449 lines
12 KiB
C
449 lines
12 KiB
C
/* packet-ecp-oui.c
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* ECP/VDP dissector for wireshark (according to IEEE 802.1Qbg draft 0)
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* By Jens Osterkamp <jens at linux.vnet.ibm.com>
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* Mijo Safradin <mijo at linux.vnet.ibm.com>
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* Copyright 2011,2012 IBM Corp.
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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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/addr_resolv.h>
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#include <epan/oui.h>
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#include <epan/addr_resolv.h>
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#include <wsutil/str_util.h>
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#include "packet-ieee802a.h"
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void proto_register_ecp_oui(void);
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void proto_reg_handoff_ecp(void);
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#define ECP_SUBTYPE 0x00
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#define END_OF_VDPDU_TLV_TYPE 0x00 /* Mandatory */
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#define VDP_TLV_TYPE 0x02
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#define ORG_SPECIFIC_TLV_TYPE 0x7F
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/* IEEE 802.1Qbg VDP filter info formats */
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#define VDP_FIF_VID 0x01
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#define VDP_FIF_MACVID 0x02
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#define VDP_FIF_GROUPVID 0x03
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#define VDP_FIF_GROUPVMACVID 0x04
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/* Masks */
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#define TLV_TYPE_MASK 0xFE00
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#define TLV_TYPE(value) (((value) & TLV_TYPE_MASK) >> 9)
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#define TLV_INFO_LEN_MASK 0x01FF
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#define TLV_INFO_LEN(value) ((value) & TLV_INFO_LEN_MASK)
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static gint proto_ecp = -1;
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static gint hf_ecp_pid = -1;
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static gint hf_ecp_tlv_type = -1;
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static gint hf_ecp_tlv_len = -1;
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static gint hf_ecp_subtype = -1;
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static gint hf_ecp_mode = -1;
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static gint hf_ecp_sequence = -1;
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/* static gint hf_ecp_vdp_oui = -1; */
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static gint hf_ecp_vdp_mode = -1;
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static gint hf_ecp_vdp_response = -1;
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static gint hf_ecp_vdp_mgrid = -1;
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static gint hf_ecp_vdp_vsitypeid = -1;
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static gint hf_ecp_vdp_vsitypeidversion = -1;
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static gint hf_ecp_vdp_instanceid = -1;
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static gint hf_ecp_vdp_format = -1;
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static gint hf_ecp_vdp_mac = -1;
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static gint hf_ecp_vdp_vlan = -1;
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static gint ett_ecp = -1;
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static gint ett_end_of_vdpdu = -1;
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static gint ett_802_1qbg_capabilities_flags = -1;
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static dissector_handle_t ecp_handle;
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static const value_string ecp_pid_vals[] = {
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{ 0x0000, "ECP draft 0" },
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{ 0, NULL }
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};
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/* IEEE 802.1Qbg ECP subtypes */
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static const value_string ecp_subtypes[] = {
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{ 0x00, "ECP default subtype" },
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{ 0, NULL }
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};
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/* IEEE 802.1Qbg ECP modes */
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static const value_string ecp_modes[] = {
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{ 0x00, "REQUEST" },
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{ 0x01, "ACK" },
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{ 0, NULL }
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};
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/* IEEE 802.1Qbg VDP modes */
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static const value_string ecp_vdp_modes[] = {
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{ 0x00, "Pre-Associate" },
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{ 0x01, "Pre-Associate with resource reservation" },
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{ 0x02, "Associate" },
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{ 0x03, "De-Associate" },
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{ 0, NULL }
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};
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/* IEEE 802.1Qbg VDP responses */
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static const value_string ecp_vdp_responses[] = {
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{ 0x00, "success" },
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{ 0x01, "invalid format" },
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{ 0x02, "insufficient resources" },
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{ 0x03, "unused VTID" },
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{ 0x04, "VTID violation" },
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{ 0x05, "VTID version violation" },
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{ 0x06, "out of sync" },
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{ 0, NULL }
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};
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/* IEEE 802.1Qbg VDP filter info formats */
