/* packet-ancp.c * * Dissector for ANCP - Access Node Control Protocol * * More info on the protocol can be found on IETF: * https://tools.ietf.org/wg/ancp/ * https://tools.ietf.org/html/draft-ietf-ancp-protocol-09 * https://tools.ietf.org/html/rfc6320 * https://www.iana.org/assignments/ancp/ancp.xhtml * * Copyright 2010, Aniruddha.A (anira@cisco.com) * Uli Heilmeier, 2017; Update to RFC6320; current IANA registry types * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include "packet-tcp.h" #define ANCP_PORT 6068 /* The ANCP TCP port:draft-ietf-ancp-protocol-09.txt */ #define ANCP_MIN_HDR 4 #define ANCP_GSMP_ETHER_TYPE 0x880C #define TECH_TYPE_DSL 0x5 #define TECH_TYPE_PON 0x1 #define ANCP_RESULT_MASK 0xF0 #define ANCP_CODE_MASK 0x0FFF #define ANCP_I_FLAG_MASK 0x80 #define ANCP_SUBMSG_MASK 0x7FFF #define ADJ_CODE_MASK 0x7F /* excluding MSB M-Flag */ #define ANCP_MTYPE_ADJ 10 #define ANCP_MTYPE_PORT_MGMT 32 #define ANCP_MTYPE_PORT_UP 80 #define ANCP_MTYPE_PORT_DN 81 #define ANCP_MTYPE_ADJ_UPD 85 #define ANCP_MTYPE_GEN_RSP 91 #define ANCP_MTYPE_PROV 93 /* Topology Discovery Extensions */ #define TLV_DSL_LINE_ATTRIBUTES 0x04 #define TLV_DSL_LINE_STATE 0x8F #define TLV_DSL_TYPE 0x91 /* Port Management Extensions */ #define TLV_PING_PARAMS 0x07 #define TLV_PING_OPAQUE_DATA 0x08 #define TLV_PING_RES_STR 0x09 void proto_register_ancp(void); void proto_reg_handoff_ancp(void); static int hf_ancp_len = -1; static int hf_ancp_len2 = -1; static int hf_ancp_ver = -1; static int hf_ancp_mtype = -1; static int hf_ancp_timer = -1; static int hf_ancp_adj_code = -1; static int hf_ancp_sender_name = -1; static int hf_ancp_receiver_name = -1; static int hf_ancp_sender_port = -1; static int hf_ancp_receiver_port = -1; static int hf_ancp_p_info = -1; static int hf_ancp_sender_instance = -1; static int hf_ancp_p_id = -1; static int hf_ancp_receiver_instance = -1; static int hf_ancp_tech_type = -1; static int hf_ancp_num_tlvs = -1; static int hf_ancp_tot_len = -1; static int hf_ancp_cap = -1; static int hf_ancp_result = -1; static int hf_ancp_code = -1; static int hf_ancp_trans_id = -1; static int hf_ancp_i_flag = -1; static int hf_ancp_submsg_num = -1; static int hf_ancp_pudm_unused = -1; static int hf_ancp_function = -1; static int hf_ancp_x_function = -1; static int hf_ancp_ext_flags_res = -1; static int hf_ancp_reserved = -1; static int hf_ancp_blk_len = -1; static int hf_ancp_num_ext_tlvs = -1; static int hf_ancp_ext_tlv_type = -1; static int hf_ancp_ext_tlv_len = -1; static int hf_ancp_dsl_line_stlv_type = -1; static int hf_ancp_dsl_line_stlv_len = -1; static int hf_ancp_dsl_line_stlv_value = -1; static int hf_ancp_ext_tlv_value_str = -1; static int hf_ancp_oam_opaque = -1; static int hf_ancp_oam_loopb_cnt = -1; static int hf_ancp_oam_timeout = -1; static gint ett_ancp_len = -1; static gint ett_ancp_ver = -1; static gint ett_ancp_mtype = -1; static gint ett_ancp_timer = -1; static gint ett_ancp_adj_code = -1; static gint ett_ancp_sender_name = -1; static gint ett_ancp_receiver_name = -1; static gint ett_ancp_sender_port = -1; static gint ett_ancp_receiver_port = -1; static gint ett_ancp_p_info = -1; static gint ett_ancp_sender_instance = -1; static gint ett_ancp_p_id = -1; static gint ett_ancp_receiver_instance = -1; static gint ett_ancp_tech_type = -1; static gint