Add call protocol, Rmux. Update AmneziaWG. Fixes and improvements

transport/call/common/ice.go

@@ -0,0 +1,58 @@
+package common
+
+import (
+	"net"
+	"strings"
+)
+
+func FixICEURL(iceURL string) string {
+	idx := strings.Index(iceURL, ":")
+	if idx < 0 {
+		return iceURL
+	}
+	scheme := iceURL[:idx]
+	if scheme != "turn" && scheme != "stun" && scheme != "turns" && scheme != "stuns" {
+		return iceURL
+	}
+	rest := iceURL[idx+1:]
+	if strings.HasPrefix(rest, "[") {
+		return iceURL
+	}
+	if strings.Count(rest, ":") <= 1 {
+		return iceURL
+	}
+	params := ""
+	if qm := strings.Index(rest, "?"); qm >= 0 {
+		params = rest[qm:]
+		rest = rest[:qm]
+	}
+	lastColon := strings.LastIndex(rest, ":")
+	if lastColon > 0 {
+		host := rest[:lastColon]
+		port := rest[lastColon+1:]
+		if net.ParseIP(host) != nil {
+			return scheme + ":[" + host + "]:" + port + params
+		}
+	}
+	if net.ParseIP(rest) != nil {
+		return scheme + ":[" + rest + "]" + params
+	}
+	return iceURL
+}
+
+func ExtractICEHost(iceURL string) string {
+	idx := strings.Index(iceURL, ":")
+	if idx < 0 {
+		return ""
+	}
+	rest := iceURL[idx+1:]
+	params := strings.Index(rest, "?")
+	if params >= 0 {
+		rest = rest[:params]
+	}
+	host, _, err := net.SplitHostPort(rest)
+	if err != nil {
+		return rest
+	}
+	return host
+}