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2019-10-10Merge release-20190806.1-256-gbf870c1 (automated)gVisor bot
2019-10-09Internal change.gVisor bot
PiperOrigin-RevId: 273861936
2019-10-08Merge release-20190806.1-248-g016a269 (automated)gVisor bot
2019-10-08Merge release-20190806.1-247-g7c1587e (automated)gVisor bot
2019-10-07Implement IP_TTL.Ian Gudger
Also change the default TTL to 64 to match Linux. PiperOrigin-RevId: 273430341
2019-10-04Merge release-20190806.1-236-g4874525 (automated)gVisor bot
2019-10-03Implement proper local broadcast behaviorChris Kuiper
The behavior for sending and receiving local broadcast (255.255.255.255) traffic is as follows: Outgoing -------- * A broadcast packet sent on a socket that is bound to an interface goes out that interface * A broadcast packet sent on an unbound socket follows the route table to select the outgoing interface + if an explicit route entry exists for 255.255.255.255/32, use that one + else use the default route * Broadcast packets are looped back and delivered following the rules for incoming packets (see next). This is the same behavior as for multicast packets, except that it cannot be disabled via sockopt. Incoming -------- * Sockets wishing to receive broadcast packets must bind to either INADDR_ANY (0.0.0.0) or INADDR_BROADCAST (255.255.255.255). No other socket receives broadcast packets. * Broadcast packets are multiplexed to all sockets matching it. This is the same behavior as for multicast packets. * A socket can bind to 255.255.255.255:<port> and then receive its own broadcast packets sent to 255.255.255.255:<port> In addition, this change implicitly fixes an issue with multicast reception. If two sockets want to receive a given multicast stream and one is bound to ANY while the other is bound to the multicast address, only one of them will receive the traffic. PiperOrigin-RevId: 272792377
2019-09-30Merge release-20190806.1-213-gbcbb3ef (automated)gVisor bot
2019-09-30Add a Stringer implementation to PacketDispatchModeBhasker Hariharan
PiperOrigin-RevId: 272083936
2019-09-30Merge release-20190806.1-211-g61f6fbd (automated)gVisor bot
2019-09-30Fix bugs in PickEphemeralPort for TCP.Bhasker Hariharan
Netstack always picks a random start point everytime PickEphemeralPort is called. While this is required for UDP so that DNS requests go out through a randomized set of ports it is not required for TCP. Infact Linux explicitly hashes the (srcip, dstip, dstport) and a one time secret initialized at start of the application to get a random offset. But to ensure it doesn't start from the same point on every scan it uses a static hint that is incremented by 2 in every call to pick ephemeral ports. The reason for 2 is Linux seems to split the port ranges where active connects seem to use even ones while odd ones are used by listening sockets. This CL implements a similar strategy where we use a hash + hint to generate the offset to start the search for a free Ephemeral port. This ensures that we cycle through the available port space in order for repeated connects to the same destination and significantly reduces the chance of picking a recently released port. PiperOrigin-RevId: 272058370
2019-09-27Merge release-20190806.1-201-gabbee56 (automated)gVisor bot
2019-09-27Implement SO_BINDTODEVICE sockoptgVisor bot
PiperOrigin-RevId: 271644926
2019-09-25Merge release-20190806.1-183-g59ccbb1 (automated)gVisor bot
2019-09-25Remove centralized registration of protocols.Kevin Krakauer
Also removes the need for protocol names. PiperOrigin-RevId: 271186030
2019-09-24Merge release-20190806.1-177-g6704d62 (automated)gVisor bot
2019-09-24Return only primary addresses in Stack.NICInfo()Chris Kuiper