ett_ancp_num_tlvs = -1; static gint ett_ancp_tot_len = -1; static gint ett_ancp_cap = -1; static gint ett_ancp_result = -1; static gint ett_ancp_code = -1; static gint ett_ancp_trans_id = -1; static gint ett_ancp_i_flag = -1; static gint ett_ancp_submsg_num = -1; static gint ett_ancp_port = -1; static gint ett_ancp_port_sess_num= -1; static gint ett_ancp_evt_seq_num = -1; static gint ett_ancp_label = -1; static gint ett_ancp_reserved = -1; static gint ett_ancp_blk_len = -1; static gint ett_ancp_num_ext_tlvs = -1; static gint ett_ancp_ext_tlv_type = -1; static gint ett_ancp_dsl_line_stlv_type = -1; static gint ett_ancp_dsl_line_stlv_val = -1; static gint ett_ancp_ext_tlv_value_str = -1; static gint ett_ancp_oam_opaque = -1; static gint ett_ancp_oam_loopb_cnt = -1; static gint ett_ancp_oam_timeout = -1; static int proto_ancp = -1; /* ANCP stats - Tap interface */ static const guint8 *st_str_packets = "Total Packets"; static const guint8 *st_str_packet_types = "ANCP Packet Types"; static const guint8 *st_str_adj_pack_types = "ANCP Adjacency Packet Types"; static int st_node_packets = -1; static int st_node_packet_types = -1; static int st_node_adj_pack_types = -1; static int ancp_tap = -1; struct ancp_tap_t { gint ancp_mtype; gint ancp_adjcode; /* valid for ancp adjacency message only */ }; /* Value Strings */ static const value_string mtype_names[] = { { 10, "Adjacency" }, { 32, "Port-Management" }, { 80, "Port-Up" }, { 81, "Port-Down" }, { 85, "Adjacency Update" }, { 91, "Generic Response" }, { 93, "Provisioning" }, { 0, NULL } }; static const value_string adj_code_names[] = { { 1, "Syn" }, { 2, "SynAck" }, { 3, "Ack" }, { 4, "Rstack" }, { 0, NULL } }; static const value_string captype_names[] = { { 1, "Dynamic-Topology-Discovery" }, { 2, "Line-Configuration" }, { 3, "Transactional-Multicast" }, { 4, "OAM" }, { 0, NULL } }; static const value_string resulttype_names[] = { { 0, "Ignore" }, { 1, "NAck" }, { 2, "AckAll" }, { 3, "Success" }, { 4, "Failure" }, { 0, NULL } }; static const value_string codetype_names[] = { { 0x000, "No result" }, { 0x002, "Invalid request message" }, { 0x006, "One or more of the specified ports are down" }, { 0x013, "Out of resources" }, { 0x051, "Request message type not implemented" }, { 0x053, "Malformed message" }, { 0x054, "Mandatory TLV missing" }, { 0x055, "Invalid TLV contents" }, { 0x500, "One or more of the specified ports do not exist" }, { 0x501, "Loopback test timed out" }, { 0x502, "Reserved" }, { 0x503, "DSL access line status showtime" }, { 0x504, "DSL access line status idle" }, { 0x505, "DSL access line status silent" }, { 0x506, "DSL access line status training" }, { 0x507, "DSL access line integrity error" }, { 0x508, "DSLAM resource not available" }, { 0x509, "Invalid test parameter" }, { 0, NULL } }; static const value_string techtype_str[] = { { 0x00, "Not technology dependent" }, { 0x01, "PON" }, { 0x05, "DSL" }, { 0xFF, "Reserved" }, { 0, NULL } }; static const value_string dsl_line_attrs[] = { { 0x91, "DSL-Type" }, { 0x81, "Actual-Net-Data-Rate-Upstream" }, { 0x82, "Actual-Net-Data-Rate-Downstream" }, { 0x83, "Minimum-Net-Data-Rate-Upstream" }, { 0x84, "Minimum-Net-Data-Rate-Downstream" }, { 0x85, "Attainable-Net-Data-Rate-Upstream" }, { 0x86, "Attainable-Net-Data-Rate-Downstream" }, { 