![Ulf Lamping](/assets/img/avatar_default.png)
I've done more than a day to change the timestamp resolution from microseconds to nanoseconds. As I really don't want to loose those changes, I'm going to check in the changes I've done so far. Hopefully someone else will give me a helping hand with the things left ... What's done: I've changed the timestamp resolution from usec to nsec in almost any place in the sources. I've changed parts of the implementation in nstime.s/.h and a lot of places elsewhere. As I don't understand the editcap source (well, I'm maybe just too tired right now), hopefully someone else might be able to fix this soon. Doing all those changes, we get native nanosecond timestamp resolution in Ethereal. After fixing all the remaining issues, I'll take a look how to display this in a convenient way... As I've also changed the wiretap timestamp resolution from usec to nsec we might want to change the wiretap version number... svn path=/trunk/; revision=15520
517 lines
16 KiB
C
517 lines
16 KiB
C
/* packet-aoe.c
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* Routines for dissecting the ATA over Ethernet protocol.
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* Ronnie Sahlberg 2004
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*
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* $Id$
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/conversation.h>
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#include <etypes.h>
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static int proto_aoe;
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static int hf_aoe_version=-1;
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static int hf_aoe_flags_response=-1;
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static int hf_aoe_flags_error=-1;
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static int hf_aoe_error=-1;
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static int hf_aoe_major=-1;
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static int hf_aoe_minor=-1;
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static int hf_aoe_cmd=-1;
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static int hf_aoe_tag=-1;
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static int hf_aoe_aflags_e=-1;
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static int hf_aoe_aflags_d=-1;
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static int hf_aoe_aflags_a=-1;
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static int hf_aoe_aflags_w=-1;
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static int hf_aoe_err_feature=-1;
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static int hf_aoe_sector_count=-1;
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static int hf_aoe_acmd=-1;
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static int hf_aoe_astatus=-1;
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static int hf_aoe_lba=-1;
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static int hf_aoe_response_in=-1;
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static int hf_aoe_response_to=-1;
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static int hf_aoe_time=-1;
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static gint ett_aoe = -1;
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static gint ett_aoe_flags = -1;
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#define AOE_FLAGS_RESPONSE 0x08
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#define AOE_FLAGS_ERROR 0x04
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#define AOE_AFLAGS_E 0x40
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#define AOE_AFLAGS_D 0x10
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#define AOE_AFLAGS_A 0x02
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#define AOE_AFLAGS_W 0x01
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static const true_false_string tfs_aflags_e = {
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"LBA48 extended command",
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"Normal command"
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};
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static const true_false_string tfs_aflags_d = {
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"?",
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"?"
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};
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static const true_false_string tfs_aflags_a = {
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"ASYNCHRONOUS Write",
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"synchronous write"
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};
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static const true_false_string tfs_aflags_w = {
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"WRITE to the device",
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"No write to device"
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};
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static const true_false_string tfs_response = {
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"Response",
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"Request"
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};
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static const true_false_string tfs_error = {
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"Error",
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"No error"
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};
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static const value_string error_vals[] = {
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{ 1, "Unrecognized command code" },
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{ 2, "Bad argument parameter" },
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{ 3, "Device unavailable" },
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{ 4, "Config string present" },
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{ 5, "Unsupported version" },
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{ 0, NULL}
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};
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#define AOE_CMD_ISSUE_ATA_COMMAND 0
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#define AOE_CMD_QUERY_CONFIG_INFO 1
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static const value_string cmd_vals[] = {
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{ AOE_CMD_ISSUE_ATA_COMMAND, "Issue ATA Command" },
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{ AOE_CMD_QUERY_CONFIG_INFO, "Query Config Information" },
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{ 0, NULL}
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};
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static const value_string ata_cmd_vals[] = {
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{ 0x00, "NOP" },
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{ 0x08, "Atapi soft reset" },
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{ 0x10, "Recalibrate" },
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{ 0x20, "Read sectors (with retry)" },
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{ 0x21, "Read sectors (no retry)" },
