src/main/java/com/alipay/remoting/util/RemotingUtil.java
public static String parseRemoteIP(final Channel channel) {
        if (null == channel) {
            return StringUtils.EMPTY;
        }
        final InetSocketAddress remote = (InetSocketAddress) channel.remoteAddress();
        if (remote != null) {
            return remote.getAddress().getHostAddress();
        }
        return StringUtils.EMPTY;
    }
public static String parseRemoteIP(final Channel channel) {
        if (null == channel) {
            return StringUtils.EMPTY;
        }
        final InetSocketAddress remote = (InetSocketAddress) channel.remoteAddress();
        if (remote != null) {
            return remote.getAddress().getHostAddress();
        }
        return StringUtils.EMPTY;
    }
public static String parseRemoteIP ( final Channel channel ) { if ( null == channel ) { return StringUtils . EMPTY ; } final InetSocketAddress remote = ( InetSocketAddress ) channel . remoteAddress ( ) ; if ( remote != null ) { return remote . getAddress ( ) . getHostAddress ( ) ; } return StringUtils . EMPTY ; }
Parse the remote host ip of the channel.

@param channel
@return
Parse the remote host ip of the channel .