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 (8190 + 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                 SEND_OK = 0,
  42                 SEND_NG,
  43                 SEND_END,
  44                 SEND_CONTINUE
  45         };
  46         struct edit_data {
  47                 std::string data;
  48                 size_t data_size;
  49                 size_t insert_posission;
  50                 size_t replace_size;
  51         } ;
  52
  53         struct send_status {
  54                 SEND_STATUS_TAG status;
  55                 size_t send_end_size;
  56                 size_t send_rest_size;
  57                 size_t send_possible_size;
  58                 size_t send_offset;
  59                 size_t unsend_size;
  60                 int edit_division;
  61                 boost::asio::ip::tcp::endpoint send_endpoint;
  62                 std::list<edit_data> edit_data_list;
  63         };
  64
  65         struct receive_data {
  66                 char *receive_buffer;
  67                 char *receive_buffer1;
  68                 char *receive_buffer2;
  69                 size_t receive_buffer_max_size;
  70                 size_t receive_buffer_rest_size;
  71                 std::list<send_status>  send_status_list;
  72                 receive_data() {
  73                         receive_buffer1 = NULL;
  74                         receive_buffer2 = NULL;
  75                         receive_buffer = NULL;
  76                         receive_buffer_max_size = 0;
  77                         receive_buffer_rest_size = 0;
  78                 }
  79                 ~receive_data() {
  80                         if (receive_buffer1 != NULL) {
  81                                 delete [] receive_buffer1;
  82                                 receive_buffer1 = NULL;
  83                         }
  84
  85                         if (receive_buffer2 != NULL) {
  86                                 delete [] receive_buffer2;
  87                                 receive_buffer2 = NULL;
  88                         }
  89
  90                         receive_buffer = NULL;
  91                         receive_buffer_max_size = 0;
  92                         receive_buffer_rest_size = 0;
  93                 }
  94         };
  95
  96
  97         struct session_thread_data_sessionless {
  98                 boost::thread::id thread_id;
  99                 int thread_division;
 100                 boost::thread::id pair_thread_id;
 101                 std::map<boost::asio::ip::tcp::endpoint, receive_data> receive_data_map;
 102                 int end_flag;
 103                 int accept_end_flag;
 104                 int sorry_flag;
 105                 int sorryserver_switch_flag;
 106                 int realserver_switch_flag;
 107                 boost::asio::ip::tcp::endpoint target_endpoint;
 108                 boost::asio::ip::tcp::endpoint client_endpoint_tcp;
 109                 EVENT_TAG last_status;
 110         };
 111
 112         typedef std::list<send_status>::iterator send_status_it;
 113         typedef boost::shared_ptr<session_thread_data_sessionless> thread_data_ptr;
 114         typedef std::map<boost::thread::id, thread_data_ptr>::iterator session_thread_data_map_it;
 115         typedef std::map<boost::asio::ip::tcp::endpoint, receive_data>::iterator receive_data_map_it;
 116 protected:
 117         int forwarded_for;
 118         boost:: array<char, MAX_OPTION_SIZE> sorry_uri ;
 119         std::map<boost::thread::id, thread_data_ptr> session_thread_data_map;
 120         boost::mutex    session_thread_data_map_mutex;
 121
 122 public:
 123         static const std::string MODULE_NAME;
 124
 125         static const int THREAD_DIVISION_UP_STREAM;
 126         static const int THREAD_DIVISION_DOWN_STREAM;
 127
 128         static const int END_FLAG_OFF;
 129         static const int END_FLAG_ON;
 130
 131         static const int ACCEPT_END_FLAG_OFF;
 132         static const int ACCEPT_END_FLAG_ON;
 133
 134         static const int SORRY_FLAG_ON;
 135         static const int SORRY_FLAG_OFF;
 136
 137         static const int SORRYSERVER_SWITCH_FLAG_OFF;
 138         static const int SORRYSERVER_SWITCH_FLAG_ON;
 139
 140         static const int REALSERVER_SWITCH_FLAG_OFF;
 141         static const int REALSERVER_SWITCH_FLAG_ON;
 142
 143         static const int EDIT_DIVISION_NO_EDIT;
 144         static const int EDIT_DIVISION_EDIT;
 145
 146         static const int FORWARDED_FOR_OFF;
 147         static const int FORWARDED_FOR_ON;
 148
 149 public:
 150         protocol_module_sessionless();
 151         ~protocol_module_sessionless();
 152
 153         bool is_tcp();
 154         bool is_udp();
 155         void replication_interrupt();
 156         void initialize(rs_list_itr_func_type    inlist_begin,
 157                         rs_list_itr_func_type    inlist_end,
 158                         rs_list_itr_next_func_type    inlist_next,
 159                         boost::function< void(void) >    inlist_lock,
 160                         boost::function< void(void) >    inlist_unlock);
 161         void finalize();
 162         bool is_use_sorry();
 163         check_message_result check_parameter(const std::vector<std::string>& args);
 164         check_message_result set_parameter(const std::vector<std::string>& args);
 165         check_message_result add_parameter(const std::vector<std::string>& args);
 166         void get_option_info(std::string &option);
 167         void handle_rslist_update();
 168         void register_schedule(tcp_schedule_func_type inschedule);
 169         void register_schedule(udp_schedule_func_type inschedule);
 170         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);
 171         EVENT_TAG handle_session_finalize(const boost::thread::id up_thread_id, const boost::thread::id down_thread_id);