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{ 0x22, "Read long (with retry)" },
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{ 0x23, "Read long (no retry)" },
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{ 0x24, "Read ext" },
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{ 0x30, "Write sectors (with retry)" },
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{ 0x31, "Write sectors (no retry)" },
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{ 0x32, "Write long (with retry)" },
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{ 0x33, "Write long (no retry)" },
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{ 0x34, "Write ext" },
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{ 0x3c, "Write verify" },
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{ 0x40, "Read verify sectors (with retry)" },
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{ 0x41, "Read verify sectors (no retry)" },
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{ 0x50, "Format track" },
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{ 0x70, "Seek" },
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{ 0x90, "Execute device diagnostics" },
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{ 0x91, "Initialize device parameters" },
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{ 0x92, "Download microcode" },
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{ 0x94, "Standy immediate" },
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{ 0x95, "Idle immediate" },
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{ 0x96, "Standby" },
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{ 0x97, "Idle" },
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{ 0x98, "Check power mode" },
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{ 0x99, "Sleep" },
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{ 0xa0, "Atapi packet" },
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{ 0xa1, "Atapi identify device" },
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{ 0xa2, "Atapi service" },
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{ 0xb0, "Smart" },
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{ 0xc4, "Read multiple" },
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{ 0xc5, "Write multiple" },
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{ 0xc6, "Set multiple mode" },
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{ 0xc8, "Read dma (with retry)" },
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{ 0xc9, "Read dma (no retry)" },
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{ 0xca, "Write dma (with retry)" },
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{ 0xcb, "Write dma (no retru)" },
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{ 0xde, "Door lock" },
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{ 0xdf, "Door unlock" },
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{ 0xe0, "Standy immediate" },
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{ 0xe1, "Idle immediate" },
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{ 0xe2, "Standby" },
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{ 0xe3, "Idle" },
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{ 0xe4, "Read buffer" },
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{ 0xe5, "Check power mode" },
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{ 0xe6, "Sleep" },
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{ 0xe8, "Write buffer" },
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{ 0xec, "Identify Device" },
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{ 0xed, "Media eject" },
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{ 0xee, "Identify device dma" },
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{ 0xef, "Set features" },
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{ 0xf1, "Security set password" },
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{ 0xf2, "Security unlock" },
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{ 0xf3, "Security erase prepare" },
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{ 0xf4, "Security erase unit" },
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{ 0xf5, "Security freeze" },
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{ 0xf6, "Security disable password" },
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{ 0, NULL}
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};
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typedef struct ata_info_t {
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guint32 tag;
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void *conversation; /* just used to multiplex different conversations */
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guint32 request_frame;
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guint32 response_frame;
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nstime_t req_time;
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guint8 cmd;
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} ata_info_t;
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static GHashTable *ata_cmd_unmatched;
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static GHashTable *ata_cmd_matched;
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static guint
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ata_cmd_hash_matched(gconstpointer k)
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{
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return GPOINTER_TO_UINT(k);
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}
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static gint
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ata_cmd_equal_matched(gconstpointer k1, gconstpointer k2)
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{
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return k1==k2;
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}
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static guint
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ata_cmd_hash_unmatched(gconstpointer k)
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{
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const ata_info_t *key = k;
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return key->tag;
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}
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static gint
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ata_cmd_equal_unmatched(gconstpointer k1, gconstpointer k2)
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{
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const ata_info_t *key1 = k1;
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const ata_info_t *key2 = k2;
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return (key1->tag==key2->tag)&&(key1->conversation==key2->conversation);
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}
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static void
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dissect_ata_pdu(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gboolean response, guint32 tag)
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{
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proto_item *tmp_item;
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guint8 aflags;
