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wireshark/epan/dissectors/packet-ncp.c

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/* packet-ncp.c
* Routines for NetWare Core Protocol
* Gilbert Ramirez <gram@alumni.rice.edu>
* Modified to allow NCP over TCP/IP decodes by James Coe <jammer@cin.net>
* Modified to decode server op-lock, packet signature,
* & NDS packets by Greg Morris <gmorris@novell.com>
*
* Portions Copyright (c) by Gilbert Ramirez 2000-2002
* Portions Copyright (c) by James Coe 2000-2002
* Portions Copyright (c) Novell, Inc. 2000-2003
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 2000 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* XXX:
ToDo: Find and fix possible memory leak(s):
Example:
A 40M capture file with mostly NCP frames results
in a 400K-800K memory usage increase each time the file is reloaded.
(If the NCP dissection is disabled, there is minimal memory usage
increase each time the file is reloaded).
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/srt_table.h>
#include "packet-ipx.h"
#include "packet-tcp.h"
#include "packet-ncp-int.h"
#include <epan/conversation_table.h>
void proto_register_ncp(void);
void proto_reg_handoff_ncp(void);
int proto_ncp = -1;
static int hf_ncp_ip_ver = -1;
static int hf_ncp_ip_length = -1;
static int hf_ncp_ip_rplybufsize = -1;
static int hf_ncp_ip_sig = -1;
static int hf_ncp_ip_packetsig = -1;
static int hf_ncp_type = -1;
static int hf_ncp_seq = -1;
static int hf_ncp_connection = -1;
static int hf_ncp_task = -1;
static int hf_ncp_stream_type = -1;
static int hf_ncp_system_flags = -1;
static int hf_ncp_system_flags_abt = -1;
static int hf_ncp_system_flags_eob = -1;
static int hf_ncp_system_flags_sys = -1;
static int hf_ncp_system_flags_bsy = -1;
static int hf_ncp_system_flags_lst = -1;
static int hf_ncp_src_connection = -1;
static int hf_ncp_dst_connection = -1;
static int hf_ncp_packet_seqno = -1;
static int hf_ncp_delay_time = -1;
static int hf_ncp_burst_seqno = -1;
static int hf_ncp_ack_seqno = -1;
static int hf_ncp_burst_len = -1;
static int hf_ncp_burst_offset = -1;
static int hf_ncp_data_offset = -1;
static int hf_ncp_data_bytes = -1;
static int hf_ncp_missing_fraglist_count = -1;
static int hf_ncp_missing_data_offset = -1;
static int hf_ncp_missing_data_count = -1;
static int hf_ncp_oplock_flag = -1;
static int hf_ncp_oplock_handle = -1;
static int hf_ncp_completion_code = -1;
static int hf_ncp_connection_status = -1;
static int hf_ncp_slot = -1;
static int hf_ncp_control_code = -1;
/* static int hf_ncp_fragment_handle = -1; */
static int hf_lip_echo = -1;
static int hf_ncp_burst_command = -1;
static int hf_ncp_burst_file_handle = -1;
static int hf_ncp_burst_reserved = -1;
gint ett_ncp = -1;
gint ett_nds = -1;
gint ett_nds_segments = -1;
gint ett_nds_segment = -1;
static gint ett_ncp_system_flags = -1;
static expert_field ei_ncp_oplock_handle = EI_INIT;
static expert_field ei_ncp_new_server_session = EI_INIT;
static expert_field ei_ncp_type = EI_INIT;
static struct novell_tap ncp_tap;
static struct ncp_common_header header;
static struct ncp_common_header *ncp_hdr;
dissector_handle_t nds_data_handle;
/* desegmentation of NCP over TCP */
static gboolean ncp_desegment = TRUE;
static dissector_handle_t data_handle;
#define TCP_PORT_NCP 524
#define UDP_PORT_NCP 524
#define NCP_RQST_HDR_LENGTH 7
#define NCP_RPLY_HDR_LENGTH 8
/* These are the header structures to handle NCP over IP */
#define NCPIP_RQST 0x446d6454 /* "DmdT" */
#define NCPIP_RPLY 0x744e6350 /* "tNcP" */
struct ncp_ip_header {
guint32 signature;
guint32 length;
};
/* This header only appears on NCP over IP request packets */
struct ncp_ip_rqhdr {
guint32 version;
guint32 rplybufsize;
};
static const value_string ncp_ip_signature[] = {
{ NCPIP_RQST, "Demand Transport (Request)" },
{ NCPIP_RPLY, "Transport is NCP (Reply)" },
{ 0, NULL }
};
static const value_string burst_command[] = {
{ 0x01000000, "Burst Read" },
{ 0x02000000, "Burst Write" },
{ 0, NULL }
};
/* The information in this module comes from:
NetWare LAN Analysis, Second Edition
Laura A. Chappell and Dan E. Hakes
(c) 1994 Novell, Inc.
Novell Press, San Jose.
