ErrNoRoute gets translated to EHOSTUNREACH which causes some code paths to
produce different errors unexpectedly. Rename the error so we can clean up some
sites to return ENETUNREACH more clearly where needed.
Updates #8105
PiperOrigin-RevId: 482355099
This change implements AddMulticastRoute and the requisite routing logic.
Subsequent changes will still be needed to:
1. Emit events for missing route or unexpected input interface
2. Implement DelRoute
3. Implement GetRouteStats
Updates #7338.
PiperOrigin-RevId: 451026594
- Stub out sighandling functions with panics on Darwin
- Put Linux-specific errors into their own syserr file
Not sure how best to get automated tests running, so I'll leave that for a later
change.
Fixes#6839.
Related to #1270.
PiperOrigin-RevId: 409516969
Fix syzcaller panic SIGBUS on error handling. Done by
adding an interface, errors.GuestError, which errors can
implement in order to be compared against each other.
PiperOrigin-RevId: 393867554
Removes package syserror and moves still relevant code to either linuxerr
or to syserr (to be later removed).
Internal errors are converted from random types to *errors.Error types used
in linuxerr. Internal errors are in linuxerr/internal.go.
PiperOrigin-RevId: 390724202
Remove three syserror entries duplicated in linuxerr. Because of the
linuxerr.Equals method, this is a mere change of return values from
syserror to linuxerr definitions.
Done with only these three errnos as CLs removing all grow to a significantly
large size.
PiperOrigin-RevId: 382173835
Add Equals method to compare syserror and unix.Errno errors to linuxerr errors.
This will facilitate removal of syserror definitions in a followup, and
finding needed conversions from unix.Errno to linuxerr.
PiperOrigin-RevId: 380909667
The syscall package has been deprecated in favor of golang.org/x/sys.
Note that syscall is still used in the following places:
- pkg/sentry/socket/hostinet/stack.go: some netlink related functionalities
are not yet available in golang.org/x/sys.
- syscall.Stat_t is still used in some places because os.FileInfo.Sys() still
returns it and not unix.Stat_t.
Updates #214
PiperOrigin-RevId: 360701387
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
Read now takes a destination io.Writer, count, options. Keeping the method name
Read, in contrast to the Write method.
This enables:
* direct transfer of views under VV
* zero copy
It also eliminates the need for sentry to keep a slice of view because
userspace had requested a read that is smaller than the view returned, removing
the complexity there.
Read/Peek/ReadPacket are now consolidated together and some duplicate code is
removed.
PiperOrigin-RevId: 350636322
Earlier we could not save tcpip.Error objects in structs because upon restore
the constant's address changes in netstack's error translation map and
translating the error would panic because the map is based on the address of the
tcpip.Error instead of the error itself.
Now I made that translations map use the error message as key instead of the
address. Added relevant synchronization mechanisms to protect the structure
and initialize it upon restore.
PiperOrigin-RevId: 346590485
Packet sockets also seem to allow double binding and do not return an error on
linux. This was tested by running the syscall test in a linux namespace as root
and the current test DoubleBind fails@HEAD.
Passes after this change.
Updates #173
PiperOrigin-RevId: 321445137
Bruno Dal Bo
Nate Hurley
Kevin Krakauer
Zach Koopmans
Jamie Liu
Ayush Ranjan
Tamir Duberstein
Ghanan Gowripalan
Ting-Yu Wang
Adin Scannell
Bhasker Hariharan