forked from osmocom/wireshark
965 lines
31 KiB
C
965 lines
31 KiB
C
/* packet-a21.c
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*
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* Routines for A21/s102 Message dissection
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* Copyright 2012, Joseph Chai <chaienzhao@gmail.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Ref: 3GPP2 A.S0008-C v4.0
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/expert.h>
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#include "packet-e212.h"
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#include "packet-a21.h"
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void proto_register_a21(void);
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void proto_reg_handoff_a21(void);
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#define A21_PORT 23272
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static dissector_handle_t gcsna_handle = NULL;
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static int proto_a21 = -1;
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static int hf_a21_message_type = -1;
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static int hf_a21_corr_id = -1;
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static int hf_a21_element_identifier = -1;
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static int hf_a21_element_length = -1;
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static int hf_a21_corr_id_corr_value = -1;
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static int hf_a21_mn_id_msid_value = -1;
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static int hf_a21_mn_id_odd_even_indicator = -1;
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static int hf_a21_mn_id_type_of_identity = -1;
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static int hf_a21_mn_id_esn = -1;
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static int hf_a21_mn_id_identity_digit_1 = -1;
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static int hf_a21_gcsna_pdu_length = -1;
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static int hf_a21_gcsna_content = -1;
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static int hf_a21_reference_cell_id_cell = -1;
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static int hf_a21_reference_cell_id_sector = -1;
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static int hf_a21_mob_sub_info_record_id = -1;
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static int hf_a21_mob_sub_info_record_length = -1;
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static int hf_a21_mob_sub_info_record_content = -1;
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static int hf_a21_mob_sub_info_re_con_all_band_inc = -1;
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static int hf_a21_mob_sub_info_re_con_curr_band_sub = -1;
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static int hf_a21_mob_sub_info_re_band_class = -1;
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static int hf_a21_mob_sub_info_re_con_all_sub_band_inc = -1;
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static int hf_a21_mob_sub_info_re_sub_cls_len = -1;
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/*
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static int hf_a21_mob_sub_info_re_con_band_class = -1;
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*/
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static int hf_a21_auth_chall_para_rand_num_type = -1;
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static int hf_a21_auth_chall_para_rand_value = -1;
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static int hf_a21_service_option = -1;
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static int hf_a21_gcsna_status_reserved = -1;
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static int hf_a21_gcsna_status_priority_incl = -1;
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static int hf_a21_gcsna_status_gec = -1;
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static int hf_a21_gcsna_status_status_incl = -1;
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static int hf_a21_gcsna_status = -1;
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static int hf_a21_gcsna_status_call_priority = -1;
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static int hf_a21_3G1X_parameters = -1;
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static int hf_a21_reserved = -1;
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static int hf_a21_msg_tran_ctrl_paging_msg = -1;
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static int hf_a21_msg_tran_ctrl_simul_xmit_with_next = -1;
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static int hf_a21_msg_tran_ctrl_ackrequired = -1;
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static int hf_a21_msg_tran_ctrl_3GXLogicalChannel = -1;
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static int hf_a21_msg_tran_ctrl_protocol_revision = -1;
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static int hf_a21_1x_lac_en_pdu = -1;
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static int hf_a21_pilot_list_num_of_pilots = -1;
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static int hf_a21_pilot_list_value = -1;
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static int hf_a21_cause_value = -1;
