forked from osmocom/wireshark
1358 lines
33 KiB
C
1358 lines
33 KiB
C
/* packet-msproxy.c
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* Routines for Microsoft Proxy packet dissection
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* Copyright 2000, Jeffrey C. Foster <jfoste@woodward.com>
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*
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* $Id: packet-msproxy.c,v 1.14 2000/11/19 08:54:00 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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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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*
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* This was derived from the dante socks implimentation source code.
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* Most of the information came from common.h and msproxy_clientprotocol.c
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*
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* See http://www.inet.no/dante for more information
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*
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*/
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/************************************************************************
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* *
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* Notes: These are possible command values. User input is welcome *
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* *
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* Command = 0x040a - Remote host closed connection (maybe ?? ) *
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* Command = 0x0411 - Remote host closed connection *
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* Command = 0x0413 - Local host closed connection or SYN worked *
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* *
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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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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.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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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include "packet.h"
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#include "resolv.h"
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#include "globals.h"
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#include "alignment.h"
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#include "conversation.h"
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#include "packet-tcp.h"
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#include "packet-udp.h"
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#define CHECK_PACKET_LENGTH(X) if (!BYTES_ARE_IN_FRAME(offset, X)){ \
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proto_tree_add_text(tree, NullTVB, offset, 0, "****FRAME TOO SHORT***"); return;}
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extern void udp_hash_add(guint16 proto,
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void (*dissect)(const u_char *, int, frame_data *, proto_tree *));
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static int proto_msproxy = -1;
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static int ett_msproxy = -1;
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static int ett_msproxy_name = -1;
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static int hf_msproxy_cmd = -1;
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static int hf_msproxy_clntport = -1;
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static int hf_msproxy_dstaddr = -1;
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static int hf_msproxy_srcport = -1;
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static int hf_msproxy_dstport = -1;
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static int hf_msproxy_serverport = -1;
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static int hf_msproxy_serveraddr = -1;
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static int hf_msproxy_bindport = -1;
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static int hf_msproxy_bindaddr = -1;
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static int hf_msproxy_boundport = -1;
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static int hf_msproxy_bind_id = -1;
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static int hf_msproxy_resolvaddr = -1;
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static int hf_msproxy_server_int_addr = -1;
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static int hf_msproxy_server_int_port = -1;
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static int hf_msproxy_server_ext_addr = -1;
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static int hf_msproxy_server_ext_port = -1;
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#define UDP_PORT_MSPROXY 1745
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#define N_MSPROXY_HELLO 0x05 /* packet 1 from client */
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#define N_MSPROXY_ACK 0x10 /* packet 1 from server */
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#define N_MSPROXY_USERINFO_ACK 0x04 /* packet 2 from server */
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#define N_MSPROXY_AUTH 0x47 /* packet 3 from client */
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#define N_MSPROXY_RESOLVE 0x07 /* Resolve request */
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/*$$$ 0x0500 was dante value, I see 0x05ff and 0x0500 */
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#define MSPROXY_HELLO 0x0500
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#define MSPROXY_HELLO_2 0x05ff
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#define MSPROXY_HELLO_ACK 0x1000
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#define MSPROXY_USERINFO 0x1000
