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Connection tracking is used to track packets in prerouting and
output hooks of iptables. The NAT rules modify the tuples in
connections. The connection tracking code modifies the packets by
looking at the modified tuples.
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If the NIC already has a generated SLAAC address, regenerate a new SLAAC
address until one is generated that does not conflict with the NIC's
existing addresses, up to a maximum of 10 attempts.
This applies to both stable and temporary SLAAC addresses.
Test: stack_test.TestMixedSLAACAddrConflictRegen
PiperOrigin-RevId: 309495628
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PiperOrigin-RevId: 309491861
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PiperOrigin-RevId: 309467878
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All three follow the same pattern:
1. Refactor VFS1 sockets into socketOpsCommon, so that most of the methods can
be shared with VFS2.
2. Create a FileDescriptionImpl with the corresponding socket operations,
rewriting the few that cannot be shared with VFS1.
3. Set up a VFS2 socket provider that creates a socket by setting up a dentry
in the global Kernel.socketMount and connecting it with a new
FileDescription.
This mostly completes the work for porting sockets to VFS2, and many syscall
tests can be enabled as a result.
There are several networking-related syscall tests that are still not passing:
1. net gofer tests
2. socketpair gofer tests
2. sendfile tests (splice is not implemented in VFS2 yet)
Updates #1478, #1484, #1485
PiperOrigin-RevId: 309457331
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Updates #231
PiperOrigin-RevId: 309339316
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Updates #231
PiperOrigin-RevId: 309323808
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PiperOrigin-RevId: 309317605
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This fixes bash in Ubuntu.
Updates #1672.
PiperOrigin-RevId: 309298252
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PiperOrigin-RevId: 309265978
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Implement rule 7 of Source Address Selection RFC 6724 section 5. This
makes temporary (short-lived) addresses preferred over non-temporary
addresses when earlier rules are equal.
Test: stack_test.TestIPv6SourceAddressSelectionScopeAndSameAddress
PiperOrigin-RevId: 309250975
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The /proc/net/udp header was missing, and /proc/sys/net was set up as
/proc/sys/net/net. Discovered while trying to run networking tests for VFS2.
PiperOrigin-RevId: 309243758
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Previously the test used an out-dated window size which is advertised
during the handshake to generate testing packets, but the window size
has changed since the handshake; currently it is using the most recent
one which is advertised in DUT's ACK to our FIN packet to generate the
testing outside-the-window packets.
PiperOrigin-RevId: 309222921
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PiperOrigin-RevId: 309176385
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Updates #1476
PiperOrigin-RevId: 309098590
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The netfilter package uses logs to make debugging the (de)serialization of
structs easier. This generates a lot of (usually irrelevant) logs. Logging is
now hidden behind a debug flag.
PiperOrigin-RevId: 309087115
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PiperOrigin-RevId: 309082540
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Enforce write permission checks in BoundEndpointAt, which corresponds to the
permission checks in Linux (net/unix/af_unix.c:unix_find_other).
Also, create bound socket files with the correct permissions in VFS2.
Fixes #2324.
PiperOrigin-RevId: 308949084
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PiperOrigin-RevId: 308940886
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PiperOrigin-RevId: 308932254
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Support generating temporary (short-lived) IPv6 SLAAC addresses to
address privacy concerns outlined in RFC 4941.
Tests:
- stack_test.TestAutoGenTempAddr
- stack_test.TestNoAutoGenTempAddrForLinkLocal
- stack_test.TestAutoGenTempAddrRegen
- stack_test.TestAutoGenTempAddrRegenTimerUpdates
- stack_test.TestNoAutoGenTempAddrWithoutStableAddr
- stack_test.TestAutoGenAddrInResponseToDADConflicts
PiperOrigin-RevId: 308915566
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PiperOrigin-RevId: 308901116
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TempPath's destructor runs at the end of the named pipe creation functions,
deleting the named pipe. If the named pipe is backed by a "non-virtual"
filesystem (!fs.Inode.IsVirtual()), this causes the following save attempt to
fail because there are FDs holding the deleted named pipe open.
PiperOrigin-RevId: 308861999
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PiperOrigin-RevId: 308829800
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Named pipes and sockets can be represented in two ways in gofer fs:
1. As a file on the remote filesystem. In this case, all file operations are
passed through 9p.
