[Boost-users] Using Asio's ICMP support

Hi, Sorry if this is a silly question, but in Asio's ICMP support, what portion of an ICMP packet will an application supply when sending? What portion of an ICMP packet will an application retrieve when receiving? I get the impression that the whole body of the ICMP packet is supplied/retrieved (only an IP header with the ICMP protocol is prefixed). Is that the right impression? Thanks, David