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#define MSPROXY_USERINFO_ACK 0x0400
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#define MSPROXY_AUTH 0x4700
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#define MSPROXY_AUTH_1_ACK 0x4714
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#define MSPROXY_AUTH_2 0x4701
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#define MSPROXY_AUTH_2_ACK 0x4715
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#define MSPROXY_AUTH_2_ACK2 0x4716
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#define MSPROXY_RESOLVE 0x070d
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#define MSPROXY_RESOLVE_ACK 0x070f
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#define MSPROXY_BIND 0x0704
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#define MSPROXY_BIND_ACK 0x0706
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#define MSPROXY_TCP_BIND 0x0707
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#define MSPROXY_TCP_BIND_ACK 0x0708
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#define MSPROXY_LISTEN 0x0406
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#define MSPROXY_BINDINFO 0x0709
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#define MSPROXY_BINDINFO_ACK 0x070a
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#define MSPROXY_CONNECT 0x071e
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#define MSPROXY_CONNECT_ACK 0x0703
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#define MSPROXY_UDPASSOCIATE 0x0705
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#define MSPROXY_UDPASSOCIATE_ACK 0x0706
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#define MSPROXY_UDP_BIND_REQ 0x070b
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#define MSPROXY_CONNECTED 0x042c
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#define MSPROXY_SESSIONEND 0x251e
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#define MSPROXY_BIND_AUTHFAILED 0x0804
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#define MSPROXY_CONNECT_AUTHFAILED 0x081e
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#define MSPROXY_CONNREFUSED 0x4 /* low 12 bits seem to vary. */
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#define FROM_SERVER 1 /* direction of packet data for get_msproxy_cmd_name */
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#define FROM_CLIENT 0
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/*$$$ should this be the same as redirect_entry_t ?? */
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/* then the add_conversation could just copy the structure */
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/* using the same allocation (instance for you object guys) */
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/* wouldn't work because there may be multiple child conversations */
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/* from the same MSProxy conversation */
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typedef struct {
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guint32 dst_addr;
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guint32 clnt_port;
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guint32 dst_port;
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guint32 server_int_port;
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int proto;
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}hash_entry_t;
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/************** conversation hash stuff ***************/
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#define hash_init_count 20
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#define hash_val_length (sizeof(hash_entry_t))
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static GMemChunk *vals = NULL;
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typedef struct {
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guint32 remote_addr;
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guint32 clnt_port;
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guint32 server_int_port;
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guint32 remote_port;
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int proto;
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}redirect_entry_t;
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/************** negotiated conversation hash stuff ***************/
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#define redirect_init_count 20
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#define redirect_val_length (sizeof(redirect_entry_t))
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static GMemChunk *redirect_vals = NULL;
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static guint32 last_row= 0; /* used to see if packet is new */
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static void msproxy_sub_dissector( const u_char *pd, int offset, frame_data *fd,
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proto_tree *tree) {
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/* Conversation dissector called from TCP or UDP dissector. Decode and */
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/* display the socks header, the pass the rest of the data to the tcp */
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/* or udp port decode routine to handle the payload. */
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guint32 *ptr;
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redirect_entry_t *redirect_info;
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conversation_t *conversation;
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proto_tree *msp_tree;
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proto_item *ti;
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tvbuff_t *tvb;
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conversation = find_conversation( &pi.src, &pi.dst, pi.ptype,
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pi.srcport, pi.destport, 0);
