[dragonfly.git] / contrib / tcpdump / print-stp.c

/*
 * Copyright (c) 2000 Lennert Buytenhek
 *
 * This software may be distributed either under the terms of the
 * BSD-style license that accompanies tcpdump or the GNU General
 * Public License
 *
 * Format and print IEEE 802.1d spanning tree protocol packets.
 * Contributed by Lennert Buytenhek <buytenh@gnu.org>
 */

#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-stp.c,v 1.13.2.7 2007/03/18 17:12:36 hannes Exp $";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <tcpdump-stdinc.h>

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "interface.h"
#include "addrtoname.h"
#include "extract.h"

#define	RSTP_EXTRACT_PORT_ROLE(x) (((x)&0x0C)>>2) 
/* STP timers are expressed in multiples of 1/256th second */
#define STP_TIME_BASE 256
#define STP_BPDU_MSTP_MIN_LEN 102

struct stp_bpdu_ {
    u_int8_t protocol_id[2];
    u_int8_t protocol_version;
    u_int8_t bpdu_type;
    u_int8_t flags;
    u_int8_t root_id[8];
    u_int8_t root_path_cost[4];
    u_int8_t bridge_id[8];
    u_int8_t port_id[2];
    u_int8_t message_age[2];
    u_int8_t max_age[2];
    u_int8_t hello_time[2];
    u_int8_t forward_delay[2];
    u_int8_t v1_length;
};

#define STP_PROTO_REGULAR 0x00
#define STP_PROTO_RAPID   0x02
#define STP_PROTO_MSTP    0x03

struct tok stp_proto_values[] = {
    { STP_PROTO_REGULAR, "802.1d" },
    { STP_PROTO_RAPID, "802.1w" },
    { STP_PROTO_MSTP, "802.1s" },
    { 0, NULL}
};

#define STP_BPDU_TYPE_CONFIG      0x00
#define STP_BPDU_TYPE_RSTP        0x02
#define STP_BPDU_TYPE_TOPO_CHANGE 0x80

struct tok stp_bpdu_flag_values[] = {
    { 0x01, "Topology change" },
    { 0x02, "Proposal" },
    { 0x10, "Learn" },
    { 0x20, "Forward" },
    { 0x40, "Agreement" },
    { 0x80, "Topology change ACK" },
    { 0, NULL}
};

struct tok stp_bpdu_type_values[] = {
    { STP_BPDU_TYPE_CONFIG, "Config" },
    { STP_BPDU_TYPE_RSTP, "Rapid STP" },
    { STP_BPDU_TYPE_TOPO_CHANGE, "Topology Change" },
    { 0, NULL}
};

struct tok rstp_obj_port_role_values[] = {
    { 0x00, "Unknown" },
    { 0x01, "Alternate" },
    { 0x02, "Root" },
    { 0x03, "Designated" },
    { 0, NULL}
};

static char *
stp_print_bridge_id(const u_char *p)
{
    static char bridge_id_str[sizeof("pppp.aa:bb:cc:dd:ee:ff")];

    snprintf(bridge_id_str, sizeof(bridge_id_str),
             "%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
             p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);

    return bridge_id_str;
}

static void
stp_print_config_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
{
    printf(", Flags [%s]",
           bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));

    printf(", bridge-id %s.%04x, length %u",
           stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id),
           EXTRACT_16BITS(&stp_bpdu->port_id), length);

    /* in non-verbose mode just print the bridge-id */
    if (!vflag) {
        return;
    }

    printf("\n\tmessage-age %.2fs, max-age %.2fs"
           ", hello-time %.2fs, forwarding-delay %.2fs",
           (float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
           (float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
           (float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
           (float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);

    printf("\n\troot-id %s, root-pathcost %u",
           stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
           EXTRACT_32BITS(&stp_bpdu->root_path_cost));

    /* Port role is only valid for 802.1w */
    if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
        printf(", port-role %s",
               tok2str(rstp_obj_port_role_values, "Unknown",
                       RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
    }
}