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static int hf_a21_mscid_market_id = -1;
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static int hf_a21_mscid_switch_number = -1;
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static int hf_a21_event = -1;
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static int hf_a21_additional_event_info = -1;
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static int hf_a21_allowed_forward_link_message = -1;
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static gint ett_a21 = -1;
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static gint ett_a21_ie = -1;
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static gint ett_a21_corr_id = -1;
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static gint ett_a21_record_content = -1;
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static expert_field ei_a21_ie_data_not_dissected_yet = EI_INIT;
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static const value_string a21_message_type_vals[] = {
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{0x01, "A21-1x Air Interface Signalling"}, /* 01H */
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{0x02, "A21-Ack"}, /* 02H */
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{0x03, "A21-1x Parameters"}, /* 03H */
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{0x04, "A21-Event Notification"}, /* 04H */
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{0x05, "A21-1x Parameters Request"}, /* 05H */
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{0x06, "A21-Service Request"}, /* 06H */
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{0x07, "A21-Service Response"}, /* 07H */
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{0x08, "A21-Radio Update Request"}, /* 08H */
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{0x09, "A21-Radio Update Response"}, /* 09H */
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{0, NULL}
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};
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#define A21_IEI_1X_LAC_ENCAPSULATED_PDU 0x01 /* 01H */
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#define A21_IEI_A21_1X_PARAMETERS 0x02 /* 02H */
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#define A21_IEI_PILOT_LIST 0x03 /* 03H */
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#define A21_IEI_CORRELATION_ID 0x04 /* 04H */
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#define A21_IEI_MOBILE_IDENTITY 0x05 /* 05H */
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#define A21_IEI_AUTHENTICATION_CHALLENGE_PARAMETER 0x06 /* 06H */
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#define A21_IEI_A21_1X_MESSAGE_TRANSMISSION_CONTROL 0x07 /* 07H */
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#define A21_IEI_A21_CAUSE 0x08 /* 08H */
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#define A21_IEI_A21_EVENT 0x09 /* 09H */
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#define A21_IEI_SERVICE_OPTION 0x0A /* 0AH */
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#define A21_IEI_A21_MOBILE_SUBSCRIPTION_INFORMATION 0x0B /* 0BH */
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#define A21_IEI_GCSNA_STATUS 0x0C /* 0CH */
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#define A21_IEI_GCSNA_PDU 0xC0 /* C0H */
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#define A21_IEI_REFERENCE_CELL_ID 0x0D /* 0DH */
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/*(Reserved range of IEIs for S102) 30H-3FH */
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static void
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dissect_a21_correlation_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
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{
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int offset = 0;
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proto_item *tc;
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proto_tree *corr_tree;
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if (tree == NULL)
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return;
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tc = proto_tree_add_item(tree, hf_a21_corr_id, tvb, offset, 6, ENC_BIG_ENDIAN);
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corr_tree = proto_item_add_subtree(tc,ett_a21_corr_id);
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proto_tree_add_item(corr_tree, hf_a21_element_identifier, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(corr_tree, hf_a21_element_length, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(corr_tree, hf_a21_corr_id_corr_value, tvb, offset, 4, ENC_BIG_ENDIAN);
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/* offset += 4; */
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}
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static const value_string a21_mn_id_type_of_identity_vals[] = {
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{ 0, "No Identity Code" },
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{ 1, "MEID" },
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{ 5, "ESN" },
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{ 6, "IMSI" },
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{ 0, NULL }
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};
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/* 5.2.4.8 Mobile Identity (MN ID) */
