Fixes repeated calls to create an API object (#35816)

This patch fixes repeated attempts that the module would make to
re-create an API object. The change stores a copy for later lookup
instead. This prevents uncontrolled tokens from being created.

lib/ansible/module_utils/network/f5/bigip.py

@@ -27,7 +27,8 @@ except ImportError:
 class F5Client(F5BaseClient):
     @property
     def api(self):
-        result = None
+        if self._client:
+            return self._client
         for x in range(0, 10):
             try:
                 result = ManagementRoot(
@@ -38,13 +39,11 @@ class F5Client(F5BaseClient):
                     verify=self.params['validate_certs'],
                     token='tmos'
                 )
-                break
+                self._client = result
+                return self._client
             except Exception:
                 time.sleep(3)
-        if result:
-            return result
-        else:
-            raise F5ModuleError(
-                'Unable to connect to {0} on port {1}. '
-                'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
-            )
+        raise F5ModuleError(
+            'Unable to connect to {0} on port {1}. '
+            'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
+        )

lib/ansible/module_utils/network/f5/bigiq.py

@@ -27,7 +27,8 @@ except ImportError:
 class F5Client(F5BaseClient):
     @property
     def api(self):
-        result = None
+        if self._client:
+            return self._client
         for x in range(0, 10):
             try:
                 result = ManagementRoot(
@@ -38,13 +39,11 @@ class F5Client(F5BaseClient):
                     verify=self.params['validate_certs'],
                     token='local'
                 )
-                break
+                self._client = result
+                return self._client
             except Exception:
                 time.sleep(3)
-        if result:
-            return result
-        else:
-            raise F5ModuleError(
-                'Unable to connect to {0} on port {1}. '
-                'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
-            )
+        raise F5ModuleError(
+            'Unable to connect to {0} on port {1}. '
+            'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
+        )

lib/ansible/module_utils/network/f5/common.py

@@ -6,6 +6,8 @@
 from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
+import re
+
 from ansible.module_utils._text import to_text
 from ansible.module_utils.basic import env_fallback
 from ansible.module_utils.connection import exec_command
@@ -156,6 +158,31 @@ def is_cli(module):
     return result
 
 
+def is_valid_hostname(host):
+    """Reasonable attempt at validating a hostname
+
+    Compiled from various paragraphs outlined here
+    https://tools.ietf.org/html/rfc3696#section-2
+    https://tools.ietf.org/html/rfc1123
+
+    Notably,
+    * Host software MUST handle host names of up to 63 characters and
+      SHOULD handle host names of up to 255 characters.
+    * The "LDH rule", after the characters that it permits. (letters, digits, hyphen)
+    * If the hyphen is used, it is not permitted to appear at
+      either the beginning or end of a label
+
+    :param host:
+    :return:
+    """
+    if len(host) > 255:
+        return False
+    host = host.rstrip(".")
+    allowed = re.compile(r'(?!-)[A-Z0-9-]{1,63}(?<!-)$', re.IGNORECASE)
+    result = all(allowed.match(x) for x in host.split("."))
+    return result
+
+
 class Noop(object):
     """Represent no-operation required
 
@@ -174,6 +201,7 @@ class F5BaseClient(object):
     def __init__(self, *args, **kwargs):
         self.params = kwargs
         load_params(self.params)
+        self._client = None
 
     @property
     def api(self):
@@ -194,7 +222,7 @@ class F5BaseClient(object):
         :return:
         :raises iControlUnexpectedHTTPError
         """
-        self.api = self.mgmt
+        self._client = self.mgmt
 
 
 class AnsibleF5Parameters(object):
@@ -202,12 +230,17 @@ class AnsibleF5Parameters(object):
         self._values = defaultdict(lambda: None)
         self._values['__warnings'] = []
         self.client = kwargs.pop('client', None)
+        self._module = kwargs.pop('module', None)
+        self._params = {}
+
         params = kwargs.pop('params', None)
         if params:
             self.update(params=params)
+            self._params.update(params)
 
     def update(self, params=None):
         if params:
+            self._params.update(params)
             for k, v in iteritems(params):
                 if self.api_map is not None and k in self.api_map:
                     map_key = self.api_map[k]

lib/ansible/module_utils/network/f5/iworkflow.py

@@ -27,7 +27,8 @@ except ImportError:
 class F5Client(F5BaseClient):
     @property
     def api(self):
-        result = None
+        if self._client:
+            return self._client
         for x in range(0, 10):
             try:
                 result = ManagementRoot(
@@ -38,13 +39,11 @@ class F5Client(F5BaseClient):
                     verify=self.params['validate_certs'],
                     token='local'
                 )
-                break
+                self._client = result
+                return self._client
             except Exception:
                 time.sleep(3)
-        if result:
-            return result
-        else:
-            raise F5ModuleError(
-                'Unable to connect to {0} on port {1}. '
-                'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
-            )
+        raise F5ModuleError(
+            'Unable to connect to {0} on port {1}. '
+            'Is "validate_certs" preventing this?'.format(self.params['server'], self.params['server_port'])
+        )