e11a571f14
really embodies a huge number of changes. We are now able to talk quite fluently to a French NT Terminal Server - in normal usage only minor font issues remain (handling of TEXT2 order is not perfect). The next major hurdle is encryption, and it will be quite a big hurdle - there seems to be some quite nasty session key stuff. git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@8 423420c4-83ab-492f-b58f-81f9feb106b5
585 lines
14 KiB
C
585 lines
14 KiB
C
/*
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rdesktop: A Remote Desktop Protocol client.
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Protocol services - Multipoint Communications Service
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Copyright (C) Matthew Chapman 1999-2000
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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 "includes.h"
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/* Establish a connection up to the MCS layer */
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HCONN mcs_connect(char *server)
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{
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HCONN conn;
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MCS_CONNECT_RESPONSE mcr;
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MCS_AUCF aucf;
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if ((conn = iso_connect(server)) == NULL)
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return NULL;
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mcs_send_connect_initial(conn);
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if (!iso_recv(conn) || !mcs_io_connect_response(&conn->in, &mcr))
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{
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ERROR("MCS error, expected Connect-Response\n");
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iso_disconnect(conn);
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return NULL;
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}
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if (mcr.result != 0)
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{
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ERROR("MCS-Connect-Initial failed, result %d\n", mcr.result);
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iso_disconnect(conn);
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return NULL;
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}
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mcs_send_edrq(conn);
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mcs_send_aurq(conn);
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if (!iso_recv(conn) || !mcs_io_aucf(&conn->in, &aucf))
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{
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ERROR("MCS error, expected AUcf\n");
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mcs_disconnect(conn);
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return NULL;
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}
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if (aucf.result != 0)
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{
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ERROR("AUrq failed, result %d\n", mcr.result);
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mcs_disconnect(conn);
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return NULL;
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}
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conn->mcs_userid = aucf.userid;
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if (!mcs_join_channel(conn, aucf.userid + 1001)
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|| !mcs_join_channel(conn, MCS_GLOBAL_CHANNEL))
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{
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mcs_disconnect(conn);
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return NULL;
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}
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return conn;
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}
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BOOL mcs_join_channel(HCONN conn, uint16 chanid)
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{
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MCS_CJCF cjcf;
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mcs_send_cjrq(conn, chanid);
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if (!iso_recv(conn) || !mcs_io_cjcf(&conn->in, &cjcf))
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{
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ERROR("MCS error, expected CJcf\n");
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return False;
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}
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if (cjcf.result != 0)
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{
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ERROR("CJrq failed, result %d\n", cjcf.result);
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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 MCS layer */
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void mcs_disconnect(HCONN conn)
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{
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/* Not complete */
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iso_disconnect(conn);
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}
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/* Send a Connect-Initial message */
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void mcs_send_connect_initial(HCONN conn)
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{
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MCS_CONNECT_INITIAL mci;
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iso_init(conn);
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mcs_make_connect_initial(&mci);
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mcs_io_connect_initial(&conn->out, &mci);
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MARK_END(conn->out);
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iso_send(conn);
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}
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/* Send a EDrq message */
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void mcs_send_edrq(HCONN conn)
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{
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MCS_EDRQ edrq;
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iso_init(conn);
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edrq.height = edrq.interval = 1;
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mcs_io_edrq(&conn->out, &edrq);
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MARK_END(conn->out);
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iso_send(conn);
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}
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/* Send a AUrq message */
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void mcs_send_aurq(HCONN conn)
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{
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MCS_AURQ aurq;
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iso_init(conn);
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mcs_io_aurq(&conn->out, &aurq);
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MARK_END(conn->out);
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iso_send(conn);
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}
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/* Send a CJrq message */
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void mcs_send_cjrq(HCONN conn, uint16 chanid)
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{
