EVB-B1+ WIZnet, EVB-B1+ Datasheet - Page 101

• Manufacturer Part Number: EVB-B1+
• Description: Development Boards & Kits - ARM W3150A+EVAL BOARD BASED ON AVR
• Manufacturer: WIZnet

Specifications of EVB-B1+

• Rohs: yes
• Product: Evaluation Boards
• Interface Type: RS-232, SPI
• Operating Supply Voltage: 3.3 V, 5 V
• Data Bus Width: 8 bit
• Dimensions: 50 mm x 40 mm
• Processor Series: ATmega128

The example of Compression Scheme of <Fig 3.45> shows DNS Message in case of “F.ISI.ARPA”,
“FOO.F.ISI.ARPA”, “ARPA”, and ROOT. “F.ISI.ARPA” is processed in the format of <Fig 3.41: Example of
QNAME Field transformation of Question Section > with Offset 20 of DNS Message without compression.
In “FOO.F.ISI.ARPA,” since the rest except for “FOO” is same as Name which is previously processed,
“FOO” is processed with <Fig 3.41: Example of QNAME Field transformation of Question Section > Format
without compression and the rest of names is processed by Offset 26. ROOT is the highest Domain and it’s
processed with Label Length Field of 0.
parse_name(), before analysis of Name, checks if upper 2 bits of Label Length Byte are 11, if it’s ‘11’ the
related Label analyzes the Label at the offset of DNS Message where the Label is located. If it’s no ‘11’ then
the Label is analyzed and processed like as <Fig 3.41: Example of QNAME Field transformation of Question
Section >.
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