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g_assert( conversation); /* should always find a conversation */
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redirect_info = (redirect_entry_t*)conversation->data;
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if (check_col(fd, COL_PROTOCOL))
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col_set_str(fd, COL_PROTOCOL, "MS Proxy");
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if (check_col(fd, COL_INFO))
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col_add_fstr(fd, COL_INFO, "%s",
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(( redirect_info->proto == PT_TCP) ? "TCP stream" :
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"UDP packets"));
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if ( tree) {
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ti = proto_tree_add_item( tree, proto_msproxy, NullTVB, offset, 0,
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FALSE );
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msp_tree = proto_item_add_subtree(ti, ett_msproxy);
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proto_tree_add_uint( msp_tree, hf_msproxy_dstport, NullTVB,
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offset, 0, redirect_info->remote_port);
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proto_tree_add_ipv4( msp_tree, hf_msproxy_dstaddr, NullTVB, offset, 0,
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redirect_info->remote_addr);
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}
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/* set pi src/dst port and call the udp sub-dissector lookup */
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if ( pi.srcport == redirect_info->clnt_port)
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ptr = &pi.destport;
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else
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ptr = &pi.srcport;
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*ptr = redirect_info->remote_port;
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tvb = tvb_create_from_top(0);
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if ( redirect_info->proto == PT_TCP)
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decode_tcp_ports( tvb, offset, &pi, tree, pi.srcport, pi.destport);
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else
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decode_udp_ports( tvb, offset, &pi, tree, pi.srcport, pi.destport);
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*ptr = redirect_info->server_int_port;
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}
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static void add_msproxy_conversation( hash_entry_t *hash_info){
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/* check to see if a conversation already exists, if it does assume */
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/* it's our conversation and quit. Otherwise create a new conversation. */
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/* Load the conversation dissector to our dissector and load the */
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/* conversation data structure with the info needed to call the TCP or */
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/* UDP port decoder. */
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/* NOTE: Currently this assume that the conversation will be created */
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/* during a packet from the server. If that changes, the pi.src */
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/* and pi.dst will not be correct and this routine will have to */
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/* change. */
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redirect_entry_t *new_conv_info;
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conversation_t *conversation = find_conversation( &pi.src, &pi.dst,
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hash_info->proto, hash_info->server_int_port,
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hash_info->clnt_port, 0);
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if ( conversation)
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return;
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new_conv_info = g_mem_chunk_alloc(redirect_vals);
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conversation = conversation_new( &pi.src, &pi.dst, hash_info->proto,
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hash_info->server_int_port, hash_info->clnt_port,
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new_conv_info, 0);
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g_assert( new_conv_info);
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g_assert( conversation);
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new_conv_info->remote_addr = hash_info->dst_addr;
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new_conv_info->clnt_port = hash_info->clnt_port;
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new_conv_info->remote_port = hash_info->dst_port;
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new_conv_info->server_int_port = hash_info->server_int_port;
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new_conv_info->proto = hash_info->proto;
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old_conversation_set_dissector(conversation, msproxy_sub_dissector);
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}
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static int display_application_name(const u_char *pd, int offset,
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frame_data *fd, proto_tree *tree) {
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/* display the application name in the proto tree. */
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/* NOTE: this routine assumes that the tree pointer is valid (not NULL) */