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guint64 lba;
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ata_info_t *ata_info=NULL;
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conversation_t *conversation;
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/* only create a conversation for ATA commands */
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conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
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pinfo->ptype, pinfo->srcport,
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pinfo->destport, 0);
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if (conversation == NULL) {
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/* We don't yet have a conversation, so create one. */
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conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
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pinfo->ptype, pinfo->srcport,
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pinfo->destport, 0);
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}
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if( !(pinfo->fd->flags.visited) ){
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if(!response){
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ata_info_t *tmp_ata_info;
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/* first time we see this request so add a struct for request/response
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matching */
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ata_info=se_alloc(sizeof(ata_info_t));
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ata_info->tag=tag;
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ata_info->conversation=conversation;
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ata_info->request_frame=pinfo->fd->num;
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ata_info->response_frame=0;
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ata_info->cmd=tvb_get_guint8(tvb, offset+3);
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ata_info->req_time=pinfo->fd->abs_ts;
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tmp_ata_info=g_hash_table_lookup(ata_cmd_unmatched, ata_info);
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if(tmp_ata_info){
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g_hash_table_remove(ata_cmd_unmatched, tmp_ata_info);
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}
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g_hash_table_insert(ata_cmd_unmatched, ata_info, ata_info);
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} else {
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ata_info_t tmp_ata_info;
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/* first time we see this response so see if we can match it with
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a request */
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tmp_ata_info.tag=tag;
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tmp_ata_info.conversation=conversation;
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ata_info=g_hash_table_lookup(ata_cmd_unmatched, &tmp_ata_info);
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/* woo hoo we could, so no need to store this in unmatched any more,
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move both request and response to the matched table */
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if(ata_info){
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ata_info->response_frame=pinfo->fd->num;
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g_hash_table_remove(ata_cmd_unmatched, ata_info);
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g_hash_table_insert(ata_cmd_matched, GUINT_TO_POINTER(ata_info->request_frame), ata_info);
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g_hash_table_insert(ata_cmd_matched, GUINT_TO_POINTER(ata_info->response_frame), ata_info);
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}
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}
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} else {
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ata_info=g_hash_table_lookup(ata_cmd_matched, GUINT_TO_POINTER(pinfo->fd->num));
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}
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if(ata_info){
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if(response){
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if(ata_info->request_frame){
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nstime_t delta_ts;
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tmp_item=proto_tree_add_uint(tree, hf_aoe_response_to, tvb, 0, 0, ata_info->request_frame);
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PROTO_ITEM_SET_GENERATED(tmp_item);
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nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &ata_info->req_time);
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tmp_item=proto_tree_add_time(tree, hf_aoe_time, tvb, offset, 0, &delta_ts);
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PROTO_ITEM_SET_GENERATED(tmp_item);
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}
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} else {
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if(ata_info->response_frame){
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tmp_item=proto_tree_add_uint(tree, hf_aoe_response_in, tvb, 0, 0, ata_info->response_frame);
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PROTO_ITEM_SET_GENERATED(tmp_item);
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}
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}
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}
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/* aflags */
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aflags=tvb_get_guint8(tvb, offset);
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proto_tree_add_item(tree, hf_aoe_aflags_e, tvb, offset, 1, FALSE);
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if(aflags&AOE_AFLAGS_E){
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proto_tree_add_item(tree, hf_aoe_aflags_d, tvb, offset, 1, FALSE);
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}
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if(aflags&AOE_AFLAGS_W){
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proto_tree_add_item(tree, hf_aoe_aflags_a, tvb, offset, 1, FALSE);
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}
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proto_tree_add_item(tree, hf_aoe_aflags_w, tvb, offset, 1, FALSE);
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offset++;
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/* err/feature */
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proto_tree_add_item(tree, hf_aoe_err_feature, tvb, offset, 1, FALSE);
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offset++;
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/* sector count */
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proto_tree_add_item(tree, hf_aoe_sector_count, tvb, offset, 1, FALSE);
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offset++;
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/* ata command/status */
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if(!response){