ISBN: 0-7821-1362-1
And from the ncpfs source code by Volker Lendecke
And:
Programmer's Guide to the NetWare Core Protocol
Steve Conner & Diane Conner
(c) 1996 by Steve Conner & Diane Conner
Published by Annabooks, San Diego, California
ISBN: 0-929392-31-0
And:
http:developer.novell.com
NCP documentation
*/
static const value_string ncp_type_vals[] = {
{ NCP_ALLOCATE_SLOT, "Create a service connection" },
{ NCP_SERVICE_REQUEST, "Service request" },
{ NCP_SERVICE_REPLY, "Service reply" },
{ NCP_WATCHDOG, "Watchdog" },
{ NCP_DEALLOCATE_SLOT, "Destroy service connection" },
{ NCP_BROADCAST_SLOT, "Server Broadcast" },
{ NCP_BURST_MODE_XFER, "Burst mode transfer" },
{ NCP_POSITIVE_ACK, "Request being processed" },
{ NCP_LIP_ECHO, "Large Internet Packet Echo" },
{ 0, NULL }
};
static const value_string ncp_oplock_vals[] = {
{ 0x21, "Message Waiting" },
{ 0x24, "Clear Op-lock" },
{ 0, NULL }
};
enum ncp_table_values
{
NCP_NCP_SRT_TABLE_INDEX = 0,
NCP_NDS_SRT_TABLE_INDEX,
NCP_FUNC_SRT_TABLE_INDEX,
NCP_SSS_SRT_TABLE_INDEX,
NCP_NMAS_SRT_TABLE_INDEX,
NCP_SUB17_SRT_TABLE_INDEX,
NCP_SUB21_SRT_TABLE_INDEX,
NCP_SUB22_SRT_TABLE_INDEX,
NCP_SUB23_SRT_TABLE_INDEX,
NCP_SUB32_SRT_TABLE_INDEX,
NCP_SUB34_SRT_TABLE_INDEX,
NCP_SUB35_SRT_TABLE_INDEX,
NCP_SUB36_SRT_TABLE_INDEX,
NCP_SUB86_SRT_TABLE_INDEX,
NCP_SUB87_SRT_TABLE_INDEX,
NCP_SUB89_SRT_TABLE_INDEX,
NCP_SUB90_SRT_TABLE_INDEX,
NCP_SUB92_SRT_TABLE_INDEX,
NCP_SUB94_SRT_TABLE_INDEX,
NCP_SUB104_SRT_TABLE_INDEX,
NCP_SUB111_SRT_TABLE_INDEX,
NCP_SUB114_SRT_TABLE_INDEX,
NCP_SUB123_SRT_TABLE_INDEX,
NCP_SUB131_SRT_TABLE_INDEX
};
#define NCP_NUM_PROCEDURES 0
static void
ncpstat_init(struct register_srt* srt _U_, GArray* srt_array, srt_gui_init_cb gui_callback, void* gui_data)
{
/* Initialize all of the SRT tables with 0 rows. That way we can "filter" the drawing
function to only output tables with rows > 0 */
init_srt_table("NCP", "Groups", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.group", gui_callback, gui_data, NULL);
/* NDS Verbs */
init_srt_table("NDS Verbs", "NDS", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.ndsverb", gui_callback, gui_data, NULL);
/* NCP Functions */
init_srt_table("NCP Functions without Subfunctions", "Functions", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func", gui_callback, gui_data, NULL);
/* Secret Store Verbs */
init_srt_table("Secret Store Verbs", "SSS", srt_array, NCP_NUM_PROCEDURES, NULL, "sss.subverb", gui_callback, gui_data, NULL);
/* NMAS Verbs */
init_srt_table("NMAS Verbs", "NMAS", srt_array, NCP_NUM_PROCEDURES, NULL, "nmas.subverb", gui_callback, gui_data, NULL);
/* NCP Subfunctions */
init_srt_table("Subfunctions for NCP 17", "17", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==17 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 21", "21", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==21 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 22", "22", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==22 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 23", "23", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==23 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 32", "32", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==32 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 34", "34", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==34 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 35", "35", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==35 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 36", "36", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==36 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 86", "86", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==86 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 87", "87", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==87 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 89 (Extended NCP's with UTF8 Support)", "89", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==89 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 90", "90", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==90 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 92 (Secret Store Services)", "92", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==92 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 94 (Novell Modular Authentication Services)", "94", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==94 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 104", "104", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==104 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 111", "111", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==111 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 114", "114", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==114 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 123", "123", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==123 && ncp.subfunc", gui_callback, gui_data, NULL);
init_srt_table("Subfunctions for NCP 131", "131", srt_array, NCP_NUM_PROCEDURES, NULL, "ncp.func==131 && ncp.subfunc", gui_callback, gui_data, NULL);
}
static int
ncpstat_packet(void *pss, packet_info *pinfo, epan_dissect_t *edt _U_, const void *prv)
{
guint i = 0;
srt_stat_table *ncp_srt_table;
srt_data_t *data = (srt_data_t *)pss;
const ncp_req_hash_value *request_val=(const ncp_req_hash_value *)prv;
gchar* tmp_str;
/* if we haven't seen the request, just ignore it */
if(!request_val || request_val->ncp_rec==0){
return 0;
}
/* By Group */
tmp_str = val_to_str_wmem(NULL, request_val->ncp_rec->group, ncp_group_vals, "Unknown(%u)");
i = NCP_NCP_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, request_val->ncp_rec->group, tmp_str);
wmem_free(NULL, tmp_str);
add_srt_table_data(ncp_srt_table, request_val->ncp_rec->group, &request_val->req_frame_time, pinfo);
/* By NCP number without subfunction*/
if (request_val->ncp_rec->subfunc==0) {
i = NCP_FUNC_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, request_val->ncp_rec->func, request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, request_val->ncp_rec->func, &request_val->req_frame_time, pinfo);
}
/* By Subfunction number */
if(request_val->ncp_rec->subfunc!=0){
if (request_val->ncp_rec->func==17) {
i = NCP_SUB17_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==21) {
i = NCP_SUB21_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==22) {
i = NCP_SUB22_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==23) {
i = NCP_SUB23_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==32) {
i = NCP_SUB32_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==34) {
i = NCP_SUB34_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==35) {
i = NCP_SUB35_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==36) {
i = NCP_SUB36_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==86) {
i = NCP_SUB86_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==87) {
i = NCP_SUB87_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==89) {
i = NCP_SUB89_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==90) {
i = NCP_SUB90_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==92) {
i = NCP_SUB92_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==94) {
i = NCP_SUB94_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==104) {
i = NCP_SUB104_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==111) {
i = NCP_SUB111_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==114) {
i = NCP_SUB114_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==123) {
i = NCP_SUB123_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
if (request_val->ncp_rec->func==131) {
i = NCP_SUB131_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->ncp_rec->subfunc), request_val->ncp_rec->name);
add_srt_table_data(ncp_srt_table, (request_val->ncp_rec->subfunc), &request_val->req_frame_time, pinfo);
}
}
/* By NDS verb */
if (request_val->ncp_rec->func==0x68) {
tmp_str = val_to_str_wmem(NULL, request_val->nds_request_verb, ncp_nds_verb_vals, "Unknown(%u)");
i = NCP_NDS_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->nds_request_verb), tmp_str);
add_srt_table_data(ncp_srt_table, (request_val->nds_request_verb), &request_val->req_frame_time, pinfo);
wmem_free(NULL, tmp_str);
}
if (request_val->ncp_rec->func==0x5c) {
tmp_str = val_to_str_wmem(NULL, request_val->req_nds_flags, sss_verb_enum, "Unknown(%u)");
i = NCP_SSS_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->req_nds_flags), tmp_str);
add_srt_table_data(ncp_srt_table, (request_val->req_nds_flags), &request_val->req_frame_time, pinfo);
wmem_free(NULL, tmp_str);
}
if (request_val->ncp_rec->func==0x5e) {
tmp_str = val_to_str_wmem(NULL, request_val->req_nds_flags, nmas_subverb_enum, "Unknown(%u)");
i = NCP_NMAS_SRT_TABLE_INDEX;
ncp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
init_srt_table_row(ncp_srt_table, (request_val->req_nds_flags), tmp_str);
add_srt_table_data(ncp_srt_table, (request_val->req_nds_flags), &request_val->req_frame_time, pinfo);
wmem_free(NULL, tmp_str);
}
return 1;
}
/* Conversation Struct so we can detect NCP server sessions */
typedef struct {
conversation_t *conversation;
guint32 nwconnection;
guint8 nwtask;
} mncp_rhash_key;
/* Store the packet number for the start of the NCP session.