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static void
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dissect_a21_mobile_identity(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *item, guint16 length, guint8 message_type _U_)
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{
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int offset = 0;
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guint identity_type;
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const gchar *imsi_str;
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if (tree == NULL)
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return;
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identity_type = tvb_get_guint8(tvb, offset) & 0x07;
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proto_tree_add_item(tree, hf_a21_mn_id_type_of_identity, tvb, offset, 1, ENC_BIG_ENDIAN);
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switch (identity_type) {
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case 0:
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/* No Identity Code */
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proto_tree_add_item(tree, hf_a21_mn_id_msid_value, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* offset++; */
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break;
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case 1:
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/* MEID */
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proto_tree_add_item(tree, hf_a21_mn_id_odd_even_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* offset++; */
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break;
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case 5:
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/* ESN */
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proto_tree_add_item(tree, hf_a21_mn_id_odd_even_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_mn_id_identity_digit_1, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(tree, hf_a21_mn_id_esn, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* offset++; */
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break;
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case 6:
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/* IMSI */
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proto_tree_add_item(tree, hf_a21_mn_id_odd_even_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
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imsi_str = dissect_e212_imsi(tvb, pinfo, tree, offset, length, TRUE);
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proto_item_append_text(item, "%s", imsi_str);
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break;
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}
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}
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static void
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dissect_a21_1x_message_transmission_control(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
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{
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int offset = 0;
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if (tree == NULL)
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return;
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proto_tree_add_item(tree, hf_a21_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_msg_tran_ctrl_paging_msg, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_msg_tran_ctrl_simul_xmit_with_next, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_msg_tran_ctrl_ackrequired, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_msg_tran_ctrl_3GXLogicalChannel, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(tree, hf_a21_msg_tran_ctrl_protocol_revision, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* offset++; */
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}
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static void
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dissect_a21_1x_lac_encapsulated_pdu(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
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{
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int offset = 0;
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proto_tree_add_item(tree, hf_a21_1x_lac_en_pdu, tvb, offset, 3, ENC_BIG_ENDIAN);
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/* offset += 3; */
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}
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/* 5.2.4.5 A21 1x Parameters */
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static void
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dissect_a21_1x_parameters(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_)
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{
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proto_tree_add_item(tree, hf_a21_3G1X_parameters, tvb, 0,length, ENC_NA);
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}
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static void
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dissect_a21_pilot_list(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_)
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{
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int offset = 0;
