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wireshark/epan/dissectors/packet-atm.c

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/* packet-atm.c
* Routines for ATM packet disassembly
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/capture_dissectors.h>
#include <wsutil/pint.h>
#include <epan/oui.h>
#include <epan/addr_resolv.h>
#include <epan/ppptypes.h>
#include <epan/expert.h>
#include <epan/crc10-tvb.h>
#include <epan/crc32-tvb.h>
#include <epan/decode_as.h>
#include "packet-atm.h"
#include "packet-snmp.h"
#include "packet-eth.h"
#include "packet-tr.h"
#include "packet-llc.h"
#include <epan/prefs.h>
#include "packet-pw-atm.h"
void proto_register_atm(void);
void proto_reg_handoff_atm(void);
static int proto_atm = -1;
static int hf_atm_aal = -1;
static int hf_atm_gfc = -1;
static int hf_atm_vpi = -1;
static int hf_atm_vci = -1;
static int hf_atm_cid = -1;
static int hf_atm_reserved = -1;
static int proto_atm_lane = -1;
static int proto_ilmi = -1;
static int proto_aal1 = -1;
static int proto_aal3_4 = -1;
static int proto_oamaal = -1;
static int hf_atm_le_client_client = -1;
static int hf_atm_lan_destination_tag = -1;
static int hf_atm_lan_destination_mac = -1;
static int hf_atm_le_control_tlv_type = -1;
static int hf_atm_le_control_tlv_length = -1;
static int hf_atm_lan_destination_route_desc = -1;
static int hf_atm_lan_destination_lan_id = -1;
static int hf_atm_lan_destination_bridge_num = -1;
static int hf_atm_source_atm = -1;
static int hf_atm_target_atm = -1;
static int hf_atm_le_configure_join_frame_lan_type = -1;
static int hf_atm_le_configure_join_frame_max_frame_size = -1;
static int hf_atm_le_configure_join_frame_num_tlvs = -1;
static int hf_atm_le_configure_join_frame_elan_name_size = -1;
static int hf_atm_le_configure_join_frame_elan_name = -1;
static int hf_atm_le_registration_frame_num_tlvs = -1;
static int hf_atm_le_arp_frame_num_tlvs = -1;
static int hf_atm_le_verify_frame_num_tlvs = -1;
static int hf_atm_le_control_marker = -1;
static int hf_atm_le_control_protocol = -1;
static int hf_atm_le_control_version = -1;
static int hf_atm_le_control_opcode = -1;
static int hf_atm_le_control_status = -1;
static int hf_atm_le_control_transaction_id = -1;
static int hf_atm_le_control_requester_lecid = -1;
static int hf_atm_le_control_flags = -1;
static int hf_atm_le_control_flag_v2_capable = -1;
static int hf_atm_le_control_flag_selective_multicast = -1;
static int hf_atm_le_control_flag_v2_required = -1;
static int hf_atm_le_control_flag_proxy = -1;
static int hf_atm_le_control_flag_exclude_explorer_frames = -1;
static int hf_atm_le_control_flag_address = -1;
static int hf_atm_le_control_topology_change = -1;
static int hf_atm_traffic_type = -1;
static int hf_atm_traffic_vcmx = -1;
static int hf_atm_traffic_lane = -1;
static int hf_atm_traffic_ipsilon = -1;
static int hf_atm_cells = -1;
static int hf_atm_aal5_uu = -1;
static int hf_atm_aal5_cpi = -1;
static int hf_atm_aal5_len = -1;
static int hf_atm_aal5_crc = -1;
static int hf_atm_payload_type = -1;
static int hf_atm_cell_loss_priority = -1;
static int hf_atm_header_error_check = -1;
static int hf_atm_channel = -1;
static int hf_atm_aa1_csi = -1;
static int hf_atm_aa1_seq_count = -1;
static int hf_atm_aa1_crc = -1;
static int hf_atm_aa1_parity = -1;
static int hf_atm_aa1_payload = -1;
static int hf_atm_aal3_4_seg_type = -1;
static int hf_atm_aal3_4_seq_num = -1;
static int hf_atm_aal3_4_multiplex_id = -1;
static int hf_atm_aal3_4_information = -1;
static int hf_atm_aal3_4_length_indicator = -1;
static int hf_atm_aal3_4_crc = -1;
static int hf_atm_aal_oamcell_type = -1;
static int hf_atm_aal_oamcell_type_fm = -1;
static int hf_atm_aal_oamcell_type_pm = -1;
static int hf_atm_aal_oamcell_type_ad = -1;
static int hf_atm_aal_oamcell_type_ft = -1;
static int hf_atm_aal_oamcell_func_spec = -1;
static int hf_atm_aal_oamcell_crc = -1;
static int hf_atm_padding = -1;
static gint ett_atm = -1;
static gint ett_atm_lane = -1;
static gint ett_atm_lane_lc_lan_dest = -1;
static gint ett_atm_lane_lc_lan_dest_rd = -1;
static gint ett_atm_lane_lc_flags = -1;
static gint ett_atm_lane_lc_tlv = -1;
static gint ett_ilmi = -1;
static gint ett_aal1 = -1;
static gint ett_aal3_4 = -1;
static gint ett_oamaal = -1;
static expert_field ei_atm_reassembly_failed = EI_INIT;
static dissector_handle_t atm_handle;
static dissector_handle_t atm_untruncated_handle;
static dissector_handle_t eth_withoutfcs_handle;
static dissector_handle_t tr_handle;
static dissector_handle_t fr_handle;
static dissector_handle_t llc_handle;
static dissector_handle_t sscop_handle;
static dissector_handle_t ppp_handle;
static dissector_handle_t eth_maybefcs_handle;
static dissector_handle_t ip_handle;
static gboolean dissect_lanesscop = FALSE;
static dissector_table_t atm_type_aal2_table;
static dissector_table_t atm_type_aal5_table;
static dissector_table_t atm_cell_payload_vpi_vci_table;
static dissector_table_t atm_reassembled_vpi_vci_table;
/*
* See
*
* https://www.broadband-forum.org/index.php?option=com_sppagebuilder&view=page&id=185
*
* for a number of ATM Forum specifications, e.g. the LAN Emulation
* over ATM 1.0 spec, whence I got most of this.
*/
/* LE Control opcodes */
#define LE_CONFIGURE_REQUEST 0x0001
#define LE_CONFIGURE_RESPONSE 0x0101
#define LE_JOIN_REQUEST 0x0002
#define LE_JOIN_RESPONSE 0x0102
#define READY_QUERY 0x0003
#define READY_IND 0x0103
#define LE_REGISTER_REQUEST 0x0004
#define LE_REGISTER_RESPONSE 0x0104
#define LE_UNREGISTER_REQUEST 0x0005
#define LE_UNREGISTER_RESPONSE 0x0105
#define LE_ARP_REQUEST 0x0006
#define LE_ARP_RESPONSE 0x0106
#define LE_FLUSH_REQUEST 0x0007
#define LE_FLUSH_RESPONSE 0x0107
#define LE_NARP_REQUEST 0x0008
#define LE_TOPOLOGY_REQUEST 0x0009
#define LE_VERIFY_REQUEST 0x000A
#define LE_VERIFY_RESPONSE 0x010A
static const value_string le_control_opcode_vals[] = {
{ LE_CONFIGURE_REQUEST, "LE_CONFIGURE_REQUEST" },
{ LE_CONFIGURE_RESPONSE, "LE_CONFIGURE_RESPONSE" },
{ LE_JOIN_REQUEST, "LE_JOIN_REQUEST" },
{ LE_JOIN_RESPONSE, "LE_JOIN_RESPONSE" },
{ READY_QUERY, "READY_QUERY" },
{ READY_IND, "READY_IND" },
{ LE_REGISTER_REQUEST, "LE_REGISTER_REQUEST" },
{ LE_REGISTER_RESPONSE, "LE_REGISTER_RESPONSE" },
{ LE_UNREGISTER_REQUEST, "LE_UNREGISTER_REQUEST" },
{ LE_UNREGISTER_RESPONSE, "LE_UNREGISTER_RESPONSE" },
{ LE_ARP_REQUEST, "LE_ARP_REQUEST" },
{ LE_ARP_RESPONSE, "LE_ARP_RESPONSE" },
{ LE_FLUSH_REQUEST, "LE_FLUSH_REQUEST" },
{ LE_FLUSH_RESPONSE, "LE_FLUSH_RESPONSE" },
{ LE_NARP_REQUEST, "LE_NARP_REQUEST" },
{ LE_TOPOLOGY_REQUEST, "LE_TOPOLOGY_REQUEST" },
{ LE_VERIFY_REQUEST, "LE_VERIFY_REQUEST" },
{ LE_VERIFY_RESPONSE, "LE_VERIFY_RESPONSE" },
{ 0, NULL }
};
/* LE Control statuses */
static const value_string le_control_status_vals[] = {
{ 0, "Success" },
{ 1, "Version not supported" },
{ 2, "Invalid request parameters" },
{ 4, "Duplicate LAN destination registration" },
{ 5, "Duplicate ATM address" },
{ 6, "Insufficient resources to grant request" },
{ 7, "Access denied" },
{ 8, "Invalid REQUESTOR-ID" },
{ 9, "Invalid LAN destination" },
{ 10, "Invalid ATM address" },
{ 20, "No configuration" },
{ 21, "LE_CONFIGURE error" },
{ 22, "Insufficient information" },
{ 24, "TLV not found" },
{ 0, NULL }
};
/* LE Control LAN destination tags */
#define TAG_NOT_PRESENT 0x0000
#define TAG_MAC_ADDRESS 0x0001
#define TAG_ROUTE_DESCRIPTOR 0x0002
static const value_string le_control_landest_tag_vals[] = {
{ TAG_NOT_PRESENT, "Not present" },
{ TAG_MAC_ADDRESS, "MAC address" },
{ TAG_ROUTE_DESCRIPTOR, "Route descriptor" },
{ 0, NULL }
};
/* LE Control LAN types */
#define LANT_UNSPEC 0x00
#define LANT_802_3 0x01
#define LANT_802_5 0x02
static const value_string le_control_lan_type_vals[] = {
{ LANT_UNSPEC, "Unspecified" },
{ LANT_802_3, "Ethernet/802.3" },
{ LANT_802_5, "802.5" },
{ 0, NULL }
};
static const value_string le_control_frame_size_vals[] = {
{ 0x00, "Unspecified" },
{ 0x01, "1516/1528/1580/1592" },
{ 0x02, "4544/4556/1580/1592" },
{ 0x03, "9234/9246" },
{ 0x04, "18190/18202" },
{ 0, NULL }
};
static const value_string atm_channel_vals[] = {
{ 0, "DTE->DCE" },
{ 1, "DCE->DTE" },
{ 0, NULL }
};
static const true_false_string tfs_remote_local = { "Remote", "Local" };
static const true_false_string tfs_low_high_priority = { "Low priority", "High priority" };
static void
dissect_le_client(tvbuff_t *tvb, proto_tree *tree)
{
proto_item *ti;
proto_tree *lane_tree;
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_atm_lane, tvb, 0, 2, "ATM LANE");
lane_tree = proto_item_add_subtree(ti, ett_atm_lane);
proto_tree_add_item(lane_tree, hf_atm_le_client_client, tvb, 0, 2, ENC_BIG_ENDIAN );
}
}
static void
dissect_lan_destination(tvbuff_t *tvb, int offset, const char *type, proto_tree *tree)
{
proto_item *td;
proto_tree *dest_tree;
guint16 tag;
proto_tree *rd_tree;
dest_tree = proto_tree_add_subtree_format(tree, tvb, offset, 8,
ett_atm_lane_lc_lan_dest, NULL, "%s LAN destination", type);
tag = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(dest_tree, hf_atm_lan_destination_tag, tvb, offset, 2, ENC_BIG_ENDIAN );
offset += 2;
switch (tag) {
case TAG_MAC_ADDRESS:
proto_tree_add_item(dest_tree, hf_atm_lan_destination_mac, tvb, offset, 6, ENC_NA);
break;
case TAG_ROUTE_DESCRIPTOR:
offset += 4;
td = proto_tree_add_item(dest_tree, hf_atm_lan_destination_route_desc, tvb, offset, 2, ENC_LITTLE_ENDIAN);
rd_tree = proto_item_add_subtree(td, ett_atm_lane_lc_lan_dest_rd);
proto_tree_add_item(rd_tree, hf_atm_lan_destination_lan_id, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(rd_tree, hf_atm_lan_destination_bridge_num, tvb, offset, 2, ENC_LITTLE_ENDIAN);
break;
}
}
/*
* TLV values in LE Control frames.
*/
#define TLV_TYPE(oui, ident) (((oui) << 8) | (ident))
#define LE_CONTROL_TIMEOUT TLV_TYPE(OUI_ATM_FORUM, 0x01)
#define LE_MAX_UNK_FRAME_COUNT TLV_TYPE(OUI_ATM_FORUM, 0x02)
#define LE_MAX_UNK_FRAME_TIME TLV_TYPE(OUI_ATM_FORUM, 0x03)
#define LE_VCC_TIMEOUT_PERIOD TLV_TYPE(OUI_ATM_FORUM, 0x04)
#define LE_MAX_RETRY_COUNT TLV_TYPE(OUI_ATM_FORUM, 0x05)
#define LE_AGING_TIME TLV_TYPE(OUI_ATM_FORUM, 0x06)
#define LE_FORWARD_DELAY_TIME TLV_TYPE(OUI_ATM_FORUM, 0x07)
#define LE_EXPECTED_ARP_RESPONSE_TIME TLV_TYPE(OUI_ATM_FORUM, 0x08)
#define LE_FLUSH_TIMEOUT TLV_TYPE(OUI_ATM_FORUM, 0x09)
#define LE_PATH_SWITCHING_DELAY TLV_TYPE(OUI_ATM_FORUM, 0x0A)
#define LE_LOCAL_SEGMENT_ID TLV_TYPE(OUI_ATM_FORUM, 0x0B)
#define LE_MCAST_SEND_VCC_TYPE TLV_TYPE(OUI_ATM_FORUM, 0x0C)
#define LE_MCAST_SEND_VCC_AVGRATE TLV_TYPE(OUI_ATM_FORUM, 0x0D)
#define LE_MCAST_SEND_VCC_PEAKRATE TLV_TYPE(OUI_ATM_FORUM, 0x0E)
#define LE_CONN_COMPLETION_TIMER TLV_TYPE(OUI_ATM_FORUM, 0x0F)
#define LE_CONFIG_FRAG_INFO TLV_TYPE(OUI_ATM_FORUM, 0x10)
#define LE_LAYER_3_ADDRESS TLV_TYPE(OUI_ATM_FORUM, 0x11)
#define LE_ELAN_ID TLV_TYPE(OUI_ATM_FORUM, 0x12)
#define LE_SERVICE_CATEGORY TLV_TYPE(OUI_ATM_FORUM, 0x13)
#define LE_LLC_MUXED_ATM_ADDRESS TLV_TYPE(OUI_ATM_FORUM, 0x2B)
#define LE_X5_ADJUSTMENT TLV_TYPE(OUI_ATM_FORUM, 0x2C)
#define LE_PREFERRED_LES TLV_TYPE(OUI_ATM_FORUM, 0x2D)
static const value_string le_tlv_type_vals[] = {
{ LE_CONTROL_TIMEOUT, "Control Time-out" },
{ LE_MAX_UNK_FRAME_COUNT, "Maximum Unknown Frame Count" },
{ LE_MAX_UNK_FRAME_TIME, "Maximum Unknown Frame Time" },
{ LE_VCC_TIMEOUT_PERIOD, "VCC Time-out" },
{ LE_MAX_RETRY_COUNT, "Maximum Retry Count" },
{ LE_AGING_TIME, "Aging Time" },
{ LE_FORWARD_DELAY_TIME, "Forwarding Delay Time" },
{ LE_EXPECTED_ARP_RESPONSE_TIME, "Expected LE_ARP Response Time" },
{ LE_FLUSH_TIMEOUT, "Flush Time-out" },
{ LE_PATH_SWITCHING_DELAY, "Path Switching Delay" },
{ LE_LOCAL_SEGMENT_ID, "Local Segment ID" },
{ LE_MCAST_SEND_VCC_TYPE, "Mcast Send VCC Type" },
{ LE_MCAST_SEND_VCC_AVGRATE, "Mcast Send VCC AvgRate" },
{ LE_MCAST_SEND_VCC_PEAKRATE, "Mcast Send VCC PeakRate" },
{ LE_CONN_COMPLETION_TIMER, "Connection Completion Timer" },
{ LE_CONFIG_FRAG_INFO, "Config Frag Info" },
{ LE_LAYER_3_ADDRESS, "Layer 3 Address" },
{ LE_ELAN_ID, "ELAN ID" },
{ LE_SERVICE_CATEGORY, "Service Category" },
{ LE_LLC_MUXED_ATM_ADDRESS, "LLC-muxed ATM Address" },
{ LE_X5_ADJUSTMENT, "X5 Adjustment" },
{ LE_PREFERRED_LES, "Preferred LES" },
{ 0, NULL },
};
static void
dissect_le_control_tlvs(tvbuff_t *tvb, int offset, guint num_tlvs,
proto_tree *tree)
{
guint32 tlv_type;
guint8 tlv_length;
proto_tree *tlv_tree;
while (num_tlvs != 0) {
tlv_type = tvb_get_ntohl(tvb, offset);
tlv_length = tvb_get_guint8(tvb, offset+4);
tlv_tree = proto_tree_add_subtree_format(tree, tvb, offset, 5+tlv_length, ett_atm_lane_lc_tlv, NULL,
"TLV type: %s", val_to_str(tlv_type, le_tlv_type_vals, "Unknown (0x%08x)"));
proto_tree_add_item(tlv_tree, hf_atm_le_control_tlv_type, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(tlv_tree, hf_atm_le_control_tlv_length, tvb, offset+4, 1, ENC_BIG_ENDIAN);
offset += 5+tlv_length;
num_tlvs--;
}
}
static void
dissect_le_configure_join_frame(tvbuff_t *tvb, int offset, proto_tree *tree)
{
guint8 num_tlvs;
guint8 name_size;
dissect_lan_destination(tvb, offset, "Source", tree);
offset += 8;
dissect_lan_destination(tvb, offset, "Target", tree);
offset += 8;
proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_le_configure_join_frame_lan_type, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_le_configure_join_frame_max_frame_size, tvb, offset, 1, ENC_NA);
offset += 1;
num_tlvs = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_atm_le_configure_join_frame_num_tlvs, tvb, offset, 1, ENC_NA);
offset += 1;
name_size = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_atm_le_configure_join_frame_elan_name_size, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA);
offset += 20;
if (name_size > 32)
name_size = 32;
if (name_size != 0) {
proto_tree_add_item(tree, hf_atm_le_configure_join_frame_elan_name, tvb, offset, name_size, ENC_NA);
}
offset += 32;
dissect_le_control_tlvs(tvb, offset, num_tlvs, tree);
}
static void
dissect_le_registration_frame(tvbuff_t *tvb, int offset, proto_tree *tree)
{
guint8 num_tlvs;
dissect_lan_destination(tvb, offset, "Source", tree);
offset += 8;
dissect_lan_destination(tvb, offset, "Target", tree);
offset += 8;
proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 2, ENC_NA);
offset += 2;
num_tlvs = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_atm_le_registration_frame_num_tlvs, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 53, ENC_NA);
offset += 53;
dissect_le_control_tlvs(tvb, offset, num_tlvs, tree);
}
static void
dissect_le_arp_frame(tvbuff_t *tvb, int offset, proto_tree *tree)
{
guint8 num_tlvs;
dissect_lan_destination(tvb, offset, "Source", tree);
offset += 8;
dissect_lan_destination(tvb, offset, "Target", tree);
offset += 8;
proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 2, ENC_NA);
offset += 2;
num_tlvs = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_atm_le_arp_frame_num_tlvs, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 32, ENC_NA);
offset += 32;
dissect_le_control_tlvs(tvb, offset, num_tlvs, tree);
}
static void
dissect_le_verify_frame(tvbuff_t *tvb, int offset, proto_tree *tree)
{
guint8 num_tlvs;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 38, ENC_NA);
offset += 38;
num_tlvs = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_atm_le_verify_frame_num_tlvs, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 32, ENC_NA);
offset += 32;
dissect_le_control_tlvs(tvb, offset, num_tlvs, tree);
}
static int
dissect_le_flush_frame(tvbuff_t *tvb, int offset, proto_tree *tree)
{
dissect_lan_destination(tvb, offset, "Source", tree);
offset += 8;
dissect_lan_destination(tvb, offset, "Target", tree);
offset += 8;
proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA);
offset += 20;
proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 32, ENC_NA);
offset += 32;
return offset;
}
static void
dissect_le_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *lane_tree = NULL;
int offset = 0;
proto_item *tf;
proto_tree *flags_tree;
guint16 opcode;
col_set_str(pinfo->cinfo, COL_INFO, "LE Control");
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_atm_lane, tvb, offset, 108, "ATM LANE");
lane_tree = proto_item_add_subtree(ti, ett_atm_lane);
proto_tree_add_item(lane_tree, hf_atm_le_control_marker, tvb, offset, 2, ENC_BIG_ENDIAN );
}
offset += 2;
if (tree) {
proto_tree_add_item(lane_tree, hf_atm_le_control_protocol, tvb, offset, 1, ENC_BIG_ENDIAN );
}
offset += 1;
if (tree) {
proto_tree_add_item(lane_tree, hf_atm_le_control_version, tvb, offset, 1, ENC_BIG_ENDIAN );
}
offset += 1;
opcode = tvb_get_ntohs(tvb, offset);
col_append_fstr(pinfo->cinfo, COL_INFO, ": %s",
val_to_str(opcode, le_control_opcode_vals,
"Unknown opcode (0x%04X)"));
if (tree) {
proto_tree_add_item(lane_tree, hf_atm_le_control_opcode, tvb, offset, 2, ENC_BIG_ENDIAN );
}
offset += 2;
if (opcode == READY_QUERY || opcode == READY_IND) {
/* There's nothing more in this packet. */
return;
}
if (tree) {
if (opcode & 0x0100) {
/* Response; decode status. */
proto_tree_add_item(lane_tree, hf_atm_le_control_status, tvb, offset, 2, ENC_BIG_ENDIAN );
}
offset += 2;
proto_tree_add_item(lane_tree, hf_atm_le_control_transaction_id, tvb, offset, 4, ENC_BIG_ENDIAN );
offset += 4;
proto_tree_add_item(lane_tree, hf_atm_le_control_requester_lecid, tvb, offset, 2, ENC_BIG_ENDIAN );
offset += 2;
tf = proto_tree_add_item(lane_tree, hf_atm_le_control_flags, tvb, offset, 2, ENC_BIG_ENDIAN );
flags_tree = proto_item_add_subtree(tf, ett_atm_lane_lc_flags);
switch (opcode) {
case LE_CONFIGURE_REQUEST:
case LE_CONFIGURE_RESPONSE:
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_v2_capable, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
dissect_le_configure_join_frame(tvb, offset, lane_tree);
break;
case LE_JOIN_REQUEST:
case LE_JOIN_RESPONSE:
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_v2_capable, tvb, offset, 2, ENC_BIG_ENDIAN);
if (opcode == LE_JOIN_REQUEST) {
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_selective_multicast, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_v2_required, tvb, offset, 2, ENC_BIG_ENDIAN);
}
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_proxy, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_exclude_explorer_frames, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
dissect_le_configure_join_frame(tvb, offset, lane_tree);
break;
case LE_REGISTER_REQUEST:
case LE_REGISTER_RESPONSE:
case LE_UNREGISTER_REQUEST:
case LE_UNREGISTER_RESPONSE:
offset += 2;
dissect_le_registration_frame(tvb, offset, lane_tree);
break;
case LE_ARP_REQUEST:
case LE_ARP_RESPONSE:
case LE_NARP_REQUEST:
if (opcode != LE_NARP_REQUEST) {
proto_tree_add_item(flags_tree, hf_atm_le_control_flag_address, tvb, offset, 2, ENC_BIG_ENDIAN);
}
offset += 2;
dissect_le_arp_frame(tvb, offset, lane_tree);
break;
case LE_TOPOLOGY_REQUEST:
proto_tree_add_item(flags_tree, hf_atm_le_control_topology_change, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(flags_tree, hf_atm_reserved, tvb, offset, 92, ENC_NA);
break;
case LE_VERIFY_REQUEST:
case LE_VERIFY_RESPONSE:
offset += 2;
dissect_le_verify_frame(tvb, offset, lane_tree);
break;
case LE_FLUSH_REQUEST:
case LE_FLUSH_RESPONSE:
offset += 2;
dissect_le_flush_frame(tvb, offset, lane_tree);
break;
}
}
}
static gboolean
capture_lane(const guchar *pd, int offset _U_,
int len, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header)
{
/* Is it LE Control, 802.3, 802.5, or "none of the above"? */
return try_capture_dissector("atm_lane", pseudo_header->atm.subtype, pd, 2, len, cpinfo, pseudo_header);
}
static int
dissect_lane(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct atm_phdr *atm_info = (struct atm_phdr *)data;
tvbuff_t *next_tvb;
tvbuff_t *next_tvb_le_client;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM LANE");
/* Is it LE Control, 802.3, 802.5, or "none of the above"? */
switch (atm_info->subtype) {
case TRAF_ST_LANE_LE_CTRL:
dissect_le_control(tvb, pinfo, tree);
break;
case TRAF_ST_LANE_802_3:
case TRAF_ST_LANE_802_3_MC:
col_set_str(pinfo->cinfo, COL_INFO, "LE Client - Ethernet/802.3");
dissect_le_client(tvb, tree);
/* Dissect as Ethernet */
next_tvb_le_client = tvb_new_subset_remaining(tvb, 2);
call_dissector(eth_withoutfcs_handle, next_tvb_le_client, pinfo, tree);
break;
case TRAF_ST_LANE_802_5:
case TRAF_ST_LANE_802_5_MC:
col_set_str(pinfo->cinfo, COL_INFO, "LE Client - 802.5");
dissect_le_client(tvb, tree);
/* Dissect as Token-Ring */
next_tvb_le_client = tvb_new_subset_remaining(tvb, 2);
call_dissector(tr_handle, next_tvb_le_client, pinfo, tree);
break;
default:
/* Dump it as raw data. */
col_set_str(pinfo->cinfo, COL_INFO, "Unknown LANE traffic type");
next_tvb = tvb_new_subset_remaining(tvb, 0);
call_data_dissector(next_tvb, pinfo, tree);
break;
}
return tvb_captured_length(tvb);
}
static int
dissect_ilmi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
return dissect_snmp_pdu(tvb, 0, pinfo, tree, proto_ilmi, ett_ilmi, FALSE);
}
/* AAL types */
static const value_string aal_vals[] = {
{ AAL_UNKNOWN, "Unknown AAL" },
{ AAL_1, "AAL1" },
{ AAL_2, "AAL2" },
{ AAL_3_4, "AAL3/4" },
{ AAL_5, "AAL5" },
{ AAL_USER, "User AAL" },
{ AAL_SIGNALLING, "Signalling AAL" },
{ AAL_OAMCELL, "OAM cell" },
{ 0, NULL }
};
/* AAL5 higher-level traffic types */
static const value_string aal5_hltype_vals[] = {
{ TRAF_UNKNOWN, "Unknown traffic type" },
{ TRAF_LLCMX, "LLC multiplexed" },
{ TRAF_VCMX, "VC multiplexed" },
{ TRAF_LANE, "LANE" },
{ TRAF_ILMI, "ILMI" },
{ TRAF_FR, "Frame Relay" },
{ TRAF_SPANS, "FORE SPANS" },
{ TRAF_IPSILON, "Ipsilon" },
{ TRAF_GPRS_NS, "GPRS NS" },
{ TRAF_SSCOP, "SSCOP" },
{ 0, NULL }
};
/* Traffic subtypes for VC multiplexed traffic */
static const value_string vcmx_type_vals[] = {
{ TRAF_ST_UNKNOWN, "Unknown VC multiplexed traffic type" },
{ TRAF_ST_VCMX_802_3_FCS, "802.3 FCS" },
{ TRAF_ST_VCMX_802_4_FCS, "802.4 FCS" },
{ TRAF_ST_VCMX_802_5_FCS, "802.5 FCS" },
{ TRAF_ST_VCMX_FDDI_FCS, "FDDI FCS" },
{ TRAF_ST_VCMX_802_6_FCS, "802.6 FCS" },
{ TRAF_ST_VCMX_802_3, "802.3" },
{ TRAF_ST_VCMX_802_4, "802.4" },
{ TRAF_ST_VCMX_802_5, "802.5" },
{ TRAF_ST_VCMX_FDDI, "FDDI" },
{ TRAF_ST_VCMX_802_6, "802.6" },
{ TRAF_ST_VCMX_FRAGMENTS, "Fragments" },
{ TRAF_ST_VCMX_BPDU, "BPDU" },
{ 0, NULL }
};
/* Traffic subtypes for LANE traffic */
static const value_string lane_type_vals[] = {
{ TRAF_ST_UNKNOWN, "Unknown LANE traffic type" },
{ TRAF_ST_LANE_LE_CTRL, "LE Control" },
{ TRAF_ST_LANE_802_3, "802.3" },
{ TRAF_ST_LANE_802_5, "802.5" },
{ TRAF_ST_LANE_802_3_MC, "802.3 multicast" },
{ TRAF_ST_LANE_802_5_MC, "802.5 multicast" },
{ 0, NULL }
};
/* Traffic subtypes for Ipsilon traffic */
static const value_string ipsilon_type_vals[] = {
{ TRAF_ST_UNKNOWN, "Unknown Ipsilon traffic type" },
{ TRAF_ST_IPSILON_FT0, "Flow type 0" },
{ TRAF_ST_IPSILON_FT1, "Flow type 1" },
{ TRAF_ST_IPSILON_FT2, "Flow type 2" },
{ 0, NULL }
};
static gboolean
capture_atm(const guchar *pd, int offset,
int len, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header)
{
if (pseudo_header->atm.aal == AAL_5) {
return try_capture_dissector("atm.aal5.type", pseudo_header->atm.type, pd, offset, len, cpinfo, pseudo_header);
}
return FALSE;
}
static void
dissect_reassembled_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_item *atm_ti, proto_tree *atm_tree, gboolean truncated,
struct atm_phdr *atm_info, gboolean pseudowire_mode)
{
guint length, reported_length;
guint16 aal5_length;
int pad_length;
tvbuff_t *next_tvb;
guint32 crc;
guint32 calc_crc;
gboolean decoded;
/*
* This is reassembled traffic, so the cell headers are missing;
* show the traffic type for AAL5 traffic, and the VPI and VCI,
* from the pseudo-header.
*/
if (atm_info->aal == AAL_5) {
proto_tree_add_uint(atm_tree, hf_atm_traffic_type, tvb, 0, 0, atm_info->type);
switch (atm_info->type) {
case TRAF_VCMX:
proto_tree_add_uint(atm_tree, hf_atm_traffic_vcmx, tvb, 0, 0, atm_info->subtype);
break;
case TRAF_LANE:
proto_tree_add_uint(atm_tree, hf_atm_traffic_lane, tvb, 0, 0, atm_info->subtype);
break;
case TRAF_IPSILON:
proto_tree_add_uint(atm_tree, hf_atm_traffic_ipsilon, tvb, 0, 0, atm_info->subtype);
break;
}
}
if (!pseudowire_mode) {
proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 0, atm_info->vpi);
proto_tree_add_uint(atm_tree, hf_atm_vci, tvb, 0, 0, atm_info->vci);
/* Also show vpi/vci in info column */
col_append_fstr(pinfo->cinfo, COL_INFO, " VPI=%u, VCI=%u",
atm_info->vpi, atm_info->vci);
}
next_tvb = tvb;
if (truncated || atm_info->flags & ATM_REASSEMBLY_ERROR) {
/*
* The packet data does not include stuff such as the AAL5
* trailer, either because it was explicitly left out or because
* reassembly failed.
*/
if (atm_info->cells != 0) {
/*
* If the cell count is 0, assume it means we don't know how
* many cells it was.
*
* XXX - also assume it means we don't know what was in the AAL5
* trailer. We may, however, find some capture program that can
* give us the AAL5 trailer information but not the cell count,
* in which case we need some other way of indicating whether we
* have the AAL5 trailer information.
*/
if (tree) {
proto_tree_add_uint(atm_tree, hf_atm_cells, tvb, 0, 0, atm_info->cells);
proto_tree_add_uint(atm_tree, hf_atm_aal5_uu, tvb, 0, 0, atm_info->aal5t_u2u >> 8);
proto_tree_add_uint(atm_tree, hf_atm_aal5_cpi, tvb, 0, 0, atm_info->aal5t_u2u & 0xFF);
proto_tree_add_uint(atm_tree, hf_atm_aal5_len, tvb, 0, 0, atm_info->aal5t_len);
proto_tree_add_uint(atm_tree, hf_atm_aal5_crc, tvb, 0, 0, atm_info->aal5t_chksum);
}
}
} else {
/*
* The packet data includes stuff such as the AAL5 trailer, if
* it wasn't cut off by the snapshot length, and ATM reassembly
* succeeded.
* Decode the trailer, if present, and then chop it off.
*/
length = tvb_captured_length(tvb);
reported_length = tvb_reported_length(tvb);
if ((reported_length % 48) == 0) {
/*
* Reported length is a multiple of 48, so we can presumably
* divide it by 48 to get the number of cells.
*/
proto_tree_add_uint(atm_tree, hf_atm_cells, tvb, 0, 0, reported_length/48);
}
if ((atm_info->aal == AAL_5 || atm_info->aal == AAL_SIGNALLING) &&
length >= reported_length) {
/*
* XXX - what if the packet is truncated? Can that happen?
* What if you capture with Windows Sniffer on an ATM link
* and tell it not to save the entire packet? What happens
* to the trailer?
*/
aal5_length = tvb_get_ntohs(tvb, length - 6);
/*
* Check for sanity in the AAL5 length. It must be > 0
* and must be less than the amount of space left after
* we remove the trailer.
*
* If it's not sane, assume we don't have a trailer.
*/
if (aal5_length > 0 && aal5_length <= length - 8) {
/*
* How much padding is there?
*/
pad_length = length - aal5_length - 8;
/*
* There is no reason for more than 47 bytes of padding.
* The most padding you can have would be 7 bytes at the
* end of the next-to-last cell (8 bytes after the end of
* the data means you can fit the trailer in that cell),
* plus 40 bytes in the last cell (with the last 8 bytes
* being padding).
*
* If there's more than 47 bytes of padding, assume we don't
* have a trailer.
*/
if (pad_length <= 47) {
if (tree) {
proto_item *ti;
if (pad_length > 0) {
proto_tree_add_item(atm_tree, hf_atm_padding, tvb, aal5_length, pad_length, ENC_NA);
}
proto_tree_add_item(atm_tree, hf_atm_aal5_uu, tvb, length - 8, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(atm_tree, hf_atm_aal5_cpi, tvb, length - 7, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(atm_tree, hf_atm_aal5_len, tvb, length - 6, 2, ENC_BIG_ENDIAN);
crc = tvb_get_ntohl(tvb, length - 4);
calc_crc = crc32_mpeg2_tvb(tvb, length);
ti = proto_tree_add_uint(atm_tree, hf_atm_aal5_crc, tvb, length - 4, 4, crc);
proto_item_append_text(ti, (calc_crc == 0xC704DD7B) ? " (correct)" : " (incorrect)");
}
next_tvb = tvb_new_subset_length(tvb, 0, aal5_length);
}
}
}
}
/*
* First check whether custom dissection table
* was set up to dissect this VPI+VCI combination
*/
if (dissector_try_uint_new(atm_reassembled_vpi_vci_table,
((atm_info->vpi) << 16) | atm_info->vci,
next_tvb, pinfo, tree, TRUE, atm_info))
{
return;
}
decoded = FALSE;
/*
* Don't try to dissect the payload of PDUs with a reassembly
* error.
*/
switch (atm_info->aal) {
case AAL_SIGNALLING:
if (!(atm_info->flags & ATM_REASSEMBLY_ERROR)) {
call_dissector(sscop_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
break;
case AAL_5:
if (!(atm_info->flags & ATM_REASSEMBLY_ERROR)) {
if (dissector_try_uint_new(atm_type_aal5_table, atm_info->type, next_tvb, pinfo, tree, TRUE, atm_info))
{
decoded = TRUE;
}
else
{
if (tvb_reported_length(next_tvb) > 7) /* sizeof(octet) */
{
guint8 octet[8];
tvb_memcpy(next_tvb, octet, 0, sizeof(octet));
if (octet[0] == 0xaa
&& octet[1] == 0xaa
&& octet[2] == 0x03) /* LLC SNAP as per RFC2684 */
{
call_dissector(llc_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
else if ((pntoh16(octet) & 0xff) == PPP_IP)
{
call_dissector(ppp_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
else if (pntoh16(octet) == 0x00)
{
/*
* Assume VC multiplexed bridged Ethernet.
* Whether there's an FCS is an option negotiated
* over the VC, so we call the "do heuristic checks
* to see if there's an FCS" version of the Ethernet
* dissector.
*
* See RFC 2684 section 6.2 "VC Multiplexing of Bridged
* Protocols".
*/
proto_tree_add_item(tree, hf_atm_padding, tvb, 0, 2, ENC_NA);
next_tvb = tvb_new_subset_remaining(tvb, 2);
call_dissector(eth_maybefcs_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
else if (octet[2] == 0x03 && /* NLPID */
((octet[3] == 0xcc || /* IPv4 */
octet[3] == 0x8e) || /* IPv6 */
(octet[3] == 0x00 && /* Eth */
octet[4] == 0x80))) /* Eth */
{
/* assume network interworking with FR 2 byte header */
call_dissector(fr_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
else if (octet[4] == 0x03 && /* NLPID */
((octet[5] == 0xcc || /* IPv4 */
octet[5] == 0x8e) || /* IPv6 */
(octet[5] == 0x00 && /* Eth */
octet[6] == 0x80))) /* Eth */
{
/* assume network interworking with FR 4 byte header */
call_dissector(fr_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
else if (((octet[0] & 0xf0)== 0x40) ||
((octet[0] & 0xf0) == 0x60))
{
call_dissector(ip_handle, next_tvb, pinfo, tree);
decoded = TRUE;
}
}
}
break;
}
break;
case AAL_2:
proto_tree_add_uint(atm_tree, hf_atm_cid, tvb, 0, 0,
atm_info->aal2_cid);
proto_item_append_text(atm_ti, " (vpi=%u vci=%u cid=%u)",
atm_info->vpi,
atm_info->vci,
atm_info->aal2_cid);
if (!(atm_info->flags & ATM_REASSEMBLY_ERROR)) {
if (atm_info->flags & ATM_AAL2_NOPHDR) {
next_tvb = tvb;
} else {
/* Skip first 4 bytes of message
- side
- length
- UUI
Ignoring for now... */
next_tvb = tvb_new_subset_remaining(tvb, 4);
}
if (dissector_try_uint(atm_type_aal2_table, atm_info->type, next_tvb, pinfo, tree))
{
decoded = TRUE;
}
}
break;
default:
/* Dump it as raw data. */
break;
}
if (!decoded) {
/* Dump it as raw data. */
call_data_dissector(next_tvb, pinfo, tree);
}
}
/*
* Charles Michael Heard's HEC code, from
*
* http://www.cell-relay.com/cell-relay/publications/software/CRC/32bitCRC.tutorial.html
*
* with the syndrome and error position tables initialized with values
* computed by his "gen_syndrome_table()" and "gen_err_posn_table()" routines,
* rather than by calling those routines at run time, and with various data
* type cleanups and changes not to correct the header if a correctible
* error was detected.
*/
#define COSET_LEADER 0x055 /* x^6 + x^4 + x^2 + 1 */
static const guint8 syndrome_table[256] = {
0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15,
0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d,
0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65,
0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d,
0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5,
0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd,
0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85,
0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd,
0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2,
0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea,
0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2,
0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a,
0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32,
0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a,
0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42,
0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c,
0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4,
0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec,
0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4,
0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c,
0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44,
0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c,
0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34,
0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b,
0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63,
0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b,
0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13,
0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb,
0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83,
0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb,
0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3,
};
#define NO_ERROR_DETECTED -128
#define UNCORRECTIBLE_ERROR 128
static const int err_posn_table[256] = {
NO_ERROR_DETECTED, 39,
38, UNCORRECTIBLE_ERROR,
37, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 31,
36, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 8,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
30, UNCORRECTIBLE_ERROR,
35, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 23,
7, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
29, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
34, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
22, UNCORRECTIBLE_ERROR,
6, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 0,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
28, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
33, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 10,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 12,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
21, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 19,
5, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 17,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 3,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 15,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
27, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
32, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
9, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 24,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 1,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
11, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
20, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 13,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
18, UNCORRECTIBLE_ERROR,
4, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
16, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, 25,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
2, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
14, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
26, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR,
};
/*
* Return an indication of whether there was an error in the cell header
* and, if so, where the error was, if it was correctable.
*/
static int
get_header_err(const guint8 *cell_header)
{
register guint8 syndrome;
register int i, err_posn;
syndrome = 0;
for (i = 0; i < 4; i++)
syndrome = syndrome_table[syndrome ^ cell_header[i]];
syndrome ^= cell_header[4] ^ COSET_LEADER;
err_posn = err_posn_table [syndrome];
if (err_posn < 0)
return NO_ERROR_DETECTED;
else if (err_posn < 40)
return err_posn;
else
return UNCORRECTIBLE_ERROR;
}
const value_string atm_pt_vals[] = {
{ 0, "User data cell, congestion not experienced, SDU-type = 0" },
{ 1, "User data cell, congestion not experienced, SDU-type = 1" },
{ 2, "User data cell, congestion experienced, SDU-type = 0" },
{ 3, "User data cell, congestion experienced, SDU-type = 1" },
{ 4, "Segment OAM F5 flow related cell" },
{ 5, "End-to-end OAM F5 flow related cell" },
{ 6, "VC resource management cell" },
{ 0, NULL }
};
static const value_string st_vals[] = {
{ 2, "BOM" },
{ 0, "COM" },
{ 1, "EOM" },
{ 3, "SSM" },
{ 0, NULL }
};
#define OAM_TYPE_FM 1 /* Fault Management */
#define OAM_TYPE_PM 2 /* Performance Management */
#define OAM_TYPE_AD 8 /* Activation/Deactivation */
static const value_string oam_type_vals[] = {
{ OAM_TYPE_FM, "Fault Management" },
{ OAM_TYPE_PM, "Performance Management" },
{ OAM_TYPE_AD, "Activation/Deactivation" },
{ 0, NULL }
};
static const value_string ft_fm_vals[] = {
{ 0, "Alarm Indication Signal" },
{ 1, "Far End Receive Failure" },
{ 8, "OAM Cell Loopback" },
{ 4, "Continuity Check" },
{ 0, NULL }
};
static const value_string ft_pm_vals[] = {
{ 0, "Forward Monitoring" },
{ 1, "Backward Reporting" },
{ 2, "Monitoring and Reporting" },
{ 0, NULL }
};
static const value_string ft_ad_vals[] = {
{ 0, "Performance Monitoring" },
{ 1, "Continuity Check" },
{ 0, NULL }
};
static void
dissect_atm_cell_payload(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, guint aal, gboolean fill_columns,
struct atm_phdr *atm_info)
{
proto_tree *aal_tree;
proto_item *ti;
guint8 octet;
gint length;
guint16 aal3_4_hdr, crc10;
tvbuff_t *next_tvb;
next_tvb = tvb_new_subset_remaining(tvb, offset);
/*
* First check whether custom dissection table
* was set up to dissect this VPI+VCI combination
*/
if (dissector_try_uint_new(atm_cell_payload_vpi_vci_table,
((atm_info->vpi) << 16) | atm_info->vci,
next_tvb, pinfo, tree, TRUE, atm_info))
{
return;
}
switch (aal) {
case AAL_1:
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AAL1");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_aal1, tvb, offset, -1, ENC_NA);
aal_tree = proto_item_add_subtree(ti, ett_aal1);
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(aal_tree, hf_atm_aa1_csi, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(aal_tree, hf_atm_aa1_seq_count, tvb, offset, 1, ENC_BIG_ENDIAN);
col_add_fstr(pinfo->cinfo, COL_INFO, "Sequence count = %u",
(octet >> 4) & 0x7);
proto_tree_add_item(aal_tree, hf_atm_aa1_crc, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(aal_tree, hf_atm_aa1_parity, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(aal_tree, hf_atm_aa1_payload, tvb, offset, 47, ENC_NA);
break;
case AAL_3_4:
/*
* XXX - or should this be the CS PDU?
*/
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AAL3/4");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_aal3_4, tvb, offset, -1, ENC_NA);
aal_tree = proto_item_add_subtree(ti, ett_aal3_4);
aal3_4_hdr = tvb_get_ntohs(tvb, offset);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s, sequence number = %u",
val_to_str(aal3_4_hdr >> 14, st_vals, "Unknown (%u)"),
(aal3_4_hdr >> 10) & 0xF);
proto_tree_add_item(aal_tree, hf_atm_aal3_4_seg_type, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(aal_tree, hf_atm_aal3_4_seq_num, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(aal_tree, hf_atm_aal3_4_multiplex_id, tvb, offset, 2, ENC_BIG_ENDIAN);
length = tvb_reported_length_remaining(tvb, offset);
crc10 = update_crc10_by_bytes_tvb(0, tvb, offset, length);
offset += 2;
proto_tree_add_item(aal_tree, hf_atm_aal3_4_information, tvb, offset, 44, ENC_NA);
offset += 44;
proto_tree_add_item(aal_tree, hf_atm_aal3_4_length_indicator, tvb, offset, 2, ENC_BIG_ENDIAN);
ti = proto_tree_add_item(aal_tree, hf_atm_aal3_4_crc, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " (%s)", (crc10 == 0) ? " (correct)" : " (incorrect)");
break;
case AAL_OAMCELL:
if (fill_columns)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "OAM AAL");
col_clear(pinfo->cinfo, COL_INFO);
}
ti = proto_tree_add_item(tree, proto_oamaal, tvb, offset, -1, ENC_NA);
aal_tree = proto_item_add_subtree(ti, ett_oamaal);
octet = tvb_get_guint8(tvb, offset);
if (fill_columns)
{
col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
val_to_str(octet >> 4, oam_type_vals, "Unknown (%u)"));
}
proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type, tvb, offset, 1, ENC_BIG_ENDIAN);
switch (octet >> 4) {
case OAM_TYPE_FM:
proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_fm, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
case OAM_TYPE_PM:
proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_pm, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
case OAM_TYPE_AD:
proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_ad, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
default:
proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_ft, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
}
length = tvb_reported_length_remaining(tvb, offset);
crc10 = update_crc10_by_bytes_tvb(0, tvb, offset, length);
offset += 1;
proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_func_spec, tvb, offset, 45, ENC_NA);
offset += 45;
ti = proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_crc, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " (%s)", (crc10 == 0) ? " (correct)" : " (incorrect)");
break;
default:
next_tvb = tvb_new_subset_remaining(tvb, offset);
call_data_dissector(next_tvb, pinfo, tree);
break;
}
}
/*
* Check for OAM cells.
* OAM F4 is VCI 3 or 4 and PT 0X0.
* OAM F5 is PT 10X.
*/
gboolean
atm_is_oam_cell(const guint16 vci, const guint8 pt)
{
return (((vci == 3 || vci == 4) && ((pt & 0x5) == 0))
|| ((pt & 0x6) == 0x4));
}
static void
dissect_atm_cell(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *atm_tree, guint aal, gboolean nni,
gboolean crc_stripped, const struct atm_phdr *atm_info)
{
int offset;
proto_item *ti;
guint8 octet, pt;
int err;
guint16 vpi, vci;
struct atm_phdr atm_info_local;
if (!nni) {
/*
* FF: ITU-T I.361 (Section 2.2) defines the cell header format
* and encoding at UNI reference point as:
*
* 8 7 6 5 4 3 2 1
* +-+-+-+-+-+-+-+-+
* | GFC | VPI |
* +-+-+-+-+-+-+-+-+
* | VPI | VCI |
* +-+-+-+-+-+-+-+-+
* | VCI |
* +-+-+-+-+-+-+-+-+
* | VCI | PT |C|
* +-+-+-+-+-+-+-+-+
* | HEC (CRC) |
* +-+-+-+-+-+-+-+-+
*/
octet = tvb_get_guint8(tvb, 0);
proto_tree_add_item(atm_tree, hf_atm_gfc, tvb, 0, 1, ENC_NA);
vpi = (octet & 0xF) << 4;
octet = tvb_get_guint8(tvb, 1);
vpi |= octet >> 4;
proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 2, vpi);
} else {
/*
* FF: ITU-T I.361 (Section 2.3) defines the cell header format
* and encoding at NNI reference point as:
*
* 8 7 6 5 4 3 2 1
* +-+-+-+-+-+-+-+-+
* | VPI |
* +-+-+-+-+-+-+-+-+
* | VPI | VCI |
* +-+-+-+-+-+-+-+-+
* | VCI |
* +-+-+-+-+-+-+-+-+
* | VCI | PT |C|
* +-+-+-+-+-+-+-+-+
* | HEC (CRC) |
* +-+-+-+-+-+-+-+-+
*/
octet = tvb_get_guint8(tvb, 0);
vpi = octet << 4;
octet = tvb_get_guint8(tvb, 1);
vpi |= (octet & 0xF0) >> 4;
proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 2, vpi);
}
vci = (octet & 0x0F) << 12;
octet = tvb_get_guint8(tvb, 2);
vci |= octet << 4;
octet = tvb_get_guint8(tvb, 3);
vci |= octet >> 4;
proto_tree_add_uint(atm_tree, hf_atm_vci, tvb, 1, 3, vci);
pt = (octet >> 1) & 0x7;
proto_tree_add_item(atm_tree, hf_atm_payload_type, tvb, 3, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(atm_tree, hf_atm_cell_loss_priority, tvb, 3, 1, ENC_BIG_ENDIAN);
if (!crc_stripped) {
/*
* FF: parse the Header Error Check (HEC).
*/
ti = proto_tree_add_item(atm_tree, hf_atm_header_error_check, tvb, 4, 1, ENC_BIG_ENDIAN);
err = get_header_err((const guint8*)tvb_memdup(pinfo->pool, tvb, 0, 5));
if (err == NO_ERROR_DETECTED)
proto_item_append_text(ti, " (correct)");
else if (err == UNCORRECTIBLE_ERROR)
proto_item_append_text(ti, " (uncorrectable error)");
else
proto_item_append_text(ti, " (error in bit %d)", err);
offset = 5;
} else {
/*
* FF: in some encapsulation modes (e.g. RFC 4717, ATM N-to-One
* Cell Mode) the Header Error Check (HEC) field is stripped.
* So we do nothing here.
*/
offset = 4;
}
/*
* Check for OAM cells.
* XXX - do this for all AAL values, overriding whatever information
* Wiretap got from the file?
*/
if (aal == AAL_USER || aal == AAL_UNKNOWN) {
if (atm_is_oam_cell(vci,pt)) {
aal = AAL_OAMCELL;
}
}
memset(&atm_info_local, 0, sizeof(atm_info_local));
if (atm_info) {
atm_info_local.flags = atm_info->flags;
atm_info_local.aal = atm_info->aal;
atm_info_local.type = atm_info->type;
atm_info_local.subtype = atm_info->subtype;
atm_info_local.vpi = atm_info->vpi;
atm_info_local.vci = atm_info->vci;
atm_info_local.aal2_cid = atm_info->aal2_cid;
atm_info_local.channel = atm_info->channel;
atm_info_local.cells = atm_info->cells;
atm_info_local.aal5t_u2u = atm_info->aal5t_u2u;
atm_info_local.aal5t_len = atm_info->aal5t_len;
atm_info_local.aal5t_chksum = atm_info->aal5t_chksum;
} else {
atm_info_local.aal = aal;
atm_info_local.type = pt;
atm_info_local.vpi = vpi;
atm_info_local.vci = vci;
}
dissect_atm_cell_payload(tvb, offset, pinfo, tree, aal, TRUE, &atm_info_local);
}
static int
dissect_atm_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
gboolean truncated, struct atm_phdr *atm_info, gboolean pseudowire_mode)
{
proto_tree *atm_tree = NULL;
proto_item *atm_ti = NULL;
if ( atm_info->aal == AAL_5 && atm_info->type == TRAF_LANE &&
dissect_lanesscop ) {
atm_info->aal = AAL_SIGNALLING;
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM");
if (!pseudowire_mode) {
switch (atm_info->channel) {
case 0:
/* Traffic from DTE to DCE. */
col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DCE");
col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DTE");
break;
case 1:
/* Traffic from DCE to DTE. */
col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DTE");
col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DCE");
break;
}
}
if (atm_info->aal == AAL_5) {
col_add_fstr(pinfo->cinfo, COL_INFO, "AAL5 %s",
val_to_str(atm_info->type, aal5_hltype_vals,
"Unknown traffic type (%u)"));
} else {
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(atm_info->aal, aal_vals,
"Unknown AAL (%u)"));
}
if (tree) {
atm_ti = proto_tree_add_item(tree, proto_atm, tvb, 0, -1, ENC_NA);
atm_tree = proto_item_add_subtree(atm_ti, ett_atm);
if (!pseudowire_mode) {
proto_tree_add_uint(atm_tree, hf_atm_channel, tvb, 0, 0, atm_info->channel);
if (atm_info->flags & ATM_REASSEMBLY_ERROR)
expert_add_info(pinfo, atm_ti, &ei_atm_reassembly_failed);
}
proto_tree_add_uint_format_value(atm_tree, hf_atm_aal, tvb, 0, 0,
atm_info->aal,
"%s",
val_to_str(atm_info->aal, aal_vals,
"Unknown AAL (%u)"));
}
if (atm_info->flags & ATM_RAW_CELL) {
/* This is a single cell, with the cell header at the beginning. */
if (atm_info->flags & ATM_NO_HEC) {
proto_item_set_len(atm_ti, 4);
} else {
proto_item_set_len(atm_ti, 5);
}
dissect_atm_cell(tvb, pinfo, tree, atm_tree,
atm_info->aal, FALSE,
atm_info->flags & ATM_NO_HEC, atm_info);
} else {
/* This is a reassembled PDU. */
/*
* ATM dissector is used as "sub-dissector" for ATM pseudowires.
* In such cases, the dissector data parameter is used to pass info from/to
* PW dissector to ATM dissector. For decoding normal ATM traffic
* data parameter should be NULL.
*/
dissect_reassembled_pdu(tvb, pinfo, tree, atm_tree, atm_ti, truncated,
atm_info, pseudowire_mode);
}
return tvb_reported_length(tvb);
}
static int
dissect_atm_truncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct atm_phdr *atm_info = (struct atm_phdr *)data;
DISSECTOR_ASSERT(atm_info != NULL);
return dissect_atm_common(tvb, pinfo, tree, TRUE, atm_info, FALSE);
}
static int
dissect_atm_pw_truncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct atm_phdr *atm_info = (struct atm_phdr *)data;
DISSECTOR_ASSERT(atm_info != NULL);
return dissect_atm_common(tvb, pinfo, tree, TRUE, atm_info, TRUE);
}
static int
dissect_atm_untruncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct atm_phdr *atm_info = (struct atm_phdr *)data;
DISSECTOR_ASSERT(atm_info != NULL);
return dissect_atm_common(tvb, pinfo, tree, FALSE, atm_info, FALSE);
}
static int
dissect_atm_pw_untruncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct atm_phdr *atm_info = (struct atm_phdr *)data;
DISSECTOR_ASSERT(atm_info != NULL);
return dissect_atm_common(tvb, pinfo, tree, FALSE, atm_info, TRUE);
}
static int
dissect_atm_oam_cell(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *atm_tree;
proto_item *atm_ti;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM");
atm_ti = proto_tree_add_item(tree, proto_atm, tvb, 0, 0, ENC_NA);
atm_tree = proto_item_add_subtree(atm_ti, ett_atm);
dissect_atm_cell(tvb, pinfo, tree, atm_tree, AAL_OAMCELL, FALSE, FALSE, NULL);
return tvb_reported_length(tvb);
}
static int
dissect_atm_pw_oam_cell(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
struct pw_atm_phdr *pw_atm_info = (struct pw_atm_phdr *)data;
DISSECTOR_ASSERT(pw_atm_info != NULL);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM");
dissect_atm_cell_payload(tvb, 0, pinfo, tree, AAL_OAMCELL,
pw_atm_info->enable_fill_columns_by_atm_dissector,
&pw_atm_info->info);
return tvb_reported_length(tvb);
}
static void atm_prompt(packet_info *pinfo _U_, gchar* result)
{
g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Decode AAL2 traffic as");
}
static gpointer atm_value(packet_info *pinfo)
{
return GUINT_TO_POINTER((guint)pinfo->pseudo_header->atm.type);
}
void
proto_register_atm(void)
{
static hf_register_info hf[] = {
{ &hf_atm_aal,
{ "AAL", "atm.aal", FT_UINT8, BASE_DEC, VALS(aal_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_gfc,
{ "GFC", "atm.GFC", FT_UINT8, BASE_DEC, NULL, 0xF0,
NULL, HFILL }},
{ &hf_atm_vpi,
{ "VPI", "atm.vpi", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_vci,
{ "VCI", "atm.vci", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_cid,
{ "CID", "atm.cid", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_reserved,
{ "Reserved", "atm.reserved", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_client_client,
{ "LE Client", "atm.le_client.client", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_lan_destination_tag,
{ "Tag", "atm.lan_destination.tag", FT_UINT16, BASE_HEX, VALS(le_control_landest_tag_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_lan_destination_mac,
{ "MAC address", "atm.lan_destination.mac", FT_ETHER, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_tlv_type,
{ "TLV Type", "atm.le_control.tlv_type", FT_UINT32, BASE_HEX, VALS(le_tlv_type_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_tlv_length,
{ "TLV Length", "atm.le_control.tlv_length", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_lan_destination_route_desc,
{ "Route descriptor", "atm.lan_destination.route_desc", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_lan_destination_lan_id,
{ "LAN ID", "atm.lan_destination.lan_id", FT_UINT16, BASE_DEC, NULL, 0xFFF0,
NULL, HFILL }},
{ &hf_atm_lan_destination_bridge_num,
{ "Bridge number", "atm.lan_destination.bridge_num", FT_UINT16, BASE_DEC, NULL, 0x000F,
NULL, HFILL }},
{ &hf_atm_source_atm,
{ "Source ATM address", "atm.source_atm", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_target_atm,
{ "Target ATM address", "atm.target_atm", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_configure_join_frame_lan_type,
{ "LAN type", "atm.le_configure_join_frame.lan_type", FT_UINT8, BASE_HEX, VALS(le_control_lan_type_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_le_configure_join_frame_max_frame_size,
{ "Maximum frame size", "atm.le_configure_join_frame.max_frame_size", FT_UINT8, BASE_HEX, VALS(le_control_frame_size_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_le_configure_join_frame_num_tlvs,
{ "Number of TLVs", "atm.le_configure_join_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_configure_join_frame_elan_name_size,
{ "ELAN name size", "atm.le_configure_join_frame.elan_name_size", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_registration_frame_num_tlvs,
{ "Number of TLVs", "atm.le_registration_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_arp_frame_num_tlvs,
{ "Number of TLVs", "atm.le_arp_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_verify_frame_num_tlvs,
{ "Number of TLVs", "atm.le_verify_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_configure_join_frame_elan_name,
{ "ELAN name", "atm.le_configure_join_frame.elan_name", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_marker,
{ "Marker", "atm.le_control.marker", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_protocol,
{ "Protocol", "atm.le_control.protocol", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_version,
{ "Version", "atm.le_control.version", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_opcode,
{ "Opcode", "atm.le_control.opcode", FT_UINT16, BASE_HEX, VALS(le_control_opcode_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_status,
{ "Status", "atm.le_control.status", FT_UINT16, BASE_HEX, VALS(le_control_status_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_transaction_id,
{ "Transaction ID", "atm.le_control.transaction_id", FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_requester_lecid,
{ "Requester LECID", "atm.le_control.requester_lecid", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_flags,
{ "Flags", "atm.le_control.flag", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_le_control_flag_v2_capable,
{ "V2 capable", "atm.le_control.flag.v2_capable", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0002,
NULL, HFILL }},
{ &hf_atm_le_control_flag_selective_multicast,
{ "Selective multicast", "atm.le_control.flag.selective_multicast", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0004,
NULL, HFILL }},
{ &hf_atm_le_control_flag_v2_required,
{ "V2 required", "atm.le_control.flag.v2_required", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0008,
NULL, HFILL }},
{ &hf_atm_le_control_flag_proxy,
{ "Proxy", "atm.le_control.flag.flag_proxy", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0080,
NULL, HFILL }},
{ &hf_atm_le_control_flag_exclude_explorer_frames,
{ "Exclude explorer frames", "atm.le_control.flag.exclude_explorer_frames", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0200,
NULL, HFILL }},
{ &hf_atm_le_control_flag_address,
{ "Address", "atm.le_control.flag.address", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0001,
NULL, HFILL }},
{ &hf_atm_le_control_topology_change,
{ "Topology change", "atm.le_control.flag.topology_change", FT_BOOLEAN, 16, TFS(&tfs_remote_local), 0x0100,
NULL, HFILL }},
{ &hf_atm_traffic_type,
{ "Traffic type", "atm.traffic_type", FT_UINT8, BASE_DEC, VALS(aal5_hltype_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_traffic_vcmx,
{ "VC multiplexed traffic type", "atm.traffic.vcmx", FT_UINT8, BASE_DEC, VALS(vcmx_type_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_traffic_lane,
{ "LANE traffic type", "atm.traffic.lane", FT_UINT8, BASE_DEC, VALS(lane_type_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_traffic_ipsilon,
{ "Ipsilon traffic type", "atm.traffic.ipsilon", FT_UINT8, BASE_DEC, VALS(ipsilon_type_vals), 0x0,
NULL, HFILL }},
{ &hf_atm_cells,
{ "Cells", "atm.cells", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal5_uu,
{ "AAL5 UU", "atm.hf_atm.aal5t_uu", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal5_cpi,
{ "AAL5 CPI", "atm.hf_atm.aal5t_cpi", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal5_len,
{ "AAL5 len", "atm.aal5t_len", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal5_crc,
{ "AAL5 CRC", "atm.aal5t_crc", FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_payload_type,
{ "Payload Type", "atm.payload_type", FT_UINT8, BASE_DEC, NULL, 0x0E,
NULL, HFILL }},
{ &hf_atm_cell_loss_priority,
{ "Cell Loss Priority", "atm.cell_loss_priority", FT_BOOLEAN, 8, TFS(&tfs_low_high_priority), 0x01,
NULL, HFILL }},
{ &hf_atm_header_error_check,
{ "Header Error Check", "atm.header_error_check", FT_UINT8, BASE_HEX, NULL, 0,
NULL, HFILL }},
{ &hf_atm_channel,
{ "Channel", "atm.channel", FT_UINT16, BASE_DEC, VALS(atm_channel_vals), 0,
NULL, HFILL }},
{ &hf_atm_aa1_csi,
{ "CSI", "atm.aa1.csi", FT_UINT8, BASE_DEC, NULL, 0x80,
NULL, HFILL }},
{ &hf_atm_aa1_seq_count,
{ "Sequence Count", "atm.aa1.seq_count", FT_UINT8, BASE_DEC, NULL, 0x70,
NULL, HFILL }},
{ &hf_atm_aa1_crc,
{ "CRC", "atm.aa1.crc", FT_UINT8, BASE_DEC, NULL, 0x08,
NULL, HFILL }},
{ &hf_atm_aa1_parity,
{ "Parity", "atm.aa1.parity", FT_UINT8, BASE_DEC, NULL, 0x07,
NULL, HFILL }},
{ &hf_atm_aa1_payload,
{ "Payload", "atm.aa1.payload", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal3_4_seg_type,
{ "Segment Type", "atm.aal3_4.seg_type", FT_UINT16, BASE_DEC, VALS(st_vals), 0xC000,
NULL, HFILL }},
{ &hf_atm_aal3_4_seq_num,
{ "Sequence Number", "atm.aal3_4.seq_num", FT_UINT16, BASE_DEC, NULL, 0x3C00,
NULL, HFILL }},
{ &hf_atm_aal3_4_multiplex_id,
{ "Multiplex ID", "atm.aal3_4.multiplex_id", FT_UINT16, BASE_DEC, NULL, 0x03FF,
NULL, HFILL }},
{ &hf_atm_aal3_4_information,
{ "Information", "atm.aal3_4.information", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal3_4_length_indicator,
{ "Length Indicator", "atm.aal3_4.length_indicator", FT_UINT16, BASE_DEC, VALS(st_vals), 0xFC00,
NULL, HFILL }},
{ &hf_atm_aal3_4_crc,
{ "CRC", "atm.aal3_4.crc", FT_UINT16, BASE_DEC, NULL, 0x03FF,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_type,
{ "OAM Type", "atm.aal_oamcell.type", FT_UINT8, BASE_DEC, VALS(oam_type_vals), 0xF0,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_type_fm,
{ "Function Type", "atm.aal_oamcell.type.fm", FT_UINT8, BASE_DEC, VALS(ft_fm_vals), 0x0F,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_type_pm,
{ "Function Type", "atm.aal_oamcell.type.pm", FT_UINT8, BASE_DEC, VALS(ft_pm_vals), 0x0F,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_type_ad,
{ "Function Type", "atm.aal_oamcell.type.ad", FT_UINT8, BASE_DEC, VALS(ft_ad_vals), 0x0F,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_type_ft,
{ "Function Type", "atm.aal_oamcell.type.ft", FT_UINT8, BASE_DEC, NULL, 0x0F,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_func_spec,
{ "Function-specific information", "atm.aal_oamcell.func_spec", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_atm_aal_oamcell_crc,
{ "CRC-10", "atm.aal_oamcell.crc", FT_UINT16, BASE_HEX, NULL, 0x3FF,
NULL, HFILL }},
{ &hf_atm_padding,
{ "Padding", "atm.padding", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
};
static gint *ett[] = {
&ett_atm,
&ett_ilmi,
&ett_aal1,
&ett_aal3_4,
&ett_oamaal,
&ett_atm_lane,
&ett_atm_lane_lc_lan_dest,
&ett_atm_lane_lc_lan_dest_rd,
&ett_atm_lane_lc_flags,
&ett_atm_lane_lc_tlv,
};
static ei_register_info ei[] = {
{ &ei_atm_reassembly_failed, { "atm.reassembly_failed", PI_REASSEMBLE, PI_ERROR, "PDU reassembly failed", EXPFILL }},
};
expert_module_t* expert_atm;
module_t *atm_module;
/* Decode As handling */
static build_valid_func atm_da_build_value[1] = {atm_value};
static decode_as_value_t atm_da_values = {atm_prompt, 1, atm_da_build_value};
static decode_as_t atm_da = {"atm", "atm.aal2.type", 1, 0, &atm_da_values, NULL, NULL,
decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL};
proto_atm = proto_register_protocol("Asynchronous Transfer Mode", "ATM", "atm");
proto_aal1 = proto_register_protocol("ATM AAL1", "AAL1", "aal1");
proto_aal3_4 = proto_register_protocol("ATM AAL3/4", "AAL3/4", "aal3_4");
proto_oamaal = proto_register_protocol("ATM OAM AAL", "OAM AAL", "oamaal");
proto_register_field_array(proto_atm, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_atm = expert_register_protocol(proto_atm);
expert_register_field_array(expert_atm, ei, array_length(ei));
proto_ilmi = proto_register_protocol("ILMI", "ILMI", "ilmi");
proto_atm_lane = proto_register_protocol("ATM LAN Emulation", "ATM LANE", "lane");
atm_type_aal2_table = register_dissector_table("atm.aal2.type", "ATM AAL_2 type", proto_atm, FT_UINT32, BASE_DEC);
atm_type_aal5_table = register_dissector_table("atm.aal5.type", "ATM AAL_5 type", proto_atm, FT_UINT32, BASE_DEC);
atm_cell_payload_vpi_vci_table = register_dissector_table("atm.cell_payload.vpi_vci", "ATM Cell Payload VPI VCI",
proto_atm, FT_UINT32, BASE_DEC);
atm_reassembled_vpi_vci_table = register_dissector_table("atm.reassembled.vpi_vci", "ATM Reassembled VPI VCI",
proto_atm, FT_UINT32, BASE_DEC);
register_capture_dissector_table("atm.aal5.type", "ATM AAL_5");
register_capture_dissector_table("atm_lane", "ATM LAN Emulation");
atm_handle = register_dissector("atm_truncated", dissect_atm_truncated, proto_atm);
register_dissector("atm_pw_truncated", dissect_atm_pw_truncated, proto_atm);
atm_untruncated_handle = register_dissector("atm_untruncated", dissect_atm_untruncated, proto_atm);
register_dissector("atm_pw_untruncated", dissect_atm_pw_untruncated, proto_atm);
register_dissector("atm_oam_cell", dissect_atm_oam_cell, proto_oamaal);
register_dissector("atm_pw_oam_cell", dissect_atm_pw_oam_cell, proto_oamaal);
atm_module = prefs_register_protocol ( proto_atm, NULL );
prefs_register_bool_preference(atm_module, "dissect_lane_as_sscop", "Dissect LANE as SSCOP",
"Autodetection between LANE and SSCOP is hard. As default LANE is preferred",
&dissect_lanesscop);
prefs_register_obsolete_preference(atm_module, "unknown_aal2_type");
register_decode_as(&atm_da);
}
void
proto_reg_handoff_atm(void)
{
capture_dissector_handle_t atm_cap_handle;
/*
* Get handles for the Ethernet, Token Ring, Frame Relay, LLC,
* SSCOP, LANE, and ILMI dissectors.
*/
eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_atm_lane);
tr_handle = find_dissector_add_dependency("tr", proto_atm_lane);
fr_handle = find_dissector_add_dependency("fr", proto_atm);
llc_handle = find_dissector_add_dependency("llc", proto_atm);
sscop_handle = find_dissector_add_dependency("sscop", proto_atm);
ppp_handle = find_dissector_add_dependency("ppp", proto_atm);
eth_maybefcs_handle = find_dissector_add_dependency("eth_maybefcs", proto_atm);
ip_handle = find_dissector_add_dependency("ip", proto_atm);
dissector_add_uint("wtap_encap", WTAP_ENCAP_ATM_PDUS, atm_handle);
dissector_add_uint("atm.aal5.type", TRAF_LANE, create_dissector_handle(dissect_lane, proto_atm_lane));
dissector_add_uint("atm.aal5.type", TRAF_ILMI, create_dissector_handle(dissect_ilmi, proto_ilmi));
dissector_add_uint("wtap_encap", WTAP_ENCAP_ATM_PDUS_UNTRUNCATED,
atm_untruncated_handle);
atm_cap_handle = create_capture_dissector_handle(capture_atm, proto_atm);
capture_dissector_add_uint("wtap_encap", WTAP_ENCAP_ATM_PDUS, atm_cap_handle);
atm_cap_handle = create_capture_dissector_handle(capture_lane, proto_atm_lane);
capture_dissector_add_uint("atm.aal5.type", TRAF_LANE, atm_cap_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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