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         transport_message* msg = client_recv( client, timeout );
   8         if(msg == NULL) return 0;
   9         return osrf_stack_transport_handler( msg );
  10 }
  11
  12
  13
  14 // -----------------------------------------------------------------------------
  15 // Entry point into the stack
  16 // -----------------------------------------------------------------------------
  17 int osrf_stack_transport_handler( transport_message* msg ) {
  18
  19         debug_handler( "Transport handler received new message \nfrom %s "
  20                         "to %s with body \n\n%s\n", msg->sender, msg->recipient, msg->body );
  21
  22         osrf_app_session* session = osrf_app_session_find_session( msg->thread );
  23
  24         if( session == NULL ) {  /* we must be a server, build a new session */
  25                 info_handler( "Received message for nonexistant session. Dropping..." );
  26                 message_free( msg );
  27                 return 1;
  28         }
  29
  30         debug_handler("Session [%s] found, building message", msg->thread );
  31
  32         osrf_app_session_set_remote( session, msg->sender );
  33         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  34         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  35         int num_msgs = osrf_message_from_xml( msg->body, arr );
  36
  37         debug_handler( "We received %d messages from %s", num_msgs, msg->sender );
  38
  39         /* XXX ERROR CHECKING, BAD XML, ETC... */
  40         int i;
  41         for( i = 0; i != num_msgs; i++ ) {
  42                 osrf_stack_message_handler( session, arr[i] );
  43         }
  44
  45         message_free( msg );
  46
  47         return 1;
  48 }
  49
  50 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  51         if(session == NULL || msg == NULL)
  52                 return 0;
  53
  54         osrf_message* ret_msg = NULL;
  55         if( session->type ==  OSRF_SESSION_CLIENT )
  56                  ret_msg = _do_client( session, msg );
  57         else
  58                 ret_msg= _do_server( session, msg );
  59
  60         if(ret_msg)
  61                 osrf_stack_application_handler( session, ret_msg );
  62         else
  63                 osrf_message_free(msg);
  64
  65         return 1;
  66
  67 }
  68
  69 /** If we return a message, that message should be passed up the stack,
  70   * if we return NULL, we're finished for now...
  71   */
  72 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
  73         if(session == NULL || msg == NULL)
  74                 return NULL;
  75
  76         osrf_message* new_msg;
  77
  78         if( msg->m_type == STATUS ) {
  79
  80                 switch( msg->status_code ) {
  81
  82                         case OSRF_STATUS_OK:
  83                                 debug_handler("We connected successfully");
  84                                 session->state = OSRF_SESSION_CONNECTED;
  85                                 debug_handler( "State: %x => %s => %d", session, session->session_id, session->state );
  86                                 return NULL;
  87
  88                         case OSRF_STATUS_COMPLETE:
  89                                 osrf_app_session_set_complete( session, msg->thread_trace );
  90                                 return NULL;
  91
  92                         case OSRF_STATUS_REDIRECTED:
  93                                 osrf_app_session_reset_remote( session );
  94                                 session->state = OSRF_SESSION_DISCONNECTED;
  95                                 osrf_app_session_request_resend( session, msg->thread_trace );
  96                                 return NULL;
  97
  98                         case OSRF_STATUS_EXPFAILED:
  99                                 osrf_app_session_reset_remote( session );
 100                                 session->state = OSRF_SESSION_DISCONNECTED;
 101                                 osrf_app_session_request_resend( session, msg->thread_trace );
 102                                 return NULL;
 103
 104                         case OSRF_STATUS_TIMEOUT:
 105                                 osrf_app_session_reset_remote( session );
 106                                 session->state = OSRF_SESSION_DISCONNECTED;
 107                                 osrf_app_session_request_resend( session, msg->thread_trace );
 108                                 return NULL;
 109
 110
 111                         default:
 112                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 113                                 osrf_message_set_status_info( new_msg,
 114                                                 msg->status_name, msg->status_text, msg->status_code );
 115                                 warning_handler("The stack doesn't know what to do with "
 116                                                 "the provided message code: %d, name %s. Passing UP.",
 117                                                 msg->status_code, msg->status_name );
 118                                 new_msg->is_exception = 1;
 119                                 osrf_app_session_set_complete( session, msg->thread_trace );
 120                                 osrf_message_free(msg);
 121                                 return new_msg;
 122                 }
 123
 124                 return NULL;
 125
 126         } else if( msg->m_type == RESULT )
 127                 return msg;
 128
 129         return NULL;
 130
 131 }
 132
 133
 134 /** If we return a message, that message should be passed up the stack,
 135   * if we return NULL, we're finished for now...
 136   */
 137 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 138         if(session == NULL || msg == NULL)
 139                 return NULL;
 140
 141         warning_handler( "We dont' do servers yet !!" );
 142
 143         return msg;
 144 }
 145
 146
 147
 148
 149 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 150         if(session == NULL || msg == NULL)
 151                 return 0;
 152
 153         if(msg->m_type == RESULT) {
 154                 osrf_app_session_push_queue( session, msg );
 155                 return 1;
 156         }
 157
 158         warning_handler( "application_handler can't handle whatever you sent, type %d", msg->m_type);
 159
 160         return 1;
 161
 162 }