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static const value_string ecp_vdp_formats[] = {
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{ VDP_FIF_VID, "VID values" },
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{ VDP_FIF_MACVID, "MAC/VID pairs" },
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{ VDP_FIF_GROUPVID, "GROUPID/VID pairs" },
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{ VDP_FIF_GROUPVMACVID, "GROUPID/MAC/VID triples" },
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{ 0, NULL }
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};
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/* IEEE 802.1Qbg Subtypes */
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static const value_string ieee_802_1qbg_subtypes[] = {
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{ 0x00, "EVB" },
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{ 0x01, "CDCP" },
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{ 0x02, "VDP" },
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{ 0, NULL }
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};
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/* Dissect Unknown TLV */
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static gint32
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dissect_ecp_unknown_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
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{
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guint16 tempLen;
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guint16 tempShort;
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proto_tree *ecp_unknown_tlv_tree;
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/* Get tlv type and length */
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tempShort = tvb_get_ntohs(tvb, offset);
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/* Get tlv length */
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tempLen = TLV_INFO_LEN(tempShort);
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ecp_unknown_tlv_tree = proto_tree_add_subtree(tree, tvb, offset, (tempLen + 2), ett_ecp, NULL, "Unknown TLV");
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proto_tree_add_item(ecp_unknown_tlv_tree, hf_ecp_subtype, tvb, offset, 2, ENC_BIG_ENDIAN);
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return -1;
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}
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/* Dissect mac/vid pairs in VDP TLVs */
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static gint32
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dissect_vdp_fi_macvid(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
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{
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gint i;
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guint16 entries;
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guint32 tempOffset = offset;
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proto_tree *ecp_vdp_tlv_fi_subtree;
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entries = tvb_get_ntohs(tvb, offset);
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ecp_vdp_tlv_fi_subtree = proto_tree_add_subtree_format(tree, tvb, tempOffset, 2, ett_ecp, NULL,
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"%i MAC/VID pair%s", entries, plurality(entries, "", "s"));
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tempOffset += 2;
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for (i=0; i < entries; i++) {
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proto_tree_add_item(ecp_vdp_tlv_fi_subtree, hf_ecp_vdp_mac, tvb, tempOffset, 6, ENC_NA);
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tempOffset += 6;
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proto_tree_add_item(ecp_vdp_tlv_fi_subtree, hf_ecp_vdp_vlan, tvb, tempOffset, 2, ENC_BIG_ENDIAN);
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tempOffset += 2;
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}
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return tempOffset-offset;
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}
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/* Dissect Organizationally Defined TLVs */
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static gint32
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dissect_vdp_org_specific_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
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{
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guint16 tempLen;
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guint16 len;
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guint16 tempShort;
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guint32 tempOffset = offset;
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guint32 oui;
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const char *ouiStr;
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guint8 subType, format;
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const char *subTypeStr;
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proto_tree *ecp_vdp_tlv_subtree;
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tempLen = 0;
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tempShort = tvb_get_ntohs(tvb, offset);
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len = TLV_INFO_LEN(tempShort);
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tempOffset += 2;
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oui = tvb_get_ntoh24(tvb, (tempOffset));
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/* Look in manuf database for OUI */
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ouiStr = uint_get_manuf_name_if_known(oui);
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if(ouiStr==NULL) ouiStr="Unknown";
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tempOffset += 3;
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subType = tvb_get_guint8(tvb, tempOffset);
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tempOffset++;
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switch(oui) {
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case OUI_IEEE_802_1QBG:
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subTypeStr = val_to_str(subType, ieee_802_1qbg_subtypes, "Unknown subtype 0x%x");
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break;
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default:
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subTypeStr = "Unknown";
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break;
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}
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ecp_vdp_tlv_subtree = proto_tree_add_subtree_format(tree, tvb, offset, (len + 2), ett_ecp, NULL,
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"%s - %s", ouiStr, subTypeStr);
