X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FHoststackUtil.py;h=ad95d5114df02589d47156744e9c0e4ca64466e5;hb=refs%2Fchanges%2F52%2F24252%2F20;hp=9e6e20014cfcef38c0b005f2dffbb2c8401eb216;hpb=ac33ed374cb82c9258e4cf57e150f77750362bbc;p=csit.git

diff --git a/resources/libraries/python/HoststackUtil.py b/resources/libraries/python/HoststackUtil.py
index 9e6e20014c..ad95d5114d 100644
--- a/resources/libraries/python/HoststackUtil.py
+++ b/resources/libraries/python/HoststackUtil.py
@@ -15,6 +15,7 @@
 from time import sleep
 from robot.api import logger
 
+from resources.libraries.python.Constants import Constants
 from resources.libraries.python.ssh import exec_cmd, exec_cmd_no_error
 from resources.libraries.python.PapiExecutor import PapiSocketExecutor
 from resources.libraries.python.DUTSetup import DUTSetup
@@ -55,6 +56,49 @@ class HoststackUtil():
             vpp_echo_cmd[u"args"] += u" tx-results-diff"
         return vpp_echo_cmd
 
+    @staticmethod
+    def get_iperf3_command(iperf3_attributes):
+        """Construct the iperf3 command using the specified attributes.
+
+        :param iperf3_attributes: iperf3 test program attributes.
+        :type iperf3_attributes: dict
+        :returns: Command line components of the iperf3 command
+            'env_vars' - environment variables
+            'name' - program name
+            'args' - command arguments.
+        :rtype: dict
+        """
+        # TODO: Use a python class instead of dictionary for the return type
+        iperf3_cmd = {}
+        iperf3_cmd[u"env_vars"] = f"VCL_CONFIG={Constants.REMOTE_FW_DIR}/" \
+            f"{Constants.RESOURCES_TPL_VCL}/" \
+            f"{iperf3_attributes[u'vcl_config']}"
+        if iperf3_attributes[u"ld_preload"]:
+            iperf3_cmd[u"env_vars"] += \
+                f" LD_PRELOAD={Constants.VCL_LDPRELOAD_LIBRARY}"
+        if iperf3_attributes[u'transparent_tls']:
+            iperf3_cmd[u"env_vars"] += u" LDP_ENV_TLS_TRANS=1"
+
+        json_results = u" --json" if iperf3_attributes[u'json'] else u""
+        ip_address = f" {iperf3_attributes[u'ip_address']}" if u"ip_address" \
+                     in iperf3_attributes else u""
+        iperf3_cmd[u"name"] = u"iperf3"
+        iperf3_cmd[u"args"] = f"--{iperf3_attributes[u'role']}{ip_address} " \
+                              f"--interval 0{json_results} " \
+                              f"--version{iperf3_attributes[u'ip_version']}"
+
+        if iperf3_attributes[u"role"] == u"server":
+            iperf3_cmd[u"args"] += u" --one-off"
+        else:
+            iperf3_cmd[u"args"] += u" --get-server-output"
+            if u"parallel" in iperf3_attributes:
+                iperf3_cmd[u"args"] += \
+                    f" --parallel {iperf3_attributes[u'parallel']}"
+            if u"bytes" in iperf3_attributes:
+                iperf3_cmd[u"args"] += \
+                    f" --bytes {iperf3_attributes[u'bytes']}"
+        return iperf3_cmd
+
     @staticmethod
     def set_hoststack_quic_fifo_size(node, fifo_size):
         """Set the QUIC protocol fifo size.