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MCS_CJRQ cjrq;
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iso_init(conn);
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cjrq.userid = conn->mcs_userid;
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cjrq.chanid = chanid;
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mcs_io_cjrq(&conn->out, &cjrq);
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MARK_END(conn->out);
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iso_send(conn);
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}
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/* Initialise MCS transport data packet */
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void mcs_init_data(HCONN conn)
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{
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iso_init(conn);
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PUSH_LAYER(conn->out, mcs_offset, 8);
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}
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/* Transmit MCS transport data packet */
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void mcs_send_data(HCONN conn, uint16 chanid, BOOL request)
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{
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MCS_DATA dt;
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POP_LAYER(conn->out, mcs_offset);
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dt.userid = conn->mcs_userid;
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dt.chanid = chanid;
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dt.flags = 0x70;
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dt.length = conn->out.end - conn->out.offset - 8;
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mcs_io_data(&conn->out, &dt, request);
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iso_send(conn);
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}
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/* Receive a message on the MCS layer */
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BOOL mcs_recv(HCONN conn, BOOL request)
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{
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MCS_DATA data;
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if (!iso_recv(conn) || !mcs_io_data(&conn->in, &data, request))
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return False;
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conn->in.rdp_offset = conn->in.offset;
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return True;
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}
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/* Initialise a DOMAIN_PARAMS structure */
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void mcs_make_domain_params(DOMAIN_PARAMS *dp, uint16 max_channels,
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uint16 max_users, uint16 max_tokens, uint16 max_pdusize)
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{
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dp->max_channels = max_channels;
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dp->max_users = max_users;
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dp->max_tokens = max_tokens;
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dp->num_priorities = 1;
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dp->min_throughput = 0;
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dp->max_height = 1;
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dp->max_pdusize = max_pdusize;
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dp->ver_protocol = 2;
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}
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/* RDP-specific 'user data'. Let's just get this right for now - to be
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decoded later. */
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char precanned_connect_userdata[] = {
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0x00,0x05,0x00,0x14,0x7c,0x00,0x01,0x80,0x9e,0x00,0x08,0x00,0x10,0x00,
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0x01,0xc0,0x00,0x44,0x75,0x63,0x61,0x80,0x90,0x01,0xc0,0x88,0x00,0x01,
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0x00,0x08,0x00,0x80,0x02,0xe0,0x01,0x01,0xca,0x03,0xaa,0x09,0x04,0x00,
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0x00,0xa3,0x01,0x00,0x00,0x52,0x00,0x45,0x00,0x53,0x00,0x31,0x00,0x2d,
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0x00,0x4e,0x00,0x45,0x00,0x57,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x0c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x01,0xca,0x00,0x00,0x02,0xc0,0x08,0x00,
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/* encryption disabled */ 0x00,0x00,0x00,0x00 };
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char precanned_connect_userdata_e[] = {
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0x00,
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0x05,0x00,0x14,0x7c,0x00,0x01,0x80,0x9e,0x00,0x08,0x00,0x10,0x00,0x01,0xc0,0x00,
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0x44,0x75,0x63,0x61,0x80,0x90,0x01,0xc0,0x88,0x00,0x01,0x00,0x08,0x00,0x80,0x02,
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0xe0,0x01,0x01,0xca,0x03,0xaa,0x09,0x04,0x00,0x00,0xa3,0x01,0x00,0x00,0x57,0x00,
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0x49,0x00,0x4e,0x00,0x39,0x00,0x35,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x0c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xca,0x00,0x00,0x02,0xc0,
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0x08,0x00,0x01,0x00,0x00,0x00
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};
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char domain_data[] = {0x01};
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/* Initialise a MCS_CONNECT_INITIAL structure */
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void mcs_make_connect_initial(MCS_CONNECT_INITIAL *mci)
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{
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mci->calling_domain.length = 1;
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mci->calling_domain.data = domain_data;
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mci->called_domain.length = 1;
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mci->called_domain.data = domain_data;
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mci->upward_flag = 0xff;
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mcs_make_domain_params(&mci->target_params, 2, 2, 0, 0xffff);
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mcs_make_domain_params(&mci->minimum_params, 1, 1, 1, 0x420);
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mcs_make_domain_params(&mci->maximum_params, 0xffff, 0xfc17, 0xffff,
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0xffff);
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mci->user_data.length = sizeof(precanned_connect_userdata);
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mci->user_data.data = precanned_connect_userdata;
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mci->length = 2*2 + 3 + 3*34 + 4 + mci->user_data.length;
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}
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/* Marshall/demarshall an ASN.1 BER header */
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BOOL ber_io_header(STREAM s, BOOL islong, int tagval, int *length)
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{
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uint16 word_tag;
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uint8 byte_tag;
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uint16 word_len;
