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Envoy (#170) uses this to get the original destination of redirected
packets.
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We skip gVisor tests for now, as ip6tables aren't yet implemented.
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This change adds a layer of abstraction around the internal Docker APIs,
and eliminates all direct dependencies on Dockerfiles in the infrastructure.
A subsequent change will automated the generation of local images (with
efficient caching). Note that this change drops the use of bazel container
rules, as that experiment does not seem to be viable.
PiperOrigin-RevId: 308095430
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PiperOrigin-RevId: 291745021
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Added tests for tcp protocol with input and output rules including options sport and dport
Increased timeout in iptables_test as TCP tests were timing out with existing value.
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Fix the indentation and print statements.
Moved the NAT redirect tests to new file.
Added negative test to check redirect rule on ports other than
redirected port.
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It would be preferrable to test iptables via syscall tests, but there are some
problems with that approach:
* We're limited to loopback-only, as syscall tests involve only a single
container. Other link interfaces (e.g. fdbased) should be tested.
* We'd have to shell out to call iptables anyways, as the iptables syscall
interface itself is too large and complex to work with alone.
* Running the Linux/native version of the syscall test will require root, which
is a pain to configure, is inherently unsafe, and could leave host iptables
misconfigured.
Using the go_test target allows there to be no new test runner.
PiperOrigin-RevId: 285274275
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