forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
Part 2 of a few Change-Id: Ic1f1aafe2ed02dce95b15c03a91cbd68807a5cf4 Reviewed-on: https://code.wireshark.org/review/8165 Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com> Reviewed-by: Michael Mann <mmann78@netscape.net>
576 lines
20 KiB
C
576 lines
20 KiB
C
/* packet-lacp.c
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* Routines for Link Aggregation Control Protocol dissection.
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* IEEE Std 802.1AX
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*
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* Copyright 2002 Steve Housley <steve_housley@3com.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/slow_protocol_subtypes.h>
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/* General declarations */
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void proto_register_lacp(void);
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void proto_reg_handoff_lacp(void);
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/* Actor and Partner Flag bits */
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#define LACPDU_FLAGS_ACTIVITY 0x01
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#define LACPDU_FLAGS_TIMEOUT 0x02
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#define LACPDU_FLAGS_AGGREGATION 0x04
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#define LACPDU_FLAGS_SYNC 0x08
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#define LACPDU_FLAGS_COLLECTING 0x10
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#define LACPDU_FLAGS_DISTRIB 0x20
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#define LACPDU_FLAGS_DEFAULTED 0x40
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#define LACPDU_FLAGS_EXPIRED 0x80
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/* Initialise the protocol and registered fields */
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static int proto_lacp = -1;
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static int hf_lacp_version_number = -1;
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static int hf_lacp_actor_type = -1;
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static int hf_lacp_actor_info_len = -1;
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static int hf_lacp_actor_sys_priority = -1;
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static int hf_lacp_actor_sys = -1;
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static int hf_lacp_actor_key = -1;
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static int hf_lacp_actor_port_priority = -1;
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static int hf_lacp_actor_port = -1;
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static int hf_lacp_actor_state = -1;
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static int hf_lacp_flags_a_activity = -1;
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static int hf_lacp_flags_a_timeout = -1;
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static int hf_lacp_flags_a_aggregation = -1;
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static int hf_lacp_flags_a_sync = -1;
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static int hf_lacp_flags_a_collecting = -1;
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static int hf_lacp_flags_a_distrib = -1;
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static int hf_lacp_flags_a_defaulted = -1;
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static int hf_lacp_flags_a_expired = -1;
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static int hf_lacp_actor_reserved = -1;
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static int hf_lacp_partner_type = -1;
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static int hf_lacp_partner_info_len = -1;
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static int hf_lacp_partner_sys_priority = -1;
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static int hf_lacp_partner_sys = -1;
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static int hf_lacp_partner_key = -1;
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static int hf_lacp_partner_port_priority = -1;
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static int hf_lacp_partner_port = -1;
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static int hf_lacp_partner_state = -1;
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static int hf_lacp_flags_p_activity = -1;
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static int hf_lacp_flags_p_timeout = -1;
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static int hf_lacp_flags_p_aggregation = -1;
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static int hf_lacp_flags_p_sync = -1;
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static int hf_lacp_flags_p_collecting = -1;
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static int hf_lacp_flags_p_distrib = -1;
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static int hf_lacp_flags_p_defaulted = -1;
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static int hf_lacp_flags_p_expired = -1;
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static int hf_lacp_partner_reserved = -1;
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static int hf_lacp_coll_type = -1;
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static int hf_lacp_coll_info_len = -1;
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static int hf_lacp_coll_max_delay = -1;
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static int hf_lacp_coll_reserved = -1;
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static int hf_lacp_term_type = -1;
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static int hf_lacp_term_len = -1;
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static int hf_lacp_term_reserved = -1;
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/* Initialise the subtree pointers */
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static gint ett_lacp = -1;
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static gint ett_lacp_a_flags = -1;
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static gint ett_lacp_p_flags = -1;
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/*
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* Name: dissect_lacp
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*
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* Description:
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* This function is used to dissect the Link Aggregation Control Protocol
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* defined in IEEE 802.1AX
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*
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* Input Arguments:
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* tvb: buffer associated with the rcv packet (see tvbuff.h).
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* pinfo: structure associated with the rcv packet (see packet_info.h).
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* tree: the protocol tree associated with the rcv packet (see proto.h).
