Add runptf.sh script for basic forwarding PTF tests

Author: aqn96

exercises/basic/.gitignore

@@ -0,0 +1,4 @@
+build/
+ptf.log
+ptf.pcap
+ss-log.txt

exercises/basic/runptf.sh

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+#!/bin/bash
+# Run PTF tests for the basic forwarding exercise.
+# Tests run against the solution P4 program.
+
+# Path to p4runtime_shell_utils and testlib
+T="`realpath ~/p4-guide/testlib`"
+if [ x"${PYTHONPATH}" == "x" ]
+then
+    P="${T}"
+else
+    P="${T}:${PYTHONPATH}"
+fi
+
+set -x
+
+# Compile the solution P4 program into build directory
+mkdir -p build
+p4c --target bmv2 \
+    --arch v1model \
+    --p4runtime-files build/basic.p4info.txtpb \
+    -o build \
+    solution/basic.p4
+
+/bin/rm -f ss-log.txt
+
+# Start simple_switch_grpc with no P4 program loaded (loaded via P4Runtime)
+sudo simple_switch_grpc \
+     --log-file ss-log \
+     --log-flush \
+     --dump-packet-data 10000 \
+     -i 0@veth0 \
+     -i 1@veth2 \
+     -i 2@veth4 \
+     -i 3@veth6 \
+     -i 4@veth8 \
+     -i 5@veth10 \
+     -i 6@veth12 \
+     -i 7@veth14 \
+     --no-p4 &
+
+echo ""
+echo "Started simple_switch_grpc.  Waiting 2 seconds before starting PTF test ..."
+sleep 2
+
+# Run PTF tests
+sudo ${P4_EXTRA_SUDO_OPTS} `which ptf` \
+    --pypath "$P" \
+    -i 0@veth1 \
+    -i 1@veth3 \
+    -i 2@veth5 \
+    -i 3@veth7 \
+    -i 4@veth9 \
+    -i 5@veth11 \
+    -i 6@veth13 \
+    -i 7@veth15 \
+    --test-params="grpcaddr='localhost:9559';p4info='build/basic.p4info.txtpb';config='build/basic.json'" \
+    --test-dir ptf
+
+echo ""
+echo "PTF test finished.  Waiting 2 seconds before killing simple_switch_grpc ..."
+sleep 2
+sudo pkill --signal 9 --list-name simple_switch
+echo ""
+echo "Verifying that there are no simple_switch_grpc processes running any longer in 4 seconds ..."
+sleep 4
+ps axguwww | grep simple_switch