0x87, "Maximum-Net-Data-Rate-Upstream" }, { 0x88, "Maximum-Net-Data-Rate-Downstream" }, { 0x89, "Minimum-Net-Low-Power-Data-Rate-Upstream" }, { 0x8A, "Minimum-Net-Low-Power-Data-Rate-Downstream" }, { 0x8B, "Maximum-Interleaving-Delay-Upstream" }, { 0x8C, "Actual-Interleaving-Delay-Upstream" }, { 0x8D, "Maximum-Interleaving-Delay-Downstream" }, { 0x8E, "Actual-Interleaving-Delay-Downstream" }, { 0x8F, "DSL line state" }, { 0x90, "Access Loop Encapsulation" }, { 0, NULL } }; static const value_string dsl_line_attr_units[] = { { 0x91, "" }, { 0x81, "Kb/sec" }, { 0x82, "Kb/sec" }, { 0x83, "Kb/sec" }, { 0x84, "Kb/sec" }, { 0x85, "Kb/sec" }, { 0x86, "Kb/sec" }, { 0x87, "Kb/sec" }, { 0x88, "Kb/sec" }, { 0x89, "Kb/sec" }, { 0x8A, "Kb/sec" }, { 0x8B, "msec" }, { 0x8C, "msec" }, { 0x8D, "msec" }, { 0x8E, "msec" }, { 0x8F, "" }, { 0x90, "" }, { 0, NULL } }; static const value_string dsl_line_type_names[] = { { 1, "ADSL1" }, { 2, "ADSL2" }, { 3, "ADSL2+" }, { 4, "VDSL1" }, { 5, "VDSL2" }, { 6, "SDSL" }, { 0, NULL } }; static const value_string dsl_line_state_names[] = { { 1, "Showtime" }, { 2, "Idle" }, { 3, "Silent" }, { 0, NULL } }; static const value_string function_names[] = { { 0, "Reserved" }, { 8, "Configure Connection Service Data" }, { 9, "Remote Loopback" }, { 0, NULL } }; static const value_string ext_tlv_types[] = { { 0x0001, "Access-Loop-Circuit-ID" }, { 0x0002, "Access-Loop-Remote-ID" }, { 0x0003, "Access-Aggregation-Circuit-ID-ASCII" }, { 0x0004, "DSL Line Attributes" }, { 0x0005, "Service-Profile-Name" }, { 0x0006, "Access-Aggregation-Circuit-ID-Binary" }, { 0x0007, "OAM-Loopback-Test-Parameters" }, { 0x0008, "Opaque-Data" }, { 0x0009, "OAM-Loopback-Test-Response-String" }, { 0x0011, "Command" }, { 0x0013, "Multicast-Service-Profile" }, { 0x0015, "Bandwidth-Allocation" }, { 0x0016, "Bandwidth-Request" }, { 0x0018, "Multicast-Service-Profile-Name" }, { 0x0019, "Multicast-Flow" }, { 0x0021, "List-Action" }, { 0x0022, "Sequence-Number" }, { 0x0024, "White-List-CAC" }, { 0x0025, "MRepCtl-CAC" }, { 0x0081, "Actual-Net-Data-Rate-Upstream" }, { 0x0082, "Actual-Net-Data-Rate-Downstream" }, { 0x0083, "Minimum-Net-Data-Rate-Upstream" }, { 0x0084, "Minimum-Net-Data-Rate-Downstream" }, { 0x0085, "Attainable-Net-Data-Rate-Upstream" }, { 0x0086, "Attainable-Net-Data-Rate-Downstream" }, { 0x0087, "Maximum-Net-Data-Rate-Upstream" }, { 0x0088, "Maximum-Net-Data-Rate-Downstream" }, { 0x0089, "Minimum-Net-Low-Power-Data-Rate-Upstream" }, { 0x008A, "Minimum-Net-Low-Power-Data-Rate-Downstream" }, { 0x008B, "Maximum-Interleaving-Delay-Upstream" }, { 0x008C, "Actual-Interleaving-Delay-Upstream" }, { 0x008D, "Maximum-Interleaving-Delay-Downstream" }, { 0x008E, "Actual-Interleaving-Delay-Downstream" }, { 0x008F, "DSL-Line-State" }, { 0x0090, "Access-Loop-Encapsulation" }, { 0x0091, "DSL-Type" }, { 0x0092, "Request-Source-IP" }, { 0x0093, "Request-Source-MAC" }, { 0x0094, "Report-Buffering-Time" }, { 0x0095, "Committed-Bandwidth" }, { 0x0096, "Request-Source-Device-Id" }, { 0x0106, "Status-Info" }, { 0x1000, "Target (single access line variant)" }, { 0, NULL } }; static value_string_ext ext_tlv_types_ext = VALUE_STRING_EXT_INIT(ext_tlv_types); static gint dissect_ancp_tlv(tvbuff_t *tvb, proto_tree *tlv_tree, gint offset) { guint16 tlen, ttype; gint16 num_stlvs; proto_item *tti; proto_tree_add_item(tlv_tree, hf_ancp_ext_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN); ttype = tvb_get_ntohs(tvb, offset); offset += 2; tti = proto_tree_add_item(tlv_tree, hf_ancp_ext_tlv_len, tvb, offset, 2, ENC_BIG_ENDIAN); tlen = tvb_get_ntohs(tvb, offset); offset += 2; /* * Extension Block is common for event message and port * management message, but the TLVs that can appear * are different */ switch (ttype) { case TLV_DSL_LINE_ATTRIBUTES: { proto_tree *dsl_tree; guint16 stlvtype, stlvlen; gint val; /* Create a DSL Attribute SubTree */ dsl_tree = proto_item_add_subtree(tti, ett_ancp_ext_tlv_type); num_stlvs = tlen / 8; /* TODO - better way? */ for ( ;num_stlvs; num_stlvs--) { proto_tree_add_item(dsl_tree, hf_ancp_dsl_line_stlv_type, tvb, offset, 2, ENC_BIG_ENDIAN); stlvtype = tvb_get_ntohs(tvb, offset); offset += 2; proto_tree_add_item(dsl_tree, hf_ancp_dsl_line_stlv_len, tvb, offset, 2, ENC_BIG_ENDIAN); stlvlen = tvb_get_ntohs(tvb, offset); offset += 2; /* Sub TLV Length */ tti = proto_tree_add_item(dsl_tree, hf_ancp_dsl_line_stlv_value, tvb, offset, stlvlen, ENC_BIG_ENDIAN); val = tvb_get_ntohl(tvb, offset); switch (stlvtype) { case TLV_DSL_LINE_STATE: proto_item_append_text(tti, " (%s)", val_to_str(val, dsl_line_state_names, "Unknown (0x%02x)")); break; case TLV_DSL_TYPE: proto_item_append_text(tti, " (%s)", val_to_str(val, dsl_line_type_names, "Unknown (0x%02x)")); break; default: /* Add Unit */ proto_item_append_text(tti, " %s", val_to_str(stlvtype, dsl_line_attr_units, "Unknown (0x%02x)")); break; } offset += WS_ROUNDUP_4(stlvlen); /* Except loop-encap, rest are 4B */ } break; } case TLV_PING_OPAQUE_DATA: /* 2 32b values*/ proto_tree_add_item(tlv_tree, hf_ancp_oam_opaque, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tlv_tree, hf_ancp_oam_opaque, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; break; case TLV_PING_PARAMS: /* Count (1B) Timeout (1B), 2B empty */ proto_tree_add_item(tlv_tree, hf_ancp_oam_loopb_cnt, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tlv_tree, hf_ancp_oam_timeout, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; /* Lets not bother about 2B until IETF WG figures out */ offset += 2; break; default: /* Assume TLV value is string - covers ALCID, OAM resp */ proto_tree_add_item(tlv_tree, hf_ancp_ext_tlv_value_str, tvb, offset, tlen, ENC_ASCII); offset += WS_ROUNDUP_4(tlen); break; } /* end switch {ttype} */ return offset; } static void dissect_ancp_port_up_dn_mgmt(tvbuff_t *tvb, proto_tree *ancp_tree, gint offset, guint8 mtype) { guint8 tech_type; gint16 num_tlvs; proto_item *sti; if (mtype == ANCP_MTYPE_PORT_MGMT) { proto_tree_add_item(ancp_tree, hf_ancp_pudm_unused, tvb, offset, 14, ENC_NA); offset += 14; proto_tree_add_item(ancp_tree, hf_ancp_function, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(ancp_tree, hf_ancp_x_function, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(ancp_tree, hf_ancp_pudm_unused, tvb, offset, 4, ENC_NA); offset += 4; } else { proto_tree_add_item(ancp_tree, hf_ancp_pudm_unused, tvb, offset, 20, ENC_NA); offset += 20; } proto_tree_add_item(ancp_tree, hf_ancp_ext_flags_res, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(ancp_tree, hf_ancp_mtype, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; if (mtype == ANCP_MTYPE_PORT_MGMT) { proto_tree_add_item(ancp_tree, hf_ancp_reserved, tvb, offset, 