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*
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* Return Values: None
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*
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* Notes:
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*/
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static void
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dissect_lacp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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guint16 raw_word;
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guint8 raw_octet;
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proto_tree *lacpdu_tree;
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proto_item *lacpdu_item;
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static const int * actor_flags[] = {
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&hf_lacp_flags_a_activity,
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&hf_lacp_flags_a_timeout,
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&hf_lacp_flags_a_aggregation,
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&hf_lacp_flags_a_sync,
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&hf_lacp_flags_a_collecting,
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&hf_lacp_flags_a_distrib,
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&hf_lacp_flags_a_defaulted,
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&hf_lacp_flags_a_expired,
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NULL
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};
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static const int * partner_flags[] = {
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&hf_lacp_flags_p_activity,
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&hf_lacp_flags_p_timeout,
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&hf_lacp_flags_p_aggregation,
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&hf_lacp_flags_p_sync,
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&hf_lacp_flags_p_collecting,
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&hf_lacp_flags_p_distrib,
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&hf_lacp_flags_p_defaulted,
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&hf_lacp_flags_p_expired,
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NULL
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};
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LACP");
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col_set_str(pinfo->cinfo, COL_INFO, "Link Aggregation Control Protocol");
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/* Add LACP Heading */
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lacpdu_item = proto_tree_add_protocol_format(tree, proto_lacp, tvb,
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0, -1, "Link Aggregation Control Protocol");
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lacpdu_tree = proto_item_add_subtree(lacpdu_item, ett_lacp);
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/* Version Number */
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raw_octet = tvb_get_guint8(tvb, offset);
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col_append_fstr(pinfo->cinfo, COL_INFO, "Version %d. ", raw_octet);
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proto_tree_add_uint(lacpdu_tree, hf_lacp_version_number, tvb,
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offset, 1, raw_octet);
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offset += 1;
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/* Actor Type */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_type, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Actor Info Length */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_info_len, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Actor System Priority */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_sys_priority, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Actor System */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_sys, tvb,
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offset, 6, ENC_NA);
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offset += 6;
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/* Actor Key */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_key, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Actor Port Priority */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_port_priority, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Actor Port */
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raw_word = tvb_get_ntohs(tvb, offset);
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col_append_fstr(pinfo->cinfo, COL_INFO, "Actor Port = %d ", raw_word);
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proto_tree_add_uint(lacpdu_tree, hf_lacp_actor_port, tvb,
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offset, 2, raw_word);
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offset += 2;
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/* Actor State */
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proto_tree_add_bitmask_with_flags(lacpdu_tree, tvb, offset, hf_lacp_actor_state,
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ett_lacp_a_flags, actor_flags, ENC_NA, BMT_NO_INT|BMT_NO_TFS|BMT_NO_FALSE);
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offset += 1;
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/* Actor Reserved */
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proto_tree_add_item(lacpdu_tree, hf_lacp_actor_reserved, tvb,
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offset, 3, ENC_NA);
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offset += 3;
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/* Partner Type */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_type, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Partner Info Length */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_info_len, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Partner System Priority */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_sys_priority, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Partner System */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_sys, tvb,
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offset, 6, ENC_NA);
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offset += 6;
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/* Partner Key */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_key, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Partner Port Priority */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_port_priority, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Partner Port */
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raw_word = tvb_get_ntohs(tvb, offset);
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col_append_fstr(pinfo->cinfo, COL_INFO, "Partner Port = %d ", raw_word);
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proto_tree_add_uint(lacpdu_tree, hf_lacp_partner_port, tvb,
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offset, 2, raw_word);
