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wireshark/epan/dissectors/packet-rmi.c
Michael Mann 268841f3e0 Combine Decode As and port preferences for tcp.port dissector table. 
This patch introduces new APIs to allow dissectors to have a preference for
a (TCP) port, but the underlying data is actually part of Decode As functionality.
For now the APIs are intentionally separate from the regular APIs that register a
dissector within a dissector table.  It may be possible to eventually combine the
two so that all dissectors that register with a dissector table have an opportunity
to "automatically" have a preference to adjust the "table value" through the
preferences dialog.

The tcp.port dissector table was used as the guinea pig.  This will eventually be
expanded to other dissector tables as well (most notably UDP ports).  Some
dissectors that "shared" a TCP/UDP port preference were also converted. It also
removed the need for some preference callback functions (mostly when the callback
function was the proto_reg_handoff function) so there is cleanup around that.

Dissectors that has a port preference whose default was 0 were switched to using
the dissector_add_for_decode_as_with_preference API rather than dissector_add_uint_with_preference

Also added comments for TCP ports used that aren't IANA registered.

Change-Id: I99604f95d426ad345f4b494598d94178b886eb67
Reviewed-on: https://code.wireshark.org/review/17724
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-10-08 02:44:53 +00:00

391 lines
13 KiB
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/* packet-rmi.c
* Routines for java rmiregistry dissection
* Copyright 2002, Michael Stiller <ms@2scale.net>
*
* 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.
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-rmi.h"
void proto_register_rmi(void);
void proto_reg_handoff_rmi(void);
static void
dissect_ser(tvbuff_t *tvb, proto_tree *tree);
static rmi_type
get_rmi_type(tvbuff_t *tvb, gint offset, int datalen);
/* Initialize the protocol and registered fields */
static int proto_rmi = -1;
static int proto_ser = -1;
static int hf_rmi_magic = -1;
static int hf_rmi_version = -1;
static int hf_rmi_protocol = -1;
static int hf_rmi_inputmessage = -1;
static int hf_rmi_outputmessage = -1;
static int hf_rmi_epid_length = -1;
static int hf_rmi_epid_hostname = -1;
static int hf_rmi_epid_port = -1;
static int hf_rmi_serialization_data = -1;
static int hf_rmi_unique_identifier = -1;
static int hf_ser_magic = -1;
static int hf_ser_version = -1;
/* Initialize the subtree pointers */
static gint ett_rmi = -1;
static gint ett_rmi_magic = -1;
static gint ett_rmi_version = -1;
static gint ett_rmi_inputmessage = -1;
static gint ett_rmi_outputmessage = -1;
static gint ett_rmi_epid_length = -1;
static gint ett_rmi_epid_hostname = -1;
static gint ett_rmi_epid_port = -1;
static gint ett_rmi_endpoint_identifier = -1;
static gint ett_ser = -1;
/*
* See
*
* http://java.sun.com/products/jdk/1.2/docs/guide/rmi/spec/rmi-protocol.doc1.html
*
* for RMI, and
*
* http://java.sun.com/products/jdk/1.2/docs/guide/serialization/spec/protocol.doc.html
*
* for the serialization protocol.
*/
#define TCP_PORT_RMI 1099
static const value_string rmi_protocol_str[] = {
{RMI_OUTPUTSTREAM_PROTOCOL_STREAM, "StreamProtocol"},
{RMI_OUTPUTSTREAM_PROTOCOL_SINGLEOP, "SingleOpProtocol"},
{RMI_OUTPUTSTREAM_PROTOCOL_MULTIPLEX, "MultiPlexProtocol"},
{0, NULL}
};
static const value_string rmi_output_message_str[] = {
{RMI_OUTPUTSTREAM_MESSAGE_CALL, "Call"},
{RMI_OUTPUTSTREAM_MESSAGE_PING, "Ping"},
{RMI_OUTPUTSTREAM_MESSAGE_DGCACK, "DgcAck"},
{0, NULL}
};
static const value_string rmi_input_message_str[] = {
{RMI_INPUTSTREAM_MESSAGE_ACK, "ProtocolAck"},
{RMI_INPUTSTREAM_MESSAGE_NOTSUPPORTED, "ProtocolNotSupported"},
{RMI_INPUTSTREAM_MESSAGE_RETURNDATA, "ReturnData"},
{RMI_INPUTSTREAM_MESSAGE_PINGACK, "PingAck"},
{0, NULL}
};
static int
dissect_rmi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *rmi_tree;
tvbuff_t *next_tvb;
gint offset = 0;
gint next_offset;
int datalen;
guint16 version, len, port;
guint8 message, proto;
rmi_type rmitype;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RMI");
datalen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
rmitype = get_rmi_type(tvb, offset, datalen);
switch(rmitype) {
case RMI_OUTPUTSTREAM:
version = tvb_get_ntohs(tvb,4);
col_add_fstr(pinfo->cinfo, COL_INFO,
"JRMI, Version: %d, ", version);
proto = tvb_get_guint8(tvb, 6);
col_append_str(pinfo->cinfo, COL_INFO,
val_to_str_const(proto, rmi_protocol_str,
"Unknown protocol"));
break;
case RMI_OUTPUTMESSAGE:
message = tvb_get_guint8(tvb,0);
col_set_str(pinfo->cinfo, COL_INFO,
"JRMI, ");
col_append_str(pinfo->cinfo, COL_INFO,
val_to_str_const(message, rmi_output_message_str,
"Unknown message"));
break;
case RMI_INPUTSTREAM:
message = tvb_get_guint8(tvb,0);
col_set_str(pinfo->cinfo, COL_INFO,
"JRMI, ");
col_append_str(pinfo->cinfo, COL_INFO,
val_to_str_const(message, rmi_input_message_str,
"Unknown message"));
break;
case SERIALIZATION_DATA:
version = tvb_get_ntohs(tvb,2);
col_add_fstr(pinfo->cinfo, COL_INFO,
"Serialization data, Version: %d", version);
break;
default:
col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
break;
}
if (tree) {
ti = proto_tree_add_item(tree, proto_rmi, tvb, 0, -1, ENC_NA);
rmi_tree = proto_item_add_subtree(ti, ett_rmi);
switch(rmitype) {
case RMI_OUTPUTSTREAM:
/* XXX - uint, or string? */
proto_tree_add_uint(rmi_tree, hf_rmi_magic,
tvb, offset, 4, tvb_get_ntohl(tvb,0));
proto_tree_add_item(rmi_tree, hf_rmi_version,
tvb, offset + 4, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(rmi_tree, hf_rmi_protocol,
tvb, offset + 6, 1, ENC_BIG_ENDIAN);
break;
case RMI_INPUTSTREAM:
message = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(rmi_tree, hf_rmi_inputmessage,
tvb, offset, 1, message);
if(message == RMI_INPUTSTREAM_MESSAGE_ACK) {
proto_tree* endpoint_tree = proto_tree_add_subtree(rmi_tree, tvb, offset + 1, -1,
ett_rmi_endpoint_identifier, NULL, "EndPointIdentifier");
/* MESSAGE_ACK should include EndpointIdentifier */
len = tvb_get_ntohs(tvb, 1);
proto_tree_add_uint(endpoint_tree, hf_rmi_epid_length,
tvb, offset + 1, 2, len);
if (len > 0) {
proto_tree_add_item(endpoint_tree, hf_rmi_epid_hostname,
tvb, offset + 3, len, ENC_ASCII|ENC_NA);
} else {
proto_tree_add_string(endpoint_tree, hf_rmi_epid_hostname,
tvb, offset + 3, len, "[Empty]");
}
port = tvb_get_ntohs(tvb, offset + len + 5);
proto_tree_add_uint(endpoint_tree, hf_rmi_epid_port,
tvb, offset + len + 5, 2, port);
}
if(message == RMI_INPUTSTREAM_MESSAGE_RETURNDATA) {
proto_tree_add_bytes_format(rmi_tree, hf_rmi_serialization_data, tvb, offset + 1, -1,
NULL, "Serialization Data");
next_tvb = tvb_new_subset_remaining(tvb, offset + 1);
dissect_ser(next_tvb, tree);
}
break;
case RMI_OUTPUTMESSAGE:
message = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(rmi_tree, hf_rmi_outputmessage,
tvb, offset, 1, message);
if(message == RMI_OUTPUTSTREAM_MESSAGE_CALL) {
proto_tree_add_bytes_format(rmi_tree, hf_rmi_serialization_data, tvb, offset + 1, -1,
NULL, "Serialization Data");
/* XXX */
next_tvb = tvb_new_subset_remaining(tvb, offset + 1);
dissect_ser(next_tvb, tree);
}
if(message == RMI_OUTPUTSTREAM_MESSAGE_DGCACK) {
proto_tree_add_item(rmi_tree, hf_rmi_unique_identifier, tvb, offset + 1, -1, ENC_NA);
}
break;
case SERIALIZATION_DATA:
dissect_ser(tvb, tree);
break;
default:
break;
}
}
