525 lines
19 KiB
C
525 lines
19 KiB
C
/* packet-aastra-aasp.c
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* Routines for AASP (Aastra Signalling Protocol) packet dissection.
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* Copyright 2011, Marek Tews <marek.tews@gmail.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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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/*
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* AASP over SIP
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* Content-Type: message/x-aasp-signalling
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*/
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#include "config.h"
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#include <epan/packet.h>
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/* commands id */
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#define BEGIN_BLOCK_DATA 0x80
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#define WINDOW 0x81
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#define TITLE 0x83
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#define ROW 0x84
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#define MENU_ITEM 0x85
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#define CONTEXT_INFO 0x86
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#define BUTTON_PRESSED 0x87
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#define COLUMN 0x88
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#define SET_TEXT 0x89
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#define DATE_TIME_INFO 0xA4
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#define INCOMING_CALLER 0xA5
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#define DO_COMMAND 0xA9
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#define PUSH_BTN_C 0xC8
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#define PUSH_BTN_TASK 0xC9
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#define PUSH_BTN_PLUS 0xCA
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#define PUSH_BTN_MINUS 0xCB
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#define PUSH_BTN_MIC 0xCC
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#define PUSH_BTN_SPK 0xCD
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#define PUSH_BTN_TBOOK 0xCE
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#define PUSH_BTN_DBL_ARROW 0xCF
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#define PUSH_BTN_ON_HOOK 0xD0
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#define PUSH_BTN_OFF_HOOK 0xD1
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#define PUSH_BTN_UP 0xD2
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#define PUSH_BTN_DOWN 0xD3
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#define PUSH_BTN_LEFT 0xD4
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#define PUSH_BTN_RIGHT 0xD5
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#define END_BLOCK_DATA 0xFE
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/* Forward declarations */
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void proto_register_aasp(void);
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void proto_reg_handoff_aasp(void);
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/* Initialize the protocol and registered fields */
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static gint proto_aasp = -1;
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static gint hf_a_data = -1;
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static gint hf_a_cmd = -1;
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static gint hf_a_id = -1;
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static gint hf_a_length = -1;
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static gint hf_a_text = -1;
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static gint hf_a_line = -1;
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static gint hf_a_cdpn = -1;
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static gint hf_a_button_id = -1;
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static gint hf_a_attr = -1;
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static gint hf_a_item = -1;
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static gint hf_a_hour = -1;
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static gint hf_a_minute = -1;
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static gint hf_a_day = -1;
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static gint hf_a_month = -1;
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static gint hf_a_weekofyear = -1;
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static gint hf_a_weekday = -1;
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static gint hf_a_month_name = -1;
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static gint hf_a_weekofyear_prefix = -1;
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/* Initialize the subtree pointers */
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static gint ett_aasp = -1;
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static gint ett_a_cmd = -1;
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static gint ett_a_item = -1;
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/* Preferences */
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/**
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* Commands
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*/
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static const value_string szCmdID[] =
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{
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{ BEGIN_BLOCK_DATA, "Begin Block Data" },
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{ WINDOW, "Window" },
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{ TITLE, "Title" },
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{ ROW, "Row" },
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{ MENU_ITEM, "Menu Item" },
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{ CONTEXT_INFO, "Context Info" },
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{ BUTTON_PRESSED, "Button Pressed" },
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{ COLUMN, "Column" },
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{ SET_TEXT, "Set Text" },
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{ DATE_TIME_INFO, "Date Time Info" },
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{ INCOMING_CALLER, "Incoming Caller" },
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{ DO_COMMAND, "Do Command" },
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{ PUSH_BTN_C, "Push Button 'C'" },
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{ PUSH_BTN_TASK, "Push Button 'Task'" },
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{ PUSH_BTN_PLUS, "Push Button '+'" },
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{ PUSH_BTN_MINUS, "Push Button '-'" },
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{ PUSH_BTN_MIC, "Push Button 'Microphone'" },
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{ PUSH_BTN_SPK, "Push Button 'Speaker'" },
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{ PUSH_BTN_TBOOK, "Push Button 'Telephone Book'" },
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{ PUSH_BTN_DBL_ARROW, "Push Button 'Double-Arrow'" },
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{ PUSH_BTN_ON_HOOK, "Red Button 'On Hook'" },
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{ PUSH_BTN_OFF_HOOK, "Green Button 'Off Hook'" },
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{ PUSH_BTN_UP, "Push Button 'Up'" },
