![Bill Meier](/assets/img/avatar_default.png)
- when the text parameter is constant col_add_str() and col_set_str() are equivalent but col_set_str() is faster. - same for replace col_append_fstr and col_append_str - remove col_clear() when it's redundant: + before a col_set/col_add if the dissector can't throw an exception. - replace col_append() after a col_clear() with faster col_add... or col_set https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9344 svn path=/trunk/; revision=52948
1210 lines
39 KiB
C
1210 lines
39 KiB
C
/* packet-nsip.c
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* Routines for Network Service Over IP dissection
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* Copyright 2000, Susanne Edlund <susanne.edlund@ericsson.com>
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*
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* $Id$
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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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/* 3GPP TS 48.016 V 5.3.0 (2004-07) Release 6 + CR013 */
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#include "config.h"
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#include <epan/packet.h>
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#include <prefs.h>
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#define NSIP_DEBUG 0
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#define NSIP_SEP ", " /* Separator string */
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static range_t *global_nsip_udp_port_range;
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#define DEFAULT_NSIP_PORT_RANGE "2157,19999"
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void proto_reg_handoff_nsip(void);
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/* Initialize the protocol and registered fields */
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static int proto_nsip = -1;
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static int hf_nsip_cause = -1;
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static int hf_nsip_ns_vci = -1;
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static int hf_nsip_pdu_type = -1;
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static int hf_nsip_bvci = -1;
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static int hf_nsip_nsei = -1;
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/* static int hf_nsip_ip4_elements = -1; */
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/* static int hf_nsip_ip6_elements = -1; */
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static int hf_nsip_max_num_ns_vc = -1;
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static int hf_nsip_num_ip4_endpoints = -1;
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static int hf_nsip_num_ip6_endpoints = -1;
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static int hf_nsip_reset_flag = -1;
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static int hf_nsip_reset_flag_spare = -1;
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static int hf_nsip_ip_address_type = -1;
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static int hf_nsip_ip_address_ipv4 = -1;
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static int hf_nsip_ip_address_ipv6 = -1;
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static int hf_nsip_end_flag = -1;
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static int hf_nsip_end_flag_spare = -1;
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static int hf_nsip_control_bits_r = -1;
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static int hf_nsip_control_bits_c = -1;
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static int hf_nsip_control_bits_spare = -1;
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static int hf_nsip_transaction_id = -1;
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/* static int hf_nsip_ip_element_ip_address_ipv4 = -1; */
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/* static int hf_nsip_ip_element_ip_address_ipv6 = -1; */
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static int hf_nsip_ip_element_udp_port = -1;
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static int hf_nsip_ip_element_signalling_weight = -1;
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static int hf_nsip_ip_element_data_weight = -1;
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/* Initialize the subtree pointers */
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static gint ett_nsip = -1;
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static gint ett_nsip_control_bits = -1;
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static gint ett_nsip_reset_flag = -1;
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static gint ett_nsip_end_flag = -1;
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static gint ett_nsip_ip_element = -1;
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static gint ett_nsip_ip_element_list = -1;
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/* PDU type coding, v5.3.0, table 10.3.7.1, p 51 */
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#define NSIP_PDU_NS_UNITDATA 0x00
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#define NSIP_PDU_NS_RESET 0x02
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#define NSIP_PDU_NS_RESET_ACK 0x03
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#define NSIP_PDU_NS_BLOCK 0x04
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#define NSIP_PDU_NS_BLOCK_ACK 0x05
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#define NSIP_PDU_NS_UNBLOCK 0x06
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#define NSIP_PDU_NS_UNBLOCK_ACK 0x07
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#define NSIP_PDU_NS_STATUS 0x08
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#define NSIP_PDU_NS_ALIVE 0x0a
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#define NSIP_PDU_NS_ALIVE_ACK 0x0b
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#define NSIP_PDU_SNS_ACK 0x0c
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#define NSIP_PDU_SNS_ADD 0x0d
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#define NSIP_PDU_SNS_CHANGEWEIGHT 0x0e
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#define NSIP_PDU_SNS_CONFIG 0x0f
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#define NSIP_PDU_SNS_CONFIG_ACK 0x10
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#define NSIP_PDU_SNS_DELETE 0x11
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#define NSIP_PDU_SNS_SIZE 0x12
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#define NSIP_PDU_SNS_SIZE_ACK 0x13
