I recently increased my ETHERNET MTU size to 10k+. However I noticed that busybox ping has stopped working. When I analysed the source code I realised that in ping4 we do the calculation;
sockopt = (datalen * 2) + 7 * 1024; Then we use this calculation to set the rcvbuff size. Is there any explanation behind this calculation? Also, in my case if the buffer size is less then approximately my ETHERNET MTU I do not received any replies is there an explanation behind this? A temporary patch is to run tests and find out the required RCV BUFF for my pings to go trough. Once I found this value to force the rcv buff to always be this size.
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