/*
 * MSTP packet format
 * Ref. IEEE 802.1Q 2003 Ed. Section 14
 *
 * MSTP BPDU
 *
 * 2 -  bytes Protocol Id
 * 1 -  byte  Protocol Ver. 
 * 1 -  byte  BPDU tye
 * 1 -  byte  Flags
 * 8 -  bytes CIST Root Identifier
 * 4 -  bytes CIST External Path Cost
 * 8 -  bytes CIST Regional Root Identifier
 * 2 -  bytes CIST Port Identifier
 * 2 -  bytes Message Age
 * 2 -  bytes Max age
 * 2 -  bytes Hello Time
 * 2 -  bytes Forward delay
 * 1 -  byte  Version 1 length. Must be 0
 * 2 -  bytes Version 3 length
 * 1 -  byte  Config Identifier
 * 32 - bytes Config Name
 * 2 -  bytes Revision level
 * 16 - bytes Config Digest [MD5]
 * 4 -  bytes CIST Internal Root Path Cost
 * 8 -  bytes CIST Bridge Identifier
 * 1 -  byte  CIST Remaining Hops
 * 16 - bytes MSTI information [Max 64 MSTI, each 16 bytes]
 *
 * MSTI Payload
 *
 * 1 - byte  MSTI flag
 * 8 - bytes MSTI Regional Root Identifier
 * 4 - bytes MSTI Regional Path Cost
 * 1 - byte  MSTI Bridge Priority
 * 1 - byte  MSTI Port Priority
 * 1 - byte  MSTI Remaining Hops
 */

#define MST_BPDU_MSTI_LENGTH		    16
#define MST_BPDU_CONFIG_INFO_LENGTH	    64

/* Offsets of fields from the begginning for the packet */
#define MST_BPDU_VER3_LEN_OFFSET	    36
#define MST_BPDU_CONFIG_NAME_OFFSET	    39
#define MST_BPDU_CONFIG_DIGEST_OFFSET	    73
#define MST_BPDU_CIST_INT_PATH_COST_OFFSET  89
#define MST_BPDU_CIST_BRIDGE_ID_OFFSET	    93
#define MST_BPDU_CIST_REMAIN_HOPS_OFFSET    101
#define MST_BPDU_MSTI_OFFSET		    102
/* Offsets within  an MSTI */
#define MST_BPDU_MSTI_ROOT_PRIO_OFFSET	    1
#define MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET 9
#define MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET    13
#define MST_BPDU_MSTI_PORT_PRIO_OFFSET	    14
#define MST_BPDU_MSTI_REMAIN_HOPS_OFFSET    15

static void
stp_print_mstp_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
{
    const u_char    *ptr;
    u_int16_t	    v3len;
    u_int16_t	    len;
    u_int16_t	    msti;
    u_int16_t	    offset;

    ptr = (const u_char *)stp_bpdu;
    printf(", CIST Flags [%s]",
           bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));

    /*
     * in non-verbose mode just print the flags. We dont read that much
     * of the packet (DEFAULT_SNAPLEN) to print out cist bridge-id
     */
    if (!vflag) {
        return;
    }

    printf(", CIST bridge-id %s.%04x, length %u",
           stp_print_bridge_id(ptr + MST_BPDU_CIST_BRIDGE_ID_OFFSET),
           EXTRACT_16BITS(&stp_bpdu->port_id), length);


    printf("\n\tmessage-age %.2fs, max-age %.2fs"
           ", hello-time %.2fs, forwarding-delay %.2fs",
           (float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
           (float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
           (float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
           (float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);

    printf("\n\tCIST root-id %s, ext-pathcost %u int-pathcost %u",
           stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
           EXTRACT_32BITS(&stp_bpdu->root_path_cost),
           EXTRACT_32BITS(ptr + MST_BPDU_CIST_INT_PATH_COST_OFFSET));

    printf(", port-role %s",
           tok2str(rstp_obj_port_role_values, "Unknown",
                   RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));

    printf("\n\tCIST regional-root-id %s",
           stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id));

    printf("\n\tMSTP Configuration Name %s, revision %u, digest %08x%08x%08x%08x",
           ptr + MST_BPDU_CONFIG_NAME_OFFSET,
	   EXTRACT_16BITS(ptr + MST_BPDU_CONFIG_NAME_OFFSET + 32),
	   EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET),
	   EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 4),
	   EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 8),
	   EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 12));

    printf("\n\tCIST remaining-hops %d", ptr[MST_BPDU_CIST_REMAIN_HOPS_OFFSET]);

    /* Dump all MSTI's */
    v3len = EXTRACT_16BITS(ptr + MST_BPDU_VER3_LEN_OFFSET);
    if (v3len > MST_BPDU_CONFIG_INFO_LENGTH) {
        len = v3len - MST_BPDU_CONFIG_INFO_LENGTH;
        offset = MST_BPDU_MSTI_OFFSET;
        while (len >= MST_BPDU_MSTI_LENGTH) {
            msti = EXTRACT_16BITS(ptr + offset +
                                  MST_BPDU_MSTI_ROOT_PRIO_OFFSET);
            msti = msti & 0x0FFF;

            printf("\n\tMSTI %d, Flags [%s], port-role %s", 
                   msti, bittok2str(stp_bpdu_flag_values, "none", ptr[offset]),
                   tok2str(rstp_obj_port_role_values, "Unknown",
                           RSTP_EXTRACT_PORT_ROLE(ptr[offset])));
            printf("\n\t\tMSTI regional-root-id %s, pathcost %u",
                   stp_print_bridge_id(ptr + offset +
                                       MST_BPDU_MSTI_ROOT_PRIO_OFFSET),
                   EXTRACT_32BITS(ptr + offset +
                                  MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET));
            printf("\n\t\tMSTI bridge-prio %d, port-prio %d, hops %d",
                   ptr[offset + MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET] >> 4,
                   ptr[offset + MST_BPDU_MSTI_PORT_PRIO_OFFSET] >> 4,
                   ptr[offset + MST_BPDU_MSTI_REMAIN_HOPS_OFFSET]);

            len -= MST_BPDU_MSTI_LENGTH;
            offset += MST_BPDU_MSTI_LENGTH;
        }
    }
}

/*
 * Print 802.1d / 802.1w / 802.1q (mstp) packets.
 */
void
stp_print(const u_char *p, u_int length)
{
    const struct stp_bpdu_ *stp_bpdu;
    u_int16_t              mstp_len;
    
    stp_bpdu = (struct stp_bpdu_*)p;

    /* Minimum STP Frame size. */
    if (length < 4)
        goto trunc;
        
    if (EXTRACT_16BITS(&stp_bpdu->protocol_id)) {
        printf("unknown STP version, length %u", length);
        return;
    }

    printf("STP %s", tok2str(stp_proto_values, "Unknown STP protocol (0x%02x)",
                         stp_bpdu->protocol_version));

    switch (stp_bpdu->protocol_version) {
    case STP_PROTO_REGULAR:
    case STP_PROTO_RAPID:
    case STP_PROTO_MSTP:
        break;
    default:
        return;
    }

    printf(", %s", tok2str(stp_bpdu_type_values, "Unknown BPDU Type (0x%02x)",
                           stp_bpdu->bpdu_type));

    switch (stp_bpdu->bpdu_type) {
    case STP_BPDU_TYPE_CONFIG:
        if (length < sizeof(struct stp_bpdu_) - 1) {
            goto trunc;
        }
        stp_print_config_bpdu(stp_bpdu, length);
        break;

    case STP_BPDU_TYPE_RSTP:
        if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
            if (length < sizeof(struct stp_bpdu_)) {
                goto trunc;
            }
            stp_print_config_bpdu(stp_bpdu, length);
        } else if (stp_bpdu->protocol_version == STP_PROTO_MSTP) {
            if (length < STP_BPDU_MSTP_MIN_LEN) {
                goto trunc;
            }
            if (stp_bpdu->v1_length != 0) {
                /* FIX ME: Emit a message here ? */
                goto trunc;
            }
            /* Validate v3 length */
            mstp_len = EXTRACT_16BITS(p + MST_BPDU_VER3_LEN_OFFSET);
            mstp_len += 2;  /* length encoding itself is 2 bytes */
            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;
 trunc:
    printf("[|stp %d]", length);
}

/*
 * Local Variables:
 * c-style: whitesmith
 * c-basic-offset: 4
 * End:
 */
Commit	Line	Data
c8cf0f94 PA	1	/*
	2	* Copyright (c) 2000 Lennert Buytenhek
	3	*
	4	* This software may be distributed either under the terms of the
	5	* BSD-style license that accompanies tcpdump or the GNU General
	6	* Public License
	7	*
	8	* Format and print IEEE 802.1d spanning tree protocol packets.
	9	* Contributed by Lennert Buytenhek <buytenh@gnu.org>
	10	*/
	11
	12	#ifndef lint
	13	static const char rcsid[] _U_ =
66170f0a	14	"@(#) $Header: /tcpdump/master/tcpdump/print-stp.c,v 1.13.2.7 2007/03/18 17:12:36 hannes Exp $";
c8cf0f94 PA	15	#endif
	16
	17	#ifdef HAVE_CONFIG_H
	18	#include "config.h"
	19	#endif
	20
	21	#include <tcpdump-stdinc.h>
	22
	23	#include <stdlib.h>
	24	#include <stdio.h>
	25	#include <string.h>
	26
	27	#include "interface.h"
	28	#include "addrtoname.h"
	29	#include "extract.h"
	30
66170f0a PA	31	#define RSTP_EXTRACT_PORT_ROLE(x) (((x)&0x0C)>>2)
	32	/* STP timers are expressed in multiples of 1/256th second */
	33	#define STP_TIME_BASE 256
	34	#define STP_BPDU_MSTP_MIN_LEN 102
	35
	36	struct stp_bpdu_ {
	37	u_int8_t protocol_id[2];
	38	u_int8_t protocol_version;
	39	u_int8_t bpdu_type;
	40	u_int8_t flags;
	41	u_int8_t root_id[8];
	42	u_int8_t root_path_cost[4];
	43	u_int8_t bridge_id[8];
	44	u_int8_t port_id[2];
	45	u_int8_t message_age[2];
	46	u_int8_t max_age[2];
	47	u_int8_t hello_time[2];
	48	u_int8_t forward_delay[2];
	49	u_int8_t v1_length;
	50	};
	51
	52	#define STP_PROTO_REGULAR 0x00
	53	#define STP_PROTO_RAPID 0x02
	54	#define STP_PROTO_MSTP 0x03
	55
	56	struct tok stp_proto_values[] = {
	57	{ STP_PROTO_REGULAR, "802.1d" },
	58	{ STP_PROTO_RAPID, "802.1w" },
	59	{ STP_PROTO_MSTP, "802.1s" },
	60	{ 0, NULL}
	61	};
	62
	63	#define STP_BPDU_TYPE_CONFIG 0x00
	64	#define STP_BPDU_TYPE_RSTP 0x02
	65	#define STP_BPDU_TYPE_TOPO_CHANGE 0x80
	66
	67	struct tok stp_bpdu_flag_values[] = {
	68	{ 0x01, "Topology change" },
	69	{ 0x02, "Proposal" },
	70	{ 0x10, "Learn" },
	71	{ 0x20, "Forward" },
	72	{ 0x40, "Agreement" },
	73	{ 0x80, "Topology change ACK" },
	74	{ 0, NULL}
	75	};
	76
	77	struct tok stp_bpdu_type_values[] = {
	78	{ STP_BPDU_TYPE_CONFIG, "Config" },
	79	{ STP_BPDU_TYPE_RSTP, "Rapid STP" },
	80	{ STP_BPDU_TYPE_TOPO_CHANGE, "Topology Change" },
	81	{ 0, NULL}
	82	};
	83
	84	struct tok rstp_obj_port_role_values[] = {
	85	{ 0x00, "Unknown" },
	86	{ 0x01, "Alternate" },
	87	{ 0x02, "Root" },
	88	{ 0x03, "Designated" },
	89	{ 0, NULL}
	90	};
	91
	92	static char *
c8cf0f94 PA	93	stp_print_bridge_id(const u_char *p)
c8cf0f94 PA	94	{
66170f0a PA	95	static char bridge_id_str[sizeof("pppp.aa:bb:cc:dd:ee:ff")];
	96
	97	snprintf(bridge_id_str, sizeof(bridge_id_str),
	98	"%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
	99	p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
	100
	101	return bridge_id_str;
c8cf0f94 PA	102	}
	103
	104	static void
66170f0a	105	stp_print_config_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
c8cf0f94	106	{
66170f0a PA	107	printf(", Flags [%s]",
	108	bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));
	109
	110	printf(", bridge-id %s.%04x, length %u",
	111	stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id),
	112	EXTRACT_16BITS(&stp_bpdu->port_id), length);
c8cf0f94	113
66170f0a PA	114	/* in non-verbose mode just print the bridge-id */
	115	if (!vflag) {
	116	return;
	117	}
c8cf0f94	118
66170f0a PA	119	printf("\n\tmessage-age %.2fs, max-age %.2fs"
	120	", hello-time %.2fs, forwarding-delay %.2fs",
	121	(float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
	122	(float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
	123	(float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
	124	(float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);
c8cf0f94	125
66170f0a PA	126	printf("\n\troot-id %s, root-pathcost %u",
	127	stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
	128	EXTRACT_32BITS(&stp_bpdu->root_path_cost));
c8cf0f94	129
66170f0a PA	130	/* Port role is only valid for 802.1w */
	131	if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
	132	printf(", port-role %s",
	133	tok2str(rstp_obj_port_role_values, "Unknown",
	134	RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
	135	}
c8cf0f94 PA	136	}
c8cf0f94 PA	137
66170f0a PA	138	/*
	139	* MSTP packet format
	140	* Ref. IEEE 802.1Q 2003 Ed. Section 14
	141	*
	142	* MSTP BPDU
	143	*
	144	* 2 - bytes Protocol Id
	145	* 1 - byte Protocol Ver.
	146	* 1 - byte BPDU tye
	147	* 1 - byte Flags
	148	* 8 - bytes CIST Root Identifier
	149	* 4 - bytes CIST External Path Cost
	150	* 8 - bytes CIST Regional Root Identifier
	151	* 2 - bytes CIST Port Identifier
	152	* 2 - bytes Message Age
	153	* 2 - bytes Max age
	154	* 2 - bytes Hello Time
	155	* 2 - bytes Forward delay
	156	* 1 - byte Version 1 length. Must be 0
	157	* 2 - bytes Version 3 length
	158	* 1 - byte Config Identifier
	159	* 32 - bytes Config Name
	160	* 2 - bytes Revision level
	161	* 16 - bytes Config Digest [MD5]
	162	* 4 - bytes CIST Internal Root Path Cost
	163	* 8 - bytes CIST Bridge Identifier
	164	* 1 - byte CIST Remaining Hops
	165	* 16 - bytes MSTI information [Max 64 MSTI, each 16 bytes]
	166	*
	167	* MSTI Payload
	168	*
	169	* 1 - byte MSTI flag
	170	* 8 - bytes MSTI Regional Root Identifier
	171	* 4 - bytes MSTI Regional Path Cost
	172	* 1 - byte MSTI Bridge Priority
	173	* 1 - byte MSTI Port Priority
	174	* 1 - byte MSTI Remaining Hops
	175	*/
	176
	177	#define MST_BPDU_MSTI_LENGTH 16
	178	#define MST_BPDU_CONFIG_INFO_LENGTH 64
	179
	180	/* Offsets of fields from the begginning for the packet */
	181	#define MST_BPDU_VER3_LEN_OFFSET 36
	182	#define MST_BPDU_CONFIG_NAME_OFFSET 39
	183	#define MST_BPDU_CONFIG_DIGEST_OFFSET 73
	184	#define MST_BPDU_CIST_INT_PATH_COST_OFFSET 89
	185	#define MST_BPDU_CIST_BRIDGE_ID_OFFSET 93
	186	#define MST_BPDU_CIST_REMAIN_HOPS_OFFSET 101
	187	#define MST_BPDU_MSTI_OFFSET 102
	188	/* Offsets within an MSTI */
	189	#define MST_BPDU_MSTI_ROOT_PRIO_OFFSET 1
	190	#define MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET 9
	191	#define MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET 13
	192	#define MST_BPDU_MSTI_PORT_PRIO_OFFSET 14
	193	#define MST_BPDU_MSTI_REMAIN_HOPS_OFFSET 15
	194
c8cf0f94	195	static void
66170f0a	196	stp_print_mstp_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
c8cf0f94	197	{
66170f0a PA	198	const u_char *ptr;
	199	u_int16_t v3len;
	200	u_int16_t len;
	201	u_int16_t msti;
	202	u_int16_t offset;
	203
	204	ptr = (const u_char *)stp_bpdu;
	205	printf(", CIST Flags [%s]",
	206	bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));
	207
	208	/*
	209	* in non-verbose mode just print the flags. We dont read that much
	210	* of the packet (DEFAULT_SNAPLEN) to print out cist bridge-id
	211	*/
	212	if (!vflag) {
	213	return;
	214	}
	215
	216	printf(", CIST bridge-id %s.%04x, length %u",
	217	stp_print_bridge_id(ptr + MST_BPDU_CIST_BRIDGE_ID_OFFSET),
	218	EXTRACT_16BITS(&stp_bpdu->port_id), length);
	219
	220
	221	printf("\n\tmessage-age %.2fs, max-age %.2fs"
	222	", hello-time %.2fs, forwarding-delay %.2fs",
	223	(float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
	224	(float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
	225	(float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
	226	(float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);
	227
	228	printf("\n\tCIST root-id %s, ext-pathcost %u int-pathcost %u",
	229	stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
	230	EXTRACT_32BITS(&stp_bpdu->root_path_cost),
	231	EXTRACT_32BITS(ptr + MST_BPDU_CIST_INT_PATH_COST_OFFSET));
	232
	233	printf(", port-role %s",
	234	tok2str(rstp_obj_port_role_values, "Unknown",
	235	RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
	236
	237	printf("\n\tCIST regional-root-id %s",
	238	stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id));
	239
	240	printf("\n\tMSTP Configuration Name %s, revision %u, digest %08x%08x%08x%08x",
	241	ptr + MST_BPDU_CONFIG_NAME_OFFSET,
	242	EXTRACT_16BITS(ptr + MST_BPDU_CONFIG_NAME_OFFSET + 32),
	243	EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET),
	244	EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 4),
	245	EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 8),
	246	EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 12));
	247
	248	printf("\n\tCIST remaining-hops %d", ptr[MST_BPDU_CIST_REMAIN_HOPS_OFFSET]);
	249
	250	/* Dump all MSTI's */
	251	v3len = EXTRACT_16BITS(ptr + MST_BPDU_VER3_LEN_OFFSET);
	252	if (v3len > MST_BPDU_CONFIG_INFO_LENGTH) {
	253	len = v3len - MST_BPDU_CONFIG_INFO_LENGTH;
	254	offset = MST_BPDU_MSTI_OFFSET;
	255	while (len >= MST_BPDU_MSTI_LENGTH) {
	256	msti = EXTRACT_16BITS(ptr + offset +
	257	MST_BPDU_MSTI_ROOT_PRIO_OFFSET);
	258	msti = msti & 0x0FFF;
	259
	260	printf("\n\tMSTI %d, Flags [%s], port-role %s",
	261	msti, bittok2str(stp_bpdu_flag_values, "none", ptr[offset]),
262	tok2str(rstp_obj_port_role_values, "Unknown",
263	RSTP_EXTRACT_PORT_ROLE(ptr[offset])));
264	printf("\n\t\tMSTI regional-root-id %s, pathcost %u",
265	stp_print_bridge_id(ptr + offset +
266	MST_BPDU_MSTI_ROOT_PRIO_OFFSET),
267	EXTRACT_32BITS(ptr + offset +
268	MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET));
269	printf("\n\t\tMSTI bridge-prio %d, port-prio %d, hops %d",
270	ptr[offset + MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET] >> 4,
271	ptr[offset + MST_BPDU_MSTI_PORT_PRIO_OFFSET] >> 4,
272	ptr[offset + MST_BPDU_MSTI_REMAIN_HOPS_OFFSET]);
273
274	len -= MST_BPDU_MSTI_LENGTH;
275	offset += MST_BPDU_MSTI_LENGTH;
276	}
277	}
c8cf0f94 PA	278	}
	279
	280	/*
66170f0a	281	* Print 802.1d / 802.1w / 802.1q (mstp) packets.
c8cf0f94 PA	282	*/
	283	void
	284	stp_print(const u_char *p, u_int length)
	285	{
66170f0a PA	286	const struct stp_bpdu_ *stp_bpdu;
	287	u_int16_t mstp_len;
	288
	289	stp_bpdu = (struct stp_bpdu_*)p;
	290
	291	/* Minimum STP Frame size. */
	292	if (length < 4)
	293	goto trunc;
	294
	295	if (EXTRACT_16BITS(&stp_bpdu->protocol_id)) {
	296	printf("unknown STP version, length %u", length);
	297	return;
	298	}
	299
	300	printf("STP %s", tok2str(stp_proto_values, "Unknown STP protocol (0x%02x)",
	301	stp_bpdu->protocol_version));
	302
	303	switch (stp_bpdu->protocol_version) {
	304	case STP_PROTO_REGULAR:
	305	case STP_PROTO_RAPID:
	306	case STP_PROTO_MSTP:
	307	break;
	308	default:
	309	return;
	310	}
	311
	312	printf(", %s", tok2str(stp_bpdu_type_values, "Unknown BPDU Type (0x%02x)",
	313	stp_bpdu->bpdu_type));
	314
	315	switch (stp_bpdu->bpdu_type) {
	316	case STP_BPDU_TYPE_CONFIG:
	317	if (length < sizeof(struct stp_bpdu_) - 1) {
	318	goto trunc;
	319	}
	320	stp_print_config_bpdu(stp_bpdu, length);
	321	break;
	322
	323	case STP_BPDU_TYPE_RSTP:
	324	if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
	325	if (length < sizeof(struct stp_bpdu_)) {
	326	goto trunc;
	327	}
	328	stp_print_config_bpdu(stp_bpdu, length);
	329	} else if (stp_bpdu->protocol_version == STP_PROTO_MSTP) {
	330	if (length < STP_BPDU_MSTP_MIN_LEN) {
	331	goto trunc;
	332	}
	333	if (stp_bpdu->v1_length != 0) {
	334	/* FIX ME: Emit a message here ? */
	335	goto trunc;
	336	}
	337	/* Validate v3 length */
	338	mstp_len = EXTRACT_16BITS(p + MST_BPDU_VER3_LEN_OFFSET);
	339	mstp_len += 2; /* length encoding itself is 2 bytes */
	340	if (length < (sizeof(struct stp_bpdu_) + mstp_len)) {
	341	goto trunc;
	342	}
	343	stp_print_mstp_bpdu(stp_bpdu, length);
	344	}
	345	break;
	346
	347	case STP_BPDU_TYPE_TOPO_CHANGE:
	348	/* always empty message - just break out */
	349	break;
350
351	default:
352	break;
353	}
354
355	return;
356	trunc:
357	printf("[\|stp %d]", length);
c8cf0f94	358	}
66170f0a PA	359
	360	/*
	361	* Local Variables:
	362	* c-style: whitesmith
	363	* c-basic-offset: 4
	364	* End:
	365	*/