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static const value_string tab_nsip_pdu_types[] = {
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{ NSIP_PDU_NS_UNITDATA, "NS_UNITDATA" },
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{ NSIP_PDU_NS_RESET, "NS_RESET" },
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{ NSIP_PDU_NS_RESET_ACK, "NS_RESET_ACK" },
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{ NSIP_PDU_NS_BLOCK, "NS_BLOCK" },
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{ NSIP_PDU_NS_BLOCK_ACK, "NS_BLOCK_ACK" },
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{ NSIP_PDU_NS_UNBLOCK, "NS_UNBLOCK" },
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{ NSIP_PDU_NS_UNBLOCK_ACK, "NS_UNBLOCK_ACK" },
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{ NSIP_PDU_NS_STATUS, "NS_STATUS" },
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{ NSIP_PDU_NS_ALIVE, "NS_ALIVE" },
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{ NSIP_PDU_NS_ALIVE_ACK, "NS_ALIVE_ACK" },
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{ NSIP_PDU_SNS_ACK, "SNS_ACK" },
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{ NSIP_PDU_SNS_ADD, "SNS_ADD" },
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{ NSIP_PDU_SNS_CHANGEWEIGHT, "SNS_CHANGEWEIGHT" },
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{ NSIP_PDU_SNS_CONFIG, "SNS_CONFIG" },
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{ NSIP_PDU_SNS_CONFIG_ACK, "SNS_CONFIG_ACK" },
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{ NSIP_PDU_SNS_DELETE, "SNS_DELETE" },
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{ NSIP_PDU_SNS_SIZE, "SNS_SIZE" },
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{ NSIP_PDU_SNS_SIZE_ACK, "SNS_SIZE_ACK" },
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{ 0, NULL },
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};
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/* Information element coding, v 5.3.0, table 10.3.1, p 46 */
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#define NSIP_IE_CAUSE 0x00
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#define NSIP_IE_NS_VCI 0x01
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#define NSIP_IE_NS_PDU 0x02
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#define NSIP_IE_BVCI 0x03
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#define NSIP_IE_NSEI 0x04
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#define NSIP_IE_IP4_ELEMENTS 0x05
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#define NSIP_IE_IP6_ELEMENTS 0x06
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#define NSIP_IE_MAX_NUM_NS_VC 0x07
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#define NSIP_IE_NUM_IP4_ENDPOINTS 0x08
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#define NSIP_IE_NUM_IP6_ENDPOINTS 0x09
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#define NSIP_IE_RESET_FLAG 0x0a
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#define NSIP_IE_IP_ADDRESS 0x0b
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#if NSIP_DEBUG
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static const value_string tab_nsip_ieis[] = {
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{ NSIP_IE_CAUSE, "Cause" },
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{ NSIP_IE_NS_VCI, "NS-VCI" },
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{ NSIP_IE_NS_PDU, "NS PDU" },
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{ NSIP_IE_BVCI, "BVCI" },
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{ NSIP_IE_NSEI, "NSEI" },
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{ NSIP_IE_IP4_ELEMENTS, "List of IP4 Elements" },
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{ NSIP_IE_IP6_ELEMENTS, "List of IP6 Elements" },
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{ NSIP_IE_MAX_NUM_NS_VC, "Maximum Number of NC-VCs" },
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{ NSIP_IE_NUM_IP4_ENDPOINTS, "Number of IP4 Endpoints" },
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{ NSIP_IE_NUM_IP6_ENDPOINTS, "Number of IP6 Endpoints"},
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{ NSIP_IE_RESET_FLAG, "Reset Flag" },
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{ NSIP_IE_IP_ADDRESS, "IP Address" },
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{ 0, NULL },
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};
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#endif
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/* Cause values, v 5.3.0, table 10.3.2.1, p 47 */
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#define NSIP_CAUSE_TRANSIT_NETWORK_FAILURE 0x00
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#define NSIP_CAUSE_OM_INTERVENTION 0x01
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#define NSIP_CAUSE_EQUIPMENT_FAILURE 0x02
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#define NSIP_CAUSE_NS_VC_BLOCKED 0x03
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#define NSIP_CAUSE_NS_VC_UNKNOWN 0x04
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#define NSIP_CAUSE_BVCI_UNKNOWN 0x05
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#define NSIP_CAUSE_SEMANTICALLY_INCORRECT_PDU 0x08
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#define NSIP_CAUSE_NSIP_PDU_NOT_COMPATIBLE 0x0a
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#define NSIP_CAUSE_PROTOCOL_ERROR 0x0b
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#define NSIP_CAUSE_INVALID_ESSENTIAL_IE 0x0c
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#define NSIP_CAUSE_MISSING_ESSENTIAL_IE 0x0d
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#define NSIP_CAUSE_INVALID_NUM_IP4_ENDPOINTS 0x0e
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#define NSIP_CAUSE_INVALID_NUM_IP6_ENDPOINTS 0x0f
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#define NSIP_CAUSE_INVALID_NUM_NS_VC 0x10
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#define NSIP_CAUSE_INVALID_WEIGHTS 0x11
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#define NSIP_CAUSE_UNKNOWN_IP_ENDPOINT 0x12
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#define NSIP_CAUSE_UNKNOWN_IP_ADDRESS 0x13
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#define NSIP_CAUSE_IP_TEST_FAILED 0x14
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static const value_string tab_nsip_cause_values[] = {
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{ NSIP_CAUSE_TRANSIT_NETWORK_FAILURE, "Transit network failure" },
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{ NSIP_CAUSE_OM_INTERVENTION, "O&M intervention" },