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{ PUSH_BTN_DOWN, "Push Button 'Down'" },
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{ PUSH_BTN_LEFT, "Push Button 'Left'" },
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{ PUSH_BTN_RIGHT, "Push Button 'Right'" },
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{ END_BLOCK_DATA, "End Block Data" },
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{ 0, NULL }
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};
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/**
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* Dissect single command
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*/
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static void
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dissect_a_binary_command(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *subtree;
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const guint8* pstr;
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guint i, len;
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/* create command subtree */
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ti = proto_tree_add_item(tree, hf_a_cmd, tvb, 0, -1, ENC_NA);
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subtree = proto_item_add_subtree(ti, ett_a_cmd);
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proto_item_append_text(ti, ", %s", val_to_str(tvb_get_guint8(tvb, 0), szCmdID, "Unk %d"));
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/* command id */
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proto_tree_add_item(subtree, hf_a_id, tvb, 0, 1, ENC_BIG_ENDIAN);
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/* attributes */
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switch(tvb_get_guint8(tvb, 0))
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{
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default:
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{
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if(tvb_reported_length(tvb) > 1)
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proto_tree_add_item(subtree, hf_a_data, tvb, 1, -1, ENC_NA);
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break;
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}
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case CONTEXT_INFO:
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{
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for(i = 1; i<tvb_reported_length(tvb); )
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{
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switch(tvb_get_guint8(tvb, i))
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{
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default: i = tvb_reported_length(tvb); continue;
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case 1:
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case 3:
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case 7:
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{
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ti = proto_tree_add_item(subtree, hf_a_attr, tvb, i, 2, ENC_NA);
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proto_item_append_text(ti, " %d", tvb_get_guint8(tvb, i));
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i+=2; break;
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}
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case 0:
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case 4:
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{
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ti = proto_tree_add_item(subtree, hf_a_attr, tvb, i, 3, ENC_NA);
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proto_item_append_text(ti, " %d", tvb_get_guint8(tvb, i));
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i+=3; break;
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}
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case 2:
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{
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ti = proto_tree_add_item(subtree, hf_a_attr, tvb, i, 5, ENC_NA);
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proto_item_append_text(ti, " %d", tvb_get_guint8(tvb, i));
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i+=5; break;
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}
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}
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}
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break;
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}
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case BUTTON_PRESSED:
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{
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guint8 c = tvb_get_guint8(tvb, 5);
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proto_item_append_text(ti, ": %d '%c'", c, c);
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proto_tree_add_item(subtree, hf_a_data, tvb, 1, 4, ENC_NA);
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ti = proto_tree_add_item(subtree, hf_a_button_id, tvb, 5, 1, ENC_BIG_ENDIAN);
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if(ti)
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proto_item_append_text(ti, " '%c'", c);
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break;
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}
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case SET_TEXT:
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{
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if(tvb_reported_length(tvb) > 3)
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{
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proto_tree_add_item(subtree, hf_a_data, tvb, 1, 3, ENC_NA);
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proto_tree_add_item(subtree, hf_a_length, tvb, 4, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(subtree, hf_a_text, tvb, 5, -1, ENC_ASCII|ENC_NA);
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pstr = tvb_get_string_enc(wmem_packet_scope(), tvb, 5, tvb_get_guint8(tvb, 4), ENC_ASCII|ENC_NA);
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if(pstr)
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{
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proto_item_append_text(ti, ": '%s'", pstr);
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}
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}
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else
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{
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proto_tree_add_item(subtree, hf_a_data, tvb, 1, -1, ENC_NA);
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}
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break;
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}
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case DATE_TIME_INFO:
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{
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proto_tree *infotree;
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for(i=1; i<tvb_reported_length(tvb); )
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{
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switch(tvb_get_guint8(tvb, i))
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{
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default: i++; break;
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case 1:
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{
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len = 2;
