diff options
| author | Ghanan Gowripalan <ghanan@google.com> | 2019-10-28 18:19:12 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-10-28 18:20:36 -0700 |
| commit | 0864549ecc26e734bae3dcf40e0d761232f8bdad (patch) | |
| tree | 53f62d335d1053e07ba7004305086e83dfbc5417 /pkg/tcpip/stack | |
| parent | 198f1cddb82d46570ae63cb704b4a1b88cf0de1f (diff) | |
Use the user supplied TCP MSS when creating a new active socket
This change supports using a user supplied TCP MSS for new active TCP
connections. Note, the user supplied MSS must be less than or equal to the
maximum possible MSS for a TCP connection's route. If it is greater than the
maximum possible MSS, the maximum possible MSS will be used as the connection's
MSS instead.
This change does not use this user supplied MSS for connections accepted from
listening sockets - that will come in a later change.
Test: Test that outgoing TCP SYN segments contain a TCP MSS option with the user
supplied MSS if it is not greater than the maximum possible MSS for the route.
PiperOrigin-RevId: 277185125
Diffstat (limited to 'pkg/tcpip/stack')
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index a867f8c00..a01a208b8 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -89,6 +89,11 @@ func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, loopback // TODO(b/141011931): Validate a LinkEndpoint (ep) is valid. For // example, make sure that the link address it provides is a valid // unicast ethernet address. + + // TODO(b/143357959): RFC 8200 section 5 requires that IPv6 endpoints + // observe an MTU of at least 1280 bytes. Ensure that this requirement + // of IPv6 is supported on this endpoint's LinkEndpoint. + nic := &NIC{ stack: stack, id: id, |