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authorKuniyuki Iwashima <kuniyu@amazon.co.jp>2020-03-10 17:05:27 +0900
committerDavid S. Miller <davem@davemloft.net>2020-03-12 12:08:09 -0700
commit7f204a7de8b08542aca3c1daa96ed20e1177ba87 (patch)
tree46fadd2182ac940b8f992ca32d32eb017eca43b4 /tools/testing/selftests/vm
parent335759211a327d61244580070d74f55561c35895 (diff)
downloadlinux-7f204a7de8b08542aca3c1daa96ed20e1177ba87.tar.bz2
selftests: net: Add SO_REUSEADDR test to check if 4-tuples are fully utilized.
This commit adds a test to check if we can fully utilize 4-tuples for connect() when all ephemeral ports are exhausted. The test program changes the local port range to use only one port and binds two sockets with or without SO_REUSEADDR and SO_REUSEPORT, and with the same EUID or with different EUIDs, then do listen(). We should be able to bind only one socket having both SO_REUSEADDR and SO_REUSEPORT per EUID, which restriction is to prevent unintentional listen(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
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