https://bugs.linaro.org/show_bug.cgi?id=3685
--- Comment #2 from Bogdan Pricope <bogdan.pric...@linaro.org> --- RFC 768 User Datagram Protocol "If the computed checksum is zero, it is transmitted as all ones (the equivalent in one's complement arithmetic). An all zero transmitted checksum value means that the transmitter generated no checksum (for debugging or for higher level protocols that don't care)." RFC 8085 UDP Usage Guidelines, March 2017 "Applications SHOULD enable UDP checksums [RFC1122]. For IPv4, [RFC768] permits an option to disable their use, by setting a zero checksum value. An application is permitted to optionally discard UDP datagrams with a zero checksum [RFC1122]. When UDP is used over IPv6, the UDP checksum is relied upon to protect both the IPv6 and UDP headers from corruption (because IPv6 lacks a checksum) and MUST be used as specified in [RFC2460]. Under specific conditions, a UDP application is allowed to use a zero UDP zero-checksum mode with a tunnel protocol (see Section 3.4.1). " For IPv4 + UDP scenario, UDP csum with "all zero" value is permitted but UDP csum SHOULD be used. For IPv6 + UDP: UDP csum MUST be used. What are you describing is a driver/PMD issue and a workaround in odp code. Bill, please take a look and advise. -- You are receiving this mail because: You are on the CC list for the bug.
