diff options
Diffstat (limited to 'pkg/tcpip/header/udp.go')
| -rw-r--r-- | pkg/tcpip/header/udp.go | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/pkg/tcpip/header/udp.go b/pkg/tcpip/header/udp.go index 31c8ef456..e8c860436 100644 --- a/pkg/tcpip/header/udp.go +++ b/pkg/tcpip/header/udp.go @@ -94,17 +94,11 @@ func (b UDP) SetChecksum(checksum uint16) { binary.BigEndian.PutUint16(b[udpChecksum:], checksum) } -// CalculateChecksum calculates the checksum of the udp packet, given the total -// length of the packet and the checksum of the network-layer pseudo-header -// (excluding the total length) and the checksum of the payload. -func (b UDP) CalculateChecksum(partialChecksum uint16, totalLen uint16) uint16 { - // Add the length portion of the checksum to the pseudo-checksum. - tmp := make([]byte, 2) - binary.BigEndian.PutUint16(tmp, totalLen) - checksum := Checksum(tmp, partialChecksum) - +// CalculateChecksum calculates the checksum of the udp packet, given the +// checksum of the network-layer pseudo-header and the checksum of the payload. +func (b UDP) CalculateChecksum(partialChecksum uint16) uint16 { // Calculate the rest of the checksum. - return Checksum(b[:UDPMinimumSize], checksum) + return Checksum(b[:UDPMinimumSize], partialChecksum) } // Encode encodes all the fields of the udp header. |