Merge pull request sonic-net#16 from ZhaohuiS/feature/caclmgrd_extern…

…al_client_warning_log

In sonic-net#9 , I added a new EXTERNAL_CLIENT table for supporting Restapi/gnmi control plane acls.
But if dest port is not defined, it will print traceback in syslog.
Avoiding this scenario, we add a default empty list for dst_ports and print a warning log and skip processing EXTERNAL_CLIENT table.

Signed-off-by: Zhaohui Sun zhaohuisun@microsoft.com

scripts/caclmgrd

@@ -551,6 +551,8 @@ class ControlPlaneAclManager(daemon_base.DaemonBase):
                 ip_protocols = self.ACL_SERVICES[acl_service]["ip_protocols"]
                 if "dst_ports" in self.ACL_SERVICES[acl_service]:
                     dst_ports = self.ACL_SERVICES[acl_service]["dst_ports"]
+                else:
+                    dst_ports = []
 
                 acl_rules = {}
 
@@ -604,6 +606,12 @@ class ControlPlaneAclManager(daemon_base.DaemonBase):
                     self.log_warning("Unable to determine if ACL table '{}' contains IPv4 or IPv6 rules. Skipping table..."
                                      .format(table_name))
                     continue
+                # If no destination port found for this ACL table,
+                # log a message and skip processing this table.
+                if len(dst_ports) == 0:
+                    self.log_warning("Required destination port not found for ACL table '{}'. Skipping table..."
+                                     .format(table_name))
+                    continue
                 ipv4_src_ip_set = set()
                 ipv6_src_ip_set = set()
                 # For each ACL rule in this table (in descending order of priority)