如何从C代码增加net.core.rmem_max值 [英] How to increase net.core.rmem_max value from c code

问题描述

我试图通过getsockopt(udp_fd，SOL_SOCKET，SO_RCVBUF，& rcvBufferSize和& sockOptSize)增加值SO_RCVBUF，但我无法将其增加到超过rmem_max值.

I tried to increase the value SO_RCVBUF by getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &rcvBufferSize, &sockOptSize) but I am not able to increase it more than rmem_max value.

所以请告诉我如何用C代码增加它.我不想通过命令增加它:

So please tell me how can I increase it by C Code. I don't want to increase it by command :

$ sysctl -w net.core.rmem_max=value

推荐答案

在Linux内核2.6.14及更高版本中，我们具有SO_RCVBUFFORCE，可用于覆盖rmem_max限制.但是，这需要设置CAP_NET_ADMIN.

In Linux kernels 2.6.14 and above we have SO_RCVBUFFORCE which can be used to override the rmem_max limit. However this needs CAP_NET_ADMIN to be set.

检查 https://linux.die.net/man/7/socket.

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