![Gilbert Ramirez](/assets/img/avatar_default.png)
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
565 lines
17 KiB
C
565 lines
17 KiB
C
/* packet-dccp.c
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* Routines for Distributed Checksum Clearinghouse packet dissection
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* DCC Home: http://www.rhyolite.com/anti-spam/dcc/
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*
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* Copyright 1999, Nathan Neulinger <nneul@umr.edu>
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-tftp.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <packet-dccp.h>
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static int proto_dccp = -1;
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static int hf_dccp_len = -1;
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static int hf_dccp_pkt_vers = -1;
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static int hf_dccp_op = -1;
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static int hf_dccp_clientid = -1;
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static int hf_dccp_opnums_host = -1;
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static int hf_dccp_opnums_pid = -1;
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static int hf_dccp_opnums_report = -1;
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static int hf_dccp_opnums_retrans = -1;
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static int hf_dccp_signature = -1;
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static int hf_dccp_max_pkt_vers = -1;
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static int hf_dccp_qdelay_ms = -1;
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static int hf_dccp_brand = -1;
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static int hf_dccp_ck_type = -1;
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static int hf_dccp_ck_len = -1;
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static int hf_dccp_ck_sum = -1;
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static int hf_dccp_date = -1;
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static int hf_dccp_target = -1;
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static int hf_dccp_adminop = -1;
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static int hf_dccp_adminval = -1;
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static int hf_dccp_floodop = -1;
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static int hf_dccp_trace = -1;
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static int hf_dccp_trace_admin = -1;
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static int hf_dccp_trace_anon = -1;
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static int hf_dccp_trace_client = -1;
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static int hf_dccp_trace_rlim = -1;
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static int hf_dccp_trace_query = -1;
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static int hf_dccp_trace_ridc = -1;
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static int hf_dccp_trace_flood = -1;
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static gint ett_dccp = -1;
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static gint ett_dccp_opnums = -1;
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static gint ett_dccp_op = -1;
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static gint ett_dccp_ck = -1;
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static gint ett_dccp_trace = -1;
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/* Utility macros */
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#define D_SIGNATURE() \
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proto_tree_add_item(dccp_optree, hf_dccp_signature, tvb, \
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offset, sizeof(DCC_SIGNATURE), FALSE); \
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offset += sizeof(DCC_SIGNATURE);
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#define D_LABEL(label,len) \
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proto_tree_add_text(dccp_optree, tvb, offset, len, label); \
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offset += len;
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#define D_TEXT(label, endpad) { \
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int next_offset,linelen,left; \
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const char *line; \
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while (tvb_offset_exists(tvb, offset+endpad)) { \
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left = tvb_length_remaining(tvb,offset) - endpad; \
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linelen = tvb_find_line_end(tvb, offset, left, &next_offset, \
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FALSE); \
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line = tvb_get_ptr(tvb, offset, linelen); \
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proto_tree_add_text(dccp_optree, tvb, offset, \
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next_offset - offset, "%s: %s", \
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label, tvb_format_text(tvb, offset, next_offset - offset)); \
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offset = next_offset; \
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} \
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}
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#define D_TARGET() \
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proto_tree_add_item_hidden(dccp_tree, hf_dccp_target, tvb, \
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offset, sizeof(DCC_TGTS), FALSE); \
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proto_tree_add_text(dccp_optree, tvb, offset, sizeof(DCC_TGTS), \
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val_to_str(tvb_get_ntohl(tvb,offset), dccp_target_vals, "Targets (%u)")); \
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offset += sizeof(DCC_TGTS); \
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#define D_DATE() { \
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nstime_t ts; \
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ts.nsecs = 0; \
