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, int*)  = &osrf_stack_process;
   9
  10 int osrf_stack_process( transport_client* client, int timeout, int* msg_received ) {
  11         if( !client ) return -1;
  12         transport_message* msg = NULL;
  13         if(msg_received) *msg_received = 0;
  14
  15         while( (msg = client_recv( client, timeout )) ) {
  16                 if(msg_received) *msg_received = 1;
  17                 osrfLogDebug( OSRF_LOG_MARK,  "Received message from transport code from %s", msg->sender );
  18                 osrf_stack_transport_handler( msg, NULL );
  19                 timeout = 0;
  20         }
  21
  22         if( client->error ) {
  23                 osrfLogWarning(OSRF_LOG_MARK, "transport_client had trouble reading from the socket..");
  24                 return -1;
  25         }
  26
  27         if( ! client_connected( client ) ) return -1;
  28
  29         return 0;
  30 }
  31
  32
  33
  34 // -----------------------------------------------------------------------------
  35 // Entry point into the stack
  36 // -----------------------------------------------------------------------------
  37 osrfAppSession* osrf_stack_transport_handler( transport_message* msg, char* my_service ) {
  38
  39         if(!msg) return NULL;
  40
  41         osrfLogDebug( OSRF_LOG_MARK,  "Transport handler received new message \nfrom %s "
  42                         "to %s with body \n\n%s\n", msg->sender, msg->recipient, msg->body );
  43
  44         if( msg->is_error && ! msg->thread ) {
  45                 osrfLogWarning( OSRF_LOG_MARK, "!! Received jabber layer error for %s ... exiting\n", msg->sender );
  46                 message_free( msg );
  47                 return NULL;
  48         }
  49
  50         if(! msg->thread  && ! msg->is_error ) {
  51                 osrfLogWarning( OSRF_LOG_MARK, "Received a non-error message with no thread trace... dropping");
  52                 message_free( msg );
  53                 return NULL;
  54         }
  55
  56         osrf_app_session* session = osrf_app_session_find_session( msg->thread );
  57
  58         if( !session && my_service )
  59                 session = osrf_app_server_session_init( msg->thread, my_service, msg->sender);
  60
  61         if( !session ) return NULL;
  62
  63         if(!msg->is_error)
  64                 osrfLogDebug( OSRF_LOG_MARK, "Session [%s] found or built", session->session_id );
  65
  66         osrf_app_session_set_remote( session, msg->sender );
  67         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  68         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  69         int num_msgs = osrf_message_deserialize(msg->body, arr, OSRF_MAX_MSGS_PER_PACKET);
  70
  71         osrfLogDebug( OSRF_LOG_MARK,  "We received %d messages from %s", num_msgs, msg->sender );
  72
  73         double starttime = get_timestamp_millis();
  74
  75         int i;
  76         for( i = 0; i != num_msgs; i++ ) {
  77
  78                 /* if we've received a jabber layer error message (probably talking to
  79                         someone who no longer exists) and we're not talking to the original
  80                         remote id for this server, consider it a redirect and pass it up */
  81                 if(msg->is_error) {
  82                         osrfLogWarning( OSRF_LOG_MARK,  " !!! Received Jabber layer error message" );
  83
  84                         if(strcmp(session->remote_id,session->orig_remote_id)) {
  85                                 osrfLogWarning( OSRF_LOG_MARK,  "Treating jabber error as redirect for tt [%d] "
  86                                         "and session [%s]", arr[i]->thread_trace, session->session_id );
  87
  88                                 arr[i]->m_type = STATUS;
  89                                 arr[i]->status_code = OSRF_STATUS_REDIRECTED;
  90
  91                         } else {
  92                                 osrfLogWarning( OSRF_LOG_MARK, " * Jabber Error is for top level remote id [%s], no one "
  93                                                 "to send my message too!!!", session->remote_id );
  94                         }
  95                 }
  96
  97                 osrf_stack_message_handler( session, arr[i] );
  98         }
  99
 100         double duration = get_timestamp_millis() - starttime;
 101         osrfLogInfo(OSRF_LOG_MARK, "Message processing duration %lf", duration);
 102
 103         message_free( msg );
 104         osrfLogDebug( OSRF_LOG_MARK, "after msg delete");
 105
 106         return session;
 107 }
 108
 109 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
 110         if(session == NULL || msg == NULL)
 111                 return 0;
 112
 113         osrf_message* ret_msg = NULL;
 114
 115         if( session->type ==  OSRF_SESSION_CLIENT )
 116                  ret_msg = _do_client( session, msg );
 117         else
 118                 ret_msg= _do_server( session, msg );
 119
 120         if(ret_msg) {
 121                 osrfLogDebug( OSRF_LOG_MARK, "passing message %d / session %s to app handler",
 122                                 msg->thread_trace, session->session_id );
 123                 osrf_stack_application_handler( session, ret_msg );
 124         } else
 125                 osrf_message_free(msg);
 126
 127         return 1;
 128
 129 }
 130
 131 /** If we return a message, that message should be passed up the stack,
 132   * if we return NULL, we're finished for now...