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{ NSIP_CAUSE_EQUIPMENT_FAILURE, "Equipment failure" },
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{ NSIP_CAUSE_NS_VC_BLOCKED, "NS-VC blocked" },
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{ NSIP_CAUSE_NS_VC_UNKNOWN, "NS-VC unknown" },
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{ NSIP_CAUSE_BVCI_UNKNOWN, "BVCI unknown on that NSE" },
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{ NSIP_CAUSE_SEMANTICALLY_INCORRECT_PDU, "Semantically incorrect PDU" },
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{ NSIP_CAUSE_NSIP_PDU_NOT_COMPATIBLE, "PDU not compatible with the protocol state" },
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{ NSIP_CAUSE_PROTOCOL_ERROR, "Protocol error - unspecified" },
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{ NSIP_CAUSE_INVALID_ESSENTIAL_IE, "Invalid essential IE" },
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{ NSIP_CAUSE_MISSING_ESSENTIAL_IE, "Missing essential IE" },
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{ NSIP_CAUSE_INVALID_NUM_IP4_ENDPOINTS, "Invalid number of IP4 endpoints" },
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{ NSIP_CAUSE_INVALID_NUM_IP6_ENDPOINTS, "Invalid number of IP6 endpoints" },
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{ NSIP_CAUSE_INVALID_NUM_NS_VC, "Invalid number of NS-VCs" },
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{ NSIP_CAUSE_INVALID_WEIGHTS, "Invalid weights" },
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{ NSIP_CAUSE_UNKNOWN_IP_ENDPOINT, "Unknown IP endpoint" },
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{ NSIP_CAUSE_UNKNOWN_IP_ADDRESS, "Unknown IP address" },
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{ NSIP_CAUSE_IP_TEST_FAILED, "IP test failed" },
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{ 0, NULL },
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};
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/* Presence requirements of Information Elements
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v 5.3.0, chapter 8.1.1, p. 35 */
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#define NSIP_IE_PRESENCE_M 1 /* Mandatory */
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#define NSIP_IE_PRESENCE_O 2 /* Conditional */
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#define NSIP_IE_PRESENCE_C 3 /* Optional */
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/* Format options */
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#define NSIP_IE_FORMAT_V 1
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#define NSIP_IE_FORMAT_TV 2
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#define NSIP_IE_FORMAT_TLV 3
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/* IP address types, v 5.3.0, chapter 10.3.2b, p. 48 */
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#define NSIP_IP_ADDRESS_TYPE_IPV4 1
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#define NSIP_IP_ADDRESS_TYPE_IPV6 2
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#define NSIP_IP_VERSION_4 4
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#define NSIP_IP_VERSION_6 6
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static const value_string ip_address_type_vals[] = {
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{ 0, "Reserved" },
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{ NSIP_IP_ADDRESS_TYPE_IPV4, "IPv4 Address" },
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{ NSIP_IP_ADDRESS_TYPE_IPV6, "IPv6 Address" },
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{ 0, NULL },
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};
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#define NSIP_MASK_CONTROL_BITS_R 0x01
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#define NSIP_MASK_CONTROL_BITS_C 0x02
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#define NSIP_MASK_CONTROL_BITS_SPARE 0xFC
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#define NSIP_MASK_END_FLAG 0x01
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#define NSIP_MASK_END_FLAG_SPARE 0xFE
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#define NSIP_MASK_RESET_FLAG 0x01
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#define NSIP_MASK_RESET_FLAG_SPARE 0xFE
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static dissector_handle_t bssgp_handle;
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static dissector_handle_t nsip_handle;
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static gboolean nsip_is_recursive = FALSE;
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typedef struct {
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guint8 iei;
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guint8 presence_req;
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int format;
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guint16 value_length; /* in bytes */
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guint16 total_length; /* as specified, or 0 if unspecified */
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} nsip_ie_t;
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typedef struct {
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tvbuff_t *tvb;
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int offset;
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packet_info *pinfo;
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proto_tree *nsip_tree;
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proto_tree *parent_tree;
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proto_item *ti;
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} build_info_t;
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typedef struct {
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int version;
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int address_length;
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int total_length;
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} nsip_ip_element_info_t;
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static nsip_ip_element_info_t ipv4_element = { NSIP_IP_VERSION_4, 4, 8 };
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static nsip_ip_element_info_t ipv6_element = { NSIP_IP_VERSION_6, 16, 20 };
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static void
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get_value_length(nsip_ie_t *ie, build_info_t *bi) {
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/* length indicator in bit 8, 0 => two bytes, 1 => one byte */
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const guint8 MASK_LENGTH_INDICATOR = 0x80;
