Dynamic Host Configuration Protocol

Обеспечивает параметры конфигурации для Интернет-хостов. DHCP включает компоненты двух видов: параметры конфигурации доставки данных, зависящие от протокола хоста, и механизм размещения сетевых адресов для хостов.

Пример дешифрации

DHCP (Dynamic Host Configuration Protocol): RFC 2131, 1997
     43 00000001 Message operation code/message BOOTREQUEST
     44 00000001 Hardware address type......... Ethernet (10Mb)
     45 00000110 Hardware address length....... 6 Hex
     46 00000000 Hardware address options...... 0 Hex
 
     -- Transaction ID
     47 ***B4*** Integer....................... 2702995885 Dec
 
     51 ***b16** Elapsed seconds............... 0 Dec
 
     -- Flags
     53 0....... Broadcast flag................ 0 Hex
        .0000000 Spare......................... 0
     54 00000000 Spare......................... 0
 
        -- Client IP address
 
        -- (Align bits)
 
        55 ***B4*** Address....................... XX.XX.X.X
 
        -- Client IP address (your)
 
        -- (Align bits)
 
        59 ***B4*** Address....................... 0.0.0.0
 
        -- Next server IP address
 
        -- (Align bits)
 
        63 ***B4*** Address....................... 0.0.0.0
 
        -- Relay agent IP address
 
        -- (Align bits)
 
        67 ***B4*** Address....................... 0.0.0.0
 
        -- Client hardware address
        71 ***B16** Address....................... 0:XX:XX:XXX:XXX:XXX:0:0:0:0:
                                                   0:0:0:0:0:0
 
        -- Server host name
        87 ***B64** Octetstring................... 00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00
 
        -- Boot file name
       151 **B128** Octetstring................... 00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00 00 00 
                                                   00 00 00 00 00 00 00 00
 
        -- Options
 
           -- Cookie
 
           -- (Align bits)
 
          279 ***B4*** Address....................... XX.XX.XX.XX
 
           -- DHCP options
          283 00110101 Tag........................... 53: DHCP message type
          284 00000001 Length........................ 1 Dec
          285 00000011 DHCP message type............. DHCP request
          286 00111101 Tag........................... 61: Client-identifier
          287 00000111 Length........................ 7 Dec
 
              -- Client identifier
             288 00000001 Hardware address type......... Ethernet (10Mb)
             289 ***B6*** IA5-characters................ .Z.|..
 
          295 00001100 Tag........................... 12: Host name option
          296 00000101 Length........................ 5 Dec
 
           -- Host name option
          297 ***B5*** IA5-characters................ XXXXX
 
          302 01010001 Tag........................... 81: Reserved for site-specific options
 
           -- Data
          303 ***B40** Data.......................... 09 00 00 00 6F 78 61 6E 61 
                                                      2E 3C 08 4D 53 46 54 20 35 
                                                      2E 30 37 0B 01 0F 03 06 2C 
                                                      2E 2F 1F 21 F9 2B 2B 03 DC 
                                                      01 00 FF 00
 

Ссылки

• Dynamic Host Configuration Protocol