http://radio.javaranch.com/balajidl/2006/02/06/1139245423141.html
//based on Axis 1.3
import org.apache.axis.Constants;
import org.apache.axis.MessageContext;
....
....
MessageContext messageContext = MessageContext.getCurrentContext();
String ipAddress = messageContext.getStrProp(Constants.MC_REMOTE_ADDR);