l7vsd/module/protocol/protocol_module_sessionless.h

   1 /*
   2  * @file  protocol_module_sessionless.h
   3  * @brief protocol module sessionless header file.
   4  *
   5  * L7VSD: Linux Virtual Server for Layer7 Load Balancing
   6  * Copyright (C) 2009  NTT COMWARE Corporation.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  **********************************************************************/
  24
  25 #include <boost/thread/mutex.hpp>
  26 #include "http_protocol_module_base.h"
  27
  28 #ifndef PROTOCOL_MODULE_SESSIONLESS_H
  29 #define PROTOCOL_MODULE_SESSIONLESS_H
  30
  31 #define MAX_OPTION_SIZE 128
  32 #define MAX_SESSIONLESS_MODULE_BUFFER_SIZE (4 * 1024* 1024 + MAX_BUFFER_SIZE)
  33
  34 namespace l7vs
  35 {
  36
  37 class protocol_module_sessionless : public http_protocol_module_base
  38 {
  39 public:
  40         enum SEND_STATUS_TAG
  41     {
  42                 SEND_OK= 0,
  43                 SEND_NG,
  44                 SEND_END,
  45                 SEND_CONTINUE
  46     };
  47         struct edit_data {
  48         std::string data;
  49         size_t data_size;
  50         size_t insert_posission;
  51         size_t replace_size;
  52     } ;
  53
  54     struct send_status {
  55         SEND_STATUS_TAG status;
  56         size_t send_end_size;
  57         size_t send_rest_size;
  58         size_t send_possible_size;
  59         size_t send_offset;
  60         size_t unsend_size;
  61         int edit_division;
  62         boost::asio::ip::tcp::endpoint send_endpoint;
  63         std::list<edit_data> edit_data_list;
  64     };
  65
  66     struct recive_data {
  67         char* recive_buffer;
  68         char* recive_buffer1;
  69         char* recive_buffer2;
  70         size_t recive_buffer_max_size;
  71         size_t recive_buffer_rest_size;
  72         std::list<send_status>  send_status_list;
  73         recive_data()
  74         {
  75             recive_buffer1 = NULL;
  76             recive_buffer2 = NULL;
  77             recive_buffer = NULL;
  78             recive_buffer_max_size = 0;
  79             recive_buffer_rest_size = 0;
  80         }
  81         ~recive_data()
  82         {
  83             if (recive_buffer1 != NULL)
  84             {
  85                 delete [] recive_buffer1;
  86                 recive_buffer1 = NULL;
  87             }
  88
  89             if (recive_buffer2 != NULL)
  90             {
  91                 delete [] recive_buffer2;
  92                 recive_buffer2 = NULL;
  93             }
  94
  95             recive_buffer = NULL;
  96             recive_buffer_max_size = 0;
  97             recive_buffer_rest_size = 0;
  98         }
  99         };
 100
 101
 102     struct session_thread_data_sessionless {
 103         boost::thread::id thread_id;
 104         int thread_division;
 105         boost::thread::id pair_thread_id;
 106         std::map<boost::asio::ip::tcp::endpoint, recive_data> recive_data_map;
 107         int end_flag;
 108         int accept_end_flag;
 109         int sorry_flag;
 110         int sorryserver_switch_flag;
 111         int realserver_switch_flag;
 112         boost::asio::ip::tcp::endpoint target_endpoint;
 113         boost::asio::ip::tcp::endpoint client_endpoint_tcp;
 114         EVENT_TAG last_status;
 115     };
 116
 117    typedef std::list<send_status>::iterator send_status_it;
 118    typedef boost::shared_ptr<session_thread_data_sessionless> thread_data_ptr;
 119    typedef std::map<boost::thread::id, thread_data_ptr>::iterator session_thread_data_map_it;
 120    typedef std::map<boost::asio::ip::tcp::endpoint, recive_data>::iterator recive_data_map_it;
 121 protected:
 122         int forwarded_for;
 123         boost:: array<char,MAX_OPTION_SIZE> sorry_uri ;
 124         std::map<boost::thread::id, thread_data_ptr> session_thread_data_map;
 125         boost::mutex    session_thread_data_map_mutex;
 126
 127 public:
 128         static const std::string MODULE_NAME;
 129
 130         static const int THREAD_DIVISION_UP_STREAM;
 131         static const int THREAD_DIVISION_DOWN_STREAM;
 132