2, ENC_NA); offset += 2; tech_type = 0; } else { proto_tree_add_item(ancp_tree, hf_ancp_tech_type, tvb, offset, 1, ENC_BIG_ENDIAN); tech_type = tvb_get_guint8(tvb, offset); offset += 1; proto_tree_add_item(ancp_tree, hf_ancp_reserved, tvb, offset, 1, ENC_NA); offset += 1; } proto_tree_add_item(ancp_tree, hf_ancp_num_ext_tlvs, tvb, offset, 2, ENC_BIG_ENDIAN); num_tlvs = tvb_get_ntohs(tvb, offset); offset += 2; sti = proto_tree_add_item(ancp_tree, hf_ancp_blk_len, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if (tech_type == TECH_TYPE_DSL || tech_type == TECH_TYPE_PON) { proto_tree *tlv_tree; /* Create a TLV sub tree */ tlv_tree = proto_item_add_subtree(sti, ett_ancp_len); for( ;num_tlvs; num_tlvs--) { offset = dissect_ancp_tlv(tvb, tlv_tree, offset); } /* end for {numtlvs} */ } /* end if {DSL} */ } static void dissect_ancp_adj_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ancp_tree, gint offset, struct ancp_tap_t *ancp_info ) { proto_item *sti; proto_tree *ancp_cap_tree; guint8 byte, numcaps, adjcode; guint16 tlv_len; sti = proto_tree_add_item(ancp_tree, hf_ancp_timer, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_item_append_text(sti, " msec"); sti = proto_tree_add_item(ancp_tree, hf_ancp_adj_code, tvb, offset, 1, ENC_BIG_ENDIAN); byte = tvb_get_guint8(tvb, offset); offset += 1; adjcode = byte & ADJ_CODE_MASK; ancp_info->ancp_adjcode = adjcode; /* stats */ proto_item_append_text(sti, " (%s, M Flag %s)", val_to_str(adjcode, adj_code_names, "Unknown (0x%02x)"), (byte >> 7) ? "Set" : "Unset"); col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", val_to_str(adjcode, adj_code_names, "Unknown (0x%02x)")); proto_tree_add_item(ancp_tree, hf_ancp_sender_name, tvb, offset, 6, ENC_NA); offset += 6; proto_tree_add_item(ancp_tree, hf_ancp_receiver_name, tvb,offset, 6, ENC_NA); offset += 6; proto_tree_add_item(ancp_tree, hf_ancp_sender_port, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(ancp_tree, hf_ancp_receiver_port, tvb,offset, 4, ENC_BIG_ENDIAN); offset += 4; sti = proto_tree_add_item(ancp_tree, hf_ancp_p_info, tvb, offset, 1, ENC_BIG_ENDIAN); byte = tvb_get_guint8(tvb, offset); offset += 1; proto_item_append_text(sti, " (Type = %d, Flag = %d)", byte >> 4, byte & 0x0F); proto_tree_add_item(ancp_tree, hf_ancp_sender_instance, tvb, offset, 3, ENC_BIG_ENDIAN); offset += 3; proto_tree_add_item(ancp_tree, hf_ancp_p_id, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(ancp_tree, hf_ancp_receiver_instance, tvb, offset, 3, ENC_BIG_ENDIAN); offset += 3; proto_tree_add_item(ancp_tree, hf_ancp_reserved, tvb, offset, 1, ENC_NA); offset += 1; sti = proto_tree_add_item(ancp_tree, hf_ancp_num_tlvs, tvb, offset, 1, ENC_BIG_ENDIAN); numcaps = tvb_get_guint8(tvb, offset); offset += 1; /* Start the capability subtree */ ancp_cap_tree = proto_item_add_subtree(sti, ett_ancp_tot_len); proto_tree_add_item(ancp_cap_tree, hf_ancp_tot_len, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; for ( ;numcaps; numcaps--) { sti = proto_tree_add_item(ancp_cap_tree, hf_ancp_cap, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; tlv_len = tvb_get_ntohs(tvb, offset); offset += 2; proto_item_append_text(sti, " (%d bytes)", tlv_len); /* TODO - if there are non boolean caps, validate before use */ } } static void