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Test: integration_test.TestGetLinkAddress
PiperOrigin-RevId: 352119404
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stack.Route is used to send network packets and resolve link addresses.
A LinkEndpoint does not need to do either of these and only needs the
route's fields at the time of the packet write request.
Since LinkEndpoints only need the route's fields when writing packets,
pass a stack.RouteInfo instead.
PiperOrigin-RevId: 352108405
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The same intent can be specified via the io.Writer.
PiperOrigin-RevId: 352098747
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This change implements TLP details enumerated in
https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.5.2.
Fixes #5084
PiperOrigin-RevId: 352093473
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IPv4 previously accepts the packet, while IPv6 panics. Neither is the behavior
in Linux.
splice() in Linux has different behavior than in gVisor. This change documents
it in the SpliceTooLong test.
Reported-by: syzbot+b550e78e5c24d1d521f2@syzkaller.appspotmail.com
PiperOrigin-RevId: 352091286
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We loop over the list of packets anyways so setting these aren't
expensive.
Now that they are populated only by the link endpoint that uses them,
TCP does not need to.
PiperOrigin-RevId: 352090853
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Updates #5273
PiperOrigin-RevId: 352088736
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Otherwise, races can occur between concurrent logs.
PiperOrigin-RevId: 352086914
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PiperOrigin-RevId: 352068182
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io.Writer.Write requires err to be non-nil if n < len(v).
We could allow this but it will be irreversible if users depend on this
behavior.
Ported the test that discovered this.
PiperOrigin-RevId: 352065946
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Also fix test expectation for UDP sendto() case in tuntap syscall test.
Fixes #5155
PiperOrigin-RevId: 352056612
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PiperOrigin-RevId: 352032380
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- Remove the pipe package's dependence on the buffer package, which becomes
unused as a result. The buffer package is currently intended to serve two use
cases, pipes and temporary buffers, and does neither optimally as a result;
this change facilitates retooling the buffer package to better serve the
latter.
- Pass callbacks taking safemem.BlockSeq to the internal pipe I/O methods,
which makes most callbacks trivial.
- Fix VFS1's splice() and tee() to immediately return if a pipe returns a
partial write.
PiperOrigin-RevId: 351911375
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PiperOrigin-RevId: 351906812
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Fixes #4963
Startblock:
has LGTM from sbalana
and then
add reviewer ghanan
PiperOrigin-RevId: 351886320
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Return EEXIST when overwritting a file as long as the caller has exec
permission on the parent directory, even if the caller doesn't have
write permission.
Also reordered the mount write check, which happens before permission
is checked.
Closes #5164
PiperOrigin-RevId: 351868123
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Commit 25b5ec7 moved link address resolution out of the transport layer;
special handling of link address resolution is no longer necessary in tcp.
PiperOrigin-RevId: 351839254
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Note, this includes static entries to match linux's behaviour.
```
$ ip neigh show dev eth0
192.168.42.1 lladdr fc:ec:da:70:6e:f9 STALE
$ sudo ip neigh add 192.168.42.172 lladdr 22:33:44:55:66:77 dev eth0
$ ip neigh show dev eth0
192.168.42.1 lladdr fc:ec:da:70:6e:f9 STALE
192.168.42.172 lladdr 22:33:44:55:66:77 PERMANENT
$ sudo ifconfig eth0 down
$ ip neigh show dev eth0
$ sudo ifconfig eth0 up
$ ip neigh show dev eth0
```
Test: stack_test.TestClearNeighborCacheOnNICDisable
PiperOrigin-RevId: 351696306
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Link address resolution is performed at the link layer (if required) so
we can defer it from the transport layer. When link resolution is
required, packets will be queued and sent once link resolution
completes. If link resolution fails, the transport layer will receive a
control message indicating that the stack failed to route the packet.
tcpip.Endpoint.Write no longer returns a channel now that writes do not
wait for link resolution at the transport layer.
tcpip.ErrNoLinkAddress is no longer used so it is removed.
Removed calls to stack.Route.ResolveWith from the transport layer so
that link resolution is performed when a route is created in response
to an incoming packet (e.g. to complete TCP handshakes or send a RST).
Tests:
- integration_test.TestForwarding
- integration_test.TestTCPLinkResolutionFailure
Fixes #4458
RELNOTES: n/a
PiperOrigin-RevId: 351684158
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Whether the variable was found is already returned by syscall.Getenv.
os.Getenv drops this value while os.Lookupenv passes it along.
PiperOrigin-RevId: 351674032
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This is useful when using the shell library in order to log to both the test
log and the standard logs.
PiperOrigin-RevId: 351673465
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PiperOrigin-RevId: 351638451
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PiperOrigin-RevId: 351632484
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It is now composed by a NetworkInterface interface which lets us delete
the methods we don't need.
PiperOrigin-RevId: 351613267
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PiperOrigin-RevId: 351606635
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Rather than dumping metrics on a single line, nearly unrelated textproto, print
them in alphabetical order, each on their own line.
e.g.,
D0108 17:42:42.198216 3382465 metric.go:253] Emitting metrics:
D0108 17:42:42.198240 3382465 metric.go:255] /fs/opens: &{Uint64Value:22}
D0108 17:42:42.198271 3382465 metric.go:255] /fs/read_wait: &{Uint64Value:0}
D0108 17:42:42.198294 3382465 metric.go:255] /fs/reads: &{Uint64Value:26}
D0108 17:42:42.198319 3382465 metric.go:255] /gofer/opened_write_execute_file: &{Uint64Value:0}
D0108 17:42:42.198327 3382465 metric.go:255] /gofer/opens_9p: &{Uint64Value:0}
D0108 17:42:42.198340 3382465 metric.go:255] /gofer/opens_host: &{Uint64Value:20}
...
PiperOrigin-RevId: 351590340
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