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/*
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2004-2007
tcp layer
*/
#include "libxrdp.h"
/*****************************************************************************/
struct xrdp_tcp* APP_CC
xrdp_tcp_create(struct xrdp_iso* owner, int sck)
{
struct xrdp_tcp* self;
DEBUG((" in xrdp_tcp_create"));
self = (struct xrdp_tcp*)g_malloc(sizeof(struct xrdp_tcp), 1);
self->iso_layer = owner;
self->sck = sck;
DEBUG((" out xrdp_tcp_create"));
return self;
}
/*****************************************************************************/
void APP_CC
xrdp_tcp_delete(struct xrdp_tcp* self)
{
g_free(self);
}
/*****************************************************************************/
/* get out stream ready for data */
/* returns error */
int APP_CC
xrdp_tcp_init(struct xrdp_tcp* self, struct stream* s)
{
init_stream(s, 8192);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_tcp_recv(struct xrdp_tcp* self, struct stream* s, int len)
{
int rcvd;
struct xrdp_session* session;
if (self->sck_closed)
{
DEBUG((" in xrdp_tcp_recv, sck closed"));
return 1;
}
DEBUG((" in xrdp_tcp_recv, gota get %d bytes", len));
session = self->iso_layer->mcs_layer->sec_layer->rdp_layer->session;
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))
{
if (!g_tcp_can_recv(self->sck, 10))
{
if (session->is_term != 0)
{
if (session->is_term())
{
DEBUG((" out xrdp_tcp_recv, terminated"));
return 1;
}
}
}
}
else
{
self->sck_closed = 1;
DEBUG((" error = -1 in xrdp_tcp_recv socket %d", self->sck));
return 1;
}
}
else if (rcvd == 0)
{
self->sck_closed = 1;
DEBUG((" error = 0 in xrdp_tcp_recv socket %d", self->sck));
return 1;
}
else
{
s->end += rcvd;
len -= rcvd;
}
}
DEBUG((" out xrdp_tcp_recv"));
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_tcp_send(struct xrdp_tcp* self, struct stream* s)
{
int len;
int total;
int sent;
struct xrdp_session* session;
if (self->sck_closed)
{
DEBUG((" in xrdp_tcp_send, sck closed"));
return 1;
}
len = s->end - s->data;
DEBUG((" in xrdp_tcp_send, gota send %d bytes", len));
session = self->iso_layer->mcs_layer->sec_layer->rdp_layer->session;
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))
{
if (!g_tcp_can_send(self->sck, 10))
{
if (session->is_term != 0)
{
if (session->is_term())
{
DEBUG((" out xrdp_tcp_send, terminated"));
return 1;
}
}
}
}
else
{
self->sck_closed = 1;
DEBUG((" error = -1 in xrdp_tcp_send socket %d", self->sck));
return 1;
}
}
else if (sent == 0)
{
self->sck_closed = 1;
DEBUG((" error = 0 in xrdp_tcp_send socket %d", self->sck));
return 1;
}
else
{
#if defined(XRDP_DEBUG)
g_hexdump(s->data + total, sent);
#endif
total = total + sent;
}
}
DEBUG((" out xrdp_tcp_send, sent %d bytes ok", len));
return 0;
}
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