Non-primary addresses are used for endpoints created to accept multicast and broadcast packets, as well as "helper" endpoints (0.0.0.0) that allow sending packets when no proper address has been assigned yet (e.g., for DHCP). These addresses are not real addresses from a user point of view and should not be part of the NICInfo() value. Also see b/127321246 for more info. This switches NICInfo() to call a new NIC.PrimaryAddresses() function. To still allow an option to get all addresses (mostly for testing) I added Stack.GetAllAddresses() and NIC.AllAddresses(). In addition, the return value for GetMainNICAddress() was changed for the case where the NIC has no primary address. Instead of returning an error here, it now returns an empty AddressWithPrefix() value. The rational for this change is that it is a valid case for a NIC to have no primary addresses. Lastly, I refactored the code based on the new additions. PiperOrigin-RevId: 270971764
2019-09-24Merge release-20190806.1-174-gbbaaa1f (automated)gVisor bot
2019-09-24Simplify ICMPRateLimiterTamir Duberstein
https://github.com/golang/time/commit/c4c64ca added SetBurst upstream. PiperOrigin-RevId: 270925077
2019-09-23Merge release-20190806.1-168-g03ee55c (automated)gVisor bot
2019-09-23netstack: convert more socket options to {Set,Get}SockOptIntAndrei Vagin
PiperOrigin-RevId: 270763208
2019-09-20Merge release-20190806.1-164-g002f1d4 (automated)gVisor bot
2019-09-20Allow waiting for LinkEndpoint worker goroutines to finish.Ian Gudger
Previously, the only safe way to use an fdbased endpoint was to leak the FD. This change makes it possible to safely close the FD. This is the first step towards having stoppable stacks. Updates #837 PiperOrigin-RevId: 270346582
2019-09-17Merge release-20190806.1-153-g60fe871 (automated)gVisor bot
2019-09-17Automated rollback of changelist 268047073Ghanan Gowripalan
PiperOrigin-RevId: 269658971
2019-09-17Update remaining users of LinkEndpoints to not refer to them as an ID.Ian Gudger
PiperOrigin-RevId: 269614517
2019-09-13Merge release-20190806.1-142-g7c6ab6a (automated)gVisor bot
2019-09-12Implement splice methods for pipes and sockets.Adin Scannell
This also allows the tee(2) implementation to be enabled, since dup can now be properly supported via WriteTo. Note that this change necessitated some minor restructoring with the fs.FileOperations splice methods. If the *fs.File is passed through directly, then only public API methods are accessible, which will deadlock immediately since the locking is already done by fs.Splice. Instead, we pass through an abstract io.Reader or io.Writer, which elide locks and use the underlying fs.FileOperations directly. PiperOrigin-RevId: 268805207
2019-09-12Remove go_test from go_stateify and go_marshalMichael Pratt
They are no-ops, so the standard rule works fine. PiperOrigin-RevId: 268776264
2019-09-12Merge release-20190806.1-138-g857940d (automated)gVisor bot
2019-09-12Automated rollback of changelist 268047073Ghanan Gowripalan
PiperOrigin-RevId: 268757842
2019-09-09Merge 9dfcd8b0 (automated)gVisor bot
2019-09-09Fix ephemeral port leak.Ian Gudger
Fix a bug where udp.(*endpoint).Disconnect [accessible in gVisor via epsocket.(*SocketOperations).Connect with AF_UNSPEC] would leak a port reservation if the socket/endpoint had an ephemeral port assigned to it. glibc's getaddrinfo uses connect with AF_UNSPEC, causing each call of getaddrinfo to leak a port. Call getaddrinfo too many times and you run out of ports (shows up as connect returning EAGAIN and getaddrinfo returning EAI_NONAME "Name or service not known"). PiperOrigin-RevId: 268071160
2019-09-09Merge 6af9a985 (automated)gVisor bot
2019-09-09Join IPv6 all-nodes and solicited-node multicast addresses where appropriate.Ghanan Gowripalan