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guint8 num;
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num = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(tree, hf_a21_pilot_list_num_of_pilots, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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if (num>0) {
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proto_tree_add_item(tree, hf_a21_pilot_list_value, tvb, offset, length-1, ENC_NA);
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/* offset += (length-1); */
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}
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}
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static const range_string a21_random_number_type_rvals[] = {
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{0x00, 0x00, "Reserved"},
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{0x01, 0x01, "RAND"},
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{0x02, 0x0F, "Reserved"},
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{0, 0, NULL}
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};
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static void
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dissect_a21_authentication_challenge_parameter(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
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{
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int offset = 0;
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guint type;
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if (tree == NULL)
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return;
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type = tvb_get_guint8(tvb, offset) & 0x0f;
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proto_tree_add_item(tree, hf_a21_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_auth_chall_para_rand_num_type, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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switch (type) {
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case 1:
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proto_tree_add_item(tree, hf_a21_auth_chall_para_rand_value, tvb, offset, 4, ENC_BIG_ENDIAN);
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/*offset += 4;*/
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break;
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}
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}
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/* 5.2.4.14 A21 Mobile Subscription Information */
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static const value_string a21_record_identifier_vals[] = {
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{0x00, "Band Class/Band Subclass Record"},
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/* All other values are reserved */
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{0, NULL}
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};
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static void
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dissect_a21_mobile_subscription_information(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_)
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{
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int offset = 0;
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int i = 0;
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guint8 record_id;
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guint16 record_len = 0;
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proto_tree *record_tree;
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if (tree == NULL)
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return;
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while (offset<length) {
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record_id = tvb_get_guint8(tvb, offset);
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record_len = tvb_get_guint8(tvb, offset+1);
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record_tree = proto_tree_add_subtree_format(tree, tvb, offset+2, record_len,
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ett_a21_record_content, NULL, "Record %u",i+1);
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_record_id, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_record_length, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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if (record_id == 0) {
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_re_con_all_band_inc, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_re_con_curr_band_sub, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_re_band_class, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_re_con_all_sub_band_inc, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_re_sub_cls_len, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += record_len-2;
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} else {
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proto_tree_add_item(record_tree, hf_a21_mob_sub_info_record_content, tvb, offset, record_len, ENC_NA);
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offset += record_len;
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}
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}
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}
