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