diff options
Diffstat (limited to 'epan/dissectors/packet-megaco.c')
| -rw-r--r-- | epan/dissectors/packet-megaco.c | 3335 |
1 files changed, 3335 insertions, 0 deletions
diff --git a/epan/dissectors/packet-megaco.c b/epan/dissectors/packet-megaco.c new file mode 100644 index 0000000000..b3a64b1d2b --- /dev/null +++ b/epan/dissectors/packet-megaco.c @@ -0,0 +1,3335 @@ +/* packet-megaco.c +* Routines for megaco packet disassembly +* RFC 3015 +* +* $Id$ +* +* Christian Falckenberg, 2002/10/17 +* Copyright (c) 2002 by Christian Falckenberg +* <christian.falckenberg@nortelnetworks.com> +* +* Christoph Wiest, 2003/06/28 +* Modified 2003 by Christoph Wiest +* <ch.wiest@tesionmail.de> +* Modifyed 2004 by Anders Broman +* <anders.broman@ericsson.com> +* To handle TPKT headers if over TCP +* Modified 2005 by Karl Knoebl +* <karl.knoebl@siemens.com> +* provide info to COL_INFO and some "prettification" +* +* Copyright (c) 2006 Anders Broman <anders.broman@ericsson.com> +* +* Wireshark - Network traffic analyzer +* By Gerald Combs <gerald@wireshark.org> +* Copyright 1999 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <time.h> +#include <string.h> + +#include <glib.h> +#include <epan/packet.h> +#include <epan/emem.h> +#include <epan/addr_resolv.h> +#include <epan/prefs.h> +#include <epan/strutil.h> +#include <epan/sctpppids.h> +#include <epan/dissectors/packet-tpkt.h> +#include <epan/dissectors/packet-per.h> +#include <epan/dissectors/packet-h245.h> +#include <epan/dissectors/packet-ip.h> + +#define PORT_MEGACO_TXT 2944 +#define PORT_MEGACO_BIN 2945 + + +void proto_reg_handoff_megaco(void); + +/* Define the megaco proto */ +static int proto_megaco = -1; + +/* Define headers for megaco */ +static int hf_megaco_version = -1; +static int hf_megaco_transaction = -1; +static int hf_megaco_transid = -1; +static int hf_megaco_Context = -1; +static int hf_megaco_command_line = -1; +static int hf_megaco_command = -1; +static int hf_megaco_termid = -1; + + + +/* Define headers in subtree for megaco */ +static int hf_megaco_modem_descriptor = -1; +static int hf_megaco_multiplex_descriptor = -1; +static int hf_megaco_media_descriptor = -1; +static int hf_megaco_events_descriptor = -1; +static int hf_megaco_signal_descriptor = -1; +static int hf_megaco_audit_descriptor = -1; +static int hf_megaco_servicechange_descriptor = -1; +static int hf_megaco_digitmap_descriptor = -1; +static int hf_megaco_statistics_descriptor = -1; +static int hf_megaco_observedevents_descriptor = -1; +static int hf_megaco_topology_descriptor = -1; +static int hf_megaco_error_descriptor = -1; +static int hf_megaco_TerminationState_descriptor= -1; +static int hf_megaco_Remote_descriptor = -1; +static int hf_megaco_Local_descriptor = -1; +static int hf_megaco_LocalControl_descriptor = -1; +static int hf_megaco_packages_descriptor = -1; +static int hf_megaco_error_Frame = -1; +static int hf_megaco_Service_State = -1; +static int hf_megaco_Event_Buffer_Control = -1; +static int hf_megaco_mode = -1; +static int hf_megaco_reserve_group = -1; +static int hf_megaco_h324_muxtbl_in = -1; +static int hf_megaco_h324_muxtbl_out = -1; +static int hf_megaco_ds_dscp = -1; +static int hf_megaco_h324_h223capr = -1; +static int hf_megaco_reserve_value = -1; +static int hf_megaco_streamid = -1; +static int hf_megaco_requestid = -1; +static int hf_megaco_pkgdname = -1; +static int hf_megaco_mId = -1; +static int hf_megaco_h245 = -1; +static int hf_megaco_h223Capability = -1; + +/* Define the trees for megaco */ +static int ett_megaco = -1; +static int ett_megaco_message = -1; +static int ett_megaco_message_body = -1; +static int ett_megaco_context = -1; +static int ett_megaco_command_line = -1; +static int ett_megaco_mediadescriptor = -1; +static int ett_megaco_descriptors = -1; +static int ett_megaco_TerminationState = -1; +static int ett_megaco_Localdescriptor = -1; +static int ett_megaco_Remotedescriptor = -1; +static int ett_megaco_LocalControldescriptor = -1; +static int ett_megaco_auditdescriptor = -1; +static int ett_megaco_eventsdescriptor = -1; +static int ett_megaco_observedeventsdescriptor = -1; +static int ett_megaco_observedevent = -1; +static int ett_megaco_packagesdescriptor = -1; +static int ett_megaco_requestedevent = -1; +static int ett_megaco_signalsdescriptor = -1; +static int ett_megaco_requestedsignal = -1; +static int ett_megaco_h245 = -1; + +static dissector_handle_t megaco_text_handle; + + +/* +* Here are the global variables associated with +* the various user definable characteristics of the dissection +* +* MEGACO has two kinds of message formats: text and binary +* +* global_megaco_raw_text determines whether we are going to display +* the raw text of the megaco message, much like the HTTP dissector does. +* +* global_megaco_dissect_tree determines whether we are going to display +* a detailed tree that expresses a somewhat more semantically meaningful +* decode. +*/ +static guint global_megaco_txt_tcp_port = PORT_MEGACO_TXT; +static guint global_megaco_txt_udp_port = PORT_MEGACO_TXT; +#if 0 +static int global_megaco_bin_tcp_port = PORT_MEGACO_BIN; +static int global_megaco_bin_udp_port = PORT_MEGACO_BIN; +#endif +static gboolean global_megaco_raw_text = TRUE; +static gboolean global_megaco_dissect_tree = TRUE; + +/* +* Variables to allow for proper deletion of dissector registration when +* the user changes port from the gui. +*/ +static int txt_tcp_port = 0; +static int txt_udp_port = 0; +#if 0 +static int bin_tcp_port = 0; +static int bin_udp_port = 0; +#endif + +/* Some basic utility functions that are specific to this dissector */ +static gint tvb_skip_wsp(tvbuff_t* tvb, gint offset); +static gint tvb_skip_wsp_return(tvbuff_t* tvb, gint offset); +/* +* The various functions that either dissect some +* subpart of MEGACO. These aren't really proto dissectors but they +* are written in the same style. +* +*/ +static void +dissect_megaco_descriptors(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint tvb_descriptors_start_offset, gint tvb_descriptors_end_offset); +static void +dissect_megaco_modemdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_multiplexdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_mediadescriptor(tvbuff_t *tvb, proto_tree *tree,packet_info *pinfo, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_eventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_signaldescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_auditdescriptor(tvbuff_t *tvb, proto_tree *tree,packet_info *pinfo, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_servicechangedescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_digitmapdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_statisticsdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_observedeventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_topologydescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_errordescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset); +static void +dissect_megaco_TerminationStatedescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_next_offset, gint tvb_current_offset); +static void +dissect_megaco_Localdescriptor(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset); +static void +dissect_megaco_LocalControldescriptor(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset); +static void +dissect_megaco_Packagesdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_next_offset, gint tvb_current_offset); +static void +tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree); +static void +dissect_megaco_text(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static dissector_handle_t sdp_handle; +static dissector_handle_t h245_handle; +static dissector_handle_t h248_handle; + +static proto_tree *top_tree; +/* + * dissect_megaco_text over TCP, there will be a TPKT header there + * + */ +static void dissect_megaco_text_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + int lv_tpkt_len; + + /* This code is copied from the Q.931 dissector, some parts skipped. + * Check whether this looks like a TPKT-encapsulated + * MEGACO packet. + * + * The minimum length of a MEGACO message is 6?: + * Re-assembly ? + */ + lv_tpkt_len = is_tpkt(tvb, 6); + if (lv_tpkt_len == -1) { + /* + * It's not a TPKT packet; + * Is in MEGACO ? + */ + dissect_megaco_text(tvb, pinfo, tree); + } + dissect_tpkt_encap(tvb, pinfo, tree, TRUE, + megaco_text_handle); +} + +#define ERRORTOKEN 1 +#define TRANSTOKEN 2 +#define REPLYTOKEN 3 +#define PENDINGTOKEN 4 +#define RESPONSEACKTOKEN 5 + +typedef struct { + const char *name; + const char *compact_name; +} megaco_tokens_t; + +static const megaco_tokens_t megaco_messageBody_names[] = { + { "Unknown-token", NULL }, /* 0 Pad so that the real headers start at index 1 */ + { "Error", "ER" }, /* 1 */ + { "Transaction", "T" }, /* 2 */ + { "Reply", "P" }, /* 3 */ + { "Pending", "PN" }, /* 4 */ + { "TransactionResponseAck", "K" }, /* 5 */ +}; + +/* Returns index of megaco_tokens_t */ +static gint find_megaco_messageBody_names(tvbuff_t *tvb, int offset, guint header_len) +{ + guint i; + + for (i = 1; i < array_length(megaco_messageBody_names); i++) { + if (header_len == strlen(megaco_messageBody_names[i].name) && + tvb_strncaseeql(tvb, offset, megaco_messageBody_names[i].name, header_len) == 0) + return i; + if (megaco_messageBody_names[i].compact_name != NULL && + header_len == strlen(megaco_messageBody_names[i].compact_name) && + tvb_strncaseeql(tvb, offset, megaco_messageBody_names[i].compact_name, header_len) == 0) + return i; + } + + return -1; +} + +/* + * dissect_megaco_text - The dissector for the MEGACO Protocol, using + * text encoding. + */ +static void +dissect_megaco_text(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + gint tvb_len, len; + gint tvb_offset,tvb_current_offset,tvb_previous_offset,tvb_next_offset,tokenlen; + gint line_start_offset, ver_offset, ver_length, mId_offset, mId_length; + gint tvb_command_start_offset, tvb_command_end_offset; + gint tvb_descriptors_start_offset, tvb_descriptors_end_offset; + proto_tree *megaco_tree, *message_tree, *message_body_tree, *megaco_context_tree, *megaco_tree_command_line, *ti, *sub_ti; + proto_item* (*my_proto_tree_add_string)(proto_tree*, int, tvbuff_t*, gint, gint, const char*); + + guint8 word[7]; + guint8 TermID[30]; + guint8 tempchar; + gint tvb_RBRKT, tvb_LBRKT, RBRKT_counter, LBRKT_counter; + guint token_index=0; + + top_tree=tree; + /* Initialize variables */ + tvb_len = tvb_length(tvb); + megaco_tree = NULL; + ti = NULL; + tvb_previous_offset = 0; + tvb_current_offset = 0; + tvb_offset = 0; + tvb_next_offset = 0; + tvb_command_start_offset = 0; + tvb_command_end_offset = 0; + tvb_RBRKT = 0; + tvb_LBRKT = 0; + RBRKT_counter = 0; + LBRKT_counter = 0; + + + /* + * Check to see whether we're really dealing with MEGACO by looking + * for the "MEGACO" string or a "!".This needs to be improved when supporting + * binary encodings. Bugfix add skipping of leading spaces. + */ + tvb_offset = tvb_skip_wsp(tvb, tvb_offset); + line_start_offset = tvb_offset; + /* Quick fix for MEGACO not following the RFC, hopfully not breaking any thing + * Turned out to be TPKT in case of TCP, added some code to handle that. + * + * tvb_offset = tvb_find_guint8(tvb, tvb_offset, 5, 'M'); + */ + if(!tvb_get_nstringz0(tvb,tvb_offset,sizeof(word),word)) return; + if (strncasecmp((gchar*)word, "MEGACO", 6) != 0 && (gchar)tvb_get_guint8(tvb, tvb_offset ) != '!'){ + call_dissector(h248_handle,tvb,pinfo,tree); + return; + } + + + /* Display MEGACO in protocol column */ + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_add_str(pinfo->cinfo, COL_PROTOCOL, "MEGACO"); + + /* Build the info tree if we've been given a root */ + /* Create megaco subtree */ + ti = proto_tree_add_item(tree,proto_megaco,tvb, 0, -1, FALSE); + megaco_tree = proto_item_add_subtree(ti, ett_megaco); + + if(global_megaco_dissect_tree) + my_proto_tree_add_string = proto_tree_add_string; + else + my_proto_tree_add_string = proto_tree_add_string_hidden; + + /* Format of 'message' is = MegacopToken SLASH Version SEP mId SEP messageBody */ + /* MegacopToken = "MEGACO" or "!" */ + /* According to H248.1-200205 Annex B Text encoding ( protocol version 2 ) */ + + /* Find version */ + tvb_previous_offset = tvb_find_guint8(tvb, 0, + tvb_len, '/'); + if (tvb_previous_offset == -1) { + proto_tree_add_text(megaco_tree, tvb, 0, -1, + "Sorry, no \"/\" in the MEGACO header, I can't parse this packet"); + return; + } + tvb_previous_offset = tvb_previous_offset + 1; + /* As version should follow /, just add 1, works till ver 9 */ + tvb_current_offset = tvb_previous_offset + 1; + + + tokenlen = tvb_current_offset - tvb_previous_offset; + ver_offset = tvb_previous_offset; + ver_length = tokenlen; + + /* Pos of version + 2 should take us past version + SEP */ + + tvb_previous_offset = tvb_previous_offset + 2; + /* in case of CRLF */ + if (tvb_get_guint8(tvb, tvb_current_offset ) == '\n') + tvb_previous_offset++; + if (tvb_get_guint8(tvb, tvb_current_offset ) == '\r') + tvb_previous_offset++; + + /* mId should follow here, + * mId = (( domainAddress / domainName ) [":" portNumber]) / mtpAddress / deviceName + * domainAddress = "[" (IPv4address / IPv6address) "]" + * domainName = "<" (ALPHA / DIGIT) *63(ALPHA / DIGIT / "-" /".") ">" + * mtpAddress = MTPToken LBRKT 4*8 (HEXDIG) RBRKT + * MTPToken = ("MTP") + * deviceName = pathNAME + * pathNAME = ["*"] NAME *("/" / "*"/ ALPHA / DIGIT /"_" / "$" )["@" pathDomainName ] + */ + + tokenlen = tvb_find_line_end( tvb, tvb_previous_offset, -1, &tvb_next_offset, FALSE); + /* accept white spaces as SEParator too */ + if ( (tvb_current_offset=tvb_find_guint8(tvb, tvb_previous_offset, tokenlen, ' ')) != -1 ) { + /* SEP after mID might be spaces only */ + tokenlen = tvb_current_offset-tvb_previous_offset; + tvb_next_offset = tvb_skip_wsp(tvb, tvb_current_offset); + } + + /* Att this point we should point to the "\n" ending the mId element + * or to the next character after white space SEP + */ + mId_offset = tvb_previous_offset; + mId_length = tokenlen; + + /* Add the first line to the tree */ + tokenlen = tvb_next_offset - line_start_offset; + ti = proto_tree_add_text(megaco_tree, tvb, line_start_offset, tokenlen, + "%s",tvb_format_text(tvb,line_start_offset,tokenlen)); + message_tree = proto_item_add_subtree(ti, ett_megaco_message); + if (tree){ + if(global_megaco_dissect_tree){ + proto_tree_add_item(message_tree, hf_megaco_version,tvb, ver_offset, ver_length, FALSE); + proto_tree_add_item(message_tree, hf_megaco_mId,tvb, mId_offset, mId_length, FALSE); + }else{ + proto_tree_add_item_hidden(message_tree, hf_megaco_version,tvb, ver_offset, ver_length, FALSE); + proto_tree_add_item_hidden(message_tree, hf_megaco_mId,tvb, mId_offset, mId_length, FALSE); + } + } + + tvb_previous_offset = tvb_next_offset; + +/* Next part is + * : messageBody = ( errorDescriptor / transactionList ) + * errorDescriptor = ErrorToken EQUAL ErrorCode LBRKT [quotedString] RBRKT + * ErrorToken = ("Error" / "ER") + * + * transactionList = 1*( transactionRequest / transactionReply / + * transactionPending / transactionResponseAck ) + * + * transactionResponseAck = ResponseAckToken LBRKT + * transactionAck*(COMMA transactionAck) RBRKT + * ResponseAckToken = ("TransactionResponseAck"/ "K") + * + * transactionPending = PendingToken EQUAL TransactionID LBRKT RBRKT + * PendingToken = ("Pending" / "PN") + * + * transactionReply = ReplyToken EQUAL TransactionID LBRKT + * [ ImmAckRequiredToken COMMA]( errorDescriptor / actionReplyList ) RBRKT + * ReplyToken = ("Reply" / "P") + * + * transactionRequest = TransToken EQUAL TransactionID LBRKT + * actionRequest *(COMMA actionRequest) RBRKT + * TransToken = ("Transaction" / "T") + */ + tempchar = tvb_get_guint8(tvb, tvb_previous_offset); + + /* Find token length */ + for (tvb_offset=tvb_previous_offset; tvb_offset < tvb_len-1; tvb_offset++){ + if (!isalpha(tvb_get_guint8(tvb, tvb_offset ))){ + break; + } + } + tokenlen = tvb_offset - tvb_previous_offset; + token_index = find_megaco_messageBody_names(tvb, tvb_previous_offset, tokenlen); + /* Debug code + g_warning("token_index %u",token_index); + */ + + switch ( token_index ){ + /* errorDescriptor */ + case ERRORTOKEN: + if (check_col(pinfo->cinfo, COL_INFO) ) + col_add_fstr(pinfo->cinfo, COL_INFO, "Error "); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_offset+1, tvb_len, '}'); + + ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset, + "%s",tvb_format_text(tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset+1)); + message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body); + + if (tree) { + my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb, + tvb_previous_offset, tokenlen, + "Error" ); + + tvb_command_start_offset = tvb_previous_offset; + dissect_megaco_errordescriptor(tvb, megaco_tree, tvb_len-1, tvb_command_start_offset); + } + return; + break; + /* transactionResponseAck + * transactionResponseAck = ResponseAckToken LBRKT transactionAck + * *(COMMA transactionAck) RBRKT + * transactionAck = transactionID / (transactionID "-" transactionID) + */ + case RESPONSEACKTOKEN: + tvb_LBRKT = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{'); + tvb_offset = tvb_LBRKT; + ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_offset-tvb_previous_offset, + "%s",tvb_format_text(tvb, tvb_previous_offset, tvb_offset-tvb_previous_offset+1)); + message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body); + + my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb, + tvb_previous_offset, tokenlen, + "TransactionResponseAck" ); + + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_offset+1); + tvb_current_offset = tvb_find_guint8(tvb, tvb_offset+1, tvb_len, '}'); + tvb_current_offset = tvb_skip_wsp_return(tvb, tvb_current_offset)-1; /* cut last RBRKT */ + len = tvb_current_offset - tvb_previous_offset; + + if (check_col(pinfo->cinfo, COL_INFO) ) + col_add_fstr(pinfo->cinfo, COL_INFO, "%s TransactionResponseAck", + tvb_format_text(tvb,tvb_previous_offset,len)); + if(tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb, + tvb_previous_offset, len, + tvb_format_text(tvb,tvb_previous_offset,len)); + if(global_megaco_raw_text){ + tvb_raw_text_add(tvb, megaco_tree); + } + tvb_previous_offset = tvb_LBRKT +1; + return; + break; + /* Pe and PN is transactionPending, P+"any char" is transactionReply */ + case PENDINGTOKEN: + + tvb_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_len, '=')+1; + tvb_offset = tvb_skip_wsp(tvb, tvb_offset); + tvb_LBRKT = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{'); + tvb_current_offset = tvb_LBRKT; + ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset, + "%s",tvb_format_text(tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset+1)); + message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body); + + tvb_current_offset = tvb_skip_wsp_return(tvb, tvb_current_offset-1); + len = tvb_current_offset - tvb_offset; + if (tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb, + tvb_previous_offset, tokenlen, + "Pending" ); + + if (check_col(pinfo->cinfo, COL_INFO) ) + col_add_fstr(pinfo->cinfo, COL_INFO, "%s Pending", + tvb_format_text(tvb,tvb_offset,len)); + + if(tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb, + tvb_offset, len, + tvb_format_text(tvb,tvb_offset,len)); + return; + break; + + /* transactionReply */ + case REPLYTOKEN: + tvb_LBRKT = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{'); + ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_LBRKT-tvb_previous_offset, + "%s",tvb_format_text(tvb, tvb_previous_offset, tvb_LBRKT-tvb_previous_offset+1)); + message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body); + + if (tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb, + tvb_previous_offset, tokenlen, + "Reply" ); + + tvb_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_len, '=')+1; + tvb_offset = tvb_skip_wsp(tvb, tvb_offset); + tvb_current_offset = tvb_skip_wsp_return(tvb, tvb_LBRKT-1); + len = tvb_current_offset - tvb_offset; + + if (check_col(pinfo->cinfo, COL_INFO) ) + col_add_fstr(pinfo->cinfo, COL_INFO, "%s Reply ", + tvb_format_text(tvb,tvb_offset,len)); + if(tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb, + tvb_offset, len, tvb_format_text(tvb,tvb_offset,len)); + + /* Find if we have a errorDescriptor or actionReplyList */ + tvb_offset = tvb_skip_wsp(tvb, tvb_LBRKT+1); + tempchar = tvb_get_guint8(tvb,tvb_offset); + if ((tempchar == 'E')||(tempchar == 'e')){ + dissect_megaco_errordescriptor(tvb, megaco_tree, tvb_len-1, tvb_offset); + return; + } + /* Offset should be at first printarable char after { */ + tvb_previous_offset = tvb_offset; + break; + case TRANSTOKEN: + /* TransactionRequest */ + tvb_LBRKT = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{'); + tvb_current_offset = tvb_LBRKT; + ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset, + "%s",tvb_format_text(tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset+1)); + message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body); + + if(tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb, + tvb_previous_offset, tokenlen, + "Request" ); + tvb_offset = tvb_find_guint8(tvb, tvb_offset, tvb_len, '=')+1; + tvb_offset = tvb_skip_wsp(tvb, tvb_offset); + tvb_current_offset = tvb_skip_wsp_return(tvb, tvb_current_offset-1); + len = tvb_current_offset - tvb_offset; + if (check_col(pinfo->cinfo, COL_INFO) ) + col_add_fstr(pinfo->cinfo, COL_INFO, "%s Request", + tvb_format_text(tvb,tvb_offset,len)); + if(tree) + my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb, tvb_offset,len, + tvb_format_text(tvb,tvb_offset,len)); + /* Offset should be at first printarable char after { */ + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_LBRKT+1); + + break; + default : + ti = proto_tree_add_item(tree,proto_megaco,tvb, 0, -1, FALSE); + megaco_tree = proto_item_add_subtree(ti, ett_megaco); + proto_tree_add_text(megaco_tree, tvb, 0, -1, + "Sorry, can't understand errorDescriptor / transactionList = %s, can't parse it pos %u", + tvb_format_text(tvb,tvb_previous_offset,2),tvb_previous_offset); + return; + break; + } /* end switch */ +/* Only these remains now + * transactionReply = ReplyToken EQUAL TransactionID LBRKT + * [ ImmAckRequiredToken COMMA]( errorDescriptor / actionReplyList ) RBRKT + * ReplyToken = ("Reply" / "P") + * + * errorDescriptor = ErrorToken EQUAL ErrorCode + * LBRKT [quotedString] RBRKT + * + * transactionRequest = TransToken EQUAL TransactionID LBRKT + * actionRequest *(COMMA actionRequest) RBRKT + * TransToken = ("Transaction" / "T") + */ + + /* Find Context */ +nextcontext: + + tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_len, '{'); + ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_next_offset-tvb_previous_offset+1, + "%s", tvb_format_text(tvb, tvb_previous_offset, tvb_next_offset-tvb_previous_offset+1)); + megaco_context_tree = proto_item_add_subtree(ti, ett_megaco_context); + + tvb_previous_offset = tvb_find_guint8(tvb, tvb_current_offset, + tvb_len, '=')+1; + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_previous_offset); + if (tvb_current_offset >= tvb_next_offset) { + proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Invalid offset ]"); + return; + } + tvb_current_offset = tvb_next_offset; + + + tokenlen = tvb_current_offset - tvb_previous_offset; + tempchar = tvb_get_guint8(tvb, tvb_previous_offset ); + + if (tvb_get_guint8(tvb, tvb_current_offset-1 ) == ' '){ + tokenlen--; + } + + switch ( tempchar ){ + case '$': + my_proto_tree_add_string(megaco_context_tree, hf_megaco_Context, tvb, + tvb_previous_offset, 1, + "Choose one"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " |=Choose one"); + break; + case '*': + my_proto_tree_add_string(megaco_context_tree, hf_megaco_Context, tvb, + tvb_previous_offset, 1, + "All"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " |=All"); + break; + case '-': + proto_tree_add_text(megaco_context_tree, tvb, tvb_previous_offset, tokenlen, "Context: NULL" ); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " |=NULL"); + break; + default: + my_proto_tree_add_string(megaco_context_tree, hf_megaco_Context, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " |=%s",tvb_format_text(tvb, tvb_previous_offset,tokenlen)); + } + + /* Find Commands */ + + /* If Transaction is is Request, Reply or Pending */ + tvb_command_start_offset = tvb_skip_wsp(tvb, tvb_current_offset +1); + tvb_command_end_offset = tvb_command_start_offset; + + tvb_LBRKT = tvb_command_start_offset; + tvb_RBRKT = tvb_command_start_offset; + + /* The following loop find the individual contexts, commands and call the for every Descriptor a subroutine */ + + do { + tvb_command_end_offset = tvb_find_guint8(tvb, tvb_command_end_offset +1, + tvb_len, ','); + + if ( tvb_command_end_offset == -1 ){ + tvb_command_end_offset = tvb_len; + + } + + /* checking how many left brackets are before the next comma */ + + while ( tvb_find_guint8(tvb, tvb_LBRKT+1,tvb_len, '{') != -1 + && (tvb_find_guint8(tvb, tvb_LBRKT+1,tvb_len, '{') < tvb_command_end_offset)){ + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1, + tvb_len, '{'); + + LBRKT_counter++; + } + + /* checking how many right brackets are before the next comma */ + + while ( (tvb_find_guint8(tvb, tvb_RBRKT+1,tvb_len, '}') != -1 ) + && (tvb_find_guint8(tvb, tvb_RBRKT+1,tvb_len, '}') < tvb_command_end_offset) + && LBRKT_counter != 0){ + + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_len, '}'); + RBRKT_counter++; + + + } + + /* If equal or more right brackets before the comma, one command is complete */ + + if ( LBRKT_counter <= RBRKT_counter ){ + + tvb_current_offset = tvb_find_guint8(tvb, tvb_command_start_offset, + tvb_len, '{'); + + + /* includes no descriptors */ + + if ( LBRKT_counter == 0 ){ + + tvb_current_offset = tvb_command_end_offset; + + /* the last command in a context */ + + if ( tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '}') < tvb_current_offset + && tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '}') != -1){ + + tvb_previous_offset = tvb_find_guint8(tvb, tvb_command_start_offset, + tvb_len, '}'); + + len = tvb_previous_offset - tvb_command_start_offset; + + tvb_previous_offset = tvb_skip_wsp_return(tvb, tvb_previous_offset -1); + + tokenlen = tvb_previous_offset - tvb_command_start_offset; + + } + + /* not the last command in a context*/ + + else{ + len = tvb_current_offset - tvb_command_start_offset; + tvb_current_offset = tvb_skip_wsp_return(tvb, tvb_current_offset -1); + + tokenlen = tvb_current_offset - tvb_command_start_offset; + } + } + + /* command includes descriptors */ + + else{ + len = tvb_current_offset - tvb_command_start_offset; + tvb_current_offset = tvb_skip_wsp_return(tvb, tvb_current_offset -1); + + tokenlen = tvb_current_offset - tvb_command_start_offset; + } + + /* if a next context is specified */ + + if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'C'){ + tvb_current_offset = tvb_command_start_offset; + tvb_previous_offset = tvb_command_start_offset; + LBRKT_counter = 0; + RBRKT_counter = 0; + goto nextcontext; + } + + sub_ti = proto_tree_add_text(megaco_tree, tvb, tvb_command_start_offset, len+1, + "%s", tvb_format_text(tvb, tvb_command_start_offset, len+1)); + megaco_tree_command_line = proto_item_add_subtree(sub_ti, ett_megaco_command_line); + /* creation of the megaco_tree_command_line additionally Command and Transaction ID will be printed in this line */ + /* Changed to use the lines above. this code is saved if there is complaints + sub_ti = proto_tree_add_item(megaco_tree,hf_megaco_command_line,tvb,tvb_command_start_offset,tokenlen, FALSE); + megaco_tree_command_line = proto_item_add_subtree(sub_ti, ett_megaco_command_line); + */ + + tvb_next_offset = tvb_command_start_offset + tokenlen; + + /* Additional value */ + + if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'O'){ + + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_command_start_offset, 2, "O- indicates an optional command" ); + tvb_command_start_offset = tvb_command_start_offset+2; + + } + + /* Additional value */ + + if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'W'){ + + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_command_start_offset, 2, "W- indicates a wildcarded response to a command" ); + tvb_command_start_offset = tvb_command_start_offset+2; + + } + + + + tvb_offset = tvb_find_guint8(tvb, tvb_command_start_offset, + tvb_len, '='); + tvb_offset = tvb_skip_wsp_return(tvb, tvb_offset -1); + tokenlen = tvb_offset - tvb_command_start_offset; + + tempchar = tvb_get_guint8(tvb, tvb_command_start_offset); + if ( (tempchar >= 'a')&& (tempchar <= 'z')) + tempchar = tempchar - 0x20; + + if ( tempchar != 'E' ){ + + if ( tvb_get_guint8(tvb, 0 ) == '!'){ + + switch ( tempchar ){ + + case 'A': + + tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1); + + switch ( tempchar ){ + + case 'V': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "AuditValue"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " AuditValue"); + break; + + case 'C': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "AuditCapability"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " AuditCapability"); + break; + + default: + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Add"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " Add"); + break; + } + break; + + case 'N': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Notify"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " Notify"); + break; + + case 'M': + + tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1); + + switch ( tempchar ){ + case 'F': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Modify"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " Modify"); + break; + + case 'V': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Move"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " Move"); + break; + } + break; + + case 'P': + /* + PackagesToken = ("Packages" / "PG") + PendingToken = ("Pending" / "PN") + PriorityToken = ("Priority" / "PR") + ProfileToken = ("Profile" / "PF") + */ + tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1); + + switch ( tempchar ){ + case 'G': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Packages"); + break; + case 'N': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Pending"); + break; + case 'R': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Priority"); + break; + case 'F': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Profile"); + break; + } + break; + + case 'S': + tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1); + + switch ( tempchar ){ + + case 'C': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "ServiceChange"); + break; + + default: + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + "Subtract"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " Subtract"); + break; + } + break; + + default: + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + tvb_ensure_bytes_exist(tvb, tvb_previous_offset, tokenlen); + proto_tree_add_string(megaco_tree, hf_megaco_error_Frame, tvb, + tvb_previous_offset, tokenlen, + "No Command detectable !"); + return; + + break; + } + } + else{ + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb, + tvb_command_start_offset, tokenlen, + tvb_format_text(tvb, tvb_command_start_offset, + tokenlen)); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " %s",tvb_format_text(tvb, tvb_command_start_offset,tokenlen)); + } + + + tvb_offset = tvb_find_guint8(tvb, tvb_command_start_offset, + tvb_len, '='); + tvb_offset = tvb_skip_wsp(tvb, tvb_offset+1); + tokenlen = tvb_next_offset - tvb_offset; + + tempchar = tvb_get_guint8(tvb, tvb_offset); + + switch ( tempchar ){ + + case 'E': + if ((tokenlen+1 > (int) sizeof(TermID)) || (tokenlen+1 <= 0)) { + proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Invalid TermID length (%d) ]", tokenlen+1); + return; + } + tvb_get_nstringz0(tvb,tvb_offset,tokenlen+1,TermID); + TermID[0] = 'e'; + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb, + tvb_offset, tokenlen, + (gchar*)TermID); + break; + + case '*': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb, + tvb_offset, tokenlen, + "WildCard all"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, "=*"); + break; + + case '$': + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb, + tvb_offset, tokenlen, + "WildCard any"); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, "=$"); + break; + + default: + my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb, + tvb_offset, tokenlen, + tvb_format_text(tvb, tvb_offset, + tokenlen)); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, "=%s",tvb_format_text(tvb, tvb_offset,tokenlen)); + break; + } + + } + /* Dissect the Descriptors */ + + + if ( LBRKT_counter != 0 && tvb_current_offset != tvb_command_end_offset){ + + tvb_descriptors_start_offset = tvb_find_guint8(tvb, tvb_command_start_offset, + tvb_len, '{'); + + tvb_descriptors_end_offset = tvb_descriptors_start_offset; + + + while ( LBRKT_counter > 0 ){ + + tvb_descriptors_end_offset = tvb_find_guint8(tvb, tvb_descriptors_end_offset+1, + tvb_len, '}'); + + LBRKT_counter--; + + } + + tempchar = tvb_get_guint8(tvb, tvb_command_start_offset); + + if ( tempchar == 'E'){ + dissect_megaco_descriptors(tvb, megaco_tree, pinfo, tvb_command_start_offset-1,tvb_descriptors_end_offset); + } + else { + dissect_megaco_descriptors(tvb, megaco_tree, pinfo, tvb_descriptors_start_offset,tvb_descriptors_end_offset); + } + } + RBRKT_counter = 0; + LBRKT_counter = 0; + tvb_command_start_offset = tvb_skip_wsp(tvb, tvb_command_end_offset +1); + tvb_LBRKT = tvb_command_start_offset; + tvb_RBRKT = tvb_command_start_offset; + + } + } while ( tvb_command_end_offset < tvb_len ); + + if(global_megaco_raw_text){ + tvb_raw_text_add(tvb, megaco_tree); + } +} + +#define MEGACO_MODEM_TOKEN 1 +#define MEGACO_MUX_TOKEN 2 +#define MEGACO_MEDIA_TOKEN 3 +#define MEGACO_SIGNALS_TOKEN 4 +#define MEGACO_SERVICES_TOKEN 5 +#define MEGACO_STATS_TOKEN 6 +#define MEGACO_ERROR_TOKEN 7 +#define MEGACO_EVENTS_TOKEN 8 +#define MEGACO_AUDIT_TOKEN 9 +#define MEGACO_DIGITMAP_TOKEN 10 +#define MEGACO_OE_TOKEN 11 +#define MEGACO_TOPOLOGY_TOKEN 12 +#define MEGACO_PACKAGES_TOKEN 13 + +static const megaco_tokens_t megaco_descriptors_names[] = { + { "Unknown-token", NULL }, /* 0 Pad so that the real headers start at index 1 */ + { "Modem", "MD" }, /* 1 */ + { "Mux", "MX" }, /* 2 */ + { "Media", "M" }, /* 3 */ + { "Signals", "SG" }, /* 4 */ + { "Services", "SV" }, /* 5 */ + { "Statistics", "SA" }, /* 6 */ + { "Error", "ER" }, /* 7 */ + { "Events", "E" }, /* 8 */ + { "Audit", "AT" }, /* 9 */ + { "DigitMap", "DM" }, /* 10 */ + { "ObservedEvents", "OE" }, /* 11 */ + { "Topology", "TP" }, /* 12 */ + { "Packages", "PG" }, /* 13 */ +}; + +/* Returns index of megaco_tokens_t */ +static gint find_megaco_descriptors_names(tvbuff_t *tvb, int offset, guint header_len) +{ + guint i; + + for (i = 1; i < array_length(megaco_descriptors_names); i++) { + if (header_len == strlen(megaco_descriptors_names[i].name) && + tvb_strncaseeql(tvb, offset, megaco_descriptors_names[i].name, header_len) == 0) + return i; + if (megaco_descriptors_names[i].compact_name != NULL && + header_len == strlen(megaco_descriptors_names[i].compact_name) && + tvb_strncaseeql(tvb, offset, megaco_descriptors_names[i].compact_name, header_len) == 0) + return i; + } + + return -1; +} + +static void +dissect_megaco_descriptors(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, packet_info *pinfo, gint tvb_descriptors_start_offset, gint tvb_descriptors_end_offset) +{ + gint tvb_len, len, token_index, tvb_offset, temp_offset; + gint tvb_current_offset,tvb_previous_offset,tokenlen; + gint tvb_RBRKT, tvb_LBRKT, RBRKT_counter, LBRKT_counter; + tvb_len = tvb_length(tvb); + + + len = 0; + tvb_RBRKT = 0; + tvb_LBRKT = 0; + RBRKT_counter = 0; + LBRKT_counter = 0; + + + tvb_LBRKT = tvb_skip_wsp(tvb, tvb_descriptors_start_offset +1); + + tvb_previous_offset = tvb_LBRKT; + tvb_RBRKT = tvb_descriptors_start_offset; + + + do { + + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_len, '}'); + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT, + tvb_len, '{'); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, + tvb_len, ','); + + if (tvb_current_offset == -1 ){ + tvb_current_offset = tvb_descriptors_end_offset; + + } + if (tvb_current_offset <= tvb_previous_offset) { + proto_tree_add_text(megaco_tree_command_line, tvb, 0, 0, "[ Parse error: Invalid offset ]"); + return; + } + + + + /* Descriptor includes no parameters */ + + if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){ + + if ( tvb_current_offset > tvb_RBRKT ){ + tvb_current_offset = tvb_RBRKT; + } + + tvb_RBRKT = tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1; + } + + /* Descriptor includes Parameters */ + if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){ + + while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){ + + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1, + tvb_len, '{'); + if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1) + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,tvb_len, '}'); + } + + } + + /* Find token length */ + for (tvb_offset=tvb_previous_offset; tvb_offset < tvb_len-1; tvb_offset++){ + if (!isalpha(tvb_get_guint8(tvb, tvb_offset ))){ + break; + } + } + tokenlen = tvb_offset - tvb_previous_offset; + token_index = find_megaco_descriptors_names(tvb, tvb_previous_offset, tokenlen); + switch ( token_index ){ + case MEGACO_MODEM_TOKEN: + dissect_megaco_modemdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_MUX_TOKEN: + dissect_megaco_multiplexdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_MEDIA_TOKEN: + /*TODO: Move tis to the top when all branches fixed !!!*/ + temp_offset = tvb_find_guint8(tvb, tvb_previous_offset,tvb_len, '{'); + tokenlen = temp_offset - tvb_previous_offset+1; + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + + tvb_previous_offset = tvb_skip_wsp(tvb, temp_offset +1); + dissect_megaco_mediadescriptor(tvb, megaco_tree_command_line, pinfo, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_SIGNALS_TOKEN: + dissect_megaco_signaldescriptor(tvb, pinfo, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_SERVICES_TOKEN: + dissect_megaco_servicechangedescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_STATS_TOKEN: + dissect_megaco_statisticsdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_ERROR_TOKEN: + dissect_megaco_errordescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_EVENTS_TOKEN: + dissect_megaco_eventsdescriptor(tvb, pinfo, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_AUDIT_TOKEN: + dissect_megaco_auditdescriptor(tvb, megaco_tree_command_line, pinfo, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_DIGITMAP_TOKEN: + dissect_megaco_digitmapdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_OE_TOKEN: + /* ObservedEventsToken */ + dissect_megaco_observedeventsdescriptor(tvb, pinfo, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_TOPOLOGY_TOKEN: + dissect_megaco_topologydescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + case MEGACO_PACKAGES_TOKEN: + dissect_megaco_Packagesdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset); + break; + default: + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_error_Frame, tvb, + tvb_previous_offset, tokenlen, + "No Descriptor detectable !"); + break; + } + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + + tvb_current_offset = tvb_find_guint8(tvb, tvb_RBRKT, tvb_len, ','); + if (tvb_current_offset == -1 ){ + tvb_current_offset = tvb_descriptors_end_offset; + } + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_current_offset+1); + tvb_LBRKT = tvb_previous_offset; + tvb_RBRKT = tvb_previous_offset; + +}while ( tvb_current_offset < tvb_descriptors_end_offset ); + +} + +static void +dissect_megaco_modemdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen; + + tokenlen = 0; + + + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_modem_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + +} +static void +dissect_megaco_multiplexdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen; + + tokenlen = 0; + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_multiplex_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + +} + +/* mediaDescriptor = MediaToken LBRKT mediaParm *(COMMA mediaParm) RBRKT + * MediaToken = ("Media" / "M") + * + * mediaParm = (streamParm / streamDescriptor /terminationStateDescriptor) + * + * ; at-most one terminationStateDescriptor + * ; and either streamParm(s) or streamDescriptor(s) but not both + * streamParm = ( localDescriptor / remoteDescriptor /localControlDescriptor ) + * localDescriptor = LocalToken LBRKT octetString RBRKT + * LocalToken = ("Local" / "L") + * octetString = *(nonEscapeChar) + * nonEscapeChar = ( "\}" / %x01-7C / %x7E-FF ) + * remoteDescriptor = RemoteToken LBRKT octetString RBRKT + * RemoteToken = ("Remote" / "R") + * localControlDescriptor = LocalControlToken LBRKT localParm*(COMMA localParm) RBRKT + * LocalControlToken = ("LocalControl" / "O") + * localParm = ( streamMode / propertyParm / reservedValueMode + * streamDescriptor = StreamToken EQUAL StreamID LBRKT streamParm*(COMMA streamParm) RBRKT + * StreamToken = ("Stream" / "ST") + * terminationStateDescriptor = TerminationStateToken LBRKTterminationStateParm + * *( COMMA terminationStateParm ) RBRKT + * TerminationStateToken = ("TerminationState" / "TS") + * terminationStateParm =(propertyParm / serviceStates / eventBufferControl ) + */ + +#define MEGACO_LOCAL_TOKEN 1 +#define MEGACO_REMOTE_TOKEN 2 +#define MEGACO_LOCAL_CONTROL_TOKEN 3 +#define MEGACO_STREAM_TOKEN 4 +#define MEGACO_TERMINATION_STATE_DESC 5 + +static const megaco_tokens_t megaco_mediaParm_names[] = { + { "Unknown-token", NULL }, /* 0 Pad so that the real headers start at index 1 */ + { "Local", "L" }, /* 1 */ + { "Remote", "R" }, /* 2 */ + { "LocalControl", "O" }, /* 3 */ + { "Stream", "ST" }, /* 4 */ + { "TerminationState", "TS" }, /* 5 */ +}; + +/* Returns index of megaco_tokens_t */ +static gint find_megaco_mediaParm_names(tvbuff_t *tvb, int offset, guint header_len) +{ + guint i; + + for (i = 1; i < array_length(megaco_mediaParm_names); i++) { + if (header_len == strlen(megaco_mediaParm_names[i].name) && + tvb_strncaseeql(tvb, offset, megaco_mediaParm_names[i].name, header_len) == 0) + return i; + if (megaco_mediaParm_names[i].compact_name != NULL && + header_len == strlen(megaco_mediaParm_names[i].compact_name) && + tvb_strncaseeql(tvb, offset, megaco_mediaParm_names[i].compact_name, header_len) == 0) + return i; + } + + return -1; +} + +static void +dissect_megaco_mediadescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,packet_info *pinfo, gint tvb_last_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, tvb_LBRKT, tvb_RBRKT; + gint tvb_next_offset, tvb_current_offset, tvb_offset, equal_offset; + gint mediaParm; + + + proto_tree *megaco_mediadescriptor_tree, *megaco_mediadescriptor_ti; + + tokenlen = 0; + tvb_next_offset = 0; + tvb_current_offset = 0; + tvb_offset = 0; + + /* + megaco_mediadescriptor_ti = proto_tree_add_text(megaco_tree_command_line,tvb,tvb_previous_offset,tokenlen,"Media Descriptor"); + megaco_mediadescriptor_tree = proto_item_add_subtree(megaco_mediadescriptor_ti, ett_megaco_mediadescriptor); + */ + while ( tvb_previous_offset < tvb_last_RBRKT){ + /* Start of token */ + tvb_current_offset = tvb_skip_wsp(tvb, tvb_previous_offset); + + /* Find token length */ + for (tvb_next_offset=tvb_current_offset; tvb_next_offset < tvb_last_RBRKT; tvb_next_offset++){ + if (!isalpha(tvb_get_guint8(tvb, tvb_next_offset ))){ + break; + } + } + tokenlen = tvb_next_offset - tvb_current_offset; + + mediaParm = find_megaco_mediaParm_names(tvb, tvb_current_offset, tokenlen); + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_next_offset , tvb_last_RBRKT, '{'); + tvb_next_offset = tvb_find_guint8(tvb, tvb_current_offset+1 , tvb_last_RBRKT, '}'); + tvb_RBRKT = tvb_next_offset; + + tokenlen = tvb_LBRKT - tvb_current_offset +1; + megaco_mediadescriptor_ti = proto_tree_add_text(megaco_tree_command_line,tvb,tvb_current_offset, + tokenlen,"%s",tvb_format_text(tvb, tvb_current_offset,tokenlen)); + + switch ( mediaParm ){ + case MEGACO_LOCAL_TOKEN: + tvb_current_offset = tvb_skip_wsp(tvb, tvb_LBRKT+1); + dissect_megaco_Localdescriptor(tvb,megaco_tree_command_line , pinfo, + tvb_RBRKT, tvb_current_offset); + tvb_current_offset = tvb_RBRKT; + break; + case MEGACO_REMOTE_TOKEN: + tvb_current_offset = tvb_skip_wsp(tvb, tvb_LBRKT+1); + dissect_megaco_Localdescriptor(tvb,megaco_tree_command_line , pinfo, + tvb_RBRKT, tvb_current_offset); + tvb_current_offset = tvb_RBRKT; + break; + case MEGACO_LOCAL_CONTROL_TOKEN: + tvb_current_offset = tvb_skip_wsp(tvb, tvb_LBRKT+1); + dissect_megaco_LocalControldescriptor(tvb,megaco_tree_command_line, pinfo , + tvb_RBRKT, tvb_current_offset); + tvb_current_offset = tvb_RBRKT; + break; + case MEGACO_STREAM_TOKEN: + megaco_mediadescriptor_tree = proto_item_add_subtree(megaco_mediadescriptor_ti, ett_megaco_mediadescriptor); + + equal_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_last_RBRKT, '='); + tvb_current_offset = tvb_skip_wsp(tvb, equal_offset+1); + tvb_offset = tvb_skip_wsp_return(tvb, tvb_LBRKT-1); + tokenlen = tvb_offset - tvb_current_offset; + + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_streamid, tvb, + tvb_current_offset, tokenlen, tvb_format_text(tvb, tvb_current_offset,tokenlen)); + tvb_previous_offset = tvb_LBRKT+1; + continue; + case MEGACO_TERMINATION_STATE_DESC: + tvb_current_offset = tvb_skip_wsp(tvb, tvb_LBRKT+1); + dissect_megaco_TerminationStatedescriptor(tvb,megaco_tree_command_line , + tvb_RBRKT, tvb_current_offset); + tvb_current_offset = tvb_RBRKT; + break; + default: + break; + }; + /* more parameters ? */ + tvb_next_offset = tvb_find_guint8(tvb, tvb_current_offset+1 , tvb_last_RBRKT, ','); + if ( tvb_next_offset != -1){ + tokenlen = tvb_next_offset - tvb_RBRKT+1; + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_RBRKT, tokenlen, + "%s", tvb_format_text(tvb, tvb_RBRKT, tokenlen)); + tvb_previous_offset = tvb_next_offset+1; + }else{ + /* Add the trailing '}'*/ + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_RBRKT, 1, + "%s", tvb_format_text(tvb, tvb_RBRKT, 1)); + tvb_previous_offset = tvb_last_RBRKT; + } + + } /* End while */ +} + +static void +dissect_megaco_h245(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree, gint offset, gint len, gchar *msg) +{ + proto_item *item; + proto_tree *tree; + guint8 *buf = ep_alloc(10240); + + /*item=proto_tree_add_string(megaco_tree, hf_megaco_h245, tvb, + offset, len, msg ); + */ + item = proto_tree_add_text(megaco_tree, tvb, offset, len, + "%s", msg); + + tree = proto_item_add_subtree(item, ett_megaco_h245); + + /* arbitrary maximum length */ + if(len<20480){ + int i; + tvbuff_t *h245_tvb; + + /* first, skip to where the encoded pdu starts, this is + the first hex digit after the '=' char. + */ + while(1){ + if((*msg==0)||(*msg=='\n')){ + return; + } + if(*msg=='='){ + msg++; + break; + } + msg++; + } + while(1){ + if((*msg==0)||(*msg=='\n')){ + return; + } + if( ((*msg>='0')&&(*msg<='9')) + || ((*msg>='a')&&(*msg<='f')) + || ((*msg>='A')&&(*msg<='F'))){ + break; + } + msg++; + } + i=0; + while( ((*msg>='0')&&(*msg<='9')) + ||((*msg>='a')&&(*msg<='f')) + ||((*msg>='A')&&(*msg<='F')) ){ + int val; + if((*msg>='0')&&(*msg<='9')){ + val=(*msg)-'0'; + } else if((*msg>='a')&&(*msg<='f')){ + val=(*msg)-'a'+10; + } else if((*msg>='A')&&(*msg<='F')){ + val=(*msg)-'A'+10; + } else { + return; + } + val<<=4; + msg++; + if((*msg>='0')&&(*msg<='9')){ + val|=(*msg)-'0'; + } else if((*msg>='a')&&(*msg<='f')){ + val|=(*msg)-'a'+10; + } else if((*msg>='A')&&(*msg<='F')){ + val|=(*msg)-'A'+10; + } else { + return; + } + msg++; + + buf[i]=(guint8)val; + i++; + } + if(i==0){ + return; + } + h245_tvb = tvb_new_real_data(buf,i,i); + tvb_set_child_real_data_tvbuff(tvb,h245_tvb); + add_new_data_source(pinfo, h245_tvb, "H.245 over MEGACO"); + /* should go through a handle, however, the two h245 entry + points are different, one is over tpkt and the other is raw + */ + call_dissector(h245_handle, h245_tvb, pinfo, top_tree); +/* dissect_h245_MultimediaSystemControlMessage(h245_tvb, pinfo, tree);*/ + } +} + +static void +dissect_megaco_h324_h223caprn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree, gint offset _U_, gint len, gchar *msg) +{ + guint8 *buf = ep_alloc(10240); + asn1_ctx_t actx; + + /* arbitrary maximum length */ + if(len<20480){ + int i; + tvbuff_t *h245_tvb; + + /* first, skip to where the encoded pdu starts, this is + the first hex digit after the '=' char. + */ + while(1){ + if((*msg==0)||(*msg=='\n')){ + return; + } + if(*msg=='='){ + msg++; + break; + } + msg++; + } + while(1){ + if((*msg==0)||(*msg=='\n')){ + return; + } + if( ((*msg>='0')&&(*msg<='9')) + || ((*msg>='a')&&(*msg<='f')) + || ((*msg>='A')&&(*msg<='F'))){ + break; + } + msg++; + } + i=0; + while( ((*msg>='0')&&(*msg<='9')) + ||((*msg>='a')&&(*msg<='f')) + ||((*msg>='A')&&(*msg<='F')) ){ + int val; + if((*msg>='0')&&(*msg<='9')){ + val=(*msg)-'0'; + } else if((*msg>='a')&&(*msg<='f')){ + val=(*msg)-'a'+10; + } else if((*msg>='A')&&(*msg<='F')){ + val=(*msg)-'A'+10; + } else { + return; + } + val<<=4; + msg++; + if((*msg>='0')&&(*msg<='9')){ + val|=(*msg)-'0'; + } else if((*msg>='a')&&(*msg<='f')){ + val|=(*msg)-'a'+10; + } else if((*msg>='A')&&(*msg<='F')){ + val|=(*msg)-'A'+10; + } else { + return; + } + msg++; + + buf[i]=(guint8)val; + i++; + } + if(i==0){ + return; + } + h245_tvb = tvb_new_real_data(buf,i,i); + tvb_set_child_real_data_tvbuff(tvb,h245_tvb); + add_new_data_source(pinfo, h245_tvb, "H.245 over MEGACO"); + /* should go through a handle, however, the two h245 entry + points are different, one is over tpkt and the other is raw + */ + asn1_ctx_init(&actx, ASN1_ENC_PER, TRUE, pinfo); + dissect_h245_H223Capability(h245_tvb, 0, &actx, megaco_tree, hf_megaco_h223Capability); + } +} + +static void +dissect_megaco_eventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset; + gint tvb_events_end_offset, tvb_events_start_offset, tvb_LBRKT; + proto_tree *megaco_eventsdescriptor_tree, *megaco_eventsdescriptor_ti; + + guint8 tempchar; + gint requested_event_start_offset, requested_event_end_offset; + proto_tree *megaco_requestedevent_tree, *megaco_requestedevent_ti; + + tokenlen = 0; + tvb_current_offset = 0; + tvb_next_offset = 0; + tvb_help_offset = 0; + tvb_events_end_offset = 0; + tvb_events_start_offset = 0; + tvb_help_offset = 0; + requested_event_start_offset = 0; + requested_event_end_offset = 0; + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + + megaco_eventsdescriptor_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + + /* + megaco_eventsdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_events_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE); + */ + megaco_eventsdescriptor_tree = proto_item_add_subtree(megaco_eventsdescriptor_ti, ett_megaco_eventsdescriptor); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '='); + tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + + if ( tvb_current_offset < tvb_RBRKT && tvb_current_offset != -1 ){ + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_current_offset +1); + tvb_help_offset = tvb_skip_wsp_return(tvb, tvb_next_offset-1); + + tokenlen = tvb_help_offset - tvb_current_offset; + + proto_tree_add_string(megaco_eventsdescriptor_tree, hf_megaco_requestid, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_events_end_offset = tvb_RBRKT; + tvb_events_start_offset = tvb_previous_offset; + + tvb_RBRKT = tvb_next_offset+1; + tvb_LBRKT = tvb_next_offset+1; + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_next_offset+1); + + + do { + + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_events_end_offset, '}'); + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT, + tvb_events_end_offset, '{'); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, + tvb_events_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_events_end_offset){ + tvb_current_offset = tvb_events_end_offset; + } + + + /* Descriptor includes no parameters */ + + if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){ + + tvb_RBRKT = tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1; + } + + /* Descriptor includes Parameters */ + + if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){ + + while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){ + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1, + tvb_events_end_offset, '{'); + if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1) + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_events_end_offset, '}'); + } + + } + + tvb_help_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_events_end_offset, '{'); + + /* if there are eventparameter */ + + if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){ + + requested_event_start_offset = tvb_help_offset; + requested_event_end_offset = tvb_RBRKT; + tvb_help_offset = tvb_skip_wsp_return(tvb, tvb_help_offset-1); + tokenlen = tvb_help_offset - tvb_previous_offset; + } + /* no parameters */ + else { + tokenlen = tvb_RBRKT+1 - tvb_previous_offset; + } + + megaco_requestedevent_ti = proto_tree_add_item(megaco_eventsdescriptor_tree,hf_megaco_pkgdname,tvb,tvb_previous_offset,tokenlen, FALSE); + megaco_requestedevent_tree = proto_item_add_subtree(megaco_requestedevent_ti, ett_megaco_requestedevent); + + if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){ + + tvb_help_offset = tvb_skip_wsp(tvb, requested_event_start_offset +1); + tempchar = tvb_get_guint8(tvb, tvb_help_offset); + + requested_event_start_offset = tvb_skip_wsp(tvb, requested_event_start_offset +1); + requested_event_end_offset = tvb_skip_wsp_return(tvb, requested_event_end_offset-1); + + if ( tempchar == 'D' ){ + dissect_megaco_digitmapdescriptor(tvb, megaco_requestedevent_tree, requested_event_end_offset, requested_event_start_offset); + } + else{ + gchar *msg; + + tokenlen = requested_event_end_offset - requested_event_start_offset; + msg=tvb_format_text(tvb,requested_event_start_offset, tokenlen); + if(!strncmp("h245", msg, 4)){ + dissect_megaco_h245(tvb, pinfo, megaco_requestedevent_tree, requested_event_start_offset, tokenlen, msg); + } else { + proto_tree_add_text(megaco_requestedevent_tree, tvb, requested_event_start_offset, tokenlen, + "%s", msg); + } + } + + } + + tvb_current_offset = tvb_find_guint8(tvb, tvb_RBRKT, + tvb_events_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_events_end_offset ){ + tvb_current_offset = tvb_events_end_offset; + } + + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_current_offset+1); + + tvb_LBRKT = tvb_previous_offset; + tvb_RBRKT = tvb_previous_offset; + + } while ( tvb_current_offset < tvb_events_end_offset ); + } +} + +static void +dissect_megaco_signaldescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, pkg_tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset; + gint tvb_signals_end_offset, tvb_signals_start_offset, tvb_LBRKT; + /*proto_tree *megaco_signalsdescriptor_tree, *megaco_signalsdescriptor_ti;*/ + + gint requested_signal_start_offset, requested_signal_end_offset; + proto_tree *megaco_requestedsignal_tree, *megaco_requestedsignal_ti; + + tokenlen = 0; + tvb_current_offset = 0; + tvb_next_offset = 0; + tvb_help_offset = 0; + tvb_signals_end_offset = 0; + tvb_signals_start_offset = 0; + tvb_LBRKT = 0; + requested_signal_start_offset = 0; + requested_signal_end_offset = 0; + + tvb_signals_end_offset = tvb_RBRKT; + tvb_signals_start_offset = tvb_previous_offset; + + if(toupper(tvb_get_guint8(tvb, tvb_previous_offset+1))=='G') + tokenlen = 2; /* token is compact text (SG) */ + else + tokenlen = 7; /* token must be verbose text (Signals) */ + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_previous_offset+tokenlen); + + if(tvb_get_guint8(tvb, tvb_current_offset)!='{') { /* {} has been omitted */ + + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_start_offset, tokenlen, + "%s", "Empty Signal Descriptor"); + + if(check_col(pinfo->cinfo, COL_INFO)) + col_append_str(pinfo->cinfo, COL_INFO, " (Signal:none)"); /* then say so */ + + return; /* and return */ + } + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_signals_end_offset, '{'); + tokenlen = (tvb_LBRKT+1) - tvb_signals_start_offset; + + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_start_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_signals_start_offset, tokenlen)); + + /* + megaco_signalsdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_signal_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE); + megaco_signalsdescriptor_tree = proto_item_add_subtree(megaco_signalsdescriptor_ti, ett_megaco_signalsdescriptor); + */ + + tvb_current_offset = tvb_LBRKT; + tvb_next_offset = tvb_skip_wsp(tvb, tvb_current_offset+1); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " (Signal:%s)",tvb_format_text(tvb, tvb_current_offset,tokenlen-tvb_current_offset+tvb_previous_offset)); + + + if ( tvb_current_offset < tvb_signals_end_offset && tvb_current_offset != -1 && tvb_next_offset != tvb_signals_end_offset){ + + + tvb_RBRKT = tvb_next_offset+1; + tvb_LBRKT = tvb_next_offset+1; + tvb_previous_offset = tvb_next_offset; + + + do { + + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_signals_end_offset, '}'); + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT, + tvb_signals_end_offset, '{'); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, + tvb_signals_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_signals_end_offset){ + tvb_current_offset = tvb_signals_end_offset; + } + + + /* Descriptor includes no parameters */ + + if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){ + + tvb_RBRKT = tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1; + } + + /* Descriptor includes Parameters */ + + if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){ + + while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){ + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1, + tvb_signals_end_offset, '{'); + if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1) + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_signals_end_offset, '}'); + } + + } + + tvb_help_offset = tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_signals_end_offset, '{'); + + /* if there are signalparameter */ + + if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){ + + requested_signal_start_offset = tvb_help_offset; + requested_signal_end_offset = tvb_RBRKT; + tvb_help_offset = tvb_skip_wsp_return(tvb, tvb_help_offset-1); + pkg_tokenlen = tvb_help_offset - tvb_previous_offset; + tokenlen = tvb_LBRKT+1 - tvb_previous_offset; + } + /* no parameters */ + else { + tokenlen = pkg_tokenlen = tvb_RBRKT+1 - tvb_previous_offset; + } + + megaco_requestedsignal_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + megaco_requestedsignal_tree = proto_item_add_subtree(megaco_requestedsignal_ti, ett_megaco_requestedsignal); + + proto_tree_add_item(megaco_requestedsignal_tree,hf_megaco_pkgdname,tvb,tvb_previous_offset,pkg_tokenlen, FALSE); + + if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){ + gchar *msg; + + requested_signal_start_offset = tvb_skip_wsp(tvb, requested_signal_start_offset +1); + requested_signal_end_offset = tvb_skip_wsp_return(tvb, requested_signal_end_offset-1); + + tokenlen = requested_signal_end_offset - requested_signal_start_offset; + + msg=tvb_format_text(tvb,requested_signal_start_offset, tokenlen+1); + if(!strncmp("h245", msg, 4)){ + dissect_megaco_h245(tvb, pinfo, megaco_tree_command_line, requested_signal_start_offset, tokenlen, msg); + } else { + proto_tree_add_text(megaco_tree_command_line, tvb, requested_signal_start_offset, tokenlen, + "%s", msg); + } + /* Print the trailing '}' */ + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_RBRKT, 1, + "%s", tvb_format_text(tvb, tvb_RBRKT, 1)); + } + + tvb_current_offset = tvb_find_guint8(tvb, tvb_RBRKT, + tvb_signals_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_signals_end_offset || tvb_current_offset < tvb_previous_offset){ + tvb_current_offset = tvb_signals_end_offset; + } + + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_current_offset+1); + + tvb_LBRKT = tvb_previous_offset; + tvb_RBRKT = tvb_previous_offset; + /* Print the trailing '}' */ + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_end_offset, 1, + "%s", tvb_format_text(tvb, tvb_signals_end_offset, 1)); + + } while ( tvb_current_offset < tvb_signals_end_offset ); + }else{ + /* signals{}*/ + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_end_offset, 1, + "%s", tvb_format_text(tvb, tvb_signals_end_offset, 1)); + } + + +} +static void +dissect_megaco_auditdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree, packet_info *pinfo, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, tvb_LBRKT; + /*proto_tree *megaco_auditdescriptor_tree, *megaco_auditdescriptor_ti;*/ + + tokenlen = 0; + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + tokenlen = (tvb_LBRKT + 1) - tvb_previous_offset; + proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + + /* + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + + megaco_auditdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_audit_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE); + megaco_auditdescriptor_tree = proto_item_add_subtree(megaco_auditdescriptor_ti, ett_megaco_auditdescriptor); + */ + + tvb_previous_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + + if ( tvb_skip_wsp(tvb, tvb_previous_offset +1) != tvb_RBRKT ){ + dissect_megaco_descriptors(tvb, megaco_tree, pinfo, tvb_previous_offset,tvb_RBRKT); + }else{ + proto_tree_add_text(megaco_tree, tvb, tvb_RBRKT, 1, + "%s",tvb_format_text(tvb, tvb_RBRKT, 1)); + + } +} +/* + * serviceChangeDescriptor = ServicesToken LBRKT serviceChangeParm + * *(COMMA serviceChangeParm) RBRKT + * + * ServicesToken = ("Services" / "SV") + * + * serviceChangeParm = (serviceChangeMethod / serviceChangeReason / + * serviceChangeDelay / serviceChangeAddress / + * serviceChangeProfile / extension / TimeStamp / + * serviceChangeMgcId / serviceChangeVersion ) + * + */ +#define MEGACO_REASON_TOKEN 1 +#define MEGACO_DELAY_TOKEN 2 +#define MEGACO_SC_ADDR_TOKEN 3 +#define MEGACO_MGC_ID_TOKEN 4 +#define MEGACO_PROFILE_TOKEN 5 +#define MEGACO_VERSION_TOKEN 6 +#define MEGACO_METHOD_TOKEN 7 + +static const megaco_tokens_t megaco_serviceChangeParm_names[] = { + { "Unknown-token", NULL }, /* 0 Pad so that the real headers start at index 1 */ + /* streamMode */ + { "Reason", "RE" }, /* 1 ReasonToken*/ + { "Delay", "DL" }, /* 2 DelayToken */ + { "ServiceChangeAddress", "AD" }, /* 3 ServiceChangeAddressToken */ + { "MgcIdToTry", "MG" }, /* 4 MgcIdToken */ + { "Profile", "PF" }, /* 5 ProfileToken */ + { "Version", "V" }, /* 6 VersionToken */ + { "Method", "MT" }, /* 7 MethodToken */ +}; + +/* Returns index of megaco_tokens_t */ +static gint find_megaco_megaco_serviceChangeParm_names(tvbuff_t *tvb, int offset, guint header_len) +{ + guint i; + + for (i = 1; i < array_length(megaco_serviceChangeParm_names); i++) { + if (header_len == strlen(megaco_serviceChangeParm_names[i].name) && + tvb_strncaseeql(tvb, offset, megaco_serviceChangeParm_names[i].name, header_len) == 0) + return i; + if (megaco_serviceChangeParm_names[i].compact_name != NULL && + header_len == strlen(megaco_serviceChangeParm_names[i].compact_name) && + tvb_strncaseeql(tvb, offset, megaco_serviceChangeParm_names[i].compact_name, header_len) == 0) + return i; + } + + return -1; +} +/* + * ServiceChangeReasons References + * -------------------- ---------- + */ +static const value_string MEGACO_ServiceChangeReasons_vals[] = { + {900, "Service Restored"}, + {901, "Cold Boot"}, + {902, "Warm Boot"}, + {903, "MGC Directed Change"}, + {904, "Termination malfunctioning"}, + {905, "Termination taken out of service"}, + {906, "Loss of lower layer connectivity (e.g. downstream sync)"}, + {907, "Transmission Failure"}, + {908, "MG Impending Failure"}, + {909, "MGC Impending Failure"}, + {910, "Media Capability Failure"}, + {911, "Modem Capability Failure"}, + {912, "Mux Capability Failure"}, + {913, "Signal Capability Failure"}, + {914, "Event Capability Failure"}, + {915, "State Loss"}, + {916, "Packages Change"}, + {917, "Capabilities Change"}, + {918, "Cancel Graceful"}, + {919, "Warm Failover"}, + {920, "Cold Failover"}, + { 0, NULL } +}; + +static void +dissect_megaco_servicechangedescriptor(tvbuff_t *tvb, proto_tree *megaco_tree, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, tvb_LBRKT, tvb_offset; + gint token_index; + gint tvb_current_offset; + gboolean more_params = TRUE; + proto_item* item; + gint reason; + guint8 ServiceChangeReason_str[4]; + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + /* + if (tvb_LBRKT == -1) + return; + */ + tokenlen = (tvb_LBRKT + 1) - tvb_previous_offset; + proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + + + /* Start dissecting serviceChangeParm */ + tvb_previous_offset = tvb_LBRKT + 1; + while (more_params){ + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_previous_offset); + /* Find token length */ + for (tvb_offset=tvb_previous_offset; tvb_offset < tvb_RBRKT; tvb_offset++){ + if (!isalpha(tvb_get_guint8(tvb, tvb_offset ))){ + break; + } + } + tokenlen = tvb_offset - tvb_previous_offset; + token_index = find_megaco_megaco_serviceChangeParm_names(tvb, tvb_previous_offset, tokenlen); + + tvb_offset = tvb_find_guint8(tvb, tvb_offset, tvb_RBRKT, ','); + if ((tvb_offset == -1)||(tvb_offset >=tvb_RBRKT)){ + more_params = FALSE; + tvb_offset = tvb_skip_wsp_return(tvb, tvb_RBRKT-1); + } + tokenlen = tvb_offset - tvb_previous_offset; + if (more_params == TRUE ) + /* Include ',' */ + tokenlen++; + switch(token_index){ + case MEGACO_REASON_TOKEN: + /* ReasonToken EQUAL VALUE + * VALUE = quotedString / 1*(SafeChar) + */ + item = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + + /* As the reason code ( if a digit ) can be in quoted string or 'just' digit + * look for a nine and hope for the best. + */ + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '9'); + if ( tvb_current_offset == -1) + break; + + tvb_get_nstringz0(tvb,tvb_current_offset,4,ServiceChangeReason_str); + reason = atoi((gchar*)ServiceChangeReason_str); + + proto_item_append_text(item,"[ %s ]", val_to_str(reason, MEGACO_ServiceChangeReasons_vals,"Unknown (%u)")); + break; + case MEGACO_DELAY_TOKEN: + case MEGACO_SC_ADDR_TOKEN: + case MEGACO_MGC_ID_TOKEN: + case MEGACO_PROFILE_TOKEN: + case MEGACO_VERSION_TOKEN: + case MEGACO_METHOD_TOKEN: + /* No special dissection: fall trough */ + default: + /* Unknown or: + * extension = extensionParameter parmValue + * extensionParameter = "X" ("-" / "+") 1*6(ALPHA / DIGIT) + */ + proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + break; + } + + tvb_previous_offset = tvb_offset +1; + + }/*End while */ + + /* extension = extensionParameter parmValue + * extensionParameter = "X" ("-" / "+") 1*6(ALPHA / DIGIT) + */ + + /* + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_servicechange_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + */ + proto_tree_add_text(megaco_tree, tvb, tvb_RBRKT, 1,"%s", tvb_format_text(tvb, tvb_RBRKT, 1)); + +} +static void +dissect_megaco_digitmapdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen; + + tokenlen = 0; + + tokenlen = tvb_RBRKT - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_digitmap_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + +} +static void +dissect_megaco_statisticsdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen; + + tokenlen = 0; + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_statistics_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + +} +static void +dissect_megaco_observedeventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, pkg_tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset; + gint tvb_observedevents_end_offset, tvb_observedevents_start_offset, tvb_LBRKT; + proto_tree *megaco_observedeventsdescriptor_tree, *megaco_observedeventsdescriptor_ti; + + guint8 tempchar; + gint requested_event_start_offset, requested_event_end_offset, param_start_offset, param_end_offset; + proto_tree *megaco_observedevent_tree, *megaco_observedevent_ti; + + tokenlen = 0; + tvb_current_offset = 0; + tvb_next_offset = 0; + tvb_help_offset = 0; + tvb_observedevents_end_offset = 0; + tvb_observedevents_start_offset = 0; + tvb_LBRKT = 0; + requested_event_start_offset = 0; + requested_event_end_offset = 0; + + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + tvb_next_offset = tvb_LBRKT; + tokenlen = (tvb_next_offset+1) - tvb_previous_offset; + + /* + megaco_observedeventsdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_observedevents_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE); + megaco_observedeventsdescriptor_tree = proto_item_add_subtree(megaco_observedeventsdescriptor_ti, ett_megaco_observedeventsdescriptor); + */ + + megaco_observedeventsdescriptor_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + megaco_observedeventsdescriptor_tree = proto_item_add_subtree(megaco_observedeventsdescriptor_ti, ett_megaco_observedeventsdescriptor); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '='); + tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + + if ( tvb_current_offset < tvb_RBRKT && tvb_current_offset != -1 ){ + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_current_offset +1); + tvb_help_offset = tvb_skip_wsp_return(tvb, tvb_next_offset-1); + + tokenlen = tvb_help_offset - tvb_current_offset; + + proto_tree_add_string(megaco_observedeventsdescriptor_tree, hf_megaco_requestid, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_observedevents_end_offset = tvb_RBRKT; + tvb_observedevents_start_offset = tvb_previous_offset; + + tvb_RBRKT = tvb_next_offset+1; + tvb_LBRKT = tvb_next_offset+1; + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_next_offset+1); + + + do { + + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_observedevents_end_offset, '}'); + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT, + tvb_observedevents_end_offset, '{'); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, + tvb_observedevents_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_observedevents_end_offset){ + tvb_current_offset = tvb_observedevents_end_offset; + } + + + /* Descriptor includes no parameters */ + + if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){ + + tvb_RBRKT = tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1; + } + + /* Descriptor includes Parameters */ + + if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){ + + while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){ + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1, + tvb_observedevents_end_offset, '{'); + if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1){ + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_observedevents_end_offset, '}'); + } + } + + } + + tvb_LBRKT = tvb_help_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_observedevents_end_offset, '{'); + + /* if there are eventparameter */ + + if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){ + + requested_event_start_offset = tvb_help_offset; + requested_event_end_offset = tvb_RBRKT; + tvb_help_offset = tvb_skip_wsp_return(tvb, tvb_help_offset-1); + pkg_tokenlen = tvb_help_offset - tvb_previous_offset; + tokenlen = tvb_LBRKT+1 - tvb_previous_offset; + } + /* no parameters */ + else { + tokenlen = pkg_tokenlen = tvb_RBRKT+1 - tvb_previous_offset; + } + + megaco_observedevent_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen)); + + megaco_observedevent_tree = proto_item_add_subtree(megaco_observedevent_ti, ett_megaco_observedevent); + + proto_tree_add_item(megaco_observedevent_tree,hf_megaco_pkgdname,tvb,tvb_previous_offset,pkg_tokenlen, FALSE); + + if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){ + + tvb_help_offset = tvb_skip_wsp(tvb, requested_event_start_offset +1); + tempchar = tvb_get_guint8(tvb, tvb_help_offset); + + requested_event_start_offset = tvb_skip_wsp(tvb, requested_event_start_offset +1)-1; + requested_event_end_offset = tvb_skip_wsp_return(tvb, requested_event_end_offset-1); + + tvb_help_offset = requested_event_start_offset; + + do { + gchar *msg; + + param_start_offset = tvb_skip_wsp(tvb, tvb_help_offset+1); + + tvb_help_offset = tvb_find_guint8(tvb, tvb_help_offset+1,requested_event_end_offset, ','); + + if ( tvb_help_offset > requested_event_end_offset || tvb_help_offset == -1){ + tvb_help_offset = requested_event_end_offset; + } + + param_end_offset = tvb_skip_wsp(tvb, tvb_help_offset-1); + + tokenlen = param_end_offset - param_start_offset+1; + msg=tvb_format_text(tvb,param_start_offset, tokenlen); + if(!strncmp("h245", msg, 4)){ + dissect_megaco_h245(tvb, pinfo, megaco_tree_command_line, param_start_offset, tokenlen, msg); + } else { + proto_tree_add_text(megaco_tree_command_line, tvb, param_start_offset, tokenlen, + "%s", msg); + } + + + } while ( tvb_help_offset < requested_event_end_offset ); + } + + tvb_previous_offset = tvb_current_offset; + tvb_current_offset = tvb_find_guint8(tvb, tvb_RBRKT, + tvb_observedevents_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_observedevents_end_offset ){ + tvb_current_offset = tvb_observedevents_end_offset; + } + if (tvb_current_offset < tvb_previous_offset) { + proto_tree_add_text(megaco_observedevent_tree, tvb, 0, 0, "[ Parse error: Invalid offset ]"); + return; + } + + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_current_offset+1); + + tvb_LBRKT = tvb_previous_offset; + tvb_RBRKT = tvb_previous_offset; + /* Print the trailing '}' */ + proto_tree_add_text(megaco_tree_command_line, tvb, tvb_observedevents_end_offset, 1, + "%s", tvb_format_text(tvb, tvb_observedevents_end_offset, 1)); + + } while ( tvb_current_offset < tvb_observedevents_end_offset ); + } +} +static void +dissect_megaco_topologydescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen; + + tokenlen = 0; + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + proto_tree_add_string(megaco_tree_command_line, hf_megaco_topology_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + +} +static void +dissect_megaco_Packagesdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset; + gint tvb_packages_end_offset, tvb_packages_start_offset, tvb_LBRKT; + proto_tree *megaco_packagesdescriptor_tree, *megaco_packagesdescriptor_ti; + + tokenlen = 0; + tvb_current_offset = 0; + tvb_next_offset = 0; + tvb_help_offset = 0; + tvb_packages_end_offset = 0; + tvb_packages_start_offset = 0; + tvb_LBRKT = 0; + + tokenlen = (tvb_RBRKT+1) - tvb_previous_offset; + + megaco_packagesdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_packages_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE); + megaco_packagesdescriptor_tree = proto_item_add_subtree(megaco_packagesdescriptor_ti, ett_megaco_packagesdescriptor); + + + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '='); + tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{'); + + if ( tvb_current_offset < tvb_RBRKT && tvb_current_offset != -1 ){ + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_current_offset +1); + tvb_help_offset = tvb_skip_wsp_return(tvb, tvb_next_offset-1); + + tokenlen = tvb_help_offset - tvb_current_offset; + + proto_tree_add_string(megaco_packagesdescriptor_tree, hf_megaco_requestid, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_packages_end_offset = tvb_RBRKT; + tvb_packages_start_offset = tvb_previous_offset; + + tvb_RBRKT = tvb_next_offset+1; + tvb_LBRKT = tvb_next_offset+1; + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_next_offset+1); + + + do { + + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_packages_end_offset, '}'); + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT, + tvb_packages_end_offset, '{'); + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, + tvb_packages_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_packages_end_offset){ + tvb_current_offset = tvb_packages_end_offset; + } + + + /* Descriptor includes no parameters */ + + if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){ + + tvb_RBRKT = tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1; + } + + /* Descriptor includes Parameters */ + + if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){ + + while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){ + + tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1, + tvb_packages_end_offset, '{'); + if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1) + tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1, + tvb_packages_end_offset, '}'); + } + + } + + tokenlen = tvb_RBRKT+1 - tvb_previous_offset; + + proto_tree_add_text(megaco_packagesdescriptor_tree, tvb, tvb_previous_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_previous_offset, + tokenlen)); + + + tvb_current_offset = tvb_find_guint8(tvb, tvb_RBRKT, + tvb_packages_end_offset, ','); + + if (tvb_current_offset == -1 || tvb_current_offset > tvb_packages_end_offset ){ + tvb_current_offset = tvb_packages_end_offset; + } + + tvb_previous_offset = tvb_skip_wsp(tvb, tvb_current_offset+1); + + tvb_LBRKT = tvb_previous_offset; + tvb_RBRKT = tvb_previous_offset; + + } while ( tvb_current_offset < tvb_packages_end_offset ); + } + +} +/* The list of error code values is fetched from http://www.iana.org/assignments/megaco-h248 */ +/* 2003-08-28 */ + +static const value_string MEGACO_error_code_vals[] = { + + {400, "Syntax error in message"}, + {401, "Protocol Error"}, + {402, "Unauthorized"}, + {403, "Syntax error in transaction request"}, + {406, "Version Not Supported"}, + {410, "Incorrect identifier"}, + {411, "The transaction refers to an unknown ContextId"}, + {412, "No ContextIDs available"}, + {421, "Unknown action or illegal combination of actions"}, + {422, "Syntax Error in Action"}, + {430, "Unknown TerminationID"}, + {431, "No TerminationID matched a wildcard"}, + {432, "Out of TerminationIDs or No TerminationID available"}, + {433, "TerminationID is already in a Context"}, + {434, "Max number of Terminations in a Context exceeded"}, + {435, "Termination ID is not in specified Context"}, + {440, "Unsupported or unknown Package"}, + {441, "Missing Remote or Local Descriptor"}, + {442, "Syntax Error in Command"}, + {443, "Unsupported or Unknown Command"}, + {444, "Unsupported or Unknown Descriptor"}, + {445, "Unsupported or Unknown Property"}, + {446, "Unsupported or Unknown Parameter"}, + {447, "Descriptor not legal in this command"}, + {448, "Descriptor appears twice in a command"}, + {450, "No such property in this package"}, + {451, "No such event in this package"}, + {452, "No such signal in this package"}, + {453, "No such statistic in this package"}, + {454, "No such parameter value in this package"}, + {455, "Property illegal in this Descriptor"}, + {456, "Property appears twice in this Descriptor"}, + {457, "Missing parameter in signal or event"}, + {458, "Unexpected Event/Request ID"}, + {459, "Unsupported or Unknown Profile"}, + {471, "Implied Add for Multiplex failure"}, + + {500, "Internal software Failure in MG"}, + {501, "Not Implemented"}, + {502, "Not ready."