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