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2020-01-04Merge release-20191213.0-59-g83ab47e (automated)gVisor bot
2020-01-03Use opaque interface identifiers when generating IPv6 addresses via SLAACGhanan Gowripalan
Support using opaque interface identifiers when generating IPv6 addresses via SLAAC when configured to do so. Note, this change does not handle retries in response to DAD conflicts yet. That will also come in a later change. Test: Test that when SLAAC addresses are generated, they use opaque interface identifiers when configured to do so. PiperOrigin-RevId: 288078605
2020-01-03Merge release-20191213.0-57-gd1d878a (automated)gVisor bot
2020-01-03Support generating opaque interface identifiers as defined by RFC 7217Ghanan Gowripalan
Support generating opaque interface identifiers as defined by RFC 7217 for auto-generated IPv6 link-local addresses. Opaque interface identifiers will also be used for IPv6 addresses auto-generated via SLAAC in a later change. Note, this change does not handle retries in response to DAD conflicts yet. That will also come in a later change. Tests: Test that when configured to generated opaque IIDs, they are properly generated as outlined by RFC 7217. PiperOrigin-RevId: 288035349
2019-12-31netstack: minor fix typo in "if err" handlerMarek Majkowski
2019-12-26Merge release-20191213.0-49-g87e4d03 (automated)gVisor bot
2019-12-26Automated rollback of changelist 287029703gVisor bot
PiperOrigin-RevId: 287217899
2019-12-24Merge release-20191213.0-48-ge013c48 (automated)gVisor bot
2019-12-24Enable IP_RECVTOS socket option for datagram socketsRyan Heacock
Added the ability to get/set the IP_RECVTOS socket option on UDP endpoints. If enabled, TOS from the incoming Network Header passed as ancillary data in the ControlMessages. 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 PiperOrigin-RevId: 287029703
2019-12-23Merge release-20191213.0-44-g5bc4ae9 (automated)gVisor bot
2019-12-23Clear any host-specific NDP state when becoming a routerGhanan Gowripalan
This change supports clearing all host-only NDP state when NICs become routers. All discovered routers, discovered on-link prefixes and auto-generated addresses will be invalidated when becoming a router. This is because normally, routers do not process Router Advertisements to discover routers or on-link prefixes, and do not do SLAAC. Tests: Unittest to make sure that all discovered routers, discovered prefixes and auto-generated addresses get invalidated when transitioning from a host to a router. PiperOrigin-RevId: 286902309
2019-12-20Merge release-20191213.0-39-g08c39e2 (automated)gVisor bot
2019-12-20Change TODO to track correct bug.Kevin Krakauer
PiperOrigin-RevId: 286639163
2019-12-19Merge release-20191213.0-32-g57ce26c (automated)gVisor bot
2019-12-18net/tcp: allow to call listen without bindAndrei Vagin
When listen(2) is called on an unbound socket, the socket is automatically bound to a random free port with the local address set to INADDR_ANY. PiperOrigin-RevId: 286305906
2019-12-18Merge release-20191213.0-27-g8e6e87f (automated)gVisor bot
2019-12-18Allow 'out-of-line' routing table updates for Router and Prefix discovery eventsGhanan Gowripalan
This change removes the requirement that a new routing table be provided when a router or prefix discovery event happens so that an updated routing table may be provided to the stack at a later time from the event. This change is to address the use case where the netstack integrator may need to obtain a lock before providing updated routes in response to the events above. As an example, say we have an integrator that performs the below two operations operations as described: A. Normal route update: 1. Obtain integrator lock 2. Update routes in the integrator 3. Call Stack.SetRouteTable with the updated routes 3.1. Obtain Stack lock 3.2. Update routes in Stack 3.3. Release Stack lock 4. Release integrator lock B. NDP event triggered route update: 1. Obtain Stack lock 2. Call event handler 2.1. Obtain integrator lock 2.2. Update routes in the integrator 2.3. Release integrator lock 2.4. Return updated routes to update Stack 3. Update routes in Stack 4. Release Stack lock A deadlock may occur if a Normal route update was attemped at the same time an NDP event triggered route update was attempted. With threads T1 and T2: 1) T1 -> A.1, A.2 2) T2 -> B.1 3) T1 -> A.3 (hangs at A.3.1 since Stack lock is taken in step 2) 4) T2 -> B.2 (hangs at B.2.1 since integrator lock is taken in step 1) Test: Existing tests were modified to not provide or expect routing table changes in response to Router and Prefix discovery events. PiperOrigin-RevId: 286274712