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ts.secs = tvb_get_ntohl(tvb,offset); \
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proto_tree_add_time(dccp_optree, hf_dccp_date, tvb, offset, 4, &ts); \
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offset += 4; \
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}
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#define D_CHECKSUM() { \
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proto_tree *cktree, *ti; \
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ti = proto_tree_add_text(dccp_optree, tvb, offset, sizeof(DCC_CK), \
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"Checksum - %s", val_to_str(tvb_get_guint8(tvb,offset), \
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dccp_cktype_vals, \
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"Unknown Type: %u")); \
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cktree = proto_item_add_subtree(ti, ett_dccp_ck); \
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proto_tree_add_item(cktree, hf_dccp_ck_type, tvb, offset, 1, FALSE); \
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offset += 1; \
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proto_tree_add_item(cktree, hf_dccp_ck_len, tvb, offset, 1, FALSE); \
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offset += 1; \
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proto_tree_add_item(cktree, hf_dccp_ck_sum, tvb, offset, \
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sizeof(DCC_SUM), FALSE); \
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offset += sizeof(DCC_SUM); \
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}
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/* Lookup string tables */
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static const value_string dccp_op_vals[] = {
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{DCC_OP_INVALID, "Invalid Op"},
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{DCC_OP_NOP, "No-Op"},
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{DCC_OP_REPORT, "Report and Query"},
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{DCC_OP_QUERY, "Query"},
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{DCC_OP_QUERY_RESP, "Server Response"},
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{DCC_OP_ADMN, "Admin"},
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{DCC_OP_OK, "Ok"},
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{DCC_OP_ERROR, "Server Failing"},
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{DCC_OP_DELETE, "Delete Checksum(s)"},
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{0, NULL}
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};
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static const value_string dccp_cktype_vals[] = {
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{DCC_CK_INVALID, "Invalid/Deleted from DB when seen"},
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{DCC_CK_IP, "MD5 of binary source IPv6 address"},
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{DCC_CK_ENV_FROM, "MD5 of envelope Mail From value"},
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{DCC_CK_FROM, "MD5 of header From: line"},
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{DCC_CK_SUB, "MD5 of substitute header line"},
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{DCC_CK_MESSAGE_ID, "MD5 of header Message-ID: line"},
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{DCC_CK_RECEIVED, "MD5 of last header Received: line"},
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{DCC_CK_BODY, "MD5 of body"},
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{DCC_CK_FUZ1, "MD5 of filtered body - FUZ1"},
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{DCC_CK_FUZ2, "MD5 of filtered body - FUZ2"},
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{DCC_CK_FUZ3, "MD5 of filtered body - FUZ3"},
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{DCC_CK_FUZ4, "MD5 of filtered body - FUZ4"},
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{DCC_CK_SRVR_ID, "hostname for server-ID check "},
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{DCC_CK_ENV_TO, "MD5 of envelope Rcpt To value"},
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{0, NULL},
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};
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static const value_string dccp_adminop_vals[] = {
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{DCC_AOP_OK, "Never sent"},
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{DCC_AOP_STOP, "Stop Gracefully"},
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{DCC_AOP_NEW_IDS, "Load keys and client IDs"},
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{DCC_AOP_FLOD, "Flood control"},
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{DCC_AOP_DB_UNLOCK, "Start Switch to new database"},
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{DCC_AOP_DB_NEW, "Finish Switch to new database"},
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{DCC_AOP_STATS, "Return counters"},
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{DCC_AOP_STATS_CLEAR, "Return and zero counters"},
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{DCC_AOP_TRACE_ON, "Enable tracing"},
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{DCC_AOP_TRACE_OFF, "Disable tracing"},
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{DCC_AOP_CUR_CLIENTS, "List clients"},
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{0, NULL},
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};
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static const value_string dccp_target_vals[] = {
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{DCC_TGTS_TOO_MANY, "Targets (>= 16777200)"},
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{DCC_TGTS_OK, "Certified not spam"},
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{DCC_TGTS_OK2, "Half certified not spam"},
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{DCC_TGTS_DEL, "Deleted checksum"},
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{DCC_TGTS_INVALID, "Invalid"},
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{0, NULL},
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};
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static const value_string dccp_floodop_vals[] = {
