3f0fc1b232
Two interlocking problems cause the dissection of FC to fail in some cases, as shown in the capture of the related issue. The FC dissector assumes that ETHERTYPE_UNK in the data structure passed to it is coming from the MDS header dissector only, and thus that header sizes have to be taken into account. This is not / no longer the case. It always passes down ETHERTYPE_FCFT. Therefore the MDS header size checking does not apply to ETHERTYP_UNK, so is removed as condition. The other FC related dissectors were forced to setup a data structure to pass to FC for it to handle that part of the frame. Because these weren't related to ethernet, these lazily set the ethertype field in the data structure to 0. This unfortunately matches ETHERTYPE_UNK, triggering the MDS header size checking in FC, leading to this issue. With the first problem resolved, now make it explicit that unknown ethertype is indicated by ETHERTYPE_UNK, not '0'. Addresses primary part of issue #17084
159 lines
5 KiB
C
159 lines
5 KiB
C
/* packet-fc.h
|
|
* Basic Fibre Channel Header definitions
|
|
* Copyright 2002 Dinesh G Dutt (ddutt@cisco.com)
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#ifndef __PACKET_FC_H_
|
|
#define __PACKET_FC_H_
|
|
|
|
#include <epan/conversation.h>
|
|
#include <epan/etypes.h>
|
|
#include "ws_symbol_export.h"
|
|
|
|
/* R_CTL upper bits creates a classification tree */
|
|
#define FC_RCTL_DEV_DATA 0x00
|
|
#define FC_RCTL_ELS 0x20
|
|
#define FC_RCTL_LINK_DATA 0x30
|
|
#define FC_RCTL_VIDEO 0x40
|
|
#define FC_RCTL_BLS 0x80
|
|
#define FC_RCTL_LINK_CTL 0xC0
|
|
/* XXX - is 0xF0 Extended Routing? It is in the FC-FS draft on the T11
|
|
Web site. */
|
|
|
|
#define FC_TYPE_CMNSVC 0x0 /* Used in PRLI Svc Param Page */
|
|
|
|
/* TYPE definitions for Basic or Extended Link_Data */
|
|
#define FC_TYPE_BLS 0x0
|
|
#define FC_TYPE_ELS 0x1
|
|
|
|
/* TYPE definitions for FC-4 */
|
|
#define FC_TYPE_LLCSNAP 0x4
|
|
#define FC_TYPE_IP 0x5
|
|
#define FC_TYPE_SCSI 0x8
|
|
#define FC_TYPE_SB_TO_CU 0x1B
|
|
#define FC_TYPE_SB_FROM_CU 0x1C
|
|
#define FC_TYPE_FCCT 0x20
|
|
#define FC_TYPE_SWILS 0x22
|
|
#define FC_TYPE_AL 0x23
|
|
#define FC_TYPE_SNMP 0x24
|
|
#define FC_TYPE_VENDOR 0xFF
|
|
|
|
|
|
/*
|
|
* the following allows TAP code access to the messages
|
|
* without having to duplicate it. With MSVC and a
|
|
* libwireshark.dll, we need a special declaration.
|
|
*/
|
|
WS_DLL_PUBLIC const value_string fc_fc4_val[];
|
|
|
|
/* DF_CTL bits */
|
|
#define FC_DFCTL_DH 0x03 /* Device_Header type bits: */
|
|
#define FC_DFCTL_DH_NONE 0x00 /* No Device_Header */
|
|
#define FC_DFCTL_DH_16_BYTE 0x01 /* 16 Byte Device_Header */
|
|
#define FC_DFCTL_DH_32_BYTE 0x02 /* 32 Byte Device_Header */
|
|
#define FC_DFCTL_DH_64_BYTE 0x03 /* 64 Byte Device_Header */
|
|
#define FC_DFCTL_AH 0x10 /* Association_Header bit */
|
|
#define FC_DFCTL_NH 0x20 /* Association_Header bit */
|
|
