X-Git-Url: http://p2p-next.cs.pub.ro/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Flibswift%2Fdoc%2Fwireshark-dissector%2Fpacket-swift.c;fp=src%2Flibswift%2Fdoc%2Fwireshark-dissector%2Fpacket-swift.c;h=719006134a1b9395c649c1878e4695369d0f0a26;hb=45963a7511531cd1656ad5d3847d2dafd015c54d;hp=0000000000000000000000000000000000000000;hpb=d069796805ad79542fd7e4406d1e9c6d2d8c2ef7;p=swifty.git diff --git a/src/libswift/doc/wireshark-dissector/packet-swift.c b/src/libswift/doc/wireshark-dissector/packet-swift.c new file mode 100644 index 0000000..7190061 --- /dev/null +++ b/src/libswift/doc/wireshark-dissector/packet-swift.c @@ -0,0 +1,383 @@ +/* packet-swift.c + * Routines for swift protocol packet disassembly + * By Andrew Keating + * Copyright 2011 Andrew Keating + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include + +static int proto_swift = -1; + +/* Global fields */ +static int hf_swift_receiving_channel = -1; +static int hf_swift_message_type = -1; + +/* 00 Handshake fields */ +static int hf_swift_handshake_channel = -1; + +/* 01 Data fields */ +static int hf_swift_data_bin_id = -1; +static int hf_swift_data_payload = -1; + +/* 02 Ack fields */ +static int hf_swift_ack_bin_id = -1; +static int hf_swift_ack_timestamp = -1; + +/* 03 Have fields */ +static int hf_swift_have_bin_id = -1; + +/* 04 Hash fields */ +static int hf_swift_hash_bin_id = -1; +static int hf_swift_hash_value = -1; + +/* 05 PEX+ fields */ +static int hf_swift_pexplus_ip = -1; +static int hf_swift_pexplus_port = -1; + +/* 06 PEX- fields */ +static int hf_swift_pexminus_ip = -1; +static int hf_swift_pexminus_port = -1; + +/* 07 Signed hash fields */ +static int hf_swift_signed_hash_bin_id = -1; +static int hf_swift_signed_hash_value = -1; +static int hf_swift_signed_hash_signature = -1; + +/* 08 Hint fields */ +static int hf_swift_hint_bin_id = -1; + +static gint ett_swift = -1; + +static void dissect_swift(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); +static gboolean dissect_swift_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static const value_string message_type_names[] = { + { 0, "Handshake" }, + { 1, "Data" }, + { 2, "Ack" }, + { 3, "Have" }, + { 4, "Hash" }, + { 5, "PEX+" }, + { 6, "PEX-" }, + { 7, "Signed Hash" }, + { 8, "Hint" }, + { 9, "SWIFT_MSGTYPE_RCVD" }, + { 10, "SWIFT_MESSAGE_COUNT" }, + { 0, NULL} +}; + + +void +proto_register_swift(void) +{ + static hf_register_info hf[] = { + /* Global */ + { &hf_swift_receiving_channel, + { "Receiving Channel", "swift.receiving.channel", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_message_type, + { "Message Type", "swift.message.type", + FT_UINT8, BASE_DEC, + VALS(message_type_names), 0x0, + NULL, HFILL } + }, + + /* 00 Handshake */ + { &hf_swift_handshake_channel, + { "Handshake Channel", "swift.handshake.channel", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + + /* 01 Data */ + { &hf_swift_data_bin_id, + { "Data Bin ID", "swift.data.bin_id", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_data_payload, + { "Data Payload", "swift.data.payload", + FT_BYTES, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + + /* 02 Ack */ + { &hf_swift_ack_bin_id, + { "Ack Bin ID", "swift.ack.bin_id", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_ack_timestamp, + { "Timestamp", "swift.ack.timestamp", + FT_UINT64, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + + /* 03 Have */ + { &hf_swift_have_bin_id, + { "Have Bin ID", "swift.have.bin_id", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + + /* 04 Hash */ + { &hf_swift_hash_bin_id, + { "Hash Bin ID", "swift.hash.bin_id", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_hash_value, + { "Hash Value", "swift.hash.value", + FT_BYTES, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + + /* 05 PEX+ */ + { &hf_swift_pexplus_ip, + { "PEX+ IP Address", "swift.pex_plus.ip", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_pexplus_port, + { "PEX+ Port", "swift.pex_plus.port", + FT_UINT16, BASE_DEC, + NULL, 0x0, + NULL, HFILL } + }, + + /* 06 PEX- */ + { &hf_swift_pexminus_ip, + { "PEX- IP Address", "swift.pex_minus.ip", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_pexminus_port, + { "PEX- Port", "swift.pex_minus.port", + FT_UINT16, BASE_DEC, + NULL, 0x0, + NULL, HFILL } + }, + + /* 07 Signed Hash */ + { &hf_swift_signed_hash_bin_id, + { "Signed Hash Bin ID", "swift.signed_hash.bin_id", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_signed_hash_value, + { "Signed Hash Value", "swift.signed_hash.value", + FT_BYTES, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_swift_signed_hash_signature, + { "Signed Hash Signature", "swift.signed_hash.signature", + FT_BYTES, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + + /* 08 Hint */ + { &hf_swift_hint_bin_id, + { "Hint Bin ID", "swift.hint.bin_id", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + }; + + /* Setup protocol subtree array */ + static gint *ett[] = { + &ett_swift + }; + + proto_swift = proto_register_protocol ( + "swift: the multiparty transport protocol", /* name */ + "swift", /* short name */ + "swift" /* abbrev */ + ); + + proto_register_field_array(proto_swift, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + register_dissector("swift", dissect_swift, proto_swift); +} + +void +proto_reg_handoff_swift(void) +{ + dissector_handle_t swift_handle; + swift_handle = find_dissector("swift"); + + /* Allow "Decode As" with any UDP packet. */ + dissector_add_handle("udp.port", swift_handle); + + /* Add our heuristic packet finder. */ + heur_dissector_add("udp", dissect_swift_heur, proto_swift); +} + +/* This heuristic is somewhat ambiguous, but for research purposes, it should be fine */ +static gboolean +dissect_swift_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint message_length; + message_length = tvb_length(tvb); + /* If the fifth byte isn't one of the supported packet types, it's not swift (except keep-alives) */ + if(message_length != 4) { + guint8 message_type; + message_type = tvb_get_guint8(tvb, 4); + if(message_type > 10) { + return FALSE; + } + } + + dissect_swift(tvb, pinfo, tree); + return TRUE; +} + +static void +dissect_swift(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + gint offset = 0; + col_set_str(pinfo->cinfo, COL_PROTOCOL, "swift"); + /* Clear out stuff in the info column */ + col_clear(pinfo->cinfo,COL_INFO); + + if (tree) { /* we are being asked for details */ + proto_item *ti; + ti = proto_tree_add_item(tree, proto_swift, tvb, 0, -1, FALSE); + + proto_tree *swift_tree; + swift_tree = proto_item_add_subtree(ti, ett_swift); + + /* All messages start with the receiving channel, so we can pull it out here */ + proto_tree_add_item(swift_tree, hf_swift_receiving_channel, tvb, offset, 4, FALSE); offset += 4; + + /* Loop until there is nothing left to read in the packet */ + while(tvb_bytes_exist(tvb, offset, 1)) { + guint8 message_type; + guint dat_len; + message_type = tvb_get_guint8(tvb, offset); + proto_tree_add_item(swift_tree, hf_swift_message_type, tvb, offset, 1, FALSE); + offset += 1; + + /* Add message type to the info column */ + if(offset > 5) { + col_append_fstr(pinfo->cinfo, COL_INFO, ", "); + } + col_append_fstr(pinfo->cinfo, COL_INFO, "%s", + val_to_str(message_type, message_type_names, "Unknown (0x%02x)")); + + /* Add it to the dissection window as well */ + proto_item_append_text(ti, ", %s", + val_to_str(message_type, message_type_names, "Unknown (0x%02x)")); + + switch(message_type) { + case 0: /* Handshake */ + proto_tree_add_item(swift_tree, hf_swift_handshake_channel, tvb, offset, 4, FALSE); + offset += 4; + break; + case 1: /* Data */ + proto_tree_add_item(swift_tree, hf_swift_data_bin_id, tvb, offset, 4, FALSE); + offset += 4; + /* We assume that the data field comprises the rest of this packet */ + dat_len = tvb_length(tvb) - offset; + proto_tree_add_item(swift_tree, hf_swift_data_payload, tvb, offset, dat_len, FALSE); + offset += dat_len; + break; + case 2: /* Ack */ + proto_tree_add_item(swift_tree, hf_swift_ack_bin_id, tvb, offset, 4, FALSE); + offset += 4; + proto_tree_add_item(swift_tree, hf_swift_ack_timestamp, tvb, offset, 8, FALSE); + offset += 8; + break; + case 3: /* Have */ + proto_tree_add_item(swift_tree, hf_swift_have_bin_id, tvb, offset, 4, FALSE); + offset += 4; + break; + case 4: /* Hash */ + proto_tree_add_item(swift_tree, hf_swift_hash_bin_id, tvb, offset, 4, FALSE); + offset += 4; + proto_tree_add_item(swift_tree, hf_swift_hash_value, tvb, offset, 20, FALSE); + offset += 20; + break; + case 5: /* PEX+ */ + proto_tree_add_item(swift_tree, hf_swift_pexplus_ip, tvb, offset, 4, FALSE); + offset += 4; + proto_tree_add_item(swift_tree, hf_swift_pexplus_port, tvb, offset, 2, FALSE); + offset += 2; + break; + case 6: /* PEX- */ + proto_tree_add_item(swift_tree, hf_swift_pexminus_ip, tvb, offset, 4, FALSE); + offset += 4; + proto_tree_add_item(swift_tree, hf_swift_pexminus_port, tvb, offset, 2, FALSE); + offset += 2; + break; + case 7: /* Signed Hash */ + proto_tree_add_item(swift_tree, hf_swift_signed_hash_bin_id, tvb, offset, 4, FALSE); + offset += 4; + proto_tree_add_item(swift_tree, hf_swift_signed_hash_value, tvb, offset, 20, FALSE); + offset += 20; + /* It is not entirely clear what size the public key will be, so we allow any size + For this to work, we must assume there aren't any more messages in the packet */ + dat_len = tvb_length(tvb) - offset; + proto_tree_add_item(swift_tree, hf_swift_signed_hash_signature, tvb, offset, dat_len, FALSE); + offset += dat_len; + break; + case 8: /* Hint */ + proto_tree_add_item(swift_tree, hf_swift_hint_bin_id, tvb, offset, 4, FALSE); + offset += 4; + break; + case 9: /* SWIFT_MSGTYPE_RCVD */ + break; + case 10: /* SWIFT_MESSAGE_COUNT */ + break; + default: + break; + } + } + /* If the offset is still 4 here, the message is a keep-alive */ + if(offset == 4) { + col_append_fstr(pinfo->cinfo, COL_INFO, "Keep-Alive"); + proto_item_append_text(ti, ", Keep-Alive"); + } + } +} +