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1275 |
phoenix |
How to use the Linux packet generator module.
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1. Enable CONFIG_NET_PKTGEN to compile and build pktgen.o, install it
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in the place where insmod may find it.
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2. Cut script "ipg" (see below).
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3. Edit script to set preferred device and destination IP address.
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3a. Create more scripts for different interfaces. Up to thirty-two
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pktgen processes can be configured and run at once by using the
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32 /proc/net/pktgen/pg* files.
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4. Run in shell: ". ipg"
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5. After this two commands are defined:
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A. "pg" to start generator and to get results.
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B. "pgset" to change generator parameters. F.e.
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pgset "multiskb 1" use multiple SKBs for packet generation
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pgset "multiskb 0" use single SKB for all transmits
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pgset "pkt_size 9014" sets packet size to 9014
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pgset "frags 5" packet will consist of 5 fragments
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pgset "count 200000" sets number of packets to send, set to zero
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for continious sends untill explicitly
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stopped.
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pgset "ipg 5000" sets artificial gap inserted between packets
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to 5000 nanoseconds
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pgset "dst 10.0.0.1" sets IP destination address
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(BEWARE! This generator is very aggressive!)
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pgset "dst_min 10.0.0.1" Same as dst
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pgset "dst_max 10.0.0.254" Set the maximum destination IP.
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pgset "src_min 10.0.0.1" Set the minimum (or only) source IP.
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pgset "src_max 10.0.0.254" Set the maximum source IP.
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pgset "dstmac 00:00:00:00:00:00" sets MAC destination address
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pgset "srcmac 00:00:00:00:00:00" sets MAC source address
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pgset "src_mac_count 1" Sets the number of MACs we'll range through. The
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'minimum' MAC is what you set with srcmac.
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pgset "dst_mac_count 1" Sets the number of MACs we'll range through. The
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'minimum' MAC is what you set with dstmac.
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pgset "flag [name]" Set a flag to determine behaviour. Current flags
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are: IPSRC_RND #IP Source is random (between min/max),
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IPDST_RND, UDPSRC_RND,
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UDPDST_RND, MACSRC_RND, MACDST_RND
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pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then
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cycle through the port range.
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pgset "udp_src_max 9" set UDP source port max.
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pgset "udp_dst_min 9" set UDP destination port min, If < udp_dst_max, then
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cycle through the port range.
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pgset "udp_dst_max 9" set UDP destination port max.
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pgset stop aborts injection
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Also, ^C aborts generator.
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---- cut here
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#! /bin/sh
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modprobe pktgen
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PGDEV=/proc/net/pktgen/pg0
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function pgset() {
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local result
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echo $1 > $PGDEV
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result=`cat $PGDEV | fgrep "Result: OK:"`
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if [ "$result" = "" ]; then
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cat $PGDEV | fgrep Result:
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fi
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}
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function pg() {
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echo inject > $PGDEV
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cat $PGDEV
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}
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pgset "odev eth0"
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pgset "dst 0.0.0.0"
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---- cut here
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