/* msg_dsc.c * WiMax MAC Management DSC-REQ/RSP/ACK Messages decoder * * Copyright (c) 2007 by Intel Corporation. * * Author: Lu Pan * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * 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. */ /* Include files */ #ifdef HAVE_CONFIG_H #include "config.h" #endif /* #define DEBUG */ #include #include #include "wimax_tlv.h" #include "wimax_mac.h" #include "wimax_utils.h" extern gint proto_mac_mgmt_msg_dsa_decoder; static gint proto_mac_mgmt_msg_dsc_decoder = -1; static gint ett_mac_mgmt_msg_dsc_req_decoder = -1; static gint ett_mac_mgmt_msg_dsc_rsp_decoder = -1; static gint ett_mac_mgmt_msg_dsc_ack_decoder = -1; static const value_string vals_dsc_msgs[] = { { MAC_MGMT_MSG_DSC_REQ, "Dynamic Service Change Request (DSC-REQ)" }, { MAC_MGMT_MSG_DSC_RSP, "Dynamic Service Change Response (DSC-RSP)" }, { MAC_MGMT_MSG_DSC_ACK, "Dynamic Service Change Acknowledge (DSC-ACK)" }, { 0, NULL } }; /* fix fields */ static gint hf_dsc_req_message_type = -1; static gint hf_dsc_transaction_id = -1; static gint hf_dsc_rsp_message_type = -1; static gint hf_dsc_confirmation_code = -1; static gint hf_dsc_ack_message_type = -1; void dissect_mac_mgmt_msg_dsc_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint offset = 0; guint tvb_len, payload_type; proto_item *dsc_item = NULL; proto_tree *dsc_tree = NULL; if(tree) { /* we are being asked for details */ /* get the message type */ payload_type = tvb_get_guint8(tvb, offset); /* ensure the message type is DSC REQ/RSP/ACK */ if(payload_type != MAC_MGMT_MSG_DSC_REQ) return; /* Get the tvb reported length */ tvb_len = tvb_reported_length(tvb); /* display MAC message type */ dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len, "%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len); /* add MAC DSx subtree */ dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_req_decoder); /* Decode and display the Uplink Channel Descriptor (UCD) */ /* display the Message Type */ proto_tree_add_item(dsc_tree, hf_dsc_req_message_type, tvb, offset, 1, ENC_BIG_ENDIAN); /* move to next field */ offset++; /* display the Transaction ID */ proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN); /* move to next field */ offset += 2; /* process DSC REQ message TLV Encode Information */ wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree); } } void dissect_mac_mgmt_msg_dsc_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint offset = 0; guint tvb_len, payload_type; proto_item *dsc_item = NULL; proto_tree *dsc_tree = NULL; if(tree) { /* we are being asked for details */ /* get the message type */ payload_type = tvb_get_guint8(tvb, offset); /* ensure the message type is DSC REQ/RSP/ACK */ if(payload_type != MAC_MGMT_MSG_DSC_RSP) return; /* Get the tvb reported length */ tvb_len = tvb_reported_length(tvb); /* display MAC message type */ dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len, "%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len); /* add MAC DSx subtree */ dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_rsp_decoder); /* Decode and display the Uplink Channel Descriptor (UCD) */ /* display the Message Type */ proto_tree_add_item(dsc_tree, hf_dsc_rsp_message_type, tvb, offset, 1, ENC_BIG_ENDIAN); /* move to next field */ offset++; /* display the Transaction ID */ proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN); /* move to next field */ offset += 2; /* display the Confirmation Code */ proto_tree_add_item(dsc_tree, hf_dsc_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN); /* move to next field */ offset++; /* process DSC RSP message TLV Encode Information */ wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree); } } void dissect_mac_mgmt_msg_dsc_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint offset = 0; guint tvb_len, payload_type; proto_item *dsc_item = NULL; proto_tree *dsc_tree = NULL; if(tree) { /* we are being asked for details */ /* get the message type */ payload_type = tvb_get_guint8(tvb, offset); /* ensure the message type is DSC REQ/RSP/ACK */ if((payload_type < MAC_MGMT_MSG_DSC_REQ) || (payload_type > MAC_MGMT_MSG_DSC_ACK)) return; /* Get the tvb reported length */ tvb_len = tvb_reported_length(tvb); /* display MAC message type */ dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len, "%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len); /* add MAC DSx subtree */ dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_ack_decoder); /* Decode and display the Uplink Channel Descriptor (UCD) */ /* display the Message Type */ proto_tree_add_item(dsc_tree, hf_dsc_ack_message_type, tvb, offset, 1, ENC_BIG_ENDIAN); /* move to next field */ offset++; /* display the Transaction ID */ proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN); /* move to next field */ offset += 2; /* display the Confirmation Code */ proto_tree_add_item(dsc_tree, hf_dsc_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN); /* move to next field */ offset++; /* process DSC ACK message TLV Encode Information */ wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree); } } /* Register Wimax Mac Payload Protocol and Dissector */ void proto_register_mac_mgmt_msg_dsc(void) { /* DSx display */ static hf_register_info hf[] = { { &hf_dsc_ack_message_type, { "MAC Management Message Type", "wmx.macmgtmsgtype.dsc_ack", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_dsc_req_message_type, { "MAC Management Message Type", "wmx.macmgtmsgtype.dsc_req", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_dsc_rsp_message_type, { "MAC Management Message Type", "wmx.macmgtmsgtype.dsc_rsp", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_dsc_confirmation_code, { "Confirmation code", "wmx.dsc.confirmation_code", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_dsc_transaction_id, { "Transaction ID", "wmx.dsc.transaction_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } } }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_mac_mgmt_msg_dsc_req_decoder, &ett_mac_mgmt_msg_dsc_rsp_decoder, &ett_mac_mgmt_msg_dsc_ack_decoder }; proto_mac_mgmt_msg_dsc_decoder = proto_mac_mgmt_msg_dsa_decoder; proto_register_field_array(proto_mac_mgmt_msg_dsc_decoder, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); }