forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Change-Id: I92c94448e6641716d03158a5f332c8b53709423a Reviewed-on: https://code.wireshark.org/review/25756 Petri-Dish: Dario Lombardo <lomato@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
259 lines
6.7 KiB
C
259 lines
6.7 KiB
C
/* packet-smb-mailslot.c
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* Routines for SMB mailslot packet dissection
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* Copyright 2000, Jeffrey C. Foster <jfoste@woodward.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-pop.c
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include "packet-smb.h"
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#include "packet-smb-mailslot.h"
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void proto_register_smb_mailslot(void);
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void proto_reg_handoff_smb_mailslot(void);
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static int proto_smb_msp = -1;
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static int hf_opcode = -1;
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static int hf_priority = -1;
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static int hf_class = -1;
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static int hf_size = -1;
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static int hf_name = -1;
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static int ett_smb_msp = -1;
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static dissector_handle_t mailslot_browse_handle;
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static dissector_handle_t mailslot_lanman_handle;
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static dissector_handle_t netlogon_handle;
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#define MAILSLOT_UNKNOWN 0
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#define MAILSLOT_BROWSE 1
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#define MAILSLOT_LANMAN 2
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#define MAILSLOT_NET 3
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#define MAILSLOT_TEMP_NETLOGON 4
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#define MAILSLOT_MSSP 5
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static const value_string opcode_vals[] = {
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{1, "Write Mail Slot"},
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{0, NULL}
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};
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static const value_string class_vals[] = {
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{1, "Reliable"},
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{2, "Unreliable & Broadcast"},
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{0, NULL}
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};
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/* decode the SMB mail slot protocol
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for requests
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mailslot is the name of the mailslot, e.g. BROWSE
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si->trans_subcmd is set to the symbolic constant matching the mailslot name.
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for responses
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mailslot is NULL
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si->trans_subcmd gives us which mailslot this response refers to.
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*/
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gboolean
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dissect_mailslot_smb(tvbuff_t *mshdr_tvb, tvbuff_t *setup_tvb,
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tvbuff_t *tvb, const char *mailslot, packet_info *pinfo,
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proto_tree *parent_tree, smb_info_t* smb_info)
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{
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smb_transact_info_t *tri;
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int trans_subcmd;
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proto_tree *tree = NULL;
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proto_item *item = NULL;
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guint16 opcode;
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int offset = 0;
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int len;
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if (!proto_is_protocol_enabled(find_protocol_by_id(proto_smb_msp))) {
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return FALSE;
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}
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pinfo->current_proto = "SMB Mailslot";
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMB Mailslot");
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if ((tvb==NULL) || (tvb_reported_length(tvb)==0)) {
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/* Interim reply */
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col_set_str(pinfo->cinfo, COL_INFO, "Interim reply");
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return TRUE;
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}
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col_clear(pinfo->cinfo, COL_INFO);
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if (smb_info->sip != NULL && smb_info->sip->extra_info_type == SMB_EI_TRI)
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tri = (smb_transact_info_t *)smb_info->sip->extra_info;
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else
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tri = NULL;
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/* check which mailslot this is about */
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trans_subcmd=MAILSLOT_UNKNOWN;
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if(smb_info->request){
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if(strncmp(mailslot,"BROWSE",6) == 0){
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trans_subcmd=MAILSLOT_BROWSE;
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} else if(strncmp(mailslot,"LANMAN",6) == 0){
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trans_subcmd=MAILSLOT_LANMAN;
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} else if(strncmp(mailslot,"NET",3) == 0){
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trans_subcmd=MAILSLOT_NET;
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} else if(strncmp(mailslot,"TEMP\\NETLOGON",13) == 0){
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trans_subcmd=MAILSLOT_TEMP_NETLOGON;
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} else if(strncmp(mailslot,"MSSP",4) == 0){
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trans_subcmd=MAILSLOT_MSSP;
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}
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if (!pinfo->fd->flags.visited) {
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if (tri != NULL)
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tri->trans_subcmd = trans_subcmd;
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}
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} else {
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if(!tri){
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return FALSE;
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} else {
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trans_subcmd = tri->trans_subcmd;
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}
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}
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/* Only do these ones if we have them. For fragmented SMB Transactions
