@Override
    public String getRemoteHost() {
        if (null != this.remotingCtx) {
            ChannelHandlerContext channelCtx = this.remotingCtx.getChannelContext();
            Channel channel = channelCtx.channel();
            if (null != channel) {
                return RemotingUtil.parseRemoteIP(channel);
            }
        }
        return "UNKNOWN_HOST";
    }
@see com.alipay.remoting.BizContext#getRemoteHost()
src/main/java/com/alipay/remoting/DefaultBizContext.java