1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <stdio.h> 28 #include <sys/types.h> 29 #include <sys/socket.h> 30 #include <sys/ethernet.h> 31 32 #include <snoop.h> 33 34 struct conf_bpdu { 35 uchar_t cb_protid[2]; /* Protocol Identifier */ 36 uchar_t cb_protvers; /* Protocol Version Identifier */ 37 uchar_t cb_type; /* BPDU Type */ 38 uchar_t cb_flags; /* BPDU Flags */ 39 uchar_t cb_rootid[8]; /* Root Identifier */ 40 uchar_t cb_rootcost[4]; /* Root Path Cost */ 41 uchar_t cb_bridgeid[8]; /* Bridge Identifier */ 42 uchar_t cb_portid[2]; /* Port Identifier */ 43 uchar_t cb_messageage[2]; /* Message Age */ 44 uchar_t cb_maxage[2]; /* Max Age */ 45 uchar_t cb_hello[2]; /* Hello Time */ 46 uchar_t cb_fwddelay[2]; /* Forward Delay */ 47 }; 48 49 #define BPDU_TYPE_CONF 0 50 #define BPDU_TYPE_RCONF 2 51 #define BPDU_TYPE_TCNOTIF 0x80 52 53 int 54 interpret_bpdu(int flags, char *data, int dlen) 55 { 56 struct conf_bpdu *cb; 57 const char *pdutype; 58 59 if (dlen < 4) { 60 (void) snprintf(get_sum_line(), MAXLINE, 61 "BPDU (short packet)"); 62 return (0); 63 } 64 65 cb = (struct conf_bpdu *)data; 66 67 if (flags & F_SUM) { 68 (void) snprintf(get_sum_line(), MAXLINE, 69 "Bridge PDU T:%d L:%d", cb->cb_type, dlen); 70 } 71 72 if (flags & F_DTAIL) { 73 show_header("Bridge-PDU: ", 74 "Bridge PDU Frame", dlen); 75 show_space(); 76 switch (cb->cb_type) { 77 case BPDU_TYPE_CONF: 78 pdutype = "Configuration"; 79 break; 80 case BPDU_TYPE_RCONF: 81 pdutype = "Rapid Configuration"; 82 break; 83 case BPDU_TYPE_TCNOTIF: 84 pdutype = "TC Notification"; 85 break; 86 default: 87 pdutype = "?"; 88 break; 89 } 90 (void) snprintf(get_line(0, 0), get_line_remain(), 91 "PDU type = %d (%s)", cb->cb_type, pdutype); 92 show_trailer(); 93 } 94 return (0); 95 } 96