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_day, tvb, i+1, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(ti, ", Day: '%d'", tvb_get_guint8(tvb, i+1));
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i += len;
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break;
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}
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case 2:
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{
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len = 2;
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_month, tvb, i+1, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(ti, ", Month: '%d'", tvb_get_guint8(tvb, i+1));
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i += len;
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break;
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}
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case 3:
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{
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len = 2;
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_weekofyear, tvb, i+1, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(ti, ", Week of the year: '%d'", tvb_get_guint8(tvb, i+1));
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i += len;
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break;
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}
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case 4:
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{
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len = tvb_get_guint8(tvb, i+1);
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len+2, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_data, tvb, i+2, len, ENC_NA);
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i += len +2;
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break;
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}
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case 5:
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{
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len = tvb_get_guint8(tvb, i+1);
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len+2, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item_ret_string(infotree, hf_a_weekday, tvb, i+2, len, ENC_ASCII|ENC_NA, wmem_packet_scope(), &pstr);
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if(pstr)
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proto_item_append_text(ti, ", Weekday: '%s'", pstr);
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i += len +2;
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break;
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}
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case 6:
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{
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len = tvb_get_guint8(tvb, i+1);
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len+2, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item_ret_string(infotree, hf_a_month_name, tvb, i+2, len, ENC_ASCII|ENC_NA, wmem_packet_scope(), &pstr);
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if(pstr)
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proto_item_append_text(ti, ", Month name: '%s'", pstr);
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i += len +2;
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break;
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}
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case 7:
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{
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len = tvb_get_guint8(tvb, i+1);
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len+2, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item_ret_string(infotree, hf_a_weekofyear_prefix, tvb, i+2, len, ENC_ASCII|ENC_NA, wmem_packet_scope(), &pstr);
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if(pstr)
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proto_item_append_text(ti, ", Week of the year prefix: '%s'", pstr);
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i += len +2;
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break;
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}
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case 8:
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{
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len = 2;
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_hour, tvb, i+1, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(ti, ", Hour: '%d'", tvb_get_guint8(tvb, i+1));
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i += len;
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break;
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}
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case 9:
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{
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len = 2;
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_minute, tvb, i+1, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(ti, ", Minute: '%d'", tvb_get_guint8(tvb, i+1));
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i += len;
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break;
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}
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case 10:
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{
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len = 2;
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ti = proto_tree_add_item(subtree, hf_a_item, tvb, i, len, ENC_NA);
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infotree = proto_item_add_subtree(ti, ett_a_item);
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proto_tree_add_item(infotree, hf_a_data, tvb, i+1, 1, ENC_NA);
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i += len;
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break;
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}
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}
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}
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break;
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}
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case DO_COMMAND:
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{
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if(tvb_reported_length(tvb) > 1)
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{
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proto_tree_add_item(subtree, hf_a_line, tvb, 1, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(subtree, hf_a_length, tvb, 2, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(subtree, hf_a_cdpn, tvb, 3, -1, ENC_ASCII|ENC_NA);
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pstr = tvb_get_string_enc(wmem_packet_scope(), tvb, 3, tvb_get_guint8(tvb, 2), ENC_ASCII|ENC_NA);
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if(pstr)
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proto_item_append_text(ti, ": '%s'", pstr);
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}
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else
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proto_item_append_text(ti, ": ???");
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break;
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}
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}
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}
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/**
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* Searching for the next command when the variable or unknown length.