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{DCC_AOP_FLOD_CHECK, "Check"},
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{DCC_AOP_FLOD_SHUTDOWN, "Shutdown"},
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{DCC_AOP_FLOD_HALT, "Halt"},
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{DCC_AOP_FLOD_RESUME, "Resume"},
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{DCC_AOP_FLOD_REWIND, "Rewind"},
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{DCC_AOP_FLOD_LIST, "List"},
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{DCC_AOP_FLOD_STATS, "Stats"},
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{DCC_AOP_FLOD_STATS_CLEAR, "Clear Stats"},
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{0,NULL},
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};
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static gboolean
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dissect_dccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *dccp_tree, *dccp_optree, *dccp_opnumtree, *ti;
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proto_tree *dccp_tracetree;
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int offset = 0;
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int client_is_le = 0;
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int op = 0;
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int i, is_response;
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if (pinfo->srcport != DCC_PORT && pinfo->destport != DCC_PORT) {
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/* Not the right port - not a DCC packet. */
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return FALSE;
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}
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/* get at least a full packet structure */
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if ( !tvb_bytes_exist(tvb, 0, sizeof(DCC_HDR)) ) {
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/* Doesn't have enough bytes to contain packet header. */
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return FALSE;
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}
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "DCCP");
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offset = 0;
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is_response = pinfo->srcport == DCC_PORT;
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"%s: %s",
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is_response ? "Response" : "Request",
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val_to_str(tvb_get_guint8(tvb, offset+3),
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dccp_op_vals, "Unknown Op: %u")
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);
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_dccp, tvb, offset, -1,
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FALSE);
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dccp_tree = proto_item_add_subtree(ti, ett_dccp);
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proto_tree_add_item(dccp_tree, hf_dccp_len, tvb,
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offset, 2, FALSE);
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if ( !tvb_bytes_exist(tvb, 0, tvb_get_ntohs(tvb, offset))) {
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/* Doesn't have number of bytes that header claims. */
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proto_tree_add_text(dccp_tree, tvb, offset, 2, "Error - packet is shorter than header claims!");
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}
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offset += 2;
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proto_tree_add_item(dccp_tree, hf_dccp_pkt_vers, tvb,
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offset, 1, FALSE);
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offset += 1;
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op = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(dccp_tree, hf_dccp_op, tvb,
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offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(dccp_tree, hf_dccp_clientid, tvb,
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offset, 4, FALSE);
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offset += 4;
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ti = proto_tree_add_text(dccp_tree, tvb, offset, -1, "Operation Numbers (Opaque to Server)");
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dccp_opnumtree = proto_item_add_subtree(ti, ett_dccp_opnums);
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/* Note - these are indeterminate - they are sortof considered opaque to the client */
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/* Make some attempt to figure out if this data is little endian, not guaranteed to be
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correct if connection went through a firewall or similar. */
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/* Very hokey check - if all three of pid/report/retrans look like little-endian
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numbers, host is probably little endian. Probably innacurate on super-heavily-used
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DCC clients though. This should be good enough for now. */
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client_is_le = ( (tvb_get_guint8(tvb, offset+4) | tvb_get_guint8(tvb, offset+4)) &&
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(tvb_get_guint8(tvb, offset+8) | tvb_get_guint8(tvb, offset+9)) &&
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(tvb_get_guint8(tvb, offset+12) | tvb_get_guint8(tvb, offset+13)) );
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proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_host, tvb,
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offset, 4, client_is_le);
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offset += 4;
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proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_pid, tvb,
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offset, 4, client_is_le);
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offset += 4;