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static const value_string a21_gcsna_status_vals[] = {
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{0x01, "Handoff successful"},
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{0x02, "Handoff failure"},
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/* All other values are reserved */
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{0, NULL}
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};
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static void
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dissect_a21_gcsna_status(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
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{
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int offset = 0;
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guint8 priority_incl, status_incl;
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if (tree == NULL)
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return;
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status_incl = tvb_get_guint8(tvb, offset) & 0x01;
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priority_incl = tvb_get_guint8(tvb, offset) & 0x04;
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proto_tree_add_item(tree, hf_a21_gcsna_status_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_gcsna_status_priority_incl, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_gcsna_status_gec, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_gcsna_status_status_incl, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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if (status_incl == 1) {
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proto_tree_add_item(tree, hf_a21_gcsna_status, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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}
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if (priority_incl == 1) {
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proto_tree_add_item(tree, hf_a21_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_a21_gcsna_status_call_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
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}
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}
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/* 5.2.4.16 GCSNA PDU */
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static void
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dissect_a21_gcsna_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *top_tree, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_)
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{
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int offset = 0;
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proto_tree_add_item(tree, hf_a21_gcsna_content, tvb, offset, length, ENC_NA);
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if (gcsna_handle) {
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tvbuff_t *new_tvb;
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new_tvb = tvb_new_subset_length(tvb, offset, length);
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/* call the dissector with the parent (top)tree */
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call_dissector(gcsna_handle, new_tvb, pinfo, top_tree);
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}
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|
}
|
|
|
|
/* 5.2.4.17 Reference Cell ID */
|
|
static void
|
|
dissect_a21_reference_cell_id(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
|
|
{
|
|
int offset = 0;
|
|
|
|
if (tree == NULL)
|
|
return;
|
|
proto_tree_add_item(tree, hf_a21_mscid_market_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_a21_mscid_switch_number, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(tree, hf_a21_reference_cell_id_cell, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
proto_tree_add_item(tree, hf_a21_reference_cell_id_sector, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/* offset++; */
|
|
|
|
}
|
|
|
|
static const value_string a21_cause_vals[] = {
|
|
{0x00, "Unknown mobile"},
|
|
{0x01, "Unknown cell identifier(s)"},
|
|
{0x02, "Tunneling of 1x messages not available"},
|
|
{0x03, "Resources not available"},
|
|
{0x04, "A21 context for this MS/AT may be released"},
|
|
{0x05, "Airlink lost"},
|
|
{0x06, "Abort Handoff from HRPD to 1x"},
|
|
{0x07, "Unspecified"},
|
|
{0x08, "Rejection"},
|
|
{0x09, "Already Paging"},
|
|
{0x0A, "Abort handoff from LTE to 1x"},
|
|
{0x0B, "Version not supported"},
|
|
/* All other values are reserved */
|
|
{0, NULL}
|
|
};
|
|
|
|
|
|
static void
|
|
dissect_a21_cause(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
|
|
{
|
|
int offset = 0;
|
|
|
|
proto_tree_add_item(tree, hf_a21_cause_value, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/* offset++; */
|
|
}
|
|
|
|
static const value_string a21_event_vals[] = {
|
|
{0x00, "MS/AT present in 1x"},
|
|
{0x01, "MS/AT present in HRPD/Cancel Handoff"},
|
|
{0x02, "1x Power Down"},
|
|
{0x03, "HRPD Power Down/Connection Closed"},
|
|
{0x04, "Handoff Rejected"},
|
|
{0x05, "1x Registration"},
|
|
{0x06, "Transmission of All 1x LAC Encapsulated PDUs Disabled"},
|
|
{0x07, "Transmission of 1x LAC Encapsulated PDU(s) Enabled"},
|
|
{0x08, "MS/AT no longer present in this AN/PCF"},
|
|
{0x09, "MS/AT no longer present in this 1x BS"},
|
|
{0x0A, "MS/AT Not Acquired"},
|
|
{0x0B, "Redirection"},
