move call setLocalDescription position

[liaoxingang]

why

when I have to change local SDP,such as change "setup:active" to "setup:passive" in SDP callback. it's not working.

rtcSession.on('sdp', function (data) {
	if (data.originator== 'local' && data.type == 'answer') {
		data.sdp = data.sdp.replace("setup:active", "setup:passive");
	}
})

reason

when I change the SDP in SDP callback. send to server's SDP was changed but RTCConnection's SDP was not changed. because setLocalDescription before the callback function.

suggestion

move setLocalDescription after the SDP callback function