FD.io VPP  v19.08-24-ge6a5712
Vector Packet Processing
acl_binding.hpp
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1 /*
2  * Copyright (c) 2017 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef __VOM_ACL_BINDING_H__
17 #define __VOM_ACL_BINDING_H__
18 
19 #include <ostream>
20 
21 #include "vom/acl_l2_list.hpp"
22 #include "vom/acl_l3_list.hpp"
23 #include "vom/acl_types.hpp"
24 #include "vom/hw.hpp"
25 #include "vom/inspect.hpp"
26 #include "vom/interface.hpp"
27 #include "vom/object_base.hpp"
28 #include "vom/om.hpp"
29 #include "vom/singular_db.hpp"
31 
32 namespace VOM {
33 namespace ACL {
34 /**
35  * A binding between an ACL and an interface.
36  * A representation of the application of the ACL to the interface.
37  */
38 template <typename LIST>
39 class binding : public object_base
40 {
41 public:
42  /**
43  * The key for a binding is the direction and the interface
44  */
45  typedef std::pair<direction_t, interface::key_t> key_t;
46 
47  /**
48  * Construct a new object matching the desried state
49  */
50  binding(const direction_t& direction, const interface& itf, const LIST& acl)
51  : m_direction(direction)
52  , m_itf(itf.singular())
53  , m_acl(acl.singular())
54  , m_binding(false)
55  {
56  m_evh.order();
57  }
58 
59  /**
60  * Copy Constructor
61  */
62  binding(const binding& o)
63  : m_direction(o.m_direction)
64  , m_itf(o.m_itf)
65  , m_acl(o.m_acl)
66  , m_binding(o.m_binding)
67  {
68  }
69 
70  /**
71  * Destructor
72  */
74  {
75  sweep();
76  m_db.release(std::make_pair(m_direction, m_itf->key()), this);
77  }
78 
79  /**
80  * Return the 'singular instance' of the L2 config that matches this
81  * object
82  */
83  std::shared_ptr<binding> singular() const { return find_or_add(*this); }
84 
85  /**
86  * convert to string format for debug purposes
87  */
88  std::string to_string() const
89  {
90  std::ostringstream s;
91  s << "acl-binding:[" << m_direction.to_string() << " " << m_itf->to_string()
92  << " " << m_acl->to_string() << " " << m_binding.to_string() << "]";
93 
94  return (s.str());
95  }
96 
97  /**
98  * Dump all bindings into the stream provided
99  */
100  static void dump(std::ostream& os) { m_db.dump(os); }
101 
102  static dependency_t order() { return m_evh.order(); }
103 
104 private:
105  /**
106  * Class definition for listeners to OM events
107  */
109  {
110  public:
111  event_handler();
112 
113  virtual ~event_handler() = default;
114 
115  /**
116  * Handle a populate event
117  */
118  void handle_populate(const client_db::key_t& key);
119 
120  /**
121  * Handle a replay event
122  */
123  void handle_replay() { m_db.replay(); }
124 
125  /**
126  * Show the object in the Singular DB
127  */
128  void show(std::ostream& os) { db_dump(m_db, os); }
129 
130  /**
131  * Get the sortable Id of the listener
132  */
133  dependency_t order() const;
134  };
135 
136  /**
137  * event_handler to register with OM
138  */
139  static event_handler m_evh;
140 
141  /**
142  * Enquue commonds to the VPP command Q for the update
143  */
144  void update(const binding& obj);
145 
146  /**
147  * Find or Add the instance in the DB
148  */
149  static std::shared_ptr<binding> find_or_add(const binding& temp)
150  {
151  return (m_db.find_or_add(
152  std::make_pair(temp.m_direction, temp.m_itf->key()), temp));
153  }
154 
155  /*
156  * It's the OM class that calls singular()
157  */
158  friend class VOM::OM;
159 
160  /**
161  * It's the singular_db class that calls replay()
162  */
163  friend class singular_db<key_t, binding>;
164 
165  /**
166  * Sweep/reap the object if still stale
167  */
168  void sweep(void);
169 
170  /**
171  * Replay the objects state to HW
172  */
173  void replay(void);
174 
175  /**
176  * The direction the of the packets on which to apply the ACL
177  * input or output
178  */
179  const direction_t m_direction;
180 
181  /**
182  * A reference counting pointer the interface that this L3 layer
183  * represents. By holding the reference here, we can guarantee that
184  * this object will outlive the interface
185  */
186  const std::shared_ptr<interface> m_itf;
187 
188  /**
189  * A reference counting pointer the ACL that this
190  * interface is bound to. By holding the reference here, we can
191  * guarantee that this object will outlive the BD.
