diff options
Diffstat (limited to 'epan/dissectors/packet-dlsw.c')
| -rw-r--r-- | epan/dissectors/packet-dlsw.c | 694 |
1 files changed, 694 insertions, 0 deletions
diff --git a/epan/dissectors/packet-dlsw.c b/epan/dissectors/packet-dlsw.c new file mode 100644 index 00000000..281f2d31 --- /dev/null +++ b/epan/dissectors/packet-dlsw.c @@ -0,0 +1,694 @@ +/* packet-dlsw.c + * Routines for DLSw packet dissection (Data Link Switching) + * Copyright 2001, Paul Ionescu <paul@acorp.ro> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +/* DLSw dissector ( RFC 1434, RFC 1795, RFC 2166) */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/exceptions.h> +#include <epan/expert.h> + +#include "packet-tcp.h" + +void proto_register_dlsw(void); +void proto_reg_handoff_dlsw(void); + +static dissector_handle_t dlsw_udp_handle; +static dissector_handle_t dlsw_tcp_handle; + +static int proto_dlsw = -1; +static int hf_dlsw_flow_control_indication = -1; +static int hf_dlsw_flow_control_ack = -1; +static int hf_dlsw_flow_control_operator = -1; +static int hf_dlsw_flags_explorer_msg = -1; +/* Generated from convert_proto_tree_add_text.pl */ +static int hf_dlsw_vector_length = -1; +static int hf_dlsw_dlc_header_sa = -1; +static int hf_dlsw_dlc_header_fc_byte = -1; +static int hf_dlsw_target_transport_id = -1; +static int hf_dlsw_error_pointer = -1; +static int hf_dlsw_capabilities_length = -1; +static int hf_dlsw_multicast_version_number = -1; +static int hf_dlsw_frame_direction = -1; +static int hf_dlsw_circuit_priority = -1; +static int hf_dlsw_origin_dlc_port_id = -1; +static int hf_dlsw_protocol_id = -1; +static int hf_dlsw_mac_address_list = -1; +static int hf_dlsw_origin_link_sap = -1; +static int hf_dlsw_header_length = -1; +static int hf_dlsw_dlc_header_ctrl = -1; +static int hf_dlsw_target_dlc_port_id = -1; +static int hf_dlsw_vector_type = -1; +static int hf_dlsw_largest_frame_size = -1; +static int hf_dlsw_error_cause = -1; +static int hf_dlsw_dlc_header_length = -1; +static int hf_dlsw_oui = -1; +static int hf_dlsw_target_dlc = -1; +static int hf_dlsw_dlc_header_ac_byte = -1; +static int hf_dlsw_tcp_connections = -1; +static int hf_dlsw_initial_pacing_window = -1; +static int hf_dlsw_old_message_type = -1; +static int hf_dlsw_capex_type = -1; +static int hf_dlsw_ssp_flags = -1; +static int hf_dlsw_target_mac_address = -1; +static int hf_dlsw_origin_mac_address = -1; +static int hf_dlsw_dlc_header_rif = -1; +static int hf_dlsw_message_type = -1; +static int hf_dlsw_header_number = -1; +static int hf_dlsw_message_length = -1; +static int hf_dlsw_remote_dlc_pid = -1; +static int hf_dlsw_vendor_oui = -1; +static int hf_dlsw_flow_ctrl_byte = -1; +static int hf_dlsw_version = -1; +static int hf_dlsw_version_string = -1; +static int hf_dlsw_dlsw_version = -1; +static int hf_dlsw_remote_dlc = -1; +static int hf_dlsw_origin_dlc = -1; +static int hf_dlsw_origin_transport_id = -1; +static int hf_dlsw_dlc_header_ssap = -1; +static int hf_dlsw_target_link_sap = -1; +static int hf_dlsw_dlc_header_da = -1; +static int hf_dlsw_netbios_name = -1; +static int hf_dlsw_dlc_header_dsap = -1; +static int hf_dlsw_reserved = -1; +static int hf_dlsw_data = -1; +static int hf_dlsw_vector_data = -1; +static int hf_dlsw_unknown_data = -1; +static int hf_dlsw_mac_address_exclusivity = -1; +static int hf_dlsw_netbios_name_exclusivity = -1; +static int hf_dlsw_gds_id = -1; +static int hf_dlsw_sap_list_support = -1; +static int hf_dlsw_sap_list_support_x0 = -1; +static int hf_dlsw_sap_list_support_x2 = -1; +static int hf_dlsw_sap_list_support_x4 = -1; +static int hf_dlsw_sap_list_support_x6 = -1; +static int hf_dlsw_sap_list_support_x8 = -1; +static int hf_dlsw_sap_list_support_xA = -1; +static int hf_dlsw_sap_list_support_xC = -1; +static int hf_dlsw_sap_list_support_xE = -1; + +static gint ett_dlsw = -1; +static gint ett_dlsw_header = -1; +static gint ett_dlsw_fc = -1; +static gint ett_dlsw_sspflags = -1; +static gint ett_dlsw_data = -1; +static gint ett_dlsw_vector = -1; +static gint ett_dlsw_sap_list_support = -1; + +static expert_field ei_dlsw_dlc_header_length = EI_INIT; +static expert_field ei_dlsw_not_used_for_capex = EI_INIT; +static expert_field ei_dlsw_vec_len_invalid = EI_INIT; + +#define CANUREACH 0x03 +#define ICANREACH 0x04 +#define REACH_ACK 0x05 +#define DGRMFRAME 0x06 +#define XIDFRAME 0x07 +#define CONTACT 0x08 +#define CONTACTED 0x09 +#define RESTART_DL 0x10 +#define DL_RESTARTED 0x11 +#define ENTER_BUSY 0x0C +#define EXIT_BUSY 0x0D +#define INFOFRAME 0x0A +#define HALT_DL 0x0E +#define DL_HALTED 0x0F +#define NETBIOS_NQ 0x12 +#define NETBIOS_NR 0x13 +#define DATAFRAME 0x14 +#define HALT_DL_NOACK 0x19 +#define NETBIOS_ANQ 0x1A +#define NETBIOS_ANR 0x1B +#define KEEPALIVE 0x1D +#define CAP_EXCHANGE 0x20 +#define IFCM 0x21 +#define TEST_CIRCUIT_REQ 0x7A +#define TEST_CIRCUIT_RSP 0x7B + +static const value_string dlsw_type_vals[] = { + { CANUREACH , "Can U Reach Station-circuit start" }, + { ICANREACH , "I Can Reach Station-circuit start" }, + { REACH_ACK , "Reach Acknowledgment" }, + { DGRMFRAME , "Datagram Frame" }, + { XIDFRAME , "XID Frame" }, + { CONTACT , "Contact Remote Station" }, + { CONTACTED , "Remote Station Contacted" }, + { RESTART_DL , "Restart Data Link" }, + { DL_RESTARTED , "Data Link Restarted" }, + { ENTER_BUSY , "Enter Busy" }, + { EXIT_BUSY , "Exit Busy" }, + { INFOFRAME , "Information (I) Frame" }, + { HALT_DL , "Halt Data Link" }, + { DL_HALTED , "Data Link Halted" }, + { NETBIOS_NQ , "NETBIOS Name Query-circuit setup" }, + { NETBIOS_NR , "NETBIOS Name Recog-circuit setup" }, + { DATAFRAME , "Data Frame" }, + { HALT_DL_NOACK , "Halt Data Link with no Ack" }, + { NETBIOS_ANQ , "NETBIOS Add Name Query" }, + { NETBIOS_ANR , "NETBIOS Add Name Response" }, + { KEEPALIVE , "Transport Keepalive Message" }, + { CAP_EXCHANGE , "Capabilities Exchange" }, + { IFCM , "Independent Flow Control Message" }, + { TEST_CIRCUIT_REQ , "Test Circuit Request" }, + { TEST_CIRCUIT_RSP , "Test Circuit Response" }, + { 0 , NULL } +}; +static const value_string dlsw_version_vals[] = { + { 0x31 , "Version 1 (RFC 1795)" }, + { 0x32 , "Version 2 (RFC 2166)" }, + { 0x33 , "Vendor Specific" }, + { 0x34 , "Vendor Specific" }, + { 0x35 , "Vendor Specific" }, + { 0x36 , "Vendor Specific" }, + { 0x37 , "Vendor Specific" }, + { 0x38 , "Vendor Specific" }, + { 0x39 , "Vendor Specific" }, + { 0x3A , "Vendor Specific" }, + { 0x3B , "Vendor Specific" }, + { 0x3C , "Vendor Specific" }, + { 0x3D , "Vendor Specific" }, + { 0x3E , "Vendor Specific" }, + { 0x3F , "Vendor Specific" }, + { 0x4B , "Pre 1 (RFC 1434)" }, + { 0x00 , NULL } +}; + +static const value_string dlsw_fc_cmd_vals[] = { + { 0x00 , "Repeat Window" }, + { 0x01 , "Increment Window" }, + { 0x02 , "Decrement Window" }, + { 0x03 , "Reset Window" }, + { 0x04 , "Halve Window" }, + { 0x00 , NULL } +}; + +static const value_string dlsw_capex_type_vals[] = { + { 0x01 , "Capabilities request" }, + { 0x02 , "Capabilities response" }, + { 0x00 , NULL } +}; + +static const value_string dlsw_frame_direction_vals[] = { + { 0x01 , "Origin DLSw to target DLSw" }, + { 0x02 , "Target DLSw to origin DLSw" }, + { 0x00 , NULL } +}; + +static const value_string dlsw_vector_vals[] = { + { 0x81 , "Vendor ID Control Vector" }, + { 0x82 , "DLSw Version Control Vector" }, + { 0x83 , "Initial Pacing Window Control Vector" }, + { 0x84 , "Version String Control Vector" }, + { 0x85 , "Mac Address Exclusivity Control Vector" }, + { 0x86 , "Supported SAP List Control Vector" }, + { 0x87 , "TCP Connections Control Vector" }, + { 0x88 , "NetBIOS Name Exclusivity Control Vector" }, + { 0x89 , "MAC Address List Control Vector" }, + { 0x8a , "NetBIOS Name List Control Vector" }, + { 0x8b , "Vendor