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2021-06-09Remove unnecessary TODO bug.Nicolas Lacasse
The bug id was not adding anything relevant here PiperOrigin-RevId: 378485983
2021-06-04Honor data and FIN from the ACK completing handshakeMithun Iyer
If the ACK completing the handshake has FIN or data, requeue the segment for further processing by the newly established endpoint. Otherwise, the segments would have to be retransmitted by the peer to be processed by the established endpoint. Doing this, keeps the behavior in parity with Linux. This also addresses a test flake with TCPNonBlockingConnectClose where the ACK (completing the handshake) and multiple retransmitted FINACKs from the peer could be dropped by the listener, when using syncookies and the accept queue is full. The handshake could eventually get completed with a retransmitted FINACK, without actual processing of FIN. This can cause the poll with POLLRDHUP on the accepted socket to sometimes time out before the next FINACK retransmission. PiperOrigin-RevId: 377651695
2021-06-04Forward verbose flag to packetimpact testerSam Balana
Forwards the testing verbose flag to the packetimpact test runner. This is necessary for debugging inside packetimpact tests. When this flag is present, all t.Logs in the packetimpact test wil be shown in the resulting test output. PiperOrigin-RevId: 377614550
2021-06-04Allow sniffer receive timeout durations less than one usecSam Balana
Fixes the erronously signaled fatal error when the sniffer receive timeout duration is less than one usec. This was caused by the converstion from float64 to int64; the integer conversion truncated the floating point to 0, which signaled the fatal error. PiperOrigin-RevId: 377600179
2021-05-27Support SO_BINDTODEVICE in ICMP socketsSam Balana
Adds support for the SO_BINDTODEVICE socket option in ICMP sockets with an accompanying packetimpact test to exercise use of this socket option. Adds a unit test to exercise the NIC selection logic introduced by this change. The remaining unit tests for ICMP sockets need to be added in a subsequent CL. See https://gvisor.dev/issues/5623 for the list of remaining unit tests. Adds a "timeout" field to PacketimpactTestInfo, necessary due to the long runtime of the newly added packetimpact test. Fixes #5678 Fixes #4896 Updates #5623 Updates #5681 Updates #5763 Updates #5956 Updates #5966 Updates #5967 PiperOrigin-RevId: 376271581
2021-05-26Specify subsequent layers as ICMP payloads and add ICMPv6.PointerSam Balana
Moves specification of subsequent layers to the Payload field of the ICMP and ICMPv6 layers. Removes the need to manually encode type-specific ICMP or ICMPv6 headers, such as the "pointer" header of parameter problem messages, in the payload. This is necessary prework to enable matching of more type-specific headers, such as "ident" of echo requests. Fixes a bug where the "reserved" header defined by ICMPv6 RFC 4443 was being incorrectly encoded by ToBytes. This change fixes the implementation by copying the payload into Payload, instead of the MessageBody. PiperOrigin-RevId: 376026420
2021-05-20Add protocol state to TCPINFOMithun Iyer
Add missing protocol state to TCPINFO struct and update packetimpact. This re-arranges the TCP state definitions to align with Linux. Fixes #478 PiperOrigin-RevId: 374996751
2021-05-13Apply SWS avoidance to ACKs with window updatesMithun Iyer
When recovering from a zero-receive-window situation, and asked to send out an ACK, ensure that we apply SWS avoidance in our window updates. Fixes #5984 PiperOrigin-RevId: 373689578
2021-03-29[syserror] Split usermem packageZach Koopmans
Split usermem package to help remove syserror dependency in go_marshal. New hostarch package contains code not dependent on syserror. PiperOrigin-RevId: 365651233
2021-03-15Packetimpact test for ACK to OTW Seq segments behavior in CLOSINGZeling Feng
TCP, in CLOSING state, MUST send an ACK with next expected SEQ number after receiving any segment with OTW SEQ number and remain in the same state. While I am here, I also changed shutdown to behave the same as other calls in posix_server. PiperOrigin-RevId: 362976955
2021-03-09Give TCP flags a dedicated typeZeling Feng
- Implement Stringer for it so that we can improve error messages. - Use TCPFlags through the code base. There used to be a mixed usage of byte, uint8 and int as TCP flags. PiperOrigin-RevId: 361940150
2021-03-06[op] Replace syscall package usage with golang.org/x/sys/unix in test/.Ayush Ranjan
The syscall package has been deprecated in favor of golang.org/x/sys. Note that syscall is still used in some places because the following don't seem to have an equivalent in unix package: - syscall.SysProcIDMap - syscall.Credential Updates #214 PiperOrigin-RevId: 361332034