2019-12-18Cleanup NDP TestsGhanan Gowripalan
This change makes sure that test variables are captured before running tests in parallel, and removes unneeded buffered channel allocations. This change also removes unnecessary timeouts. PiperOrigin-RevId: 286255066
2019-12-17Merge release-20191210.0-37-g3f4d8fe (automated)gVisor bot
2019-12-17Internal change.gVisor bot
PiperOrigin-RevId: 286003946
2019-12-14Merge release-20191210.0-29-gad80dcf (automated)gVisor bot
2019-12-13Properly generate the EUI64 interface identifier from an Ethernet addressGhanan Gowripalan
Fixed a bug where the interface identifier was not properly generated from an Ethernet address. Tests: Unittests to make sure the functions generating the EUI64 interface identifier are correct. PiperOrigin-RevId: 285494562
2019-12-12Merge release-20191210.0-23-g6fc9f0a (automated)gVisor bot
2019-12-11Add support for TCP_USER_TIMEOUT option.Bhasker Hariharan
The implementation follows the linux behavior where specifying a TCP_USER_TIMEOUT will cause the resend timer to honor the user specified timeout rather than the default rto based timeout. Further it alters when connections are timedout due to keepalive failures. It does not alter the behavior of when keepalives are sent. This is as per the linux behavior. PiperOrigin-RevId: 285099795
2019-12-11Merge release-20191129.0-48-g0d02726 (automated)gVisor bot
2019-12-11Add additional packages to go branchMichael Pratt
We're missing several packages that runsc doesn't depend on. Most notable are several tcpip link packages. To find packages, I looked at a diff of directories on master vs go: $ bazel build //:gopath $ find bazel-bin/gopath/src/gvisor.dev/gvisor/ -type d > /tmp/gopath.txt $ find . -type d > /tmp/master.txt $ sed 's|bazel-bin/gopath/src/gvisor.dev/gvisor/||' < /tmp/gopath.txt > /tmp/gopath.trunc.txt $ sed 's|./||' < /tmp/master.txt > /tmp/master.trunc.txt $ vimdiff /tmp/gopath.trunc.txt /tmp/master.trunc.txt Testing packages are still left out because :gopath can't depend on testonly targets... PiperOrigin-RevId: 285049029
2019-12-11Merge release-20191129.0-41-g4ff71b5 (automated)gVisor bot
2019-12-10Inform the integrator on receipt of an NDP Recursive DNS Server optionGhanan Gowripalan
This change adds support to let an integrator know when it receives an NDP Router Advertisement message with the NDP Recursive DNS Server option with at least one DNS server's address. The stack will not maintain any state related to the DNS servers - the integrator is expected to maintain any required state and invalidate the servers after its valid lifetime expires, or refresh the lifetime when a new one is received for a known DNS server. Test: Unittest to make sure that an event is sent to the integrator when an NDP Recursive DNS Server option is received with at least one address. PiperOrigin-RevId: 284890502
2019-12-09Merge release-20191129.0-29-g18af75d (automated)gVisor bot
2019-12-09Add UDP SO_REUSEADDR support to the port manager.Ian Gudger
Next steps include adding support to the transport demuxer and the UDP endpoint. PiperOrigin-RevId: 284652151
2019-12-07Merge release-20191129.0-19-gb1d44be (automated)gVisor bot
2019-12-06Add TCP stats for connection close and keep-alive timeouts.Mithun Iyer
Fix bugs in updates to TCP CurrentEstablished stat. Fixes #1277 PiperOrigin-RevId: 284292459
2019-12-06Merge release-20191129.0-17-g3e84777 (automated)gVisor bot
2019-12-06Fix flakiness in tcp_test.Bhasker Hariharan