Context Control Vector" }, + { 0x8c , "Multicast Capabilities Control Vector" }, + { 0x8d , "Reserved for future use" }, + { 0x8e , "Reserved for future use" }, + { 0x8f , "Reserved for future use" }, + { 0x90 , "Reserved for future use" }, + { 0x91 , " Control Vector" }, + { 0x92 , " Control Vector" }, + { 0x93 , " Control Vector" }, + { 0x94 , " Control Vector" }, + { 0x95 , " Control Vector" }, + { 0x96 , " Control Vector" }, + { 0x00 , NULL } +}; + +static const value_string dlsw_pri_vals[] = { + { 0 , "Unsupported" }, + { 1 , "Low Priority" }, + { 2 , "Medium Priority" }, + { 3 , "High Priority" }, + { 4 , "Highest Priority" }, + { 5 , "Reserved" }, + { 6 , "Reserved" }, + { 7 , "Reserved" }, + { 0, NULL } +}; + + + + +#define DLSW_GDSID_SEND 0x1520 +#define DLSW_GDSID_ACK 0x1521 +#define DLSW_GDSID_REF 0x1522 + +static const value_string dlsw_gds_vals[] = { + { DLSW_GDSID_SEND , "Request Capabilities GDS" }, + { DLSW_GDSID_ACK , "Response Capabilities GDS" }, + { DLSW_GDSID_REF , "Refuse Capabilities GDS" }, + { 0 , NULL } +}; + +static const value_string dlsw_refuse_vals[] = { + { 0x1 , "invalid GDS length for a DLWs Capabilities Exchange Request"}, + { 0x2 , "invalid GDS id for a DLSw Capabilities Exchange Request"}, + { 0x3 , "vendor Id control vector is missing"}, + { 0x4 , "DLSw Version control vector is missing"}, + { 0x5 , "initial Pacing Window control vector is missing"}, + { 0x6 , "length of control vectors doesn't correlate to the length of the GDS variable"}, + { 0x7 , "invalid control vector id"}, + { 0x8 , "length of control vector invalid"}, + { 0x9 , "invalid control vector data value"}, + { 0xa , "duplicate control vector"}, + { 0xb , "out-of-sequence control vector"}, + { 0xc , "DLSw Supported SAP List control vector is missing"}, + { 0xd , "inconsistent DLSw Version, Multicast Capabilities, and TCP Connections CV received on the inbound Capabilities exchange"}, + { 0x0 , NULL } +}; + +#define UDP_PORT_DLSW 2067 +#define TCP_PORT_DLSW 2065 +#define DLSW_INFO_HEADER 16 +#define DLSW_CMD_HEADER 72 + +static void +dissect_dlsw_capex(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *ti2); + +static int +dissect_dlsw_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) +{ + guint version,hlen = 0,mlen = 0,mtype,dlchlen = 0,flags; + proto_tree *dlsw_tree, *dlsw_header_tree = NULL; + proto_item *ti,*ti2; + proto_tree *dlsw_flags_tree,*dlsw_data_tree; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "DLSw"); + + version=tvb_get_guint8(tvb,0); + + col_add_fstr(pinfo->cinfo, COL_INFO, "DLSw %s",val_to_str_const(version , dlsw_version_vals, "Unknown Version")); + + ti = proto_tree_add_item(tree, proto_dlsw, tvb, 0, -1, ENC_NA); + dlsw_tree = proto_item_add_subtree(ti, ett_dlsw); + + hlen=tvb_get_guint8(tvb,1); + + dlsw_header_tree = proto_tree_add_subtree_format(dlsw_tree, tvb, 0, hlen, ett_dlsw_header, NULL, + "DLSw header, %s", + val_to_str_const(version , dlsw_version_vals, "Unknown Version")); + + proto_tree_add_item(dlsw_header_tree, hf_dlsw_version, tvb, 0, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_header_length, tvb, 1, 1, ENC_BIG_ENDIAN); + mlen=tvb_get_ntohs(tvb,2); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_message_length, tvb, 2, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_remote_dlc, tvb, 4, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_remote_dlc_pid, tvb, 8, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_reserved, tvb, 12, 2, ENC_NA) ; + + mtype=tvb_get_guint8(tvb,14); + col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",val_to_str_const(mtype , dlsw_type_vals, "Unknown message Type")); + + proto_tree_add_item(dlsw_header_tree, hf_dlsw_message_type, tvb, 14, 1, ENC_BIG_ENDIAN); + if (mtype==CAP_EXCHANGE) + { + proto_tree_add_expert(dlsw_header_tree, pinfo, &ei_dlsw_not_used_for_capex, tvb, 15, 1); + } + else + { + flags = tvb_get_guint8(tvb,15); + ti2 = proto_tree_add_item(dlsw_header_tree, hf_dlsw_flow_ctrl_byte, tvb, 15, 1, ENC_BIG_ENDIAN); + dlsw_flags_tree = proto_item_add_subtree(ti2, ett_dlsw_fc); + proto_tree_add_item(dlsw_flags_tree, hf_dlsw_flow_control_indication, tvb, 15, 1, ENC_BIG_ENDIAN); + if (flags & 0x80) + { + proto_tree_add_item(dlsw_flags_tree, hf_dlsw_flow_control_ack, tvb, 15, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_flags_tree, hf_dlsw_flow_control_operator, tvb, 15, 1, ENC_BIG_ENDIAN); + } + } + if (hlen != DLSW_INFO_HEADER) + { + if (mtype==CAP_EXCHANGE) + { + proto_tree_add_item(dlsw_header_tree, hf_dlsw_protocol_id, tvb, 16, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_header_number, tvb, 17, 1, ENC_BIG_ENDIAN); + proto_tree_add_expert(dlsw_header_tree, pinfo, &ei_dlsw_not_used_for_capex, tvb, 18, 5); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_old_message_type, tvb, 23, 1, ENC_BIG_ENDIAN); + proto_tree_add_expert(dlsw_header_tree, pinfo, &ei_dlsw_not_used_for_capex, tvb, 24, 14); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_capex_type, tvb, 38, 1, ENC_BIG_ENDIAN); + proto_tree_add_expert(dlsw_header_tree, pinfo, &ei_dlsw_not_used_for_capex, tvb, 39, 33); + } + else + { + proto_tree_add_item(dlsw_header_tree, hf_dlsw_protocol_id, tvb, 16, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_header_number, tvb, 17, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_reserved, tvb, 18, 2, ENC_NA) ; + proto_tree_add_item(dlsw_header_tree, hf_dlsw_largest_frame_size, tvb, 20, 1, ENC_BIG_ENDIAN); + ti2 = proto_tree_add_item(dlsw_header_tree, hf_dlsw_ssp_flags, tvb, 21, 1, ENC_BIG_ENDIAN); + dlsw_flags_tree = proto_item_add_subtree(ti2, ett_dlsw_sspflags); + proto_tree_add_item (dlsw_flags_tree, hf_dlsw_flags_explorer_msg, tvb, 21, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_circuit_priority, tvb, 22, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_old_message_type, tvb, 23, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_target_mac_address, tvb, 24, 6, ENC_NA); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_origin_mac_address, tvb, 30, 6, ENC_NA); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_origin_link_sap, tvb, 36, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_target_link_sap, tvb, 37, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_frame_direction, tvb, 38, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_reserved, tvb, 39, 3, ENC_NA) ; + dlchlen=tvb_get_ntohs(tvb,42); + ti = proto_tree_add_item(dlsw_header_tree, hf_dlsw_dlc_header_length, tvb, 42, 2, ENC_BIG_ENDIAN); + if ( dlchlen > mlen ) + { + expert_add_info_format(pinfo, ti, &ei_dlsw_dlc_header_length, + "DLC Header Length = %u (bogus, must be <= message length %u)",dlchlen, mlen) ; + return 44; + } + proto_tree_add_item(dlsw_header_tree, hf_dlsw_origin_dlc_port_id, tvb, 44, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_origin_dlc, tvb, 48, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_origin_transport_id, tvb, 52, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_target_dlc_port_id, tvb, 56, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_target_dlc, tvb, 60, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_target_transport_id, tvb, 64, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_header_tree, hf_dlsw_reserved, tvb, 68, 4, ENC_NA) ; + } + } + + /* end of header dissector */ + + dlsw_data_tree = proto_tree_add_subtree(dlsw_tree, tvb, hlen, mlen, ett_dlsw_data, &ti2, "DLSw data"); + + switch (mtype) + { + case CAP_EXCHANGE: + dissect_dlsw_capex(tvb_new_subset_length_caplen(tvb, hlen, mlen, -1), pinfo, dlsw_data_tree, ti2); + break; + case IFCM: + case INFOFRAME: + case KEEPALIVE: + proto_tree_add_item(dlsw_data_tree, hf_dlsw_data, tvb, hlen, mlen, ENC_NA); + break; + + default: + if (dlchlen!=0) + { + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_ac_byte, tvb, hlen, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_fc_byte, tvb, hlen+1, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_da, tvb, hlen+2, 6, ENC_NA|ENC_ASCII); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_sa, tvb, hlen+8, 6, ENC_NA|ENC_ASCII); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_rif, tvb, hlen+14, 18, ENC_NA|ENC_ASCII); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_dsap, tvb, hlen+32, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_ssap, tvb, hlen+33, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_data_tree, hf_dlsw_dlc_header_ctrl, tvb, hlen+34, 1, ENC_BIG_ENDIAN); + } + proto_tree_add_item(dlsw_data_tree, hf_dlsw_data, tvb, hlen+dlchlen, mlen-dlchlen, ENC_NA); + } + + return tvb_captured_length(tvb); +} + +static void +dlsw_fmt_version( gchar *result, guint32 revision ) +{ + snprintf( result, ITEM_LABEL_LENGTH, "%d.%02d", (guint8)(( revision & 0xFF00 ) >> 8), (guint8)(revision & 0xFF) ); +} + +static void +dissect_dlsw_capex(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *ti2) +{ + int vlen,vtype,i=0; + guint8 tmp8; + guint32 gdsid, mlen,offset=4; + proto_tree *dlsw_vector_tree; + proto_tree_add_item_ret_uint(tree, hf_dlsw_capabilities_length, tvb, 0, 2, ENC_BIG_ENDIAN, &mlen); + proto_tree_add_item_ret_uint(tree, hf_dlsw_gds_id, tvb, 2, 2, ENC_BIG_ENDIAN, &gdsid); + proto_item_append_text(ti2," - %s",val_to_str_const( gdsid, dlsw_gds_vals, "Invalid GDS ID")); + switch (gdsid) { + case DLSW_GDSID_ACK: + break; + case DLSW_GDSID_REF: + proto_tree_add_item(tree, hf_dlsw_error_pointer, tvb, 4, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(tree, hf_dlsw_error_cause, tvb, 6, 2, ENC_BIG_ENDIAN); + break; + case DLSW_GDSID_SEND: + while (offset < mlen){ + vlen=tvb_get_guint8(tvb,offset); + if (vlen < 3) { + proto_tree_add_expert(tree, pinfo, &ei_dlsw_vec_len_invalid, tvb, offset, 1); + return; + } + vtype=tvb_get_guint8(tvb,offset+1); + dlsw_vector_tree=proto_tree_add_subtree (tree,tvb,offset,vlen,ett_dlsw_vector,NULL, + val_to_str_const(vtype,dlsw_vector_vals,"Unknown vector type")); + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_vector_length, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_vector_type, tvb, offset+1, 1, ENC_BIG_ENDIAN); + switch (vtype){ + case 0x81: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_oui, tvb, offset+2, vlen-2, ENC_BIG_ENDIAN); + break; + case 0x82: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_dlsw_version, tvb, offset+2, 2, ENC_BIG_ENDIAN); + break; + case 0x83: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_initial_pacing_window, tvb, offset+2, vlen-2, ENC_BIG_ENDIAN); + break; + case 0x84: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_version_string, tvb, offset+2, vlen-2, ENC_NA|ENC_ASCII); + break; + case 0x85: + tmp8 = tvb_get_guint8(tvb,offset+2); + proto_tree_add_uint_format_value(dlsw_vector_tree, hf_dlsw_mac_address_exclusivity, tvb,offset+2, 1, + tmp8, "%s",tmp8==1?"On":"Off"); + break; + case 0x86: + while (i<vlen-2) + { + static int * const flags[] = { + &hf_dlsw_sap_list_support_x0, + &hf_dlsw_sap_list_support_x2, + &hf_dlsw_sap_list_support_x4, + &hf_dlsw_sap_list_support_x6, + &hf_dlsw_sap_list_support_x8, + &hf_dlsw_sap_list_support_xA, + &hf_dlsw_sap_list_support_xC, + &hf_dlsw_sap_list_support_xE, + NULL + }; + + proto_tree_add_bitmask_with_flags(dlsw_vector_tree, tvb, offset+2+i, hf_dlsw_sap_list_support, ett_dlsw_sap_list_support, flags, ENC_NA, BMT_NO_FALSE); + i++; + } + break; + case 0x87: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_tcp_connections, tvb, offset+2, vlen-2, ENC_BIG_ENDIAN); + break; + case 0x88: + tmp8 = tvb_get_guint8(tvb,offset+2); + proto_tree_add_uint_format_value(dlsw_vector_tree, hf_dlsw_netbios_name_exclusivity, tvb,offset+2,1, + tmp8, "%s", tmp8==1?"On":"Off"); + break; + case 0x89: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_mac_address_list, tvb, offset+2, 6, ENC_NA); + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_mac_address_list, tvb, offset+8, 6, ENC_NA); + break; + case 0x8a: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_netbios_name, tvb, offset+2, vlen-2, ENC_NA|ENC_ASCII); + break; + case 0x8b: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_vendor_oui, tvb, offset+2, vlen-2, ENC_BIG_ENDIAN); + break; + case 0x8c: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_multicast_version_number, tvb, offset+2, vlen-2, ENC_BIG_ENDIAN); + break; + default: + proto_tree_add_item(dlsw_vector_tree, hf_dlsw_vector_data, tvb, offset+2, vlen-2, ENC_NA); + } + offset+=vlen; + }; + break; + default: + proto_tree_add_item(tree, hf_dlsw_unknown_data, tvb, 4, mlen - 4, ENC_NA); + } + +} + +static int +dissect_dlsw_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) +{ + if (try_val_to_str(tvb_get_guint8(tvb, 0), dlsw_version_vals) == NULL) + { + /* Probably not a DLSw packet. */ + return 0; + } + + return dissect_dlsw_pdu(tvb, pinfo, tree, data); +} + +static guint +get_dlsw_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_) +{ + guint hlen, mlen; + + /* + * Get the length of the DLSw header. + */ + hlen=tvb_get_guint8(tvb,offset+1); + + /* + * Get the length of the DLSw message. + */ + mlen = tvb_get_ntohs(tvb,offset+2); + + /* + * The total length is the sum of those. + */ + return hlen + mlen; +} + +static int +dissect_dlsw_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) +{ + if (try_val_to_str(tvb_get_guint8(tvb, 0), dlsw_version_vals) == NULL) + { + /* Probably not a DLSw packet. */ + return 0; + } + + tcp_dissect_pdus(tvb, pinfo, tree, TRUE, 4, get_dlsw_pdu_len, dissect_dlsw_pdu, data); + return tvb_captured_length(tvb); +} + +void +proto_register_dlsw(void) +{ + static hf_register_info hf[] = { + {&hf_dlsw_flow_control_indication, + {"Flow Control Indication", "dlsw.flow_control_indication", FT_BOOLEAN, 8, TFS(&tfs_yes_no), 0x80, + NULL, HFILL}}, + {&hf_dlsw_flow_control_ack, + {"Flow Control Acknowledgment", "dlsw.flow_control_ack", FT_BOOLEAN, 8, TFS(&tfs_yes_no), 0x40, + NULL, HFILL}}, + {&hf_dlsw_flow_control_operator, + {"Flow Control Operator", "dlsw.flow_control_operator", FT_UINT8, BASE_DEC, VALS(dlsw_fc_cmd_vals), 0x07, + NULL, HFILL}}, + {&hf_dlsw_flags_explorer_msg, + {"Explorer message", "dlsw.flags.explorer_msg", FT_BOOLEAN, 8, TFS(&tfs_yes_no), 0x80, + NULL, HFILL}}, + /* Generated from convert_proto_tree_add_text.pl */ + { &hf_dlsw_version, { "Version", "dlsw.version", FT_UINT8, BASE_DEC, VALS(dlsw_version_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_header_length, { "Header Length", "dlsw.header_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_message_length, { "Message Length", "dlsw.message_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_remote_dlc, { "Remote DLC", "dlsw.remote_dlc", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_remote_dlc_pid, { "Remote DLC PID", "dlsw.remote_dlc_pid", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_message_type, { "Message Type", "dlsw.message_type", FT_UINT8, BASE_HEX, VALS(dlsw_type_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_flow_ctrl_byte, { "Flow ctrl byte", "dlsw.flow_ctrl_byte", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_protocol_id, { "Protocol ID", "dlsw.protocol_id", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_header_number, { "Header Number", "dlsw.header_number", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_old_message_type, { "Old message type", "dlsw.old_message_type", FT_UINT8, BASE_HEX, VALS(dlsw_type_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_capex_type, { "Capability exchange type", "dlsw.capex_type", FT_UINT8, BASE_HEX, VALS(dlsw_capex_type_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_largest_frame_size, { "Largest Frame size", "dlsw.largest_frame_size", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_ssp_flags, { "SSP Flags", "dlsw.