2. As a synthetic file that is internal to the sandbox. In this case, the
dentry stores an endpoint or VFSPipe for sockets and pipes respectively,
which replaces interactions with the remote fs through the gofer.
In gofer.filesystem.MknodAt, we attempt to call mknod(2) through 9p,
and if it fails, fall back to the synthetic version.
Updates #1200.
PiperOrigin-RevId: 308828161
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PiperOrigin-RevId: 308727526
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The FileDescription implementation for hostfs sockets uses the standard Unix
socket implementation (unix.SocketVFS2), but is also tied to a hostfs dentry.
Updates #1672, #1476
PiperOrigin-RevId: 308716426
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Poll for metric updates as immediately trying to read them can sometimes be
flaky if due to goroutine scheduling the check happens before the sender has got
a chance to update the corresponding sent metric.
PiperOrigin-RevId: 308712817
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PiperOrigin-RevId: 308706483
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Previously we unconditionally failed to cleanup the networking files
(hostname, resolve.conf, hosts), and failed to cleanup the netns, etc on
partial setup failure.
We can drop the iptables commands from cleanup, as the routes
automatically go away when the device is deleted. Those commands were
failing previously.
Forward signals to the container, allowing it to exit normally when a
signal is received, and then for runsc to run the cleanup. This doesn't
cover cleanup when runsc is signalled before the container start, it
covers the most common case.
Fixes #2539
Fixes #2540
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The meaning for skipDump was reversed, but not all callers
were updated. Change the meaning once again to forceDump, so
that the period between stack dump is respected from all
callers.
PiperOrigin-RevId: 308674373
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PiperOrigin-RevId: 308674219
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Use the sighandling package for Container.ForwardSignals, for
consistency with other signal forwarding.
Fixes #2546
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PiperOrigin-RevId: 308617610
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typo, should be `start` in comments
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catch up
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Signed-off-by: moricho <ikeda.morito@gmail.com>
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PiperOrigin-RevId: 308472331
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Several tests are passing after getting TestAppExitStatus (run /bin/true)
changes. Make versions that run via VFS2 so that we know what is and isn't
working.
In addition, fix bug in VFSFile ReadFull. For the TestExePath test in
container_test.go, the case "unmasked" will return 0 bytes read with no
EOF err, causing the ReadFull call to spin.
PiperOrigin-RevId: 308428126
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Signed-off-by: moricho <ikeda.morito@gmail.com>
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rbind
Signed-off-by: moricho <ikeda.morito@gmail.com>
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Tested:
Ran a packetimpact test after `docker image rm` and examined the message.
PiperOrigin-RevId: 308370603
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This change includes:
- Modifications to loader_test.go to get TestCreateMountNamespace to
pass with VFS2.
- Changes necessary to get TestHelloWorld in image tests to pass with
VFS2. This means runsc can run the hello-world container with docker
on VSF2.
Note: Containers that use sockets will not run with these changes.
See "//test/image/...". Any tests here with sockets currently fail
(which is all of them but HelloWorld).
PiperOrigin-RevId: 308363072
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Closes #2489
PiperOrigin-RevId: 308362434
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PiperOrigin-RevId: 308347744
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Tested:
When run on Linux, a correct ICMPv6 response is received. On netstack, no
ICMPv6 response is received.
PiperOrigin-RevId: 308343113
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Display the errors as diffs between the expected and wanted frame.
PiperOrigin-RevId: 308333271
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PiperOrigin-RevId: 308328860
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This change moves all Docker images to a standard location, and abstracts the
build process so that they can be maintained in an automated fashion. This also
allows the images to be architecture-independent.
All images will now be referred to by the test framework via the canonical
`gvisor.dev/images/<name>`, where `<name>` is a function of the path within the
source tree.
In a subsequent change, continuous integration will be added so that the images
will always be correct and available locally.
In the end, using `bazel` for Docker containers is simply not possible. Given
that we already have the need to use `make` with the base container (for
Docker), we extend this approach to get more flexibility.
This change also adds a self-documenting and powerful Makefile that is intended
to replace the collection of scripts in scripts. Canonical (self-documenting)
targets can be added here for targets that understand which images need to be
loaded and/or built.
PiperOrigin-RevId: 308322438
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Fixes #1477.
PiperOrigin-RevId: 308317511
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