diff options
| author | Tamir Duberstein <tamird@google.com> | 2020-06-10 11:24:20 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-06-10 11:25:58 -0700 |
| commit | f004bb8703b516a423e05111e8d0fc55b1a850d8 (patch) | |
| tree | a49161afa2191d4a7d2538f3d4b0e457c54f1e00 /pkg/tcpip/link/sniffer/sniffer.go | |
| parent | 9d2b2c121f700b87b3079b7d08b54b53f0634436 (diff) | |
Remove duplicate and incorrect size check
Minimum header sizes are already checked in each `case` arm below. Worse, the
ICMP entries in transportProtocolMinSizes are incorrect, and produce false "raw
packet" logs.
PiperOrigin-RevId: 315730073
Diffstat (limited to 'pkg/tcpip/link/sniffer/sniffer.go')
| -rw-r--r-- | pkg/tcpip/link/sniffer/sniffer.go | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/pkg/tcpip/link/sniffer/sniffer.go b/pkg/tcpip/link/sniffer/sniffer.go index 04982110a..f2e47b6a7 100644 --- a/pkg/tcpip/link/sniffer/sniffer.go +++ b/pkg/tcpip/link/sniffer/sniffer.go @@ -47,13 +47,6 @@ var LogPackets uint32 = 1 // LogPacketsToPCAP must be accessed atomically. var LogPacketsToPCAP uint32 = 1 -var transportProtocolMinSizes map[tcpip.TransportProtocolNumber]int = map[tcpip.TransportProtocolNumber]int{ - header.ICMPv4ProtocolNumber: header.IPv4MinimumSize, - header.ICMPv6ProtocolNumber: header.IPv6MinimumSize, - header.UDPProtocolNumber: header.UDPMinimumSize, - header.TCPProtocolNumber: header.TCPMinimumSize, -} - type endpoint struct { dispatcher stack.NetworkDispatcher lower stack.LinkEndpoint @@ -299,13 +292,6 @@ func logPacket(prefix string, protocol tcpip.NetworkProtocolNumber, pkt *stack.P return } - // We aren't guaranteed to have a transport header - it's possible for - // writes via raw endpoints to contain only network headers. - if minSize, ok := transportProtocolMinSizes[tcpip.TransportProtocolNumber(transProto)]; ok && vv.Size() < minSize { - log.Infof("%s %v -> %v transport protocol: %d, but no transport header found (possible raw packet)", prefix, src, dst, transProto) - return - } - // Figure out the transport layer info. transName := "unknown" srcPort := uint16(0) |