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2020-02-26iptables: filter by IP address (and range)Kevin Krakauer
Enables commands such as: $ iptables -A INPUT -d 127.0.0.1 -j ACCEPT $ iptables -t nat -A PREROUTING ! -d 127.0.0.1 -j REDIRECT Also adds a bunch of REDIRECT+destination tests.
2020-02-21Implement tap/tun device in vfs.Ting-Yu Wang
PiperOrigin-RevId: 296526279
2020-02-21Attach LinkEndpoint to NetworkDispatcher immediatelyGhanan Gowripalan
Tests: stack_test.TestAttachToLinkEndpointImmediately PiperOrigin-RevId: 296474068
2020-02-21Use Route.MaxHeaderLength when constructing NDP RSGhanan Gowripalan
Test: stack_test.TestRouterSolicitation PiperOrigin-RevId: 296454766
2020-02-20Initial network namespace support.gVisor bot
TCP/IP will work with netstack networking. hostinet doesn't work, and sockets will have the same behavior as it is now. Before the userspace is able to create device, the default loopback device can be used to test. /proc/net and /sys/net will still be connected to the root network stack; this is the same behavior now. Issue #1833 PiperOrigin-RevId: 296309389
2020-02-20Support disabling a NICgVisor bot
- Disabled NICs will have their associated NDP state cleared. - Disabled NICs will not accept incoming packets. - Writes through a Route with a disabled NIC will return an invalid endpoint state error. - stack.Stack.FindRoute will not return a route with a disabled NIC. - NIC's Running flag will report the NIC's enabled status. Tests: - stack_test.TestDisableUnknownNIC - stack_test.TestDisabledNICsNICInfoAndCheckNIC - stack_test.TestRoutesWithDisabledNIC - stack_test.TestRouteWritePacketWithDisabledNIC - stack_test.TestStopStartSolicitingRouters - stack_test.TestCleanupNDPState - stack_test.TestAddRemoveIPv4BroadcastAddressOnNICEnableDisable - stack_test.TestJoinLeaveAllNodesMulticastOnNICEnableDisable PiperOrigin-RevId: 296298588
2020-02-18Fix mis-named comment.Kevin Krakauer
2020-02-18Enable IPV6_RECVTCLASS socket option for datagram socketsgVisor bot
Added the ability to get/set the IP_RECVTCLASS socket option on UDP endpoints. If enabled, traffic class from the incoming Network Header passed as ancillary data in the ControlMessages. Adding Get/SetSockOptBool to decrease the overhead of getting/setting simple options. (This was absorbed in a CL that will be landing before this one). Test: * Added unit test to udp_test.go that tests getting/setting as well as verifying that we receive expected TOS from incoming packet. * Added a syscall test for verifying getting/setting * Removed test skip for existing syscall test to enable end to end test. PiperOrigin-RevId: 295840218
2020-02-13We can now create and jump in iptables. For example:Kevin Krakauer
$ iptables -N foochain $ iptables -A INPUT -j foochain
2020-02-13Merge pull request #1791 from kevinGC:uchainsgVisor bot
PiperOrigin-RevId: 294957297
2020-02-13Internal change.gVisor bot
PiperOrigin-RevId: 294952610
2020-02-12iptables: User chainsKevin Krakauer
- Adds creation of user chains via `-N <chainname>` - Adds `-j RETURN` support for built-in chains, which triggers the chain's underflow rule (usually the default policy). - Adds tests for chain creation, default policies, and `-j RETURN' from built-in chains.