 133   */
 134 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
 135         if(session == NULL || msg == NULL)
 136                 return NULL;
 137
 138         osrf_message* new_msg;
 139
 140         if( msg->m_type == STATUS ) {
 141
 142                 switch( msg->status_code ) {
 143
 144                         case OSRF_STATUS_OK:
 145                                 osrfLogDebug( OSRF_LOG_MARK, "We connected successfully");
 146                                 session->state = OSRF_SESSION_CONNECTED;
 147                                 osrfLogDebug( OSRF_LOG_MARK,  "State: %x => %s => %d", session, session->session_id, session->state );
 148                                 return NULL;
 149
 150                         case OSRF_STATUS_COMPLETE:
 151                                 osrf_app_session_set_complete( session, msg->thread_trace );
 152                                 return NULL;
 153
 154                         case OSRF_STATUS_CONTINUE:
 155                                 osrf_app_session_request_reset_timeout( session, msg->thread_trace );
 156                                 return NULL;
 157
 158                         case OSRF_STATUS_REDIRECTED:
 159                                 osrf_app_session_reset_remote( session );
 160                                 session->state = OSRF_SESSION_DISCONNECTED;
 161                                 osrf_app_session_request_resend( session, msg->thread_trace );
 162                                 return NULL;
 163
 164                         case OSRF_STATUS_EXPFAILED:
 165                                 osrf_app_session_reset_remote( session );
 166                                 session->state = OSRF_SESSION_DISCONNECTED;
 167                                 return NULL;
 168
 169                         case OSRF_STATUS_TIMEOUT:
 170                                 osrf_app_session_reset_remote( session );
 171                                 session->state = OSRF_SESSION_DISCONNECTED;
 172                                 osrf_app_session_request_resend( session, msg->thread_trace );
 173                                 return NULL;
 174
 175
 176                         default:
 177                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 178                                 osrf_message_set_status_info( new_msg,
 179                                                 msg->status_name, msg->status_text, msg->status_code );
 180                                 osrfLogWarning( OSRF_LOG_MARK, "The stack doesn't know what to do with "
 181                                                 "the provided message code: %d, name %s. Passing UP.",
 182                                                 msg->status_code, msg->status_name );
 183                                 new_msg->is_exception = 1;
 184                                 osrf_app_session_set_complete( session, msg->thread_trace );
 185                                 osrf_message_free(msg);
 186                                 return new_msg;
 187                 }
 188
 189                 return NULL;
 190
 191         } else if( msg->m_type == RESULT )
 192                 return msg;
 193
 194         return NULL;
 195
 196 }
 197
 198
 199 /** If we return a message, that message should be passed up the stack,
 200   * if we return NULL, we're finished for now...
 201   */
 202 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 203
 204         if(session == NULL || msg == NULL) return NULL;
 205
 206         osrfLogDebug( OSRF_LOG_MARK, "Server received message of type %d", msg->m_type );
 207
 208         switch( msg->m_type ) {
 209
 210                 case STATUS:
 211                                 return NULL;
 212
 213                 case DISCONNECT:
 214                                 /* session will be freed by the forker */
 215                                 osrfLogDebug(OSRF_LOG_MARK, "Client sent explicit disconnect");
 216                                 session->state = OSRF_SESSION_DISCONNECTED;
 217                                 return NULL;
 218
 219                 case CONNECT:
 220                                 osrfAppSessionStatus( session, OSRF_STATUS_OK,
 221                                                 "osrfConnectStatus", msg->thread_trace, "Connection Successful" );
 222                                 session->state = OSRF_SESSION_CONNECTED;
 223                                 return NULL;
 224
 225                 case REQUEST:
 226
 227                                 osrfLogDebug( OSRF_LOG_MARK, "server passing message %d to application handler "
 228                                                 "for session %s", msg->thread_trace, session->session_id );
 229                                 return msg;
 230
 231                 default:
 232                         osrfLogWarning( OSRF_LOG_MARK, "Server cannot handle message of type %d", msg->m_type );
 233                         session->state = OSRF_SESSION_DISCONNECTED;
 234                         return NULL;
 235
 236         }
 237 }
 238
 239
 240
 241 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 242         if(session == NULL || msg == NULL) return 0;
 243
 244         if(msg->m_type == RESULT && session->type == OSRF_SESSION_CLIENT) {
 245                 osrf_app_session_push_queue( session, msg );
 246                 return 1;
 247         }
 248
 249         if(msg->m_type != REQUEST) return 1;
 250
 251         char* method = msg->method_name;
 252         char* app       = session->remote_service;
 253         jsonObject* params = msg->_params;
 254
 255         osrfAppRunMethod( app, method,  session, msg->thread_trace, params );
 256         osrfMessageFree(msg);
 257
 258         return 1;
 259 }
 260
 261