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char temp[255];
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if (!IS_DATA_IN_FRAME(offset)){
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proto_tree_add_text(tree, NullTVB, offset, 0, "****FRAME TOO SHORT***");
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return 0;
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}
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strncpy( temp, &pd[ offset], MIN( 255, END_OF_FRAME));
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temp[ MIN( 255, END_OF_FRAME)] = 0;
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proto_tree_add_text( tree, NullTVB, offset, strlen(temp), "Application: %s", temp);
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return strlen(temp);
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}
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static char *get_msproxy_cmd_name( int cmd, int direction) {
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/* return the command name string for cmd */
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switch (cmd){
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case MSPROXY_HELLO_2:
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case MSPROXY_HELLO: return "Hello";
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/* MSPROXY_HELLO_ACK & MSPROXY_USERINFO have the same value (0x1000). */
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/* So use the direction flag to determine which to use. */
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case MSPROXY_USERINFO:
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if ( direction == FROM_SERVER)
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return "Hello Acknowledge";
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else
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return "User Info";
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case MSPROXY_USERINFO_ACK: return "User Info Acknowledge";
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case MSPROXY_AUTH: return "Authentication";
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case MSPROXY_AUTH_1_ACK: return "Authentication Acknowledge";
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case MSPROXY_AUTH_2: return "Authentication 2";
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case MSPROXY_AUTH_2_ACK: return "Authentication 2 Acknowledge";
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case MSPROXY_RESOLVE: return "Resolve";
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case MSPROXY_RESOLVE_ACK: return "Resolve Acknowledge";
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case MSPROXY_BIND: return "Bind";
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case MSPROXY_TCP_BIND: return "TCP Bind";
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case MSPROXY_TCP_BIND_ACK: return "TCP Bind Acknowledge";
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case MSPROXY_LISTEN: return "Listen";
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case MSPROXY_BINDINFO: return "Bind Info";
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case MSPROXY_BINDINFO_ACK: return "Bind Info Acknowledge";
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case MSPROXY_CONNECT: return "Connect";
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case MSPROXY_CONNECT_ACK: return "Connect Acknowledge";
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case MSPROXY_UDPASSOCIATE: return "UDP Associate";
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case MSPROXY_UDP_BIND_REQ: return "UDP Bind";
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case MSPROXY_UDPASSOCIATE_ACK: return "Bind or Associate Acknowledge";
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case MSPROXY_CONNECTED: return "Connected";
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case MSPROXY_SESSIONEND: return "Session End";
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default: return "Unknown";
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}
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}
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static void dissect_user_info_2(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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/* decode the user, application, computer name */
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char str[ 255];
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if ( tree) {
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strncpy( str, &pd[ offset], MIN( 255, END_OF_FRAME));
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str[ MIN( 255, END_OF_FRAME)] = 0;
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proto_tree_add_text( tree, NullTVB, offset, strlen( str) + 1,
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"User name: %s", str);
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offset += strlen( str) + 2;
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strncpy( str, &pd[ offset], MIN( 255, END_OF_FRAME));
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str[ MIN( 255, END_OF_FRAME)] = 0;
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proto_tree_add_text( tree, NullTVB, offset, strlen( str) + 1,
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"Application name: %s", str);
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offset += strlen( str) + 1;
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strncpy( str, &pd[ offset], MIN( 255, END_OF_FRAME));
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str[ MIN( 255, END_OF_FRAME)] = 0;
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proto_tree_add_text( tree, NullTVB, offset, strlen( str) + 1,
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"Client computer name: %s", str);
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}
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}