192  */
193  const std::shared_ptr<LIST> m_acl;
194 
195  /**
196  * HW configuration for the binding. The bool representing the
197  * do/don't bind.
198  */
199  HW::item<bool> m_binding;
200 
201  /**
202  * A map of all L2 interfaces key against the interface's handle_t
203  */
204  static singular_db<key_t, binding> m_db;
205 };
206 
207 /**
208  * Typedef the L3 binding type
209  */
211 
212 /**
213  * Typedef the L2 binding type
214  */
216 
217 /**
218  * Definition of the static Singular DB for ACL bindings
219  */
220 template <typename LIST>
223 
224 template <typename LIST>
226 
227 namespace {
228 const static dependency_t __attribute__((unused)) l2o = l2_binding::order();
229 const static dependency_t __attribute__((unused)) l3o = l3_binding::order();
230 };
231 };
232 
233 std::ostream& operator<<(std::ostream& os,
234  const std::pair<direction_t, interface::key_t>& key);
235 };
236 
237 /*
238  * fd.io coding-style-patch-verification: ON
239  *
240  * Local Variables:
241  * eval: (c-set-style "mozilla")
242  * End:
243  */
244 
245 #endif
binding< l2_list > l2_binding
Typedef the L2 binding type.
std::shared_ptr< binding > singular() const
Return the &#39;singular instance&#39; of the L2 config that matches this object.
Definition: acl_binding.hpp:83
std::pair< direction_t, interface::key_t > key_t
The key for a binding is the direction and the interface.
Definition: acl_binding.hpp:45
void db_dump(const DB &db, std::ostream &os)
Print each of the objects in the DB into the stream provided.
const std::string key_t
In the opflex world each entity is known by a URI which can be converted into a string.
Definition: client_db.hpp:51
static void dump(std::ostream &os)
Dump all bindings into the stream provided.
static dependency_t order()
std::string to_string() const
convert to string format for debug purposes
Definition: hw.hpp:161
Feature Directions.
Definition: types.hpp:136
binding(const binding &o)
Copy Constructor.
Definition: acl_binding.hpp:62
A Database to store the unique &#39;singular&#39; instances of a single object type.
Definition: singular_db.hpp:33
A representation of an interface in VPP.
Definition: interface.hpp:41
Class definition for listeners to OM events.
Definition: om.hpp:284
inspect command handler Handler
Definition: inspect.hpp:54
void event_handler(void *tls_async)
Definition: tls_async.c:340
dependency_t
There needs to be a strict order in which object types are read from VPP (at boot time) and replayed ...
Definition: types.hpp:43
binding< l3_list > l3_binding
Typedef the L3 binding type.
~binding()
Destructor.
Definition: acl_binding.hpp:73
The interface to writing objects into VPP OM.
Definition: om.hpp:140
A base class for all object_base in the VPP object_base-Model.
Definition: object_base.hpp:29
std::ostream & operator<<(std::ostream &os, const std::pair< direction_t, interface::key_t > &key)
The VPP Object Model (VOM) library.
Definition: acl_binding.cpp:19
std::string to_string() const
convert to string format for debug purposes
Definition: acl_binding.hpp:88
typedef key
Definition: ipsec.api:245
void show(char *chroot_path, int verbose)
Definition: svmtool.c:105
const std::string & to_string() const
convert to string format for debug purposes
Definition: enum_base.hpp:36
A binding between an ACL and an interface.
Definition: acl_binding.hpp:39
binding(const direction_t &direction, const interface &itf, const LIST &acl)
Construct a new object matching the desried state.
Definition: acl_binding.hpp:50