Hi,
I used the following to capture the traffic on box A:
tcpdump -i bond0 -s0 'ip multicast' and 'host 224.0.26.5' and 'port 10005' -w
/tmp/11.2.pcap
Then, I used tcpwrite to change the MAC addresses on box B:
tcprewrite --infile=11.2.pcap --outfile=11.out.2.pcap --enet-smac=[my MAC
address for eth0] --enet-dmac=[my MAC address for eth0]
Then, I ran my application to join 224.0.26.5:10005 on box B, and tcpreplay-ed
the converted pcap file:
$ sudo tcpreplay -i eth0 -t 11.2.pcap
sending out eth0
processing file: 11.2.pcap
Actual: 3364 packets (311134 bytes) sent in 0.07 seconds. Rated:
4444771.5 bps, 33.91 Mbps, 48057.14 pps
Statistics for network device: eth0
Attempted packets: 3364
Successful packets: 3364
Failed packets: 0
Retried packets (ENOBUFS): 0
Retried packets (EAGAIN): 0
My application didn't see the traffic at all, but tcpdump captured all packets
(on box B as well):
$ sudo tcpdump -i eth0 -s0 'ip multicast' and 'host 224.0.26.5' and 'port
10005' -w /tmp/13.pcap
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
bytes
^C3364 packets captured
3364 packets received by filter
0 packets dropped by kernel
Here is my tcpreply version:
$ tcpreplay -V
tcpreplay version: 3.4.4 (build 2450)
Copyright 2000-2010 by Aaron Turner <aturner at synfin dot net>
Cache file supported: 04
Not compiled with libdnet.
Compiled against libpcap: 1.0.0
64 bit packet counters: enabled
Verbose printing via tcpdump: enabled
Packet editing: disabled
Fragroute engine: disabled
Injection method: PF_PACKET send()
I read this post:
http://sourceforge.net/mailarchive/forum.php?thread_name=CAMQJc%3D8Qan0VSH0dxWxoU_P%2BppYWhBjtw4jYvK7eAEqUy3hd4Q%40mail.gmail.com&forum_name=tcpreplay-users
It sounds like I can't tcpreplay the pcap file back to the same box as the
application that receives the replay traffic through multicast?
Any input is appreciated.
Thanks in advance.
Cheers,
Hei
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