2021-03-05Gather uname information from DUTZeling Feng
Some OSs behave slightly differently, but still within the RFC. It can be useful to have access to uname information from the testbench. PiperOrigin-RevId: 361193766
2021-03-03Make dedicated methods for data operations in PacketBufferTing-Yu Wang
One of the preparation to decouple underlying buffer implementation. There are still some methods that tie to VectorisedView, and they will be changed gradually in later CLs. This CL also introduce a new ICMPv6ChecksumParams to replace long list of parameters when calling ICMPv6Checksum, aiming to be more descriptive. PiperOrigin-RevId: 360778149
2021-03-03Use struct embedding to avoid casts and reuse methodsZeling Feng
- Removed (*testbench.Connection)(&conn) like casts - Removed redundant definition of Drain, Close and ExpectFrame PiperOrigin-RevId: 360727788
2021-02-25Move SetNonblocking into posix_serverZeling Feng
- open flags can be different on different OSs, by putting SetNonblocking into the posix_server rather than the testbench, we can always get the right value for O_NONBLOCK - merged the tcp_queue_{send,receive}_in_syn_sent into a single file PiperOrigin-RevId: 359620630
2021-02-17Deflake tcp_network_unreachable testZeling Feng
Previously, we make two connect attempts. If the first attempt is still on going when the second attempt is made, the test will fail. This change deflakes the situation by not making the second attempt, instead, we poll for the first attempt's completion and read the errno from SO_ERROR. PiperOrigin-RevId: 358104769
2021-01-28Make tcp_noaccept_close_rst more robustZeling Feng
There used to be a race condition where we may call Close before the connection is established. Adding poll support so that we can eliminate this kind of race. Startblock: has LGTM from iyerm and then add reviewer tamird PiperOrigin-RevId: 354369130
2021-01-28Respect SO_BINDTODEVICE in unconnected UDP writesMarina Ciocea
Previously, sending on an unconnected UDP socket would ignore the SO_BINDTODEVICE option. Send on the configured interface when an UDP socket is bound to an interface through setsockop SO_BINDTODEVICE. Add packetimpact tests exercising UDP reads and writes with every combination of bound/unbound, broadcast/multicast/unicast destination, and bound/not-bound to device. PiperOrigin-RevId: 354299670
2020-12-12Introduce IPv6 extension header serialization facilitiesBruno Dal Bo
Adds IPv6 extension header serializer and Hop by Hop options serializer. Add RouterAlert option serializer and use it in MLD. Fixed #4996 Startblock: has LGTM from marinaciocea and then add reviewer ghanan PiperOrigin-RevId: 347174537
2020-12-10Correctly align non-matching layersTamir Duberstein
PiperOrigin-RevId: 346840424
2020-12-10Correctly print non-matching layersTamir Duberstein
PiperOrigin-RevId: 346818310
2020-12-04Introduce IPv4 options serializer and add RouterAlert to IGMPBruno Dal Bo
PiperOrigin-RevId: 345701623
2020-12-01Avoid wrong error messagesZeling Feng
Stop showing wrong timeout values in packetimpact test error messages. e.g. "got frames ... want ... during -123ms" PiperOrigin-RevId: 345144938
2020-11-25Support listener-side MLDv1Ghanan Gowripalan
...as defined by RFC 2710. Querier (router)-side MLDv1 is not yet supported. The core state machine is shared with IGMPv2. This is guarded behind a flag (ipv6.Options.MLDEnabled). Tests: ip_test.TestMGP* Bug #4861 PiperOrigin-RevId: 344344095
2020-11-24[2/3] Support isolated containers for parallel packetimpact testsZeling Feng
Added a new flag num_duts to the test runner to create multiple DUTs for the testbench can connect to. PiperOrigin-RevId: 344195435
2020-11-24Fix a potential indefinite blocking in packetimpact testbenchZeling Feng
1. setsockopt(SO_RCVTIMEO, 0) == never timeout 2. float64(time.Microsecond/time.Second) == 0 3. packetimpact tests use a lot of 1s timeouts This becomes a more significant problem because of a recent change that binds the sniffer only on the specific testNet interface so now the traffic on the ctrlNet cannot wake up the blocking call anymore. PiperOrigin-RevId: 344123465
2020-11-23[1/3] Support isolated containers for parallel packetimpact testsZeling Feng
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
2020-11-13Requested Comment/Message wording changesJulian Elischer
PiperOrigin-RevId: 342366891
2020-11-12Change AllocationSize to SizeWithPadding as requestedJulian Elischer
RELNOTES: n/a PiperOrigin-RevId: 342176296
2020-11-11Teach netstack how to add options to IPv4 packetsJulian Elischer
