src/libstack/osrf_stack.c

   1 #include "osrf_stack.h"
   2
   3 osrf_message* _do_client( osrf_app_session*, osrf_message* );
   4 osrf_message* _do_server( osrf_app_session*, osrf_message* );
   5
   6 int osrf_stack_process( transport_client* client, int timeout ) {
   7         transport_message* msg = client_recv( client, timeout );
   8         if(msg == NULL) return 0;
   9         debug_handler( "Received message from transport code from %s", msg->sender );
  10         int status = osrf_stack_transport_handler( msg );
  11
  12         /* see if there are multiple message to be received */
  13         while(1) {
  14                 transport_message* m = client_recv( client, 0 );
  15                 if(m) {
  16                         debug_handler( "Received additional message from transport code");
  17                         status = osrf_stack_transport_handler( m );
  18                 } else  {
  19                         debug_handler( "osrf_stack_process returning with only 1 received message" );
  20                         break;
  21                 }
  22         }
  23
  24         return status;
  25 }
  26
  27
  28
  29 // -----------------------------------------------------------------------------
  30 // Entry point into the stack
  31 // -----------------------------------------------------------------------------
  32 int osrf_stack_transport_handler( transport_message* msg ) {
  33
  34         debug_handler( "Transport handler received new message \nfrom %s "
  35                         "to %s with body \n\n%s\n", msg->sender, msg->recipient, msg->body );
  36
  37         osrf_app_session* session = osrf_app_session_find_session( msg->thread );
  38
  39         if( session == NULL ) {  /* we must be a server, build a new session */
  40                 info_handler( "Received message for nonexistant session. Dropping..." );
  41                 message_free( msg );
  42                 return 1;
  43         }
  44
  45         debug_handler("Session [%s] found, building message", msg->thread );
  46
  47         osrf_app_session_set_remote( session, msg->sender );
  48         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  49         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  50         int num_msgs = osrf_message_from_xml( msg->body, arr );
  51
  52         debug_handler( "We received %d messages from %s", num_msgs, msg->sender );
  53
  54         /* XXX ERROR CHECKING, BAD XML, ETC... */
  55         int i;
  56         for( i = 0; i != num_msgs; i++ ) {
  57
  58
  59                 /* if we've received a jabber layer error message (probably talking to
  60                         someone who no longer exists) and we're not talking to the original
  61                         remote id for this server, consider it a redirect and pass it up */
  62                 if(msg->is_error) {
  63                         warning_handler( "Received Jabber layer error message" );
  64
  65                         if(strcmp(session->remote_id,session->orig_remote_id)) {
  66                                 warning_handler( "Treating jabber error as redirect for tt [%d] "
  67                                         "and session [%s]", arr[i]->thread_trace, session->session_id );
  68
  69                                 arr[i]->m_type = STATUS;
  70                                 arr[i]->status_code = OSRF_STATUS_REDIRECTED;
  71
  72                         } else {
  73                                 warning_handler(" * Jabber Error is for top level remote id [%s], no one "
  74                                                 "to send my message too!!!", session->remote_id );
  75                         }
  76                 }
  77
  78                 osrf_stack_message_handler( session, arr[i] );
  79                 debug_handler("transport layer: message_handler returned, do we have more?");
  80         }
  81
  82         debug_handler("transport layer: no more messages to process in this batch");
  83         message_free( msg );
  84         debug_handler("after msg delete");
  85
  86         return 1;
  87 }
  88
  89 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  90         if(session == NULL || msg == NULL)
  91                 return 0;
  92
  93         osrf_message* ret_msg = NULL;
  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                 osrf_stack_application_handler( session, ret_msg );
 101         else
 102                 osrf_message_free(msg);
 103
 104         return 1;
 105
 106 }
 107
 108 /** If we return a message, that message should be passed up the stack,
 109   * if we return NULL, we're finished for now...
 110   */
 111 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
 112         if(session == NULL || msg == NULL)
 113                 return NULL;
 114
 115         osrf_message* new_msg;
 116
 117         if( msg->m_type == STATUS ) {
 118
 119                 switch( msg->status_code ) {
 120
 121                         case OSRF_STATUS_OK:
 122                                 debug_handler("We connected successfully");
 123                                 session->state = OSRF_SESSION_CONNECTED;
 124                                 debug_handler( "State: %x => %s => %d", session, session->session_id, session->state );
 125                                 return NULL;
 126
 127                         case OSRF_STATUS_COMPLETE:
 128                                 osrf_app_session_set_complete( session, msg->thread_trace );
 129                                 return NULL;
 130
 131                         case OSRF_STATUS_REDIRECTED:
 132                                 osrf_app_session_reset_remote( session );
 133                                 session->state = OSRF_SESSION_DISCONNECTED;
 134                                 osrf_app_session_request_resend( session, msg->thread_trace );
 135                                 return NULL;
 136
 137                         case OSRF_STATUS_EXPFAILED:
 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_TIMEOUT:
 144                                 osrf_app_session_reset_remote( session );
 145                                 session->state = OSRF_SESSION_DISCONNECTED;
 146                                 osrf_app_session_request_resend( session, msg->thread_trace );
 147                                 return NULL;
 148
 149
 150                         default:
 151                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 152                                 osrf_message_set_status_info( new_msg,
 153                                                 msg->status_name, msg->status_text, msg->status_code );
 154                                 warning_handler("The stack doesn't know what to do with "
 155                                                 "the provided message code: %d, name %s. Passing UP.",
 156                                                 msg->status_code, msg->status_name );
 157                                 new_msg->is_exception = 1;
 158                                 osrf_app_session_set_complete( session, msg->thread_trace );
 159                                 osrf_message_free(msg);
 160                                 return new_msg;
 161                 }
 162
 163                 return NULL;
 164
 165         } else if( msg->m_type == RESULT )
 166                 return msg;
 167
 168         return NULL;
 169
 170 }
 171
 172
 173 /** If we return a message, that message should be passed up the stack,
 174   * if we return NULL, we're finished for now...
 175   */
 176 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 177         if(session == NULL || msg == NULL)
 178                 return NULL;
 179
 180         warning_handler( "We dont' do servers yet !!" );
 181
 182         return msg;
 183 }
 184
 185
 186
 187
 188 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 189         if(session == NULL || msg == NULL)
 190                 return 0;
 191
 192         if(msg->m_type == RESULT) {
 193                 osrf_app_session_push_queue( session, msg );
 194                 return 1;
 195         }
 196
 197         warning_handler( "application_handler can't handle whatever you sent, type %d", msg->m_type);
 198
 199         return 1;
 200
 201 }