feat(wireguard): amneziawg implementation (#3150)

internal/wireguard/amnezia_settings.go

@@ -0,0 +1,58 @@
+package wireguard
+
+import (
+	"fmt"
+	"strings"
+)
+
+type AmneziaSettings struct {
+	JunkPacketCount uint16
+	JunkPacketMin   uint16
+	JunkPacketMax   uint16
+	PaddingS1       uint16
+	PaddingS2       uint16
+	PaddingS3       uint16
+	PaddingS4       uint16
+	HeaderH1        string
+	HeaderH2        string
+	HeaderH3        string
+	HeaderH4        string
+	InitPacketI1    string
+	InitPacketI2    string
+	InitPacketI3    string
+	InitPacketI4    string
+	InitPacketI5    string
+}
+
+func (s AmneziaSettings) uapiConfig() string {
+	uintFields := map[string]uint16{
+		"jc":   s.JunkPacketCount,
+		"jmin": s.JunkPacketMin,
+		"jmax": s.JunkPacketMax,
+		"s1":   s.PaddingS1,
+		"s2":   s.PaddingS2,
+		"s3":   s.PaddingS3,
+		"s4":   s.PaddingS4,
+	}
+	stringFields := map[string]string{
+		"h1": s.HeaderH1,
+		"h2": s.HeaderH2,
+		"h3": s.HeaderH3,
+		"h4": s.HeaderH4,
+		"i1": s.InitPacketI1,
+		"i2": s.InitPacketI2,
+		"i3": s.InitPacketI3,
+		"i4": s.InitPacketI4,
+		"i5": s.InitPacketI5,
+	}
+	lines := make([]string, 0, len(uintFields)+len(stringFields))
+
+	for key, val := range uintFields {
+		lines = append(lines, fmt.Sprintf("%s=%d", key, val))
+	}
+
+	for key, val := range stringFields {
+		lines = append(lines, key+"="+val)
+	}
+	return strings.Join(lines, "\n")
+}