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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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7f204a7de8
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>
35 lines
635 B
Bash
Executable file
35 lines
635 B
Bash
Executable file
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Run tests when all ephemeral ports are exhausted.
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#
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# Author: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
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set +x
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set -e
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readonly NETNS="ns-$(mktemp -u XXXXXX)"
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setup() {
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ip netns add "${NETNS}"
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ip -netns "${NETNS}" link set lo up
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ip netns exec "${NETNS}" \
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sysctl -w net.ipv4.ip_local_port_range="32768 32768" \
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> /dev/null 2>&1
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ip netns exec "${NETNS}" \
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sysctl -w net.ipv4.ip_autobind_reuse=1 > /dev/null 2>&1
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}
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cleanup() {
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ip netns del "${NETNS}"
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}
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trap cleanup EXIT
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setup
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do_test() {
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ip netns exec "${NETNS}" ./reuseaddr_ports_exhausted
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}
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do_test
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echo "tests done"
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