|
|
/* All other values are reserved */
|
|
{0, NULL}
|
|
};
|
|
|
|
static const value_string a21_additional_event_info_vals[] = {
|
|
{0x00, "This field shall not be included"},
|
|
{0x01, "This field shall not be included"},
|
|
{0x02, "This field shall not be included"},
|
|
{0x03, "This field shall not be included"},
|
|
{0x04, "This field shall not be included"},
|
|
{0x05, "This field shall not be included"},
|
|
{0x06, "This field shall not be included"},
|
|
{0x07, "This field shall contain the variable length AllowedForwardLinkMessages negotiated by the HRPD AN and the AT"},
|
|
/* All other values, This field shall not be included */
|
|
{0, NULL}
|
|
};
|
|
|
|
|
|
static void
|
|
dissect_a21_event(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item, guint16 length, guint8 message_type _U_)
|
|
{
|
|
int offset = 0;
|
|
guint8 event_id;
|
|
|
|
if (tree == NULL)
|
|
return;
|
|
event_id = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_a21_event, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(item, "%s", val_to_str_const(event_id, a21_event_vals, "Unknown"));
|
|
offset++;
|
|
if (length>1) {
|
|
if (event_id == 7) {
|
|
proto_tree_add_item(tree, hf_a21_allowed_forward_link_message, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
/*offset += 2;*/
|
|
}
|
|
else {
|
|
proto_tree_add_item(tree, hf_a21_additional_event_info, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
/*offset += 2;*/
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
static const value_string a21_service_option_vals[] = {
|
|
{0x003B, "HRPD Packet Data"},
|
|
/*{0x59xx, "HRPD Packet Data with ReservationLabel where xx = [00-FFH] and contains the ReservationLabel"},*/
|
|
{0, NULL}
|
|
};
|
|
|
|
|
|
/* 5.2.4.13 Service Option */
|
|
static void
|
|
dissect_a21_service_option(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, proto_item *item _U_, guint16 length _U_, guint8 message_type _U_)
|
|
{
|
|
int offset = 0;
|
|
|
|
proto_tree_add_item(tree, hf_a21_service_option, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
/* offset += 2; */
|
|
|
|
}
|
|
|
|
static void
|
|
dissect_a21_unknown(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *item _U_, guint16 length, guint8 message_type _U_)
|
|
{
|
|
proto_tree_add_expert(tree, pinfo, &ei_a21_ie_data_not_dissected_yet, tvb, 0, length);
|
|
}
|
|
|
|
static const value_string a21_element_type_vals[] = {
|
|
{0x01, "1x LAC Encapsulated PDU"},
|
|
{0x02, "A21 1x Parameters"},
|
|
{0x03, "Pilot List"},
|
|
{0x04, "Correlation ID"},
|
|
{0x05, "Mobile Identity (MN ID)"},
|
|
{0x06, "Authentication Challenge Parameter (RAND)"},
|
|
{0x07, "A21 1x Message Transmission Control"},
|
|
{0x08, "A21 Cause"},
|
|
{0x09, "A21 Event"},
|
|
{0x0A, "Service Option"},
|
|
{0x0B, "A21 Mobile Subscription Information"},
|
|
{0x0C, "GCSNA Status"},
|
|
{0x0D, "Reference Cell ID"},
|
|
{0xC0, "GCSNA PDU"},
|
|
{0, NULL}
|
|
};
|
|
|
|
|
|
void
|
|
dissect_a21_ie_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *top_tree, proto_tree *tree, gint offset, guint8 message_type)
|
|
{
|
|
guint8 ie_type, length_len;
|
|
guint16 length = 0;
|
|
tvbuff_t *ie_tvb;
|
|
proto_tree *ie_tree;
|
|
proto_item *ti;
|
|
|
|
while (offset < (gint)tvb_reported_length(tvb)) {
|
|
ie_type = tvb_get_guint8(tvb, offset);
|
|
if (ie_type == A21_IEI_GCSNA_PDU) {
|
|
/* length of GCSNA PDU is 2 octets long */
|
|
length_len = 2;
|
|
length = tvb_get_ntohs(tvb, offset+1);
|
|
} else {
|
|
/* Octet 2-length */
|
|
length_len = 1;
|
|
length = tvb_get_guint8(tvb, offset+1);
|
|
}
|
|
|
|
ie_tree = proto_tree_add_subtree_format(tree, tvb, offset, 1 + length_len + length, ett_a21_ie, &ti,
|
|
"%s : ", val_to_str_const(ie_type, a21_element_type_vals, "Unknown"));
|
|
|
|
/* Octet 1-element identifier */
|
|
proto_tree_add_item(ie_tree, hf_a21_element_identifier, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
proto_tree_add_item(ie_tree, hf_a21_gcsna_pdu_length, tvb, offset, length_len, ENC_BIG_ENDIAN);
|
|
offset = offset+length_len;
|
|
|
|
ie_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
switch (ie_type) {
|
|
case A21_IEI_1X_LAC_ENCAPSULATED_PDU:
|
|
/* 5.2.4.4 1x LAC Encapsulated PDU */
|
|
dissect_a21_1x_lac_encapsulated_pdu(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_A21_1X_PARAMETERS:
|
|
/* 5.2.4.5 A21 1x Parameters */
|
|
dissect_a21_1x_parameters(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_PILOT_LIST:
|
|
/* 5.2.4.6 Pilot List */
|
|
dissect_a21_pilot_list(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_CORRELATION_ID:
|
|
/* 5.2.4.7 Correlation ID */
|
|
dissect_a21_correlation_id(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_MOBILE_IDENTITY:
|
|
/* 5.2.4.8 Mobile Identity (MN ID) */
|
|
dissect_a21_mobile_identity(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_AUTHENTICATION_CHALLENGE_PARAMETER:
|
|
/* 5.2.4.9 Authentication Challenge Parameter (RAND) */
|
|
dissect_a21_authentication_challenge_parameter(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_A21_1X_MESSAGE_TRANSMISSION_CONTROL:
|
|
/* 5.2.4.10 A21 1x Message Transmission Control */
|
|
dissect_a21_1x_message_transmission_control(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_A21_CAUSE:
|
|
/* 5.2.4.11 A21 Cause */
|
|
dissect_a21_cause(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_A21_EVENT:
|
|
/* 5.2.4.12 A21 Event */
|
|
dissect_a21_event(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_SERVICE_OPTION:
|
|
/* 5.2.4.13 Service Option */
|
|
dissect_a21_service_option(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_A21_MOBILE_SUBSCRIPTION_INFORMATION:
|
|
/* 5.2.4.14 A21 Mobile Subscription Information */
|
|
dissect_a21_mobile_subscription_information(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_GCSNA_STATUS:
|
|
/* 5.2.4.15 GCSNA Status */
|
|
dissect_a21_gcsna_status(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_GCSNA_PDU:
|
|
/* 5.2.4.16 GCSNA PDU */
|
|
dissect_a21_gcsna_pdu(ie_tvb,pinfo, top_tree, ie_tree, ti, length, message_type);
|
|
break;
|
|
case A21_IEI_REFERENCE_CELL_ID:
|
|
/* 5.2.4.17 Reference Cell ID */
|
|
dissect_a21_reference_cell_id(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
default:
|
|
dissect_a21_unknown(ie_tvb,pinfo, ie_tree, ti, length, message_type);
|
|
break;
|
|
}
|
|
offset = offset + length;
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_a21(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint8 message_type;
|
|
int offset = 0;
|
|
proto_item *ti, *tc;
|
|
proto_tree *a21_tree, *corr_tree;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "A21");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
/* Message header is 7 octet long
|
|
* Octet 1 consists of message type
|
|
* Octets 2-7 contain the Correlation Identifier.
|
|
*/
|
|
|
|
message_type = tvb_get_guint8(tvb, offset);
|
|
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(message_type, a21_message_type_vals, "Unknown"));
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_a21, tvb, 0, -1,
|
|
"A21 Protocol: %s",
|
|
val_to_str_const(message_type, a21_message_type_vals, "Unknown"));
|
|
a21_tree = proto_item_add_subtree(ti, ett_a21);
|
|
|
|
/* message type in Octet 1 */
|
|
proto_tree_add_item(a21_tree, hf_a21_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
/* Correlation Identifier in Octets 2-7 */
|
|
tc = proto_tree_add_item(a21_tree, hf_a21_corr_id, tvb, offset, 6, ENC_BIG_ENDIAN);
|
|
corr_tree = proto_item_add_subtree(tc,ett_a21_corr_id);
|
|
|
|
proto_tree_add_item(corr_tree, hf_a21_element_identifier, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
proto_tree_add_item(corr_tree, hf_a21_element_length, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
proto_tree_add_item(corr_tree, hf_a21_corr_id_corr_value, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
dissect_a21_ie_common(tvb, pinfo, tree, a21_tree, offset, message_type);
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void proto_register_a21(void)
|
|
{
|
|
static hf_register_info hf_a21[] = {
|
|
{ &hf_a21_message_type,
|
|
{"Message Type", "a21.message_type",
|
|
FT_UINT8, BASE_DEC, VALS(a21_message_type_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_corr_id,
|
|
{"A21 Correlation ID", "a21.correlation_id",
|
|
FT_UINT64, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_element_identifier,
|
|
{"A21 Element Identifier", "a21.element_identifier",
|
|
FT_UINT8, BASE_DEC, VALS(a21_element_type_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_element_length,
|
|
{"Length", "a21.length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_corr_id_corr_value,
|
|
{"Correlation Value", "a21.corr_id_corr_value",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mn_id_msid_value,
|
|
{"MSID Value", "a21.mn_id_msid_value",
|
|
FT_UINT8, BASE_DEC, NULL, 0xf8,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mn_id_identity_digit_1,
|
|
{"Identity Digit 1", "a21.mn_id_identity_digit_1",
|
|
FT_UINT8, BASE_DEC, NULL, 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mn_id_odd_even_indicator,
|
|
{"Odd/Even Indicator", "a21.mn_id_odd_even_indicator",
|
|
FT_UINT8, BASE_DEC, NULL, 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mn_id_type_of_identity,
|
|
{"Type of Identity", "a21.mn_id_type_of_identity",
|
|
FT_UINT8, BASE_DEC, VALS(a21_mn_id_type_of_identity_vals), 0x07,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mn_id_esn,
|
|
{"ESN", "a21.mn_id_esn",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_reserved,
|
|
{"Reserved", "a21.reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0xf0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_msg_tran_ctrl_paging_msg,
|
|
{"Paging Message", "a21.msg_tran_ctrl_paging_msg",
|
|
FT_UINT8, BASE_DEC, NULL, 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_msg_tran_ctrl_simul_xmit_with_next,
|
|
{"Simul Xmit with Next", "a21.msg_tran_ctrl_simul_xmit_with_next",
|
|
FT_UINT8, BASE_DEC, NULL, 0x04,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_msg_tran_ctrl_ackrequired,
|
|
{"AckRequired", "a21.msg_tran_ctrl_ackrequired",
|
|
FT_UINT8, BASE_DEC, NULL, 0x02,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_msg_tran_ctrl_3GXLogicalChannel,
|
|
{"3GXLogicalChannel", "a21.msg_tran_ctrl_3GXLogicalChannel",
|
|
FT_UINT8, BASE_DEC, NULL, 0x01,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_msg_tran_ctrl_protocol_revision,
|
|
{"ProtocolRevision", "a21.msg_tran_ctrl_protocol_revision",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_1x_lac_en_pdu,
|
|
{"1x LAC Encapsulated PDU", "a21.1x_lac_en_pdu",
|
|
FT_UINT24, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_pilot_list_num_of_pilots,
|
|
{"Number of Pilots", "a21.pilot_list_num_of_pilots",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_pilot_list_value,
|
|
{"Pilot List Value", "a21.pilot_list_value",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_cause_value,