ancp_stats_tree_init(stats_tree *st) { st_node_packets = stats_tree_create_node(st, st_str_packets, 0, STAT_DT_INT, TRUE); st_node_packet_types = stats_tree_create_pivot(st, st_str_packet_types, st_node_packets); st_node_adj_pack_types = stats_tree_create_node(st, st_str_adj_pack_types, st_node_packets, STAT_DT_INT, TRUE); } static tap_packet_status ancp_stats_tree_packet(stats_tree* st, packet_info* pinfo _U_, epan_dissect_t* edt _U_ , const void* p, tap_flags_t flags _U_) { const struct ancp_tap_t *pi = (const struct ancp_tap_t *) p; tick_stat_node(st, st_str_packets, 0, FALSE); stats_tree_tick_pivot(st, st_node_packet_types, val_to_str(pi->ancp_mtype, mtype_names, "Unknown packet type (%d)")); if (pi->ancp_mtype == ANCP_MTYPE_ADJ) stats_tree_tick_pivot(st, st_node_adj_pack_types, val_to_str(pi->ancp_adjcode, adj_code_names, "Unknown Adjacency packet (%d)")); return TAP_PACKET_REDRAW; } static int dissect_ancp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { gint offset; guint8 mtype; struct ancp_tap_t *ancp_info; proto_item *ti; proto_item *sti; proto_item *tti = NULL; proto_tree *ancp_tree; proto_tree *tlv_tree; guint8 byte; guint16 len; offset = 0; if (tvb_get_ntohs(tvb, offset) != ANCP_GSMP_ETHER_TYPE) return 0; /* XXX: this dissector is not a heuristic dissector */ /* Should do "expert" & dissect rest as "data" */ /* (after setting COL_PROTOCOL & etc) ? */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "ANCP"); col_clear(pinfo->cinfo, COL_INFO); ancp_info = wmem_new(pinfo->pool, struct ancp_tap_t); ancp_info->ancp_mtype = 0; ancp_info->ancp_adjcode = 0; ti = proto_tree_add_item(tree, proto_ancp, tvb, 0, -1, ENC_NA); ancp_tree = proto_item_add_subtree(ti, ett_ancp_len); offset = 2; /* skip ether type */ proto_tree_add_item(ancp_tree, hf_ancp_len, tvb, offset, 2, ENC_BIG_ENDIAN); len = tvb_get_ntohs(tvb, offset); offset += 2; sti = proto_tree_add_item(ancp_tree, hf_ancp_ver, tvb, offset, 1, ENC_BIG_ENDIAN); byte = tvb_get_guint8(tvb, offset); offset += 1; proto_item_append_text(sti, " (%d.%d)", byte >> 4, byte & 0x0F); sti = proto_tree_add_item(ancp_tree, hf_ancp_mtype, tvb, offset, 1, ENC_BIG_ENDIAN); mtype = tvb_get_guint8(tvb, offset); /* ANCP message type */ ancp_info->ancp_mtype = mtype; /* stats */ offset += 1; col_add_fstr(pinfo->cinfo, COL_INFO, "%s Message", val_to_str(mtype, mtype_names, "Unknown (0x%02x)")); if (mtype != ANCP_MTYPE_ADJ) { /* Dissect common header */ proto_tree_add_item(ancp_tree, hf_ancp_result, tvb, offset, 1, ENC_BIG_ENDIAN); /* treat as 1B, but don't change offset */ proto_tree_add_item(ancp_tree, hf_ancp_code, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(ancp_tree, hf_ancp_p_id, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(ancp_tree, hf_ancp_trans_id, tvb, offset, 3, ENC_BIG_ENDIAN); offset += 3; proto_tree_add_item(ancp_tree, hf_ancp_i_flag, tvb, offset, 1, ENC_BIG_ENDIAN); /* treat as 1B, but don't change offset */ proto_tree_add_item(ancp_tree, hf_ancp_submsg_num, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; tti = proto_tree_add_item(ancp_tree, hf_ancp_len2, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; /* Length */ } switch(mtype) { case ANCP_MTYPE_ADJ: dissect_ancp_adj_msg(tvb, pinfo, ancp_tree, offset, ancp_info); break; case ANCP_MTYPE_PORT_DN: /* FALL THRU */ case ANCP_MTYPE_PORT_MGMT: /* FALL THRU */ case ANCP_MTYPE_PORT_UP: dissect_ancp_port_up_dn_mgmt(tvb, ancp_tree, offset, mtype); break; case ANCP_MTYPE_PROV: /* FALL THRU */ case ANCP_MTYPE_GEN_RSP: tlv_tree = proto_item_add_subtree(tti, ett_ancp_len); while( offset < len + 4) { offset = dissect_ancp_tlv(tvb, tlv_tree, offset); } break; case ANCP_MTYPE_ADJ_UPD: break; default: proto_item_append_text(sti, " (Unknown Message %d)", mtype); break; } tap_queue_packet(ancp_tap, pinfo, ancp_info); return tvb_reported_length(tvb); } static guint get_ancp_msg_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_) { return (guint)tvb_get_ntohs(tvb, offset + 2) + 4; /* 2B len + 4B hdr */ } static int dissect_ancp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) { tcp_dissect_pdus(tvb, pinfo, tree, TRUE, ANCP_MIN_HDR, get_ancp_msg_len, dissect_ancp_message, data); return tvb_reported_length(tvb); } void proto_register_ancp(void) { static hf_register_info hf[] = { { &hf_ancp_len, { "Length", "ancp.len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_len2, { "Length", "ancp.len2", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_ver, { "Version", "ancp.ver", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_mtype, { "Message Type", "ancp.mtype", FT_UINT8, BASE_DEC, VALS(mtype_names), 0x0, NULL, HFILL } }, { &hf_ancp_timer, { "Timer", "ancp.timer", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL } }, { &hf_ancp_adj_code, { "Code", "ancp.adjcode", /* this is diff from code */ FT_UINT8, BASE_DEC, /* for Adjacency msg only */ NULL, ADJ_CODE_MASK, NULL, HFILL } }, { &hf_ancp_sender_name, { "Sender Name", "ancp.sender_name", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_receiver_name, { "Receiver Name", "ancp.receiver_name", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_sender_port, { "Sender Port", "ancp.sender_port", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_receiver_port, { "Receiver Port", "ancp.receiver_port", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_p_info, { "Partition Info", "ancp.partition_info", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_sender_instance, { "Sender Instance", "ancp.sender_instance", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_p_id, { "Partition ID", "ancp.partition_id", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_receiver_instance, { "Receiver Instance", "ancp.receiver_instance", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_tech_type, { "Tech Type", "ancp.tech_type", FT_UINT8, BASE_DEC, VALS(techtype_str), 0x0, NULL, HFILL } }, { &hf_ancp_num_tlvs, { "Num TLVs", "ancp.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_tot_len, { "Length", "ancp.tot_len", /* name just Len to reuse*/ FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_cap, { "Capability", "ancp.capability", FT_UINT16, BASE_DEC, VALS(captype_names), 0x0, NULL, HFILL } }, { &hf_ancp_result, { "Result", "ancp.result", FT_UINT8, BASE_DEC, VALS(resulttype_names), ANCP_RESULT_MASK, NULL, HFILL } }, { &hf_ancp_code, { "Code", "ancp.code", FT_UINT16, BASE_HEX, VALS(codetype_names), ANCP_CODE_MASK, NULL, HFILL } }, { &hf_ancp_trans_id, { "Transaction ID", "ancp.transaction_id", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_i_flag, { "I Flag", "ancp.i_flag", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ANCP_I_FLAG_MASK, NULL, HFILL } }, { &hf_ancp_submsg_num, { "SubMessage Number", "ancp.submessage_number", FT_UINT16, BASE_DEC, NULL, ANCP_SUBMSG_MASK, NULL, HFILL } }, { &hf_ancp_pudm_unused, { "Unused Bytes", "ancp.unused", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_function, { "Function", "ancp.function", FT_UINT8, BASE_DEC, VALS(function_names), 0x0, NULL, HFILL } }, { &hf_ancp_x_function, { "X-Function", "ancp.x_function", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_ext_flags_res, { "Extension Flags Reserved", "ancp.ext_flags", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_reserved, { "Reserved", "ancp.reserved", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_blk_len, { "Block Length", "ancp.blk_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_num_ext_tlvs, { "Num TLVs", "ancp.ext_tlvs.count", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_ext_tlv_type, { "TLV Type", "ancp.ext_tlv.type", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &ext_tlv_types_ext, 0x0, NULL, HFILL } }, { &hf_ancp_ext_tlv_len, { "TLV Length", "ancp.ext_tlv.len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_dsl_line_stlv_type, { "Sub-TLV", "ancp.sub_tlv_type", FT_UINT16, BASE_HEX, VALS(dsl_line_attrs), 0x0, NULL, HFILL } }, { &hf_ancp_dsl_line_stlv_len, { "Sub-TLV Length", "ancp.sub_tlv_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_dsl_line_stlv_value, { "Value", "ancp.dsl_line_param", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_ext_tlv_value_str, { "Value", "ancp.ext_tlv.value", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_oam_opaque, { "Opaque", "ancp.oam.opaque", /* There will be 2 such 32b vals */ FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_oam_loopb_cnt, { "OAM Loopback Count", "ancp.oam.loopback_count", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ancp_oam_timeout, { "OAM Timeout", "ancp.oam.timeout", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_ancp_len, &ett_ancp_ver, &ett_ancp_mtype, &ett_ancp_timer, &ett_ancp_adj_code, &ett_ancp_sender_name, &ett_ancp_receiver_name, &ett_ancp_sender_port, &ett_ancp_receiver_port, &ett_ancp_p_info, &ett_ancp_sender_instance, &ett_ancp_p_id, &ett_ancp_receiver_instance, &ett_ancp_tech_type, &ett_ancp_num_tlvs, &ett_ancp_tot_len, &ett_ancp_cap, &ett_ancp_result, &ett_ancp_code, &ett_ancp_trans_id, &ett_ancp_i_flag, &ett_ancp_submsg_num, &ett_ancp_port, &ett_ancp_port_sess_num, &ett_ancp_evt_seq_num, &ett_ancp_label, &ett_ancp_reserved, &ett_ancp_blk_len, &ett_ancp_num_ext_tlvs, &ett_ancp_ext_tlv_type, &ett_ancp_dsl_line_stlv_type, &ett_ancp_dsl_line_stlv_val, &ett_ancp_ext_tlv_value_str, &ett_ancp_oam_opaque, &ett_ancp_oam_loopb_cnt, &ett_ancp_oam_timeout, }; proto_ancp = proto_register_protocol ( "Access Node Control Protocol", "ANCP", "ancp" ); proto_register_field_array(proto_ancp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); ancp_tap = register_tap("ancp"); } void proto_reg_handoff_ancp(void) { dissector_handle_t ancp_handle; ancp_handle = create_dissector_handle(dissect_ancp, proto_ancp); dissector_add_uint_with_preference("tcp.port", ANCP_PORT, ancp_handle); stats_tree_register("ancp", "ancp", "ANCP", 0, ancp_stats_tree_packet, ancp_stats_tree_init, NULL); } /* * 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: */