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2021-10-18Merge release-20211005.0-52-g4f6cda4d0 (automated)gVisor bot
2021-10-18Support distinction for RWMutex and read-only locks.Adin Scannell
Fixes #6590 PiperOrigin-RevId: 404007524
2021-10-15Satisfy nogoGhanan Gowripalan
PiperOrigin-RevId: 403479257
2021-10-15Merge release-20211005.0-49-ge4fc15bd8 (automated)gVisor bot
2021-10-15Implement WriteRawPacket for pipeTony Gong
Implement WriteRawPacket for pipe by calling `DeliverNetworkPacket` on the other end with empty values for the route and protocol number, and relies on the `NetworkDispatcher` to decapsulate the link layer header from the raw packet itself. PiperOrigin-RevId: 403461448
2021-10-13Merge release-20210927.0-71-g4e2cc2bef (automated)gVisor bot
2021-10-13Minor fixes to sharedmem.Bhasker Hariharan
Use route/protocol from packetbuffer. Sharedmem implementation should use the EgressRoute/NetworkProtocolNumber embedded in the packetbuffer rather than what is passed as parameters to Write(Raw)Packet(s). PiperOrigin-RevId: 402934171
2021-10-13Merge release-20210927.0-70-g1796cd89d (automated)gVisor bot
2021-10-13add create-only raw socketsKevin Krakauer
These can be used by applications to manipulate iptables rules without enabling arbitrary reads from and writes to the underlying packet socket. PiperOrigin-RevId: 402924733
2021-10-13Merge release-20210927.0-68-gb74bbe11e (automated)gVisor bot
2021-10-13Represent direction with booleanGhanan Gowripalan
...since direction can only hold one of two possible values. PiperOrigin-RevId: 402855698
2021-10-13Merge release-20210927.0-67-g747cb9246 (automated)gVisor bot
2021-10-12Support Twice NATGhanan Gowripalan
This CL allows both SNAT and DNAT targets to be performed on the same packet. Fixes #5696. PiperOrigin-RevId: 402714738
2021-10-12Merge release-20210927.0-64-ge54ee7a99 (automated)gVisor bot
2021-10-12Create constants for Keepalive defaults.Bhasker Hariharan
Fixes #6725 PiperOrigin-RevId: 402683244
2021-10-12Merge release-20210927.0-63-g08f1d9616 (automated)gVisor bot
2021-10-12Separate DNAT and SNAT manip statesGhanan Gowripalan
This change also refactors the conntrack packet handling code to not perform the actual rewriting of the packet while holding the lock. This change prepares for a followup CL that adds support for twice-NAT. Updates #5696. PiperOrigin-RevId: 402671685
2021-10-12Merge release-20210927.0-59-gab1ef0bab (automated)gVisor bot
2021-10-11Support DNAT targetGhanan Gowripalan
PiperOrigin-RevId: 402468096
2021-10-11Add unit test for Redirect targetGhanan Gowripalan
We already have integration tests `make iptables-tests` that tests the REDIRECT target, but unit tests are a lot faster and easier to run than the integration test. PiperOrigin-RevId: 402365412
2021-10-11Merge release-20210927.0-56-g4ea18a8a7 (automated)gVisor bot
2021-10-11Support IP_PKTINFO and IPV6_RECVPKTINFO on raw socketsGhanan Gowripalan
Updates #1584, #3556. PiperOrigin-RevId: 402354066
2021-10-08Merge release-20210927.0-50-ge44b10065 (automated)gVisor bot
2021-10-07add convenient wrapper for eventfdKevin Krakauer
The same create/write/read pattern is copied around several places. It's easier to understand in a package with names and comments, and we can reuse the smart blocking code in package rawfile. PiperOrigin-RevId: 401647108
2021-10-07Merge release-20210927.0-49-g487651ac4 (automated)gVisor bot
2021-10-07Add a new metric to detect the number of spurious loss recoveries.Nayana Bidari
- Implements RFC 3522 (Eifel detection algorithm) to detect if the connection entered loss recovery unnecessarily. - Added a new metric to count the total number of spurious loss recoveries. - Added tests to verify the new metric. PiperOrigin-RevId: 401637359
2021-10-07Merge release-20210927.0-46-g3517d070c (automated)gVisor bot
2021-10-07Track UDP packets performing REDIRECT NATGhanan Gowripalan
PiperOrigin-RevId: 401620449
2021-10-07Modify the TCP test to receive re-transmitted packet before sending ACK.Nayana Bidari
TestRACKWithWindowFull was sending ACK for the last packet to avoid TLP. But, sometimes the ACK is delayed and the sender sends the re-transmitted packet before receiving ACK. The test is now modified to expect the re-transmitted packet always and then send a DSACK to avoid entering recovery. Before: http://sponge2/6473db18-137a-4afb-9d60-c3eafd236ea9 After: http://sponge2/6a0f744c-7ea3-40fa-8f76-68503bf142ca PiperOrigin-RevId: 401606848
2021-10-07Merge release-20210927.0-44-ga7045f051 (automated)gVisor bot
2021-10-07Store timestamps as time.TimeTamir Duberstein
Rather than boiling down to an integer eagerly, do it as late as possible. PiperOrigin-RevId: 401599308
2021-10-06Merge release-20210927.0-42-gdd74503b8 (automated)gVisor bot
2021-10-06Create null entry connection on first IPTables hookGhanan Gowripalan
...all connections should be tracked by ConnTrack, so create a no-op connection entry on the first hook into IPTables (Prerouting or Output) and let NAT targets modify the connection entry if they need to instead of letting the NAT target create their own connection entry. This also prepares for "twice-NAT" where a packet may have both DNAT and SNAT performed on it (which requires the ability to update ConnTrack entries). Updates #5696. PiperOrigin-RevId: 401360377
2021-10-05Merge release-20210927.0-32-g84063e88c (automated)gVisor bot
2021-10-05Add server implementation for sharedmem endpoints.Bhasker Hariharan
PiperOrigin-RevId: 401088040
2021-10-04Merge release-20210927.0-28-g6c1237da0 (automated)gVisor bot
2021-10-04Reply to invalid ACKs even when accept queue is fullArthur Sfez
Before checking if there is space in the accept queue, the listener should verify that the cookie is valid. If it is not, instead of silently dropping the packet, reply with an RST. Fixes #6683 PiperOrigin-RevId: 400807346
2021-10-02Merge release-20210921.0-58-g3bab5e566 (automated)gVisor bot
2021-10-01Read lock when getting connectionsGhanan Gowripalan
We should avoid taking the write lock to avoid contention when looking for a packet's tracked connection. No need to reap timed out connections when looking for connections as the reaper (which runs periodically) will handle that. PiperOrigin-RevId: 400322514
2021-10-01Merge release-20210921.0-57-g51c4fbb84 (automated)gVisor bot
2021-10-01Drop ConnTrack.handlePacketGhanan Gowripalan
Move the hook specific logic to the IPTables hook functions. This lets us avoid having to perform checks on the hook to determine what action to take. Later changes will drop the need for handlePacket's return value, reducing the value of this function that all hooks call into. PiperOrigin-RevId: 400298023
2021-10-01Merge release-20210921.0-56-g6e83c4b75 (automated)gVisor bot
2021-10-01Drop conn.tcbHookGhanan Gowripalan
...as the packet's direction gives us the information that tcbHook is used to derive. PiperOrigin-RevId: 400280102
2021-10-01Merge release-20210921.0-55-g8603cce51 (automated)gVisor bot
2021-10-01Annotate checklocks on mutex protected fieldsGhanan Gowripalan
...to catch lock-related bugs in nogo tests. Updates #6566. PiperOrigin-RevId: 400265818
2021-10-01Merge release-20210921.0-52-g788bbc290 (automated)gVisor bot
2021-10-01Drop IPTables.checkPacketsGhanan Gowripalan
...and have `CheckOutputPackets`, `CheckPostroutingPackets` call their equivalent methods that operate on a single packet buffer directly. This is so that the `Check{Output, Postrouting}Packets` methods may leverage any hook-specific work that `Check{Output, Postrouting}` may perform. Note: Later changes will add hook-specific logic to the `Check{Output, Postrouting}` methods. PiperOrigin-RevId: 400255651
2021-10-01Merge release-20210921.0-51-g807337000 (automated)gVisor bot
2021-10-01Let connection handle tracked packetsGhanan Gowripalan
...to save a call to `ConnTrack.connFor` when callers already have a reference to the ConnTrack entry. PiperOrigin-RevId: 400244955
2021-10-01Merge release-20210921.0-48-g0db2ab932 (automated)gVisor bot
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