packetforge: add option to show spec and mask only

In some cases with Generic FLow, it is only required to show the pattern
of spec and mask, but no need to add the flow. Therefore, add an option
in packetforge so that users can show spec and mask only.

Type: improvement

Signed-off-by: Ting Xu <ting.xu@intel.com>
Change-Id: I7b3040689eb82d0b58924712ee6fc9cfa0a42fa1

1 files changed, 66 insertions, 0 deletions

diff --git a/extras/packetforge/flow_parse.py b/extras/packetforge/flow_parse.py
new file mode 100644
index 00000000000..9b89282e153
--- /dev/null
+++ b/extras/packetforge/flow_parse.py
@@ -0,0 +1,66 @@
+# Copyright (c) 2022 Intel and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys, getopt
+import packetforge
+
+
+def Main(argv):
+    file_flag = False
+    operation = None
+    try:
+        opts, args = getopt.getopt(
+            argv,
+            "hf:p:a:i:I:",
+            [
+                "help",
+                "show",
+                "file=",
+                "pattern=",
+            ],
+        )
+    except getopt.GetoptError:
+        print("flow_parse.py --show -f <file> -p <pattern>")
+        sys.exit()
+    for opt, arg in opts:
+        if opt == "-h":
+            print("flow_parse.py --show -f <file> -p <pattern>")
+            sys.exit()
+        elif opt == "--show":
+            operation = "show"
+        elif opt in ("-f", "--file"):
+            json_file = arg
+            file_flag = True
+        elif opt in ("-p", "--pattern") and not file_flag:
+            pattern = arg
+
+    if operation == None:
+        print("Error: Please choose the operation: show")
+        sys.exit()
+
+    if not file_flag:
+        result = packetforge.Forge(pattern, None, False, True)
+    else:
+        result = packetforge.Forge(json_file, None, True, True)
+
+    return result
+
+
+if __name__ == "__main__":
+    # Parse the arguments
+    my_flow = Main(sys.argv[1:])
+
+    print(my_flow)
+
+# command example:
+# python flow_parse.py --show -p "mac()/ipv4(src=1.1.1.1,dst=2.2.2.2)/udp()"