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static void dissect_msproxy_request_1(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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/* decode the request _1 structure */
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offset += 180;
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dissect_user_info_2( pd, 262, fd, tree);
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}
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static void dissect_bind(const u_char *pd, int offset, frame_data *fd,
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proto_tree *tree, hash_entry_t *conv_info) {
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/* decode the bind request */
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offset += 18;
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CHECK_PACKET_LENGTH( 4);
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if ( tree)
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proto_tree_add_ipv4( tree, hf_msproxy_bindaddr, NullTVB, offset, 4,
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GWORD( pd, offset));
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offset += 4;
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CHECK_PACKET_LENGTH( 2);
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if ( tree)
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proto_tree_add_uint( tree, hf_msproxy_bindport, NullTVB, offset, 2,
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pntohs( &pd[ offset]));
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offset += 6;
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CHECK_PACKET_LENGTH( 2);
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if ( tree)
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proto_tree_add_uint( tree, hf_msproxy_clntport, NullTVB, offset, 2,
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pntohs( &pd[ offset]));
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offset += 2;
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conv_info->clnt_port = pntohs( &pd[ offset]);
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offset += 6;
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if ( tree){
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CHECK_PACKET_LENGTH( 2);
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proto_tree_add_uint( tree, hf_msproxy_boundport, NullTVB, offset, 2,
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pntohs( &pd[ offset]));
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offset += 82;
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display_application_name( pd, offset, fd, tree);
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}
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}
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static void dissect_auth(const u_char *pd, int offset,
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frame_data *fd, proto_tree *tree) {
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/* decode the authorization request */
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char temp[255];
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if ( tree) {
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offset += 134;
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strncpy( temp, &pd[ offset], 7);
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temp[ 7] = 0;
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proto_tree_add_text( tree, NullTVB, offset, 7, "NTLMSSP signature: %s",
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temp);
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offset += 7;
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}
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}
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static void dissect_tcp_bind(const u_char *pd, int offset,
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frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
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/* decode the bind packet. Set the protocol type in the conversation */
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/* information so the bind_info can use it to create the payload */
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/* dissector. */
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conv_info->proto = PT_TCP;
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if ( tree) {
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offset += 6;
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CHECK_PACKET_LENGTH( 4);
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proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
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offset += 16;
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CHECK_PACKET_LENGTH( 2);
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proto_tree_add_uint( tree, hf_msproxy_boundport, NullTVB, offset, 2,
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pntohs( &pd[ offset]));
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offset += 96;
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display_application_name( pd, offset, fd, tree);
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}
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}
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|
|
static void dissect_request_connect(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* decode the connect request, display */
|
|
|
|
conv_info->proto = PT_TCP;
|
|
|
|
offset += 20;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
|
|
conv_info->dst_port = pntohs( &pd[ offset]);
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
if ( tree)
|
|
proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
|
|
GWORD( pd, offset));
|
|
|
|
memcpy( &conv_info->dst_addr, &pd[ offset], sizeof( guint32));
|
|
|
|
offset += 12;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
conv_info->clnt_port = pntohs( &pd[ offset]);
|
|
|
|
if ( tree){
|
|
proto_tree_add_uint( tree, hf_msproxy_clntport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
