Added rtcGetMaxDataChannelStream() to C API

include/rtc/rtc.h

@@ -190,6 +190,8 @@ RTC_EXPORT int rtcGetRemoteAddress(int pc, char *buffer, int size);
 RTC_EXPORT int rtcGetSelectedCandidatePair(int pc, char *local, int localSize, char *remote,
                                            int remoteSize);
 
+RTC_EXPORT int rtcGetMaxDataChannelStream(int pc);
+
 // DataChannel, Track, and WebSocket common API
 
 RTC_EXPORT int rtcSetOpenCallback(int id, rtcOpenCallbackFunc cb);

src/capi.cpp

@@ -614,6 +614,13 @@ int rtcGetSelectedCandidatePair(int pc, char *local, int localSize, char *remote
 	});
 }
 
+int rtcGetMaxDataChannelStream(int pc) {
+	return wrap([&] {
+		auto peerConnection = getPeerConnection(pc);
+		return int(peerConnection->maxDataChannelId());
+	});
+}
+
 int rtcSetOpenCallback(int id, rtcOpenCallbackFunc cb) {
 	return wrap([&] {
 		auto channel = getChannel(id);