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const guint8 MASK_ONE_BYTE_LENGTH = 0x7f;
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guint8 length_len;
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guint16 length;
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length = tvb_get_guint8(bi->tvb, bi->offset);
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length_len = 1;
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if (length & MASK_LENGTH_INDICATOR) {
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length &= MASK_ONE_BYTE_LENGTH;
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}
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else {
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length_len++;
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length <<= 8;
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length |= tvb_get_guint8(bi->tvb, bi->offset+1);
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}
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ie->value_length = length;
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ie->total_length += length_len + length;
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bi->offset += length_len;
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}
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static int
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check_correct_iei(nsip_ie_t *ie, build_info_t *bi) {
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guint8 fetched_iei = tvb_get_guint8(bi->tvb, bi->offset);
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#if NSIP_DEBUG
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if (fetched_iei != ie->iei) {
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proto_tree_add_text(bi->nsip_tree, bi->tvb, bi->offset, 1,
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"Tried IEI %s (%#02x), found IEI %s (%#02x)",
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val_to_str_const(ie->iei, tab_nsip_ieis, "Unknown"),
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ie->iei,
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val_to_str_const(fetched_iei, tab_nsip_ieis, "Unknown"),
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fetched_iei);
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}
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#endif
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return (fetched_iei == ie->iei);
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}
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static void
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decode_iei_cause(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
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guint8 cause;
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cause = tvb_get_guint8(bi->tvb, bi->offset);
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proto_tree_add_uint(bi->nsip_tree, hf_nsip_cause,
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bi->tvb, ie_start_offset, ie->total_length,
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cause);
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col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
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"Cause: %s",
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val_to_str(cause, tab_nsip_cause_values, "Unknown (0x%02x)"));
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proto_item_append_text(bi->ti, ", Cause: %s",
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val_to_str(cause, tab_nsip_cause_values, "Unknown (0x%02x)"));
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bi->offset += ie->value_length;
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}
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static void
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decode_iei_ns_vci(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
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guint16 ns_vci;
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ns_vci = tvb_get_ntohs(bi->tvb, bi->offset);
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proto_tree_add_uint(bi->nsip_tree, hf_nsip_ns_vci,
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bi->tvb, ie_start_offset, ie->total_length,
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ns_vci);
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col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
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"NS VCI: %#04x", ns_vci);
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proto_item_append_text(bi->ti, ", NS VCI: %#04x", ns_vci);
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bi->offset += ie->value_length;
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}
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static void
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decode_iei_ns_pdu(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
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tvbuff_t * next_tvb;
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proto_tree_add_text(bi->nsip_tree, bi->tvb, ie_start_offset,
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ie->total_length,
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"NS PDU (%u bytes)", ie->value_length);
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next_tvb = tvb_new_subset(bi->tvb, bi->offset, ie->value_length, -1);
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if (nsip_handle) {
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gboolean was_recursive;
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was_recursive = nsip_is_recursive;
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nsip_is_recursive = TRUE;
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call_dissector(nsip_handle, next_tvb, bi->pinfo, bi->nsip_tree);
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nsip_is_recursive = was_recursive;
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}
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bi->offset += ie->value_length;
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}
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static void
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decode_iei_nsei(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
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guint16 nsei = tvb_get_ntohs(bi->tvb, bi->offset);
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proto_tree_add_uint(bi->nsip_tree, hf_nsip_nsei, bi->tvb,
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ie_start_offset, ie->total_length, nsei);