|
|
offset += 84;
|
|
|
|
display_application_name( pd, offset, fd, tree);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_bind_info_ack(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* decode the client bind info ack */
|
|
|
|
|
|
if ( tree){
|
|
offset += 6;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
|
|
offset += 14;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
|
|
GWORD( pd, offset));
|
|
offset += 12;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset,
|
|
2, pntohs( &pd[ offset]));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset,
|
|
2, pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset,
|
|
4, GWORD( pd, offset));
|
|
|
|
offset += 78;
|
|
display_application_name( pd, offset, fd, tree);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_request_resolve(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree) {
|
|
|
|
/* dissect the request resolve structure */
|
|
/* display a string with a length, characters encoding */
|
|
/* they are displayed under a tree with the name in Label variable */
|
|
/* return the length of the string and the length byte */
|
|
|
|
proto_tree *name_tree;
|
|
proto_item *ti;
|
|
|
|
char temp[ 256];
|
|
int length = GBYTE( pd, offset);
|
|
|
|
if ( tree){
|
|
strncpy( temp, &pd[ offset + 18], length);
|
|
temp[ length ] = 0;
|
|
|
|
ti = proto_tree_add_text(tree, NullTVB, offset, length + 1,
|
|
"Host Name: %s", temp);
|
|
|
|
name_tree = proto_item_add_subtree(ti, ett_msproxy_name);
|
|
|
|
proto_tree_add_text( name_tree, NullTVB, offset, 1, "Length: %d", length);
|
|
|
|
++offset;
|
|
offset += 17;
|
|
|
|
proto_tree_add_text( name_tree, NullTVB, offset, length, "String: %s",
|
|
temp);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_udp_bind(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* Dissect the udp bind request. Load the protocol id (PT_UDP) and the */
|
|
/* remote address so bind_info can use it to create conversation */
|
|
/* dissector. */
|
|
|
|
conv_info->proto = PT_UDP;
|
|
|
|
|
|
offset += 8;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
|
|
offset += 12;
|
|
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
if ( tree)
|
|
proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
|
|
GWORD( pd, offset));
|
|
|
|
offset += 96;
|
|
|
|
if ( tree)
|
|
display_application_name( pd, offset, fd, tree);
|
|
}
|
|
|
|
|
|
static void dissect_udp_assoc(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* dissect the udp associate request. And load client port into */
|
|
/* conversation data structure for later. */
|
|
|
|
|
|
offset += 28;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_clntport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
|
|
conv_info->clnt_port = pntohs( &pd[ offset]);
|
|
|
|
offset += 90;
|
|
|
|
if ( tree)
|
|
display_application_name( pd, offset, fd, tree);
|
|
|
|
|
|
}
|
|
|
|
|
|
static void dissect_msproxy_request(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
int cmd;
|
|
char temp[ 255];
|
|
|
|
if ( tree) {
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "Client id: 0x%0x",
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "Version: 0x%04x",
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "Server id: 0x%0x",
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_text( tree, NullTVB, offset, 1, "Server ack: %u",
|
|
GBYTE( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 1);
|
|
proto_tree_add_text( tree, NullTVB, offset, 1, "Sequence Number: %u",
|
|
GBYTE( pd, offset));
|
|
offset += 8;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
strncpy( temp, &pd[ offset], 4);
|
|
temp[ 4] = 0;
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "RWSP signature: %s", temp);
|
|
offset += 12;
|
|
}
|
|
else /* no tree */
|
|
offset += 36;
|
|
|
|
CHECK_PACKET_LENGTH( 1);
|
|
cmd = pntohs( &pd[offset]);
|
|
|
|
if ( tree)
|
|
proto_tree_add_uint_format( tree, hf_msproxy_cmd, NullTVB, offset, 2,
|
|
cmd, "Command: 0x%02x (%s)", cmd,
|
|
get_msproxy_cmd_name( cmd, FROM_CLIENT));
|
|
|
|
offset += 2;
|
|
|
|
switch (cmd){
|
|
case MSPROXY_AUTH:
|
|
dissect_auth( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_BIND:
|
|
dissect_bind( pd, offset, fd, tree, conv_info);
|
|
|
|
break;
|
|
case MSPROXY_UDP_BIND_REQ:
|
|
dissect_udp_bind( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
|
|
case MSPROXY_AUTH_2: /*$$ this is probably wrong place for this */
|
|
case MSPROXY_TCP_BIND:
|
|
dissect_tcp_bind( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
|
|
case MSPROXY_RESOLVE:
|
|
dissect_request_resolve( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_CONNECT:
|
|
case MSPROXY_LISTEN:
|
|
dissect_request_connect( pd, offset, fd, tree,
|
|
conv_info);
|
|
break;
|
|
|
|
case MSPROXY_BINDINFO_ACK:
|
|
dissect_bind_info_ack( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
|
|
case MSPROXY_HELLO:
|
|
case MSPROXY_HELLO_2:
|
|
dissect_msproxy_request_1( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_UDPASSOCIATE:
|
|
dissect_udp_assoc( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
default:
|
|
if ( tree)
|
|
proto_tree_add_text( tree, NullTVB, offset, 0,
|
|
"Unhandled request command (report this, please)");
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_hello_ack(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* decode the hello acknowledge packet */
|
|
|
|
offset += 60;
|
|
|
|
if ( tree) {
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_serverport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_serveraddr, NullTVB, offset, 4,
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_user_info_ack(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree) {
|
|
|
|
/* decode the response _2 structure */
|
|
|
|
offset += 18;
|
|
|
|
offset += 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dissect_udpassociate_ack( const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree) {
|
|
|
|
|
|
offset += 6;
|
|
|
|
if ( tree) {
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
|
|
