diff options
| author | Bhasker Hariharan <bhaskerh@google.com> | 2019-04-09 11:22:28 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-04-09 11:23:47 -0700 |
| commit | eaac2806ffadbb3db6317e58c61b855b1350f0aa (patch) | |
| tree | c0395952725697a475c3f7500ca64c8d5f9575b7 /pkg/tcpip/transport/tcp/endpoint.go | |
| parent | f18a8f958187aa52d028d1e3cc3dc0c03b742fed (diff) | |
Add TCP checksum verification.
PiperOrigin-RevId: 242704699
Change-Id: I87db368ca343b3b4bf4f969b17d3aa4ce2f8bd4f
Diffstat (limited to 'pkg/tcpip/transport/tcp/endpoint.go')
| -rw-r--r-- | pkg/tcpip/transport/tcp/endpoint.go | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go index 41c87cc7e..b5d05af7d 100644 --- a/pkg/tcpip/transport/tcp/endpoint.go +++ b/pkg/tcpip/transport/tcp/endpoint.go @@ -1447,6 +1447,13 @@ func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, vv return } + if !s.csumValid { + e.stack.Stats().MalformedRcvdPackets.Increment() + e.stack.Stats().TCP.ChecksumErrors.Increment() + s.decRef() + return + } + e.stack.Stats().TCP.ValidSegmentsReceived.Increment() if (s.flags & header.TCPFlagRst) != 0 { e.stack.Stats().TCP.ResetsReceived.Increment() @@ -1721,7 +1728,7 @@ func (e *endpoint) initGSO() { panic(fmt.Sprintf("Unknown netProto: %v", e.netProto)) } gso.NeedsCsum = true - gso.CsumOffset = header.TCPChecksumOffset() + gso.CsumOffset = header.TCPChecksumOffset gso.MaxSize = e.route.GSOMaxSize() e.gso = gso } |