2020-02-11Disallow duplicate NIC names.gVisor bot
PiperOrigin-RevId: 294500858
2020-02-10Merge pull request #1775 from kevinGC:tcp-matchers-submitgVisor bot
PiperOrigin-RevId: 294340468
2020-02-06Send DAD event when DAD resolves immediatelyGhanan Gowripalan
Previously, a DAD event would not be sent if DAD was disabled. This allows integrators to do some work when an IPv6 address is bound to a NIC without special logic that checks if DAD is enabled. Without this change, integrators would need to check if a NIC has DAD enabled when an address is auto-generated. If DAD is enabled, it would need to delay the work until the DAD completion event; otherwise, it would need to do the work in the address auto-generated event handler. Test: stack_test.TestDADDisabled PiperOrigin-RevId: 293732914
2020-02-06Merge branch 'master' into tcp-matchers-submitKevin Krakauer
2020-02-06Auto-generate link-local address as a SLAAC addressGhanan Gowripalan
Auto-generated link-local addresses should have the same lifecycle hooks as global SLAAC addresses. The Stack's NDP dispatcher should be notified when link-local addresses are auto-generated and invalidated. They should also be removed when a NIC is disabled (which will be supported in a later change). Tests: - stack_test.TestNICAutoGenAddrWithOpaque - stack_test.TestNICAutoGenAddr PiperOrigin-RevId: 293706760
2020-02-06Perform DAD on IPv6 addresses when enabling a NICGhanan Gowripalan
Addresses may be added before a NIC is enabled. Make sure DAD is performed on the permanent IPv6 addresses when they get enabled. Test: - stack_test.TestDoDADWhenNICEnabled - stack.TestDisabledRxStatsWhenNICDisabled PiperOrigin-RevId: 293697429
2020-02-06Make gonet consistent both internally and with the net package.Ian Gudger
The types gonet.Conn and gonet.PacketConn were confusingly named as both implemented net.Conn. Further, gonet.Conn was perhaps unexpectedly TCP-specific (net.Conn is not). This change renames them to gonet.TCPConn and gonet.UDPConn. Renames gonet.NewListener to gonet.ListenTCP and adds a new gonet.NewTCPListner function to be consistent with both the gonet.DialXxx and gonet.NewXxxConn functions as well as net.ListenTCP. Updates #1632 PiperOrigin-RevId: 293671303
2020-02-06Update link address for targets of Neighbor AdvertsGhanan Gowripalan
Get the link address for the target of an NDP Neighbor Advertisement from the NDP Target Link Layer Address option. Tests: - ipv6.TestNeighorAdvertisementWithTargetLinkLayerOption - ipv6.TestNeighorAdvertisementWithInvalidTargetLinkLayerOption PiperOrigin-RevId: 293632609
2020-02-05Add notes to relevant tests.Adin Scannell
These were out-of-band notes that can help provide additional context and simplify automated imports. PiperOrigin-RevId: 293525915
2020-02-05recv() on a closed TCP socket returns ENOTCONNEyal Soha
From RFC 793 s3.9 p58 Event Processing: If RECEIVE Call arrives in CLOSED state and the user has access to such a connection, the return should be "error: connection does not exist" Fixes #1598 PiperOrigin-RevId: 293494287
2020-02-05Merge branch 'master' into tcp-matchers-submitKevin Krakauer
2020-02-04Support RTM_NEWADDR and RTM_GETLINK in (rt)netlink.Ting-Yu Wang
PiperOrigin-RevId: 293271055
2020-02-04Merge pull request #1683 from kevinGC:ipt-udp-matchersgVisor bot
PiperOrigin-RevId: 293243342
2020-02-04Add socket connection stress test.Ian Gudger
Tests 65k connection attempts on common types of sockets to check for port leaks. Also fixes a bug where dual-stack sockets wouldn't properly re-queue segments received while closing. PiperOrigin-RevId: 293241166
2020-01-31Fix method comment to match method name.Ian Gudger
PiperOrigin-RevId: 292624867
2020-01-31Use multicast Ethernet address for multicast NDPGhanan Gowripalan
As per RFC 2464 section 7, an IPv6 packet with a multicast destination address is transmitted to the mapped Ethernet multicast address. Test: - ipv6.TestLinkResolution - stack_test.TestDADResolve - stack_test.TestRouterSolicitation PiperOrigin-RevId: 292610529
2020-01-31iptables: enable TCP matching with "-m tcp".Kevin Krakauer
A couple other things that changed: - There's a proper extension registration system for matchers. Anyone adding another matcher can use tcp_matcher.go or udp_matcher.go as a template. - All logging and use of syserr.Error in the netfilter package happens at the highest possible level (public functions). Lower-level functions just return normal, descriptive golang errors.
2020-01-31Extract multicast IP to Ethernet address mappingGhanan Gowripalan
Test: header.TestEthernetAddressFromMulticastIPAddress PiperOrigin-RevId: 292604649
2020-01-30Merge branch 'master' into ipt-udp-matchersKevin Krakauer
2020-01-30Fix for panic in endpoint.Close().Bhasker Hariharan
When sending a RST on shutdown we need to double check the state after acquiring the work mutex as the endpoint could have transitioned out of a connected state from the time we checked it and we acquired the workMutex. I added two tests but sadly neither reproduce the panic. I am going to leave the tests in as they are good to have anyway. PiperOrigin-RevId: 292393800
2020-01-30Do not include the Source Link Layer option with an unspecified source addressGhanan Gowripalan
When sending NDP messages with an unspecified source address, the Source Link Layer address must not be included. Test: stack_test.TestDADResolve PiperOrigin-RevId: 292341334
2020-01-29Do not spawn a goroutine when calling stack.NDPDispatcher's methodsGhanan Gowripalan
Do not start a new goroutine when calling stack.NDPDispatcher.OnDuplicateAddressDetectionStatus. PiperOrigin-RevId: 292268574
2020-01-29Add support for TCP_DEFER_ACCEPT.Bhasker Hariharan
PiperOrigin-RevId: 292233574
2020-01-29Merge branch 'master' into ipt-udp-matchersKevin Krakauer
2020-01-28Update link address for senders of Neighbor SolicitationsGhanan Gowripalan
Update link address for senders of NDP Neighbor Solicitations when the NS contains an NDP Source Link Layer Address option. Tests: - ipv6.TestNeighorSolicitationWithSourceLinkLayerOption - ipv6.TestNeighorSolicitationWithInvalidSourceLinkLayerOption PiperOrigin-RevId: 292028553
2020-01-28Include the NDP Source Link Layer option when sending DAD messagesGhanan Gowripalan
Test: stack_test.TestDADResolve PiperOrigin-RevId: 292003124
2020-01-27Add a type to represent the NDP Source Link Layer Address optionGhanan Gowripalan
Tests: - header.TestNDPSourceLinkLayerAddressOptionEthernetAddress - header.TestNDPSourceLinkLayerAddressOptionSerialize - header.TestNDPOptionsIterCheck - header.TestNDPOptionsIter PiperOrigin-RevId: 291856429
2020-01-27Merge pull request #1676 from majek:marek/FIX-1632-expose-NewPacketConngVisor bot
PiperOrigin-RevId: 291803499
2020-01-27Fix licenses.Adin Scannell
The preferred Copyright holder is "The gVisor Authors". PiperOrigin-RevId: 291786657
2020-01-27Update ChecksumVVWithoffset to use unrolled version.Bhasker Hariharan
Fixes #1656 PiperOrigin-RevId: 291777279
2020-01-27Refactor to hide C from channel.Endpoint.Ting-Yu Wang
This is to aid later implementation for /dev/net/tun device. PiperOrigin-RevId: 291746025
2020-01-27More cleanup.Kevin Krakauer
2020-01-27Cleanup for GH review.Kevin Krakauer
2020-01-27Standardize on tools directory.Adin Scannell
PiperOrigin-RevId: 291745021
2020-01-27Merge branch 'master' into ipt-udp-matchersKevin Krakauer
2020-01-27Expose gonet.NewPacketConn, for parity with gonet.NewConn APIMarek Majkowski
gonet.Conn can be created with both gonet.NewConn and gonet.Dial. gonet.PacketConn was created only by gonet.DialUDP. This prevented us from being able to use PacketConn in udp.NewForwarder() context. This simple constructor - NewPacketConn, allows user to create correct structure from that context.
2020-01-27Replace calculateChecksum w/ the unrolled version.Bhasker Hariharan
Fixes #1656 PiperOrigin-RevId: 291703760
2020-01-26Unroll checksum computation loop.Bhasker Hariharan
Checksum computation is one of the most expensive bits of packet processing. Manual unrolling of the loop provides significant improvement in checksum speed. Updates #1656 BenchmarkChecksum/checksum_64-12 49834124 23.6 ns/op BenchmarkChecksum/checksum_128-12 27111997 44.1 ns/op BenchmarkChecksum/checksum_256-12 11416683 91.5 ns/op BenchmarkChecksum/checksum_512-12 6375298 174 ns/op BenchmarkChecksum/checksum_1024-12 3403852 338 ns/op BenchmarkChecksum/checksum_1500-12 2343576 493 ns/op BenchmarkChecksum/checksum_2048-12 1730521 656 ns/op BenchmarkChecksum/checksum_4096-12 920469 1327 ns/op BenchmarkChecksum/checksum_8192-12 445885 2637 ns/op BenchmarkChecksum/checksum_16384-12 226342 5268 ns/op BenchmarkChecksum/checksum_32767-12 114210 10503 ns/op BenchmarkChecksum/checksum_32768-12 99138 10610 ns/op BenchmarkChecksum/checksum_65535-12 53438 21158 ns/op BenchmarkChecksum/checksum_65536-12 52993 21067 ns/op BenchmarkUnrolledChecksum/checksum_64-12 61035639 19.1 ns/op BenchmarkUnrolledChecksum/checksum_128-12 36067015 33.6 ns/op BenchmarkUnrolledChecksum/checksum_256-12 19731220 60.4 ns/op BenchmarkUnrolledChecksum/checksum_512-12 9091291 116 ns/op BenchmarkUnrolledChecksum/checksum_1024-12 4976406 226 ns/op BenchmarkUnrolledChecksum/checksum_1500-12 3685224 328 ns/op BenchmarkUnrolledChecksum/checksum_2048-12 2579108 447 ns/op BenchmarkUnrolledChecksum/checksum_4096-12 1350475 887 ns/op BenchmarkUnrolledChecksum/checksum_8192-12 658248 1780 ns/op BenchmarkUnrolledChecksum/checksum_16384-12 335869 3534 ns/op BenchmarkUnrolledChecksum/checksum_32767-12 168650 7095 ns/op BenchmarkUnrolledChecksum/checksum_32768-12 168075 7098 ns/op BenchmarkUnrolledChecksum/checksum_65535-12 75085 14277 ns/op BenchmarkUnrolledChecksum/checksum_65536-12 75921 14127 ns/op PiperOrigin-RevId: 291643290
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