man: trafgen: Add example program, rewritten using the trafgen functions

Show how the trafgen header generation functions can make a trafgen
script much more concise by rewritting Jesper's example using these
functions.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 13 insertions, 0 deletions

diff --git a/trafgen.8 b/trafgen.8
index 871ee05..300277b 100644
--- a/trafgen.8
+++ b/trafgen.8
@@ -647,6 +647,19 @@ Another real-world example by Jesper Dangaard Brouer [1]:
 .PP
    [1] http://thread.gmane.org/gmane.linux.network/257155
 .PP
+The above example rewritten using the header generation functions:
+.PP
+   {
+     # --- ethernet header ---
+     eth(da=00:1b:21:3c:9d:f8, da=90:e2:ba:0a:56:b4, proto=0x0800)
+     # --- ip header ---
+     ipv4(len=40, id=drnd(2), mf, ttl=64, proto=17, sa=192.168.51.1, da=192.168.51.2)
+     # --- udp header ---
+     udp(sport=48054, dport=43514, len=20, csum=0)
+     # payload
+     'A',  fill(0x41, 11),
+   }
+.PP
 .SH USAGE EXAMPLE
 .PP
 .SS trafgen --dev eth0 --conf trafgen.cfg