Most packets don't have options but they are an integral part of the standard. Teaching the ipv4 code how to handle them will simplify future testing and use. Because Options are so rare it is worth making sure that the extra work is kept out of the fast path as much as possible. Prior to this change, all usages of the IHL field of the IPv4Fields/Encode system set it to the same constant value except in a couple of tests for bad values. From this change IHL will not be a constant as it will depend on the size of any Options. Since ipv4.Encode() now handles the options it becomes a possible source of errors to let the callers set this value, so remove it entirely and calculate the value from the size of the Options if present (or not) therefore guaranteeing a correct value. Fixes #4709 RELNOTES: n/a PiperOrigin-RevId: 341864765
2020-11-09Additions to ICMP and IPv4 parsersJulian Elischer
Teach ICMP.Parser/ToBytes to handle some non echo ICMP packets. Teach IPv4.Parser that fragments only have a payload, not an upper layer. Fix IPv4 and IPv6 reassembly tests to handle the change. Fixes #4758 PiperOrigin-RevId: 341549665
2020-10-29Add support for bare IPv4 in packetimpact testsArthur Sfez
PiperOrigin-RevId: 339699771
2020-10-28Add the payload directly to the ICMPv4 typeArthur Sfez
This makes handling inbound fragmented packets easier, because a fragmented packet might not have an actual ICMP header but only a payload. After this change, the ICMPv4 is the last layer you can get because the payload is embedded in it. Note that this makes it consistent with the ICMPv6 implementation. While I'm here, I've also added the Ident and Sequence fields on the ICMPv4 type. Defaults are still zero. PiperOrigin-RevId: 339577094
2020-10-28Bump honnef.co/go/tools to v0.0.1-2020.1.6Ting-Yu Wang
PiperOrigin-RevId: 339476515
2020-10-07Add staticcheck and staticstyle analyzers.Adin Scannell
This change also adds support to go_stateify for detecting an appropriate receiver name, avoiding a large number of false positives. PiperOrigin-RevId: 335994587
2020-09-16Cleanup device name confusion in packetimpact testbenchZeling Feng
There are two device names on the test net. - The sniffer/injector device which is always a linux device. Only the testbench library is interested in this device. - The device which is on the DUT. It happens to be the same device as the former if DUT is linux. An individual test might be interested in this device if the test cares about the device name. PiperOrigin-RevId: 332112968
2020-09-16Automated rollback of changelist 329526153Nayana Bidari
PiperOrigin-RevId: 332097286
2020-09-01Fix handling of unacceptable ACKs during close.Mithun Iyer
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
2020-09-01Automated rollback of changelist 328350576Nayana Bidari
PiperOrigin-RevId: 329526153
2020-08-25Support SO_LINGER socket option.Nayana Bidari
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
2020-08-14Give the ICMP Code its own typeJulian Elischer
This is a preparatory commit for a larger commit working on ICMP generation in error cases. This is removal of technical debt and cleanup in the gvisor code as part of gvisor issue 2211. Updates #2211. PiperOrigin-RevId: 326615389
2020-08-04Enable "make packetimpact-tests" to work.Adin Scannell
This required minor fixes to the bazel wrapper. The "dut_platform" is also changed to "native" to line-up with the system call tests and remove the hard-coded "linux" and "netstack" strings.
2020-07-27Ask for *testing.T instead of storing itJay Zhuang
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
2020-07-22make connect(2) fail when dest is unreachableKevin Krakauer
Previously, ICMP destination unreachable datagrams were ignored by TCP endpoints. This caused connect to hang when an intermediate router couldn't find a route to the host. This manifested as a Kokoro error when Docker IPv6 was enabled. The Ruby image test would try to install the sinatra gem and hang indefinitely attempting to use an IPv6 address. Fixes #3079.
2020-07-14Test IPv6 fragment reassemblyZeling Feng
A packetimpact test for: "A node must be able to accept a fragmented packet that, after reassembly, is as large as 1500 octets." PiperOrigin-RevId: 321210729
2020-07-14Add support for UDP IPv6Jay Zhuang
Also ironed out all the bugs found on the IPv6 code path that affects socket bind, send and receive. PiperOrigin-RevId: 321202653
2020-07-13Merge pull request #2672 from amscanne:shim-integratedgVisor bot
PiperOrigin-RevId: 321053634
2020-07-13Create packetimpact test for UDP broadcastJay Zhuang
PiperOrigin-RevId: 321000340
2020-06-26Support IPv6 extension headers in packetimpact tests.Zeling Feng
- IPv6 HopByHop Options Extension Header - IPv6 Destination Options Extension Header PiperOrigin-RevId: 318551425
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