FD.io VPP  v18.04-17-g3a0d853
Vector Packet Processing
nat_static.cpp
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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 #include "vom/nat_static.hpp"
17 #include "vom/nat_static_cmds.hpp"
19 
20 namespace VOM {
21 singular_db<nat_static::key_t, nat_static> nat_static::m_db;
22 nat_static::event_handler nat_static::m_evh;
23 
24 nat_static::nat_static(const boost::asio::ip::address& inside,
25  const boost::asio::ip::address_v4& outside)
26  : m_hw(false)
27  , m_rd(route_domain::get_default())
28  , m_inside(inside)
29  , m_outside(outside)
30 {
31 }
32 
34  const boost::asio::ip::address& inside,
35  const boost::asio::ip::address_v4& outside)
36  : m_hw(false)
37  , m_rd(rd.singular())
38  , m_inside(inside)
39  , m_outside(outside)
40 {
41 }
42 
44  : m_hw(ns.m_hw)
45  , m_rd(ns.m_rd)
46  , m_inside(ns.m_inside)
47  , m_outside(ns.m_outside)
48 {
49 }
50 
52 {
53  sweep();
54 
55  // not in the DB anymore.
56  m_db.release(key(), this);
57 }
58 
61 {
62  return (std::make_pair(m_rd->key(), m_outside));
63 }
64 
65 bool
67 {
68  return ((key() == n.key()) && (m_inside == n.m_inside));
69 }
70 
71 void
72 nat_static::sweep()
73 {
74  if (m_hw) {
75  if (m_inside.is_v4()) {
77  m_hw, m_rd->table_id(), m_inside.to_v4(), m_outside));
78  }
79  }
80  HW::write();
81 }
82 
83 void
85 {
86  if (m_hw) {
87  if (m_inside.is_v4()) {
89  m_hw, m_rd->table_id(), m_inside.to_v4(), m_outside));
90  }
91  }
92 }
93 
94 void
95 nat_static::update(const nat_static& r)
96 {
97  /*
98  * create the table if it is not yet created
99  */
100  if (rc_t::OK != m_hw.rc()) {
101  if (m_inside.is_v4()) {
103  m_hw, m_rd->table_id(), m_inside.to_v4(), m_outside));
104  }
105  }
106 }
107 
108 std::string
110 {
111  std::ostringstream s;
112  s << "nat-static:["
113  << "table:" << m_rd->to_string() << " inside:" << m_inside.to_string()
114  << " outside:" << m_outside.to_string() << "]";
115 
116  return (s.str());
117 }
118 
119 std::shared_ptr<nat_static>
120 nat_static::find_or_add(const nat_static& temp)
121 {
122  return (m_db.find_or_add(temp.key(), temp));
123 }
124 
125 std::shared_ptr<nat_static>
127 {
128  return (m_db.find(key));
129 }
130 
131 std::shared_ptr<nat_static>
133 {
134  return find_or_add(*this);
135 }
136 
137 void
138 nat_static::dump(std::ostream& os)
139 {
140  db_dump(m_db, os);
141 }
142 
143 nat_static::event_handler::event_handler()
144 {
145  OM::register_listener(this);
146  inspect::register_handler({ "nat-static" }, "NAT Statics", this);
147 }
148 
149 void
150 nat_static::event_handler::handle_replay()
151 {
152  m_db.replay();
153 }
154 
155 void
156 nat_static::event_handler::handle_populate(const client_db::key_t& key)
157 {
158  /*
159  * dump VPP current states
160  */
161  std::shared_ptr<nat_static_cmds::dump_44_cmd> cmd =
162  std::make_shared<nat_static_cmds::dump_44_cmd>();
163 
164  HW::enqueue(cmd);
165  HW::write();
166 
167  for (auto& record : *cmd) {
168 
169  auto& payload = record.get_payload();
170 
171  boost::asio::ip::address inside = from_bytes(0, payload.local_ip_address);
172  boost::asio::ip::address outside =
173  from_bytes(0, payload.external_ip_address);
174  nat_static n(route_domain(payload.vrf_id), inside, outside.to_v4());
175 
176  /*
177  * Write each of the discovered mappings into the OM,
178  * but disable the HW Command q whilst we do, so that no
179  * commands are sent to VPP
180  */
181  OM::commit(key, n);
182  }
183 }
184 
186 nat_static::event_handler::order() const
187 {
188  return (dependency_t::ENTRY);
189 }
190 
191 void
192 nat_static::event_handler::show(std::ostream& os)
193 {
194  db_dump(m_db, os);
195 }
196 }
197 
198 /*
199  * fd.io coding-style-patch-verification: ON
200  *
201  * Local Variables:
202  * eval: (c-set-style "mozilla")
203  * End:
204  */
A cmd class that deletes a NAT 44 static mapping.
void replay(void)
replay the object to create it in hardware
Definition: nat_static.cpp:84
std::shared_ptr< nat_static > singular() const
Return the matching &#39;singular instance&#39;.
Definition: nat_static.cpp:132
void db_dump(const DB &db, std::ostream &os)
Print each of the objects in the DB into the stream provided.
A command class that creates NAT 44 static mapping.
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 register_handler(const std::vector< std::string > &cmds, const std::string &help, command_handler *ch)
Register a command handler for inspection.
Definition: inspect.cpp:85
std::string to_string() const
Convert to string for debugging.
Definition: nat_static.cpp:109
static rc_t write()
Write/Execute all commands hitherto enqueued.
Definition: hw.cpp:236
A route-domain is a VRF.
static void dump(std::ostream &os)
Dump all bridge_domain-doamin into the stream provided.
Definition: nat_static.cpp:138
rc_t rc() const
Get the HW return code.
Definition: hw.hpp:118
A entry in the ARP termination table of a Bridge Domain.
Definition: nat_static.hpp:27
nat_static(const boost::asio::ip::address &inside, const boost::asio::ip::address_v4 &outside)
Construct an NAT Static binding with the outside address in default table.
Definition: nat_static.cpp:24
std::pair< route::table_id_t, boost::asio::ip::address > key_t
The key for a NAT static mapping.
Definition: nat_static.hpp:35
boost::asio::ip::address from_bytes(uint8_t is_ip6, uint8_t *bytes)
Convert a VPP byte stinrg into a boost addresss.
Definition: prefix.cpp:193
static rc_t commit(const client_db::key_t &key, const OBJ &obj)
Make the State in VPP reflect the expressed desired state.
Definition: om.hpp:202
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
static const rc_t OK
The HW write was successfull.
Definition: types.hpp:112
static void enqueue(cmd *f)
Enqueue A command for execution.
Definition: hw.cpp:194
The VPP Object Model (VOM) library.
Definition: acl_binding.cpp:19
A representation of a method call to VPP.
Definition: cmd.hpp:32
static std::shared_ptr< nat_static > find(const key_t &key)
Find the instnace of the bridge_domain domain in the OM.
Definition: nat_static.cpp:126
void show(char *chroot_path, int verbose)
Definition: svmtool.c:105
bool operator==(const nat_static &n) const
Comparison operator - for UT.
Definition: nat_static.cpp:66
Entries in Tables.
~nat_static()
Destructor.
Definition: nat_static.cpp:51
const key_t key() const
Return the object&#39;s key.
Definition: nat_static.cpp:60
static bool register_listener(listener *listener)
Register a listener of events.
Definition: om.cpp:127