--offline                   replay TCP streams from the pcap file
--pcap-capture              capture packets at the data link
--pcap-send                 send packets at the data link layer instead of the IP layer
--with-pfring=PATH          set path to PF_RING library sources
--set-protocol-module=PATH  set tcpcopy to work for an external protocol module
--single                    if intercept and tcpcopy are both configured with "--single" option, 
                            only one tcpcopy works together with intercept, 
                            and better performance is achieved.
--with-tcmalloc             use tcmalloc instead of malloc
--with-debug                compile tcpcopy with debug support (saved in a log file)