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proto_tree_add_item(tree, hf_aoe_acmd, tvb, offset, 1, FALSE);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, " ATA:%s", val_to_str(tvb_get_guint8(tvb, offset), ata_cmd_vals, " Unknown ATA<0x%02x>"));
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}
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} else {
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proto_tree_add_item(tree, hf_aoe_astatus, tvb, offset, 1, FALSE);
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if(ata_info && ata_info->request_frame){
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/* we dont know what command it was unless we saw the request_frame */
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tmp_item=proto_tree_add_uint(tree, hf_aoe_acmd, tvb, 0, 0, ata_info->cmd);
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PROTO_ITEM_SET_GENERATED(tmp_item);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, " ATA:%s", val_to_str(ata_info->cmd, ata_cmd_vals, " Unknown ATA<0x%02x>"));
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}
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}
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}
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offset++;
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/*lba probably complete wrong */
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lba=tvb_get_letohs(tvb, offset+4);
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lba=(lba<<32)|tvb_get_letohl(tvb, offset);
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offset+=8;
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proto_tree_add_uint64(tree, hf_aoe_lba, tvb, offset-8, 6, lba);
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}
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static void
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dissect_aoe_v1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint8 flags, cmd;
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guint32 tag;
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proto_item *flags_item=NULL;
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proto_tree *flags_tree=NULL;
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/* read and dissect the flags */
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flags=tvb_get_guint8(tvb, 0)&0x0f;
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if(tree){
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flags_item=proto_tree_add_text(tree, tvb, 0, 1, "Flags:");
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flags_tree=proto_item_add_subtree(flags_item, ett_aoe_flags);
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}
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proto_tree_add_item(flags_tree, hf_aoe_flags_response, tvb, 0, 1, FALSE);
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proto_tree_add_item(flags_tree, hf_aoe_flags_error, tvb, 0, 1, FALSE);
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if(flags_item){
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proto_item_append_text(flags_item,(flags&AOE_FLAGS_RESPONSE)?" Response":" Request");
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if(flags&AOE_FLAGS_ERROR){
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proto_item_append_text(flags_item, " Error");
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}
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}
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/* error */
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if(flags&AOE_FLAGS_ERROR){
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proto_tree_add_item(tree, hf_aoe_error, tvb, 1, 1, FALSE);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, "Error:%s ", val_to_str(tvb_get_guint8(tvb, 1), error_vals, "Unknown error<%d>"));
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}
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}
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/* major/minor address */
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proto_tree_add_item(tree, hf_aoe_major, tvb, 2, 2, FALSE);
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proto_tree_add_item(tree, hf_aoe_minor, tvb, 4, 1, FALSE);
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/* command */
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cmd=tvb_get_guint8(tvb, 5);
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proto_tree_add_item(tree, hf_aoe_cmd, tvb, 5, 1, FALSE);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, "%s %s", val_to_str(cmd, cmd_vals, "Unknown command<%d>"), (flags&AOE_FLAGS_RESPONSE)?"Response":"Request");
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}
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/* tag */
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tag=tvb_get_letohl(tvb, 6);
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proto_tree_add_item(tree, hf_aoe_tag, tvb, 6, 4, FALSE);
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switch(cmd){
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case AOE_CMD_ISSUE_ATA_COMMAND:
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dissect_ata_pdu(pinfo, tree, tvb, 10, flags&AOE_FLAGS_RESPONSE, tag);
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break;
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case AOE_CMD_QUERY_CONFIG_INFO:
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break;
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}
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}
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static void
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dissect_aoe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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guint8 version;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "AoE");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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if (parent_tree) {
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item = proto_tree_add_item(parent_tree, proto_aoe, tvb, 0, -1, FALSE);
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tree = proto_item_add_subtree(item, ett_aoe);
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}
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version=tvb_get_guint8(tvb, 0)>>4;
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proto_tree_add_uint(tree, hf_aoe_version, tvb, 0, 1, version);
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switch(version){
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case 1:
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dissect_aoe_v1(tvb, pinfo, tree);
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break;
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}
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}
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static void
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ata_init(void)
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{
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if(ata_cmd_unmatched){
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g_hash_table_destroy(ata_cmd_unmatched);
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ata_cmd_unmatched=NULL;
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}