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_circuit_priority, { "Circuit priority", "dlsw.circuit_priority", FT_UINT8, BASE_DEC, VALS(dlsw_pri_vals), 0x7, NULL, HFILL }}, + { &hf_dlsw_target_mac_address, { "Target MAC Address", "dlsw.target_mac_address", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_origin_mac_address, { "Origin MAC Address", "dlsw.origin_mac_address", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_origin_link_sap, { "Origin Link SAP", "dlsw.origin_link_sap", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_target_link_sap, { "Target Link SAP", "dlsw.target_link_sap", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_frame_direction, { "Frame direction", "dlsw.frame_direction", FT_UINT8, BASE_HEX, VALS(dlsw_frame_direction_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_length, { "DLC Header Length", "dlsw.dlc_header_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_origin_dlc_port_id, { "Origin DLC Port ID", "dlsw.origin_dlc_port_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_origin_dlc, { "Origin DLC", "dlsw.origin_dlc", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_origin_transport_id, { "Origin Transport ID", "dlsw.origin_transport_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_target_dlc_port_id, { "Target DLC Port ID", "dlsw.target_dlc_port_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_target_dlc, { "Target DLC", "dlsw.target_dlc", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_target_transport_id, { "Target Transport ID", "dlsw.target_transport_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_ac_byte, { "DLC Header - AC byte", "dlsw.dlc_header.ac_byte", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_fc_byte, { "DLC Header - FC byte", "dlsw.dlc_header.fc_byte", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_da, { "DLC Header - DA", "dlsw.dlc_header.da", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_sa, { "DLC Header - SA", "dlsw.dlc_header.sa", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_rif, { "DLC Header - RIF", "dlsw.dlc_header.rif", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_dsap, { "DLC Header - DSAP", "dlsw.dlc_header.dsap", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_ssap, { "DLC Header - SSAP", "dlsw.dlc_header.ssap", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlc_header_ctrl, { "DLC Header - Ctrl", "dlsw.dlc_header.ctrl", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_capabilities_length, { "Capabilities Length", "dlsw.capabilities_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_error_pointer, { "Error pointer", "dlsw.error_pointer", FT_INT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_error_cause, { "Error cause", "dlsw.error_cause", FT_UINT16, BASE_HEX, VALS(dlsw_refuse_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_vector_length, { "Vector Length", "dlsw.vector_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_vector_type, { "Vector Type", "dlsw.vector_type", FT_UINT8, BASE_HEX, VALS(dlsw_vector_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_oui, { "OUI", "dlsw.oui", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_initial_pacing_window, { "Initial Pacing Window", "dlsw.initial_pacing_window", FT_INT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_dlsw_version, { "DLSw Version", "dlsw.dlsw_version", FT_UINT16, BASE_CUSTOM, CF_FUNC(dlsw_fmt_version), 0x0, NULL, HFILL }}, + { &hf_dlsw_version_string, { "Version String", "dlsw.version_string", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_tcp_connections, { "TCP connections", "dlsw.tcp_connections", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_mac_address_list, { "MAC Address List", "dlsw.mac_address_list", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_netbios_name, { "NetBIOS name", "dlsw.netbios_name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_vendor_oui, { "Vendor OUI", "dlsw.vendor_oui", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_multicast_version_number, { "Multicast Version Number", "dlsw.multicast_version_number", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_reserved, { "Reserved", "dlsw.reserved", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_data, { "Data", "dlsw.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_vector_data, { "Data", "dlsw.vector_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_unknown_data, { "Data", "dlsw.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_mac_address_exclusivity, { "MAC Address Exclusivity", "dlsw.mac_address_exclusivity", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_netbios_name_exclusivity, { "NetBIOS Name Exclusivity", "dlsw.netbios_name_exclusivity", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_gds_id, { "GDS ID", "dlsw.gds_id", FT_UINT16, BASE_DEC, VALS(dlsw_gds_vals), 0x0, NULL, HFILL }}, + { &hf_dlsw_sap_list_support, { "SAP List Support", "dlsw.sap_list_support", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_x0, { "x0", "dlsw.sap_list_support.x0", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x80, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_x2, { "x2", "dlsw.sap_list_support.x2", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x40, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_x4, { "x4", "dlsw.sap_list_support.x4", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x20, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_x6, { "x6", "dlsw.sap_list_support.x6", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x10, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_x8, { "x8", "dlsw.sap_list_support.x8", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x08, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_xA, { "xA", "dlsw.sap_list_support.xA", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x04, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_xC, { "xC", "dlsw.sap_list_support.xC", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x02, NULL, HFILL }}, + { &hf_dlsw_sap_list_support_xE, { "xE", "dlsw.sap_list_support.xE", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x01, NULL, HFILL }}, + }; + + static gint *ett[] = { + &ett_dlsw, + &ett_dlsw_header, + &ett_dlsw_fc, + &ett_dlsw_sspflags, + &ett_dlsw_data, + &ett_dlsw_vector, + &ett_dlsw_sap_list_support, + }; + + static ei_register_info ei[] = { + { &ei_dlsw_dlc_header_length, { "dlsw.dlc_header_length.bogus", PI_PROTOCOL, PI_WARN, "DLC Header Length bogus", EXPFILL }}, + { &ei_dlsw_not_used_for_capex, { "dlsw.not_used_for_capex", PI_PROTOCOL, PI_NOTE, "Not used for CapEx", EXPFILL }}, + { &ei_dlsw_vec_len_invalid, { "dlsw.vec_len_invalid", PI_MALFORMED, PI_ERROR, "Invalid vector length (must be >=3)", EXPFILL }} + }; + + expert_module_t* expert_dlsw; + + proto_dlsw = proto_register_protocol("Data Link SWitching", "DLSw", "dlsw"); + proto_register_field_array(proto_dlsw, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + expert_dlsw = expert_register_protocol(proto_dlsw); + expert_register_field_array(expert_dlsw, ei, array_length(ei)); + + dlsw_udp_handle = register_dissector("dlsw.udp", dissect_dlsw_udp, proto_dlsw); + dlsw_tcp_handle = register_dissector("dlsw.tcp", dissect_dlsw_tcp, proto_dlsw); +} + +void +proto_reg_handoff_dlsw(void) +{ + dissector_add_uint_with_preference("udp.port", UDP_PORT_DLSW, dlsw_udp_handle); + dissector_add_uint_with_preference("tcp.port", TCP_PORT_DLSW, dlsw_tcp_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: + */ |