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uint8 byte_len;
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uint8 byte_int;
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int tag;
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BOOL res;
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/* Read/write tag */
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if (islong)
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{
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word_tag = tagval;
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res = msb_io_uint16(s, &word_tag);
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tag = word_tag;
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}
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else
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{
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byte_tag = tagval;
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res = prs_io_uint8(s, &byte_tag);
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tag = byte_tag;
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}
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if (!res || (tag != tagval))
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{
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ERROR("Invalid ASN.1 tag\n");
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return False;
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}
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/* Read/write length */
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if (s->marshall)
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{
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if (*length >= 0x80)
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{
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byte_len = 0x82;
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word_len = (uint16)*length;
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res = prs_io_uint8(s, &byte_len);
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res = res ? msb_io_uint16(s, &word_len) : False;
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}
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else
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{
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byte_len = (uint8)*length;
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res = prs_io_uint8(s, &byte_len);
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}
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}
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else
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{
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if (!prs_io_uint8(s, &byte_len))
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return False;
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if (byte_len & 0x80)
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{
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byte_len &= ~0x80;
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*length = 0;
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while (byte_len--)
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{
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if (!prs_io_uint8(s, &byte_int))
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return False;
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*length <<= 8;
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*length += byte_int;
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}
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}
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else *length = byte_len;
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}
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return res;
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}
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/* Marshall/demarshall an octet string (ASN.1 BER) */
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BOOL ber_io_octet_string(STREAM s, OCTET_STRING *os)
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{
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if (!ber_io_header(s, False, 4, &os->length))
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return False;
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if (os->length > s->end - s->offset)
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return False;
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if (s->marshall)
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{
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memcpy(s->data + s->offset, os->data, os->length);
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}
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else
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{
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os->data = malloc(os->length);
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memcpy(os->data, s->data + s->offset, os->length);
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}
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s->offset += os->length;
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return True;
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}
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/* Marshall/demarshall an integer (ASN.1 BER) */
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BOOL ber_io_integer(STREAM s, uint16 *word_int)
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{
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int length = 2;
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uint8 byte_int;
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BOOL res;
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if (!ber_io_header(s, False, 2, &length))
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return False;
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if (s->marshall)
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{
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res = msb_io_uint16(s, word_int);
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}
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else
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{
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*word_int = 0;
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while (length--)
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{
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if (!prs_io_uint8(s, &byte_int))
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return False;
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*word_int <<= 8;
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*word_int += byte_int;
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}
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}
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return res;
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}
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/* Marshall/demarshall a simple uint8 type (ASN.1 BER) */
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BOOL ber_io_uint8(STREAM s, uint8 *i, int tagval)
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{
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int length = 1;
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if (!ber_io_header(s, False, tagval, &length))
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return False;
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if (length != 1)
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{
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ERROR("Wrong length for simple type\n");
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return False;
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}