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offset += 2;
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if (tree)
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{
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proto_tree_add_bitmask_with_flags(lacpdu_tree, tvb, offset, hf_lacp_partner_state,
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ett_lacp_p_flags, partner_flags, ENC_NA, BMT_NO_INT|BMT_NO_TFS|BMT_NO_FALSE);
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offset += 1;
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/* Partner Reserved */
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proto_tree_add_item(lacpdu_tree, hf_lacp_partner_reserved, tvb,
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offset, 3, ENC_NA);
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offset += 3;
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/* Collector Type */
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proto_tree_add_item(lacpdu_tree, hf_lacp_coll_type, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Collector Info Length */
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proto_tree_add_item(lacpdu_tree, hf_lacp_coll_info_len, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Collector Max Delay */
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proto_tree_add_item(lacpdu_tree, hf_lacp_coll_max_delay, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Collector Reserved */
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proto_tree_add_item(lacpdu_tree, hf_lacp_coll_reserved, tvb,
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offset, 12, ENC_NA);
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offset += 12;
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/* Terminator Type */
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proto_tree_add_item(lacpdu_tree, hf_lacp_term_type, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Terminator Info Length */
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proto_tree_add_item(lacpdu_tree, hf_lacp_term_len, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* Terminator Reserved */
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proto_tree_add_item(lacpdu_tree, hf_lacp_term_reserved, tvb,
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offset, 50, ENC_NA);
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}
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}
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/* Register the protocol with Wireshark */
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void
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proto_register_lacp(void)
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{
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_lacp_version_number,
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{ "LACP Version Number", "lacp.version",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"Identifies the LACP version", HFILL }},
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{ &hf_lacp_actor_type,
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{ "Actor Information", "lacp.actorInfo",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"TLV type = Actor", HFILL }},
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{ &hf_lacp_actor_info_len,
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{ "Actor Information Length", "lacp.actorInfoLen",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"The length of the Actor TLV", HFILL }},
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{ &hf_lacp_actor_sys_priority,
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{ "Actor System Priority", "lacp.actorSysPriority",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The priority assigned to this System by management or admin", HFILL }},
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{ &hf_lacp_actor_sys,
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{ "Actor System", "lacp.actorSystem",
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FT_ETHER, BASE_NONE, NULL, 0x0,
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"The Actor's System ID encoded as a MAC address", HFILL }},
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{ &hf_lacp_actor_key,
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{ "Actor Key", "lacp.actorKey",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The operational Key value assigned to the port by the Actor", HFILL }},
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{ &hf_lacp_actor_port_priority,
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{ "Actor Port Priority", "lacp.actorPortPriority",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The priority assigned to the port by the Actor (via Management or Admin)", HFILL }},
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{ &hf_lacp_actor_port,
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{ "Actor Port", "lacp.actorPort",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The port number assigned to the port by the Actor (via Management or Admin)", HFILL }},
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{ &hf_lacp_actor_state,
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{ "Actor State", "lacp.actorState",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"The Actor's state variables for the port, encoded as bits within a single octet", HFILL }},
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{ &hf_lacp_flags_a_activity,
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{ "LACP Activity", "lacp.actorState.activity",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_ACTIVITY,
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"Activity control value for this link. Active = 1, Passive = 0", HFILL }},
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{ &hf_lacp_flags_a_timeout,
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{ "LACP Timeout", "lacp.actorState.timeout",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_TIMEOUT,
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"Timeout control value for this link. Short Timeout = 1, Long Timeout = 0", HFILL }},
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{ &hf_lacp_flags_a_aggregation,
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{ "Aggregation", "lacp.actorState.aggregation",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_AGGREGATION,
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"Aggregatable = 1, Individual = 0", HFILL }},
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{ &hf_lacp_flags_a_sync,
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{ "Synchronization", "lacp.actorState.synchronization",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_SYNC,
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"In Sync = 1, Out of Sync = 0", HFILL }},
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{ &hf_lacp_flags_a_collecting,
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{ "Collecting", "lacp.actorState.collecting",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_COLLECTING,
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"Collection of incoming frames is: Enabled = 1, Disabled = 0", HFILL }},
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{ &hf_lacp_flags_a_distrib,
