linux – 限制传入流量的速率

A process utilizing BSD sockets may perform its own rate limiting.
For upstream limiting,the application
can do this by simply limiting the
rate of data that is written to a
socket. Similarly,for downstream
limiting,an application may limit the
rate of data it reads from a socket.
However,the reason why this works is
not immediately obvious. When the
application neglects to read some data
from a socket,its socket receive
buffers fill up. This in turn will
cause the receiving TCP to advertise a
smaller receiver window (rwnd),
creating back pressure on the
underlying TCP connection thus
limiting its data flow. Eventually
this “trickle-down” effect achieves
end-to-end rate limiting. Depending on
buffering in all layers of the network
stack,this effect may take some time
to propagate.

如果您偶尔需要对UNIX系统上的单个程序进行速率限制,那么简单的解决方案就是trickle.真正的流量整形就像您在网关上执行一样,可以使用tc完成.这在Linux Advanced Routing& Sons的Chapter 9. Queueing Disciplines for Bandwidth Management中有记载.交通管制HOWTO.