datagram_service.c
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/**
* \file
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2014 Georg Hopp
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include <stdint.h>
#include <sys/types.h>
#include "trbase.h"
#include "trio.h"
#include "trdata.h"
#include "tr/datagram_service.h"
#include "tr/interface/protocol.h"
#include "tr/interface/comm_end_point.h"
static
int
datagramServiceCtor(void * _this, va_list * params)
{
TR_PARENTCALL(TR_DatagramService, _this, TR_Class, ctor, params);
return 0;
}
static
void
datagramServiceDtor(void * _this)
{
TR_PARENTCALL(TR_DatagramService, _this, TR_Class, dtor);
}
static
TR_ProtoMessage
datagramServiceNextMessage(void * _this)
{
TR_CommEndPoint comm = _this;
TR_RemoteData data = TR_queueGet(comm->read_buffer);
TR_ProtoMessage ret_message = NULL;
size_t end;
if (NULL == data) return ret_message;
ret_message = TR_protoCreateMessage(comm->protocol, data->remote);
end = TR_protoParse(comm->protocol, ret_message, data);
if (end != ((TR_SizedData)data)->size) {
/**
* TODO
* This means that the parser has not consumed all of the data.
* We do not know the reason, but with HTTP this should only occur
* when the message is complete... anyway, to prevent us from
* looping forever because a protocol implementation is buggy
* we should close the connection after end was 0 the second time.
* This can be done by firing a close event.
*/
switch(end) {
default:
{
TR_RemoteData new_data = TR_new(
TR_RemoteData,
((TR_SizedData)data)->data + end,
((TR_SizedData)data)->size - end,
data->remote);
TR_delete(data);
data = new_data;
}
// intended drop through
case 0:
TR_queuePutFirst(comm->read_buffer, data);
}
}
if (! ret_message->ready) {
TR_delete(ret_message);
}
return ret_message;
}
static
int
datagramServiceCompose(void * _this, TR_ProtoMessage message)
{
TR_RemoteData data =
TR_protoCompose(((TR_CommEndPoint)_this)->protocol, message);
if (! data) {
return FALSE;
}
TR_queuePut(((TR_CommEndPoint)_this)->write_buffer, data);
return TRUE;
}
intptr_t datagramService_events[TR_CEP_EVENT_MAX + 1];
TR_INIT_IFACE(TR_Class, datagramServiceCtor, datagramServiceDtor, NULL);
TR_INIT_IFACE(
TR_CommEndPoint,
datagramServiceNextMessage,
datagramServiceCompose);
TR_CREATE_CLASS(
TR_DatagramService,
TR_CommEndPoint,
NULL,
TR_IF(TR_Class),
TR_IF(TR_CommEndPoint)) = {
{{
TR_CEP_EVENT_MAX + 1,
datagramService_events
}}
};
// vim: set ts=4 sw=4: