diff options
Diffstat (limited to 'contrib/tcpdump/print-stp.c')
-rw-r--r-- | contrib/tcpdump/print-stp.c | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/contrib/tcpdump/print-stp.c b/contrib/tcpdump/print-stp.c deleted file mode 100644 index 4308ae0..0000000 --- a/contrib/tcpdump/print-stp.c +++ /dev/null @@ -1,365 +0,0 @@ -/* - * 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: - */ |