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