379 lines
13 KiB
C
379 lines
13 KiB
C
/* packet-rmi.c
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* Routines for java rmiregistry dissection
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* Copyright 2002, Michael Stiller <ms@2scale.net>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include "packet-rmi.h"
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void proto_register_rmi(void);
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void proto_reg_handoff_rmi(void);
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static void
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dissect_ser(tvbuff_t *tvb, proto_tree *tree);
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static rmi_type
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get_rmi_type(tvbuff_t *tvb, gint offset, int datalen);
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/* Initialize the protocol and registered fields */
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static int proto_rmi = -1;
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static int proto_ser = -1;
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static int hf_rmi_magic = -1;
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static int hf_rmi_version = -1;
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static int hf_rmi_protocol = -1;
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static int hf_rmi_inputmessage = -1;
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static int hf_rmi_outputmessage = -1;
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static int hf_rmi_epid_length = -1;
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static int hf_rmi_epid_hostname = -1;
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static int hf_rmi_epid_port = -1;
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static int hf_rmi_serialization_data = -1;
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static int hf_rmi_unique_identifier = -1;
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static int hf_ser_magic = -1;
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static int hf_ser_version = -1;
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/* Initialize the subtree pointers */
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static gint ett_rmi = -1;
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static gint ett_rmi_magic = -1;
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static gint ett_rmi_version = -1;
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static gint ett_rmi_inputmessage = -1;
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static gint ett_rmi_outputmessage = -1;
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static gint ett_rmi_epid_length = -1;
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static gint ett_rmi_epid_hostname = -1;
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static gint ett_rmi_epid_port = -1;
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static gint ett_rmi_endpoint_identifier = -1;
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static gint ett_ser = -1;
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/*
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* See
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*
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* http://java.sun.com/products/jdk/1.2/docs/guide/rmi/spec/rmi-protocol.doc1.html
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*
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* for RMI, and
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*
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* http://java.sun.com/products/jdk/1.2/docs/guide/serialization/spec/protocol.doc.html
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*
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* for the serialization protocol.
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*/
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#define TCP_PORT_RMI 1099
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static const value_string rmi_protocol_str[] = {
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{RMI_OUTPUTSTREAM_PROTOCOL_STREAM, "StreamProtocol"},
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{RMI_OUTPUTSTREAM_PROTOCOL_SINGLEOP, "SingleOpProtocol"},
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{RMI_OUTPUTSTREAM_PROTOCOL_MULTIPLEX, "MultiPlexProtocol"},
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{0, NULL}
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};
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static const value_string rmi_output_message_str[] = {
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{RMI_OUTPUTSTREAM_MESSAGE_CALL, "Call"},
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{RMI_OUTPUTSTREAM_MESSAGE_PING, "Ping"},
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{RMI_OUTPUTSTREAM_MESSAGE_DGCACK, "DgcAck"},
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{0, NULL}
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};
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static const value_string rmi_input_message_str[] = {
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{RMI_INPUTSTREAM_MESSAGE_ACK, "ProtocolAck"},
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{RMI_INPUTSTREAM_MESSAGE_NOTSUPPORTED, "ProtocolNotSupported"},
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{RMI_INPUTSTREAM_MESSAGE_RETURNDATA, "ReturnData"},
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{RMI_INPUTSTREAM_MESSAGE_PINGACK, "PingAck"},
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{0, NULL}
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};
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static int
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dissect_rmi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_item *ti;
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proto_tree *rmi_tree;
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tvbuff_t *next_tvb;
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gint offset = 0;
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gint next_offset;
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int datalen;
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guint16 version, len, port;
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guint8 message, proto;
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rmi_type rmitype;
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/* Make entries in Protocol column and Info column on summary display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "RMI");
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datalen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
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rmitype = get_rmi_type(tvb, offset, datalen);
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switch(rmitype) {
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case RMI_OUTPUTSTREAM:
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version = tvb_get_ntohs(tvb,4);
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"JRMI, Version: %d, ", version);
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proto = tvb_get_guint8(tvb, 6);
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col_append_str(pinfo->cinfo, COL_INFO,
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val_to_str_const(proto, rmi_protocol_str,
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"Unknown protocol"));
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break;
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case RMI_OUTPUTMESSAGE:
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message = tvb_get_guint8(tvb,0);
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col_set_str(pinfo->cinfo, COL_INFO,
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"JRMI, ");
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col_append_str(pinfo->cinfo, COL_INFO,