 172         EVENT_TAG handle_accept(const boost::thread::id thread_id);
 173         EVENT_TAG handle_client_recv(const boost::thread::id thread_id, const boost::array<char, MAX_BUFFER_SIZE>& recvbuffer, const size_t recvlen);
 174         EVENT_TAG handle_realserver_select(const boost::thread::id thread_id, boost::asio::ip::tcp::endpoint &rs_endpoint);
 175         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);
 176         EVENT_TAG handle_realserver_connect(const boost::thread::id thread_id, boost::array<char, MAX_BUFFER_SIZE>& sendbuffer, size_t &datalen);
 177         EVENT_TAG handle_realserver_connection_fail(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint &rs_endpoint);
 178         EVENT_TAG handle_realserver_send(const boost::thread::id thread_id);
 179         EVENT_TAG handle_sorryserver_select(const boost::thread::id thread_id, boost::asio::ip::tcp::endpoint &sorry_endpoint);
 180         EVENT_TAG handle_sorryserver_connect(const boost::thread::id thread_id, boost::array<char, MAX_BUFFER_SIZE>& sendbuffer, size_t &datalen);
 181         EVENT_TAG handle_sorryserver_connection_fail(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint &sorry_endpoint);
 182         EVENT_TAG handle_sorryserver_send(const boost::thread::id thread_id);
 183         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);
 184         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);
 185         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);
 186         EVENT_TAG handle_response_send_inform(const boost::thread::id thread_id);
 187         EVENT_TAG handle_client_connection_check(const boost::thread::id thread_id, boost::array<char, MAX_BUFFER_SIZE>& sendbuffer, size_t &datalen);
 188         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);
 189         EVENT_TAG handle_client_send(const boost::thread::id thread_id);
 190         EVENT_TAG handle_client_disconnect(const boost::thread::id thread_id);
 191         EVENT_TAG handle_sorry_enable(const boost::thread::id thread_id);
 192         EVENT_TAG handle_sorry_disable(const boost::thread::id thread_id);
 193         EVENT_TAG handle_realserver_disconnect(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint &rs_endpoint);
 194         EVENT_TAG handle_sorryserver_disconnect(const boost::thread::id thread_id, const boost::asio::ip::tcp::endpoint &sorry_endpoint);
 195         EVENT_TAG handle_realserver_close(const boost::thread::id thread_id, const boost::asio::ip::udp::endpoint &rs_endpoint);
 196 };
 197
 198 inline bool operator < (const protocol_module_sessionless::edit_data &lref, const protocol_module_sessionless::edit_data &rref)
 199 {
 200         return lref.insert_posission < rref.insert_posission;
 201 }
 202
 203 class data_send_possible
 204 {
 205 public:
 206         inline bool operator()(const protocol_module_sessionless::send_status &send_status) {
 207                 return send_status.status == protocol_module_sessionless::SEND_OK
 208                        &&  send_status.send_possible_size > 0;
 209         }
 210 };
 211
 212 class data_send_disable
 213 {
 214 public:
 215         inline bool operator()(const protocol_module_sessionless::send_status &send_status) {
 216                 return send_status.status == protocol_module_sessionless::SEND_NG
 217                        || send_status.send_rest_size > 0 ;
 218         }
 219 };
 220
 221 class data_send_continue
 222 {
 223 public:
 224         inline bool operator()(const protocol_module_sessionless::send_status &send_status) {
 225                 return send_status.status == protocol_module_sessionless::SEND_CONTINUE;
 226         }
 227 };
 228
 229 class data_send_ng
 230 {
 231 public:
 232         inline bool operator()(const protocol_module_sessionless::send_status &send_status) {
 233                 return send_status.status == protocol_module_sessionless::SEND_NG;
 234         }
 235 };
 236
 237 class data_send_ok
 238 {
 239 public:
 240         inline bool operator()(const protocol_module_sessionless::send_status &send_status) {
 241                 return send_status.status == protocol_module_sessionless::SEND_OK;
 242         }
 243 };
 244
 245 class data_send_repeated
 246 {
 247 public:
 248         inline bool operator()(const protocol_module_sessionless::send_status &send_status_first,
 249                                const protocol_module_sessionless::send_status &send_status_second) {
 250                 return send_status_first.status == protocol_module_sessionless::SEND_NG
 251                        || send_status_first.status == protocol_module_sessionless::SEND_CONTINUE;
 252         }
 253 };
 254
 255 class data_send_list_incorrect
 256 {
 257 public:
 258         inline bool operator()(const protocol_module_sessionless::send_status &send_status_first,
 259                                const protocol_module_sessionless::send_status &send_status_second) {
 260                 return (send_status_first.status == protocol_module_sessionless::SEND_OK
 261                         && send_status_first.send_rest_size > 0)
 262                        || (send_status_first.status == protocol_module_sessionless::SEND_CONTINUE)
 263                        || (send_status_first.status == protocol_module_sessionless::SEND_NG);
 264         }
 265 };
 266
 267 class rs_list_scoped_lock
 268 {
 269 protected:
 270         boost::function< void(void) >    rs_list_unlock;
 271 public:
 272         rs_list_scoped_lock(boost::function< void(void) >    inlist_lock,
 273                             boost::function< void(void) >    inlist_unlock) {
 274                 inlist_lock();
 275                 rs_list_unlock = inlist_unlock;
 276         }
 277         ~rs_list_scoped_lock() {
 278                 rs_list_unlock();
 279         }
 280 };
 281 }
 282
 283 #endif  //PROTOCOL_MODULE_SESSIONLESS_H
 284