diff options
| author | Ghanan Gowripalan <ghanan@google.com> | 2021-09-09 17:07:37 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-09-09 17:10:17 -0700 |
| commit | 2572af38860ed8a5aa37f0ad705a360628a4ed10 (patch) | |
| tree | 88f7ac7db4797b5d1437ed4cf9f0dc37bad57e70 /pkg/sentry | |
| parent | 833d933afda03706328ac556d08294a78e372a6a (diff) | |
Remove linux-compat loopback hacks from packet endpoint
Previously, gVisor did not represent loopback devices as an ethernet
device as Linux does. To maintain Linux API compatibility for packet
sockets, a workaround was used to add an ethernet header if a link
header was not already present in the packet buffer delivered to a
packet endpoint.
However, this workaround is a bug for non-ethernet based interfaces; not
all links use an ethernet header (e.g. pure L3/TUN interfaces).
As of 3b4bb947517d0d9010120aaa1c3989fd6abf278e, gVisor represents
loopback devices as an ethernet-based device so this workaround can
now be removed.
BUG: https://fxbug.dev/81592
Updates #6530, #6531.
PiperOrigin-RevId: 395819151
Diffstat (limited to 'pkg/sentry')
| -rw-r--r-- | pkg/sentry/socket/socket.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/pkg/sentry/socket/socket.go b/pkg/sentry/socket/socket.go index 83b9d9389..841d5bd55 100644 --- a/pkg/sentry/socket/socket.go +++ b/pkg/sentry/socket/socket.go @@ -743,6 +743,8 @@ func AddressAndFamily(addr []byte) (tcpip.FullAddress, uint16, *syserr.Error) { return tcpip.FullAddress{}, family, syserr.ErrInvalidArgument } a.UnmarshalUnsafe(addr[:sockAddrLinkSize]) + // TODO(https://gvisor.dev/issue/6530): Do not assume all interfaces have + // an ethernet address. if a.Family != linux.AF_PACKET || a.HardwareAddrLen != header.EthernetAddressSize { return tcpip.FullAddress{}, family, syserr.ErrInvalidArgument } |