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
  43
  44                 /* if we've received a jabber layer error message (probably talking to
  45                         someone who no longer exists) and we're not talking to the original
  46                         remote id for this server, consider it a redirect and pass it up */
  47                 if(msg->is_error) {
  48                         warning_handler( "Received Jabber layer error message" );
  49
  50                         if(strcmp(session->remote_id,session->orig_remote_id)) {
  51                                 warning_handler( "Treating jabber error as redirect for tt [%d] "
  52                                         "and session [%s]", arr[i]->thread_trace, session->session_id );
  53
  54                                 arr[i]->m_type = STATUS;
  55                                 arr[i]->status_code = OSRF_STATUS_REDIRECTED;
  56
  57                         } else {
  58                                 warning_handler(" * Jabber Error is for top level remote id [%s], no one "
  59                                                 "to send my message too!!!", session->remote_id );
  60                         }
  61                 }
  62
  63                 osrf_stack_message_handler( session, arr[i] );
  64         }
  65
  66         message_free( msg );
  67
  68         return 1;
  69 }
  70
  71 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  72         if(session == NULL || msg == NULL)
  73                 return 0;
  74
  75         osrf_message* ret_msg = NULL;
  76         if( session->type ==  OSRF_SESSION_CLIENT )
  77                  ret_msg = _do_client( session, msg );
  78         else
  79                 ret_msg= _do_server( session, msg );
  80
  81         if(ret_msg)
  82                 osrf_stack_application_handler( session, ret_msg );
  83         else
  84                 osrf_message_free(msg);
  85
  86         return 1;
  87
  88 }
  89
  90 /** If we return a message, that message should be passed up the stack,
  91   * if we return NULL, we're finished for now...
  92   */
  93 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
  94         if(session == NULL || msg == NULL)
  95                 return NULL;
  96
  97         osrf_message* new_msg;
  98
  99         if( msg->m_type == STATUS ) {
 100
 101                 switch( msg->status_code ) {
 102
 103                         case OSRF_STATUS_OK:
 104                                 debug_handler("We connected successfully");
 105                                 session->state = OSRF_SESSION_CONNECTED;
 106                                 debug_handler( "State: %x => %s => %d", session, session->session_id, session->state );
 107                                 return NULL;
 108
 109                         case OSRF_STATUS_COMPLETE:
 110                                 osrf_app_session_set_complete( session, msg->thread_trace );
 111                                 return NULL;
 112
 113                         case OSRF_STATUS_REDIRECTED:
 114                                 osrf_app_session_reset_remote( session );
 115                                 session->state = OSRF_SESSION_DISCONNECTED;
 116                                 osrf_app_session_request_resend( session, msg->thread_trace );
 117                                 return NULL;
 118
 119                         case OSRF_STATUS_EXPFAILED:
 120                                 osrf_app_session_reset_remote( session );
 121                                 session->state = OSRF_SESSION_DISCONNECTED;
 122                                 osrf_app_session_request_resend( session, msg->thread_trace );
 123                                 return NULL;
 124
 125                         case OSRF_STATUS_TIMEOUT:
 126                                 osrf_app_session_reset_remote( session );
 127                                 session->state = OSRF_SESSION_DISCONNECTED;
 128                                 osrf_app_session_request_resend( session, msg->thread_trace );
 129                                 return NULL;
 130
 131
 132                         default:
 133                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 134                                 osrf_message_set_status_info( new_msg,
 135                                                 msg->status_name, msg->status_text, msg->status_code );
 136                                 warning_handler("The stack doesn't know what to do with "
 137                                                 "the provided message code: %d, name %s. Passing UP.",
 138                                                 msg->status_code, msg->status_name );
 139                                 new_msg->is_exception = 1;
 140                                 osrf_app_session_set_complete( session, msg->thread_trace );
 141                                 osrf_message_free(msg);
 142                                 return new_msg;
 143                 }
 144
 145                 return NULL;
 146
 147         } else if( msg->m_type == RESULT )
 148                 return msg;
 149
 150         return NULL;
 151
 152 }
 153
 154
 155 /** If we return a message, that message should be passed up the stack,
 156   * if we return NULL, we're finished for now...
 157   */
 158 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 159         if(session == NULL || msg == NULL)
 160                 return NULL;
 161
 162         warning_handler( "We dont' do servers yet !!" );
 163
 164         return msg;
 165 }
 166
 167
 168
 169
 170 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 171         if(session == NULL || msg == NULL)
 172                 return 0;
 173
 174         if(msg->m_type == RESULT) {
 175                 osrf_app_session_push_queue( session, msg );
 176                 return 1;
 177         }
 178
 179         warning_handler( "application_handler can't handle whatever you sent, type %d", msg->m_type);
 180
 181         return 1;
 182
 183 }