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bi->offset += ie->value_length;
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col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
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"NSEI %u", nsei);
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proto_item_append_text(bi->ti, ", NSEI %u", nsei);
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}
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static void
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decode_iei_bvci(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
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guint16 bvci = tvb_get_ntohs(bi->tvb, bi->offset);
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proto_tree_add_uint(bi->nsip_tree, hf_nsip_bvci, bi->tvb,
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ie_start_offset, ie->total_length, bvci);
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bi->offset += ie->value_length;
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col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
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"BVCI %u", bvci);
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proto_item_append_text(bi->ti, ", BVCI %u", bvci);
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}
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static proto_item *
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decode_ip_element(nsip_ip_element_info_t *element, build_info_t *bi, proto_tree * element_tree) {
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guint16 udp_port;
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guint32 ip4_addr;
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struct e_in6_addr ip6_addr;
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proto_item *tf = NULL;
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proto_tree *field_tree = NULL;
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if (bi->nsip_tree) {
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tf = proto_tree_add_text(element_tree, bi->tvb, bi->offset,
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element->total_length, "IP Element");
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field_tree = proto_item_add_subtree(tf, ett_nsip_ip_element);
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|
|
/* IP address */
|
|
switch (element->version) {
|
|
case NSIP_IP_VERSION_4:
|
|
ip4_addr = tvb_get_ipv4(bi->tvb, bi->offset);
|
|
proto_tree_add_item(field_tree, hf_nsip_ip_address_ipv4,
|
|
bi->tvb, bi->offset, element->address_length,
|
|
ENC_BIG_ENDIAN);
|
|
proto_item_append_text(tf, ": IP address: %s",
|
|
ip_to_str((guint8 *)&ip4_addr));
|
|
|
|
break;
|
|
case NSIP_IP_VERSION_6:
|
|
tvb_get_ipv6(bi->tvb, bi->offset, &ip6_addr);
|
|
proto_tree_add_item(field_tree, hf_nsip_ip_address_ipv6, bi->tvb,
|
|
bi->offset, element->address_length,
|
|
ENC_NA);
|
|
proto_item_append_text(tf, ": IP address: %s",
|
|
ip6_to_str((struct e_in6_addr *)&ip6_addr));
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
}
|
|
bi->offset += element->address_length;
|
|
|
|
if (bi->nsip_tree) {
|
|
/* UDP port value */
|
|
udp_port = tvb_get_ntohs(bi->tvb, bi->offset);
|
|
proto_tree_add_item(field_tree, hf_nsip_ip_element_udp_port,
|
|
bi->tvb, bi->offset, 2, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(tf, ", UDP Port: %u", udp_port);
|
|
}
|
|
bi->offset += 2;
|
|
|
|
if (bi->nsip_tree) {
|
|
/* Signalling weight */
|
|
proto_tree_add_item(field_tree, hf_nsip_ip_element_signalling_weight,
|
|
bi->tvb, bi->offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
bi->offset++;
|
|
|
|
if (bi->nsip_tree) {
|
|
/* Data weight */
|
|
proto_tree_add_item(field_tree, hf_nsip_ip_element_data_weight,
|
|
bi->tvb, bi->offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
bi->offset++;
|
|
return tf;
|
|
}
|
|
|
|
static proto_item *
|
|
decode_ip_elements(nsip_ip_element_info_t *element, nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
int i;
|
|
int num_elements = ie->value_length / element->total_length;
|
|
proto_item *tf;
|
|
proto_tree *field_tree;
|
|
|
|
tf = proto_tree_add_text(bi->nsip_tree, bi->tvb, ie_start_offset,
|
|
ie->total_length,
|
|
"List of IP%u Elements (%u Elements)",
|
|
element->version, num_elements);
|
|
field_tree = proto_item_add_subtree(tf, ett_nsip_ip_element_list);
|
|
|
|
for (i = 0; i < num_elements; i++) {
|
|
decode_ip_element(element, bi, field_tree);
|
|
}
|
|
return tf;
|
|
}
|
|
|
|
static void
|
|
decode_iei_max_num_ns_vc(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint16 num_ns_vc;
|
|
|
|
if (bi->nsip_tree) {
|
|
num_ns_vc = tvb_get_ntohs(bi->tvb, bi->offset);
|
|
|
|
proto_tree_add_uint(bi->nsip_tree, hf_nsip_max_num_ns_vc,
|
|
bi->tvb, ie_start_offset, ie->total_length,
|
|
num_ns_vc);
|
|
}
|
|
bi->offset += 2;
|
|
}
|
|
|
|
static void
|
|
decode_iei_num_ip4_endpoints(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint16 num_endpoints;
|
|
|
|
if (bi->nsip_tree) {
|
|
num_endpoints = tvb_get_ntohs(bi->tvb, bi->offset);
|
|
|
|
proto_tree_add_uint(bi->nsip_tree, hf_nsip_num_ip4_endpoints,
|
|
bi->tvb, ie_start_offset, ie->total_length,
|
|
num_endpoints);
|
|
}
|
|
bi->offset += 2;
|
|
}
|
|
|
|
static void
|
|
decode_iei_num_ip6_endpoints(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint16 num_endpoints;
|
|
|
|
if (bi->nsip_tree) {
|
|
num_endpoints = tvb_get_ntohs(bi->tvb, bi->offset);
|
|
|
|
proto_tree_add_uint(bi->nsip_tree, hf_nsip_num_ip6_endpoints,
|
|
bi->tvb, ie_start_offset, ie->total_length,
|
|
num_endpoints);
|
|
}
|
|
bi->offset += 2;
|
|
}
|
|
|
|
static void
|
|
decode_iei_reset_flag(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint8 flag;
|
|
proto_item *tf;
|
|
proto_tree *field_tree;
|
|
|
|
flag = tvb_get_guint8(bi->tvb, bi->offset);
|
|
if (bi->nsip_tree) {
|
|
|
|
tf = proto_tree_add_text(bi->nsip_tree, bi->tvb, ie_start_offset,
|
|
ie->total_length,
|
|
"Reset Flag: %#02x", flag);
|
|
|
|
field_tree = proto_item_add_subtree(tf, ett_nsip_reset_flag);
|
|
proto_tree_add_boolean(field_tree, hf_nsip_reset_flag, bi->tvb,
|
|
bi->offset, 1,
|
|
flag & NSIP_MASK_RESET_FLAG);
|
|
if (flag & NSIP_MASK_RESET_FLAG) {
|
|
col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
|
|
"Reset");
|
|
proto_item_append_text(bi->ti, ", Reset");
|
|
}
|
|
proto_tree_add_uint(field_tree, hf_nsip_reset_flag_spare,
|
|
bi->tvb, bi->offset, 1,
|
|
flag & NSIP_MASK_RESET_FLAG_SPARE);
|
|
}
|
|
bi->offset += 1;
|
|
}
|
|
|
|
static void
|
|
decode_iei_ip_address(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint8 addr_type;
|
|
guint32 ip4_addr;