return tvb_captured_length(tvb);
}
static void
dissect_ser(tvbuff_t *tvb, proto_tree *tree)
{
proto_item *ti;
proto_tree *ser_tree;
gint offset;
offset = 0;
if(tree) {
ti = proto_tree_add_item(tree, proto_ser, tvb, 0, -1, ENC_NA);
ser_tree = proto_item_add_subtree(ti, ett_ser);
proto_tree_add_item(ser_tree, hf_ser_magic,
tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(ser_tree, hf_ser_version,
tvb, offset + 2, 2, ENC_BIG_ENDIAN);
}
}
static rmi_type
get_rmi_type(tvbuff_t *tvb, gint offset, int datalen)
{
guint16 ser_magic;
guchar data[4];
tvb_memcpy(tvb, data, offset, (datalen > 4) ? 4 : datalen);
if (datalen >= 2) {
ser_magic = data[0] << 8 | data[1];
if (ser_magic == SER_STREAM_MAGIC) {
return SERIALIZATION_DATA;
}
}
if (datalen >= 4) {
if(strncmp(data, RMI_MAGIC, 4) == 0) {
return RMI_OUTPUTSTREAM;
}
}
if (datalen >= 1) {
if (data[0] == RMI_INPUTSTREAM_MESSAGE_ACK ||
data[0] == RMI_INPUTSTREAM_MESSAGE_NOTSUPPORTED ||
data[0] == RMI_INPUTSTREAM_MESSAGE_RETURNDATA ||
data[0] == RMI_INPUTSTREAM_MESSAGE_PINGACK) {
return RMI_INPUTSTREAM;
}
}
if (datalen >= 1) {
if (data[0] == RMI_OUTPUTSTREAM_MESSAGE_CALL ||
data[0] == RMI_OUTPUTSTREAM_MESSAGE_PING ||
data[0] == RMI_OUTPUTSTREAM_MESSAGE_DGCACK) {
return RMI_OUTPUTMESSAGE;
}
}
return CONTINUATION;
}
void
proto_register_rmi(void)
{
static hf_register_info hf[] = {
{ &hf_rmi_magic,
{ "Magic", "rmi.magic",
FT_UINT32, BASE_HEX, NULL, 0x0,
"RMI Header Magic", HFILL }},
{ &hf_rmi_version,
{ "Version", "rmi.version",
FT_UINT16, BASE_DEC, NULL, 0x0,
"RMI Protocol Version", HFILL }},
{ &hf_rmi_protocol,
{ "Protocol","rmi.protocol",
FT_UINT8, BASE_HEX, VALS(rmi_protocol_str), 0x0,
"RMI Protocol Type", HFILL }},
{ &hf_rmi_inputmessage,
{ "Input Stream Message", "rmi.inputstream.message",
FT_UINT8, BASE_HEX, VALS(rmi_input_message_str), 0x0,
"RMI Inputstream Message Token", HFILL }},
{ &hf_rmi_outputmessage,
{ "Output Stream Message", "rmi.outputstream.message",
FT_UINT8, BASE_HEX, VALS(rmi_output_message_str), 0x0,
"RMI Outputstream Message token", HFILL }},
{ &hf_rmi_epid_length,
{ "Length", "rmi.endpoint_id.length",
FT_UINT16, BASE_DEC, NULL, 0x0,
"RMI Endpointidentifier Length", HFILL }},
{ &hf_rmi_epid_hostname,
{ "Hostname", "rmi.endpoint_id.hostname",
FT_STRING, BASE_NONE, NULL, 0x0,
"RMI Endpointidentifier Hostname", HFILL }},
{ &hf_rmi_epid_port,
{ "Port", "rmi.endpoint_id.port",
FT_UINT16, BASE_DEC, NULL, 0x0,
"RMI Endpointindentifier Port", HFILL }},
{ &hf_rmi_serialization_data,
{ "Serialization Data", "rmi.serialization_data",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_rmi_unique_identifier,
{ "UniqueIdentifier", "rmi.unique_identifier",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ser_magic,
{ "Magic", "rmi.ser.magic",
FT_UINT16, BASE_HEX, NULL, 0x0,
"Java Serialization Magic", HFILL }},
{ &hf_ser_version,
{ "Version", "rmi.ser.version",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Java Serialization Version", HFILL }},
};
static gint *ett[] = {
&ett_rmi,
&ett_rmi_magic,
&ett_rmi_version,
&ett_rmi_inputmessage,
&ett_rmi_outputmessage,
&ett_rmi_epid_length,
&ett_rmi_epid_hostname,
&ett_rmi_epid_port,
&ett_ser,
&ett_rmi_endpoint_identifier,
};
proto_rmi = proto_register_protocol("Java RMI", "RMI", "rmi");
proto_ser = proto_register_protocol("Java Serialization", "Serialization",
"serialization");
proto_register_field_array(proto_rmi, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_rmi(void)
{
dissector_handle_t rmi_handle;
rmi_handle = create_dissector_handle(dissect_rmi, proto_rmi);
dissector_add_uint_with_preference("tcp.port", TCP_PORT_RMI, rmi_handle);
}
/*
* 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:
*/
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