Add iperf network test

This test is still broken due to
#499 and deactivated by
default.

tests/basic/network/Makefile

@@ -1,35 +1,56 @@
 include ../../common.mk
 
-CC_APP=/usr/bin/curl
-
+# Test1 - curl
+CURL_APP=/usr/bin/curl
 # The following used to access https://www.microsoft.com, but this fails
 # with Github issue https://github.com/lsds/sgx-lkl/issues/499. Other URLs
 # appear to work fine.
-CC_APP_CMDLINE=${CC_APP} --trace-ascii - https://www.wikipedia.org/
+CURL_APP_CMDLINE=${CURL_APP} --trace-ascii - https://www.wikipedia.org/
 
-CC_IMAGE_SIZE=128M
+# Test 2 - iperf
+# This test requires iperf3 to be installed on the host.
+IPERF_APP=/usr/bin/iperf3
+# The following iperf test still suffers from a problem in which the
+# throughput collapses to zero after a few seconds.
+IPERF_APP_CMDLINE=${IPERF_APP} -V -c 10.0.1.254 -t 60 -P 8
 
+CC_IMAGE_SIZE=64M
 CC_IMAGE=sgxlkl-alpine.img
-
 SGXLKL_ENV=SGXLKL_TAP=sgxlkl_tap0
 
-VERBOSE_OPTS=SGXLKL_VERBOSE=1 SGXLKL_KERNEL_VERBOSE=1
+VERBOSE_OPTS=SGXLKL_VERBOSE=1 SGXLKL_KERNEL_VERBOSE=1 SGXLKL_ETHREADS=8 SGXLKL_TRACE_LKL_SYSCALL=0 SGXLKL_TRACE_SIGNAL=0
 
 ifeq ($(SGXLKL_VERBOSE),)
 	SGXLKL_ENV+=${VERBOSE_OPTS}
 endif
 
 .DELETE_ON_ERROR:
-.PHONY: all clean run-hw run-sw
+.PHONY: all clean run-hw run-sw run-curl-hw run-curl-sw run-iperf-hw run-iperf-sw
 
 clean:
 	rm -f $(CC_IMAGE)
 
 $(CC_IMAGE):
-	${SGXLKL_DISK_TOOL} create --size=${CC_IMAGE_SIZE} --alpine="curl" ${CC_IMAGE}
+	${SGXLKL_DISK_TOOL} create --size=${CC_IMAGE_SIZE} --alpine="curl iperf3" ${CC_IMAGE}
+
+# Only run the curl test by default, as the iperf test is still broken.
+run-hw: run-curl-hw
+
+run-curl-hw: $(CC_IMAGE)
+	${SGXLKL_ENV} ${SGXLKL_STARTER} --hw-debug $(CC_IMAGE) $(CURL_APP_CMDLINE)
+
+run-iperf-hw: $(CC_IMAGE)
+	killall -q iperf3; iperf3 --server --daemon && sleep 2
+	${SGXLKL_ENV} ${SGXLKL_STARTER} --hw-debug $(CC_IMAGE) $(IPERF_APP_CMDLINE)
+	killall iperf3
+
+# Only runt the curl test by default, as the iperf test is still broken.
+run-sw: run-curl-sw
 
-run-hw: $(CC_IMAGE)
-	${SGXLKL_ENV} ${SGXLKL_STARTER} --hw-debug $(CC_IMAGE) $(CC_APP_CMDLINE)
+run-curl-sw: $(CC_IMAGE)
+	${SGXLKL_ENV} ${SGXLKL_STARTER} --sw-debug $(CC_IMAGE) $(CURL_APP_CMDLINE)
 
-run-sw: $(CC_IMAGE)
-	${SGXLKL_ENV} ${SGXLKL_STARTER} --sw-debug $(CC_IMAGE) $(CC_APP_CMDLINE)
+run-iperf-sw: $(CC_IMAGE)
+	killall -q iperf3; iperf3 --server --daemon && sleep 2
+	${SGXLKL_ENV} ${SGXLKL_STARTER} --sw-debug $(CC_IMAGE) $(IPERF_APP_CMDLINE)
+	killall iperf3