* Note sessions are defined as
* NCP Connection + NCP Task == Unique NCP server session
* It is normal for multiple sessions per connection to exist
* These are normally different applications running on multi-tasking
* Operating Systems.
*/
typedef struct {
guint32 session_start_packet_num;
} mncp_rhash_value;
static GHashTable *mncp_rhash = NULL;
/* Hash Functions */
static gint
mncp_equal(gconstpointer v, gconstpointer v2)
{
const mncp_rhash_key *val1 = (const mncp_rhash_key*)v;
const mncp_rhash_key *val2 = (const mncp_rhash_key*)v2;
if (val1->conversation == val2->conversation && val1->nwconnection == val2->nwconnection && val1->nwtask == val2->nwtask) {
return 1;
}
return 0;
}
static guint
mncp_hash(gconstpointer v)
{
const mncp_rhash_key *mncp_key = (const mncp_rhash_key*)v;
return GPOINTER_TO_UINT(mncp_key->conversation)+mncp_key->nwconnection+mncp_key->nwtask;
}
/* Initializes the hash table each time a new
* file is loaded or re-loaded in wireshark */
static void
mncp_init_protocol(void)
{
mncp_rhash = g_hash_table_new(mncp_hash, mncp_equal);
}
static void
mncp_cleanup_protocol(void)
{
g_hash_table_destroy(mncp_rhash);
}
static mncp_rhash_value*
mncp_hash_insert(conversation_t *conversation, guint32 nwconnection, guint8 nwtask, packet_info *pinfo)
{
mncp_rhash_key *key;
mncp_rhash_value *value;
/* Now remember the request, so we can find it if we later
a reply to it. Track by conversation, connection, and task number.
in NetWare these values determine each unique session */
key = wmem_new(wmem_file_scope(), mncp_rhash_key);
key->conversation = conversation;
key->nwconnection = nwconnection;
key->nwtask = nwtask;
value = wmem_new(wmem_file_scope(), mncp_rhash_value);
g_hash_table_insert(mncp_rhash, key, value);
if (ncp_echo_conn && nwconnection != 65535) {
expert_add_info_format(pinfo, NULL, &ei_ncp_new_server_session, "Detected New Server Session. Connection %d, Task %d", nwconnection, nwtask);
value->session_start_packet_num = pinfo->fd->num;
}
return value;
}
/* Returns the ncp_rec*, or NULL if not found. */
static mncp_rhash_value*
mncp_hash_lookup(conversation_t *conversation, guint32 nwconnection, guint8 nwtask)
{
mncp_rhash_key key;
key.conversation = conversation;
key.nwconnection = nwconnection;
key.nwtask = nwtask;
return (mncp_rhash_value *)g_hash_table_lookup(mncp_rhash, &key);
}
static const char* ncp_conv_get_filter_type(conv_item_t* conv _U_, conv_filter_type_e filter)
{
if ((filter == CONV_FT_SRC_PORT) || (filter == CONV_FT_DST_PORT) || (filter == CONV_FT_ANY_PORT))
return "ncp.connection";
return CONV_FILTER_INVALID;
}
static ct_dissector_info_t ncp_ct_dissector_info = {&ncp_conv_get_filter_type};
static int
ncp_conversation_packet(void *pct, packet_info *pinfo, epan_dissect_t *edt _U_, const void *vip)
{
conv_hash_t *hash = (conv_hash_t*) pct;
const struct ncp_common_header *ncph=(const struct ncp_common_header *)vip;
guint32 connection;
connection = (ncph->conn_high * 256)+ncph->conn_low;
if (connection < 65535) {
add_conversation_table_data(hash, &pinfo->src, &pinfo->dst, connection, connection, 1, pinfo->fd->pkt_len, &pinfo->rel_ts, &pinfo->fd->abs_ts, &ncp_ct_dissector_info, PT_NCP);
}
return 1;
}
static const char* ncp_host_get_filter_type(hostlist_talker_t* host _U_, conv_filter_type_e filter)
{
return ncp_conv_get_filter_type(NULL, filter);
}
static hostlist_dissector_info_t ncp_host_dissector_info = {&ncp_host_get_filter_type};
static int
ncp_hostlist_packet(void *pit, packet_info *pinfo, epan_dissect_t *edt _U_, const void *vip _U_)
{
conv_hash_t *hash = (conv_hash_t*) pit;
/*const ncp_common_header *ncphdr=vip;*/
/* Take two "add" passes per packet, adding for each direction, ensures that all
packets are counted properly (even if address is sending to itself)
XXX - this could probably be done more efficiently inside hostlist_table */
add_hostlist_table_data(hash, &pinfo->src, 0, TRUE, 1, pinfo->fd->pkt_len, &ncp_host_dissector_info, PT_NCP);
add_hostlist_table_data(hash, &pinfo->dst, 0, FALSE, 1, pinfo->fd->pkt_len, &ncp_host_dissector_info, PT_NCP);
return 1;
}
/*
* Burst packet system flags.
