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         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 from %s", msg->sender );
  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                 message_free( msg );
  42                 return 1;
  43         }
  44
  45         debug_handler("Session [%s] found, building message", msg->thread );
  46
  47         osrf_app_session_set_remote( session, msg->sender );
  48         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  49         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  50         int num_msgs = osrf_message_from_xml( msg->body, arr );
  51
  52         debug_handler( "We received %d messages from %s", num_msgs, msg->sender );
  53
  54         /* XXX ERROR CHECKING, BAD XML, ETC... */
  55         int i;
  56         for( i = 0; i != num_msgs; i++ ) {
  57
  58
  59                 /* if we've received a jabber layer error message (probably talking to
  60                         someone who no longer exists) and we're not talking to the original
  61                         remote id for this server, consider it a redirect and pass it up */
  62                 if(msg->is_error) {
  63                         warning_handler( "Received Jabber layer error message" );
  64
  65                         if(strcmp(session->remote_id,session->orig_remote_id)) {
  66                                 warning_handler( "Treating jabber error as redirect for tt [%d] "
  67                                         "and session [%s]", arr[i]->thread_trace, session->session_id );
  68
  69                                 arr[i]->m_type = STATUS;
  70                                 arr[i]->status_code = OSRF_STATUS_REDIRECTED;
  71
  72                         } else {
  73                                 warning_handler(" * Jabber Error is for top level remote id [%s], no one "
  74                                                 "to send my message too!!!", session->remote_id );
  75                         }
  76                 }
  77
  78                 osrf_stack_message_handler( session, arr[i] );
  79         }
  80
  81         message_free( msg );
  82
  83         return 1;
  84 }
  85
  86 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  87         if(session == NULL || msg == NULL)
  88                 return 0;
  89
  90         osrf_message* ret_msg = NULL;
  91         if( session->type ==  OSRF_SESSION_CLIENT )
  92                  ret_msg = _do_client( session, msg );
  93         else
  94                 ret_msg= _do_server( session, msg );
  95
  96         if(ret_msg)
  97                 osrf_stack_application_handler( session, ret_msg );
  98         else
  99                 osrf_message_free(msg);
 100
 101         return 1;
 102
 103 }
 104
 105 /** If we return a message, that message should be passed up the stack,
 106   * if we return NULL, we're finished for now...
 107   */
 108 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
 109         if(session == NULL || msg == NULL)
 110                 return NULL;
 111
 112         osrf_message* new_msg;
 113
 114         if( msg->m_type == STATUS ) {
 115
 116                 switch( msg->status_code ) {
 117
 118                         case OSRF_STATUS_OK:
 119                                 debug_handler("We connected successfully");
 120                                 session->state = OSRF_SESSION_CONNECTED;
 121                                 debug_handler( "State: %x => %s => %d", session, session->session_id, session->state );
 122                                 return NULL;
 123
 124                         case OSRF_STATUS_COMPLETE:
 125                                 osrf_app_session_set_complete( session, msg->thread_trace );
 126                                 return NULL;
 127
 128                         case OSRF_STATUS_REDIRECTED:
 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_EXPFAILED:
 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                         case OSRF_STATUS_TIMEOUT:
 141                                 osrf_app_session_reset_remote( session );
 142                                 session->state = OSRF_SESSION_DISCONNECTED;
 143                                 osrf_app_session_request_resend( session, msg->thread_trace );
 144                                 return NULL;
 145
 146
 147                         default:
 148                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 149                                 osrf_message_set_status_info( new_msg,
 150                                                 msg->status_name, msg->status_text, msg->status_code );
 151                                 warning_handler("The stack doesn't know what to do with "
 152                                                 "the provided message code: %d, name %s. Passing UP.",
 153                                                 msg->status_code, msg->status_name );
 154                                 new_msg->is_exception = 1;
 155                                 osrf_app_session_set_complete( session, msg->thread_trace );
 156                                 osrf_message_free(msg);
 157                                 return new_msg;
 158                 }
 159
 160                 return NULL;
 161
 162         } else if( msg->m_type == RESULT )
 163                 return msg;
 164
 165         return NULL;
 166
 167 }
 168
 169
 170 /** If we return a message, that message should be passed up the stack,
 171   * if we return NULL, we're finished for now...
 172   */
 173 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 174         if(session == NULL || msg == NULL)
 175                 return NULL;
 176
 177         warning_handler( "We dont' do servers yet !!" );
 178
 179         return msg;
 180 }
 181
 182
 183
 184
 185 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 186         if(session == NULL || msg == NULL)
 187                 return 0;
 188
 189         if(msg->m_type == RESULT) {
 190                 osrf_app_session_push_queue( session, msg );
 191                 return 1;
 192         }
 193
 194         warning_handler( "application_handler can't handle whatever you sent, type %d", msg->m_type);
 195
 196         return 1;
 197
 198 }