b120a50f44
Bump version to 1.2-cvs. git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@206 423420c4-83ab-492f-b58f-81f9feb106b5
167 lines
3.0 KiB
C
167 lines
3.0 KiB
C
/*
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rdesktop: A Remote Desktop Protocol client.
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Protocol services - ISO layer
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Copyright (C) Matthew Chapman 1999-2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "rdesktop.h"
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/* Send a self-contained ISO PDU */
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static void
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iso_send_msg(uint8 code)
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{
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STREAM s;
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s = tcp_init(11);
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out_uint8(s, 3); /* version */
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out_uint8(s, 0); /* reserved */
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out_uint16_be(s, 11); /* length */
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out_uint8(s, 6); /* hdrlen */
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out_uint8(s, code);
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out_uint16(s, 0); /* dst_ref */
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out_uint16(s, 0); /* src_ref */
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out_uint8(s, 0); /* class */
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s_mark_end(s);
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tcp_send(s);
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}
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/* Receive a message on the ISO layer, return code */
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static STREAM
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iso_recv_msg(uint8 * code)
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{
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STREAM s;
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uint16 length;
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uint8 version;
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s = tcp_recv(4);
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if (s == NULL)
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return NULL;
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in_uint8(s, version);
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if (version != 3)
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{
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error("TPKT v%d\n", version);
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return NULL;
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}
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in_uint8s(s, 1); /* pad */
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in_uint16_be(s, length);
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s = tcp_recv(length - 4);
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if (s == NULL)
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return NULL;
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in_uint8s(s, 1); /* hdrlen */
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in_uint8(s, *code);
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if (*code == ISO_PDU_DT)
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{
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in_uint8s(s, 1); /* eot */
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return s;
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}
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in_uint8s(s, 5); /* dst_ref, src_ref, class */
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return s;
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}
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/* Initialise ISO transport data packet */
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STREAM
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iso_init(int length)
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{
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STREAM s;
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s = tcp_init(length + 7);
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s_push_layer(s, iso_hdr, 7);
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return s;
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}
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/* Send an ISO data PDU */
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void
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iso_send(STREAM s)
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{
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uint16 length;
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s_pop_layer(s, iso_hdr);
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length = s->end - s->p;
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out_uint8(s, 3); /* version */
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out_uint8(s, 0); /* reserved */
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out_uint16_be(s, length);
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out_uint8(s, 2); /* hdrlen */
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out_uint8(s, ISO_PDU_DT); /* code */
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out_uint8(s, 0x80); /* eot */
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tcp_send(s);
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}
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/* Receive ISO transport data packet */
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STREAM
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iso_recv(void)
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{
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STREAM s;
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uint8 code;
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s = iso_recv_msg(&code);
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if (s == NULL)
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return NULL;
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if (code != ISO_PDU_DT)
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{
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error("expected DT, got 0x%x\n", code);
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return NULL;
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}
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return s;
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}
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/* Establish a connection up to the ISO layer */
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BOOL
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iso_connect(char *server)
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{
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uint8 code;
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if (!tcp_connect(server))
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return False;
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iso_send_msg(ISO_PDU_CR);
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if (iso_recv_msg(&code) == NULL)
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return False;
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if (code != ISO_PDU_CC)
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{
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error("expected CC, got 0x%x\n", code);
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tcp_disconnect();
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return False;
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}
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return True;
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}
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/* Disconnect from the ISO layer */
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void
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iso_disconnect(void)
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{
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iso_send_msg(ISO_PDU_DR);
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tcp_disconnect();
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}
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