30 Sep
2005
30 Sep
'05
9:43 a.m.
Hans Fugal <hans(a)fugal.net> writes:
Leonard paniq Ritter sent me a nifty patch for hearnet
some time ago. I
really dig it, and I finally got around to incorporating the patch and
releasing a new version. Here's what paniq has to say about it:
changed code so that it uses 32-voice polyphony and plays bridges /
chromatic orders.
as an effect, you get very harmonic sounds if packet sizes on a site
are the same, and quite weird stuff if packet sizes vary.
Go get it and see how much cooler it sounds!
http://hans.fugal.net/src/hearnet
Wow, I love this! Below is a patch to add filter expression
support to hearnet, so now you can say
./hearnet eth0 "udp port 53"
or whatever kind of filter expression you can think of. Very nice
for listening in on just specific traffic patterns!
--- hearnet-0.0.4/hearnet.cpp.orig 2005-09-23 03:02:40.000000000 +0200
+++ hearnet-0.0.4/hearnet.cpp 2005-09-30 13:36:26.000000000 +0200
@@ -163,7 +163,7 @@
{
fprintf(stderr,
"\n"
- "usage: hearnet [interface]\n"
+ "usage: hearnet [interface [filter-expression]]\n"
"Default interface is eth0.\n"
);
exit(1);
@@ -228,7 +228,15 @@
fprintf(stderr,"pcap_open_live; %s\n", perrbuf);
usage();
}
-
+
+ if (argc > 2) {
+ bpf_program bpfprog;
+ if (pcap_compile(hdl_pcap, &bpfprog, argv[2], 1, 0XFFFFFFFF) != -1) {
+ pcap_setfilter(hdl_pcap, &bpfprog);
+ } else {
+ printf("%s", pcap_geterr(hdl_pcap));
+ }
+ }
/*}}}*/
timeval tv_start;
--
CYa,
Mario