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Summary of the approach: the test runner will set up a few DUTs according to
a flag and pass all the test networks to the testbench. The testbench will only
reside in a single container. The testbench will put all the test networks into
a buffered channel which served as a semaphore and now the user can freely use
t.Parallel() in (sub)tests and the true parallelism will be determined by how
many DUTs are configured. Creating DUTs on demand is not supported yet, the
test author should determine the number of DUTs to be used statically.
Specifically in this change:
- Don't export any global variables about the test network in testbench.
- Sniffer only binds on the local interface because it will be possible to have
multiple interfaces to multiple DUTs in a single testbench container.
- Migrate existing tests to stop using global variables.
PiperOrigin-RevId: 343965962
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PiperOrigin-RevId: 332097286
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On receiving an ACK with unacceptable ACK number, in a closing state,
TCP, needs to reply back with an ACK with correct seq and ack numbers and
remain in same state. This change is as per RFC793 page 37, but with a
difference that it does not apply to ESTABLISHED state, just as in Linux.
Also add more tests to check for OTW sequence number and unacceptable
ack numbers in these states.
Fixes #3785
PiperOrigin-RevId: 329616283
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PiperOrigin-RevId: 329526153
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When SO_LINGER option is enabled, the close will not return until all the
queued messages are sent and acknowledged for the socket or linger timeout is
reached. If the option is not set, close will return immediately. This option
is mainly supported for connection oriented protocols such as TCP.
PiperOrigin-RevId: 328350576
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Storing *testing.T on test helper structs is problematic when
subtests are used, because it is possible for nested tests to call
Fatal on parent test, which incorrect terminates the parent test.
For example
func TestOuter(t *testing.T) {
dut := NewDUT(t)
t.Run("first test", func(t *testing.T) {
dut.FallibleCall()
})
t.Run("second test", func(t *testing.T) {
dut.FallibleCall()
}
}
In the example above, assuming `FallibleCall` calls `t.Fatal` on the
`t` it holds, if `dut.FallibleCall` fails in "first test", it will
call `Fatal` on the parent `t`, quitting `TestOuter`. This is not a
behavior we want.
PiperOrigin-RevId: 323350241
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Also ironed out all the bugs found on the IPv6 code path that affects socket
bind, send and receive.
PiperOrigin-RevId: 321202653
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PiperOrigin-RevId: 313878910
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RST handling is broken when the TCP state transitions
from SYN-SENT to SYN-RCVD in case of simultaneous open.
An incoming RST should trigger cleanup of the endpoint.
RFC793, section 3.9, page 70.
Fixes #2814
PiperOrigin-RevId: 313828777
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PiperOrigin-RevId: 313300554
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PiperOrigin-RevId: 311424257
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PiperOrigin-RevId: 311285868
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PiperOrigin-RevId: 311011004
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PiperOrigin-RevId: 310213705
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PiperOrigin-RevId: 308940886
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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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RFC 1122 Section 3.7: A sending TCP MUST be robust against window shrinking,
which may cause the "useable window" to become negative.
PiperOrigin-RevId: 305377072
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PiperOrigin-RevId: 305157179
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This allows control over the gRPC timeouts as needed.
PiperOrigin-RevId: 304225713
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PiperOrigin-RevId: 304098611
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PiperOrigin-RevId: 301382690
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