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_mode, tvb, tempOffset, 1, ENC_BIG_ENDIAN);
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tempOffset++;
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_response, tvb, tempOffset, 1, ENC_BIG_ENDIAN);
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tempOffset++;
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_mgrid, tvb, tempOffset, 1, ENC_BIG_ENDIAN);
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tempOffset++;
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_vsitypeid, tvb, tempOffset, 3, ENC_BIG_ENDIAN);
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tempOffset += 3;
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_vsitypeidversion, tvb, tempOffset, 1, ENC_BIG_ENDIAN);
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tempOffset += 1;
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_instanceid, tvb, tempOffset, 16, ENC_NA);
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tempOffset += 16;
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format = tvb_get_guint8(tvb, tempOffset);
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proto_tree_add_item(ecp_vdp_tlv_subtree, hf_ecp_vdp_format, tvb, tempOffset, 1, ENC_BIG_ENDIAN);
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tempOffset++;
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switch (format) {
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case VDP_FIF_VID:
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/* place holder for future enablement */
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/* For compatibility of different implementations proceed to next entry */
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case VDP_FIF_MACVID:
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tempLen = dissect_vdp_fi_macvid(tvb, pinfo, ecp_vdp_tlv_subtree, tempOffset);
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break;
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case VDP_FIF_GROUPVID:
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/* place holder for future enablement */
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break;
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case VDP_FIF_GROUPVMACVID:
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/* place holder for future enablement */
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break;
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default:
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break;
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}
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tempOffset += tempLen;
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return tempOffset-offset;
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}
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/* Dissect End of VDP TLV (Mandatory) */
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static gint32
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dissect_vdp_end_of_vdpdu_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
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{
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guint16 tempLen;
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guint16 tempShort;
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proto_tree *end_of_vdpdu_tree;
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/* Get tlv type and length */
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tempShort = tvb_get_ntohs(tvb, offset);
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/* Get tlv length */
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tempLen = TLV_INFO_LEN(tempShort);
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if (tree)
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{
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/* Set port tree */
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end_of_vdpdu_tree = proto_tree_add_subtree(tree, tvb, offset, (tempLen + 2),
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ett_end_of_vdpdu, NULL, "End of VDPDU");
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proto_tree_add_item(end_of_vdpdu_tree, hf_ecp_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(end_of_vdpdu_tree, hf_ecp_tlv_len, tvb, offset, 2, ENC_BIG_ENDIAN);
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}
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return -1; /* Force the VDP dissector to terminate */
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}
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static int
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dissect_ecp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *ecp_tree;
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proto_item *ti;
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gint32 tempLen = 0;
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guint32 offset = 0;
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guint16 tempShort;
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guint8 tempType;
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gboolean end = FALSE;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ECP");
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ti = proto_tree_add_item(tree, proto_ecp, tvb, 0, -1, ENC_NA);
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ecp_tree = proto_item_add_subtree(ti, ett_ecp);
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proto_tree_add_item(ecp_tree, hf_ecp_subtype, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(ecp_tree, hf_ecp_mode, tvb, offset+1, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(ecp_tree, hf_ecp_sequence, tvb, offset+2, 2, ENC_BIG_ENDIAN);
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offset += 4;
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while (!end) {
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if (!tvb_bytes_exist(tvb, offset, 1))
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break;
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tempShort = tvb_get_ntohs(tvb, offset);
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tempType = TLV_TYPE(tempShort);
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switch (tempType) {
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case ORG_SPECIFIC_TLV_TYPE:
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tempLen = dissect_vdp_org_specific_tlv(tvb, pinfo, ecp_tree, offset);
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break;
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case END_OF_VDPDU_TLV_TYPE:
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tempLen = dissect_vdp_end_of_vdpdu_tlv(tvb, pinfo, ecp_tree, offset);
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break;
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default:
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tempLen = dissect_ecp_unknown_tlv(tvb, pinfo, ecp_tree, offset);
