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wireshark/epan/dissectors/packet-nsip.c

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/* packet-nsip.c
* Routines for Network Service Over IP dissection
* Copyright 2000, Susanne Edlund <susanne.edlund@ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* 3GPP TS 48.016 V 5.3.0 (2004-07) Release 6 + CR013 */
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/to_str.h>
#include <wiretap/wtap.h>
void proto_register_nsip(void);
void proto_reg_handoff_nsip(void);
#define NSIP_DEBUG 0
#define NSIP_SEP ", " /* Separator string */
#define DEFAULT_NSIP_PORT_RANGE "2157,19999" /* Not IANA registered */
/* Initialize the protocol and registered fields */
static int proto_nsip = -1;
static int hf_nsip_cause = -1;
static int hf_nsip_ns_vci = -1;
static int hf_nsip_pdu_type = -1;
static int hf_nsip_bvci = -1;
static int hf_nsip_nsei = -1;
/* static int hf_nsip_ip4_elements = -1; */
/* static int hf_nsip_ip6_elements = -1; */
static int hf_nsip_max_num_ns_vc = -1;
static int hf_nsip_num_ip4_endpoints = -1;
static int hf_nsip_num_ip6_endpoints = -1;
static int hf_nsip_reset_flag = -1;
static int hf_nsip_reset_flag_bit = -1;
static int hf_nsip_reset_flag_spare = -1;
static int hf_nsip_ip_address_type = -1;
static int hf_nsip_ip_address_ipv4 = -1;
static int hf_nsip_ip_address_ipv6 = -1;
static int hf_nsip_end_flag = -1;
static int hf_nsip_end_flag_bit = -1;
static int hf_nsip_end_flag_spare = -1;
static int hf_nsip_control_bits = -1;
static int hf_nsip_control_bits_r = -1;
static int hf_nsip_control_bits_c = -1;
static int hf_nsip_control_bits_spare = -1;
static int hf_nsip_transaction_id = -1;
/* static int hf_nsip_ip_element_ip_address_ipv4 = -1; */
/* static int hf_nsip_ip_element_ip_address_ipv6 = -1; */
static int hf_nsip_ip_element_udp_port = -1;
static int hf_nsip_ip_element_signalling_weight = -1;
static int hf_nsip_ip_element_data_weight = -1;
static int hf_nsip_ns_pdu = -1;
static int hf_nsip_ns_sdu = -1;
/* Initialize the subtree pointers */
static gint ett_nsip = -1;
static gint ett_nsip_control_bits = -1;
static gint ett_nsip_reset_flag = -1;
static gint ett_nsip_end_flag = -1;
static gint ett_nsip_ip_element = -1;
static gint ett_nsip_ip_element_list = -1;
/* PDU type coding, v5.3.0, table 10.3.7.1, p 51 */
#define NSIP_PDU_NS_UNITDATA 0x00
#define NSIP_PDU_NS_RESET 0x02
#define NSIP_PDU_NS_RESET_ACK 0x03
#define NSIP_PDU_NS_BLOCK 0x04
#define NSIP_PDU_NS_BLOCK_ACK 0x05
#define NSIP_PDU_NS_UNBLOCK 0x06
#define NSIP_PDU_NS_UNBLOCK_ACK 0x07
#define NSIP_PDU_NS_STATUS 0x08
#define NSIP_PDU_NS_ALIVE 0x0a
#define NSIP_PDU_NS_ALIVE_ACK 0x0b
#define NSIP_PDU_SNS_ACK 0x0c
#define NSIP_PDU_SNS_ADD 0x0d
#define NSIP_PDU_SNS_CHANGEWEIGHT 0x0e
#define NSIP_PDU_SNS_CONFIG 0x0f
#define NSIP_PDU_SNS_CONFIG_ACK 0x10
#define NSIP_PDU_SNS_DELETE 0x11
#define NSIP_PDU_SNS_SIZE 0x12
#define NSIP_PDU_SNS_SIZE_ACK 0x13
static const value_string tab_nsip_pdu_types[] = {
{ NSIP_PDU_NS_UNITDATA, "NS_UNITDATA" },
{ NSIP_PDU_NS_RESET, "NS_RESET" },
{ NSIP_PDU_NS_RESET_ACK, "NS_RESET_ACK" },
{ NSIP_PDU_NS_BLOCK, "NS_BLOCK" },
{ NSIP_PDU_NS_BLOCK_ACK, "NS_BLOCK_ACK" },
{ NSIP_PDU_NS_UNBLOCK, "NS_UNBLOCK" },
{ NSIP_PDU_NS_UNBLOCK_ACK, "NS_UNBLOCK_ACK" },
{ NSIP_PDU_NS_STATUS, "NS_STATUS" },
{ NSIP_PDU_NS_ALIVE, "NS_ALIVE" },
{ NSIP_PDU_NS_ALIVE_ACK, "NS_ALIVE_ACK" },
{ NSIP_PDU_SNS_ACK, "SNS_ACK" },
{ NSIP_PDU_SNS_ADD, "SNS_ADD" },
{ NSIP_PDU_SNS_CHANGEWEIGHT, "SNS_CHANGEWEIGHT" },
{ NSIP_PDU_SNS_CONFIG, "SNS_CONFIG" },
{ NSIP_PDU_SNS_CONFIG_ACK, "SNS_CONFIG_ACK" },
{ NSIP_PDU_SNS_DELETE, "SNS_DELETE" },
{ NSIP_PDU_SNS_SIZE, "SNS_SIZE" },
{ NSIP_PDU_SNS_SIZE_ACK, "SNS_SIZE_ACK" },
{ 0, NULL },
};
/* Information element coding, v 5.3.0, table 10.3.1, p 46 */
#define NSIP_IE_CAUSE 0x00
#define NSIP_IE_NS_VCI 0x01
#define NSIP_IE_NS_PDU 0x02
#define NSIP_IE_BVCI 0x03
#define NSIP_IE_NSEI 0x04
#define NSIP_IE_IP4_ELEMENTS 0x05
#define NSIP_IE_IP6_ELEMENTS 0x06
#define NSIP_IE_MAX_NUM_NS_VC 0x07
#define NSIP_IE_NUM_IP4_ENDPOINTS 0x08
#define NSIP_IE_NUM_IP6_ENDPOINTS 0x09
#define NSIP_IE_RESET_FLAG 0x0a
#define NSIP_IE_IP_ADDRESS 0x0b
#if NSIP_DEBUG
static const value_string tab_nsip_ieis[] = {
{ NSIP_IE_CAUSE, "Cause" },
{ NSIP_IE_NS_VCI, "NS-VCI" },
{ NSIP_IE_NS_PDU, "NS PDU" },
{ NSIP_IE_BVCI, "BVCI" },
{ NSIP_IE_NSEI, "NSEI" },
{ NSIP_IE_IP4_ELEMENTS, "List of IP4 Elements" },
{ NSIP_IE_IP6_ELEMENTS, "List of IP6 Elements" },
{ NSIP_IE_MAX_NUM_NS_VC, "Maximum Number of NC-VCs" },
{ NSIP_IE_NUM_IP4_ENDPOINTS, "Number of IP4 Endpoints" },
{ NSIP_IE_NUM_IP6_ENDPOINTS, "Number of IP6 Endpoints"},
{ NSIP_IE_RESET_FLAG, "Reset Flag" },
{ NSIP_IE_IP_ADDRESS, "IP Address" },
{ 0, NULL },
};
#endif
/* Cause values, v 5.3.0, table 10.3.2.1, p 47 */
#define NSIP_CAUSE_TRANSIT_NETWORK_FAILURE 0x00
#define NSIP_CAUSE_OM_INTERVENTION 0x01
#define NSIP_CAUSE_EQUIPMENT_FAILURE 0x02
#define NSIP_CAUSE_NS_VC_BLOCKED 0x03
#define NSIP_CAUSE_NS_VC_UNKNOWN 0x04
#define NSIP_CAUSE_BVCI_UNKNOWN 0x05
#define NSIP_CAUSE_SEMANTICALLY_INCORRECT_PDU 0x08
#define NSIP_CAUSE_NSIP_PDU_NOT_COMPATIBLE 0x0a
#define NSIP_CAUSE_PROTOCOL_ERROR 0x0b
#define NSIP_CAUSE_INVALID_ESSENTIAL_IE 0x0c
#define NSIP_CAUSE_MISSING_ESSENTIAL_IE 0x0d
#define NSIP_CAUSE_INVALID_NUM_IP4_ENDPOINTS 0x0e
#define NSIP_CAUSE_INVALID_NUM_IP6_ENDPOINTS 0x0f
#define NSIP_CAUSE_INVALID_NUM_NS_VC 0x10
#define NSIP_CAUSE_INVALID_WEIGHTS 0x11
#define NSIP_CAUSE_UNKNOWN_IP_ENDPOINT 0x12
#define NSIP_CAUSE_UNKNOWN_IP_ADDRESS 0x13
#define NSIP_CAUSE_IP_TEST_FAILED 0x14
static const value_string tab_nsip_cause_values[] = {
{ NSIP_CAUSE_TRANSIT_NETWORK_FAILURE, "Transit network failure" },
{ NSIP_CAUSE_OM_INTERVENTION, "O&M intervention" },
{ NSIP_CAUSE_EQUIPMENT_FAILURE, "Equipment failure" },
{ NSIP_CAUSE_NS_VC_BLOCKED, "NS-VC blocked" },
{ NSIP_CAUSE_NS_VC_UNKNOWN, "NS-VC unknown" },
{ NSIP_CAUSE_BVCI_UNKNOWN, "BVCI unknown on that NSE" },
{ NSIP_CAUSE_SEMANTICALLY_INCORRECT_PDU, "Semantically incorrect PDU" },
{ NSIP_CAUSE_NSIP_PDU_NOT_COMPATIBLE, "PDU not compatible with the protocol state" },
{ NSIP_CAUSE_PROTOCOL_ERROR, "Protocol error - unspecified" },
{ NSIP_CAUSE_INVALID_ESSENTIAL_IE, "Invalid essential IE" },
{ NSIP_CAUSE_MISSING_ESSENTIAL_IE, "Missing essential IE" },
{ NSIP_CAUSE_INVALID_NUM_IP4_ENDPOINTS, "Invalid number of IP4 endpoints" },
{ NSIP_CAUSE_INVALID_NUM_IP6_ENDPOINTS, "Invalid number of IP6 endpoints" },
{ NSIP_CAUSE_INVALID_NUM_NS_VC, "Invalid number of NS-VCs" },
{ NSIP_CAUSE_INVALID_WEIGHTS, "Invalid weights" },
{ NSIP_CAUSE_UNKNOWN_IP_ENDPOINT, "Unknown IP endpoint" },
{ NSIP_CAUSE_UNKNOWN_IP_ADDRESS, "Unknown IP address" },
{ NSIP_CAUSE_IP_TEST_FAILED, "IP test failed" },
{ 0, NULL },
};
/* Presence requirements of Information Elements
v 5.3.0, chapter 8.1.1, p. 35 */
#define NSIP_IE_PRESENCE_M 1 /* Mandatory */
#define NSIP_IE_PRESENCE_O 2 /* Conditional */
#define NSIP_IE_PRESENCE_C 3 /* Optional */
/* Format options */
#define NSIP_IE_FORMAT_V 1
#define NSIP_IE_FORMAT_TV 2
#define NSIP_IE_FORMAT_TLV 3
/* IP address types, v 5.3.0, chapter 10.3.2b, p. 48 */
#define NSIP_IP_ADDRESS_TYPE_IPV4 1
#define NSIP_IP_ADDRESS_TYPE_IPV6 2
#define NSIP_IP_VERSION_4 4
#define NSIP_IP_VERSION_6 6
static const value_string ip_address_type_vals[] = {
{ 0, "Reserved" },
{ NSIP_IP_ADDRESS_TYPE_IPV4, "IPv4 Address" },
{ NSIP_IP_ADDRESS_TYPE_IPV6, "IPv6 Address" },
{ 0, NULL },
};
#define NSIP_MASK_CONTROL_BITS_R 0x01
#define NSIP_MASK_CONTROL_BITS_C 0x02
#define NSIP_MASK_CONTROL_BITS_SPARE 0xFC
#define NSIP_MASK_END_FLAG 0x01
#define NSIP_MASK_END_FLAG_SPARE 0xFE
#define NSIP_MASK_RESET_FLAG 0x01
#define NSIP_MASK_RESET_FLAG_SPARE 0xFE
static dissector_handle_t bssgp_handle;
static dissector_handle_t nsip_handle;
static gboolean nsip_is_recursive = FALSE;
typedef struct {
guint8 iei;
guint8 presence_req;
int format;
guint16 value_length; /* in bytes */
guint16 total_length; /* as specified, or 0 if unspecified */
} nsip_ie_t;
typedef struct {
tvbuff_t *tvb;
int offset;
packet_info *pinfo;
proto_tree *nsip_tree;
proto_tree *parent_tree;
proto_item *ti;
} build_info_t;
typedef struct {
int version;
int address_length;
int total_length;
} nsip_ip_element_info_t;
static nsip_ip_element_info_t ipv4_element = { NSIP_IP_VERSION_4, 4, 8 };
static nsip_ip_element_info_t ipv6_element = { NSIP_IP_VERSION_6, 16, 20 };
static void
get_value_length(nsip_ie_t *ie, build_info_t *bi) {
/* length indicator in bit 8, 0 => two bytes, 1 => one byte */
const guint8 MASK_LENGTH_INDICATOR = 0x80;
const guint8 MASK_ONE_BYTE_LENGTH = 0x7f;
guint8 length_len;
guint16 length;
length = tvb_get_guint8(bi->tvb, bi->offset);
length_len = 1;
if (length & MASK_LENGTH_INDICATOR) {
length &= MASK_ONE_BYTE_LENGTH;
}
else {
length_len++;
length <<= 8;
length |= tvb_get_guint8(bi->tvb, bi->offset+1);
}
ie->value_length = length;
ie->total_length += length_len + length;
bi->offset += length_len;
}
static int
check_correct_iei(nsip_ie_t *ie, build_info_t *bi) {
guint8 fetched_iei = tvb_get_guint8(bi->tvb, bi->offset);
#if NSIP_DEBUG
if (fetched_iei != ie->iei) {
proto_tree_add_debug(bi->nsip_tree, bi->tvb, bi->offset, 1,
"Tried IEI %s (%#02x), found IEI %s (%#02x)",
val_to_str_const(ie->iei, tab_nsip_ieis, "Unknown"),
ie->iei,
val_to_str_const(fetched_iei, tab_nsip_ieis, "Unknown"),
fetched_iei);
}
#endif
return (fetched_iei == ie->iei);
}
static void
decode_iei_cause(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
guint8 cause;
cause = tvb_get_guint8(bi->tvb, bi->offset);
proto_tree_add_uint(bi->nsip_tree, hf_nsip_cause,
bi->tvb, ie_start_offset, ie->total_length,
cause);
col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
"Cause: %s",
val_to_str(cause, tab_nsip_cause_values, "Unknown (0x%02x)"));
proto_item_append_text(bi->ti, ", Cause: %s",
val_to_str(cause, tab_nsip_cause_values, "Unknown (0x%02x)"));
bi->offset += ie->value_length;
}
static void
decode_iei_ns_vci(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
guint16 ns_vci;
ns_vci = tvb_get_ntohs(bi->tvb, bi->offset);
proto_tree_add_uint(bi->nsip_tree, hf_nsip_ns_vci,
bi->tvb, ie_start_offset, ie->total_length,
ns_vci);
col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
"NS VCI: %#04x", ns_vci);
proto_item_append_text(bi->ti, ", NS VCI: %#04x", ns_vci);
bi->offset += ie->value_length;
}
static void
decode_iei_ns_pdu(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
tvbuff_t * next_tvb;
proto_tree_add_bytes_format(bi->nsip_tree, hf_nsip_ns_pdu, bi->tvb, ie_start_offset,
ie->total_length, NULL,
"NS PDU (%u bytes)", ie->value_length);
next_tvb = tvb_new_subset_length_caplen(bi->tvb, bi->offset, ie->value_length, -1);
if (nsip_handle) {
gboolean was_recursive;
was_recursive = nsip_is_recursive;
nsip_is_recursive = TRUE;
call_dissector(nsip_handle, next_tvb, bi->pinfo, bi->nsip_tree);
nsip_is_recursive = was_recursive;
}
bi->offset += ie->value_length;
}
static void
decode_iei_nsei(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
guint16 nsei = tvb_get_ntohs(bi->tvb, bi->offset);
proto_tree_add_uint(bi->nsip_tree, hf_nsip_nsei, bi->tvb,
ie_start_offset, ie->total_length, nsei);
bi->offset += ie->value_length;
col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
"NSEI %u", nsei);
proto_item_append_text(bi->ti, ", NSEI %u", nsei);
}
static void
decode_iei_bvci(nsip_ie_t *ie, build_info_t *bi, int ie_start_offset) {
guint16 bvci = tvb_get_ntohs(bi->tvb, bi->offset);
proto_tree_add_uint(bi->nsip_tree, hf_nsip_bvci, bi->tvb,
ie_start_offset, ie->total_length, bvci);
bi->offset += ie->value_length;
col_append_sep_fstr(bi->pinfo->cinfo, COL_INFO, NSIP_SEP,
"BVCI %u", bvci);
proto_item_append_text(bi->ti, ", BVCI %u", bvci);
}
static proto_item *
decode_ip_element(nsip_ip_element_info_t *element, build_info_t *bi, proto_tree * element_tree) {
guint16 udp_port;
proto_item *tf;
proto_tree *field_tree;
field_tree = proto_tree_add_subtree(element_tree, bi->tvb, bi->offset,
element->total_length, ett_nsip_ip_element, &tf, "IP Element");
if (bi->nsip_tree) {
/* IP address */
switch (element->version) {
case NSIP_IP_VERSION_4:
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",
tvb_ip_to_str(bi->tvb, bi->offset));
break;
case NSIP_IP_VERSION_6:
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",
tvb_ip6_to_str(bi->tvb, bi->offset));
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;
field_tree = proto_tree_add_subtree_format(bi->nsip_tree, bi->tvb, ie_start_offset,
ie->total_length, ett_nsip_ip_element_list, &tf,
"List of IP%u Elements (%u Elements)",
element->version, num_elements);
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 _U_, build_info_t *bi, int ie_start_offset _U_) {
guint8 flag;
static int * const reset_flags[] = {
&hf_nsip_reset_flag_bit,
&hf_nsip_reset_flag_spare,
NULL
};
flag = tvb_get_guint8(bi->tvb, bi->offset);
proto_tree_add_bitmask(bi->nsip_tree, bi->tvb, bi->offset, hf_nsip_reset_flag,
ett_nsip_reset_flag, reset_flags, ENC_NA);
if (flag & NSIP_MASK_RESET_FLAG) {
col_append_sep_str(bi->pinfo->cinfo, COL_INFO, NSIP_SEP, "Reset");
}
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;
ws_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,
&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 _U_, build_info_t *bi, int ie_start_offset) {
static int * const end_flags[] = {
&hf_nsip_end_flag_bit,
&hf_nsip_end_flag_spare,
NULL
};
proto_tree_add_bitmask(bi->nsip_tree, bi->tvb, ie_start_offset, hf_nsip_end_flag,
ett_nsip_end_flag, end_flags, ENC_NA);
bi->offset += 1;
}
static void
decode_iei_control_bits(nsip_ie_t *ie _U_, build_info_t *bi, int ie_start_offset) {
guint8 control_bits;
static int * const flags[] = {
&hf_nsip_control_bits_r,
&hf_nsip_control_bits_c,
&hf_nsip_control_bits_spare,
NULL
};
control_bits = tvb_get_guint8(bi->tvb, bi->offset);
proto_tree_add_bitmask(bi->nsip_tree, bi->tvb, ie_start_offset, hf_nsip_control_bits,
ett_nsip_control_bits, flags, ENC_NA);
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_captured_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_captured_length_remaining(bi->tvb, bi->offset);
proto_tree_add_bytes_format(bi->nsip_tree, hf_nsip_ns_sdu, bi->tvb, bi->offset, sdu_length,
NULL, "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 int
dissect_nsip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) {
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;
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_BIG_ENDIAN);
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_str(pinfo->cinfo, COL_INFO, NSIP_SEP,
val_to_str_const(pdu_type, tab_nsip_pdu_types, "Unknown PDU type"));
}
decode_pdu(pdu_type, &bi);
return tvb_captured_length(tvb);
}
void
proto_register_nsip(void)
{
static hf_register_info hf[] = {
{ &hf_nsip_cause,
{ "Cause", "nsip.cause",
FT_UINT8, BASE_HEX, 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_HEX, 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",
FT_UINT8, BASE_HEX, NULL, 0,
NULL, HFILL }
},
{ &hf_nsip_reset_flag_bit,
{ "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",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nsip_end_flag_bit,
{ "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,
{ "NS SDU Control bits", "nsip.control_bits",
FT_UINT8, BASE_HEX, NULL, 0x0,
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 }
},
{ &hf_nsip_ns_pdu,
{ "NS PDU", "nsip.ns_pdu",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nsip_ns_sdu,
{ "NS SDU", "nsip.ns_sdu",
FT_BYTES, BASE_NONE, 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);
/* Register configuration options */
nsip_module = prefs_register_protocol(proto_nsip, NULL);
/* For reading older preference files with "nsip." preferences */
prefs_register_module_alias("nsip", nsip_module);
prefs_register_obsolete_preference(nsip_module, "udp.port1");
prefs_register_obsolete_preference(nsip_module, "udp.port2");
}
void
proto_reg_handoff_nsip(void) {
nsip_handle = find_dissector_add_dependency("gprs_ns", proto_nsip);
bssgp_handle = find_dissector_add_dependency("bssgp", proto_nsip);
dissector_add_uint_range_with_preference("udp.port", DEFAULT_NSIP_PORT_RANGE, nsip_handle);
dissector_add_uint("atm.aal5.type", TRAF_GPRS_NS, nsip_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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