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