p4alu: Arithmetic Logic Unit in P4

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~ p4alu ~ Arithmetic Logic Unit in P4 Kentaro Ebisawa | Ponto Networks, Inc. ebiken@pontonetworks.com Twitter: @ebiken p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 1

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• “p4alu” is an P4 program who would parse UDP packet with payload in "p4alu header format" and apply calculation. • This program is tested using BMv2 simple_switch P4 target. • Source Code on GitHub • https://github.com/ebiken/p4sandbox/tree/master/p4alu • Generic P4 information in Japanese （日本語） • How to Run P4 Behavior Model v2 (JAPANESE) • https://www.slideshare.net/kentaroebisawa/how-to-run-p4-bmv2 p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 2 p4alu

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 3 ALU Integer Operand Integer Operand Integer Result opCode op1 op2 result

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 4 p4alu header format Integer Operand Integer Operand Integer Result opCode op1 op2 result

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 5 P4 parser

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 6 P4 action

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 7 P4 table & control

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 8 Setup netns based hosts BMv2 running p4alu

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 9 Compile and Run on BMv2

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 10 Configure Tables via runtime_CLI Forward Packet from/to port#0 <-> port#1 Apply action based on opCode • opCode: 1 => p4alu_add • opCode: 2 => p4alu_sub BMv2 Runtime CLI command format

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p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 11 Packet Format (sending from host0) • opCode: 0x01 => p4alu_add • opCode: 0x02 => p4alu_sub

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CuiShark by @slankdev | https://github.com/slankdev/cuishark p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 12 packets after going through p4alu op1 opCode op2 result

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CuiShark by @slankdev | https://github.com/slankdev/cuishark p4alu ... Arithmetic Logic Unit in P4 | Software Router BoF @ IW2017 Japan | 2017/11/29 13 packets after going through p4alu op1 opCode op2 result