OpenSRF/src/libstack/osrf_stack.c

   1 #include "osrf_stack.h"
   2 #include "osrf_application.h"
   3
   4 osrf_message* _do_client( osrf_app_session*, osrf_message* );
   5 osrf_message* _do_server( osrf_app_session*, osrf_message* );
   6
   7 /* tell osrf_app_session where the stack entry is */
   8 int (*osrf_stack_entry_point) (transport_client*, int)  = &osrf_stack_process;
   9
  10 int osrf_stack_process( transport_client* client, int timeout ) {
  11         if( !client ) return -1;
  12         transport_message* msg = NULL;
  13
  14         while( (msg = client_recv( client, timeout )) ) {
  15                 debug_handler( "Received message from transport code from %s", msg->sender );
  16                 osrf_stack_transport_handler( msg, NULL );
  17                 timeout = 0;
  18         }
  19
  20         return 0;
  21 }
  22
  23
  24
  25 // -----------------------------------------------------------------------------
  26 // Entry point into the stack
  27 // -----------------------------------------------------------------------------
  28 osrfAppSession* osrf_stack_transport_handler( transport_message* msg, char* my_service ) {
  29
  30         if(!msg) return NULL;
  31
  32         debug_handler( "Transport handler received new message \nfrom %s "
  33                         "to %s with body \n\n%s\n", msg->sender, msg->recipient, msg->body );
  34
  35         if(! msg->thread  && ! msg->is_error ) {
  36                 warning_handler("Received a non-error message with no thread trace... dropping");
  37                 message_free( msg );
  38         }
  39
  40         osrf_app_session* session = osrf_app_session_find_session( msg->thread );
  41
  42         if( !session )
  43                 session = osrf_app_server_session_init( msg->thread, my_service, msg->sender);
  44
  45         if( !session ) return NULL;
  46
  47         if(!msg->is_error)
  48                 debug_handler("Session [%s] found or built", session->session_id );
  49
  50         osrf_app_session_set_remote( session, msg->sender );
  51         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  52         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  53         int num_msgs = osrf_message_deserialize(msg->body, arr, OSRF_MAX_MSGS_PER_PACKET);
  54
  55         debug_handler( "We received %d messages from %s", num_msgs, msg->sender );
  56
  57         int i;
  58         for( i = 0; i != num_msgs; i++ ) {
  59
  60                 /* if we've received a jabber layer error message (probably talking to
  61                         someone who no longer exists) and we're not talking to the original
  62                         remote id for this server, consider it a redirect and pass it up */
  63                 if(msg->is_error) {
  64                         warning_handler( " !!! Received Jabber layer error message" );
  65
  66                         if(strcmp(session->remote_id,session->orig_remote_id)) {
  67                                 warning_handler( "Treating jabber error as redirect for tt [%d] "
  68                                         "and session [%s]", arr[i]->thread_trace, session->session_id );
  69
  70                                 arr[i]->m_type = STATUS;
  71                                 arr[i]->status_code = OSRF_STATUS_REDIRECTED;
  72
  73                         } else {
  74                                 warning_handler(" * Jabber Error is for top level remote id [%s], no one "
  75                                                 "to send my message too!!!", session->remote_id );
  76                         }
  77                 }
  78
  79                 osrf_stack_message_handler( session, arr[i] );
  80         }
  81
  82         message_free( msg );
  83         debug_handler("after msg delete");
  84
  85         return session;
  86 }
  87
  88 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  89         if(session == NULL || msg == NULL)
  90                 return 0;
  91
  92         osrf_message* ret_msg = NULL;
  93
  94         if( session->type ==  OSRF_SESSION_CLIENT )
  95                  ret_msg = _do_client( session, msg );
  96         else
  97                 ret_msg= _do_server( session, msg );
  98
  99         if(ret_msg) {
 100                 debug_handler("passing message %d / session %s to app handler",
 101                                 msg->thread_trace, session->session_id );
 102                 osrf_stack_application_handler( session, ret_msg );
 103         } else
 104                 osrf_message_free(msg);
 105
 106         return 1;
 107
 108 }
 109
 110 /** If we return a message, that message should be passed up the stack,
 111   * if we return NULL, we're finished for now...
