/* packet-tsp.c * Routines for Time Synchronization Protocol (TSP) packet dissection * * Uwe Girlich * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * Copied from packet-quake.c * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include /* * For a full documentation of the Time Synchronization Protocol (TSP) see: * http://docs.freebsd.org/44doc/smm/12.timed/paper.pdf */ void proto_register_tsp(void); void proto_reg_handoff_tsp(void); static dissector_handle_t tsp_handle; static int proto_tsp; static int hf_tsp_type; static int hf_tsp_vers; static int hf_tsp_seq; static int hf_tsp_hopcnt; static int hf_tsp_time_sec; static int hf_tsp_time_usec; static int hf_tsp_name; static int ett_tsp; /* timed port from /etc/services */ #define UDP_PORT_TIMED 525 static const value_string names_tsp_type[] = { #define TSP_ANY 0 /* match any types */ { TSP_ANY, "any" }, #define TSP_ADJTIME 1 /* send adjtime */ { TSP_ADJTIME, "adjtime" }, #define TSP_ACK 2 /* generic acknowledgement */ { TSP_ACK, "ack" }, #define TSP_MASTERREQ 3 /* ask for master's name */ { TSP_MASTERREQ, "masterreq" }, #define TSP_MASTERACK 4 /* acknowledge master request */ { TSP_MASTERACK, "masterack" }, #define TSP_SETTIME 5 /* send network time */ { TSP_SETTIME, "settime" }, #define TSP_MASTERUP 6 /* inform slaves that master is up */ { TSP_MASTERUP, "masterup" }, #define TSP_SLAVEUP 7 /* slave is up but not polled */ { TSP_SLAVEUP, "slaveup" }, #define TSP_ELECTION 8 /* advance candidature for master */ { TSP_ELECTION, "election" }, #define TSP_ACCEPT 9 /* support candidature of master */ { TSP_ACCEPT, "accept" }, #define TSP_REFUSE 10 /* reject candidature of master */ { TSP_REFUSE, "refuse" }, #define TSP_CONFLICT 11 /* two or more masters present */ { TSP_CONFLICT, "conflict" }, #define TSP_RESOLVE 12 /* masters' conflict resolution */ { TSP_RESOLVE, "resolve" }, #define TSP_QUIT 13 /* reject candidature if master is up */ { TSP_QUIT, "quit" }, #define TSP_DATE 14 /* reset the time (date command) */ { TSP_DATE, "date" }, #define TSP_DATEREQ 15 /* remote request to reset the time */ { TSP_DATEREQ, "datereq" }, #define TSP_DATEACK 16 /* acknowledge time setting */ { TSP_DATEACK, "dateack" }, #define TSP_TRACEON 17 /* turn tracing on */ { TSP_TRACEON, "traceon" }, #define TSP_TRACEOFF 18 /* turn tracing off */ { TSP_TRACEOFF, "traceoff" }, #define TSP_MSITE 19 /* find out master's site */ { TSP_MSITE, "msite" }, #define TSP_MSITEREQ 20 /* remote master's site request */ { TSP_MSITEREQ, "msitereq" }, #define TSP_TEST 21 /* for testing election algo */ { TSP_TEST, "test" }, #define TSP_SETDATE 22 /* New from date command */ { TSP_SETDATE, "setdate" }, #define TSP_SETDATEREQ 23 /* New remote for above */ { TSP_SETDATEREQ, "setdatereq" }, #define TSP_LOOP 24 /* loop detection packet */ { TSP_LOOP, "loop" }, { 0, NULL } }; static int dissect_tsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree *tsp_tree; proto_item *tsp_item; uint8_t tsp_type; col_set_str(pinfo->cinfo, COL_PROTOCOL, "TSP"); col_clear(pinfo->cinfo, COL_INFO); tsp_type = tvb_get_uint8(tvb, 0); col_add_str(pinfo->cinfo, COL_INFO, val_to_str(tsp_type, names_tsp_type, "Unknown message type (%u)")); tsp_item = proto_tree_add_item(tree, proto_tsp, tvb, 0, -1, ENC_NA); tsp_tree = proto_item_add_subtree(tsp_item, ett_tsp); if (tsp_tree) { proto_tree_add_uint(tsp_tree, hf_tsp_type, tvb, 0, 1, tsp_type); proto_tree_add_item(tsp_tree, hf_tsp_vers, tvb, 1, 1, ENC_BIG_ENDIAN); proto_tree_add_item(tsp_tree, hf_tsp_seq, tvb, 2, 2, ENC_BIG_ENDIAN); } switch (tsp_type) { case TSP_LOOP: if (tsp_tree) proto_tree_add_item(tsp_tree, hf_tsp_hopcnt, tvb, 4, 1, ENC_BIG_ENDIAN); break; case TSP_SETTIME: case TSP_ADJTIME: case TSP_SETDATE: case TSP_SETDATEREQ: if (tsp_tree) { proto_tree_add_item(tsp_tree, hf_tsp_time_sec, tvb, 4, 4, ENC_BIG_ENDIAN); proto_tree_add_item(tsp_tree, hf_tsp_time_usec, tvb, 8, 4, ENC_BIG_ENDIAN); } break; } if (tsp_tree) { proto_tree_add_item(tsp_tree, hf_tsp_name, tvb, 12, -1, ENC_ASCII); } return tvb_captured_length(tvb); } void proto_reg_handoff_tsp(void) { dissector_add_uint_with_preference("udp.port", UDP_PORT_TIMED, tsp_handle); } void proto_register_tsp(void) { static hf_register_info hf[] = { { &hf_tsp_type, { "Type", "tsp.type", FT_UINT8, BASE_DEC, VALS(names_tsp_type), 0x0, "Packet Type", HFILL }}, { &hf_tsp_vers, { "Version", "tsp.version", FT_UINT8, BASE_DEC, NULL, 0x0, "Protocol Version Number", HFILL }}, { &hf_tsp_seq, { "Sequence", "tsp.sequence", FT_UINT16, BASE_DEC, NULL, 0x0, "Sequence Number", HFILL }}, { &hf_tsp_hopcnt, { "Hop Count", "tsp.hopcnt", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_tsp_time_sec, { "Seconds", "tsp.sec", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_tsp_time_usec, { "Microseconds", "tsp.usec", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_tsp_name, { "Machine Name", "tsp.name", FT_STRINGZ, BASE_NONE, NULL, 0x0, "Sender Machine Name", HFILL }} }; static int *ett[] = { &ett_tsp }; proto_tsp = proto_register_protocol("Time Synchronization Protocol", "TSP", "tsp"); proto_register_field_array(proto_tsp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); tsp_handle = register_dissector("tsp", dissect_tsp, proto_tsp); } /* * Editor modelines - https://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 8 * tab-width: 8 * indent-tabs-mode: t * End: * * vi: set shiftwidth=8 tabstop=8 noexpandtab: * :indentSize=8:tabSize=8:noTabs=false: */