This change marks the socket as ESTABLISHED and creates the receiver and sender the moment we send the final ACK in case of an active TCP handshake or when we receive the final ACK for a passive TCP handshake. Before this change there was a short window in which an ACK can be received and processed but the state on the socket is not yet ESTABLISHED. This can be seen in TestConnectBindToDevice which is flaky because sometimes the socket is in SYN-SENT and not ESTABLISHED even though the other side has already received the final ACK of the handshake. PiperOrigin-RevId: 284277713
2019-12-06Merge release-20191129.0-15-gab3f7bc (automated)gVisor bot
2019-12-06Do IPv6 Stateless Address Auto-Configuration (SLAAC)Ghanan Gowripalan
This change allows the netstack to do SLAAC as outlined by RFC 4862 section 5.5. Note, this change will not break existing uses of netstack as the default configuration for the stack options is set in such a way that SLAAC will not be performed. See `stack.Options` and `stack.NDPConfigurations` for more details. This change reuses 1 option and introduces a new one that is required to take advantage of SLAAC, all available under NDPConfigurations: - HandleRAs: Whether or not NDP RAs are processes - AutoGenGlobalAddresses: Whether or not SLAAC is performed. Also note, this change does not deprecate SLAAC generated addresses after the preferred lifetime. That will come in a later change (b/143713887). Currently, only the valid lifetime is honoured. Tests: Unittest to make sure that SLAAC generates and adds addresses only when configured to do so. Tests also makes sure that conflicts with static addresses do not modify the static address. PiperOrigin-RevId: 284265317
2019-12-05Merge release-20191114.0-63-g10f7b10 (automated)gVisor bot
2019-12-05Add a type to represent the NDP Recursive DNS Server optionGhanan Gowripalan
This change adds a type to represent the NDP Recursive DNS Server option, as defined by RFC 8106 section 5.1. PiperOrigin-RevId: 284005493
2019-12-04Merge release-20191114.0-57-gcf7f27c (automated)gVisor bot
2019-12-03net/udp: return a local route address as the bound-to addressAndrei Vagin
If the socket is bound to ANY and connected to a loopback address, getsockname() has to return the loopback address. Without this fix, getsockname() returns ANY. PiperOrigin-RevId: 283647781
2019-12-03Merge release-20191114.0-55-g27e2c4d (automated)gVisor bot
2019-12-03Fix panic due to early transition to Closed.Bhasker Hariharan
The code in rcv.consumeSegment incorrectly transitions to CLOSED state from LAST-ACK before the final ACK for the FIN. Further if receiving a segment changes a socket to a closed state then we should not invoke the sender as the socket is now closed and sending any segments is incorrect. PiperOrigin-RevId: 283625300
2019-11-28Test handling segments on completed but not yet accepted TCP connectionsGhanan Gowripalan
This change does not introduce any new features, or modify existing ones. This change tests handling TCP segments right away for connections that were completed from a listening endpoint. PiperOrigin-RevId: 282986457
2019-11-28Merge release-20191114.0-41-g684f757 (automated)gVisor bot
2019-11-27Add support for receiving TOS and TCLASS control messages in hostinet.Dean Deng
This involves allowing getsockopt/setsockopt for the corresponding socket options, as well as allowing hostinet to process control messages received from the actual recvmsg syscall. PiperOrigin-RevId: 282851425
2019-11-25Merge release-20191114.0-28-g1641338 (automated)gVisor bot
2019-11-25Set transport and network headers on outbound packets.Kevin Krakauer
These are necessary for iptables to read and parse headers for packet filtering. PiperOrigin-RevId: 282372811
2019-11-25Merge release-20191114.0-27-g2b1b51f (automated)gVisor bot
2019-11-25Fix panic in sniffer.Kevin Krakauer
Packets written via SOCK_RAW are guaranteed to have network headers, but not transport headers. Check first whether there are enough bytes left in the packet to contain a transport header before attempting to parse it. PiperOrigin-RevId: 282363895
2019-11-23Cleanup visibility.Adin Scannell
PiperOrigin-RevId: 282194656
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