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proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_report, tvb,
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offset, 4, client_is_le);
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offset += 4;
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proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_retrans, tvb,
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offset, 4, client_is_le);
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offset += 4;
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ti = proto_tree_add_text(dccp_tree, tvb, offset, -1, "Operation: %s",
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val_to_str(op, dccp_op_vals, "Unknown Op: %u"));
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dccp_optree = proto_item_add_subtree(ti, ett_dccp_op);
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switch(op) {
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case DCC_OP_NOP:
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D_SIGNATURE();
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break;
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case DCC_OP_REPORT:
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D_TARGET();
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for (i=0; i<=DCC_QUERY_MAX &&
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tvb_bytes_exist(tvb, offset+sizeof(DCC_SIGNATURE),1); i++)
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{
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D_CHECKSUM();
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}
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D_SIGNATURE();
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break;
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case DCC_OP_QUERY_RESP:
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for (i=0; i<=DCC_QUERY_MAX &&
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tvb_bytes_exist(tvb, offset+sizeof(DCC_SIGNATURE),1); i++)
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{
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D_TARGET();
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}
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D_SIGNATURE();
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break;
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case DCC_OP_ADMN:
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if ( is_response )
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{
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int left = tvb_length_remaining(tvb, offset) -
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sizeof(DCC_SIGNATURE);
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if ( left == sizeof(DCC_ADMN_RESP_CLIENTS) )
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{
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D_LABEL("Addr", 16);
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D_LABEL("Id", sizeof(DCC_CLNT_ID));
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D_LABEL("Last Used", 4);
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D_LABEL("Requests", 4);
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}
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else
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{
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D_TEXT("Response Text", sizeof(DCC_SIGNATURE));
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}
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D_SIGNATURE();
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}
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else
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{
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int aop;
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D_DATE();
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aop = tvb_get_guint8(tvb, offset+4);
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proto_tree_add_item(dccp_optree, hf_dccp_adminop, tvb, offset+4,
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1, FALSE);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
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val_to_str(tvb_get_guint8(tvb,offset+4),
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dccp_adminop_vals, "Unknown (%u)"));
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}
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if (aop == DCC_AOP_TRACE_ON || aop == DCC_AOP_TRACE_OFF )
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{
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ti = proto_tree_add_item(dccp_optree, hf_dccp_trace, tvb, offset,
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4, FALSE);
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dccp_tracetree = proto_item_add_subtree(ti, ett_dccp_trace);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_admin, tvb, offset, 4, FALSE);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_anon, tvb, offset, 4, FALSE);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_client, tvb, offset, 4, FALSE);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_rlim, tvb, offset, 4, FALSE);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_query, tvb, offset, 4, FALSE);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_ridc, tvb, offset, 4, FALSE);
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proto_tree_add_item(dccp_tracetree, hf_dccp_trace_flood, tvb, offset, 4, FALSE);
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}
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else if ( aop == DCC_AOP_FLOD )
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{
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proto_tree_add_item(dccp_optree, hf_dccp_floodop,
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tvb, offset, 4, FALSE);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
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val_to_str(tvb_get_ntohl(tvb,offset),
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dccp_floodop_vals, "Unknown (%u)"));
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}
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}
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else
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{