 112   */
 113 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
 114         if(session == NULL || msg == NULL)
 115                 return NULL;
 116
 117         osrf_message* new_msg;
 118
 119         if( msg->m_type == STATUS ) {
 120
 121                 switch( msg->status_code ) {
 122
 123                         case OSRF_STATUS_OK:
 124                                 debug_handler("We connected successfully");
 125                                 session->state = OSRF_SESSION_CONNECTED;
 126                                 debug_handler( "State: %x => %s => %d", session, session->session_id, session->state );
 127                                 return NULL;
 128
 129                         case OSRF_STATUS_COMPLETE:
 130                                 osrf_app_session_set_complete( session, msg->thread_trace );
 131                                 return NULL;
 132
 133                         case OSRF_STATUS_CONTINUE:
 134                                 osrf_app_session_request_reset_timeout( session, msg->thread_trace );
 135                                 return NULL;
 136
 137                         case OSRF_STATUS_REDIRECTED:
 138                                 osrf_app_session_reset_remote( session );
 139                                 session->state = OSRF_SESSION_DISCONNECTED;
 140                                 osrf_app_session_request_resend( session, msg->thread_trace );
 141                                 return NULL;
 142
 143                         case OSRF_STATUS_EXPFAILED:
 144                                 osrf_app_session_reset_remote( session );
 145                                 session->state = OSRF_SESSION_DISCONNECTED;
 146                                 /* set the session to 'stateful' then resend */
 147                         //      osrf_app_session_request_resend( session, msg->thread_trace );
 148                                 return NULL;
 149
 150                         case OSRF_STATUS_TIMEOUT:
 151                                 osrf_app_session_reset_remote( session );
 152                                 session->state = OSRF_SESSION_DISCONNECTED;
 153                                 osrf_app_session_request_resend( session, msg->thread_trace );
 154                                 return NULL;
 155
 156
 157                         default:
 158                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 159                                 osrf_message_set_status_info( new_msg,
 160                                                 msg->status_name, msg->status_text, msg->status_code );
 161                                 warning_handler("The stack doesn't know what to do with "
 162                                                 "the provided message code: %d, name %s. Passing UP.",
 163                                                 msg->status_code, msg->status_name );
 164                                 new_msg->is_exception = 1;
 165                                 osrf_app_session_set_complete( session, msg->thread_trace );
 166                                 osrf_message_free(msg);
 167                                 return new_msg;
 168                 }
 169
 170                 return NULL;
 171
 172         } else if( msg->m_type == RESULT )
 173                 return msg;
 174
 175         return NULL;
 176
 177 }
 178
 179
 180 /** If we return a message, that message should be passed up the stack,
 181   * if we return NULL, we're finished for now...
 182   */
 183 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 184
 185         if(session == NULL || msg == NULL) return NULL;
 186
 187         debug_handler("Server received message of type %d", msg->m_type );
 188
 189         switch( msg->m_type ) {
 190
 191                 case STATUS:
 192                                 return NULL;
 193
 194                 case DISCONNECT:
 195                                 osrf_app_session_destroy(session);
 196                                 return NULL;
 197
 198                 case CONNECT:
 199                                 osrfAppSessionStatus( session,
 200                                                 OSRF_STATUS_OK, msg->thread_trace, "Connection Successful" );
 201                                 return NULL;
 202
 203                 case REQUEST:
 204
 205                                 debug_handler("server passing message %d to application handler "
 206                                                 "for session %s", msg->thread_trace, session->session_id );
 207                                 return msg;
 208
 209                 default:
 210                         warning_handler("Server cannot handle message of type %d", msg->m_type );
 211                         return NULL;
 212
 213         }
 214 }
 215
 216
 217
 218
 219 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 220
 221         if(session == NULL || msg == NULL) return 0;
 222
 223         if(msg->m_type == RESULT && session->type == OSRF_SESSION_CLIENT) {
 224                 osrf_app_session_push_queue( session, msg );
 225                 return 1;
 226         }
 227
 228         if(msg->m_type != REQUEST) return 1;
 229
 230         char* method = msg->method_name;
 231         char* app       = session->remote_service;
 232         jsonObject* params = msg->_params;
 233
 234         osrfAppRunMethod( app, method,  session, msg->thread_trace, params );
 235
 236         return 1;
 237
 238 }
 239