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we may only have the setup area for the first fragment
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*/
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if(mshdr_tvb && setup_tvb){
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if (parent_tree) {
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item = proto_tree_add_item(parent_tree, proto_smb_msp,
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mshdr_tvb, 0, -1, ENC_NA);
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tree = proto_item_add_subtree(item, ett_smb_msp);
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}
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/* do the opcode field */
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opcode = tvb_get_letohs(setup_tvb, offset);
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col_add_str(pinfo->cinfo, COL_INFO,
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val_to_str(opcode, opcode_vals, "Unknown opcode: 0x%04x"));
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/* These are in the setup words; use "setup_tvb". */
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/* opcode */
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proto_tree_add_uint(tree, hf_opcode, setup_tvb, offset, 2,
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opcode);
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offset += 2;
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/* priority */
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proto_tree_add_item(tree, hf_priority, setup_tvb, offset, 2,
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ENC_LITTLE_ENDIAN);
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offset += 2;
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/* class */
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proto_tree_add_item(tree, hf_class, setup_tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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/* These are in the rest of the data; use "mshdr_tvb", which
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starts at the same place "setup_tvb" does. */
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/* size */
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/* this is actually bytecount in the SMB Transaction command */
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proto_tree_add_item(tree, hf_size, mshdr_tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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/* mailslot name */
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len = tvb_strsize(mshdr_tvb, offset);
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proto_tree_add_item(tree, hf_name, mshdr_tvb, offset, len, ENC_ASCII|ENC_NA);
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offset += len;
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proto_item_set_len(item, offset);
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}
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switch(trans_subcmd){
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case MAILSLOT_BROWSE:
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call_dissector(mailslot_browse_handle, tvb, pinfo,
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parent_tree);
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break;
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case MAILSLOT_LANMAN:
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call_dissector(mailslot_lanman_handle, tvb, pinfo,
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parent_tree);
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break;
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case MAILSLOT_NET:
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case MAILSLOT_TEMP_NETLOGON:
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case MAILSLOT_MSSP:
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call_dissector(netlogon_handle, tvb, pinfo,
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parent_tree);
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break;
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default:
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/*
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* We dissected the mailslot header, but we don't know
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* how to dissect the message; dissect the latter as data,
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* but indicate that we successfully dissected the mailslot
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* stuff.
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*/
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call_data_dissector(tvb, pinfo, parent_tree);
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break;
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}
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return TRUE;
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}
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void
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proto_register_smb_mailslot(void)
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{
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static hf_register_info hf[] = {
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{ &hf_opcode,
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{ "Opcode", "mailslot.opcode", FT_UINT16, BASE_DEC,
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VALS(opcode_vals), 0, "MAILSLOT OpCode", HFILL }},
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{ &hf_priority,
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{ "Priority", "mailslot.priority", FT_UINT16, BASE_DEC,
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NULL, 0, "MAILSLOT Priority of transaction", HFILL }},
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{ &hf_class,
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{ "Class", "mailslot.class", FT_UINT16, BASE_DEC,
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VALS(class_vals), 0, "MAILSLOT Class of transaction", HFILL }},
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{ &hf_size,
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{ "Size", "mailslot.size", FT_UINT16, BASE_DEC,
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NULL, 0, "MAILSLOT Total size of mail data", HFILL }},
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{ &hf_name,
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{ "Mailslot Name", "mailslot.name", FT_STRING, BASE_NONE,
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NULL, 0, "MAILSLOT Name of mailslot", HFILL }},
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};
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static gint *ett[] = {
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&ett_smb_msp
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};
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proto_smb_msp = proto_register_protocol(
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"SMB MailSlot Protocol", "SMB Mailslot", "mailslot");
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proto_register_field_array(proto_smb_msp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_smb_mailslot(void)
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{
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mailslot_browse_handle = find_dissector_add_dependency("mailslot_browse", proto_smb_msp);
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mailslot_lanman_handle = find_dissector_add_dependency("mailslot_lanman", proto_smb_msp);
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netlogon_handle = find_dissector_add_dependency("smb_netlogon", proto_smb_msp);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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