First commit

binary.go

@@ -0,0 +1,58 @@
+package proxyprotocol
+
+// BinarySignature is magic prefix for proxyprotocol Binary
+var (
+	BinarySignature    = []byte{0x0D, 0x0A, 0x0D, 0x0A, 0x00, 0x0D, 0x0A, 0x51, 0x55, 0x49, 0x54, 0x0A}
+	BinarySignatureLen = len(BinarySignature)
+)
+
+// BinaryVersion2 bits
+const (
+	BinaryVersion2    byte = 0x20
+	BinaryVersionMask byte = 0xF0
+)
+
+// Commands
+const (
+	BinaryCommandLocal byte = 0x00
+	BinaryCommandProxy byte = 0x01
+	BinaryCommandMask  byte = 0x0F
+)
+
+// Address families
+const (
+	BinaryAFUnspec byte = 0x00
+	BinaryAFInet   byte = 0x10
+	BinaryAFInet6  byte = 0x20
+	BinaryAFUnix   byte = 0x30
+	BinaryAFMask   byte = 0xF0
+)
+
+// Transport protocols
+const (
+	BinaryTPUnspec byte = 0x00
+	BinaryTPStream byte = 0x01
+	BinaryTPDgram  byte = 0x02
+	BinaryTPMask   byte = 0x0F
+)
+
+// Protocol variants
+var (
+	BinaryProtocolUnspec       = BinaryAFUnspec | BinaryTPUnspec
+	BinaryProtocolTCPoverIPv4  = BinaryAFInet | BinaryTPStream
+	BinaryProtocolUDPoverIPv4  = BinaryAFInet | BinaryTPDgram
+	BinaryProtocolTCPoverIPv6  = BinaryAFInet6 | BinaryTPStream
+	BinaryProtocolUDPoverIPv6  = BinaryAFInet6 | BinaryTPDgram
+	BinaryProtocolUnixStream   = BinaryAFUnix | BinaryTPStream
+	BinaryProtocolUnixDatagram = BinaryAFUnix | BinaryTPDgram
+)
+
+// Expected address length
+var (
+	BinaryPortLen = 2
+)
+
+// TLV types
+const (
+	TLVTypeNoop byte = 0x04
+)