 133         static const int END_FLAG_OFF;
 134         static const int END_FLAG_ON;
 135
 136         static const int ACCEPT_END_FLAG_OFF;
 137         static const int ACCEPT_END_FLAG_ON;
 138
 139         static const int SORRY_FLAG_ON;
 140         static const int SORRY_FLAG_OFF;
 141
 142         static const int SORRYSERVER_SWITCH_FLAG_OFF;
 143         static const int SORRYSERVER_SWITCH_FLAG_ON;
 144
 145         static const int REALSERVER_SWITCH_FLAG_OFF;
 146         static const int REALSERVER_SWITCH_FLAG_ON;
 147
 148         static const int EDIT_DIVISION_NO_EDIT;
 149         static const int EDIT_DIVISION_EDIT;
 150
 151         static const int FORWARDED_FOR_OFF;
 152         static const int FORWARDED_FOR_ON;
 153
 154 public:
 155         protocol_module_sessionless();
 156         ~protocol_module_sessionless();
 157
 158         bool is_tcp();
 159         bool is_udp();
 160         void replication_interrupt();
 161         void initialize(rs_list_itr_func_type   inlist_begin,
 162                         rs_list_itr_func_type   inlist_end,
 163                         rs_list_itr_next_func_type      inlist_next,
 164                         boost::function< void( void ) > inlist_lock,
 165                         boost::function< void( void ) > inlist_unlock);
 166         void finalize();
 167         bool is_use_sorry();
 168         check_message_result check_parameter(const std::vector<std::string>& args);
 169         check_message_result set_parameter(const std::vector<std::string>& args);
 170         check_message_result add_parameter(const std::vector<std::string>& args);
 171         void handle_rslist_update();
 172         void register_schedule(tcp_schedule_func_type inschedule);
 173         void register_schedule(udp_schedule_func_type inschedule);
 174         EVENT_TAG handle_session_initialize(const boost::thread::id up_thread_id, const boost::thread::id down_thread_id, const boost::asio::ip::tcp::endpoint& client_endpoint_tcp, const boost::asio::ip::udp::endpoint& client_endpoint_udp);
 175         EVENT_TAG handle_session_finalize(const boost::thread::id up_thread_id, const boost::thread::id down_thread_id);
 176         EVENT_TAG handle_accept(const boost::thread::id thread_id);
 177         EVENT_TAG handle_client_recv(const boost::thread::id thread_id, const boost::array<char,MAX_BUFFER_SIZE>& recvbuffer, const size_t recvlen);
 178         EVENT_TAG handle_realserver_select(const boost::thread::id thread_id, boost::asio::ip::tcp::endpoint& rs_endpoint);
 179         EVENT_TAG handle_realserver_select(const boost::thread::id thread_id, boost::asio::ip::udp::endpoint& rs_endpoint, boost::array<char,MAX_BUFFER_SIZE>& sendbuffer, size_t& datalen);
 180         EVENT_TAG handle_realserver_connect(const boost::thread::id thread_id, boost::array<char,MAX_BUFFER_SIZE>& sendbuffer, size_t& datalen);
 181         EVENT_TAG handle_realserver_connection_fail(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint& rs_endpoint);
 182         EVENT_TAG handle_realserver_send(const boost::thread::id thread_id);
 183         EVENT_TAG handle_sorryserver_select(const boost::thread::id thread_id, boost::asio::ip::tcp::endpoint& sorry_endpoint);
 184         EVENT_TAG handle_sorryserver_connect(const boost::thread::id thread_id, boost::array<char,MAX_BUFFER_SIZE>& sendbuffer, size_t& datalen);
 185         EVENT_TAG handle_sorryserver_connection_fail(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint& sorry_endpoint);
 186         EVENT_TAG handle_sorryserver_send(const boost::thread::id thread_id);
 187         EVENT_TAG handle_realserver_recv(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint& rs_endpoint, const boost::array<char,MAX_BUFFER_SIZE>& recvbuffer, const size_t recvlen);
 188         EVENT_TAG handle_realserver_recv(const boost::thread::id thread_id, const boost::asio::ip::udp::endpoint& rs_endpoint, const boost::array<char,MAX_BUFFER_SIZE>& recvbuffer, const size_t recvlen);
 189         EVENT_TAG handle_sorryserver_recv(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint& sorry_endpoint, const boost::array<char, MAX_BUFFER_SIZE>& recvbuffer, const size_t recvlen);
