From b7060e8a4a01aba11df7ceb2198a4c2452b4e503 Mon Sep 17 00:00:00 2001
From: jsorg71 <jsorg71>
Date: Thu, 15 Jul 2004 03:19:29 +0000
Subject: [PATCH] added xrdp_iso.c

---
 xrdp/xrdp_iso.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 xrdp/xrdp_iso.c

diff --git a/xrdp/xrdp_iso.c b/xrdp/xrdp_iso.c
new file mode 100644
index 00000000..d2ec20a0
--- /dev/null
+++ b/xrdp/xrdp_iso.c
@@ -0,0 +1,147 @@
+/*
+   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.
+
+   Copyright (C) Jay Sorg 2004
+
+   iso layer
+
+*/
+
+#include "xrdp.h"
+
+/*****************************************************************************/
+struct xrdp_iso* xrdp_iso_create(struct xrdp_mcs* owner)
+{
+  struct xrdp_iso* self;
+
+  self = (struct xrdp_iso*)g_malloc(sizeof(struct xrdp_iso), 1);
+  self->owner = owner;
+  self->in_s = owner->in_s;
+  self->out_s = owner->out_s;
+  self->tcp_layer = xrdp_tcp_create(self);
+  return self;
+}
+
+/*****************************************************************************/
+void xrdp_iso_delete(struct xrdp_iso* self)
+{
+  xrdp_tcp_delete(self->tcp_layer);
+  g_free(self);
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_iso_recv_msg(struct xrdp_iso* self, int* code)
+{
+  int ver;
+  int len;
+
+  *code = 0;
+  if (xrdp_tcp_recv(self->tcp_layer, 4) != 0)
+    return 1;
+  in_uint8(self->in_s, ver);
+  if (ver != 3)
+    return 1;
+  in_uint8s(self->in_s, 1);
+  in_uint16_be(self->in_s, len);
+  if (xrdp_tcp_recv(self->tcp_layer, len - 4) != 0)
+    return 1;
+  in_uint8s(self->in_s, 1);
+  in_uint8(self->in_s, *code);
+  if (*code == ISO_PDU_DT)
+  {
+    in_uint8s(self->in_s, 1);
+  }
+  else
+  {
+    in_uint8s(self->in_s, 5);
+  }
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_iso_recv(struct xrdp_iso* self)
+{
+  int code;
+
+  if (xrdp_iso_recv_msg(self, &code) != 0)
+    return 1;
+  if (code != ISO_PDU_DT)
+    return 1;
+  return 0;
+}
+
+/*****************************************************************************/
+int xrdp_iso_send_msg(struct xrdp_iso* self, int code)
+{
+  if (xrdp_tcp_init(self->tcp_layer, 11) != 0)
+    return 1;
+  out_uint8(self->out_s, 3);
+  out_uint8(self->out_s, 0);
+  out_uint16_be(self->out_s, 11); /* length */
+  out_uint8(self->out_s, 8);
+  out_uint8(self->out_s, code);
+  out_uint16(self->out_s, 0);
+  out_uint16(self->out_s, 0);
+  out_uint8(self->out_s, 0);
+  s_mark_end(self->out_s);
+  if (xrdp_tcp_send(self->tcp_layer) != 0)
+    return 1;
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_iso_incoming(struct xrdp_iso* self)
+{
+  int code;
+
+  if (xrdp_iso_recv_msg(self, &code) != 0)
+    return 1;
+  if (code != ISO_PDU_CR)
+    return 1;
+  if (xrdp_iso_send_msg(self, ISO_PDU_CC) != 0)
+    return 1;
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_iso_init(struct xrdp_iso* self, int len)
+{
+  xrdp_tcp_init(self->tcp_layer, len + 7);
+  s_push_layer(self->out_s, iso_hdr, 7);
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_iso_send(struct xrdp_iso* self)
+{
+  int len;
+
+  s_pop_layer(self->out_s, iso_hdr);
+  len = self->out_s->end - self->out_s->p;
+  out_uint8(self->out_s, 3);
+  out_uint8(self->out_s, 0);
+  out_uint16_be(self->out_s, len);
+  out_uint8(self->out_s, 2);
+  out_uint8(self->out_s, ISO_PDU_DT);
+  out_uint8(self->out_s, 0x80);
+  if (xrdp_tcp_send(self->tcp_layer) != 0)
+    return 1;
+  return 0;
+}