diff options
Diffstat (limited to 'epan/dissectors/packet-forces.c')
| -rw-r--r-- | epan/dissectors/packet-forces.c | 898 |
1 files changed, 898 insertions, 0 deletions
diff --git a/epan/dissectors/packet-forces.c b/epan/dissectors/packet-forces.c new file mode 100644 index 00000000..d395e378 --- /dev/null +++ b/epan/dissectors/packet-forces.c @@ -0,0 +1,898 @@ +/* packet-forces.c + * RFC 5810 + * Routines for dissecting IETF ForCES protocol layer messages.Now support the following TML types:TCP+UDP,SCTP. + * Copyright 2009, NDSC & Zhejiang Gongshang University,Fenggen Jia <fgjia@mail.zjgsu.edu.cn or fenggen.jia@gmail.com> + * + * 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/prefs.h> +#include <epan/expert.h> + +void proto_register_forces(void); +void proto_reg_handoff_forces(void); + +static dissector_handle_t forces_handle_tcp, forces_handle; + +static dissector_handle_t ip_handle; + +/* Initialize the ForCES protocol and registered fields */ +static int proto_forces = -1; + +/*Main header*/ +static int hf_forces_version = -1; +static int hf_forces_rsvd = -1; +static int hf_forces_messagetype = -1; +static int hf_forces_sid = -1; +static int hf_forces_did = -1; +static int hf_forces_correlator = -1; +static int hf_forces_length = -1; +/*Flags*/ +static int hf_forces_flags= -1; +static int hf_forces_flags_ack= -1; +static int hf_forces_flags_pri= -1; +static int hf_forces_flags_rsrvd= -1; +static int hf_forces_flags_em= -1; +static int hf_forces_flags_at= -1; +static int hf_forces_flags_tp= -1; +static int hf_forces_flags_reserved = -1; + +static int hf_forces_tlv_type = -1; +static int hf_forces_tlv_length = -1; + +/*Initiation of LFBSelect TLV*/ +static int hf_forces_lfbselect_tlv_type_lfb_classid = -1; +static int hf_forces_lfbselect_tlv_type_lfb_instanceid = -1; + +/*Initiation of Operation TLV*/ +static int hf_forces_lfbselect_tlv_type_operation_type = -1; +static int hf_forces_lfbselect_tlv_type_operation_length = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_type = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_length = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_flags = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_flags_selector = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_flags_reserved = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_IDcount = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_IDs = -1; +static int hf_forces_lfbselect_tlv_type_operation_path_data = -1; + +/*Initiation of Redirect TLV*/ +static int hf_forces_redirect_tlv_meta_data_tlv_type = -1; +static int hf_forces_redirect_tlv_meta_data_tlv_length = -1; +static int hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv = -1; +static int hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_id = -1; +static int hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_length = -1; +static int hf_forces_redirect_tlv_redirect_data_tlv_type = -1; +static int hf_forces_redirect_tlv_redirect_data_tlv_length = -1; + +/*Initiation of ASResult TLV*/ +static int hf_forces_asresult_association_setup_result = -1; + +/*Initiation of ASTreason TLV*/ +static int hf_forces_astreason_tlv_teardown_reason = -1; + +/*Main TLV may be unknown*/ +static int hf_forces_unknown_tlv = -1; + +/*Message Types */ +#define AssociationSetup 0x01 +#define AssociationTeardown 0x02 +#define Config 0x03 +#define Query 0x04 +#define EventNotification 0x05 +#define PacketRedirect 0x06 +#define Heartbeat 0x0F +#define AssociationSetupResponse 0x11 +#define ConfigResponse 0x13 +#define QueryResponse 0x14 + +/*TLV Types*/ +#define Reserved 0x0000 +#define REDIRECT_TLV 0x0001 +#define ASResult_TLV 0x0010 +#define ASTreason_TLV 0x0011 +#define LFBselect_TLV 0x1000 +#define PATH_DATA_TLV 0x0110 +#define KEYINFO_TLV 0x0111 +#define FULLDATA_TLV 0x0112 +#define SPARSEDATA_TLV 0x0113 +#define RESULT_TLV 0x0114 +#define METADATA_TLV 0x0115 +#define REDIRECTDATA_TLV 0x0116 + +/*Operation Type*/ +#define Reserved 0x0000 +#define SET 0x0001 +#define SET_PROP 0x0002 +#define SET_RESPONSE 0x0003 +#define SET_PROP_RESPONSE 0x0004 +#define DEL 0x0005 +#define DEL_RESPONSE 0x0006 +#define GET 0x0007 +#define GET_PROP 0x0008 +#define GET_RESPONSE 0x0009 +#define GET_PROP_RESPONSE 0x000A +#define REPORT 0x000B +#define COMMIT 0x000C +#define COMMIT_RESPONSE 0x000D +#define TRCOMP 0x000E + +#define FLAG_SELECTOR 0x8000 + +#define ForCES_HEADER_LENGTH 24 +#define TLV_TL_LENGTH 4 /*Type+length*/ +#define MIN_IP_HEADER_LENGTH 20 + +/*For TCP+UDP TML. There are two bytes added to the ForCES PL message, not strictly combine to the ForCES protocol. + For other type TMLs,no need to add these 2 bytes.*/ +#define TCP_UDP_TML_FOCES_MESSAGE_OFFSET_TCP 2 + +/*SCTP TML*/ +static guint forces_alternate_sctp_high_prio_channel_port = 0; +static guint forces_alternate_sctp_med_prio_channel_port = 0; +static guint forces_alternate_sctp_low_prio_channel_port = 0; + +/*Initialize the subtree pointers*/ +static gint ett_forces = -1; +static gint ett_forces_main_header = -1; +static gint ett_forces_flags = -1; +static gint ett_forces_tlv = -1; +static gint ett_forces_lfbselect_tlv_type = -1; + +/*Operation TLV subtree*/ +static gint ett_forces_lfbselect_tlv_type_operation = -1; +static gint ett_forces_lfbselect_tlv_type_operation_path = -1; +static gint ett_forces_lfbselect_tlv_type_operation_path_data = -1; +static gint ett_forces_lfbselect_tlv_type_operation_path_data_path = -1; +static gint ett_forces_path_data_tlv = -1; +static gint ett_forces_path_data_tlv_flags = -1; + +/*Selector subtree*/ +static gint ett_forces_lfbselect_tlv_type_operation_path_selector = -1; + +/*Redirect TLV subtree*/ +static gint ett_forces_redirect_tlv_type = -1; +static gint ett_forces_redirect_tlv_meta_data_tlv = -1; +static gint ett_forces_redirect_tlv_meta_data_tlv_meta_data_ilv = -1; +static gint ett_forces_redirect_tlv_redirect_data_tlv = -1; + +/*ASResult TLV subtree*/ +static gint ett_forces_asresult_tlv = -1; + +/*ASReason subtree*/ +static gint ett_forces_astreason_tlv = -1; + +/*Main_TLV unknown subtree*/ +static gint ett_forces_unknown_tlv = -1; + + +static expert_field ei_forces_length = EI_INIT; +static expert_field ei_forces_tlv_type = EI_INIT; +static expert_field ei_forces_tlv_length = EI_INIT; +static expert_field ei_forces_lfbselect_tlv_type_operation_path_length = EI_INIT; +static expert_field ei_forces_lfbselect_tlv_type_operation_type = EI_INIT; +static expert_field ei_forces_redirect_tlv_redirect_data_tlv_length = EI_INIT; + +/*ACK values and the strings to be displayed*/ +static const value_string main_header_flags_ack_vals[] = { + { 0x0, "NoACK" }, + { 0x1, "SuccessACK" }, + { 0x2, "FailureACK" }, + { 0x3, "AlwaysACK" }, + { 0, NULL} +}; + +/*Execution mode(EM) values and the strings to be displayed*/ +static const value_string main_header_flags_em_vals[] = { + { 0x0, "Reserved" }, + { 0x1, "Execute-all-or-none" }, + { 0x2, "Execute-until-failure" }, + { 0x3, "Continue-execute-on-failure" }, + { 0, NULL} +}; + +/*Transaction Phase values and the strings to be displayed*/ +static const value_string main_header_flags_tp_vals[] = { + { 0x0, "SOT (Start of Transaction)" }, + { 0x1, "MOT (Middle of Transaction)" }, + { 0x2, "EOT (End of Transaction)" }, + { 0x3, "ABT (Abort)" }, + { 0, NULL} +}; + +/*Atomic Transaction(AT) values and the strings to be displayed*/ +static const value_string main_header_flags_at_vals[] = { + { 0x0, "Stand-alone Message"}, + { 0x1, "2PC Transaction Message"}, + { 0, NULL} +}; + +/*Association Setup Result*/ +static const value_string association_setup_result_at_vals[] = { + { 0x0, "success"}, + { 0x1, "FE ID invalid"}, + { 0x2, "permission denied"}, + { 0, NULL}, +}; + +/*Teardown Reason*/ +static const value_string teardown_reason_at_vals[] = { + { 0x0, "normal-teardown by administrator"}, + { 0x1, "error - loss of heartbeats"}, + { 0x2, "error - out of bandwidth"}, + { 0x3, "error - out of memory"}, + { 0x4, "error - application crash"}, + { 0x255, "error - other or unspecified"}, + { 0, NULL}, +}; + +static const value_string message_type_vals[] = { + { AssociationSetup, "AssociationSetup" }, + { AssociationTeardown, "AssociationTeardown" }, + { Config, "Config" }, + { Query, "Query" }, + { EventNotification, "EventNotification" }, + { PacketRedirect, "PacketRedirect" }, + { Heartbeat, "Heartbeat" }, + { AssociationSetupResponse, "AssociationSetupResponse" }, + { ConfigResponse, "ConfigResponse" }, + { QueryResponse, "QueryResponse" }, + { 0, NULL}, +}; + +static const value_string tlv_type_vals[] = { + { REDIRECT_TLV, "REDIRECT-TLV" }, + { ASResult_TLV, "ASResult-TLV" }, + { ASTreason_TLV, "ASTreason-TLV" }, + { LFBselect_TLV, "LFBselect-TLV" }, + { PATH_DATA_TLV, "PATH DATA-TLV" }, + { KEYINFO_TLV, "KEYINFO-TLV" }, + { FULLDATA_TLV, "FULLDATA-TLV" }, + { SPARSEDATA_TLV, "SPARSEDATA-TLV" }, + { RESULT_TLV, "RESULT-TLV" }, + { METADATA_TLV, "METADATA-TLV" }, + { REDIRECTDATA_TLV, "REDIRECTDATA-TLV" }, + { 0, NULL}, +}; + +static const value_string operation_type_vals[] = { + { Reserved, "Reserved" }, + { SET, "SET" }, + { SET_PROP, "SET-PROP" }, + { SET_RESPONSE, "SET-RESPONSE" }, + { SET_PROP_RESPONSE, "SET-PROP-RESPONSE" }, + { DEL, "DEL" }, + { DEL_RESPONSE, "DEL-RESPONSE" }, + { GET, "GET" }, + { GET_PROP, "GET-PROP" }, + { GET_RESPONSE, "GET-RESPONSE" }, + { GET_PROP_RESPONSE, "GET-PROP-RESPONSE" }, + { REPORT, "REPORT" }, + { COMMIT, "COMMIT" }, + { COMMIT_RESPONSE, "COMMIT-RESPONSE" }, + { TRCOMP, "TRCOMP" }, + { 0, NULL}, +}; + +static void +dissect_path_data_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset) +{ + proto_item *ti, *flag_item; + guint length_TLV, IDcount, i; + guint16 type, flag; + proto_tree *tlv_tree, *path_data_tree, *flag_tree; + + while (tvb_reported_length_remaining(tvb, offset) >= TLV_TL_LENGTH) + { + tlv_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH, ett_forces_path_data_tlv, &ti, "TLV"); + + type = tvb_get_ntohs(tvb, offset); + proto_tree_add_item(tlv_tree, hf_forces_lfbselect_tlv_type_operation_path_type, + tvb, offset, 2, ENC_BIG_ENDIAN); + length_TLV = tvb_get_ntohs(tvb, offset+2); + proto_tree_add_item(tlv_tree, hf_forces_lfbselect_tlv_type_operation_path_length, + tvb, offset+2, 2, ENC_BIG_ENDIAN); + if (length_TLV < TLV_TL_LENGTH) + { + expert_add_info_format(pinfo, ti, &ei_forces_lfbselect_tlv_type_operation_path_length, "Bogus TLV length: %u", length_TLV); + break; + } + proto_item_set_len(ti, length_TLV); + + if (type == PATH_DATA_TLV) + { + path_data_tree = proto_tree_add_subtree(tree, tvb, offset+TLV_TL_LENGTH, length_TLV-TLV_TL_LENGTH, + ett_forces_path_data_tlv, NULL, "Path Data TLV"); + + flag = tvb_get_ntohs(tvb, offset+TLV_TL_LENGTH); + flag_item = proto_tree_add_item(path_data_tree, hf_forces_lfbselect_tlv_type_operation_path_flags, + tvb, offset+TLV_TL_LENGTH, 2, ENC_BIG_ENDIAN); + flag_tree = proto_item_add_subtree(flag_item, ett_forces_path_data_tlv_flags); + proto_tree_add_item(flag_tree, hf_forces_lfbselect_tlv_type_operation_path_flags_selector, + tvb, offset+TLV_TL_LENGTH, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(flag_tree, hf_forces_lfbselect_tlv_type_operation_path_flags_reserved, + tvb, offset+TLV_TL_LENGTH, 2, ENC_BIG_ENDIAN); + + IDcount = tvb_get_ntohs(tvb, offset + TLV_TL_LENGTH + 2); + proto_tree_add_item(path_data_tree, hf_forces_lfbselect_tlv_type_operation_path_IDcount, + tvb, offset+TLV_TL_LENGTH+2, 2, ENC_BIG_ENDIAN); + + for (i = 0; i < IDcount; i++) + proto_tree_add_item(path_data_tree, hf_forces_lfbselect_tlv_type_operation_path_IDs, + tvb, offset+TLV_TL_LENGTH+2+(i*4), 4, ENC_BIG_ENDIAN); + } + else + { + flag = 0; + proto_tree_add_item(tree, hf_forces_lfbselect_tlv_type_operation_path_data, + tvb, offset+TLV_TL_LENGTH, length_TLV-TLV_TL_LENGTH, ENC_NA); + } + + if ((flag & FLAG_SELECTOR) == 0) + break; + + offset += length_TLV; + } +} + +static void +dissect_operation_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset, gint length_count) +{ + proto_item *ti; + proto_tree *oper_tree; + guint type, length; + + while (tvb_reported_length_remaining(tvb, offset) >= TLV_TL_LENGTH) + { + oper_tree = proto_tree_add_subtree(tree, tvb, offset, length_count, + ett_forces_lfbselect_tlv_type_operation, &ti, "Operation TLV"); + + type = tvb_get_ntohs(tvb,offset); + ti = proto_tree_add_item(oper_tree, hf_forces_lfbselect_tlv_type_operation_type, + tvb, offset, 2, ENC_BIG_ENDIAN); + if (try_val_to_str(type, operation_type_vals) == NULL) + expert_add_info_format(pinfo, ti, &ei_forces_lfbselect_tlv_type_operation_type, + "Bogus: ForCES Operation TLV (Type:0x%04x) is not supported", type); + + proto_tree_add_item_ret_uint(oper_tree, hf_forces_lfbselect_tlv_type_operation_length, + tvb, offset+2, 2, ENC_BIG_ENDIAN, &length); + + dissect_path_data_tlv(tvb, pinfo, oper_tree, offset+TLV_TL_LENGTH); + if (length == 0) + break; + offset += length; + } +} + +static void +dissect_lfbselecttlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset, gint length_count) +{ + guint tlv_length; + + proto_tree_add_item(tree, hf_forces_lfbselect_tlv_type_lfb_classid, tvb, offset, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(tree, hf_forces_lfbselect_tlv_type_lfb_instanceid, tvb, offset+4, 4, ENC_BIG_ENDIAN); + + offset += 8; + while ((tvb_reported_length_remaining(tvb, offset) > TLV_TL_LENGTH) && (length_count > 12)) + { + tlv_length = tvb_get_ntohs(tvb, offset+2); + dissect_operation_tlv(tvb, pinfo, tree, offset, tlv_length); + if (tlv_length == 0) + break; + offset += tlv_length; + } +} + +static void +dissect_redirecttlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset) +{ + proto_tree *meta_data_tree, *meta_data_ilv_tree, *redirect_data_tree; + gint start_offset; + gint length_meta, length_ilv, length_redirect; + proto_item *ti; + address src_addr, src_net_addr; + address dst_addr, dst_net_addr; + + copy_address_shallow(&src_addr, &pinfo->src); + copy_address_shallow(&src_net_addr, &pinfo->net_src); + copy_address_shallow(&dst_addr, &pinfo->dst); + copy_address_shallow(&dst_net_addr, &pinfo->net_dst); + + meta_data_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH, + ett_forces_redirect_tlv_meta_data_tlv, &ti, "Meta Data TLV"); + proto_tree_add_item(meta_data_tree, hf_forces_redirect_tlv_meta_data_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN); + + length_meta = tvb_get_ntohs(tvb, offset+2); + proto_tree_add_uint(meta_data_tree, hf_forces_redirect_tlv_meta_data_tlv_length, tvb, offset+2, 2, length_meta); + proto_item_set_len(ti, length_meta); + + start_offset = offset; + while ((tvb_reported_length_remaining(tvb, offset) >= 8) && (start_offset+length_meta > offset)) + { + meta_data_ilv_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH, + ett_forces_redirect_tlv_meta_data_tlv_meta_data_ilv, &ti, "Meta Data ILV"); + + proto_tree_add_item(meta_data_ilv_tree, hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_id, + tvb, offset+8, 4, ENC_BIG_ENDIAN); + length_ilv = tvb_get_ntohl(tvb, offset+12); + proto_tree_add_uint(meta_data_ilv_tree, hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_length, + tvb, offset+12, 4, length_ilv); + offset += 8; + if (length_ilv > 0) { + proto_tree_add_item(meta_data_ilv_tree, hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv, + tvb, offset, length_ilv, ENC_NA); + + if (offset + length_ilv > offset) { + offset += length_ilv; + } + } + + proto_item_set_len(ti, length_ilv + 8); + } + + if (tvb_reported_length_remaining(tvb, offset) > 0) + { + redirect_data_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH, + ett_forces_redirect_tlv_redirect_data_tlv, &ti, "Redirect Data TLV"); + + proto_tree_add_item(redirect_data_tree, hf_forces_redirect_tlv_redirect_data_tlv_type, + tvb, offset, 2, ENC_BIG_ENDIAN); + length_redirect = tvb_get_ntohs(tvb, offset+2); + proto_tree_add_uint(redirect_data_tree, hf_forces_redirect_tlv_redirect_data_tlv_length, + tvb, offset+2, 2, length_redirect); + + if (tvb_reported_length_remaining(tvb, offset) < length_redirect) + { + expert_add_info_format(pinfo, ti, &ei_forces_redirect_tlv_redirect_data_tlv_length, "Bogus: Redirect Data TLV length (%u bytes) is wrong", length_redirect); + } + else if (length_redirect < TLV_TL_LENGTH + MIN_IP_HEADER_LENGTH) + { + expert_add_info_format(pinfo, ti, &ei_forces_redirect_tlv_redirect_data_tlv_length, "Bogus: Redirect Data TLV length (%u bytes) not big enough for IP layer", length_redirect); + } + else + { + tvbuff_t *next_tvb; + + next_tvb = tvb_new_subset_length(tvb, offset+4, length_redirect-TLV_TL_LENGTH); + call_dissector(ip_handle, next_tvb, pinfo, redirect_data_tree); + + /* Restore IP info */ + copy_address_shallow(&pinfo->src, &src_addr); + copy_address_shallow(&pinfo->net_src, &src_net_addr); + copy_address_shallow(&pinfo->dst, &dst_addr); + copy_address_shallow(&pinfo->net_dst, &dst_net_addr); + } + } +} + +static void +dissect_forces(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset) +{ + /* Set up structures needed to add the protocol subtree and manage it */ + proto_item *ti, *tlv_item; + proto_tree *forces_tree, *forces_flags_tree; + proto_tree *forces_main_header_tree, *forces_tlv_tree, *tlv_tree; + gint length_count; + + guint8 message_type; + guint16 tlv_type; + + /* Make entries in Protocol column and Info column on summary display */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "ForCES"); + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_forces, tvb, 0, -1, ENC_NA); + forces_tree = proto_item_add_subtree(ti, ett_forces); + + forces_main_header_tree = proto_tree_add_subtree(forces_tree, tvb, 0, ForCES_HEADER_LENGTH, + ett_forces_main_header, NULL, "Common Header"); + + proto_tree_add_item(forces_main_header_tree, hf_forces_version, tvb, 0, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_main_header_tree, hf_forces_rsvd, tvb, 0, 1, ENC_BIG_ENDIAN); + + message_type = tvb_get_guint8(tvb, offset+1); + proto_tree_add_item( forces_main_header_tree, hf_forces_messagetype, tvb, offset+1, 1, ENC_BIG_ENDIAN); + + length_count = tvb_get_ntohs(tvb, offset+2) * 4; /*multiply 4 DWORD*/ + ti = proto_tree_add_uint_format( forces_main_header_tree, hf_forces_length, + tvb, offset+2, 2, length_count, "Length: %u Bytes", length_count); + if (length_count != tvb_reported_length_remaining(tvb, offset)) + expert_add_info_format(pinfo, ti, &ei_forces_length, "Bogus: ForCES Header length (%u bytes) is wrong),should be (%u bytes)", + length_count, tvb_reported_length_remaining(tvb, offset)); + if (length_count < 24) + expert_add_info_format(pinfo, ti, &ei_forces_length, "Bogus: ForCES Header length (%u bytes) is less than 24bytes)", length_count); + + col_add_fstr(pinfo->cinfo, COL_INFO, "Message Type: %s, Total Length: %u Bytes", + val_to_str(message_type, message_type_vals, "Unknown messagetype 0x%x"), length_count); + + proto_tree_add_item( forces_main_header_tree, hf_forces_sid, tvb, offset+4, 4, ENC_BIG_ENDIAN); + proto_tree_add_item( forces_main_header_tree, hf_forces_did, tvb, offset+8, 4, ENC_BIG_ENDIAN); + proto_tree_add_item( forces_main_header_tree, hf_forces_correlator, tvb, offset+12, 8, ENC_BIG_ENDIAN); + + /*Add flags tree*/ + ti = proto_tree_add_item(forces_main_header_tree, hf_forces_flags, tvb, offset+20, 4, ENC_BIG_ENDIAN); + forces_flags_tree = proto_item_add_subtree(ti, ett_forces_flags); + + proto_tree_add_item(forces_flags_tree, hf_forces_flags_ack, tvb, offset+20, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_flags_tree, hf_forces_flags_at, tvb, offset+20, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_flags_tree, hf_forces_flags_em, tvb, offset+20, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_flags_tree, hf_forces_flags_pri, tvb, offset+20, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_flags_tree, hf_forces_flags_reserved, tvb, offset+20, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_flags_tree, hf_forces_flags_rsrvd, tvb, offset+20, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(forces_flags_tree, hf_forces_flags_tp, tvb, offset+20, 4, ENC_BIG_ENDIAN); + + offset += 24; + while (tvb_reported_length_remaining(tvb, offset) >= TLV_TL_LENGTH) + { + forces_tlv_tree = proto_tree_add_subtree(forces_tree, tvb, offset, TLV_TL_LENGTH, ett_forces_tlv, &ti, "TLV"); + + tlv_type = tvb_get_ntohs(tvb, offset); + tlv_item = proto_tree_add_item(forces_tlv_tree, hf_forces_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN); + length_count = tvb_get_ntohs(tvb, offset+2) * 4; + proto_item_set_len(ti, length_count); + ti = proto_tree_add_uint(forces_tlv_tree, hf_forces_tlv_length, + tvb, offset+2, 2, length_count); + if (tvb_reported_length_remaining(tvb, offset) < length_count) + expert_add_info_format(pinfo, ti, &ei_forces_tlv_length, "Bogus: Main TLV length (%u bytes) is wrong", length_count); + + if (length_count < TLV_TL_LENGTH) + { + expert_add_info_format(pinfo, ti, &ei_forces_tlv_length, "Bogus TLV length: %u", length_count); + break; + } + + offset += TLV_TL_LENGTH; + length_count -= TLV_TL_LENGTH; + + switch(tlv_type) + { + case LFBselect_TLV: + tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count, + ett_forces_lfbselect_tlv_type, NULL, "LFB select TLV"); + dissect_lfbselecttlv(tvb, pinfo, tlv_tree, offset, length_count); + break; + + case REDIRECT_TLV: + tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count, + ett_forces_redirect_tlv_type, NULL, "Redirect TLV"); + dissect_redirecttlv(tvb, pinfo, tlv_tree, offset); + break; + + case ASResult_TLV: + tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count, + ett_forces_asresult_tlv, NULL, "ASResult TLV"); + proto_tree_add_item(tlv_tree, hf_forces_asresult_association_setup_result, tvb, offset, 4, ENC_BIG_ENDIAN); + break; + + case ASTreason_TLV: + tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count, + ett_forces_astreason_tlv, NULL, "ASTreason TLV"); + proto_tree_add_item(tlv_tree, hf_forces_astreason_tlv_teardown_reason, tvb, offset, 4, ENC_BIG_ENDIAN); + break; + + default: + expert_add_info(pinfo, tlv_item, &ei_forces_tlv_type); + tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count, + ett_forces_unknown_tlv, NULL, "Unknown TLV"); + proto_tree_add_item(tlv_tree, hf_forces_unknown_tlv, tvb, offset, length_count, ENC_NA); + break; + } + + offset += length_count; + } +} + +/* Code to actually dissect the TCP packets */ +static int +dissect_forces_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + dissect_forces(tvb, pinfo, tree, TCP_UDP_TML_FOCES_MESSAGE_OFFSET_TCP); + return tvb_captured_length(tvb); +} + +/* Code to actually dissect the ForCES protocol layer packets,like UDP,SCTP and others */ +static int +dissect_forces_not_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + dissect_forces(tvb, pinfo, tree, 0); + return tvb_captured_length(tvb); +} + +void +proto_register_forces(void) +{ + module_t *forces_module; + expert_module_t* expert_forces; + + /* Setup list of header fields See Section 1.6.1 for details*/ + static hf_register_info hf[] = { + { &hf_forces_version, + { "Version", "forces.flags.version", + FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL } + }, + { &hf_forces_rsvd, + { "Rsvd", "forces.flags.rsvd", + FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL } + }, + { &hf_forces_messagetype, + { "Message Type", "forces.messagetype", + FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_length, + { "Header Length", "forces.length", + FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_sid, + { "Source ID", "forces.sid", + FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_did, + { "Destination ID", "forces.did", + FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_correlator, + { "Correlator", "forces.correlator", + FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_tlv_type, + { "Type", "forces.tlv.type", + FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_tlv_length, + { "Length", "forces.tlv.length", + FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_byte_bytes, 0x0, NULL, HFILL } + }, + /*flags*/ + { &hf_forces_flags, + { "Flags", "forces.Flags", + FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_flags_ack, + { "ACK indicator", "forces.flags.ack", + FT_UINT32, BASE_DEC, VALS(main_header_flags_ack_vals), 0xC0000000, NULL, HFILL } + }, + { &hf_forces_flags_pri, + { "Priority", "forces.flags.pri", + FT_UINT32, BASE_DEC, NULL, 0x38000000, NULL, HFILL } + }, + { &hf_forces_flags_rsrvd, + { "Rsrvd", "forces.Flags", + FT_UINT32, BASE_DEC,NULL, 0x07000000, NULL, HFILL } + }, + { &hf_forces_flags_em, + { "Execution mode", "forces.flags.em", + FT_UINT32, BASE_DEC, VALS(main_header_flags_em_vals), 0x00C00000, NULL, HFILL } + }, + { &hf_forces_flags_at, + { "Atomic Transaction", "forces.flags.at", + FT_UINT32, BASE_DEC, VALS(main_header_flags_at_vals), 0x00200000, NULL, HFILL } + }, + { &hf_forces_flags_tp, + { "Transaction phase", "forces.flags.tp", + FT_UINT32, BASE_DEC, VALS(main_header_flags_tp_vals), 0x00180000, NULL, HFILL } + }, + { &hf_forces_flags_reserved, + { "Reserved", "forces.flags.reserved", + FT_UINT32, BASE_DEC,NULL, 0x0007ffff, NULL, HFILL } + }, + /*LFBSelectTLV*/ + { &hf_forces_lfbselect_tlv_type_lfb_classid, + { "Class ID", "forces.lfbselect.tlv.type.lfb.classid", + FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_lfb_instanceid, + { "Instance ID", "forces.fbselect.tlv.type.lfb.instanceid", + FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + /*Operation TLV*/ + { &hf_forces_lfbselect_tlv_type_operation_type, + { "Type", "forces.lfbselect.tlv.type.operation.type", + FT_UINT16, BASE_DEC, VALS(operation_type_vals), 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_length, + { "Length", "forces.lfbselect.tlv.type.operation.length", + FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_byte_bytes, 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_type, + { "Type", "forces.lfbselect.tlv.type.operation.path.type", + FT_UINT16, BASE_DEC, VALS(tlv_type_vals), 