*/
#define ABT 0x04 /* Abort request */
#define BSY 0x08 /* Server Busy */
#define EOB 0x10 /* End of burst */
#define LST 0x40 /* Include Fragment List */
#define SYS 0x80 /* System packet */
static void
dissect_ncp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
gboolean is_tcp)
{
proto_tree *ncp_tree = NULL;
proto_item *ti;
struct ncp_ip_header ncpiph;
struct ncp_ip_rqhdr ncpiphrq;
guint16 ncp_burst_seqno, ncp_ack_seqno;
guint16 flags = 0;
proto_tree *flags_tree = NULL;
int hdr_offset = 0;
int commhdr = 0;
int offset = 0;
gint length_remaining;
tvbuff_t *next_tvb;
guint32 testvar = 0, ncp_burst_command, burst_len, burst_off, burst_file;
guint8 subfunction;
guint32 nw_connection = 0, data_offset;
guint16 data_len = 0;
guint16 missing_fraglist_count = 0;
mncp_rhash_value *request_value = NULL;
conversation_t *conversation;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "NCP");
col_clear(pinfo->cinfo, COL_INFO);
ncp_hdr = &header;
ti = proto_tree_add_item(tree, proto_ncp, tvb, 0, -1, ENC_NA);
ncp_tree = proto_item_add_subtree(ti, ett_ncp);
if (is_tcp) {
if (tvb_get_ntohl(tvb, hdr_offset) != NCPIP_RQST && tvb_get_ntohl(tvb, hdr_offset) != NCPIP_RPLY)
commhdr += 1;
/* Get NCPIP Header data */
ncpiph.signature = tvb_get_ntohl(tvb, commhdr);
proto_tree_add_uint(ncp_tree, hf_ncp_ip_sig, tvb, commhdr, 4, ncpiph.signature);
ncpiph.length = (0x7fffffff & tvb_get_ntohl(tvb, commhdr+4));
proto_tree_add_uint(ncp_tree, hf_ncp_ip_length, tvb, commhdr+4, 4, ncpiph.length);
commhdr += 8;
if (ncpiph.signature == NCPIP_RQST) {
ncpiphrq.version = tvb_get_ntohl(tvb, commhdr);
proto_tree_add_uint(ncp_tree, hf_ncp_ip_ver, tvb, commhdr, 4, ncpiphrq.version);
commhdr += 4;
ncpiphrq.rplybufsize = tvb_get_ntohl(tvb, commhdr);
proto_tree_add_uint(ncp_tree, hf_ncp_ip_rplybufsize, tvb, commhdr, 4, ncpiphrq.rplybufsize);
commhdr += 4;
}
/* Check to see if this is a valid offset, otherwise increment for packet signature */
if (try_val_to_str(tvb_get_ntohs(tvb, commhdr), ncp_type_vals)==NULL) {
/* Check to see if we have a valid type after packet signature length */
if (try_val_to_str(tvb_get_ntohs(tvb, commhdr+8), ncp_type_vals)!=NULL) {
proto_tree_add_item(ncp_tree, hf_ncp_ip_packetsig, tvb, commhdr, 8, ENC_NA);
commhdr += 8;
}
}
} else {
/* Initialize this structure, we use it below */
memset(&ncpiph, 0, sizeof(ncpiph));
}
header.type = tvb_get_ntohs(tvb, commhdr);
header.sequence = tvb_get_guint8(tvb, commhdr+2);
header.conn_low = tvb_get_guint8(tvb, commhdr+3);
header.task = tvb_get_guint8(tvb, commhdr+4);
header.conn_high = tvb_get_guint8(tvb, commhdr+5);
proto_tree_add_uint(ncp_tree, hf_ncp_type, tvb, commhdr, 2, header.type);
nw_connection = (header.conn_high*256)+header.conn_low;
/* Ok, we need to track the conversation so that we can
* determine if a new server session is occuring for this
* connection.
*/
conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
PT_NCP, (guint32) pinfo->srcport, (guint32) pinfo->destport,
0);
if ((ncpiph.length & 0x80000000) || ncpiph.signature == NCPIP_RPLY) {
/* First time through we will record the initial connection and task
* values
*/
if (!pinfo->fd->flags.visited) {
if (conversation != NULL) {
/* find the record telling us the
* request made that caused this
* reply
*/
request_value = mncp_hash_lookup(conversation, nw_connection, header.task);
/* if for some reason we have no
* conversation in our hash, create
* one */
if (request_value == NULL) {
mncp_hash_insert(conversation, nw_connection, header.task, pinfo);
}
} else {
/* It's not part of any conversation
* - create a new one.
*/
conversation = conversation_new(pinfo->fd->num, &pinfo->src,
&pinfo->dst, PT_NCP, (guint32) pinfo->srcport, (guint32) pinfo->destport, 0);
mncp_hash_insert(conversation, nw_connection, header.task, pinfo);
}
/* If this is a request packet then we
* might have a new task
*/
if (ncpiph.signature == NCPIP_RPLY) {
/* Now on reply packets we have to
* use the state of the original
* request packet, so look up the
* request value and check the task number
*/
/*request_value = mncp_hash_lookup(conversation, nw_connection, header.task);*/
}
} else {
/* Get request value data */
request_value = mncp_hash_lookup(conversation, nw_connection, header.task);
if (request_value) {
if ((request_value->session_start_packet_num == pinfo->fd->num) && ncp_echo_conn) {
expert_add_info_format(pinfo, NULL, &ei_ncp_new_server_session, "Detected New Server Session. Connection %d, Task %d", nw_connection, header.task);
}
}
}
} else {
if (!pinfo->fd->flags.visited) {
if (conversation != NULL) {
/* find the record telling us the
* request made that caused this
* reply
*/
request_value = mncp_hash_lookup(conversation, nw_connection, header.task);
/* if for some reason we have no
* conversation in our hash, create
* one */
if (request_value == NULL) {
mncp_hash_insert(conversation, nw_connection, header.task, pinfo);
}
} else {
/* It's not part of any conversation
* - create a new one.
