OpenSRF/src/libstack/osrf_stack.c

   1 #include "opensrf/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         debug_handler("osrf_stack_process going into client_recv");
   8         transport_message* msg = client_recv( client, timeout );
   9         debug_handler("osrf_stack_process after client_recv");
  10         if(msg == NULL) return 0;
  11         debug_handler( "Received message from transport code from %s", msg->sender );
  12         int status = osrf_stack_transport_handler( msg );
  13
  14         /* see if there are multiple message to be received */
  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 );
  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 ) {
  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         osrf_app_session* session = osrf_app_session_find_session( msg->thread );
  40
  41         if( session == NULL ) {  /* we must be a server, build a new session */
  42                 info_handler( "Received message for nonexistant session. Dropping..." );
  43                 message_free( msg );
  44                 return 1;
  45         }
  46
  47         debug_handler("Session [%s] found, building message", msg->thread );
  48
  49         osrf_app_session_set_remote( session, msg->sender );
  50         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  51         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  52         int num_msgs = osrf_message_from_xml( msg->body, arr );
  53
  54         debug_handler( "We received %d messages from %s", num_msgs, msg->sender );
  55
  56         /* XXX ERROR CHECKING, BAD XML, ETC... */
  57         int i;
  58         for( i = 0; i != num_msgs; i++ ) {
  59
  60
  61                 /* if we've received a jabber layer error message (probably talking to
  62                         someone who no longer exists) and we're not talking to the original
  63                         remote id for this server, consider it a redirect and pass it up */
  64                 if(msg->is_error) {
  65                         warning_handler( "Received Jabber layer error message" );
  66
  67                         if(strcmp(session->remote_id,session->orig_remote_id)) {
  68                                 warning_handler( "Treating jabber error as redirect for tt [%d] "
  69                                         "and session [%s]", arr[i]->thread_trace, session->session_id );
  70
  71                                 arr[i]->m_type = STATUS;
  72                                 arr[i]->status_code = OSRF_STATUS_REDIRECTED;
  73
  74                         } else {
  75                                 warning_handler(" * Jabber Error is for top level remote id [%s], no one "
  76                                                 "to send my message too!!!", session->remote_id );
  77                         }
  78                 }
  79
  80                 osrf_stack_message_handler( session, arr[i] );
  81                 debug_handler("transport layer: message_handler returned, do we have more?");
  82         }
  83
  84         debug_handler("transport layer: no more messages to process in this batch");
  85         message_free( msg );
  86         debug_handler("after msg delete");
  87
  88         return 1;
  89 }
  90
  91 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  92         if(session == NULL || msg == NULL)
  93                 return 0;
  94
  95         osrf_message* ret_msg = NULL;
  96         if( session->type ==  OSRF_SESSION_CLIENT )
  97                  ret_msg = _do_client( session, msg );
  98         else
  99                 ret_msg= _do_server( session, msg );
 100
 101         if(ret_msg)
 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_REDIRECTED:
 134                                 osrf_app_session_reset_remote( session );
 135                                 session->state = OSRF_SESSION_DISCONNECTED;
 136                                 osrf_app_session_request_resend( session, msg->thread_trace );
 137                                 return NULL;
 138
 139                         case OSRF_STATUS_EXPFAILED:
 140                                 osrf_app_session_reset_remote( session );
 141                                 session->state = OSRF_SESSION_DISCONNECTED;
 142                                 osrf_app_session_request_resend( session, msg->thread_trace );
 143                                 return NULL;
 144
 145                         case OSRF_STATUS_TIMEOUT:
 146                                 osrf_app_session_reset_remote( session );
 147                                 session->state = OSRF_SESSION_DISCONNECTED;
 148                                 osrf_app_session_request_resend( session, msg->thread_trace );
 149                                 return NULL;
 150
 151
 152                         default:
 153                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 154                                 osrf_message_set_status_info( new_msg,
 155                                                 msg->status_name, msg->status_text, msg->status_code );
 156                                 warning_handler("The stack doesn't know what to do with "
 157                                                 "the provided message code: %d, name %s. Passing UP.",
 158                                                 msg->status_code, msg->status_name );
 159                                 new_msg->is_exception = 1;
 160                                 osrf_app_session_set_complete( session, msg->thread_trace );
 161                                 osrf_message_free(msg);
 162                                 return new_msg;
 163                 }
 164
 165                 return NULL;
 166
 167         } else if( msg->m_type == RESULT )
 168                 return msg;
 169
 170         return NULL;
 171
 172 }
 173
 174
 175 /** If we return a message, that message should be passed up the stack,
 176   * if we return NULL, we're finished for now...
 177   */
 178 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 179         if(session == NULL || msg == NULL)
 180                 return NULL;
 181
 182         warning_handler( "We dont' do servers yet !!" );
 183
 184         return msg;
 185 }
 186
 187
 188
 189
 190 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 191         if(session == NULL || msg == NULL)
 192                 return 0;
 193
 194         if(msg->m_type == RESULT) {
 195                 osrf_app_session_push_queue( session, msg );
 196                 return 1;
 197         }
 198
 199         warning_handler( "application_handler can't handle whatever you sent, type %d", msg->m_type);
 200
 201         return 1;
 202
 203 }