offset += 14;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset, 2, pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset, 4, GWORD( pd, offset));
|
|
|
|
offset += 96;
|
|
display_application_name( pd, offset, fd, tree);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_auth_1_ack(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
|
|
char temp[ 255];
|
|
|
|
offset += 134;
|
|
if ( tree) {
|
|
|
|
CHECK_PACKET_LENGTH( 7);
|
|
strncpy( temp, &pd[ offset], 7);
|
|
temp[ 7] = 0;
|
|
proto_tree_add_text( tree, NullTVB, offset, 7, "NTLMSSP signature: %s", temp);
|
|
offset += 48;
|
|
|
|
strncpy( temp, &pd[ offset], MIN( 255, END_OF_FRAME));
|
|
temp[ MIN( 255, END_OF_FRAME)] = 0;
|
|
proto_tree_add_text( tree, NullTVB, offset, 255, "NT domain: %s", temp);
|
|
offset += 7;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_msproxy_response_4( const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree) {
|
|
|
|
/* decode the response _4 structure */
|
|
|
|
offset += 134;
|
|
}
|
|
|
|
|
|
|
|
static void dissect_connect_ack( const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* decode the connect ack packet */
|
|
offset += 20;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset, 2, pntohs( &pd[ offset]));
|
|
|
|
|
|
conv_info->proto = PT_TCP;
|
|
conv_info->server_int_port = pntohs( &pd[ offset]);
|
|
offset += 2;
|
|
|
|
if ( tree){
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_server_int_addr, NullTVB, offset, 2, GWORD( pd, offset));
|
|
offset += 14;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset, 2, pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset, 4, GWORD( pd, offset));
|
|
offset += 80;
|
|
|
|
display_application_name( pd, offset, fd, tree);
|
|
}
|
|
|
|
add_msproxy_conversation( conv_info);
|
|
}
|
|
|
|
|
|
|
|
static void dissect_tcp_bind_ack( const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree) {
|
|
|
|
/* decode the tcp bind */
|
|
|
|
if ( tree) {
|
|
offset += 6;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
|
|
offset += 16;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset,
|
|
2, pntohs( &pd[ offset]));
|
|
offset += 6;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset,
|
|
2, pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset,
|
|
4, GWORD( pd, offset));
|
|
|
|
offset += 88;
|
|
|
|
display_application_name( pd, offset, fd, tree);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_bind_info( const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
/* decode the Bind info response from server */
|
|
|
|
offset += 6;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
|
|
offset += 14;
|
|
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
|
|
pntohs( &pd[ offset]));
|
|
conv_info->dst_port = pntohs( &pd[ offset]);
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
if ( tree)
|
|
proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
|
|
GWORD( pd, offset));
|
|
|
|
memcpy( &conv_info->dst_addr, &pd[ offset], sizeof( guint32));
|
|
|
|
offset += 12;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
if ( tree)
|
|
proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset,
|
|
2, pntohs( &pd[ offset]));
|
|
conv_info->server_int_port = pntohs( &pd[ offset]);
|
|
offset += 4;
|
|
|
|
if ( tree) {
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset,
|
|
2, pntohs( &pd[ offset]));
|
|
offset += 2;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset,
|
|
4, GWORD( pd, offset));
|
|
|
|
offset += 78;
|
|
display_application_name( pd, offset, fd, tree);
|
|
|
|
}
|
|
|
|
add_msproxy_conversation( conv_info);
|
|
}
|
|
|
|
|
|
|
|
static void dissect_resolve(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree) {
|
|
|
|
/* dissect the response resolve structure */
|
|
/* display a string with a length, characters encoding */
|
|
/* they are displayed under a tree with the name in Label variable */
|
|
/* return the length of the string and the length byte */
|
|
|
|
if ( tree) {
|
|
|
|
int addr_offset = GBYTE( pd, offset);
|
|
|
|
proto_tree_add_text( tree, NullTVB, offset, 1, "Address offset: %d",
|
|
addr_offset);
|
|
|
|
++offset;
|
|
|
|
offset += 13;
|
|
|
|
offset += addr_offset;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_ipv4( tree, hf_msproxy_resolvaddr, NullTVB, offset, 4,
|
|
GWORD( pd, offset));
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void dissect_msproxy_response(const u_char *pd, int offset, frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
|
|
|
|
char temp[ 255];
|
|
int cmd;
|
|
|
|
|
|
if ( tree) {
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "Client id: 0x%0x",
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "Version: 0x%04x",
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "Server id: 0x%04x",
|
|
GWORD( pd, offset));
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 1);
|
|
proto_tree_add_text( tree, NullTVB, offset, 1, "Client ack: 0x%02x",
|
|
GBYTE( pd, offset));
|
|
|
|
offset += 4;
|
|
|
|
CHECK_PACKET_LENGTH( 1);
|
|
proto_tree_add_text( tree, NullTVB, offset, 1, "Sequence Number: 0x%02x",
|
|
GBYTE( pd, offset));
|
|
|
|
offset += 8;
|
|
|
|
CHECK_PACKET_LENGTH( 4);
|
|
strncpy( temp, &pd[ offset], 4);
|
|
temp[ 4] = 0;
|
|
proto_tree_add_text( tree, NullTVB, offset, 4, "RWSP signature: %s", temp);
|
|
|
|
offset += 12;
|
|
}
|
|
else
|
|
offset += 36;
|
|
|
|
CHECK_PACKET_LENGTH( 2);
|
|
cmd = pntohs( &pd[offset]);
|
|
|
|
if ( tree)
|
|
proto_tree_add_uint_format( tree, hf_msproxy_cmd, NullTVB, offset, 2,
|
|
cmd, "Command: 0x%02x (%s)", cmd,
|
|
get_msproxy_cmd_name( cmd, FROM_SERVER));
|
|
offset += 2;
|
|
|
|
switch (cmd) {
|
|
case MSPROXY_HELLO_ACK:
|
|
dissect_hello_ack( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
|
|
case MSPROXY_USERINFO_ACK:
|
|
dissect_user_info_ack( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_AUTH_1_ACK:
|
|
dissect_auth_1_ack( pd, offset, fd, tree);
|
|
break;
|
|
|
|
/* this also handle the MSPROXY_BIND_ACK ??? check this */
|
|
|
|
case MSPROXY_UDPASSOCIATE_ACK:
|
|