|
|
struct e_in6_addr ip6_addr;
|
|
|
|
addr_type = tvb_get_guint8(bi->tvb, bi->offset);
|
|
proto_tree_add_item(bi->nsip_tree, hf_nsip_ip_address_type,
|
|
bi->tvb, bi->offset, 1, ENC_BIG_ENDIAN);
|
|
switch (addr_type) {
|
|
case NSIP_IP_ADDRESS_TYPE_IPV4:
|
|
ie->total_length = 2 + ipv4_element.address_length;
|
|
ip4_addr = tvb_get_ipv4(bi->tvb, bi->offset+1);
|
|
proto_tree_add_ipv4(bi->nsip_tree, hf_nsip_ip_address_ipv4,
|
|
bi->tvb, ie_start_offset, ie->total_length,
|
|
ip4_addr);
|
|
break;
|
|
case NSIP_IP_ADDRESS_TYPE_IPV6:
|
|
ie->total_length = 2 + ipv6_element.address_length;
|
|
tvb_get_ipv6(bi->tvb, bi->offset+1, &ip6_addr);
|
|
proto_tree_add_ipv6(bi->nsip_tree, hf_nsip_ip_address_ipv4,
|
|
bi->tvb, ie_start_offset, ie->total_length,
|
|
(guint8 *)&ip6_addr);
|
|
break;
|
|
default:
|
|
return; /* error */
|
|
}
|
|
bi->offset += ie->value_length;
|
|
}
|
|
|
|
static void
|
|
decode_iei_transaction_id(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint8 id;
|
|
id = tvb_get_guint8(bi->tvb, bi->offset);
|
|
proto_tree_add_uint(bi->nsip_tree, hf_nsip_transaction_id,
|
|
bi->tvb, ie_start_offset, ie->total_length, id);
|
|
col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
|
|
"Transaction Id: %d", id);
|
|
bi->offset += 1;
|
|
}
|
|
|
|
static void
|
|
decode_iei_end_flag(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint8 flag;
|
|
proto_item *tf;
|
|
proto_tree *field_tree;
|
|
|
|
if (bi->nsip_tree) {
|
|
flag = tvb_get_guint8(bi->tvb, bi->offset);
|
|
|
|
tf = proto_tree_add_text(bi->nsip_tree, bi->tvb, ie_start_offset,
|
|
ie->total_length,
|
|
"End Flag: %#02x", flag);
|
|
|
|
field_tree = proto_item_add_subtree(tf, ett_nsip_end_flag);
|
|
proto_tree_add_boolean(field_tree, hf_nsip_end_flag, bi->tvb,
|
|
bi->offset, 1,
|
|
flag & NSIP_MASK_END_FLAG);
|
|
if (flag & NSIP_MASK_END_FLAG) {
|
|
proto_item_append_text(bi->ti, ", End");
|
|
}
|
|
proto_tree_add_uint(field_tree, hf_nsip_end_flag_spare,
|
|
bi->tvb, bi->offset, 1,
|
|
flag & NSIP_MASK_END_FLAG_SPARE);
|
|
}
|
|
bi->offset += 1;
|
|
}
|
|
|
|
static void
|
|
decode_iei_control_bits(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
|
|
guint8 control_bits;
|
|
proto_item *tf;
|
|
proto_tree *field_tree;
|
|
|
|
control_bits = tvb_get_guint8(bi->tvb, bi->offset);
|
|
|
|
if (bi->nsip_tree) {
|
|
tf = proto_tree_add_text(bi->nsip_tree, bi->tvb, ie_start_offset,
|
|
ie->total_length,
|
|
"NS SDU Control bits: %#02x", control_bits);
|
|
|
|
field_tree = proto_item_add_subtree(tf, ett_nsip_control_bits);
|
|
proto_tree_add_boolean(field_tree, hf_nsip_control_bits_r, bi->tvb,
|
|
bi->offset, 1,
|
|
control_bits & NSIP_MASK_CONTROL_BITS_R);
|
|
proto_tree_add_boolean(field_tree, hf_nsip_control_bits_c, bi->tvb,
|
|
bi->offset, 1,
|
|
control_bits & NSIP_MASK_CONTROL_BITS_C);
|
|
proto_tree_add_uint(field_tree, hf_nsip_control_bits_spare,
|
|
bi->tvb, bi->offset, 1,
|
|
control_bits & NSIP_MASK_CONTROL_BITS_SPARE);
|
|
}
|
|
bi->offset++;
|
|
|
|
if (control_bits & NSIP_MASK_CONTROL_BITS_R) {
|
|
col_append_sep_str(bi->pinfo->cinfo, COL_INFO, NSIP_SEP, "Req CF");
|
|
proto_item_append_text(bi->ti, ", Request Change Flow");
|
|
}
|
|
|
|
if (control_bits & NSIP_MASK_CONTROL_BITS_C) {
|
|
col_append_sep_str(bi->pinfo->cinfo, COL_INFO, NSIP_SEP, "Conf CF");
|
|
proto_item_append_text(bi->ti, ", Confirm Change Flow");
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
decode_ie(nsip_ie_t *ie, build_info_t *bi) {
|
|
|
|
int org_offset = bi->offset;
|
|
|
|
if (tvb_length_remaining(bi->tvb, bi->offset) < 1) {
|
|
return;
|
|
}
|
|
switch (ie->format) {
|
|
case NSIP_IE_FORMAT_TLV:
|
|
if (!check_correct_iei(ie, bi)) {
|
|
return;
|
|
}
|
|
bi->offset++; /* Account for type */
|
|
ie->total_length = 1;
|
|
get_value_length(ie, bi);
|
|
break;
|
|
case NSIP_IE_FORMAT_TV:
|
|
if (!check_correct_iei(ie, bi)) {
|
|
return;
|
|
}
|
|
bi->offset++; /* Account for type */
|
|
ie->value_length = ie->total_length - 1;
|
|
break;
|
|
case NSIP_IE_FORMAT_V:
|
|
ie->value_length = ie->total_length;
|
|
default:
|
|
;
|
|
}
|
|
switch (ie->iei) {
|
|
case NSIP_IE_CAUSE:
|
|
decode_iei_cause(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_NS_VCI:
|
|
decode_iei_ns_vci(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_NS_PDU:
|
|
decode_iei_ns_pdu(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_NSEI:
|
|
decode_iei_nsei(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_BVCI:
|
|
decode_iei_bvci(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_IP4_ELEMENTS:
|
|
decode_ip_elements(&ipv4_element, ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_IP6_ELEMENTS:
|
|
decode_ip_elements(&ipv6_element, ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_MAX_NUM_NS_VC:
|
|
decode_iei_max_num_ns_vc(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_NUM_IP4_ENDPOINTS:
|
|
decode_iei_num_ip4_endpoints(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_NUM_IP6_ENDPOINTS:
|
|
decode_iei_num_ip6_endpoints(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_RESET_FLAG:
|
|
decode_iei_reset_flag(ie, bi, org_offset);
|
|
break;
|
|
case NSIP_IE_IP_ADDRESS:
|
|
decode_iei_ip_address(ie, bi, org_offset);
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
}
|
|
|
|
static void
|
|
decode_pdu_general(nsip_ie_t *ies, int num_ies, build_info_t *bi) {
|
|
int i;
|
|
for (i = 0; i < num_ies; i++) {
|
|
decode_ie(&ies[i], bi);
|
|
}
|
|
}
|
|
|
|
static void
|
|
decode_pdu_ns_unitdata(build_info_t *bi) {
|
|
tvbuff_t *next_tvb;
|
|
|
|
nsip_ie_t ies[] = {
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 1 }, /* Control bits */
|
|
{ NSIP_IE_BVCI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 2 },
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 0 },
|
|
/* NS SDU, length unknown */
|
|
};
|
|
gint sdu_length;
|
|
|
|
decode_iei_control_bits(ies, bi, bi->offset);
|
|
decode_pdu_general(&ies[1], 1, bi);
|
|
|
|
next_tvb = tvb_new_subset_remaining(bi->tvb, bi->offset);
|
|
if (bssgp_handle) {
|
|
call_dissector(bssgp_handle, next_tvb, bi->pinfo, bi->parent_tree);
|
|
}
|
|
else {
|
|
sdu_length = tvb_length_remaining(bi->tvb, bi->offset);
|
|
proto_tree_add_text(bi->nsip_tree, bi->tvb, bi->offset, sdu_length,
|
|
"NS SDU (%u bytes)", sdu_length);
|
|
}
|
|
}
|
|
|
|
static void
|
|
decode_pdu_ns_reset(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_CAUSE, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 3 },
|
|
{ NSIP_IE_NS_VCI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
};
|
|
decode_pdu_general(ies, 3, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_ns_reset_ack(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NS_VCI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
