vendor: add package golib/net

vendor/github.com/fatedier/golib/net/mux/rule.go

@@ -0,0 +1,55 @@
+package mux
+
+type MatchFunc func(data []byte) (match bool)
+
+var (
+	HttpsNeedBytesNum uint32 = 1
+	HttpNeedBytesNum  uint32 = 3
+	YamuxNeedBytesNum uint32 = 2
+)
+
+var HttpsMatchFunc MatchFunc = func(data []byte) bool {
+	if len(data) < int(HttpsNeedBytesNum) {
+		return false
+	}
+
+	if data[0] == 0x16 {
+		return true
+	} else {
+		return false
+	}
+}
+
+// From https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods
+var httpHeadBytes = map[string]struct{}{
+	"GET": struct{}{},
+	"HEA": struct{}{},
+	"POS": struct{}{},
+	"PUT": struct{}{},
+	"DEL": struct{}{},
+	"CON": struct{}{},
+	"OPT": struct{}{},
+	"TRA": struct{}{},
+	"PAT": struct{}{},
+}
+
+var HttpMatchFunc MatchFunc = func(data []byte) bool {
+	if len(data) < int(HttpNeedBytesNum) {
+		return false
+	}
+
+	_, ok := httpHeadBytes[string(data[:3])]
+	return ok
+}
+
+// From https://github.com/hashicorp/yamux/blob/master/spec.md
+var YamuxMatchFunc MatchFunc = func(data []byte) bool {
+	if len(data) < int(YamuxNeedBytesNum) {
+		return false
+	}
+
+	if data[0] == 0 && data[1] >= 0x0 && data[1] <= 0x3 {
+		return true
+	}
+	return false
+}