rdesktop/trunk/iso.c

/* -*- c-basic-offset: 8 -*-
   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);
}

static void
iso_send_connection_request(char *username)
{
        STREAM s;
        int length = 30 + strlen(username);

        s = tcp_init(length);

        out_uint8(s, 3);        /* version */
        out_uint8(s, 0);        /* reserved */
        out_uint16_be(s, length);       /* length */

        out_uint8(s, length - 5);       /* hdrlen */
        out_uint8(s, ISO_PDU_CR);
        out_uint16(s, 0);       /* dst_ref */
        out_uint16(s, 0);       /* src_ref */
        out_uint8(s, 0);        /* class */

        out_uint8p(s, "Cookie: mstshash=", strlen("Cookie: mstshash="));
        out_uint8p(s, username, strlen(username));

        out_uint8(s, 0x0d);     /* Unknown */
        out_uint8(s, 0x0a);     /* Unknown */

        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;

        next_packet:
        s = tcp_recv(NULL, 4);
        if (s == NULL)
                return NULL;

        in_uint8(s, version);
        switch (version & 3)
        {
                case 0:
                        in_uint8(s, length);
                        if (length & 0x80)
                        {
                                length &= ~0x80;
                                next_be(s, length);
                        }
                        break;

                case 3:
                        in_uint8s(s, 1);        /* pad */
                        in_uint16_be(s, length);
                        break;

                default:
                        error("TPKT v%d\n", version);
                        return NULL;
        }

        s = tcp_recv(s, length - 4);
        if (s == NULL)
                return NULL;

        if ((version & 3) == 0)
        {
                rdp5_process(s, version & 0x80);
                goto next_packet;
        }

        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, char *username)
{
        uint8 code;

        if (!tcp_connect(server))
                return False;

        iso_send_connection_request(username);