|
|
{"A21 Cause Value", "a21.cause_value",
|
|
FT_UINT8, BASE_DEC, VALS(a21_cause_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mscid_market_id,
|
|
{"Market ID", "a21.mscid_market_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mscid_switch_number,
|
|
{"Switch Number", "a21.mscid_switch_number",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_event,
|
|
{"Event", "a21.event",
|
|
FT_UINT8, BASE_DEC, VALS(a21_event_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_additional_event_info,
|
|
{"Additional Event Info", "a21.additional_event_info",
|
|
FT_UINT16, BASE_DEC, VALS(a21_additional_event_info_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_allowed_forward_link_message,
|
|
{"Allowed Forward Link Messages", "a21.allowed_forward_link_message",
|
|
FT_UINT16, BASE_DEC, VALS(a21_additional_event_info_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_pdu_length,
|
|
{"Length", "a21.gcsna_pdu_length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_content,
|
|
{"GCSNA Content", "a21.gcsna_content",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_reference_cell_id_cell,
|
|
{"Cell", "a21.reference_cell_id_cell",
|
|
FT_UINT16, BASE_DEC, NULL, 0xfff0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_reference_cell_id_sector,
|
|
{"Sector", "a21.reference_cell_id_sector",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_record_id,
|
|
{"Record Identifier", "a21.mob_sub_info_record_id",
|
|
FT_UINT8, BASE_DEC, VALS(a21_record_identifier_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_record_length,
|
|
{"Record Length", "a21.mob_sub_info_record_length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_record_content,
|
|
{"Record Content", "a21.mob_sub_info_record_content",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_re_con_all_band_inc,
|
|
{"All Band Classes Included", "a21.mob_sub_info_re_con_all_band_inc",
|
|
FT_UINT8, BASE_DEC, NULL, 0x80,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_re_con_curr_band_sub,
|
|
{"Current Band Subclass", "a21.mob_sub_info_re_con_curr_band_sub",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_re_band_class,
|
|
{"Band Class", "a21.mob_sub_info_re_band_class",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_re_con_all_sub_band_inc,
|
|
{"All Band Subclasses Included", "a21.mob_sub_info_re_con_all_sub_band_inc",
|
|
FT_UINT8, BASE_DEC, NULL, 0x80,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_mob_sub_info_re_sub_cls_len,
|
|
{"Subclass Length", "a21.mob_sub_info_re_sub_cls_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
#if 0
|
|
{ &hf_a21_mob_sub_info_re_con_band_class,
|
|
{"Band Class", "a21.mob_sub_info_re_con_band_class",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
#endif
|
|
{ &hf_a21_auth_chall_para_rand_num_type,
|
|
{"Random Number Type", "a21.auth_chall_para_rand_num_type",
|
|
FT_UINT8, BASE_DEC|BASE_RANGE_STRING, RVALS(a21_random_number_type_rvals), 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_auth_chall_para_rand_value,
|
|
{"RAND Value", "a21.auth_chall_para_rand_value",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_service_option,
|
|
{"Service Option", "a21.service_option",
|
|
FT_UINT8, BASE_DEC, VALS(a21_service_option_vals), 0x7f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_status_reserved,
|
|
{"Reserved", "a21.gcsna_status_reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0xf8,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_status_priority_incl,
|
|
{"Priority Incl", "a21.gcsna_status_priority_incl",
|
|
FT_UINT8, BASE_DEC, NULL, 0x04,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_status_gec,
|
|
{"GEC", "a21.gcsna_status_gec",
|
|
FT_UINT8, BASE_DEC, NULL, 0x02,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_status_status_incl,
|
|
{"Status Incl", "a21.gcsna_status_status_incl",
|
|
FT_UINT8, BASE_DEC, NULL, 0x01,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_status,
|
|
{"Status", "a21.gcsna_status",
|
|
FT_UINT8, BASE_DEC, VALS(a21_gcsna_status_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_gcsna_status_call_priority,
|
|
{"Call Priority", "a21.gcsna_status_call_priority",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_a21_3G1X_parameters,
|
|
{"3G1X Parameters", "a21.3G1X_parameters",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
};
|
|
/* Setup protocol subtree array */
|
|
static gint *ett_a21_array[] = {
|
|
&ett_a21,
|
|
&ett_a21_corr_id,
|
|
&ett_a21_ie,
|
|
&ett_a21_record_content
|
|
};
|
|
|
|
expert_module_t *expert_a21;
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_a21_ie_data_not_dissected_yet,
|
|
{ "a21.ie_data_not_dissected_yet",
|
|
PI_PROTOCOL, PI_NOTE, "IE data not dissected yet", EXPFILL }},
|
|
};
|
|
|
|
proto_a21 = proto_register_protocol("A21 Protocol", "A21", "a21");
|
|
proto_register_field_array(proto_a21, hf_a21, array_length(hf_a21));
|
|
proto_register_subtree_array(ett_a21_array, array_length(ett_a21_array));
|
|
expert_a21 = expert_register_protocol(proto_a21);
|
|
expert_register_field_array(expert_a21, ei, array_length(ei));
|
|
}
|
|
|
|
void proto_reg_handoff_a21(void)
|
|
{
|
|
dissector_handle_t a21_handle;
|
|
|
|
a21_handle = create_dissector_handle(dissect_a21, proto_a21);
|
|
gcsna_handle = find_dissector_add_dependency("gcsna", proto_a21);
|
|
dissector_add_uint_with_preference("udp.port", A21_PORT, a21_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|