The IPv6 all-nodes multicast address will be joined on NIC enable, and the appropriate IPv6 solicited-node multicast address will be joined when IPv6 addresses are added. Tests: Test receiving packets destined to the IPv6 link-local all-nodes multicast address and the IPv6 solicted node address of an added IPv6 address. PiperOrigin-RevId: 268047073
2019-09-07Merge fe1f5210 (automated)gVisor bot
2019-09-06Remove reundant global tcpip.LinkEndpointID.Ian Gudger
PiperOrigin-RevId: 267709597
2019-09-05Merge fbbb2f7e (automated)gVisor bot
2019-09-04Fix RST generation bugs.Bhasker Hariharan
There are a few cases addressed by this change - We no longer generate a RST in response to a RST packet. - When we receive a RST we cleanup and release all reservations immediately as the connection is now aborted. - An ACK received by a listening socket generates a RST when SYN cookies are not in-use. The only reason an ACK should land at the listening socket is if we are using SYN cookies otherwise the goroutine for the handshake in progress should have gotten the packet and it should never have arrived at the listening endpoint. - Also fixes the error returned when a connection times out due to a Keepalive timer expiration from ECONNRESET to a ETIMEDOUT. PiperOrigin-RevId: 267238427
2019-09-04Handle subnet and broadcast addresses correctly with NIC.subnetsChris Kuiper
This also renames "subnet" to "addressRange" to avoid any more confusion with an interface IP's subnet. Lastly, this also removes the Stack.ContainsSubnet(..) API since it isn't used by anyone. Plus the same information can be obtained from Stack.NICAddressRanges(). PiperOrigin-RevId: 267229843
2019-09-04Merge 144127e5 (automated)gVisor bot
2019-09-03Validate IPv6 Hop Limit field for received NDP packetsGhanan Gowripalan
Make sure that NDP packets are only received if their IP header's hop limit field is set to 255, as per RFC 4861. PiperOrigin-RevId: 267061457
2019-09-03Merge 3789c34b (automated)gVisor bot
2019-09-03Make UDP traceroute work.Bhasker Hariharan
Adds support to generate Port Unreachable messages for UDP datagrams received on a port for which there is no valid endpoint. Fixes #703 PiperOrigin-RevId: 267034418
2019-09-03Merge 648170f5 (automated)gVisor bot
2019-09-02Remove duplicated file in pkg/tcpip/link/rawfile.Haibo Xu
The blockingpoll_unsafe.go was copied to blockingpoll_noyield_unsafe.go during merging commit 7206202bb9439499. If it still stay here, it would cause build errors on non-amd64 platform. ERROR: pkg/tcpip/link/rawfile/BUILD:5:1: GoCompilePkg pkg/tcpip/link/rawfile.a failed (Exit 1) builder failed: error executing command bazel-out/host/bin/external/go_sdk/builder compilepkg -sdk external/go_sdk -installsuffix linux_arm64 -src pkg/tcpip/link/rawfile/blockingpoll_noyield_unsafe.go -src ... (remaining 33 argument(s) skipped) Use --sandbox_debug to see verbose messages from the sandbox compilepkg: error running subcommand: exit status 2 pkg/tcpip/link/rawfile/blockingpoll_yield_unsafe.go:35:6: BlockingPoll redeclared in this block previous declaration at pkg/tcpip/link/rawfile/blockingpoll_unsafe.go:26:78 Target //pkg/tcpip/link/rawfile:rawfile failed to build Use --verbose_failures to see the command lines of failed build steps. INFO: Elapsed time: 25.531s, Critical Path: 21.08s INFO: 262 processes: 262 linux-sandbox. FAILED: Build did NOT complete successfully Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I4e21f82984225d0aa173de456f7a7c66053a053e
2019-08-31Merge f3dabdfc (automated)gVisor bot
2019-08-30Fix data race accessing referencedNetworkEndpoint.kindChris Kuiper
Wrapping "kind" into atomic access functions. Fixes #789 PiperOrigin-RevId: 266485501
2019-08-29Merge 863e11ac (automated)gVisor bot
2019-08-29Implement /proc/net/udp.Rahat Mahmood
PiperOrigin-RevId: 266229756
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