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val_to_str_const(message, rmi_output_message_str,
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"Unknown message"));
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break;
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case RMI_INPUTSTREAM:
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message = tvb_get_guint8(tvb,0);
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col_set_str(pinfo->cinfo, COL_INFO,
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"JRMI, ");
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col_append_str(pinfo->cinfo, COL_INFO,
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val_to_str_const(message, rmi_input_message_str,
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"Unknown message"));
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break;
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case SERIALIZATION_DATA:
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version = tvb_get_ntohs(tvb,2);
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"Serialization data, Version: %d", version);
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break;
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default:
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col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
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break;
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_rmi, tvb, 0, -1, ENC_NA);
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rmi_tree = proto_item_add_subtree(ti, ett_rmi);
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switch(rmitype) {
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case RMI_OUTPUTSTREAM:
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/* XXX - uint, or string? */
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proto_tree_add_item(rmi_tree, hf_rmi_magic,
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tvb, offset, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(rmi_tree, hf_rmi_version,
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tvb, offset + 4, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(rmi_tree, hf_rmi_protocol,
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tvb, offset + 6, 1, ENC_BIG_ENDIAN);
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break;
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case RMI_INPUTSTREAM:
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message = tvb_get_guint8(tvb, 0);
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proto_tree_add_uint(rmi_tree, hf_rmi_inputmessage,
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tvb, offset, 1, message);
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if(message == RMI_INPUTSTREAM_MESSAGE_ACK) {
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proto_tree* endpoint_tree = proto_tree_add_subtree(rmi_tree, tvb, offset + 1, -1,
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ett_rmi_endpoint_identifier, NULL, "EndPointIdentifier");
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/* MESSAGE_ACK should include EndpointIdentifier */
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len = tvb_get_ntohs(tvb, 1);
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proto_tree_add_uint(endpoint_tree, hf_rmi_epid_length,
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tvb, offset + 1, 2, len);
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if (len > 0) {
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proto_tree_add_item(endpoint_tree, hf_rmi_epid_hostname,
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tvb, offset + 3, len, ENC_ASCII|ENC_NA);
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} else {
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proto_tree_add_string(endpoint_tree, hf_rmi_epid_hostname,
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tvb, offset + 3, len, "[Empty]");
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}
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port = tvb_get_ntohs(tvb, offset + len + 5);
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proto_tree_add_uint(endpoint_tree, hf_rmi_epid_port,
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tvb, offset + len + 5, 2, port);
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}
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if(message == RMI_INPUTSTREAM_MESSAGE_RETURNDATA) {
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proto_tree_add_bytes_format(rmi_tree, hf_rmi_serialization_data, tvb, offset + 1, -1,
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NULL, "Serialization Data");
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next_tvb = tvb_new_subset_remaining(tvb, offset + 1);
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dissect_ser(next_tvb, tree);
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}
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break;
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case RMI_OUTPUTMESSAGE:
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message = tvb_get_guint8(tvb, 0);
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proto_tree_add_uint(rmi_tree, hf_rmi_outputmessage,
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tvb, offset, 1, message);
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if(message == RMI_OUTPUTSTREAM_MESSAGE_CALL) {
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proto_tree_add_bytes_format(rmi_tree, hf_rmi_serialization_data, tvb, offset + 1, -1,
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NULL, "Serialization Data");
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/* XXX */
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next_tvb = tvb_new_subset_remaining(tvb, offset + 1);
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dissect_ser(next_tvb, tree);
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}
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if(message == RMI_OUTPUTSTREAM_MESSAGE_DGCACK) {
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proto_tree_add_item(rmi_tree, hf_rmi_unique_identifier, tvb, offset + 1, -1, ENC_NA);
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}
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break;
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case SERIALIZATION_DATA:
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dissect_ser(tvb, tree);
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break;
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default:
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break;
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}
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}
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return tvb_captured_length(tvb);
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}
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static void
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dissect_ser(tvbuff_t *tvb, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *ser_tree;
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gint offset;
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offset = 0;
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if(tree) {
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ti = proto_tree_add_item(tree, proto_ser, tvb, 0, -1, ENC_NA);
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ser_tree = proto_item_add_subtree(ti, ett_ser);
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proto_tree_add_item(ser_tree, hf_ser_magic,
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tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(ser_tree, hf_ser_version,
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tvb, offset + 2, 2, ENC_BIG_ENDIAN);
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}
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}
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static rmi_type
