (bcmp((char *)ezero, (char *)THA(ap), 6) != 0)
+			(void)printf(" (%s)", etheraddr_string(THA(ap)));
+		(void)printf(" tell %s", ipaddr_string(SPA(ap)));
+		if (bcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
+			(void)printf(" (%s)", etheraddr_string(SHA(ap)));
+		break;
+
+	case ARPOP_REPLY:
+		(void)printf("arp reply %s", ipaddr_string(SPA(ap)));
+		if (bcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
+			(void)printf(" (%s)", etheraddr_string(SHA(ap)));
+		(void)printf(" is-at %s", etheraddr_string(SHA(ap)));
+		if (bcmp((char *)EDST(eh), (char *)THA(ap), 6) != 0)
+			(void)printf(" (%s)", etheraddr_string(THA(ap)));
+		break;
+
+	case REVARP_REQUEST:
+		(void)printf("rarp who-is %s tell %s",
+			etheraddr_string(THA(ap)),
+			etheraddr_string(SHA(ap)));
+		break;
+
+	case REVARP_REPLY:
+		(void)printf("rarp reply %s at %s",
+			etheraddr_string(THA(ap)),
+			ipaddr_string(TPA(ap)));
+		break;
+
+	default:
+		(void)printf("arp-#%d", op);
+		default_print((u_char *)ap, caplen);
+		return;
+	}
+	if (hrd != ARPHRD_ETHER)
+		printf(" hardware #%d", ap->arp_hrd);
+}