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break;
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}
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offset += tempLen;
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if (tempLen < 0)
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end = TRUE;
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}
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return tvb_captured_length(tvb);
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}
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void proto_register_ecp_oui(void)
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{
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static hf_register_info hf_reg = {
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&hf_ecp_pid,
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{ "PID", "ieee802a.ecp_pid", FT_UINT16, BASE_HEX,
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VALS(ecp_pid_vals), 0x0, NULL, HFILL },
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};
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static hf_register_info hf[] = {
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{ &hf_ecp_tlv_type,
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{ "TLV Type", "ecp.tlv.type", FT_UINT16, BASE_DEC,
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NULL, TLV_TYPE_MASK, NULL, HFILL }
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},
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{ &hf_ecp_tlv_len,
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{ "TLV Length", "ecp.tlv.len", FT_UINT16, BASE_DEC,
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NULL, TLV_INFO_LEN_MASK, NULL, HFILL }
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},
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{ &hf_ecp_subtype,
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{ "subtype", "ecp.subtype", FT_UINT8, BASE_HEX,
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VALS(ecp_subtypes), 0x0, NULL, HFILL },
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},
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{ &hf_ecp_mode,
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{ "mode", "ecp.mode", FT_UINT8, BASE_HEX,
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VALS(ecp_modes), 0x0, NULL, HFILL },
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},
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{ &hf_ecp_sequence,
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{ "sequence number", "ecp.seq", FT_UINT16, BASE_HEX,
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NULL, 0x0, NULL, HFILL },
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},
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#if 0
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{ &hf_ecp_vdp_oui,
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{ "Organization Unique Code", "ecp.vdp.oui", FT_UINT24, BASE_OUI,
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NULL, 0x0, NULL, HFILL }
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},
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#endif
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{ &hf_ecp_vdp_mode,
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{ "mode", "ecp.vdp.mode", FT_UINT8, BASE_HEX,
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VALS(ecp_vdp_modes), 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_response,
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{ "response", "ecp.vdp.response", FT_UINT8, BASE_HEX,
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VALS(ecp_vdp_responses), 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_mgrid,
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{ "Manager ID", "ecp.vdp.mgrid", FT_UINT8, BASE_HEX,
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NULL, 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_vsitypeid,
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{ "VSI type ID", "ecp.vdp.vsitypeid", FT_UINT24, BASE_HEX,
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NULL, 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_vsitypeidversion,
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{ "VSI type ID version", "ecp.vdp.vsitypeidversion", FT_UINT8, BASE_HEX,
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NULL, 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_instanceid,
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{ "VSI Instance ID version", "ecp.vdp.instanceid", FT_BYTES, BASE_NONE,
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NULL, 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_format,
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{ "VSI filter info format", "ecp.vdp.format", FT_UINT8, BASE_HEX,
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VALS(ecp_vdp_formats), 0x0, NULL, HFILL },
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},
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{ &hf_ecp_vdp_mac,
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{ "VSI Mac Address", "ecp.vdp.mac", FT_ETHER, BASE_NONE,
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NULL, 0x0, NULL, HFILL }
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},
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{ &hf_ecp_vdp_vlan,
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{ "VSI VLAN ID", "ecp.vdp.vlan", FT_UINT16, BASE_DEC,
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NULL, 0x0, NULL, HFILL }
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},
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};
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static gint *ett[] = {
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&ett_ecp,
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&ett_end_of_vdpdu,
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&ett_802_1qbg_capabilities_flags,
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};
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proto_ecp = proto_register_protocol("ECP Protocol", "ECP", "ecp");
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proto_register_field_array(proto_ecp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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ieee802a_add_oui(OUI_IEEE_802_1QBG, "ieee802a.ecp_pid",
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"IEEE802a ECP PID", &hf_reg, proto_ecp);
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ecp_handle = register_dissector("ecp", dissect_ecp, proto_ecp);
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}
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void proto_reg_handoff_ecp(void)
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{
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dissector_add_uint("ieee802a.ecp_pid", 0x0000, ecp_handle);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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