This commit was generated by cvs2svn to compensate for changes in r168371,
which included commits to RCS files with non-trunk default branches.
This commit is contained in:
Andrew Thompson
commit
f3300398cb
@ -11,7 +11,7 @@
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-stp.c,v 1.13.2.1 2005/04/26 07:27:17 guy Exp $";
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"@(#) $Header: /tcpdump/master/tcpdump/print-stp.c,v 1.13.2.7 2007/03/18 17:12:36 hannes Exp $";
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#endif
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#ifdef HAVE_CONFIG_H
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@ -28,75 +28,338 @@ static const char rcsid[] _U_ =
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#include "addrtoname.h"
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#include "extract.h"
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static void
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#define RSTP_EXTRACT_PORT_ROLE(x) (((x)&0x0C)>>2)
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/* STP timers are expressed in multiples of 1/256th second */
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#define STP_TIME_BASE 256
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#define STP_BPDU_MSTP_MIN_LEN 102
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struct stp_bpdu_ {
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u_int8_t protocol_id[2];
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u_int8_t protocol_version;
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u_int8_t bpdu_type;
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u_int8_t flags;
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u_int8_t root_id[8];
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u_int8_t root_path_cost[4];
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u_int8_t bridge_id[8];
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u_int8_t port_id[2];
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u_int8_t message_age[2];
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u_int8_t max_age[2];
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u_int8_t hello_time[2];
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u_int8_t forward_delay[2];
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u_int8_t v1_length;
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};
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#define STP_PROTO_REGULAR 0x00
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#define STP_PROTO_RAPID 0x02
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#define STP_PROTO_MSTP 0x03
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struct tok stp_proto_values[] = {
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{ STP_PROTO_REGULAR, "802.1d" },
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{ STP_PROTO_RAPID, "802.1w" },
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{ STP_PROTO_MSTP, "802.1s" },
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{ 0, NULL}
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};
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#define STP_BPDU_TYPE_CONFIG 0x00
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#define STP_BPDU_TYPE_RSTP 0x02
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#define STP_BPDU_TYPE_TOPO_CHANGE 0x80
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struct tok stp_bpdu_flag_values[] = {
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{ 0x01, "Topology change" },
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{ 0x02, "Proposal" },
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{ 0x10, "Learn" },
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{ 0x20, "Forward" },
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{ 0x40, "Agreement" },
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{ 0x80, "Topology change ACK" },
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{ 0, NULL}
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};
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struct tok stp_bpdu_type_values[] = {
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{ STP_BPDU_TYPE_CONFIG, "Config" },
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{ STP_BPDU_TYPE_RSTP, "Rapid STP" },
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{ STP_BPDU_TYPE_TOPO_CHANGE, "Topology Change" },
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{ 0, NULL}
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};
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struct tok rstp_obj_port_role_values[] = {
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{ 0x00, "Unknown" },
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{ 0x01, "Alternate" },
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{ 0x02, "Root" },
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{ 0x03, "Designated" },
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{ 0, NULL}
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};
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static char *
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stp_print_bridge_id(const u_char *p)
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{
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printf("%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
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p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
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static char bridge_id_str[sizeof("pppp.aa:bb:cc:dd:ee:ff")];
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snprintf(bridge_id_str, sizeof(bridge_id_str),
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"%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
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p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
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return bridge_id_str;
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}
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static void
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stp_print_config_bpdu(const u_char *p)
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stp_print_config_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
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{
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printf("config ");
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if (p[4] & 1)
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printf("TOP_CHANGE ");
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if (p[4] & 0x80)
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printf("TOP_CHANGE_ACK ");
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printf(", Flags [%s]",
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bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));
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stp_print_bridge_id(p+17);
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printf(".%.2x%.2x ", p[25], p[26]);
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printf(", bridge-id %s.%04x, length %u",
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stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id),
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EXTRACT_16BITS(&stp_bpdu->port_id), length);
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printf("root ");
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stp_print_bridge_id(p+5);
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/* in non-verbose mode just print the bridge-id */
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if (!vflag) {
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return;
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}
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printf(" pathcost %i ", (p[13] << 24) | (p[14] << 16) | (p[15] << 8) | p[16]);
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printf("\n\tmessage-age %.2fs, max-age %.2fs"
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", hello-time %.2fs, forwarding-delay %.2fs",
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(float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
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(float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
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(float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
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(float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);
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printf("age %i ", p[27]);
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printf("max %i ", p[29]);
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printf("hello %i ", p[31]);
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printf("fdelay %i ", p[33]);
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}
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printf("\n\troot-id %s, root-pathcost %u",
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stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
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EXTRACT_32BITS(&stp_bpdu->root_path_cost));
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static void
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stp_print_tcn_bpdu(void)
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{
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printf("tcn");
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/* Port role is only valid for 802.1w */
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if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
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printf(", port-role %s",
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tok2str(rstp_obj_port_role_values, "Unknown",
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RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
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}
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}
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/*
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* Print 802.1d packets.