}, + {503, "Service Unavailable"}, + {504, "Command Received from unauthorized entity"}, + {505, "Transaction Request Received before a Service Change Reply has been received"}, + {506, "Number of Transaction Pendings Exceeded"}, + {510, "Insufficient resources"}, + {512, "Media Gateway unequipped to detect requested Event"}, + {513, "Media Gateway unequipped to generate requested Signals"}, + {514, "Media Gateway cannot send the specified announcement"}, + {515, "Unsupported Media Type"}, + {517, "Unsupported or invalid mode"}, + {518, "Event buffer full"}, + {519, "Out of space to store digit map"}, + {520, "Digit Map undefined in the MG"}, + {521, "Termination is ServiceChangeing"}, + {526, "Insufficient bandwidth"}, + {529, "Internal hardware failure in MG"}, + {530, "Temporary Network failure"}, + {531, "Permanent Network failure"}, + {532, "Audited Property, Statistic, Event or Signal does not exist"}, + {533, "Response exceeds maximum transport PDU size"}, + {534, "Illegal write or read only property"}, + {540, "Unexpected initial hook state"}, + {581, "Does Not Exist"}, + + {600, "Illegal syntax within an announcement specification"}, + {601, "Variable type not supported"}, + {602, "Variable value out of range"}, + {603, "Category not supported"}, + {604, "Selector type not supported"}, + {605, "Selector value not supported"}, + {606, "Unknown segment ID"}, + {607, "Mismatch between play specification and provisioned data"}, + {608, "Provisioning error"}, + {609, "Invalid offset"}, + {610, "No free segment IDs"}, + {611, "Temporary segment not found"}, + {612, "Segment in use"}, + {613, "ISP port limit overrun"}, + {614, "No modems available"}, + {615, "Calling number unacceptable"}, + {616, "Called number unacceptable"}, + { 0, NULL } +}; + + + +static void +dissect_megaco_errordescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, gint tvb_RBRKT, gint tvb_previous_offset) +{ + + gint tokenlen; + gint error_code; + guint8 error[4]; + gint tvb_next_offset, tvb_current_offset,tvb_len; + proto_item* item; + + tvb_len = tvb_length(tvb); + tokenlen = 0; + tvb_next_offset = 0; + tvb_current_offset = 0; + tvb_len = 0; + + tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset , tvb_RBRKT, '='); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_current_offset +1); + tvb_get_nstringz0(tvb,tvb_current_offset,4,error); + error_code = atoi((gchar*)error); + proto_tree_add_string_hidden(megaco_tree_command_line, hf_megaco_error_descriptor, tvb, + tvb_current_offset, 3, + tvb_format_text(tvb, tvb_current_offset, + 3)); + + tokenlen = (tvb_RBRKT) - tvb_previous_offset+1; + + + proto_tree_add_string(megaco_tree_command_line, hf_megaco_error_descriptor, tvb, + tvb_previous_offset, tokenlen, + tvb_format_text(tvb, tvb_previous_offset, + tokenlen)); + + item = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_current_offset, 3, + "Error code: %s", + val_to_str(error_code, MEGACO_error_code_vals, + "Unknown (%u)")); + + PROTO_ITEM_SET_GENERATED(item); + +} +static void +dissect_megaco_TerminationStatedescriptor(tvbuff_t *tvb, proto_tree *megaco_mediadescriptor_tree, gint tvb_next_offset, gint tvb_current_offset) +{ + gint tokenlen; + gint tvb_offset; + guint8 tempchar; + + proto_tree *megaco_TerminationState_tree, *megaco_TerminationState_ti; + + tokenlen = 0; + tvb_offset = 0; + + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_next_offset, '='); + + tokenlen = tvb_next_offset - tvb_current_offset; + /* + megaco_TerminationState_ti = proto_tree_add_item(megaco_mediadescriptor_tree,hf_megaco_TerminationState_descriptor,tvb,tvb_current_offset,tokenlen, FALSE); + megaco_TerminationState_tree = proto_item_add_subtree(megaco_TerminationState_ti, ett_megaco_TerminationState); + */ + megaco_TerminationState_ti = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_current_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_current_offset, tokenlen)); + megaco_TerminationState_tree = proto_item_add_subtree(megaco_TerminationState_ti, ett_megaco_TerminationState); + + while ( tvb_offset < tvb_next_offset && tvb_offset != -1 ){ + + tempchar = tvb_get_guint8(tvb, tvb_current_offset); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + + switch ( tempchar ){ + + case 'S': + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ','); + if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){ + tvb_offset = tvb_next_offset; + } + + tempchar = tvb_get_guint8(tvb, tvb_current_offset); + tokenlen = tvb_offset - tvb_current_offset; + + proto_tree_add_string(megaco_TerminationState_tree, hf_megaco_Service_State, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + break; + + case 'B': + + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ','); + if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){ + tvb_offset = tvb_next_offset; + } + + tempchar = tvb_get_guint8(tvb, tvb_current_offset); + tokenlen = tvb_offset - tvb_current_offset; + + proto_tree_add_string(megaco_TerminationState_tree, hf_megaco_Event_Buffer_Control, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + break; + + case 'E': + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ','); + if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){ + tvb_offset = tvb_next_offset; + } + + tempchar = tvb_get_guint8(tvb, tvb_current_offset); + tokenlen = tvb_offset - tvb_current_offset; + + proto_tree_add_string(megaco_TerminationState_tree, hf_megaco_Event_Buffer_Control, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + break; + + default: + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ','); + if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){ + tvb_offset = tvb_next_offset; + } + + tokenlen = tvb_offset - tvb_current_offset; + + proto_tree_add_text(megaco_TerminationState_tree, tvb, tvb_current_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_current_offset,tokenlen)); + break; + } + + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_next_offset, '='); + + } + proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_next_offset, 1, + "%s", tvb_format_text(tvb, tvb_next_offset, 1)); + +} + +static void +dissect_megaco_Localdescriptor(tvbuff_t *tvb, proto_tree *megaco_mediadescriptor_tree,packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset) +{ + gint tokenlen; + tvbuff_t *next_tvb; + + proto_tree *megaco_localdescriptor_tree, *megaco_localdescriptor_ti; + + tokenlen = 0; + + tokenlen = tvb_next_offset - tvb_current_offset; + + + /* + megaco_localdescriptor_ti = proto_tree_add_item(megaco_mediadescriptor_tree,hf_megaco_Local_descriptor,tvb,tvb_current_offset,tokenlen, FALSE); + */ + megaco_localdescriptor_ti = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_current_offset, tokenlen, + "%s", tvb_format_text(tvb, tvb_current_offset, tokenlen)); + megaco_localdescriptor_tree = proto_item_add_subtree(megaco_localdescriptor_ti, ett_megaco_Localdescriptor); + + tokenlen = tvb_next_offset - tvb_current_offset; + if ( tokenlen > 3 ){ + next_tvb = tvb_new_subset(tvb, tvb_current_offset, tokenlen, tokenlen); + call_dissector(sdp_handle, next_tvb, pinfo, megaco_localdescriptor_tree); + } +} + +/* + * localControlDescriptor = LocalControlToken LBRKT localParm + * *(COMMA localParm) RBRKT + * ; at-most-once per item + * localParm = ( streamMode / propertyParm / reservedValueMode / reservedGroupMode ) + */ + +#define MEGACO_MODETOKEN 1 +#define MEGACO_RESERVEDVALUETOKEN 2 +#define MEGACO_RESERVEDGROUPTOKEN 3 +#define MEGACO_H324_H223CAPR 4 +#define MEGACO_H324_MUXTBL_IN 5 +#define MEGACO_H324_MUXTBL_OUT 6 +#define MEGACO_DS_DSCP 7 +#define MEGACO_GM_SAF 8 +#define MEGACO_GM_SAM 9 +#define MEGACO_GM_SPF 10 +#define MEGACO_GM_SPR 11 +#define MEGACO_GM_ESAS 12 +#define MEGACO_GM_LSA 13 +#define MEGACO_GM_ESPS 14 +#define MEGACO_GM_LSP 15 +#define MEGACO_GM_RSB 16 + +static const megaco_tokens_t megaco_localParam_names[] = { + { "Unknown-token", NULL }, /* 0 Pad so that the real headers start at index 1 */ + /* streamMode */ + { "Mode", "MO" }, /* 1 */ + { "ReservedValue", "RV" }, /* 2 */ + { "ReservedGroup", "RG" }, /* 3 */ + /* propertyParm = pkgdName parmValue + * Add more package names as needed. + */ + { "h324/h223capr", NULL }, /* 4 */ + { "h324/muxtbl_in", NULL }, /* 5 */ + { "h324/muxtbl_out", NULL }, /* 6 */ + { "ds/dscp", NULL }, /* 7 */ + { "gm/saf", NULL }, /* 8 */ + { "gm/sam", NULL }, /* 9 */ + { "gm/spf", NULL }, /* 10 */ + { "gm/spr", NULL }, /* 11 */ + { "gm/esas", NULL }, /* 12 */ + { "gm/lsa", NULL }, /* 13 */ + { "gm/esps", NULL }, /* 14 */ + { "gm/lsp", NULL }, /* 15 */ + { "gm/rsb", NULL }, /* 16 */ +}; + +/* Returns index of megaco_tokens_t */ +static gint find_megaco_localParam_names(tvbuff_t *tvb, int offset, guint header_len) +{ + guint i; + + for (i = 1; i < array_length(megaco_localParam_names); i++) { + if (header_len == strlen(megaco_localParam_names[i].name) && + tvb_strncaseeql(tvb, offset, megaco_localParam_names[i].name, header_len) == 0) + return i; + if (megaco_localParam_names[i].compact_name != NULL && + header_len == strlen(megaco_localParam_names[i].compact_name) && + tvb_strncaseeql(tvb, offset, megaco_localParam_names[i].compact_name, header_len) == 0) + return i; + } + + return -1; +} + +static void +dissect_megaco_LocalControldescriptor(tvbuff_t *tvb, proto_tree *megaco_mediadescriptor_tree, packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset) +{ + gint tokenlen; + guint token_name_len; + gint tvb_offset,tvb_help_offset; + gint token_index = 0; + gchar *msg; + proto_item* item; + guint8 code_str[3]; + + /*proto_tree *megaco_LocalControl_tree, *megaco_LocalControl_ti; */ + + tokenlen = 0; + tvb_offset = 0; + tvb_help_offset = 0; + + + tokenlen = tvb_next_offset - tvb_current_offset; + /* + megaco_LocalControl_ti = proto_tree_add_item(megaco_mediadescriptor_tree,hf_megaco_LocalControl_descriptor,tvb,tvb_current_offset,tokenlen, FALSE); + megaco_LocalControl_tree = proto_item_add_subtree(megaco_LocalControl_ti, ett_megaco_LocalControldescriptor); + */ + while ( tvb_offset < tvb_next_offset && tvb_offset != -1 ){ + + tvb_help_offset = tvb_current_offset; + + /* + * Find local parameter name + * localParm = ( streamMode / propertyParm / reservedValueMode / reservedGroupMode ) + * pkgdName = (PackageName SLASH ItemID) ;specific item + * / (PackageName SLASH "*") ;all events in package + * / ("*" SLASH "*") ; all events supported by the MG + */ + /* Find token length */ + for (tvb_offset=tvb_current_offset; tvb_offset < tvb_next_offset; tvb_offset++){ + guint8 octet; + octet = tvb_get_guint8(tvb, tvb_offset); + if (!isalnum(octet)){ + if ((octet!='/')&&(octet!='_')){ + break; + } + } + } + token_name_len = tvb_offset - tvb_current_offset; + /* Debug Code + proto_tree_add_text(megaco_LocalControl_tree, tvb, tvb_current_offset, token_name_len, + "%s", tvb_format_text(tvb,tvb_current_offset,token_name_len)); + + */ + token_index = find_megaco_localParam_names(tvb, tvb_current_offset, token_name_len); + /* Find start of parameter value */ + tvb_offset = tvb_find_guint8(tvb, tvb_offset , tvb_next_offset, '='); + if (tvb_offset == -1) + THROW(ReportedBoundsError); + /* Start search after '=' in case there is no SP*/ + tvb_offset++; + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset); + + /* find if there are more parameters or not */ + tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ','); + if ( tvb_offset < 0 || tvb_offset > tvb_next_offset ){ + tvb_offset = tvb_next_offset; + } + + tokenlen = tvb_skip_wsp_return(tvb,tvb_offset-1) - tvb_current_offset; + /* Debug Code + proto_tree_add_text(megaco_LocalControl_tree, tvb, tvb_current_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_current_offset,tokenlen)); + + */ + switch ( token_index ){ + + case MEGACO_MODETOKEN: /* Mode */ + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_mode, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + if (check_col(pinfo->cinfo, COL_INFO) ) + col_append_fstr(pinfo->cinfo, COL_INFO, " (Mode:%s)",tvb_format_text(tvb, tvb_current_offset,tokenlen)); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + + case MEGACO_RESERVEDVALUETOKEN: /* ReservedValue */ + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_reserve_value, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + case MEGACO_RESERVEDGROUPTOKEN: /* ReservedGroup */ + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_reserve_group, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + + case MEGACO_H324_H223CAPR: /* h324/h223capr */ + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_h324_h223capr, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + tokenlen = tvb_offset - tvb_help_offset; + msg=tvb_format_text(tvb,tvb_help_offset, tokenlen); + dissect_megaco_h324_h223caprn(tvb, pinfo, megaco_mediadescriptor_tree, tvb_help_offset, tokenlen, msg); + + break; + + case MEGACO_H324_MUXTBL_IN: /* h324/muxtbl_in */ + + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_h324_muxtbl_in, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + + tokenlen = tvb_offset - tvb_help_offset; + msg=tvb_format_text(tvb,tvb_help_offset, tokenlen); + /* Call the existing rotine with tree = NULL to avoid an entry to the tree */ + dissect_megaco_h245(tvb, pinfo, NULL, tvb_help_offset, tokenlen, msg); + + break; + + case MEGACO_H324_MUXTBL_OUT: + + proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_h324_muxtbl_out, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + + tokenlen = tvb_offset - tvb_help_offset; + msg=tvb_format_text(tvb,tvb_help_offset, tokenlen); + /* Call the existing rotine with tree = NULL to avoid an entry to the tree */ + dissect_megaco_h245(tvb, pinfo, NULL, tvb_help_offset, tokenlen, msg); + + break; + + case MEGACO_DS_DSCP: + item = proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_ds_dscp, tvb, + tvb_current_offset, tokenlen, + tvb_format_text(tvb, tvb_current_offset, + tokenlen)); + + tvb_get_nstringz0(tvb,tvb_current_offset,3,code_str); + proto_item_append_text(item,"[ %s ]", val_to_str(strtoul((gchar*)code_str,NULL,16), dscp_vals,"Unknown (%u)")); + + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + + case MEGACO_GM_SAF: + tokenlen = tvb_offset - tvb_help_offset; + item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_help_offset, + tokenlen)); + proto_item_append_text(item," [Remote Source