2.4.19

 Documentation

 networking

diff -urN linux-2.4.18/Documentation/networking/pktgen.txt linux-2.4.19/Documentation/networking/pktgen.txt
--- linux-2.4.18/Documentation/networking/pktgen.txt   Wed Dec 31 16:00:00 1969
+++ linux-2.4.19/Documentation/networking/pktgen.txt   Fri Aug  2 17:39:42 2002
@@ -0,0 +1,50 @@
+How to use the Linux packet generator module.
+
+1. Enable CONFIG_NET_PKTGEN to compile and build pktgen.o, install it
+   in the place where insmod may find it.
+2. Cut script "ipg" (see below).
+3. Edit script to set preferred device and destination IP address.
+4. Run in shell: ". ipg"
+5. After this two commands are defined:
+   A. "pg" to start generator and to get results.
+   B. "pgset" to change generator parameters. F.e.
+      pgset "multiskb 1"      use multiple SKBs for packet generation
+      pgset "multiskb 0"      use single SKB for all transmits
+      pgset "pkt_size 9014"   sets packet size to 9014
+      pgset "frags 5"         packet will consist of 5 fragments
+      pgset "count 200000"    sets number of packets to send
+      pgset "ipg 5000"        sets artificial gap inserted between packets
+                              to 5000 nanoseconds
+      pgset "dst 10.0.0.1"    sets IP destination address
+                              (BEWARE! This generator is very aggressive!)
+      pgset "dstmac 00:00:00:00:00:00"    sets MAC destination address
+      pgset stop             aborts injection
+      
+  Also, ^C aborts generator.
+
+---- cut here
+
+#! /bin/sh
+
+modprobe pktgen.o
+
+function pgset() {
+    local result
+
+    echo $1 > /proc/net/pg
+
+    result=`cat /proc/net/pg | fgrep "Result: OK:"`
+    if [ "$result" = "" ]; then
+         cat /proc/net/pg | fgrep Result:
+    fi
+}
+
+function pg() {
+    echo inject > /proc/net/pg
+    cat /proc/net/pg
+}
+
+pgset "odev eth0"
+pgset "dst 0.0.0.0"
+
+---- cut here