problem with checking dhcp-packet type

Tue Jul 7 08:42:06 CEST 2009

Hello.

Freeradius 2.1.6

Below of the message translated and not translated code of dhcp-packet from 
client soho-router TrendNet 631BRP.
As i can see, the main problem is a wrong order (for freeradius rules) of dhcp 
options and that's why such packet did not recognized and did not accepted.
When packet is arriving i see "Unknown, or badly formatted DHCP packet".

How to fix this?

P.S. sorry for my english.

====not translated==============
0000  00 04 23 cc 33 98 00 1b  11 97 74 7e 08 00 45 00   ..#.3... ..t~..E.
0010  01 48 09 78 00 00 40 11  72 5a 59 de a5 01 59 de   .H.x.. at . rZY...Y.
0020  a5 15 00 43 00 43 01 34  a8 46 01 01 06 01 7c 5e   ...C.C.4 .F....|^
0030  42 a1 00 00 80 00 00 00  00 00 00 00 00 00 00 00   B....... ........
0040  00 00 59 de e9 01 00 15  17 3a 0c d1 00 00 00 00   ..Y..... .:......
0050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0070  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0080  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
00a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
00b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
00c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
00d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
00e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
00f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0100  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0110  00 00 00 00 00 00 63 82  53 63 0c 06 42 65 69 72   ......c. Sc..Beir
0120  65 6c 37 07 01 03 06 2c  0f 2e 2f 35 01 01 52 12   el7...., ../5..R.
0130  01 06 00 04 02 12 00 07  02 08 01 06 00 1b 11 b5   ........ ........
0140  ef 04 ff 00 00 00 00 00  00 00 00 00 00 00 00 00   ........ ........
0150  00 00 00 00 00 00                                  ......  
==================

======translated by tshark============
Frame 1896 (342 bytes on wire, 342 bytes captured)
    Arrival Time: Jul  6, 2009 20:49:28.162401000
    [Time delta from previous captured frame: 69.069364000 seconds]
    [Time delta from previous displayed frame: 69.069364000 seconds]
    [Time since reference or first frame: 42290.060516000 seconds]
    Frame Number: 1896
    Frame Length: 342 bytes
    Capture Length: 342 bytes
    [Frame is marked: False]
    [Protocols in frame: eth:ip:udp:bootp]
Ethernet II, Src: D-Link_97:74:7e (00:1b:11:97:74:7e), Dst: Intel_cc:33:98 
(00:04:23:cc:33:98)
    Destination: Intel_cc:33:98 (00:04:23:cc:33:98)
        Address: Intel_cc:33:98 (00:04:23:cc:33:98)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address 
(factory default)
    Source: D-Link_97:74:7e (00:1b:11:97:74:7e)
        Address: D-Link_97:74:7e (00:1b:11:97:74:7e)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address 
(factory default)
    Type: IP (0x0800)
Internet Protocol, Src: 89.222.165.1 (89.222.165.1), Dst: 89.222.165.21 
(89.222.165.21)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 328
    Identification: 0x0978 (2424)
    Flags: 0x00
        0... = Reserved bit: Not set
        .0.. = Don't fragment: Not set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: UDP (0x11)
    Header checksum: 0x725a [correct]
        [Good: True]
        [Bad : False]
    Source: 89.222.165.1 (89.222.165.1)
    Destination: 89.222.165.21 (89.222.165.21)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67)
    Source port: bootps (67)
    Destination port: bootps (67)
    Length: 308
    Checksum: 0xa846 [correct]
        [Good Checksum: True]
        [Bad Checksum: False]
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 1
    Transaction ID: 0x7c5e42a1
    Seconds elapsed: 0
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 89.222.233.1 (89.222.233.1)
    Client MAC address: IntelCor_3a:0c:d1 (00:15:17:3a:0c:d1)
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=12,l=6) Host Name = "Beirel"
        Option: (12) Host Name
        Length: 6
        Value: 42656972656C
    Option: (t=55,l=7) Parameter Request List
        Option: (55) Parameter Request List
        Length: 7
        Value: 0103062C0F2E2F
        1 = Subnet Mask
        3 = Router
        6 = Domain Name Server
        44 = NetBIOS over TCP/IP Name Server
        15 = Domain Name
        46 = NetBIOS over TCP/IP Node Type
        47 = NetBIOS over TCP/IP Scope
    Option: (t=53,l=1) DHCP Message Type = DHCP Discover
        Option: (53) DHCP Message Type
        Length: 1
        Value: 01
    Option: (t=82,l=18) Agent Information Option
        Option: (82) Agent Information Option
        Length: 18
        Value: 010600040212000702080106001B11B5EF04
        Agent Circuit ID: 000402120007
        Agent Remote ID: 0106001B11B5EF04
    End Option
    Padding
=============================
-- 
Alexander Kubatkin