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https://github.com/edk2-porting/linux-next.git
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parse_simple.c - packet parser exapmle with single length check that filters out udp packets for port 9 parse_varlen.c - variable length parser that understand multiple vlan headers, ipip, ipip6 and ip options to filter out udp or tcp packets on port 9. The packet is parsed layer by layer with multitple length checks. parse_ldabs.c - classic style of packet parsing using LD_ABS instruction. Same functionality as parse_simple. simple = 24.1Mpps per core varlen = 22.7Mpps ldabs = 21.4Mpps Parser with LD_ABS instructions is slower than full direct access parser which does more packet accesses and checks. These examples demonstrate the choice bpf program authors can make between flexibility of the parser vs speed. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
38 lines
880 B
Bash
Executable File
38 lines
880 B
Bash
Executable File
#!/bin/bash
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function pktgen {
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../pktgen/pktgen_bench_xmit_mode_netif_receive.sh -i $IFC -s 64 \
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-m 90:e2:ba:ff:ff:ff -d 192.168.0.1 -t 4
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local dropped=`tc -s qdisc show dev $IFC | tail -3 | awk '/drop/{print $7}'`
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if [ "$dropped" == "0," ]; then
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echo "FAIL"
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else
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echo "Successfully filtered " $dropped " packets"
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fi
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}
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function test {
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echo -n "Loading bpf program '$2'... "
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tc qdisc add dev $IFC clsact
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tc filter add dev $IFC ingress bpf da obj $1 sec $2
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local status=$?
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if [ $status -ne 0 ]; then
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echo "FAIL"
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else
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echo "ok"
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pktgen
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fi
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tc qdisc del dev $IFC clsact
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}
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IFC=test_veth
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ip link add name $IFC type veth peer name pair_$IFC
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ip link set $IFC up
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ip link set pair_$IFC up
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test ./parse_simple.o simple
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test ./parse_varlen.o varlen
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test ./parse_ldabs.o ldabs
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ip link del dev $IFC
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