dissect_udpassociate_ack( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_AUTH_2_ACK:
|
|
case MSPROXY_AUTH_2_ACK2:
|
|
dissect_msproxy_response_4( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_TCP_BIND_ACK:
|
|
dissect_tcp_bind_ack( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_CONNECT_ACK:
|
|
dissect_connect_ack( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
|
|
case MSPROXY_BINDINFO:
|
|
dissect_bind_info( pd, offset, fd, tree, conv_info);
|
|
break;
|
|
|
|
case MSPROXY_RESOLVE_ACK:
|
|
dissect_resolve( pd, offset, fd, tree);
|
|
break;
|
|
|
|
case MSPROXY_CONNECT_AUTHFAILED:
|
|
case MSPROXY_BIND_AUTHFAILED:
|
|
proto_tree_add_text( tree, NullTVB, offset, 0, "No know information (help wanted)");
|
|
break;
|
|
|
|
default:
|
|
|
|
if (tree &&
|
|
(((cmd >> 8) == MSPROXY_CONNREFUSED) ||
|
|
((cmd >> 12) == MSPROXY_CONNREFUSED)))
|
|
proto_tree_add_text( tree, NullTVB, offset, 0,
|
|
"No know information (help wanted)");
|
|
|
|
else if ( tree)
|
|
proto_tree_add_text( tree, NullTVB, offset, 0,
|
|
"Unhandled response command (report this, please)");
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dissect_msproxy(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
|
|
proto_tree *msproxy_tree = NULL;
|
|
proto_item *ti;
|
|
unsigned int cmd;
|
|
|
|
|
|
hash_entry_t *hash_info;
|
|
conversation_t *conversation;
|
|
|
|
OLD_CHECK_DISPLAY_AS_DATA(proto_msproxy, pd, offset, fd, tree);
|
|
|
|
conversation = find_conversation( &pi.src, &pi.dst, pi.ptype,
|
|
pi.srcport, pi.destport, 0);
|
|
|
|
if ( conversation) /* conversation found */
|
|
hash_info = conversation->data;
|
|
|
|
/* new conversation create local data structure */
|
|
else {
|
|
hash_info = g_mem_chunk_alloc(vals);
|
|
|
|
conversation_new( &pi.src, &pi.dst, pi.ptype,
|
|
pi.srcport, pi.destport, hash_info, 0);
|
|
}
|
|
|
|
if (check_col(fd, COL_PROTOCOL))
|
|
col_set_str(fd, COL_PROTOCOL, "MSproxy");
|
|
|
|
|
|
/* display packet info */
|
|
if (check_col(fd, COL_INFO)){
|
|
|
|
cmd = pntohs( &pd[offset + 36]);
|
|
|
|
if ( pi.srcport == UDP_PORT_MSPROXY)
|
|
col_add_fstr( fd, COL_INFO, "Server message: %s",
|
|
get_msproxy_cmd_name( cmd, FROM_SERVER));
|
|
else
|
|
col_add_fstr(fd, COL_INFO, "Client message: %s",
|
|
get_msproxy_cmd_name( cmd, FROM_CLIENT));
|
|
|
|
}
|
|
|
|
if (tree) { /* if proto tree, decode data */
|
|
ti = proto_tree_add_item( tree, proto_msproxy, NullTVB, offset,
|
|
END_OF_FRAME, FALSE );
|
|
|
|
msproxy_tree = proto_item_add_subtree(ti, ett_msproxy);
|
|
}
|
|
|
|
if ( pi.srcport == UDP_PORT_MSPROXY)
|
|
dissect_msproxy_response( pd, offset, fd, msproxy_tree, hash_info);
|
|
else
|
|
dissect_msproxy_request( pd, offset, fd, msproxy_tree, hash_info);
|
|
}
|
|
|
|
|
|
|
|
static void msproxy_reinit( void){
|
|
|
|
/* Do the cleanup work when a new pass through the packet list is */
|
|
/* performed. Reset the highest row seen counter and re-initialize the */
|
|
/* conversation memory chunks. */
|
|
|
|
last_row = 0;
|
|
|
|
if (vals)
|
|
g_mem_chunk_destroy(vals);
|
|
|
|
vals = g_mem_chunk_new("msproxy_vals", hash_val_length,
|
|
hash_init_count * hash_val_length,
|
|
G_ALLOC_AND_FREE);
|
|
|
|
if (redirect_vals)
|
|
g_mem_chunk_destroy(redirect_vals);
|
|
|
|
redirect_vals = g_mem_chunk_new("msproxy_redirect_vals", redirect_val_length,
|
|
redirect_init_count * redirect_val_length,
|
|
G_ALLOC_AND_FREE);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
proto_register_msproxy( void){
|
|
|
|
/* Prep the msproxy protocol, for now, just register it */
|
|
|
|
static gint *ett[] = {
|
|
&ett_msproxy,
|
|
&ett_msproxy_name
|
|
};
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_msproxy_cmd,
|
|
{ "Command", "msproxy.command", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, ""
|
|
}
|
|
},
|
|
|
|
{ &hf_msproxy_dstaddr,
|
|
{ "Destination Address", "msproxy.dstaddr", FT_IPv4, BASE_NONE, NULL,
|
|
0x0, ""
|
|
}
|
|
},
|
|
|
|
{ &hf_msproxy_srcport,
|
|
{ "Source Port", "msproxy.srcport", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_dstport,
|
|
{ "Destination Port", "msproxy.dstport", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_clntport,
|
|
{ "Client Port", "msproxy.clntport", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_server_ext_addr,
|
|
{ "Server External Address", "msproxy.server_ext_addr", FT_IPv4, BASE_NONE, NULL,
|
|
0x0, ""
|
|
}
|
|
},
|
|
|
|
{ &hf_msproxy_server_ext_port,
|
|
{ "Server External Port", "msproxy.server_ext_port", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
|
|
{ &hf_msproxy_server_int_addr,
|
|
{ "Server Internal Address", "msproxy.server_int_addr", FT_IPv4, BASE_NONE, NULL,
|
|
0x0, ""
|
|
}
|
|
},
|
|
|
|
{ &hf_msproxy_server_int_port,
|
|
{ "Server Internal Port", "msproxy.server_int_port", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_serverport,
|
|
{ "Server Port", "msproxy.serverport", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_bindport,
|
|
{ "Bind Port", "msproxy.bindport", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_boundport,
|
|
{ "Bound Port", "msproxy.boundport", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_serveraddr,
|
|
{ "Server Address", "msproxy.serveraddr", FT_IPv4, BASE_NONE, NULL,
|
|
0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_bindaddr,
|
|
{ "Destination", "msproxy.bindaddr", FT_IPv4, BASE_NONE, NULL,
|
|
0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_bind_id,
|
|
{ "Bound Port Id", "msproxy.bindid", FT_UINT32,
|
|
BASE_HEX, NULL, 0x0, ""
|
|
}
|
|
},
|
|
{ &hf_msproxy_resolvaddr,
|
|
{ "Address", "msproxy.resolvaddr", FT_IPv4, BASE_NONE, NULL,
|
|
0x0, ""
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
proto_msproxy = proto_register_protocol ( "MSProxy Protocol", "msproxy");
|
|
|
|
proto_register_field_array(proto_msproxy, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_init_routine( &msproxy_reinit); /* register re-init routine */
|
|
}
|
|
|
|
|
|
void
|
|
proto_reg_handoff_msproxy(void) {
|
|
|
|
/* dissector install routine */
|
|
|
|
old_dissector_add("udp.port", UDP_PORT_MSPROXY, dissect_msproxy);
|
|
}
|