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
This change adds support to send NDP Router Solicitation messages when a NIC
becomes enabled as a host, as per RFC 4861 section 6.3.7.
Note, Router Solicitations will only be sent when the stack has forwarding
disabled.
Tests: Unittests to make sure that the initial Router Solicitations are sent
as configured. The tests also validate the sent Router Solicitations' fields.
PiperOrigin-RevId: 289964095
* Rename syncutil to sync.
* Add aliases to sync types.
* Replace existing usage of standard library sync package.
This will make it easier to swap out synchronization primitives. For example,
this will allow us to use primitives from github.com/sasha-s/go-deadlock to
check for lock ordering violations.
Updates #1472
PiperOrigin-RevId: 289033387
Internal tools timeout after 60s during tests that are required to pass before
changes can be submitted. Separate out NDP tests into its own package to help
prevent timeouts when testing.
PiperOrigin-RevId: 288990597
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
This change makes sure that when an address which is already known by a NIC and
has kind = permanentExpired gets promoted to permanent, the new
PrimaryEndpointBehavior is respected.
PiperOrigin-RevId: 276136317
This change adds support for Duplicate Address Detection on IPv6 addresses
as defined by RFC 4862 section 5.4.
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 DAD will not be
performed. See `stack.Options` and `stack.NDPConfigurations` for more details.
Tests: Tests to make sure that the DAD process properly resolves or fails.
That is, tests make sure that DAD resolves only if:
- No other node is performing DAD for the same address
- No other node owns the same address
PiperOrigin-RevId: 275189471
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
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
This allows the stack to learn remote link addresses on incoming
packets, reducing the need to ARP to send responses.
This also reduces the number of round trips to the system clock,
since that may also prove to be performance-sensitive.
Fixes#739.
PiperOrigin-RevId: 265815816
Nothing reads them and they can simply get stale.
Generated with:
$ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD
PiperOrigin-RevId: 231818945
Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
This option allows multiple sockets to be bound to the same port.
Incoming packets are distributed to sockets using a hash based on source and
destination addresses. This means that all packets from one sender will be
received by the same server socket.
PiperOrigin-RevId: 227153413
Change-Id: I59b6edda9c2209d5b8968671e9129adb675920cf
Currently sending a broadcast packet (for DHCP, e.g.) requires a "default
route" of the format "0.0.0.0/0 via 0.0.0.0 <intf>". There is no good reason
for this and on devices with several ports this creates a rather akward route
table with lots of such default routes (which defeats the purpose of a default
route).
PiperOrigin-RevId: 224378769
Change-Id: Icd7ec8a206eb08083cff9a837f6f9ab231c73a19
We have been unnecessarily creating too many savable types implicitly.
PiperOrigin-RevId: 206334201
Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8
gVisor bot
Ghanan Gowripalan
Adin Scannell
Ian Gudger
Kevin Krakauer
Bhasker Hariharan
Michael Pratt
Tamir Duberstein
Andrei Vagin
Chris Kuiper
Zhaozhong Ni
Nicolas Lacasse
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