1 files changed, 170 insertions, 0 deletions

diff --git a/noncore/net/opierdesktop/iso.cpp b/noncore/net/opierdesktop/iso.cpp
new file mode 100644
index 0000000..0fa1a17
--- a/dev/null
+++ b/noncore/net/opierdesktop/iso.cpp
@@ -0,0 +1,170 @@
+/*
+   rdesktop: A Remote Desktop Protocol client.
+   Protocol services - ISO layer
+   Copyright (C) Matthew Chapman 1999-2002
+   
+   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.
+*/
+
+#include "rdesktop.h"
+
+/* Send a self-contained ISO PDU */
+static void
+iso_send_msg(uint8 code)
+{
+        STREAM s;
+
+        s = tcp_init(11);
+
+                out_uint8(s, 3);/* version */
+                out_uint8(s, 0);/* reserved */
+                out_uint16_be(s, 11);/* length */
+
+                out_uint8(s, 6);/* hdrlen */
+        out_uint8(s, code);
+                out_uint16(s, 0);/* dst_ref */
+                out_uint16(s, 0);/* src_ref */
+                out_uint8(s, 0);/* class */
+
+        s_mark_end(s);
+        tcp_send(s);
+}
+
+/* Receive a message on the ISO layer, return code */
+static STREAM
+iso_recv_msg(uint8 * code)
+{
+        STREAM s;
+        uint16 length;
+        uint8 version;
+
+        s = tcp_recv(4);
+        if (s == NULL)
+        {
+                return NULL;
+        }
+
+        in_uint8(s, version);
+        if (version != 3)
+        {
+                error("TPKT v%d\n", version);
+                return NULL;
+        }
+
+                in_uint8s(s, 1);/* pad */
+        in_uint16_be(s, length);
+
+        s = tcp_recv(length - 4);
+        if (s == NULL)
+                return NULL;
+
+                in_uint8s(s, 1);/* hdrlen */
+        in_uint8(s, *code);
+
+        if (*code == ISO_PDU_DT)
+        {
+                        in_uint8s(s, 1);/* eot */
+                return s;
+        }
+
+                in_uint8s(s, 5);/* dst_ref, src_ref, class */
+        return s;
+}
+
+/* Initialise ISO transport data packet */
+STREAM
+iso_init(int length)
+{
+        STREAM s;
+
+        s = tcp_init(length + 7);
+        s_push_layer(s, iso_hdr, 7);
+
+        return s;
+}
+
+/* Send an ISO data PDU */
+void
+iso_send(STREAM s)
+{
+        uint16 length;
+
+        s_pop_layer(s, iso_hdr);
+        length = s->end - s->p;
+
+                out_uint8(s, 3);/* version */
+                out_uint8(s, 0);/* reserved */
+        out_uint16_be(s, length);
+
+                out_uint8(s, 2);/* hdrlen */
+                out_uint8(s, ISO_PDU_DT);/* code */
+                out_uint8(s, 0x80);/* eot */
+
+        tcp_send(s);
+}
+
+/* Receive ISO transport data packet */
+STREAM
+iso_recv(void)
+{
+        STREAM s;
+        uint8 code;
+
+        s = iso_recv_msg(&code);
+        if (s == NULL)
+                return NULL;
+
+        if (code != ISO_PDU_DT)
+        {
+                error("expected DT, got 0x%x\n", code);
+                return NULL;
+        }
+
+        return s;
+}
+
+/* Establish a connection up to the ISO layer */
+BOOL
+iso_connect(char *server)
+{
+        uint8 code;
+
+        if (!tcp_connect(server))
+                return False;
+
+        iso_send_msg(ISO_PDU_CR);
+
+        if (iso_recv_msg(&code) == NULL)
+        {
+                return False;
+        }
+
+        if (code != ISO_PDU_CC)
+        {
+                error("expected CC, got 0x%x\n", code);
+                tcp_disconnect();
+                return False;
+        }
+
+        return True;
+}
+
+/* Disconnect from the ISO layer */
+void
+iso_disconnect(void)
+{
+        iso_send_msg(ISO_PDU_DR);
+        tcp_disconnect();
+}