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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2013
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* librdp tcp layer
*/
#include "rdp.h"
/*****************************************************************************/
struct rdp_tcp *APP_CC
rdp_tcp_create(struct rdp_iso *owner)
{
struct rdp_tcp *self;
self = (struct rdp_tcp *)g_malloc(sizeof(struct rdp_tcp), 1);
self->iso_layer = owner;
return self;
}
/*****************************************************************************/
void APP_CC
rdp_tcp_delete(struct rdp_tcp *self)
{
g_free(self);
}
/*****************************************************************************/
/* get out stream ready for data */
/* returns error */
int APP_CC
rdp_tcp_init(struct rdp_tcp *self, struct stream *s)
{
init_stream(s, 8192);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_tcp_recv(struct rdp_tcp *self, struct stream *s, int len)
{
int rcvd;
DEBUG((" in rdp_tcp_recv gota get %d bytes on sck %d",
len, self->sck));
if (self->sck_closed)
{
DEBUG((" out rdp_tcp_recv error sck closed"));
return 1;
}
init_stream(s, len);
while (len > 0)
{
rcvd = g_tcp_recv(self->sck, s->end, len, 0);
if (rcvd == -1)
{
if (g_tcp_last_error_would_block(self->sck))
{
g_tcp_can_recv(self->sck, 10);
}
else
{
self->sck_closed = 1;
DEBUG((" out rdp_tcp_recv error unknown"));
return 1;
}
}
else if (rcvd == 0)
{
self->sck_closed = 1;
DEBUG((" out rdp_tcp_recv error connection dropped"));
return 1;
}
else
{
s->end += rcvd;
len -= rcvd;
}
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_tcp_send(struct rdp_tcp *self, struct stream *s)
{
int len;
int total;
int sent;
if (self->sck_closed)
{
DEBUG((" out rdp_tcp_send error sck closed"));
return 1;
}
len = s->end - s->data;
DEBUG((" in rdp_tcp_send gota send %d bytes on sck %d", len,
self->sck));
total = 0;
while (total < len)
{
sent = g_tcp_send(self->sck, s->data + total, len - total, 0);
if (sent == -1)
{
if (g_tcp_last_error_would_block(self->sck))
{
g_tcp_can_send(self->sck, 10);
}
else
{
self->sck_closed = 1;
DEBUG((" out rdp_tcp_send error unknown"));
return 1;
}
}
else if (sent == 0)
{
self->sck_closed = 1;
DEBUG((" out rdp_tcp_send error connection dropped"));
return 1;
}
else
{
total = total + sent;
}
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_tcp_connect(struct rdp_tcp *self, char *ip, char *port)
{
DEBUG((" in rdp_tcp_connect ip %s port %s", ip, port));
self->sck = g_tcp_socket();
if (self->sck < 0)
return 1;
if (g_tcp_connect(self->sck, ip, port) == 0)
{
g_tcp_set_non_blocking(self->sck);
}
else
{
DEBUG((" out rdp_tcp_connect error g_tcp_connect failed"));
return 1;
}
DEBUG((" out rdp_tcp_connect"));
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_tcp_disconnect(struct rdp_tcp *self)
{
if (self->sck != 0)
{
g_tcp_close(self->sck);
}
self->sck = 0;
return 0;
}
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