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return prs_io_uint8(s, i);
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}
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/* Marshall/demarshall a DOMAIN_PARAMS structure (ASN.1 BER) */
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BOOL mcs_io_domain_params(STREAM s, DOMAIN_PARAMS *dp)
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{
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int length = 32;
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BOOL res;
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res = ber_io_header(s, False, 0x30, &length);
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res = res ? ber_io_integer(s, &dp->max_channels ) : False;
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res = res ? ber_io_integer(s, &dp->max_users ) : False;
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res = res ? ber_io_integer(s, &dp->max_tokens ) : False;
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res = res ? ber_io_integer(s, &dp->num_priorities) : False;
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res = res ? ber_io_integer(s, &dp->min_throughput) : False;
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res = res ? ber_io_integer(s, &dp->max_height ) : False;
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res = res ? ber_io_integer(s, &dp->max_pdusize ) : False;
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res = res ? ber_io_integer(s, &dp->ver_protocol ) : False;
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return res;
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}
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/* Marshall/demarshall a MCS_CONNECT_INITIAL structure (ASN.1 BER) */
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BOOL mcs_io_connect_initial(STREAM s, MCS_CONNECT_INITIAL *mci)
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{
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BOOL res;
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res = ber_io_header(s, True, 0x7f65, &mci->length);
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res = res ? ber_io_octet_string (s, &mci->calling_domain) : False;
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res = res ? ber_io_octet_string (s, &mci->called_domain ) : False;
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res = res ? ber_io_uint8 (s, &mci->upward_flag, 1) : False;
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res = res ? mcs_io_domain_params(s, &mci->target_params ) : False;
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res = res ? mcs_io_domain_params(s, &mci->minimum_params) : False;
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res = res ? mcs_io_domain_params(s, &mci->maximum_params) : False;
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res = res ? ber_io_octet_string (s, &mci->user_data ) : False;
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return res;
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}
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/* Marshall/demarshall a MCS_CONNECT_RESPONSE structure (ASN.1 BER) */
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BOOL mcs_io_connect_response(STREAM s, MCS_CONNECT_RESPONSE *mcr)
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{
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BOOL res;
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res = ber_io_header(s, True, 0x7f66, &mcr->length);
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res = res ? ber_io_uint8 (s, &mcr->result, 10 ) : False;
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res = res ? ber_io_integer (s, &mcr->connect_id ) : False;
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res = res ? mcs_io_domain_params(s, &mcr->domain_params) : False;
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res = res ? ber_io_octet_string (s, &mcr->user_data ) : False;
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return res;
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}
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/* Marshall/demarshall an EDrq structure (ASN.1 PER) */
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BOOL mcs_io_edrq(STREAM s, MCS_EDRQ *edrq)
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{
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uint8 opcode = (1) << 2;
|
|
uint8 pkt_opcode = opcode;
|
|
BOOL res;
|
|
|
|
res = prs_io_uint8(s, &pkt_opcode);
|
|
if (pkt_opcode != opcode)
|
|
{
|
|
ERROR("Expected EDrq, received %x\n", pkt_opcode);
|
|
return False;
|
|
}
|
|
|
|
res = res ? msb_io_uint16(s, &edrq->height ) : False;
|
|
res = res ? msb_io_uint16(s, &edrq->interval) : False;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Marshall/demarshall an AUrq structure (ASN.1 PER) */
|
|
BOOL mcs_io_aurq(STREAM s, MCS_AURQ *aurq)
|
|
{
|
|
uint8 opcode = (10) << 2;
|
|
uint8 pkt_opcode = opcode;
|
|
BOOL res;
|
|
|
|
res = prs_io_uint8(s, &pkt_opcode);
|
|
if (pkt_opcode != opcode)
|
|
{
|
|
ERROR("Expected AUrq, received %x\n", pkt_opcode);
|
|
return False;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Marshall/demarshall an AUcf structure (ASN.1 PER) */
|
|
BOOL mcs_io_aucf(STREAM s, MCS_AUCF *aucf)
|
|
{
|
|
uint8 opcode = (11) << 2;
|
|
uint8 pkt_opcode = opcode | 2;
|
|
BOOL res;
|
|
|
|
res = prs_io_uint8(s, &pkt_opcode);
|
|
if ((pkt_opcode & 0xfc) != opcode)
|
|
{
|
|
ERROR("Expected AUcf, received %x\n", pkt_opcode);
|
|
return False;
|
|
}
|
|
|
|
res = res ? prs_io_uint8 (s, &aucf->result) : False;
|
|
if (pkt_opcode & 2)
|
|
res = res ? msb_io_uint16(s, &aucf->userid) : False;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Marshall/demarshall an CJrq structure (ASN.1 PER) */
|
|
BOOL mcs_io_cjrq(STREAM s, MCS_CJRQ *cjrq)
|
|
{
|
|
uint8 opcode = (14) << 2;
|
|
uint8 pkt_opcode = opcode;
|
|
BOOL res;
|
|
|
|
res = prs_io_uint8(s, &pkt_opcode);
|
|
if (pkt_opcode != opcode)
|
|
{
|
|
ERROR("Expected CJrq, received %x\n", pkt_opcode);
|
|
return False;
|
|
}
|
|
|
|
res = res ? msb_io_uint16(s, &cjrq->userid) : False;
|
|
res = res ? msb_io_uint16(s, &cjrq->chanid) : False;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Marshall/demarshall an CJcf structure (ASN.1 PER) */
|
|
BOOL mcs_io_cjcf(STREAM s, MCS_CJCF *cjcf)
|
|
{
|
|
uint8 opcode = (15) << 2;
|
|
uint8 pkt_opcode = opcode | 2;
|
|
BOOL res;
|
|
|
|
res = prs_io_uint8(s, &pkt_opcode);
|
|
if ((pkt_opcode & 0xfc) != opcode)
|
|
{
|
|
ERROR("Expected CJcf, received %x\n", pkt_opcode);
|
|
return False;
|
|
}
|
|
|
|
res = res ? prs_io_uint8 (s, &cjcf->result) : False;
|
|
res = res ? msb_io_uint16(s, &cjcf->userid) : False;
|
|
res = res ? msb_io_uint16(s, &cjcf->req_chanid) : False;
|
|
if (pkt_opcode & 2)
|
|
res = res ? msb_io_uint16(s, &cjcf->join_chanid) : False;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Marshall/demarshall an SDrq or SDin packet (ASN.1 PER) */
|
|
BOOL mcs_io_data(STREAM s, MCS_DATA *dt, BOOL request)
|
|
{
|
|
uint8 opcode = (request ? 25 : 26) << 2;
|
|
uint8 pkt_opcode = opcode;
|
|
uint8 byte1, byte2;
|
|
BOOL res;
|
|
|
|
res = prs_io_uint8(s, &pkt_opcode);
|
|
if (pkt_opcode != opcode)
|
|
{
|
|
ERROR("Expected MCS data, received %x\n", pkt_opcode);
|
|
return False;
|
|
}
|
|
|
|
res = res ? msb_io_uint16(s, &dt->userid) : False;
|
|
res = res ? msb_io_uint16(s, &dt->chanid) : False;
|
|
res = res ? prs_io_uint8 (s, &dt->flags ) : False;
|
|
|
|
if (s->marshall)
|
|
{
|
|
dt->length |= 0x8000;
|
|
res = res ? msb_io_uint16(s, &dt->length) : False;
|
|
}
|
|
else
|
|
{
|
|
res = res ? prs_io_uint8(s, &byte1) : False;
|
|
if (byte1 & 0x80)
|
|
{
|
|
res = res ? prs_io_uint8(s, &byte2) : False;
|
|
dt->length = ((byte1 & ~0x80) << 8) + byte2;
|
|
}
|
|
else dt->length = byte1;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|