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_length, + { "Length", "forces.lfbselect.tlv.type.operation.path.length", + FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_data, + { "Data", "forces.lfbselect.tlv.type.operation.path.data", + FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_flags, + {"Path Data Flags", "forces.lfbselect.tlv.type.operation.path.data.flags", + FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_flags_selector, + {"Selector", "forces.lfbselect.tlv.type.operation.path.data.flags.selector", + FT_UINT16, BASE_HEX, NULL, 0x80, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_flags_reserved, + {"Reserved", "forces.lfbselect.tlv.type.operation.path.data.flags.reserved", + FT_UINT16, BASE_HEX, NULL, 0x7F, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_IDcount, + { "Path Data IDcount", "forces.lfbselect.tlv.type.operation.path.data.IDcount", + FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_lfbselect_tlv_type_operation_path_IDs, + { "Path Data IDs", "forces.lfbselect.tlv.type.operation.path.data.IDs", + FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + /*Meta data TLV*/ + {&hf_forces_redirect_tlv_meta_data_tlv_type, + { "Type", "forces.redirect.tlv.meta.data.tlv.type", + FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_redirect_tlv_meta_data_tlv_length, + { "Length", "forces.redirect.tlv.meta.data.tlv.length", + FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_byte_bytes, 0x0, NULL, HFILL } + }, + { &hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv, + { "Meta Data ILV", "forces.redirect.tlv.meta.data.tlv.meta.data.ilv", + FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_id, + { "ID", "forces.redirect.tlv.meta.data.tlv.meta.data.ilv.id", + FT_UINT32, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_length, + { "Length", "forces.redirect.tlv.meta.data.tlv.meta.data.ilv.length", + FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_byte_bytes, 0x0, NULL, HFILL } + }, + { &hf_forces_redirect_tlv_redirect_data_tlv_type, + { "Type", "forces.redirect.tlv.redirect.data.tlv.type", + FT_UINT16, BASE_DEC, VALS(tlv_type_vals), 0x0, NULL, HFILL } + }, + { &hf_forces_redirect_tlv_redirect_data_tlv_length, + { "Length", "forces.redirect.tlv.redirect.data.tlv.length", + FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_byte_bytes, 0x0, NULL, HFILL } + }, + { &hf_forces_asresult_association_setup_result, + { "Association Setup Result", "forces.teardown.reason", + FT_UINT32, BASE_DEC, VALS(association_setup_result_at_vals), 0x0, NULL, HFILL } + }, + { &hf_forces_astreason_tlv_teardown_reason, + { "AStreason TLV TearDown Reason", "forces.astreason.tlv.teardown.reason", + FT_UINT32, BASE_DEC, VALS(teardown_reason_at_vals), 0x0, NULL, HFILL } + }, + { &hf_forces_unknown_tlv, + { "Data", "forces.unknown.tlv", + FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } + } + }; + + /* Setup protocol subtree array */ + static gint *ett[] = { + &ett_forces, + &ett_forces_main_header, + &ett_forces_flags, + &ett_forces_tlv, + &ett_forces_lfbselect_tlv_type, + &ett_forces_lfbselect_tlv_type_operation, + &ett_forces_lfbselect_tlv_type_operation_path, + &ett_forces_lfbselect_tlv_type_operation_path_data, + &ett_forces_lfbselect_tlv_type_operation_path_data_path, + &ett_forces_lfbselect_tlv_type_operation_path_selector, + &ett_forces_path_data_tlv, + &ett_forces_path_data_tlv_flags, + &ett_forces_redirect_tlv_type, + &ett_forces_redirect_tlv_meta_data_tlv, + &ett_forces_redirect_tlv_redirect_data_tlv, + &ett_forces_redirect_tlv_meta_data_tlv_meta_data_ilv, + &ett_forces_asresult_tlv, + &ett_forces_astreason_tlv, + &ett_forces_unknown_tlv + }; + + static ei_register_info ei[] = { + { &ei_forces_length, { "forces.length.bad", PI_PROTOCOL, PI_WARN, "ForCES Header length is wrong", EXPFILL }}, + { &ei_forces_tlv_type, { "forces.tlv.type.unknown", PI_PROTOCOL, PI_WARN, "Bogus: The Main_TLV type is unknown", EXPFILL }}, + { &ei_forces_tlv_length, { "forces.tlv.length.bad", PI_PROTOCOL, PI_WARN, "Bogus TLV length", EXPFILL }}, + { &ei_forces_lfbselect_tlv_type_operation_path_length, { "forces.lfbselect.tlv.type.operation.path.length.bad", PI_PROTOCOL, PI_WARN, "Bogus TLV length", EXPFILL }}, + { &ei_forces_lfbselect_tlv_type_operation_type, { "forces.lfbselect.tlv.type.operation.type.unsupported", PI_PROTOCOL, PI_WARN, "ForCES Operation TLV is not supported", EXPFILL }}, + { &ei_forces_redirect_tlv_redirect_data_tlv_length, { "forces.redirect.tlv.redirect.data.tlv.length.bad", PI_PROTOCOL, PI_WARN, "Redirect Data TLV length is wrong", EXPFILL }}, + }; + + /* Register the protocol name and description */ + proto_forces = proto_register_protocol("Forwarding and Control Element Separation Protocol", "ForCES", "forces"); + + /* Required function calls to register the header fields and subtrees used */ + proto_register_field_array(proto_forces, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + expert_forces = expert_register_protocol(proto_forces); + expert_register_field_array(expert_forces, ei, array_length(ei)); + + forces_handle_tcp = register_dissector("forces.tcp", dissect_forces_tcp, proto_forces); + forces_handle = register_dissector("forces", dissect_forces_not_tcp, proto_forces); + + forces_module = prefs_register_protocol(proto_forces,proto_reg_handoff_forces); + + prefs_register_uint_preference(forces_module, "sctp_high_prio_port", + "SCTP High Priority channel port", + "Decode packets on this sctp port as ForCES", + 10, &forces_alternate_sctp_high_prio_channel_port); + + prefs_register_uint_preference(forces_module, "sctp_med_prio_port", + "SCTP Medium Priority channel port", + "Decode packets on this sctp port as ForCES", + 10, &forces_alternate_sctp_med_prio_channel_port); + + prefs_register_uint_preference(forces_module, "sctp_low_prio_port", + "SCTP Low Priority channel port", + "Decode packets on this sctp port as ForCES", + 10, &forces_alternate_sctp_low_prio_channel_port); +} + +void +proto_reg_handoff_forces(void) +{ + static gboolean inited = FALSE; + + static guint alternate_sctp_high_prio_channel_port = 0; /* 6700 */ + static guint alternate_sctp_med_prio_channel_port = 0; + static guint alternate_sctp_low_prio_channel_port = 0; + + if (!inited) { + ip_handle = find_dissector_add_dependency("ip", proto_forces); + /* Register TCP port for dissection */ + dissector_add_for_decode_as_with_preference("tcp.port", forces_handle_tcp); + /* Register UDP port for dissection */ + dissector_add_for_decode_as_with_preference("udp.port", forces_handle); + + inited = TRUE; + } + + /* Register SCTP port for high priority dissection */ + if ((alternate_sctp_high_prio_channel_port != 0) && + (alternate_sctp_high_prio_channel_port != forces_alternate_sctp_high_prio_channel_port)) + dissector_delete_uint("sctp.port", alternate_sctp_high_prio_channel_port, forces_handle); + if ((forces_alternate_sctp_high_prio_channel_port != 0) && + (alternate_sctp_high_prio_channel_port != forces_alternate_sctp_high_prio_channel_port)) + dissector_add_uint("sctp.port", forces_alternate_sctp_high_prio_channel_port, forces_handle); + alternate_sctp_high_prio_channel_port = forces_alternate_sctp_high_prio_channel_port; + + /* Register SCTP port for medium priority dissection */ + if ((alternate_sctp_med_prio_channel_port != 0) && + (alternate_sctp_med_prio_channel_port != forces_alternate_sctp_med_prio_channel_port)) + dissector_delete_uint("sctp.port", alternate_sctp_med_prio_channel_port, forces_handle); + if ((forces_alternate_sctp_med_prio_channel_port != 0) && + (alternate_sctp_med_prio_channel_port != forces_alternate_sctp_med_prio_channel_port)) + dissector_add_uint("sctp.port", forces_alternate_sctp_med_prio_channel_port, forces_handle); + alternate_sctp_med_prio_channel_port = forces_alternate_sctp_med_prio_channel_port; + + /* Register SCTP port for low priority dissection */ + if ((alternate_sctp_low_prio_channel_port != 0) && + (alternate_sctp_low_prio_channel_port != forces_alternate_sctp_low_prio_channel_port)) + dissector_delete_uint("sctp.port", alternate_sctp_low_prio_channel_port, forces_handle); + if ((forces_alternate_sctp_low_prio_channel_port != 0) && + (alternate_sctp_low_prio_channel_port != forces_alternate_sctp_low_prio_channel_port)) + dissector_add_uint("sctp.port", forces_alternate_sctp_low_prio_channel_port, forces_handle); + alternate_sctp_low_prio_channel_port = forces_alternate_sctp_low_prio_channel_port; +} + +/* +* Editor modelines - https://www.wireshark.org/tools/modelines.html +* +* Local variables: +* c-basic-offset: 4 +* tab-width: 8 +* indent-tabs-mode: nil +* End: +* +* vi: set shiftwidth=4 tabstop=8 expandtab: +* :indentSize=4:tabSize=8:noTabs=true: +*/ |