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* MSTP packet format
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* Ref. IEEE 802.1Q 2003 Ed. Section 14
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*
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* MSTP BPDU
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*
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* 2 - bytes Protocol Id
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* 1 - byte Protocol Ver.
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* 1 - byte BPDU tye
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* 1 - byte Flags
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* 8 - bytes CIST Root Identifier
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* 4 - bytes CIST External Path Cost
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* 8 - bytes CIST Regional Root Identifier
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* 2 - bytes CIST Port Identifier
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* 2 - bytes Message Age
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* 2 - bytes Max age
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* 2 - bytes Hello Time
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* 2 - bytes Forward delay
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* 1 - byte Version 1 length. Must be 0
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* 2 - bytes Version 3 length
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* 1 - byte Config Identifier
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* 32 - bytes Config Name
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* 2 - bytes Revision level
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* 16 - bytes Config Digest [MD5]
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* 4 - bytes CIST Internal Root Path Cost
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* 8 - bytes CIST Bridge Identifier
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* 1 - byte CIST Remaining Hops
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* 16 - bytes MSTI information [Max 64 MSTI, each 16 bytes]
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*
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* MSTI Payload
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*
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* 1 - byte MSTI flag
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* 8 - bytes MSTI Regional Root Identifier
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* 4 - bytes MSTI Regional Path Cost
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* 1 - byte MSTI Bridge Priority
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* 1 - byte MSTI Port Priority
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* 1 - byte MSTI Remaining Hops
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*/
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#define MST_BPDU_MSTI_LENGTH 16
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#define MST_BPDU_CONFIG_INFO_LENGTH 64
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/* Offsets of fields from the begginning for the packet */
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#define MST_BPDU_VER3_LEN_OFFSET 36
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#define MST_BPDU_CONFIG_NAME_OFFSET 39
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#define MST_BPDU_CONFIG_DIGEST_OFFSET 73
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#define MST_BPDU_CIST_INT_PATH_COST_OFFSET 89
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#define MST_BPDU_CIST_BRIDGE_ID_OFFSET 93
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#define MST_BPDU_CIST_REMAIN_HOPS_OFFSET 101
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#define MST_BPDU_MSTI_OFFSET 102
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/* Offsets within an MSTI */
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#define MST_BPDU_MSTI_ROOT_PRIO_OFFSET 1
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#define MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET 9
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#define MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET 13
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#define MST_BPDU_MSTI_PORT_PRIO_OFFSET 14
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#define MST_BPDU_MSTI_REMAIN_HOPS_OFFSET 15
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static void
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stp_print_mstp_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
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{
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const u_char *ptr;
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u_int16_t v3len;
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u_int16_t len;
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u_int16_t msti;
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u_int16_t offset;
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ptr = (const u_char *)stp_bpdu;
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printf(", CIST Flags [%s]",
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bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));
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/*
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* in non-verbose mode just print the flags. We dont read that much
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* of the packet (DEFAULT_SNAPLEN) to print out cist bridge-id
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*/
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if (!vflag) {
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return;
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}
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printf(", CIST bridge-id %s.%04x, length %u",
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stp_print_bridge_id(ptr + MST_BPDU_CIST_BRIDGE_ID_OFFSET),
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EXTRACT_16BITS(&stp_bpdu->port_id), length);
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printf("\n\tmessage-age %.2fs, max-age %.2fs"
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", hello-time %.2fs, forwarding-delay %.2fs",
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(float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
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(float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
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(float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
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(float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);
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printf("\n\tCIST root-id %s, ext-pathcost %u int-pathcost %u",
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stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
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EXTRACT_32BITS(&stp_bpdu->root_path_cost),
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EXTRACT_32BITS(ptr + MST_BPDU_CIST_INT_PATH_COST_OFFSET));
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printf(", port-role %s",
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tok2str(rstp_obj_port_role_values, "Unknown",
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RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
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printf("\n\tCIST regional-root-id %s",
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stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id));
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printf("\n\tMSTP Configuration Name %s, revision %u, digest %08x%08x%08x%08x",
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ptr + MST_BPDU_CONFIG_NAME_OFFSET,
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EXTRACT_16BITS(ptr + MST_BPDU_CONFIG_NAME_OFFSET + 32),
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EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET),
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EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 4),
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EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 8),
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EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 12));
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printf("\n\tCIST remaining-hops %d", ptr[MST_BPDU_CIST_REMAIN_HOPS_OFFSET]);
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/* Dump all MSTI's */
