forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
They already know who they are when they register themselves. Saving the handle then to avoid finding it later. Not sure if this will increase unnecessary register_dissector functions (instead of using create_dissector_handle in proto_reg_handoff function) when other dissectors copy/paste, but it should make startup time a few microseconds better. Change-Id: I3839be791b32b84887ac51a6a65fb5733e9f1f43 Reviewed-on: https://code.wireshark.org/review/19481 Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Anders Broman <a.broman58@gmail.com>
227 lines
6.9 KiB
C
227 lines
6.9 KiB
C
/* packet-ayiya.c
|
|
* Anything in Anything protocol
|
|
* Copyright 2008, Jelmer Vernooij <jelmer@samba.org>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* ref: http://unfix.org/~jeroen/archive/drafts/draft-massar-v6ops-ayiya-02.html#anchor4
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/ipproto.h>
|
|
|
|
void proto_register_ayiya(void);
|
|
void proto_reg_handoff_ayiya(void);
|
|
|
|
static dissector_table_t ip_dissector_table;
|
|
|
|
static int proto_ayiya = -1;
|
|
static int hf_id_len = -1;
|
|
static int hf_id_type = -1;
|
|
static int hf_sig_len = -1;
|
|
static int hf_hash_method = -1;
|
|
static int hf_auth_method = -1;
|
|
static int hf_opcode = -1;
|
|
static int hf_next_header = -1;
|
|
static int hf_epoch = -1;
|
|
static int hf_identity = -1;
|
|
static int hf_signature = -1;
|
|
|
|
static gint ett_ayiya = -1;
|
|
|
|
static dissector_handle_t ayiya_handle = NULL;
|
|
|
|
static const value_string identity_types[] = {
|
|
{ 0x0, "None" },
|
|
{ 0x1, "Integer" },
|
|
{ 0x2, "ASCII string" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string hash_methods[] = {
|
|
{ 0x0, "No hash" },
|
|
{ 0x1, "MD5" },
|
|
{ 0x2, "SHA1" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string auth_methods[] = {
|
|
{ 0x0, "No authentication" },
|
|
{ 0x1, "Hash using a Shared Secret" },
|
|
{ 0x2, "Hash using a public/private key method" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define OPCODE_FORWARD 1
|
|
|
|
static const value_string opcodes[] = {
|
|
{ 0x0, "No Operation / Heartbeat" },
|
|
{ 0x1, "Forward" },
|
|
{ 0x2, "Echo Request" },
|
|
{ 0x3, "Echo Request and Forward" },
|
|
{ 0x4, "Echo Response" },
|
|
{ 0x5, "MOTD" },
|
|
{ 0x6, "Query Request" },
|
|
{ 0x7, "Query Response" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define UDP_PORT_AYIYA 5072
|
|
|
|
static int
|
|
dissect_ayiya(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_tree *ayiya_tree;
|
|
int offset = 0;
|
|
int idlen, siglen, ayiya_len;
|
|
guint8 next_header, opcode;
|
|
tvbuff_t *payload;
|
|
|
|
idlen = 1 << tvb_get_bits8(tvb, 0, 4);
|
|
siglen = tvb_get_bits8(tvb, 8, 4) * 4;
|
|
opcode = tvb_get_bits8(tvb, 20, 4);
|
|
next_header = tvb_get_guint8(tvb, 3);
|
|
|
|
ayiya_len = 8+idlen+siglen;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AYIYA");
|
|
|
|
if (tree) {
|
|
proto_item *ti;
|
|
nstime_t tv;
|
|
ti = proto_tree_add_protocol_format( tree, proto_ayiya, tvb,
|
|
offset, ayiya_len, "AYIYA" );
|
|
ayiya_tree = proto_item_add_subtree(ti, ett_ayiya);
|
|
|
|
proto_tree_add_bits_item(ayiya_tree, hf_id_len, tvb, 0, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_item(ayiya_tree, hf_id_type, tvb, 4, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_item(ayiya_tree, hf_sig_len, tvb, 8, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_item(ayiya_tree, hf_hash_method, tvb, 12, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_item(ayiya_tree, hf_auth_method, tvb, 16, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_item(ayiya_tree, hf_opcode, tvb, 20, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_uint_format_value(ayiya_tree, hf_next_header, tvb,
|
|
3, 1, next_header,
|
|
"%s (0x%02x)",
|
|
ipprotostr(next_header), next_header);
|
|
tv.secs = tvb_get_ntohl(tvb, 4);
|
|
tv.nsecs = 0;
|
|
proto_tree_add_time(ayiya_tree, hf_epoch, tvb, 4, 4, &tv);
|
|
proto_tree_add_item(ayiya_tree, hf_identity, tvb, 8, idlen, ENC_NA);
|
|
proto_tree_add_item(ayiya_tree, hf_signature, tvb, 8+idlen, siglen, ENC_NA);
|
|
}
|
|
offset = ayiya_len;
|
|
switch (opcode) {
|
|
case OPCODE_FORWARD:
|
|
payload = tvb_new_subset_remaining(tvb, offset);
|
|
dissector_try_uint(ip_dissector_table, next_header, payload, pinfo, tree);
|
|
break;
|
|
}
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_ayiya(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_id_len,
|
|
{ "Identity field length", "ayiya.idlen", FT_UINT8,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_id_type,
|
|
{ "Identity field type", "ayiya.idtype", FT_UINT8,
|
|
BASE_HEX, VALS(identity_types), 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_sig_len,
|
|
{ "Signature Length", "ayiya.siglen", FT_UINT8,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_hash_method,
|
|
{ "Hash method", "ayiya.hashmethod", FT_UINT8,
|
|
BASE_HEX, VALS(hash_methods), 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_auth_method,
|
|
{ "Authentication method", "ayiya.authmethod", FT_UINT8,
|
|
BASE_HEX, VALS(auth_methods), 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_opcode,
|
|
{ "Operation Code", "ayiya.opcode", FT_UINT8,
|
|
BASE_HEX, VALS(opcodes), 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_next_header,
|
|
{ "Next Header", "ayiya.nextheader", FT_UINT8,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_epoch,
|
|
{ "Epoch", "ayiya.epoch", FT_ABSOLUTE_TIME,
|
|
ABSOLUTE_TIME_LOCAL, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_identity,
|
|
{ "Identity", "ayiya.identity", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_signature,
|
|
{ "Signature", "ayiya.signature", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_ayiya,
|
|
};
|
|
|
|
proto_ayiya = proto_register_protocol("Anything in Anything Protocol",
|
|
"AYIYA", "ayiya");
|
|
ayiya_handle = register_dissector("ayiya", dissect_ayiya, proto_ayiya);
|
|
proto_register_field_array(proto_ayiya, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_ayiya(void)
|
|
{
|
|
dissector_add_uint_with_preference("udp.port", UDP_PORT_AYIYA, ayiya_handle);
|
|
|
|
ip_dissector_table = find_dissector_table("ip.proto");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://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:
|
|
*/
|