};
|
|
decode_pdu_general(ies, 2, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_ns_block(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_CAUSE, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 3 },
|
|
{ NSIP_IE_NS_VCI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
};
|
|
decode_pdu_general(ies, 2, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_ns_block_ack(build_info_t *bi) {
|
|
nsip_ie_t ies[] = { { NSIP_IE_NS_VCI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV,
|
|
0, 1 }, };
|
|
decode_pdu_general(ies, 1, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_ns_status(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_CAUSE, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 3 },
|
|
{ NSIP_IE_NS_VCI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_NS_PDU, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_BVCI, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_IP4_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_IP6_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
};
|
|
decode_pdu_general(ies, 6, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_ack(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 1 }, /* Transaction id */
|
|
{ NSIP_IE_CAUSE, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 3 },
|
|
{ NSIP_IE_IP_ADDRESS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_IP4_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
{ NSIP_IE_IP6_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
};
|
|
decode_pdu_general(ies, 1, bi);
|
|
decode_iei_transaction_id(&ies[1], bi, bi->offset);
|
|
decode_pdu_general(&ies[2], 4, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_add(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 1 }, /* Transaction id */
|
|
{ NSIP_IE_IP4_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_IP6_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
};
|
|
decode_pdu_general(ies, 1, bi);
|
|
decode_iei_transaction_id(&ies[1], bi, bi->offset);
|
|
decode_pdu_general(&ies[2], 2, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_changeweight(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 1 }, /* Transaction id */
|
|
{ NSIP_IE_IP4_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_IP6_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
};
|
|
decode_pdu_general(ies, 1, bi);
|
|
decode_iei_transaction_id(&ies[1], bi, bi->offset);
|
|
decode_pdu_general(&ies[2], 2, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_config(build_info_t *bi) {
|
|
|
|
nsip_ie_t ies[] = {
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 1 }, /* End flag */
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_IP4_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_IP6_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
/* Unknown length */
|
|
};
|
|
decode_iei_end_flag(ies, bi, bi->offset);
|
|
decode_pdu_general(&ies[1], 3, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_config_ack(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_CAUSE, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 3 },
|
|
};
|
|
decode_pdu_general(ies, 2, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_delete(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4}, /* CR013 */
|
|
{ 0, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_V, 0, 1 }, /* Transaction id */
|
|
{ NSIP_IE_IP_ADDRESS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TV, 0, 0 },
|
|
/* Unknown length */
|
|
{ NSIP_IE_IP4_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
{ NSIP_IE_IP6_ELEMENTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 0 },
|
|
};
|
|
decode_pdu_general(ies, 1, bi);
|
|
decode_iei_transaction_id(&ies[1], bi, bi->offset);
|
|
decode_pdu_general(&ies[2], 3, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_size(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_RESET_FLAG, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TV, 0, 2 },
|
|
{ NSIP_IE_MAX_NUM_NS_VC, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TV, 0, 3 },
|
|
{ NSIP_IE_NUM_IP4_ENDPOINTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TV,
|
|
0, 3 },
|
|
{ NSIP_IE_NUM_IP6_ENDPOINTS, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TV,
|
|
0, 3 },
|
|
};
|
|
decode_pdu_general(ies, 5, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu_sns_size_ack(build_info_t *bi) {
|
|
nsip_ie_t ies[] = {
|
|
{ NSIP_IE_NSEI, NSIP_IE_PRESENCE_M, NSIP_IE_FORMAT_TLV, 0, 4 },
|
|
{ NSIP_IE_CAUSE, NSIP_IE_PRESENCE_C, NSIP_IE_FORMAT_TLV, 0, 3 },
|
|
};
|
|
decode_pdu_general(ies, 2, bi);
|
|
}
|
|
|
|
static void
|
|
decode_pdu(guint8 pdu_type, build_info_t *bi) {
|
|
switch (pdu_type) {
|
|
case NSIP_PDU_NS_UNITDATA:
|
|
decode_pdu_ns_unitdata(bi);
|
|
break;
|
|
case NSIP_PDU_NS_RESET:
|
|
decode_pdu_ns_reset(bi);
|
|
break;
|
|
case NSIP_PDU_NS_RESET_ACK:
|
|
decode_pdu_ns_reset_ack(bi);
|
|
break;
|
|
case NSIP_PDU_NS_BLOCK:
|
|
decode_pdu_ns_block(bi);
|
|
break;
|
|
case NSIP_PDU_NS_BLOCK_ACK:
|
|
decode_pdu_ns_block_ack(bi);
|
|
break;
|
|
case NSIP_PDU_NS_STATUS:
|
|
decode_pdu_ns_status(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_ACK:
|
|
decode_pdu_sns_ack(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_ADD:
|
|
decode_pdu_sns_add(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_CHANGEWEIGHT:
|
|
decode_pdu_sns_changeweight(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_CONFIG:
|
|
decode_pdu_sns_config(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_CONFIG_ACK:
|
|
decode_pdu_sns_config_ack(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_DELETE:
|
|
decode_pdu_sns_delete(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_SIZE:
|
|
decode_pdu_sns_size(bi);
|
|
break;
|
|
case NSIP_PDU_SNS_SIZE_ACK:
|
|
decode_pdu_sns_size_ack(bi);
|
|
break;
|
|
case NSIP_PDU_NS_ALIVE:
|
|
case NSIP_PDU_NS_ALIVE_ACK:
|
|
case NSIP_PDU_NS_UNBLOCK:
|
|
case NSIP_PDU_NS_UNBLOCK_ACK:
|
|
/* Only contains PDU type, which has already been decoded */
|
|
default: ;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_nsip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
|
|
guint8 pdu_type;
|
|
build_info_t bi = { NULL, 0, NULL, NULL, NULL, NULL };
|
|
proto_tree *nsip_tree;
|
|
|
|
bi.tvb = tvb;
|
|
bi.pinfo = pinfo;
|
|
bi.parent_tree = tree;
|
|
|
|
pinfo->current_proto = "GPRS-NS";
|
|
|
|
if (!nsip_is_recursive) {
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "GPRS-NS");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
}
|
|
|
|
pdu_type = tvb_get_guint8(tvb, 0);
|
|
bi.offset++;
|
|
|
|
if (tree) {
|
|
bi.ti = proto_tree_add_item(tree, proto_nsip, tvb, 0, -1,
|
|
ENC_NA);
|
|
nsip_tree = proto_item_add_subtree(bi.ti, ett_nsip);
|
|