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v3len = EXTRACT_16BITS(ptr + MST_BPDU_VER3_LEN_OFFSET);
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if (v3len > MST_BPDU_CONFIG_INFO_LENGTH) {
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len = v3len - MST_BPDU_CONFIG_INFO_LENGTH;
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offset = MST_BPDU_MSTI_OFFSET;
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while (len >= MST_BPDU_MSTI_LENGTH) {
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msti = EXTRACT_16BITS(ptr + offset +
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MST_BPDU_MSTI_ROOT_PRIO_OFFSET);
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msti = msti & 0x0FFF;
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printf("\n\tMSTI %d, Flags [%s], port-role %s",
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msti, bittok2str(stp_bpdu_flag_values, "none", ptr[offset]),
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tok2str(rstp_obj_port_role_values, "Unknown",
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RSTP_EXTRACT_PORT_ROLE(ptr[offset])));
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printf("\n\t\tMSTI regional-root-id %s, pathcost %u",
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stp_print_bridge_id(ptr + offset +
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MST_BPDU_MSTI_ROOT_PRIO_OFFSET),
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EXTRACT_32BITS(ptr + offset +
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MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET));
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printf("\n\t\tMSTI bridge-prio %d, port-prio %d, hops %d",
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ptr[offset + MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET] >> 4,
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ptr[offset + MST_BPDU_MSTI_PORT_PRIO_OFFSET] >> 4,
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ptr[offset + MST_BPDU_MSTI_REMAIN_HOPS_OFFSET]);
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len -= MST_BPDU_MSTI_LENGTH;
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offset += MST_BPDU_MSTI_LENGTH;
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}
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}
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}
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/*
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* Print 802.1d / 802.1w / 802.1q (mstp) packets.
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*/
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void
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stp_print(const u_char *p, u_int length)
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{
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if (length < 4)
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goto trunc;
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const struct stp_bpdu_ *stp_bpdu;
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u_int16_t mstp_len;
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stp_bpdu = (struct stp_bpdu_*)p;
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printf("802.1d ");
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if (p[0] || p[1] || p[2]) {
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printf("unknown version");
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return;
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}
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/* Minimum STP Frame size. */
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if (length < 4)
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goto trunc;
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if (EXTRACT_16BITS(&stp_bpdu->protocol_id)) {
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printf("unknown STP version, length %u", length);
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return;
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}
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switch (p[3])
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{
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case 0x00:
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if (length < 10)
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goto trunc;
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stp_print_config_bpdu(p);
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break;
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printf("STP %s", tok2str(stp_proto_values, "Unknown STP protocol (0x%02x)",
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stp_bpdu->protocol_version));
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case 0x80:
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stp_print_tcn_bpdu();
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break;
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switch (stp_bpdu->protocol_version) {
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case STP_PROTO_REGULAR:
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case STP_PROTO_RAPID:
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case STP_PROTO_MSTP:
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break;
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default:
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return;
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}
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default:
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printf("unknown type %i", p[3]);
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break;
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}
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printf(", %s", tok2str(stp_bpdu_type_values, "Unknown BPDU Type (0x%02x)",
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stp_bpdu->bpdu_type));
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return;
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trunc:
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printf("[|stp %d]", length);
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switch (stp_bpdu->bpdu_type) {
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case STP_BPDU_TYPE_CONFIG:
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if (length < sizeof(struct stp_bpdu_) - 1) {
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goto trunc;
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}
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stp_print_config_bpdu(stp_bpdu, length);
|
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break;
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case STP_BPDU_TYPE_RSTP:
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if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
|
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if (length < sizeof(struct stp_bpdu_)) {
|
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goto trunc;
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||||
}
|
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stp_print_config_bpdu(stp_bpdu, length);
|
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} else if (stp_bpdu->protocol_version == STP_PROTO_MSTP) {
|
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if (length < STP_BPDU_MSTP_MIN_LEN) {
|
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goto trunc;
|
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}
|
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if (stp_bpdu->v1_length != 0) {
|
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/* FIX ME: Emit a message here ? */
|
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goto trunc;
|
||||
}
|
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/* Validate v3 length */
|
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mstp_len = EXTRACT_16BITS(p + MST_BPDU_VER3_LEN_OFFSET);
|
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mstp_len += 2; /* length encoding itself is 2 bytes */
|
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if (length < (sizeof(struct stp_bpdu_) + mstp_len)) {
|
||||
goto trunc;
|
||||
}
|
||||
stp_print_mstp_bpdu(stp_bpdu, length);
|
||||
}
|
||||
break;
|
||||
|
||||
case STP_BPDU_TYPE_TOPO_CHANGE:
|
||||
/* always empty message - just break out */
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return;
|
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trunc:
|
||||
printf("[|stp %d]", length);
|
||||
}
|
||||
|
||||
/*
|
||||
* Local Variables:
|
||||
* c-style: whitesmith
|
||||
* c-basic-offset: 4
|
||||
* End:
|
||||
*/
|
||||
|
||||
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