*/
conversation = conversation_new(pinfo->fd->num, &pinfo->src,
&pinfo->dst, PT_NCP, (guint32) pinfo->srcport, (guint32) pinfo->destport, 0);
mncp_hash_insert(conversation, nw_connection, header.task, pinfo);
}
/* find the record telling us the request
* made that caused this reply
*/
} else {
request_value = mncp_hash_lookup(conversation, nw_connection, header.task);
if (request_value) {
if ((request_value->session_start_packet_num == pinfo->fd->num) && ncp_echo_conn) {
expert_add_info_format(pinfo, NULL, &ei_ncp_new_server_session, "Detected New Server Session. Connection %d, Task %d", nw_connection, header.task);
}
}
}
}
tap_queue_packet(ncp_tap.hdr, pinfo, ncp_hdr);
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(header.type, ncp_type_vals, "Unknown type (0x%04x)"));
/*
* Process the packet-type-specific header.
*/
switch (header.type) {
case NCP_BROADCAST_SLOT: /* Server Broadcast */
proto_tree_add_uint(ncp_tree, hf_ncp_seq, tvb, commhdr + 2, 1, header.sequence);
proto_tree_add_uint(ncp_tree, hf_ncp_connection,tvb, commhdr + 3, 3, nw_connection);
proto_tree_add_item(ncp_tree, hf_ncp_task, tvb, commhdr + 4, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_oplock_flag, tvb, commhdr + 9, 1, tvb_get_guint8(tvb, commhdr+9));
proto_tree_add_item(ncp_tree, hf_ncp_oplock_handle, tvb, commhdr + 10, 4, ENC_BIG_ENDIAN);
if ((tvb_get_guint8(tvb, commhdr+9)==0x24) && ncp_echo_file) {
expert_add_info_format(pinfo, NULL, &ei_ncp_oplock_handle, "Server requesting station to clear oplock on handle - %08x", tvb_get_ntohl(tvb, commhdr+10));
}
break;
case NCP_LIP_ECHO: /* Lip Echo Packet */
proto_tree_add_item(ncp_tree, hf_lip_echo, tvb, commhdr, 13, ENC_ASCII|ENC_NA);
break;
case NCP_BURST_MODE_XFER: /* Packet Burst Packet */
/*
* XXX - we should keep track of whether there's a burst
* outstanding on a connection and, if not, treat the
* beginning of the data as a burst header.
*
* The burst header contains:
*
* 4 bytes of little-endian function number:
* 1 = read, 2 = write;
*
* 4 bytes of file handle;
*
* 8 reserved bytes;
*
* 4 bytes of big-endian file offset;
*
* 4 bytes of big-endian byte count.
*
* The data follows for a burst write operation.
*
* The first packet of a burst read reply contains:
*
* 4 bytes of little-endian result code:
* 0: No error
* 1: Initial error
* 2: I/O error
* 3: No data read;
*
* 4 bytes of returned byte count (big-endian?).
*
* The data follows.
*
* Each burst of a write request is responded to with a
* burst packet with a 2-byte little-endian result code:
*
* 0: Write successful
* 4: Write error
*/
flags = tvb_get_guint8(tvb, commhdr + 2);
ti = proto_tree_add_uint(ncp_tree, hf_ncp_system_flags,
tvb, commhdr + 2, 1, flags);
flags_tree = proto_item_add_subtree(ti, ett_ncp_system_flags);
proto_tree_add_item(flags_tree, hf_ncp_system_flags_abt,
tvb, commhdr + 2, 1, ENC_BIG_ENDIAN);
if (flags & ABT) {
proto_item_append_text(ti, " ABT");
}
flags&=(~( ABT ));
proto_tree_add_item(flags_tree, hf_ncp_system_flags_bsy,
tvb, commhdr + 2, 1, ENC_BIG_ENDIAN);
if (flags & BSY) {
proto_item_append_text(ti, " BSY");
}
flags&=(~( BSY ));
proto_tree_add_item(flags_tree, hf_ncp_system_flags_eob,
tvb, commhdr + 2, 1, ENC_BIG_ENDIAN);
if (flags & EOB) {
proto_item_append_text(ti, " EOB");
}
flags&=(~( EOB ));
proto_tree_add_item(flags_tree, hf_ncp_system_flags_lst,
tvb, commhdr + 2, 1, ENC_BIG_ENDIAN);
if (flags & LST) {
proto_item_append_text(ti, " LST");
}
flags&=(~( LST ));
proto_tree_add_item(flags_tree, hf_ncp_system_flags_sys,
tvb, commhdr + 2, 1, ENC_BIG_ENDIAN);
if (flags & SYS) {
proto_item_append_text(ti, " SYS");
}
flags&=(~( SYS ));
proto_tree_add_item(ncp_tree, hf_ncp_stream_type,
tvb, commhdr + 3, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_src_connection,
tvb, commhdr + 4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_dst_connection,
tvb, commhdr + 8, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_packet_seqno,
tvb, commhdr + 12, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_delay_time,
tvb, commhdr + 16, 4, ENC_BIG_ENDIAN);
ncp_burst_seqno = tvb_get_ntohs(tvb, commhdr+20);
proto_tree_add_item(ncp_tree, hf_ncp_burst_seqno,
tvb, commhdr + 20, 2, ENC_BIG_ENDIAN);
ncp_ack_seqno = tvb_get_ntohs(tvb, commhdr+22);
proto_tree_add_item(ncp_tree, hf_ncp_ack_seqno,
tvb, commhdr + 22, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_burst_len,
tvb, commhdr + 24, 4, ENC_BIG_ENDIAN);
data_offset = tvb_get_ntohl(tvb, commhdr + 28);
proto_tree_add_uint(ncp_tree, hf_ncp_data_offset,
tvb, commhdr + 28, 4, data_offset);
data_len = tvb_get_ntohs(tvb, commhdr + 32);
proto_tree_add_uint(ncp_tree, hf_ncp_data_bytes,
tvb, commhdr + 32, 2, data_len);
missing_fraglist_count = tvb_get_ntohs(tvb, commhdr + 34);
proto_tree_add_item(ncp_tree, hf_ncp_missing_fraglist_count,
tvb, commhdr + 34, 2, ENC_BIG_ENDIAN);
offset = commhdr + 36;
if (!(flags & SYS) && ncp_burst_seqno == ncp_ack_seqno &&
data_offset == 0) {
/*
* This is either a Burst Read or Burst Write
* command. The data length includes the burst
* mode header, plus any data in the command
* (there shouldn't be any in a read, but there
* might be some in a write).