Address Filtering]"); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + case MEGACO_GM_SAM: + tokenlen = tvb_offset - tvb_help_offset; + item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_help_offset, + tokenlen)); + proto_item_append_text(item," [Remote Source Address Mask]"); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + case MEGACO_GM_SPF: + tokenlen = tvb_offset - tvb_help_offset; + item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_help_offset, + tokenlen)); + proto_item_append_text(item," [Remote Source Port Filtering]"); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + case MEGACO_GM_SPR: + tokenlen = tvb_offset - tvb_help_offset; + item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_help_offset, + tokenlen)); + proto_item_append_text(item," [Remote Source Port Range]"); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + case MEGACO_GM_ESAS: + tokenlen = tvb_offset - tvb_help_offset; + item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_help_offset, + tokenlen)); + proto_item_append_text(item," [Explicit Source Address Setting]"); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + break; + default: + tokenlen = tvb_offset - tvb_help_offset; + proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen, + "%s", tvb_format_text(tvb,tvb_help_offset, + tokenlen)); + tvb_current_offset = tvb_skip_wsp(tvb, tvb_offset +1); + + break; + } + } +} +/* Copied from MGCP dissector, prints whole message in raw text */ + +static void tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree){ + + gint tvb_linebegin,tvb_lineend,tvb_len,linelen; + + tvb_linebegin = 0; + tvb_len = tvb_length(tvb); + + proto_tree_add_text(tree, tvb, 0, -1,"-------------- (RAW text output) ---------------"); + + do { + linelen = tvb_find_line_end(tvb,tvb_linebegin,-1,&tvb_lineend,FALSE); + proto_tree_add_text(tree, tvb, tvb_linebegin, linelen, + "%s", tvb_format_text_wsp(tvb,tvb_linebegin, + linelen)); + tvb_linebegin = tvb_lineend; + } while ( tvb_lineend < tvb_len ); +} + +/* Register all the bits needed with the filtering engine */ + +void +proto_register_megaco(void) +{ + static hf_register_info hf[] = { + { &hf_megaco_audit_descriptor, + { "Audit Descriptor", "megaco.audit", FT_STRING, BASE_DEC, NULL, 0x0, + "Audit Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_command_line, + { "Command line", "megaco.command_line", FT_STRING, BASE_DEC, NULL, 0x0, + "Commands of this message ", HFILL }}, + { &hf_megaco_command, + { "Command", "megaco.command", FT_STRING, BASE_DEC, NULL, 0x0, + "Command of this message ", HFILL }}, + { &hf_megaco_Context, + { "Context", "megaco.context", FT_STRING, BASE_DEC, NULL, 0x0, + "Context ID of this massage ", HFILL }}, + { &hf_megaco_digitmap_descriptor, + { "DigitMap Descriptor", "megaco.digitmap", FT_STRING, BASE_DEC, NULL, 0x0, + "DigitMap Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_error_descriptor, + { "ERROR Descriptor", "megaco.error", FT_STRING, BASE_DEC, NULL, 0x0, + "Error Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_error_Frame, + { "ERROR frame", "megaco.error_frame", FT_STRING, BASE_DEC, NULL, 0x0, + "Syntax error ", HFILL }}, + { &hf_megaco_Event_Buffer_Control, + { "Event Buffer Control", "megaco.eventbuffercontrol", FT_STRING, BASE_DEC, NULL, 0x0, + "Event Buffer Control in Termination State Descriptor", HFILL }}, + { &hf_megaco_events_descriptor, + { "Events Descriptor", "megaco.events", FT_STRING, BASE_DEC, NULL, 0x0, + "Events Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_Local_descriptor, + { "Local Descriptor", "megaco.localdescriptor", FT_STRING, BASE_DEC, NULL, 0x0, + "Local Descriptor in Media Descriptor ", HFILL }}, + { &hf_megaco_LocalControl_descriptor, + { "Local Control Descriptor", "megaco.localcontroldescriptor", FT_STRING, BASE_DEC, NULL, 0x0, + "Local Control Descriptor in Media Descriptor ", HFILL }}, + { &hf_megaco_media_descriptor, + { "Media Descriptor", "megaco.media", FT_STRING, BASE_DEC, NULL, 0x0, + "Media Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_modem_descriptor, + { "Modem Descriptor", "megaco.modem", FT_STRING, BASE_DEC, NULL, 0x0, + "Modem Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_mode, + { "Mode", "megaco.mode", FT_STRING, BASE_DEC, NULL, 0x0, + "Mode sendonly/receiveonly/inactive/loopback", HFILL }}, + { &hf_megaco_multiplex_descriptor, + { "Multiplex Descriptor", "megaco.multiplex", FT_STRING, BASE_DEC, NULL, 0x0, + "Multiplex Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_observedevents_descriptor, + { "Observed Events Descriptor", "megaco.observedevents", FT_STRING, BASE_DEC, NULL, 0x0, + "Observed Events Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_packages_descriptor, + { "Packages Descriptor", "megaco.packagesdescriptor", FT_STRING, BASE_DEC, NULL, 0x0, + "Packages Descriptor", HFILL }}, + { &hf_megaco_pkgdname, + { "pkgdName", "megaco.pkgdname", FT_STRING, BASE_DEC, NULL, 0x0, + "PackageName SLASH ItemID", HFILL }}, + { &hf_megaco_Remote_descriptor, + { "Remote Descriptor", "megaco.remotedescriptor", FT_STRING, BASE_DEC, NULL, 0x0, + "Remote Descriptor in Media Descriptor ", HFILL }}, + { &hf_megaco_reserve_group, + { "Reserve Group", "megaco.reservegroup", FT_STRING, BASE_DEC, NULL, 0x0, + "Reserve Group on or off", HFILL }}, + { &hf_megaco_h324_muxtbl_in, + { "h324/muxtbl_in", "megaco.h324_muxtbl_in", FT_STRING, BASE_DEC, NULL, 0x0, + "h324/muxtbl_in", HFILL }}, + { &hf_megaco_h324_muxtbl_out, + { "h324/muxtbl_out", "megaco.h324_muxtbl_out", FT_STRING, BASE_DEC, NULL, 0x0, + "h324/muxtbl_out", HFILL }}, + { &hf_megaco_ds_dscp, + { "ds/dscp", "megaco.ds_dscp", FT_STRING, BASE_DEC, NULL, 0x0, + "ds/dscp Differentiated Services Code Point", HFILL }}, + { &hf_megaco_h324_h223capr, + { "h324/h223capr", "megaco._h324_h223capr", FT_STRING, BASE_DEC, NULL, 0x0, + "h324/h223capr", HFILL }}, + { &hf_megaco_reserve_value, + { "Reserve Value", "megaco.reservevalue", FT_STRING, BASE_DEC, NULL, 0x0, + "Reserve Value on or off", HFILL }}, + { &hf_megaco_requestid, + { "RequestID", "megaco.requestid", FT_STRING, BASE_DEC, NULL, 0x0, + "RequestID in Events or Observedevents Descriptor ", HFILL }}, + { &hf_megaco_servicechange_descriptor, + { "Service Change Descriptor", "megaco.servicechange", FT_STRING, BASE_DEC, NULL, 0x0, + "Service Change Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_Service_State, + { "Service State", "megaco.servicestates", FT_STRING, BASE_DEC, NULL, 0x0, + "Service States in Termination State Descriptor", HFILL }}, + { &hf_megaco_signal_descriptor, + { "Signal Descriptor", "megaco.signal", FT_STRING, BASE_DEC, NULL, 0x0, + "Signal Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_statistics_descriptor, + { "Statistics Descriptor", "megaco.statistics", FT_STRING, BASE_DEC, NULL, 0x0, + "Statistics Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_streamid, + { "StreamID", "megaco.streamid", FT_STRING, BASE_DEC, NULL, 0x0, + "StreamID in the Media Descriptor ", HFILL }}, + { &hf_megaco_termid, + { "Termination ID", "megaco.termid", FT_STRING, BASE_DEC, NULL, 0x0, + "Termination ID of this Command ", HFILL }}, + { &hf_megaco_TerminationState_descriptor, + { "Termination State Descriptor", "megaco.terminationstate", FT_STRING, BASE_DEC, NULL, 0x0, + "Termination State Descriptor in Media Descriptor ", HFILL }}, + { &hf_megaco_topology_descriptor, + { "Topology Descriptor", "megaco.topology", FT_STRING, BASE_DEC, NULL, 0x0, + "Topology Descriptor of the megaco Command ", HFILL }}, + { &hf_megaco_transaction, + { "Transaction", "megaco.transaction", FT_STRING, BASE_DEC, NULL, 0x0, + "Message Originator", HFILL }}, + { &hf_megaco_transid, + { "Transaction ID", "megaco.transid", FT_STRING, BASE_DEC, NULL, 0x0, + "Transaction ID of this message", HFILL }}, + { &hf_megaco_mId, + { "MediagatewayID", "megaco.mId", FT_STRING, BASE_DEC, NULL, 0x0, + "Mediagateway ID", HFILL }}, + { &hf_megaco_version, + { "Version", "megaco.version", FT_STRING, BASE_DEC, NULL, 0x0, + "Version", HFILL }}, + { &hf_megaco_h245, + { "h245", "megaco.h245", FT_STRING, BASE_DEC, NULL, 0x0, + "Embedded H.245 message", HFILL }}, + { &hf_megaco_h223Capability, + { "h223Capability", "megaco.h245.h223Capability", + FT_NONE, BASE_NONE, NULL, 0, + "megaco.h245.H223Capability", HFILL }}, + + + /* Add more fields here */ + }; + static gint *ett[] = { + &ett_megaco, + &ett_megaco_message, + &ett_megaco_message_body, + &ett_megaco_context, + &ett_megaco_command_line, + &ett_megaco_descriptors, + &ett_megaco_mediadescriptor, + &ett_megaco_TerminationState, + &ett_megaco_Remotedescriptor, + &ett_megaco_Localdescriptor, + &ett_megaco_LocalControldescriptor, + &ett_megaco_auditdescriptor, + &ett_megaco_eventsdescriptor, + &ett_megaco_observedeventsdescriptor, + &ett_megaco_observedevent, + &ett_megaco_packagesdescriptor, + &ett_megaco_requestedevent, + &ett_megaco_signalsdescriptor, + &ett_megaco_requestedsignal, + &ett_megaco_h245, + }; + module_t *megaco_module; + + proto_megaco = proto_register_protocol("MEGACO", + "MEGACO", "megaco"); + + register_dissector("megaco", dissect_megaco_text, proto_megaco); + + proto_register_field_array(proto_megaco, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + /* Register our configuration options, particularly our ports */ + + megaco_module = prefs_register_protocol(proto_megaco, proto_reg_handoff_megaco); + + prefs_register_uint_preference(megaco_module, "tcp.txt_port", + "MEGACO Text TCP Port", + "Set the TCP port for MEGACO text messages", + 10, &global_megaco_txt_tcp_port); + + prefs_register_uint_preference(megaco_module, "udp.txt_port", + "MEGACO Text UDP Port", + "Set the UDP port for MEGACO text messages", + 10, &global_megaco_txt_udp_port); + +#if 0 + prefs_register_uint_preference(megaco_module, "tcp.bin_port", + "MEGACO Binary TCP Port", + "Set the TCP port for MEGACO binary messages", + 10, &global_megaco_bin_tcp_port); + + prefs_register_uint_preference(megaco_module, "udp.bin_port", + "MEGACO Binary UDP Port", + "Set the UDP port for MEGACO binary messages", + 10, &global_megaco_bin_udp_port); +#endif + + prefs_register_bool_preference(megaco_module, "display_raw_text", + "Display raw text for MEGACO message", + "Specifies that the raw text of the " + "MEGACO message should be displayed " + "instead of (or in addition to) the " + "dissection tree", + &global_megaco_raw_text); + + prefs_register_bool_preference(megaco_module, "display_dissect_tree", + "Display tree dissection for MEGACO message", + "Specifies that the dissection tree of the " + "MEGACO message should be displayed " + "instead of (or in addition to) the " + "raw text", + &global_megaco_dissect_tree); +} + + + + +/* The registration hand-off routine */ +void +proto_reg_handoff_megaco(void) +{ + static int megaco_prefs_initialized = FALSE; + static dissector_handle_t megaco_text_tcp_handle; + + sdp_handle = find_dissector("sdp"); + h245_handle = find_dissector("h245dg"); + h248_handle = find_dissector("h248"); + + if (!megaco_prefs_initialized) { + megaco_text_handle = create_dissector_handle(dissect_megaco_text, + proto_megaco); + megaco_text_tcp_handle = create_dissector_handle(dissect_megaco_text_tcp, + proto_megaco); + + megaco_prefs_initialized = TRUE; + } + else { + dissector_delete("tcp.port", txt_tcp_port, megaco_text_tcp_handle); + dissector_delete("udp.port", txt_udp_port, megaco_text_handle); +#if 0 + dissector_delete("tcp.port", bin_tcp_port, megaco_text_tcp_handle); + dissector_delete("udp.port", bin_udp_port, megaco_bin_handle); +#endif + } + + /* Set our port number for future use */ + + txt_tcp_port = global_megaco_txt_tcp_port; + txt_udp_port = global_megaco_txt_udp_port; + +#if 0 + bin_tcp_port = global_megaco_bin_tcp_port; + bin_udp_port = global_megaco_bin_udp_port; +#endif + + dissector_add("tcp.port", global_megaco_txt_tcp_port, megaco_text_tcp_handle); + dissector_add("udp.port", global_megaco_txt_udp_port, megaco_text_handle); +#if 0 + dissector_add("tcp.port", global_megaco_bin_tcp_port, megaco_bin_handle); + dissector_add("udp.port", global_megaco_bin_udp_port, megaco_bin_handle); +#endif + /* XXX - text or binary? Does that depend on the port number? */ + dissector_add("sctp.ppi", H248_PAYLOAD_PROTOCOL_ID, megaco_text_handle); + +} + +/* +* tvb_skip_wsp - Returns the position in tvb of the first non-whitespace +* character following offset or offset + maxlength -1 whichever +* is smaller. +* +* Parameters: +* tvb - The tvbuff in which we are skipping whitespaces, tab and end_of_line characters. +* offset - The offset in tvb from which we begin trying to skip whitespace. +* +* Returns: The position in tvb of the first non-whitespace +*/ +static gint tvb_skip_wsp(tvbuff_t* tvb, gint offset ){ + gint counter = offset; + gint end,tvb_len; + guint8 tempchar; + tvb_len = tvb_length(tvb); + end = tvb_len; + + for(counter = offset; counter < end && + ((tempchar = tvb_get_guint8(tvb,counter)) == ' ' || + tempchar == '\t' || tempchar == '\n' || tempchar == '\r'); counter++); + return (counter); +} +static gint tvb_skip_wsp_return(tvbuff_t* tvb, gint offset){ + gint counter = offset; + gint end; + guint8 tempchar; + end = 0; + + for(counter = offset; counter > end && + ((tempchar = tvb_get_guint8(tvb,counter)) == ' ' || + tempchar == '\t' || tempchar == '\n' || tempchar == '\r'); counter--); + counter++; + return (counter); +} |