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get_rmi_type(tvbuff_t *tvb, gint offset, int datalen)
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{
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guint16 ser_magic;
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guchar data[4];
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tvb_memcpy(tvb, data, offset, (datalen > 4) ? 4 : datalen);
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if (datalen >= 2) {
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ser_magic = data[0] << 8 | data[1];
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if (ser_magic == SER_STREAM_MAGIC) {
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return SERIALIZATION_DATA;
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}
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}
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if (datalen >= 4) {
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if(strncmp(data, RMI_MAGIC, 4) == 0) {
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return RMI_OUTPUTSTREAM;
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}
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}
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if (datalen >= 1) {
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if (data[0] == RMI_INPUTSTREAM_MESSAGE_ACK ||
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data[0] == RMI_INPUTSTREAM_MESSAGE_NOTSUPPORTED ||
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data[0] == RMI_INPUTSTREAM_MESSAGE_RETURNDATA ||
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data[0] == RMI_INPUTSTREAM_MESSAGE_PINGACK) {
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return RMI_INPUTSTREAM;
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}
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}
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if (datalen >= 1) {
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if (data[0] == RMI_OUTPUTSTREAM_MESSAGE_CALL ||
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data[0] == RMI_OUTPUTSTREAM_MESSAGE_PING ||
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data[0] == RMI_OUTPUTSTREAM_MESSAGE_DGCACK) {
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return RMI_OUTPUTMESSAGE;
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}
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}
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return CONTINUATION;
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}
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void
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proto_register_rmi(void)
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{
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static hf_register_info hf[] = {
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{ &hf_rmi_magic,
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{ "Magic", "rmi.magic",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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"RMI Header Magic", HFILL }},
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{ &hf_rmi_version,
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{ "Version", "rmi.version",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"RMI Protocol Version", HFILL }},
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{ &hf_rmi_protocol,
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{ "Protocol","rmi.protocol",
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FT_UINT8, BASE_HEX, VALS(rmi_protocol_str), 0x0,
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"RMI Protocol Type", HFILL }},
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{ &hf_rmi_inputmessage,
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{ "Input Stream Message", "rmi.inputstream.message",
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FT_UINT8, BASE_HEX, VALS(rmi_input_message_str), 0x0,
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"RMI Inputstream Message Token", HFILL }},
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{ &hf_rmi_outputmessage,
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{ "Output Stream Message", "rmi.outputstream.message",
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FT_UINT8, BASE_HEX, VALS(rmi_output_message_str), 0x0,
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"RMI Outputstream Message token", HFILL }},
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{ &hf_rmi_epid_length,
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{ "Length", "rmi.endpoint_id.length",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"RMI Endpointidentifier Length", HFILL }},
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{ &hf_rmi_epid_hostname,
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{ "Hostname", "rmi.endpoint_id.hostname",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"RMI Endpointidentifier Hostname", HFILL }},
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{ &hf_rmi_epid_port,
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{ "Port", "rmi.endpoint_id.port",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"RMI Endpointindentifier Port", HFILL }},
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{ &hf_rmi_serialization_data,
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{ "Serialization Data", "rmi.serialization_data",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_rmi_unique_identifier,
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{ "UniqueIdentifier", "rmi.unique_identifier",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_ser_magic,
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{ "Magic", "rmi.ser.magic",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"Java Serialization Magic", HFILL }},
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{ &hf_ser_version,
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{ "Version", "rmi.ser.version",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"Java Serialization Version", HFILL }},
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};
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static gint *ett[] = {
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&ett_rmi,
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&ett_rmi_magic,
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&ett_rmi_version,
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&ett_rmi_inputmessage,
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&ett_rmi_outputmessage,
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&ett_rmi_epid_length,
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&ett_rmi_epid_hostname,
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&ett_rmi_epid_port,
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&ett_ser,
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&ett_rmi_endpoint_identifier,
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};
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proto_rmi = proto_register_protocol("Java RMI", "RMI", "rmi");
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proto_ser = proto_register_protocol_in_name_only("Java Serialization", "Serialization",
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"serialization", proto_rmi, FT_PROTOCOL);
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proto_register_field_array(proto_rmi, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_rmi(void)
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{
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dissector_handle_t rmi_handle;
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rmi_handle = create_dissector_handle(dissect_rmi, proto_rmi);
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dissector_add_uint_with_preference("tcp.port", TCP_PORT_RMI, rmi_handle);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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