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proto_tree_add_item(dccp_optree, hf_dccp_adminval,
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tvb, offset, 4, FALSE);
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}
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offset += 4;
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offset += 1; /* admin op we did in reverse order */
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D_LABEL("Pad", 3);
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D_SIGNATURE();
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}
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break;
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case DCC_OP_OK:
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proto_tree_add_item(dccp_optree, hf_dccp_max_pkt_vers, tvb,
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offset, 1, FALSE);
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offset += 1;
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D_LABEL("Unused", 1);
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proto_tree_add_item(dccp_optree, hf_dccp_qdelay_ms, tvb,
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offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(dccp_optree, hf_dccp_brand, tvb,
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offset, sizeof(DCC_BRAND), FALSE);
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offset += sizeof(DCC_BRAND);
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D_SIGNATURE();
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break;
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default:
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/* do nothing */
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break;
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}
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}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
proto_register_dccp(void)
|
|
{
|
|
static hf_register_info hf[] = {
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|
{ &hf_dccp_len, {
|
|
"Packet Length", "dccp.len", FT_UINT16, BASE_DEC,
|
|
NULL, 0, "Packet Length", HFILL }},
|
|
|
|
{ &hf_dccp_pkt_vers, {
|
|
"Packet Version", "dccp.pkt_vers", FT_UINT16, BASE_DEC,
|
|
NULL, 0, "Packet Version", HFILL }},
|
|
|
|
{ &hf_dccp_op, {
|
|
"Operation Type", "dccp.op", FT_UINT8, BASE_DEC,
|
|
VALS(dccp_op_vals), 0, "Operation Type", HFILL }},
|
|
|
|
{ &hf_dccp_clientid, {
|
|
"Client ID", "dccp.clientid", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "Client ID", HFILL }},
|
|
|
|
{ &hf_dccp_opnums_host, {
|
|
"Host", "dccp.opnums.host", FT_IPv4, BASE_DEC,
|
|
NULL, 0, "Host", HFILL }},
|
|
|
|
{ &hf_dccp_opnums_pid, {
|
|
"Process ID", "dccp.opnums.pid", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "Process ID", HFILL }},
|
|
|
|
{ &hf_dccp_opnums_report, {
|
|
"Report", "dccp.opnums.report", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "Report", HFILL }},
|
|
|
|
{ &hf_dccp_opnums_retrans, {
|
|
"Retransmission", "dccp.opnums.retrans", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "Retransmission", HFILL }},
|
|
|
|
{ &hf_dccp_signature, {
|
|
"Signature", "dccp.signature", FT_BYTES, BASE_HEX,
|
|
NULL, 0, "Signature", HFILL }},
|
|
|
|
{ &hf_dccp_max_pkt_vers, {
|
|
"Maximum Packet Version", "dccp.max_pkt_vers", FT_UINT8, BASE_DEC,
|
|
NULL, 0, "Maximum Packet Version", HFILL }},
|
|
|
|
{ &hf_dccp_qdelay_ms, {
|
|
"Client Delay", "dccp.qdelay_ms", FT_UINT16, BASE_DEC,
|
|
NULL, 0, "Client Delay", HFILL }},
|
|
|
|
{ &hf_dccp_brand, {
|
|
"Server Brand", "dccp.brand", FT_STRING, BASE_DEC,
|
|
NULL, 0, "Server Brand", HFILL }},
|
|
|
|
{ &hf_dccp_ck_type, {
|
|
"Type", "dccp.checksum.type", FT_UINT8, BASE_DEC,
|
|
VALS(dccp_cktype_vals), 0, "Checksum Type", HFILL }},
|
|
|
|
{ &hf_dccp_ck_len, {
|
|
"Length", "dccp.checksum.length", FT_UINT8, BASE_DEC,
|
|
NULL, 0, "Checksum Length", HFILL }},
|
|
|
|
{ &hf_dccp_ck_sum, {
|
|
"Sum", "dccp.checksum.sum", FT_BYTES, BASE_HEX,
|
|
NULL, 0, "Checksum", HFILL }},
|
|
|
|
{ &hf_dccp_target, {
|
|
"Target", "dccp.target", FT_UINT32, BASE_HEX,
|
|
NULL, 0, "Target", HFILL }},
|
|
|
|
{ &hf_dccp_date, {
|
|
"Date", "dccp.date", FT_ABSOLUTE_TIME, BASE_DEC,
|
|
NULL, 0, "Date", HFILL }},
|
|
|
|
{ &hf_dccp_adminop, {
|
|
"Admin Op", "dccp.adminop", FT_UINT8, BASE_DEC,
|
|
VALS(dccp_adminop_vals), 0, "Admin Op", HFILL }},
|
|
|
|
{ &hf_dccp_adminval, {
|
|
"Admin Value", "dccp.adminval", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "Admin Value", HFILL }},
|
|
|
|
{ &hf_dccp_trace, {
|
|
"Trace Bits", "dccp.trace", FT_UINT32, BASE_HEX,
|
|
NULL, 0, "Trace Bits", HFILL }},
|
|
|
|
{ &hf_dccp_trace_admin, {
|
|
"Admin Requests", "dccp.trace.admin", FT_BOOLEAN, 32,
|
|
NULL, 0x00000001, "Admin Requests", HFILL }},
|
|
|
|
{ &hf_dccp_trace_anon, {
|
|
"Anonymous Requests", "dccp.trace.anon", FT_BOOLEAN, 32,
|
|
NULL, 0x00000002, "Anonymous Requests", HFILL }},
|
|
|
|
{ &hf_dccp_trace_client, {
|
|
"Authenticated Client Requests", "dccp.trace.client", FT_BOOLEAN, 32,
|
|
NULL, 0x00000004, "Authenticated Client Requests", HFILL }},
|
|
|
|
{ &hf_dccp_trace_rlim, {
|
|
"Rate-Limited Requests", "dccp.trace.rlim", FT_BOOLEAN, 32,
|
|
NULL, 0x00000008, "Rate-Limited Requests", HFILL }},
|
|
|
|
{ &hf_dccp_trace_query, {
|
|
"Queries and Reports", "dccp.trace.query", FT_BOOLEAN, 32,
|
|
NULL, 0x00000010, "Queries and Reports", HFILL }},
|
|
|
|
{ &hf_dccp_trace_ridc, {
|
|
"RID Cache Messages", "dccp.trace.ridc", FT_BOOLEAN, 32,
|
|
NULL, 0x00000020, "RID Cache Messages", HFILL }},
|
|
|
|
{ &hf_dccp_trace_flood, {
|
|
"Input/Output Flooding", "dccp.trace.flood", FT_BOOLEAN, 32,
|
|
NULL, 0x00000040, "Input/Output Flooding", HFILL }},
|
|
|
|
{ &hf_dccp_floodop, {
|
|
"Flood Control Operation", "dccp.floodop", FT_UINT32, BASE_DEC,
|
|
VALS(dccp_floodop_vals), 0, "Flood Control Operation", HFILL }},
|
|
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_dccp,
|
|
&ett_dccp_op,
|
|
&ett_dccp_ck,
|
|
&ett_dccp_opnums,
|
|
&ett_dccp_trace,
|
|
};
|
|
|
|
proto_dccp = proto_register_protocol("Distributed Checksum Clearinghouse Protocol",
|
|
"DCCP", "dccp");
|
|
|
|
proto_register_field_array(proto_dccp, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_dccp(void)
|
|
{
|
|
heur_dissector_add("udp", dissect_dccp, proto_dccp);
|
|
}
|