*/
if (data_len < 4)
return;
ncp_burst_command = tvb_get_ntohl(tvb, offset);
proto_tree_add_item(ncp_tree, hf_ncp_burst_command,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
data_len -= 4;
if (data_len < 4)
return;
burst_file = tvb_get_ntohl(tvb, offset);
proto_tree_add_item(ncp_tree, hf_ncp_burst_file_handle,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
data_len -= 4;
if (data_len < 8)
return;
proto_tree_add_item(ncp_tree, hf_ncp_burst_reserved,
tvb, offset, 8, ENC_NA);
offset += 8;
data_len -= 8;
if (data_len < 4)
return;
burst_off = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(ncp_tree, hf_ncp_burst_offset,
tvb, offset, 4, burst_off);
offset += 4;
data_len -= 4;
if (data_len < 4)
return;
burst_len = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(ncp_tree, hf_ncp_burst_len,
tvb, offset, 4, burst_len);
offset += 4;
data_len -= 4;
col_add_fstr(pinfo->cinfo, COL_INFO,
"%s %d bytes starting at offset %d in file 0x%08x",
val_to_str(ncp_burst_command,
burst_command, "Unknown (0x%08x)"),
burst_len, burst_off, burst_file);
break;
} else {
if (tvb_get_guint8(tvb, commhdr + 2) & 0x10) {
col_set_str(pinfo->cinfo, COL_INFO, "End of Burst");
}
}
break;
case NCP_ALLOCATE_SLOT: /* Allocate Slot Request */
length_remaining = tvb_reported_length_remaining(tvb, commhdr + 4);
if (length_remaining > 4) {
testvar = tvb_get_ntohl(tvb, commhdr+4);
if (testvar == 0x4c495020) {
proto_tree_add_item(ncp_tree, hf_lip_echo, tvb, commhdr+4, 13, ENC_ASCII|ENC_NA);
break;
}
}
/* otherwise fall through */
case NCP_POSITIVE_ACK: /* Positive Acknowledgement */
case NCP_SERVICE_REQUEST: /* Server NCP Request */
case NCP_SERVICE_REPLY: /* Server NCP Reply */
case NCP_WATCHDOG: /* Watchdog Packet */
case NCP_DEALLOCATE_SLOT: /* Deallocate Slot Request */
default:
proto_tree_add_uint(ncp_tree, hf_ncp_seq, tvb, commhdr + 2, 1, header.sequence);
proto_tree_add_uint(ncp_tree, hf_ncp_connection,tvb, commhdr + 3, 3, nw_connection);
proto_tree_add_item(ncp_tree, hf_ncp_task, tvb, commhdr + 4, 1, ENC_BIG_ENDIAN);
break;
}
/*
* Process the packet body.
*/
switch (header.type) {
case NCP_ALLOCATE_SLOT: /* Allocate Slot Request */
length_remaining = tvb_reported_length_remaining(tvb, commhdr + 4);
if (length_remaining > 4) {
testvar = tvb_get_ntohl(tvb, commhdr+4);
if (testvar == 0x4c495020) {
proto_tree_add_item(ncp_tree, hf_lip_echo, tvb, commhdr, -1, ENC_ASCII|ENC_NA);
/*break;*/
}
}
next_tvb = tvb_new_subset_remaining(tvb, commhdr);
dissect_ncp_request(next_tvb, pinfo, nw_connection,
header.sequence, header.type, ncp_tree);
break;
case NCP_DEALLOCATE_SLOT: /* Deallocate Slot Request */
next_tvb = tvb_new_subset_remaining(tvb, commhdr);
dissect_ncp_request(next_tvb, pinfo, nw_connection,
header.sequence, header.type, ncp_tree);
break;
case NCP_SERVICE_REQUEST: /* Server NCP Request */
case NCP_BROADCAST_SLOT: /* Server Broadcast Packet */
next_tvb = tvb_new_subset_remaining(tvb, commhdr);
if (tvb_get_guint8(tvb, commhdr+6) == 0x68) {
subfunction = tvb_get_guint8(tvb, commhdr+7);
switch (subfunction) {
case 0x02: /* NDS Frag Packet to decode */
dissect_nds_request(next_tvb, pinfo,
nw_connection, header.sequence,
header.type, ncp_tree);
break;
case 0x01: /* NDS Ping */
dissect_ping_req(next_tvb, pinfo,
nw_connection, header.sequence,
header.type, ncp_tree);
break;
default:
dissect_ncp_request(next_tvb, pinfo,
nw_connection, header.sequence,
header.type, ncp_tree);
break;
}
} else {
dissect_ncp_request(next_tvb, pinfo, nw_connection,
header.sequence, header.type, ncp_tree);
}
break;
case NCP_SERVICE_REPLY: /* Server NCP Reply */
next_tvb = tvb_new_subset_remaining(tvb, commhdr);
nds_defrag(next_tvb, pinfo, nw_connection, header.sequence,
header.type, ncp_tree, &ncp_tap);
break;
case NCP_POSITIVE_ACK: /* Positive Acknowledgement */
/*
* XXX - this used to call "nds_defrag()", which would
* clear out "frags". Was that the right thing to
* do?
*/
next_tvb = tvb_new_subset_remaining(tvb, commhdr);
dissect_ncp_reply(next_tvb, pinfo, nw_connection,
header.sequence, header.type, ncp_tree, &ncp_tap);
break;
case NCP_WATCHDOG: /* Watchdog Packet */
/*
* XXX - should the completion code be interpreted as
* it is in "packet-ncp2222.inc"? If so, this
* packet should be handled by "dissect_ncp_reply()".
*/
proto_tree_add_item(ncp_tree, hf_ncp_completion_code,
tvb, commhdr + 6, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_connection_status,
tvb, commhdr + 7, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_slot,
tvb, commhdr + 8, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ncp_tree, hf_ncp_control_code,
tvb, commhdr + 9, 1, ENC_LITTLE_ENDIAN);
/*
* Display the rest of the packet as data.
*/
if (tvb_offset_exists(tvb, commhdr + 10)) {
call_dissector(data_handle,
tvb_new_subset_remaining(tvb, commhdr + 10),
pinfo, ncp_tree);
}
break;
case NCP_BURST_MODE_XFER: /* Packet Burst Packet */
if (flags & SYS) {
/*
* System packet; show missing fragments if there
* are any.