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ata_cmd_unmatched=g_hash_table_new(ata_cmd_hash_unmatched, ata_cmd_equal_unmatched);
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if(ata_cmd_matched){
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g_hash_table_destroy(ata_cmd_matched);
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ata_cmd_matched=NULL;
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}
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ata_cmd_matched=g_hash_table_new(ata_cmd_hash_matched, ata_cmd_equal_matched);
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}
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void
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proto_register_aoe(void)
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{
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static hf_register_info hf[] = {
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{ &hf_aoe_cmd,
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{ "Command", "aoe.cmd", FT_UINT8, BASE_DEC, VALS(cmd_vals), 0x0,
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"AOE Command", HFILL}},
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{ &hf_aoe_version,
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{ "Version", "aoe.version", FT_UINT8, BASE_DEC, NULL, 0x0,
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"Version of the AOE protocol", HFILL}},
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{ &hf_aoe_error,
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{ "Error", "aoe.error", FT_UINT8, BASE_DEC, VALS(error_vals), 0x0,
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"Error code", HFILL}},
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{ &hf_aoe_err_feature,
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{ "Err/Feature", "aoe.err_feature", FT_UINT8, BASE_HEX, NULL, 0x0,
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"Err/Feature", HFILL}},
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{ &hf_aoe_sector_count,
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{ "Sector Count", "aoe.sector_count", FT_UINT8, BASE_DEC, NULL, 0x0,
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"Sector Count", HFILL}},
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{ &hf_aoe_flags_response,
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{ "Response flag", "aoe.response", FT_BOOLEAN, 8, TFS(&tfs_response), AOE_FLAGS_RESPONSE, "Whether this is a response PDU or not", HFILL}},
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{ &hf_aoe_flags_error,
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{ "Error flag", "aoe.error", FT_BOOLEAN, 8, TFS(&tfs_error), AOE_FLAGS_ERROR, "Whether this is an error PDU or not", HFILL}},
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{ &hf_aoe_major,
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{ "Major", "aoe.major", FT_UINT16, BASE_HEX, NULL, 0x0,
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"Major address", HFILL}},
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{ &hf_aoe_minor,
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{ "Minor", "aoe.minor", FT_UINT8, BASE_HEX, NULL, 0x0,
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"Minor address", HFILL}},
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{ &hf_aoe_acmd,
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{ "ATA Cmd", "aoe.ata.cmd", FT_UINT8, BASE_HEX, VALS(ata_cmd_vals), 0x0,
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"ATA command opcode", HFILL}},
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{ &hf_aoe_astatus,
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{ "ATA Status", "aoe.ata.status", FT_UINT8, BASE_HEX, NULL, 0x0,
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"ATA status bits", HFILL}},
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{ &hf_aoe_tag,
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{ "Tag", "aoe.tag", FT_UINT32, BASE_HEX, NULL, 0x0,
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"Command Tag", HFILL}},
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{ &hf_aoe_aflags_e,
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{ "E", "aoe.aflags.e", FT_BOOLEAN, 8, TFS(&tfs_aflags_e), AOE_AFLAGS_E, "Whether this is a normal or LBA48 command", HFILL}},
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{ &hf_aoe_aflags_d,
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{ "D", "aoe.aflags.d", FT_BOOLEAN, 8, TFS(&tfs_aflags_d), AOE_AFLAGS_D, "", HFILL}},
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{ &hf_aoe_aflags_a,
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{ "A", "aoe.aflags.a", FT_BOOLEAN, 8, TFS(&tfs_aflags_a), AOE_AFLAGS_A, "Whether this is an asynchronous write or not", HFILL}},
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{ &hf_aoe_aflags_w,
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{ "W", "aoe.aflags.w", FT_BOOLEAN, 8, TFS(&tfs_aflags_w), AOE_AFLAGS_W, "Is this a command writing data to the device or not", HFILL}},
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{ &hf_aoe_lba,
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{ "Lba", "aoe.lba", FT_UINT64, BASE_HEX, NULL, 0x00, "Lba address", HFILL}},
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{ &hf_aoe_response_in,
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{ "Response In", "aoe.response_in", FT_FRAMENUM, BASE_DEC, NULL, 0x0, "The response to this packet is in this frame", HFILL }},
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{ &hf_aoe_response_to,
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{ "Response To", "aoe.response_to", FT_FRAMENUM, BASE_DEC, NULL, 0x0, "This is a response to the ATA command in this frame", HFILL }},
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{ &hf_aoe_time,
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{ "Time from request", "aoe.time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, "Time between Request and Reply for ATA calls", HFILL }},
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};
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static gint *ett[] = {
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&ett_aoe,
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&ett_aoe_flags,
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};
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proto_aoe = proto_register_protocol("ATAoverEthernet", "AOE", "aoe");
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proto_register_field_array(proto_aoe, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("aoe", dissect_aoe, proto_aoe);
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register_init_routine(ata_init);
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}
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void
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proto_reg_handoff_aoe(void)
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{
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dissector_handle_t aoe_handle;
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aoe_handle = find_dissector("aoe");
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dissector_add("ethertype", ETHERTYPE_AOE, aoe_handle);
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}
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