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*/
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static guint searchNext(tvbuff_t *tvb, guint begin, guint end)
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{
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for(; begin < end; begin++)
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{
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if(tvb_get_guint8(tvb, begin) & 0x80)
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return begin;
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}
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return end;
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}
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/**
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* AASP-over-SIP
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*/
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static int
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dissect_aasp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti; proto_tree *aasp_tree; guint n;
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/* Check that there's enough data */
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n = tvb_reported_length(tvb);
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if(n < 3) return 0;
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col_clear(pinfo->cinfo, COL_INFO);
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col_append_str(pinfo->cinfo, COL_PROTOCOL, "/AASP");
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if(tree)
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{
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guint i, prev;
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_aasp, tvb, 0, -1, ENC_NA);
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aasp_tree = proto_item_add_subtree(ti, ett_aasp);
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/* separation of command; jump "a=" */
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if(tvb_memeql(tvb, 0, (const guint8*)"a=", 2) == 0)
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{
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prev = 2;
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for(i=2; i<n;)
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{
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switch(tvb_get_guint8(tvb, i))
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{
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#if 0
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case CONTEXT_INFO:
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{
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/* 86:02:00:02:00:23:04:00 */
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/* 86:02:00:12:00:23:04:00 */
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/* 86:02:00:3a:02:77 */
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/* 86:02:00:45:02:77 */
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/* 86:02:00:62:02:77 */
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/* 86:02:00:61:02:77 */
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/* 86:02:00:1e:02:77 */
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/* 86:02:00:00:12:77 */
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/* 86:02:00:07:12:77 */
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/* 86:02:00:00:00:01:03:02 */
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/* 86:02:00:00:01:03:02 */
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switch(tvb_get_guint8(tvb, i+2))
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{
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case 0x00: i += 11; break;
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case 0x02: i += 8; break;
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}
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break;
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}
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#endif
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default:
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i = searchNext(tvb, i+1, n);
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break;
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}
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dissect_a_binary_command(tvb_new_subset_length(tvb, prev, i-prev), pinfo, aasp_tree);
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prev = i;
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}
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}
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else
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{
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proto_tree_add_item(aasp_tree, hf_a_text, tvb, 0, -1, ENC_ASCII|ENC_NA);
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}
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}
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/* Return the amount of data this dissector was able to dissect */
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return n;
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}
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/* Register the protocol with Wireshark */
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void
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proto_register_aasp(void)
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{
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/*module_t *aasp_module;*/
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_a_data,
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{ "Data", "aasp.bin.data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
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{ &hf_a_cmd,
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{ "Bin Cmd", "aasp.a", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_id,
|
|
{ "ID", "aasp.a.id", FT_UINT8, BASE_DEC, VALS(szCmdID), 0, NULL, HFILL }},
|
|
{ &hf_a_length,
|
|
{ "Length", "aasp.bin.length", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_text,
|
|
{ "Text", "aasp.bin.text", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_line,
|
|
{ "Line", "aasp.bin.line", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_cdpn,
|
|
{ "CDPN", "aasp.bin.cdpn", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_button_id,
|
|
{ "Button ID", "aasp.bin.btnid", FT_UINT8, BASE_HEX_DEC, NULL, 0, NULL, HFILL }},
|
|
|
|
{ &hf_a_attr,
|
|
{ "Attribute", "aasp.a.attr", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
|
|
|
|
{ &hf_a_item,
|
|
{ "Info item", "aasp.bin.infoitem", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_hour,
|
|
{ "Hour", "aasp.bin.hour", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_minute,
|
|
{ "Minute", "aasp.bin.minute", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_day,
|
|
{ "Day", "aasp.bin.day", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_month,
|
|
{ "Month", "aasp.bin.month", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
|
|
{ &hf_a_weekofyear,
|
|
{ "Week of the year", "aasp.bin.weekofyear", FT_UINT8, BASE_DEC, NULL, 0,
|
|
"Week number in the year", HFILL }},
|
|
{ &hf_a_weekday,
|
|
{ "Weekday", "aasp.bin.weekday", FT_STRING, BASE_NONE, NULL, 0,
|
|
"Short weekday name in the PBX current language", HFILL }},
|
|
{ &hf_a_month_name,
|
|
{ "Month name", "aasp.bin.monthname", FT_STRING, BASE_NONE, NULL, 0,
|
|
"Short month name in the PBX current language", HFILL }},
|
|
{ &hf_a_weekofyear_prefix,
|
|
{ "Week of the year prefix", "aasp.bin.weekofyearprefix", FT_STRING, BASE_NONE, NULL, 0,
|
|
"Precedes the number on the screen which is the week number in year", HFILL }},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_aasp,
|
|
&ett_a_cmd,
|
|
&ett_a_item,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_aasp = proto_register_protocol("Aastra Signalling Protocol", "AASP", "aasp");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_aasp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register our configuration options */
|
|
/* aasp_module = prefs_register_protocol(proto_aasp, proto_reg_handoff_aasp); */
|
|
}
|
|
|
|
/* */
|
|
void
|
|
proto_reg_handoff_aasp(void)
|
|
{
|
|
dissector_handle_t aasp_handle;
|
|
aasp_handle = create_dissector_handle(dissect_aasp, proto_aasp);
|
|
dissector_add_string("media_type", "message/x-aasp-signalling", aasp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://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:
|
|
*/
|