*/
while (missing_fraglist_count != 0) {
proto_tree_add_item(ncp_tree, hf_ncp_missing_data_offset,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(ncp_tree, hf_ncp_missing_data_count,
tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
missing_fraglist_count--;
}
} else {
/*
* XXX - do this by using -1 and -1 as the length
* arguments to "tvb_new_subset()" and then calling
* "tvb_set_reported_length()"? That'll throw an
* exception if "data_len" goes past the reported
* length of the packet, but that's arguably a
* feature in this case.
*/
length_remaining = tvb_captured_length_remaining(tvb, offset);
if (length_remaining > data_len)
length_remaining = data_len;
if (data_len != 0) {
call_dissector(data_handle,
tvb_new_subset(tvb, offset,
length_remaining, data_len),
pinfo, ncp_tree);
}
}
break;
case NCP_LIP_ECHO: /* LIP Echo Packet */
proto_tree_add_item(ncp_tree, hf_lip_echo, tvb, commhdr, -1, ENC_ASCII|ENC_NA);
break;
default:
proto_tree_add_expert_format(ncp_tree, pinfo, &ei_ncp_type, tvb, commhdr + 6, -1,
"%s packets not supported yet",
val_to_str(header.type, ncp_type_vals,
"Unknown type (0x%04x)"));
break;
}
}
static int
dissect_ncp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
dissect_ncp_common(tvb, pinfo, tree, FALSE);
return tvb_captured_length(tvb);
}
static guint
get_ncp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)
{
guint32 signature;
/*
* Check the NCP-over-TCP header signature, to make sure it's there.
* If it's not there, we cannot trust the next 4 bytes to be a
* packet length+"has signature" flag, so we just say the length is
* "what remains in the packet".
*/
signature = tvb_get_ntohl(tvb, offset);
if (signature != NCPIP_RQST && signature != NCPIP_RPLY)
return tvb_captured_length_remaining(tvb, offset);
/*
* Get the length of the NCP-over-TCP packet. Strip off the "has
* signature" flag.
*/
return tvb_get_ntohl(tvb, offset + 4) & 0x7fffffff;
}
static int
dissect_ncp_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
dissect_ncp_common(tvb, pinfo, tree, TRUE);
return tvb_captured_length(tvb);
}
static int
dissect_ncp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
tcp_dissect_pdus(tvb, pinfo, tree, ncp_desegment, 8, get_ncp_pdu_len,
dissect_ncp_tcp_pdu, data);
return tvb_captured_length(tvb);
}
void
proto_register_ncp(void)
{
static hf_register_info hf[] = {
{ &hf_ncp_ip_sig,
{ "NCP over IP signature", "ncp.ip.signature",
FT_UINT32, BASE_HEX, VALS(ncp_ip_signature), 0x0,
NULL, HFILL }},
{ &hf_ncp_ip_length,
{ "NCP over IP length", "ncp.ip.length",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_ip_ver,
{ "NCP over IP Version", "ncp.ip.version",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_ip_rplybufsize,
{ "NCP over IP Reply Buffer Size", "ncp.ip.replybufsize",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_ip_packetsig,
{ "NCP over IP Packet Signature", "ncp.ip.packetsig",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_type,
{ "Type", "ncp.type",
FT_UINT16, BASE_HEX, VALS(ncp_type_vals), 0x0,
"NCP message type", HFILL }},
{ &hf_ncp_seq,
{ "Sequence Number", "ncp.seq",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_connection,
{ "Connection Number", "ncp.connection",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_task,
{ "Task Number", "ncp.task",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_oplock_flag,
{ "Broadcast Message Flag", "ncp.msg_flag",
FT_UINT8, BASE_HEX, VALS(ncp_oplock_vals), 0x0,
NULL, HFILL }},
{ &hf_ncp_oplock_handle,
{ "File Handle", "ncp.oplock_handle",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_stream_type,
{ "Stream Type", "ncp.stream_type",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Type of burst", HFILL }},
{ &hf_ncp_system_flags,
{ "System Flags", "ncp.system_flags",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_system_flags_abt,
{ "ABT", "ncp.system_flags.abt",
FT_BOOLEAN, 8, NULL, ABT,
"Is this an abort request?", HFILL }},
{ &hf_ncp_system_flags_eob,
{ "EOB", "ncp.system_flags.eob",
FT_BOOLEAN, 8, NULL, EOB,
"Is this the last packet of the burst?", HFILL }},
{ &hf_ncp_system_flags_sys,
{ "SYS", "ncp.system_flags.sys",
FT_BOOLEAN, 8, NULL, SYS,
"Is this a system packet?", HFILL }},
{ &hf_ncp_system_flags_bsy,
{ "BSY", "ncp.system_flags.bsy",
FT_BOOLEAN, 8, NULL, BSY,
"Is the server busy?", HFILL }},
{ &hf_ncp_system_flags_lst,
{ "LST", "ncp.system_flags.lst",
FT_BOOLEAN, 8, NULL, LST,
"Return Fragment List?", HFILL }},
{ &hf_ncp_src_connection,
{ "Source Connection ID", "ncp.src_connection",
FT_UINT32, BASE_DEC, NULL, 0x0,
"The workstation's connection identification number", HFILL }},
{ &hf_ncp_dst_connection,
{ "Destination Connection ID", "ncp.dst_connection",
FT_UINT32, BASE_DEC, NULL, 0x0,
"The server's connection identification number", HFILL }},
{ &hf_ncp_packet_seqno,
{ "Packet Sequence Number", "ncp.packet_seqno",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Sequence number of this packet in a burst", HFILL }},
{ &hf_ncp_delay_time,
{ "Delay Time", "ncp.delay_time", /* in 100 us increments */
FT_UINT32, BASE_DEC, NULL, 0x0,
"Delay time between consecutive packet sends (100 us increments)", HFILL }},
{ &hf_ncp_burst_seqno,
{ "Burst Sequence Number", "ncp.burst_seqno",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Sequence number of this packet in the burst", HFILL }},
{ &hf_ncp_ack_seqno,
{ "ACK Sequence Number", "ncp.ack_seqno",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Next expected burst sequence number", HFILL }},
{ &hf_ncp_burst_len,
{ "Burst Length", "ncp.burst_len",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Total length of data in this burst", HFILL }},
{ &hf_ncp_burst_offset,
