protocol_raw.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 <arpa/inet.h>
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include "trbase.h"
#include "trio.h"
#include "tr/protocol/raw.h"
#include "tr/protocol/message_raw.h"
#include "tr/interface/protocol.h"
static
int
protocolRawCtor(void * _this, va_list * params)
{
return 0;
}
static void protocolRawDtor(void * _this) {}
static
TR_ProtoMessage
protocolRawCreateMessage(void * _this, va_list * args)
{
return (TR_ProtoMessage)TR_new(TR_ProtoMessageRaw);
}
static
TR_RemoteData
protocolRawParse(void * _this, TR_ProtoMessage _message, TR_RemoteData _data)
{
TR_ProtoMessageRaw message = (TR_ProtoMessageRaw)_message;
size_t size = ((TR_SizedData)_data)->size;
char * data = ((TR_SizedData)_data)->data;
TR_RemoteData retval = NULL;
if (! message->data) {
if (message->size == 0) {
if (size == 1) {
message->size = *(char *)data << 8;
TR_delete(_data);
return NULL;
} else {
message->size = *(uint16_t *)data;
size -= 2;
data += 2;
}
} else {
message->size &= *(char *)data;
size--;
data++;
}
message->size = ntohs(message->size);
message->data = TR_malloc(message->size);
}
if (size >= message->size - message->size_done) {
memcpy(
message->data + message->size_done,
data,
message->size - message->size_done);
size -= message->size - message->size_done;
data += message->size - message->size_done;
message->size_done = message->size;
_message->ready = 1;
if (size) {
retval = TR_new(TR_RemoteData, data, size, _data->remote);
}
} else {
memcpy(message->data + message->size_done, data, size);
message->size_done += size;
}
TR_delete(_data);
return retval;
}
static
TR_RemoteData
protocolRawCompose(void * _this, TR_ProtoMessage _message)
{
TR_ProtoMessageRaw message = (TR_ProtoMessageRaw)_message;
TR_SizedData data;
data = (TR_SizedData)TR_new(TR_RemoteData, NULL, 0, _message->remote);
data->size = message->size + 2;
data->data = TR_malloc(data->size);
*(uint16_t *)data->data = htons(message->size);
memcpy(data->data+2, message->data, message->size);
return (TR_RemoteData)data;
}
TR_INIT_IFACE(TR_Class, protocolRawCtor, protocolRawDtor, NULL);
TR_INIT_IFACE(
TR_Protocol,
protocolRawCreateMessage,
protocolRawCreateMessage,
protocolRawCreateMessage,
protocolRawParse,
protocolRawCompose);
TR_CREATE_CLASS(
TR_ProtocolRaw,
TR_Protocol,
NULL,
TR_IF(TR_Class),
TR_IF(TR_Protocol));
// vim: set ts=4 sw=4: