wip: migrate to mono-repo. SPN has already been moved to spn/

service/network/packet/const.go

@@ -0,0 +1,117 @@
+package packet
+
+import (
+	"errors"
+	"fmt"
+)
+
+// Basic Types.
+type (
+	// IPVersion represents an IP version.
+	IPVersion uint8
+	// IPProtocol represents an IP protocol.
+	IPProtocol uint8
+	// Verdict describes the decision on a packet.
+	Verdict uint8
+)
+
+// Basic Constants.
+const (
+	IPv4 = IPVersion(4)
+	IPv6 = IPVersion(6)
+
+	InBound  = true
+	OutBound = false
+
+	ICMP    = IPProtocol(1)
+	IGMP    = IPProtocol(2)
+	TCP     = IPProtocol(6)
+	UDP     = IPProtocol(17)
+	ICMPv6  = IPProtocol(58)
+	UDPLite = IPProtocol(136)
+	RAW     = IPProtocol(255)
+
+	AnyHostInternalProtocol61 = IPProtocol(61)
+)
+
+// Verdicts.
+const (
+	DROP Verdict = iota
+	BLOCK
+	ACCEPT
+	STOLEN
+	QUEUE
+	REPEAT
+	STOP
+)
+
+// ErrFailedToLoadPayload is returned by GetPayload if it failed for an unspecified reason, or is not implemented on the current system.
+var ErrFailedToLoadPayload = errors.New("could not load packet payload")
+
+// ByteSize returns the byte size of the ip (IPv4 = 4 bytes, IPv6 = 16).
+func (v IPVersion) ByteSize() int {
+	switch v {
+	case IPv4:
+		return 4
+	case IPv6:
+		return 16
+	}
+	return 0
+}
+
+// String returns the string representation of the IP version: "IPv4" or "IPv6".
+func (v IPVersion) String() string {
+	switch v {
+	case IPv4:
+		return "IPv4"
+	case IPv6:
+		return "IPv6"
+	}
+	return fmt.Sprintf("<unknown ip version, %d>", uint8(v))
+}
+
+// String returns the string representation (abbreviation) of the protocol.
+func (p IPProtocol) String() string {
+	switch p {
+	case RAW:
+		return "RAW"
+	case TCP:
+		return "TCP"
+	case UDP:
+		return "UDP"
+	case UDPLite:
+		return "UDPLite"
+	case ICMP:
+		return "ICMP"
+	case ICMPv6:
+		return "ICMPv6"
+	case IGMP:
+		return "IGMP"
+	case AnyHostInternalProtocol61:
+		fallthrough
+	default:
+		return fmt.Sprintf("<unknown protocol, %d>", uint8(p))
+	}
+}
+
+// String returns the string representation of the verdict.
+func (v Verdict) String() string {
+	switch v {
+	case DROP:
+		return "DROP"
+	case BLOCK:
+		return "BLOCK"
+	case ACCEPT:
+		return "ACCEPT"
+	case STOLEN:
+		return "STOLEN"
+	case QUEUE:
+		return "QUEUE"
+	case REPEAT:
+		return "REPEAT"
+	case STOP:
+		return "STOP"
+	default:
+		return fmt.Sprintf("<unsupported verdict, %d>", uint8(v))
+	}
+}