#define FC_DFCTL_SH 0x40 /* reserved for security header */
|
|
|
|
/* Derived Frame types (used for ULP demux) */
|
|
#define FC_FTYPE_UNDEF 0x0
|
|
#define FC_FTYPE_SWILS 0x1
|
|
#define FC_FTYPE_IP 0x2
|
|
#define FC_FTYPE_SCSI 0x3
|
|
#define FC_FTYPE_BLS 0x4
|
|
#define FC_FTYPE_ELS 0x5
|
|
#define FC_FTYPE_FCCT 0x7
|
|
#define FC_FTYPE_LINKDATA 0x8
|
|
#define FC_FTYPE_VDO 0x9
|
|
#define FC_FTYPE_LINKCTL 0xA
|
|
#define FC_FTYPE_SWILS_RSP 0xB
|
|
#define FC_FTYPE_SBCCS 0xC
|
|
#define FC_FTYPE_OHMS 0xD
|
|
|
|
/* Well-known Address Definitions (in Network order) */
|
|
#define FC_WKA_MULTICAST 0xFFFFF5
|
|
#define FC_WKA_CLKSYNC 0xFFFFF6
|
|
#define FC_WKA_KEYDIST 0xFFFFF7
|
|
#define FC_WKA_ALIAS 0xFFFFF8
|
|
#define FC_WKA_QOSF 0xFFFFF9
|
|
#define FC_WKA_MGMT 0xFFFFFA
|
|
#define FC_WKA_TIME 0xFFFFFB
|
|
#define FC_WKA_DNS 0xFFFFFC
|
|
#define FC_WKA_FABRIC_CTRLR 0xFFFFFD
|
|
#define FC_WKA_FPORT 0xFFFFFE
|
|
#define FC_WKA_BCAST 0xFFFFFF
|
|
|
|
/* Well-known Address Definitions (in little endian) */
|
|
|
|
/* Information Categories for Link Data & Link Control Frames */
|
|
#define FC_IU_UNCATEGORIZED 0x0
|
|
#define FC_IU_SOLICITED_DATA 0x1
|
|
#define FC_IU_UNSOLICITED_CTL 0x2
|
|
#define FC_IU_SOLICITED_CTL 0x3
|
|
#define FC_IU_UNSOLICITED_DATA 0x4
|
|
#define FC_IU_DATA_DESCRIPTOR 0x5
|
|
#define FC_IU_UNSOLICITED_CMD 0x6
|
|
#define FC_IU_CMD_STATUS 0x7
|
|
|
|
/* FC_CTL bits */
|
|
#define FC_FCTL_EXCHANGE_RESPONDER 0x800000
|
|
#define FC_FCTL_SEQ_RECIPIENT 0x400000
|
|
#define FC_FCTL_EXCHANGE_FIRST 0x200000
|
|
#define FC_FCTL_EXCHANGE_LAST 0x100000
|
|
#define FC_FCTL_SEQ_LAST 0x080000
|
|
#define FC_FCTL_PRIORITY 0x020000
|
|
#define FC_FCTL_TRANSFER_SEQ_INITIATIVE 0x010000
|
|
#define FC_FCTL_LAST_DATA_FRAME_MASK 0x00c000
|
|
#define FC_FCTL_ACK_0_1_MASK 0x003000
|
|
#define FC_FCTL_REXMITTED_SEQ 0x000200
|
|
#define FC_FCTL_ABTS_MASK 0x000030
|
|
#define FC_FCTL_REL_OFFSET 0x000008
|
|
|
|
|
|
typedef struct _fc_exchange_t {
|
|
guint32 first_exchange_frame;
|
|
guint32 last_exchange_frame;
|
|
nstime_t fc_time;
|
|
} fc_exchange_t;
|
|
|
|
/* FC header structure */
|
|
typedef struct _fc_hdr {
|
|
address s_id;
|
|
address d_id;
|
|
guint32 fctl;
|
|
guint8 type;
|
|
guint16 seqcnt;
|
|
guint16 oxid;
|
|
guint16 rxid;
|
|
guint8 r_ctl;
|
|
guint8 cs_ctl;
|
|
guint16 lun;
|
|
fc_exchange_t* fc_ex;
|
|
guint32 relative_offset;
|
|
} fc_hdr;
|
|
|
|
#define FC_DATA_SOF_FIRST_FRAME 0x1
|
|
#define FC_DATA_SOF_SOFF 0x2
|
|
#define FC_DATA_EOF_LAST_FRAME 0x80
|
|
#define FC_DATA_EOF_INVALID 0x40
|
|
|
|
/* Data structure to pass into FC dissector */
|
|
typedef struct _fc_data {
|
|
guint ethertype;
|
|
guint8 sof_eof; /**< FC's SOF/EOF encoding passed to FC decoder
|
|
* Bit 7 set if Last frame in sequence
|
|
* Bit 6 set if invalid frame content
|
|
* Bit 2 set if SOFf
|
|
* Bit 1 set if first frame in sequence
|
|
*/
|
|
} fc_data_t;
|
|
|
|
#endif /* __PACKET_FC_H_ */
|