2 * Copyright (c) 2000 Lennert Buytenhek
4 * This software may be distributed either under the terms of the
5 * BSD-style license that accompanies tcpdump or the GNU General
8 * Format and print IEEE 802.1d spanning tree protocol packets.
9 * Contributed by Lennert Buytenhek <buytenh@gnu.org>
13 static const char rcsid[] _U_ =
14 "@(#) $Header: /tcpdump/master/tcpdump/print-stp.c,v 1.11.2.2 2003/11/16 08:51:46 guy Exp $";
21 #include <tcpdump-stdinc.h>
27 #include "interface.h"
28 #include "addrtoname.h"
32 stp_print_bridge_id(const u_char *p)
34 printf("%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
35 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
39 stp_print_config_bpdu(const u_char *p)
43 printf("TOP_CHANGE ");
45 printf("TOP_CHANGE_ACK ");
47 stp_print_bridge_id(p+20);
48 printf(".%.2x%.2x ", p[28], p[29]);
51 stp_print_bridge_id(p+8);
53 printf(" pathcost %i ", (p[16] << 24) | (p[17] << 16) | (p[18] << 8) | p[19]);
55 printf("age %i ", p[30]);
56 printf("max %i ", p[32]);
57 printf("hello %i ", p[34]);
58 printf("fdelay %i ", p[36]);
62 stp_print_tcn_bpdu(void)
68 * Print 802.1d packets.
71 stp_print(const u_char *p, u_int length)
77 if (p[2] != 0x03 || p[3] || p[4] || p[5]) {
78 printf("unknown version");
87 stp_print_config_bpdu(p);
95 printf("unknown type %i", p[6]);
101 printf("[|stp %d]", length);