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{ "Distributing", "lacp.actorState.distributing",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_DISTRIB,
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"Distribution of outgoing frames is: Enabled = 1, Disabled = 0", HFILL }},
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{ &hf_lacp_flags_a_defaulted,
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{ "Defaulted", "lacp.actorState.defaulted",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_DEFAULTED,
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"1 = Actor Rx machine is using DEFAULT Partner info, 0 = using info in Rx'd LACPDU", HFILL }},
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{ &hf_lacp_flags_a_expired,
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{ "Expired", "lacp.actorState.expired",
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FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_EXPIRED,
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"1 = Actor Rx machine is EXPIRED, 0 = is NOT EXPIRED", HFILL }},
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{ &hf_lacp_actor_reserved,
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{ "Reserved", "lacp.reserved",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_lacp_partner_type,
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{ "Partner Information", "lacp.partnerInfo",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"TLV type = Partner", HFILL }},
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{ &hf_lacp_partner_info_len,
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{ "Partner Information Length", "lacp.partnerInfoLen",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"The length of the Partner TLV", HFILL }},
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{ &hf_lacp_partner_sys_priority,
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{ "Partner System Priority", "lacp.partnerSysPriority",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The priority assigned to the Partner System by management or admin", HFILL }},
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{ &hf_lacp_partner_sys,
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{ "Partner System", "lacp.partnerSystem",
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FT_ETHER, BASE_NONE, NULL, 0x0,
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"The Partner's System ID encoded as a MAC address", HFILL }},
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{ &hf_lacp_partner_key,
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{ "Partner Key", "lacp.partnerKey",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The operational Key value assigned to the port associated with this link by the Partner", HFILL }},
|
|
|
|
{ &hf_lacp_partner_port_priority,
|
|
{ "Partner Port Priority", "lacp.partnerPortPriority",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"The priority assigned to the port by the Partner (via Management or Admin)", HFILL }},
|
|
|
|
{ &hf_lacp_partner_port,
|
|
{ "Partner Port", "lacp.partnerPort",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"The port number associated with this link assigned to the port by the Partner (via Management or Admin)", HFILL }},
|
|
|
|
{ &hf_lacp_partner_state,
|
|
{ "Partner State", "lacp.partnerState",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"The Partner's state variables for the port, encoded as bits within a single octet", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_activity,
|
|
{ "LACP Activity", "lacp.partnerState.activity",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_ACTIVITY,
|
|
"Activity control value for this link. Active = 1, Passive = 0", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_timeout,
|
|
{ "LACP Timeout", "lacp.partnerState.timeout",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_TIMEOUT,
|
|
"Timeout control value for this link. Short Timeout = 1, Long Timeout = 0", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_aggregation,
|
|
{ "Aggregation", "lacp.partnerState.aggregation",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_AGGREGATION,
|
|
"Aggregatable = 1, Individual = 0", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_sync,
|
|
{ "Synchronization", "lacp.partnerState.synchronization",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_SYNC,
|
|
"In Sync = 1, Out of Sync = 0", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_collecting,
|
|
{ "Collecting", "lacp.partnerState.collecting",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_COLLECTING,
|
|
"Collection of incoming frames is: Enabled = 1, Disabled = 0", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_distrib,
|
|
{ "Distributing", "lacp.partnerState.distributing",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_DISTRIB,
|
|
"Distribution of outgoing frames is: Enabled = 1, Disabled = 0", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_defaulted,
|
|
{ "Defaulted", "lacp.partnerState.defaulted",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_DEFAULTED,
|
|
"1 = Actor Rx machine is using DEFAULT Partner info, 0 = using info in Rx'd LACPDU", HFILL }},
|
|
|
|
{ &hf_lacp_flags_p_expired,
|
|
{ "Expired", "lacp.partnerState.expired",
|
|
FT_BOOLEAN, 8, TFS(&tfs_yes_no), LACPDU_FLAGS_EXPIRED,
|
|
"1 = Actor Rx machine is EXPIRED, 0 = is NOT EXPIRED", HFILL }},
|
|
|
|
{ &hf_lacp_partner_reserved,
|
|
{ "Reserved", "lacp.reserved",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_lacp_coll_type,
|
|
{ "Collector Information", "lacp.collectorInfo",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"TLV type = Collector", HFILL }},
|
|
|
|
{ &hf_lacp_coll_info_len,
|
|
{ "Collector Information Length", "lacp.collectorInfoLen",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"The length of the Collector TLV", HFILL }},
|
|
|
|
{ &hf_lacp_coll_max_delay,
|
|
{ "Collector Max Delay", "lacp.collectorMaxDelay",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"The max delay of the station tx'ing the LACPDU (in tens of usecs)", HFILL }},
|
|
|
|
{ &hf_lacp_coll_reserved,
|
|
{ "Reserved", "lacp.coll_reserved",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_lacp_term_type,
|
|
{ "Terminator Information", "lacp.termInfo",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"TLV type = Terminator", HFILL }},
|
|
|
|
{ &hf_lacp_term_len,
|
|
{ "Terminator Length", "lacp.termLen",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"The length of the Terminator TLV", HFILL }},
|
|
|
|
{ &hf_lacp_term_reserved,
|
|
{ "Reserved", "lacp.term_reserved",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
&ett_lacp,
|
|
&ett_lacp_a_flags,
|
|
&ett_lacp_p_flags,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_lacp = proto_register_protocol("LACP", "Link Aggregation Control Protocol", "lacp");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_lacp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_lacp(void)
|
|
{
|
|
dissector_handle_t lacp_handle;
|
|
|
|
lacp_handle = create_dissector_handle(dissect_lacp, proto_lacp);
|
|
dissector_add_uint("slow.subtype", LACP_SUBTYPE, lacp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|