[Tip] PF/bridge connection kill

[Jung]

hi all

pfctl -k does kill a only state. it doesn't connection kill.

so, At yesterday i tested a tcpkill in dsniff on my test PF/bridge firewall.

tcp connection kill is a useful on PF. 
  

examples on PF/bridge)
pfctl -ss | grep xxx.xxx.xxx.xxx
                  ( search clent ip in state table)                          
                                      
tcpkill -i fxp1 src host xxx.xxx.xxx.xxx and dst host xxx.xxx.xxx.xxx
                         ( server ip)                 ( client ip)                     
                   

dsniff patch for PF/bridge)
--- pcaputil.c.orig     Sat Nov 30 01:44:27 2002
+++ pcaputil.c  Sat Nov 30 01:48:29 2002
@@ -73,7 +73,9 @@
        }
        if (pcap_lookupnet(intf, &net, &mask, ebuf) == -1) {
                warnx("%s", ebuf);
-               return (NULL);
+               /* required for IP less machine */
+               net = 0;
+               mask = 0;
        }
        if (pcap_compile(pd, &fcode, filter, 1, mask) < 0) {
                pcap_perror(pd, "pcap_compile");