proto_tree_add_item(nsip_tree, hf_nsip_pdu_type, tvb, 0, 1, ENC_NA);
|
|
proto_item_append_text(bi.ti, ", PDU type: %s",
|
|
val_to_str_const(pdu_type, tab_nsip_pdu_types, "Unknown"));
|
|
bi.nsip_tree = nsip_tree;
|
|
}
|
|
|
|
if (!nsip_is_recursive) {
|
|
col_set_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str_const(pdu_type, tab_nsip_pdu_types, "Unknown PDU type"));
|
|
} else {
|
|
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NSIP_SEP, "%s",
|
|
val_to_str_const(pdu_type, tab_nsip_pdu_types, "Unknown PDU type"));
|
|
}
|
|
decode_pdu(pdu_type, &bi);
|
|
}
|
|
|
|
void
|
|
proto_register_nsip(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_nsip_cause,
|
|
{ "Cause", "nsip.cause",
|
|
FT_UINT8, BASE_OCT, VALS(tab_nsip_cause_values), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_ns_vci,
|
|
{ "NS-VCI", "nsip.ns_vci",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"Network Service Virtual Link Identifier", HFILL }
|
|
},
|
|
{ &hf_nsip_pdu_type,
|
|
{ "PDU type", "nsip.pdu_type",
|
|
FT_UINT8, BASE_OCT, VALS(tab_nsip_pdu_types), 0x0,
|
|
"PDU type information element", HFILL }
|
|
},
|
|
{ &hf_nsip_bvci,
|
|
{ "BVCI", "nsip.bvci",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"BSSGP Virtual Connection Identifier", HFILL }
|
|
},
|
|
{ &hf_nsip_nsei,
|
|
{ "NSEI", "nsip.nsei",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Network Service Entity Identifier", HFILL }
|
|
},
|
|
#if 0
|
|
{ &hf_nsip_ip4_elements,
|
|
{ "IP4 elements", "nsip.ip4_elements",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"List of IP4 elements", HFILL }
|
|
},
|
|
#endif
|
|
#if 0
|
|
{ &hf_nsip_ip6_elements,
|
|
{ "IP6 elements", "nsip.ip6_elements",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"List of IP6 elements", HFILL }
|
|
},
|
|
#endif
|
|
{ &hf_nsip_max_num_ns_vc,
|
|
{ "Maximum number of NS-VCs", "nsip.max_num_ns_vc",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_num_ip4_endpoints,
|
|
{ "Number of IP4 endpoints", "nsip.num_ip4_endpoints",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_num_ip6_endpoints,
|
|
{ "Number of IP6 endpoints", "nsip.num_ip6_endpoints",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_reset_flag,
|
|
{ "Reset flag", "nsip.reset_flag.flag",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), NSIP_MASK_RESET_FLAG,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_reset_flag_spare,
|
|
{ "Reset flag spare bits", "nsip.reset_flag.spare",
|
|
FT_UINT8, BASE_HEX, NULL, NSIP_MASK_RESET_FLAG_SPARE,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_ip_address_type,
|
|
{ "IP Address Type", "nsip.ip_address_type",
|
|
FT_UINT8, BASE_DEC, VALS(ip_address_type_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_ip_address_ipv4,
|
|
{ "IP Address", "nsip.ipv4_address",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_ip_address_ipv6,
|
|
{ "IP Address", "nsip.ipv6_address",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_end_flag,
|
|
{ "End flag", "nsip.end_flag.flag",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), NSIP_MASK_END_FLAG,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_end_flag_spare,
|
|
{ "End flag spare bits", "nsip.end_flag.spare",
|
|
FT_UINT8, BASE_HEX, NULL, NSIP_MASK_END_FLAG_SPARE,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_control_bits_r,
|
|
{ "Request change flow", "nsip.control_bits.r",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), NSIP_MASK_CONTROL_BITS_R,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_control_bits_c,
|
|
{ "Confirm change flow", "nsip.control_bits.c",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), NSIP_MASK_CONTROL_BITS_C,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_control_bits_spare,
|
|
{ "Spare bits", "nsip.control_bits.spare",
|
|
FT_UINT8, BASE_HEX, NULL, NSIP_MASK_CONTROL_BITS_SPARE,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_transaction_id,
|
|
{ "Transaction ID", "nsip.transaction_id",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
#if 0
|
|
{ &hf_nsip_ip_element_ip_address_ipv4,
|
|
{ "IP Address", "nsip.ip_element.ipv4_address",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
#endif
|
|
#if 0
|
|
{ &hf_nsip_ip_element_ip_address_ipv6,
|
|
{ "IP Address", "nsip.ip_element.ipv6_address",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
#endif
|
|
{ &hf_nsip_ip_element_udp_port,
|
|
{ "UDP Port", "nsip.ip_element.udp_port",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_ip_element_signalling_weight,
|
|
{ "Signalling Weight", "nsip.ip_element.signalling_weight",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_nsip_ip_element_data_weight,
|
|
{ "Data Weight", "nsip.ip_element.data_weight",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_nsip,
|
|
&ett_nsip_control_bits,
|
|
&ett_nsip_reset_flag,
|
|
&ett_nsip_end_flag,
|
|
&ett_nsip_ip_element,
|
|
&ett_nsip_ip_element_list,
|
|
};
|
|
|
|
module_t *nsip_module;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_nsip = proto_register_protocol("GPRS Network Service",
|
|
"GPRS-NS", "gprs-ns");
|
|
|
|
/* Required function calls to register the header fields and
|
|
subtrees used */
|
|
proto_register_field_array(proto_nsip, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector("gprs_ns", dissect_nsip, proto_nsip);
|
|
|
|
/* Set default UDP ports */
|
|
range_convert_str(&global_nsip_udp_port_range, DEFAULT_NSIP_PORT_RANGE, MAX_UDP_PORT);
|
|
|
|
/* Register configuration options */
|
|
nsip_module = prefs_register_protocol(proto_nsip, proto_reg_handoff_nsip);
|
|
prefs_register_obsolete_preference(nsip_module, "udp.port1");
|
|
prefs_register_obsolete_preference(nsip_module, "udp.port2");
|
|
prefs_register_range_preference(nsip_module, "udp.ports", "GPRS-NS UDP ports",
|
|
"UDP ports to be decoded as GPRS-NS (default: "
|
|
DEFAULT_NSIP_PORT_RANGE ")",
|
|
&global_nsip_udp_port_range, MAX_UDP_PORT);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_nsip(void) {
|
|
static gboolean nsip_prefs_initialized = FALSE;
|
|
static range_t *nsip_udp_port_range;
|
|
|
|
if (!nsip_prefs_initialized) {
|
|
nsip_handle = find_dissector("gprs_ns");
|
|
bssgp_handle = find_dissector("bssgp");
|
|
nsip_prefs_initialized = TRUE;
|
|
} else {
|
|
dissector_delete_uint_range("udp.port", nsip_udp_port_range, nsip_handle);
|
|
g_free(nsip_udp_port_range);
|
|
}
|
|
|
|
nsip_udp_port_range = range_copy(global_nsip_udp_port_range);
|
|
|
|
dissector_add_uint_range("udp.port", nsip_udp_port_range, nsip_handle);
|
|
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 2
|
|
* tab-width: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=2 tabstop=4 expandtab:
|
|
* :indentSize=2:tabSize=4:noTabs=true:
|
|
*/
|