 190         EVENT_TAG handle_response_send_inform(const boost::thread::id thread_id);
 191         EVENT_TAG handle_client_connection_check(const boost::thread::id thread_id, boost::array<char,MAX_BUFFER_SIZE>& sendbuffer, size_t& datalen);
 192         EVENT_TAG handle_client_select(const boost::thread::id thread_id, boost::asio::ip::udp::endpoint& cl_endpoint, boost::array<char,MAX_BUFFER_SIZE>& sendbuffer, size_t& datalen);
 193         EVENT_TAG handle_client_send(const boost::thread::id thread_id);
 194         EVENT_TAG handle_client_disconnect(const boost::thread::id thread_id);
 195         EVENT_TAG handle_sorry_enable(const boost::thread::id thread_id);
 196         EVENT_TAG handle_sorry_disable(const boost::thread::id thread_id);
 197         EVENT_TAG handle_realserver_disconnect(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint& rs_endpoint);
 198         EVENT_TAG handle_sorryserver_disconnect(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint& sorry_endpoint);
 199         EVENT_TAG handle_realserver_close(const boost::thread::id thread_id, const boost::asio::ip::udp::endpoint& rs_endpoint);
 200 };
 201
 202 inline bool operator < (const protocol_module_sessionless::edit_data& lref, const protocol_module_sessionless::edit_data& rref)
 203 {
 204         return lref.insert_posission < rref.insert_posission;
 205 }
 206
 207 class data_send_possible
 208 {
 209 public:
 210         inline bool operator () (const protocol_module_sessionless::send_status& send_status)
 211         {
 212                 return send_status.status == protocol_module_sessionless::SEND_OK
 213                                 &&  send_status.send_possible_size > 0;
 214         }
 215 };
 216
 217 class data_send_disable
 218 {
 219 public:
 220         inline bool operator () (const protocol_module_sessionless::send_status& send_status)
 221         {
 222                 return send_status.status == protocol_module_sessionless::SEND_NG
 223                 || send_status.send_rest_size > 0 ;
 224         }
 225 };
 226
 227 class data_send_continue
 228 {
 229 public:
 230         inline bool operator () (const protocol_module_sessionless::send_status& send_status)
 231         {
 232                 return send_status.status == protocol_module_sessionless::SEND_CONTINUE;
 233         }
 234 };
 235
 236 class data_send_ng
 237 {
 238 public:
 239         inline bool operator ()(const protocol_module_sessionless::send_status& send_status)
 240         {
 241                 return send_status.status == protocol_module_sessionless::SEND_NG;
 242         }
 243 };
 244
 245 class data_send_ok
 246 {
 247 public:
 248         inline bool operator ()(const protocol_module_sessionless::send_status& send_status)
 249         {
 250                 return send_status.status == protocol_module_sessionless::SEND_OK;
 251         }
 252 };
 253
 254 class data_send_repeated
 255 {
 256 public:
 257         inline bool operator ()(const protocol_module_sessionless::send_status& send_status_first,
 258                 const protocol_module_sessionless::send_status& send_status_second)
 259         {
 260                 return send_status_first.status == protocol_module_sessionless::SEND_NG
 261                 || send_status_first.status == protocol_module_sessionless::SEND_CONTINUE;
 262         }
 263 };
 264
 265 class data_send_list_incorrect
 266 {
 267 public:
 268         inline bool operator ()(const protocol_module_sessionless::send_status& send_status_first,
 269                 const protocol_module_sessionless::send_status& send_status_second)
 270         {
 271                 return (send_status_first.status == protocol_module_sessionless::SEND_OK
 272                 && send_status_first.send_rest_size > 0)
 273                 || (send_status_first.status == protocol_module_sessionless::SEND_CONTINUE)
 274                 || (send_status_first.status == protocol_module_sessionless::SEND_NG);
 275         }
 276 };
 277
 278 }
 279
 280 #endif  //PROTOCOL_MODULE_SESSIONLESS_H
 281