{ "Burst Offset", "ncp.burst_offset",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Offset of data in the burst", HFILL }},
{ &hf_ncp_data_offset,
{ "Data Offset", "ncp.data_offset",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Offset of this packet", HFILL }},
{ &hf_ncp_data_bytes,
{ "Data Bytes", "ncp.data_bytes",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Number of data bytes in this packet", HFILL }},
{ &hf_ncp_missing_fraglist_count,
{ "Missing Fragment List Count", "ncp.missing_fraglist_count",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Number of missing fragments reported", HFILL }},
{ &hf_ncp_missing_data_offset,
{ "Missing Data Offset", "ncp.missing_data_offset",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Offset of beginning of missing data", HFILL }},
{ &hf_ncp_missing_data_count,
{ "Missing Data Count", "ncp.missing_data_count",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Number of bytes of missing data", HFILL }},
{ &hf_ncp_completion_code,
{ "Completion Code", "ncp.completion_code",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_connection_status,
{ "Connection Status", "ncp.connection_status",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_slot,
{ "Slot", "ncp.slot",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_control_code,
{ "Control Code", "ncp.control_code",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
#if 0
{ &hf_ncp_fragment_handle,
{ "Fragment Handle", "ncp.fragger_hndl",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
#endif
{ &hf_lip_echo,
{ "Large Internet Packet Echo", "ncp.lip_echo",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ncp_burst_command,
{ "Burst Command", "ncp.burst_command",
FT_UINT32, BASE_HEX, VALS(burst_command), 0x0,
"Packet Burst Command", HFILL }},
{ &hf_ncp_burst_file_handle,
{ "Burst File Handle", "ncp.burst_file_handle",
FT_UINT32, BASE_HEX, NULL, 0x0,
"Packet Burst File Handle", HFILL }},
{ &hf_ncp_burst_reserved,
{ "Reserved", "ncp.burst_reserved",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}
};
static gint *ett[] = {
&ett_ncp,
&ett_ncp_system_flags,
&ett_nds,
&ett_nds_segments,
&ett_nds_segment
};
static ei_register_info ei[] = {
{ &ei_ncp_new_server_session, { "ncp.new_server_session", PI_RESPONSE_CODE, PI_CHAT, "Detected New Server Session", EXPFILL }},
{ &ei_ncp_oplock_handle, { "ncp.oplock_handle.clear", PI_RESPONSE_CODE, PI_CHAT, "Server requesting station to clear oplock", EXPFILL }},
{ &ei_ncp_type, { "ncp.type.unsupported", PI_UNDECODED, PI_NOTE, "Packet type not supported yet", EXPFILL }},
};
module_t *ncp_module;
expert_module_t* expert_ncp;
proto_ncp = proto_register_protocol("NetWare Core Protocol", "NCP", "ncp");
proto_register_field_array(proto_ncp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_ncp = expert_register_protocol(proto_ncp);
expert_register_field_array(expert_ncp, ei, array_length(ei));
ncp_module = prefs_register_protocol(proto_ncp, NULL);
prefs_register_obsolete_preference(ncp_module, "initial_hash_size");
prefs_register_bool_preference(ncp_module, "desegment",
"Reassemble NCP-over-TCP messages spanning multiple TCP segments",
"Whether the NCP dissector should reassemble messages spanning multiple TCP segments."
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
&ncp_desegment);
prefs_register_bool_preference(ncp_module, "defragment_nds",
"Reassemble fragmented NDS messages spanning multiple reply packets",
"Whether the NCP dissector should defragment NDS messages spanning multiple reply packets.",
&nds_defragment);
prefs_register_bool_preference(ncp_module, "newstyle",
"Dissect New Netware Information Structure",
"Dissect the NetWare Information Structure as NetWare 5.x or higher or as older NetWare 3.x.",
&ncp_newstyle);
prefs_register_bool_preference(ncp_module, "eid_2_expert",
"Expert: EID to Name lookups?",
"Whether the NCP dissector should echo the NDS Entry ID to name resolves to the expert table.",
&nds_echo_eid);
prefs_register_bool_preference(ncp_module, "connection_2_expert",
"Expert: NCP Connections?",
"Whether the NCP dissector should echo NCP connection information to the expert table.",
&ncp_echo_conn);
prefs_register_bool_preference(ncp_module, "error_2_expert",
"Expert: NCP Errors?",
"Whether the NCP dissector should echo protocol errors to the expert table.",
&ncp_echo_err);
prefs_register_bool_preference(ncp_module, "server_2_expert",
"Expert: Server Information?",
"Whether the NCP dissector should echo server information to the expert table.",
&ncp_echo_server);
prefs_register_bool_preference(ncp_module, "file_2_expert",
"Expert: File Information?",
"Whether the NCP dissector should echo file open/close/oplock information to the expert table.",
&ncp_echo_file);
register_init_routine(&mncp_init_protocol);
register_cleanup_routine(&mncp_cleanup_protocol);
ncp_tap.stat=register_tap("ncp_srt");
ncp_tap.hdr=register_tap("ncp");
register_conversation_table(proto_ncp, FALSE, ncp_conversation_packet, ncp_hostlist_packet);
register_srt_table(proto_ncp, "ncp_srt", 24, ncpstat_packet, ncpstat_init, NULL);
}
void
proto_reg_handoff_ncp(void)
{
dissector_handle_t ncp_handle;
dissector_handle_t ncp_tcp_handle;
ncp_handle = create_dissector_handle(dissect_ncp, proto_ncp);
ncp_tcp_handle = create_dissector_handle(dissect_ncp_tcp, proto_ncp);
dissector_add_uint("tcp.port", TCP_PORT_NCP, ncp_tcp_handle);
dissector_add_uint("udp.port", UDP_PORT_NCP, ncp_handle);
dissector_add_uint("ipx.packet_type", IPX_PACKET_TYPE_NCP, ncp_handle);
dissector_add_uint("ipx.socket", IPX_SOCKET_NCP, ncp_handle);
data_handle = find_dissector("data");
}
/*
* 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:
*/
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