        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();
}
1	forsberg	347	/* -- c-basic-offset: 8 --
2	matty	3	rdesktop: A Remote Desktop Protocol client.
3			Protocol services - ISO layer
4	matthewc	207	Copyright (C) Matthew Chapman 1999-2002
5	matty	3
6			This program is free software; you can redistribute it and/or modify
7			it under the terms of the GNU General Public License as published by
8			the Free Software Foundation; either version 2 of the License, or
9			(at your option) any later version.
10
11			This program is distributed in the hope that it will be useful,
12			but WITHOUT ANY WARRANTY; without even the implied warranty of
13			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			GNU General Public License for more details.
15
16			You should have received a copy of the GNU General Public License
17			along with this program; if not, write to the Free Software
18			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19			*/
20
21	matty	10	#include "rdesktop.h"
22	matty	3
23	matty	10	/* Send a self-contained ISO PDU */
24	matty	25	static void
25			iso_send_msg(uint8 code)
26	matty	3	{
27	matty	10	STREAM s;
28	matty	3
29	matty	10	s = tcp_init(11);
30	matty	3
31	matty	24	out_uint8(s, 3); /* version */
32			out_uint8(s, 0); /* reserved */
33			out_uint16_be(s, 11); /* length */
34	matty	3
35	matty	24	out_uint8(s, 6); /* hdrlen */
36	matty	10	out_uint8(s, code);
37	matty	24	out_uint16(s, 0); /* dst_ref */
38			out_uint16(s, 0); /* src_ref */
39			out_uint8(s, 0); /* class */
40	matty	10
41			s_mark_end(s);
42			tcp_send(s);
43			}
44
45	forsberg	347	static void
46			iso_send_connection_request(char *username)
47			{
48			STREAM s;
49			int length = 30 + strlen(username);
50
51			s = tcp_init(length);
52
53			out_uint8(s, 3); /* version */
54			out_uint8(s, 0); /* reserved */
55			out_uint16_be(s, length); /* length */
56
57			out_uint8(s, length - 5); /* hdrlen */
58			out_uint8(s, ISO_PDU_CR);
59			out_uint16(s, 0); /* dst_ref */
60			out_uint16(s, 0); /* src_ref */
61			out_uint8(s, 0); /* class */
62
63			out_uint8p(s, "Cookie: mstshash=", strlen("Cookie: mstshash="));
64			out_uint8p(s, username, strlen(username));
65
66			out_uint8(s, 0x0d); /* Unknown */
67			out_uint8(s, 0x0a); /* Unknown */
68
69			s_mark_end(s);
70			tcp_send(s);
71			}
72
73	matty	10	/* Receive a message on the ISO layer, return code */
74	matty	25	static STREAM
75	astrand	64	iso_recv_msg(uint8 * code)
76	matty	10	{
77			STREAM s;
78			uint16 length;
79			uint8 version;
80
81	jsorg71	438	next_packet:
82	matthewc	423	s = tcp_recv(NULL, 4);
83	matty	10	if (s == NULL)
84	matty	33	return NULL;
85	matty	10
86			in_uint8(s, version);
87	forsberg	347	switch (version & 3)
88	matty	3	{
89	forsberg	347	case 0:
90			in_uint8(s, length);
91			if (length & 0x80)
92			{
93			length &= ~0x80;
94			next_be(s, length);
95			}
96			break;
97
98			case 3:
99			in_uint8s(s, 1); /* pad */
100			in_uint16_be(s, length);
101			break;
102
103			default:
104			error("TPKT v%d\n", version);
105			return NULL;
106	matty	3	}
107
108	matthewc	423	s = tcp_recv(s, length - 4);
109	matty	10	if (s == NULL)
110	matty	33	return NULL;
111	matty	10
112	forsberg	347	if ((version & 3) == 0)
113			{
114	matthewc	423	rdp5_process(s, version & 0x80);
115	forsberg	347	goto next_packet;
116			}
117
118	matty	24	in_uint8s(s, 1); /* hdrlen */
119	matty	10	in_uint8(s, *code);
120
121			if (*code == ISO_PDU_DT)
122			{
123	matty	24	in_uint8s(s, 1); /* eot */
124			return s;
125	matty	10	}
126
127	matty	24	in_uint8s(s, 5); /* dst_ref, src_ref, class */
128	matty	10	return s;
129	matty	3	}
130
131	matty	10	/* Initialise ISO transport data packet */
132	matty	25	STREAM
133			iso_init(int length)
134	matty	3	{
135	matty	10	STREAM s;
136	matty	3
137	matty	10	s = tcp_init(length + 7);
138			s_push_layer(s, iso_hdr, 7);
139
140			return s;
141	matty	3	}
142
143	matty	10	/* Send an ISO data PDU */
144	matty	25	void
145			iso_send(STREAM s)
146	matty	3	{
147	matty	10	uint16 length;
148	matty	3
149	matty	10	s_pop_layer(s, iso_hdr);
150			length = s->end - s->p;
151	matty	3
152	matty	24	out_uint8(s, 3); /* version */
153			out_uint8(s, 0); /* reserved */
154	matty	10	out_uint16_be(s, length);
155	matty	3
156	matty	24	out_uint8(s, 2); /* hdrlen */
157			out_uint8(s, ISO_PDU_DT); /* code */
158			out_uint8(s, 0x80); /* eot */
159	matty	10
160			tcp_send(s);
161	matty	3	}
162
163			/* Receive ISO transport data packet */
164	matty	25	STREAM
165	matthewc	192	iso_recv(void)
166	matty	3	{
167	matty	10	STREAM s;
168	matty	3	uint8 code;
169
170	matty	10	s = iso_recv_msg(&code);
171	matty	33	if (s == NULL)
172			return NULL;
173
174			if (code != ISO_PDU_DT)
175	matty	3	{
176	matty	33	error("expected DT, got 0x%x\n", code);
177			return NULL;
178	matty	3	}
179
180	matty	10	return s;
181	matty	3	}
182
183	matty	10	/* Establish a connection up to the ISO layer */
184	matty	25	BOOL
185	forsberg	347	iso_connect(char server, char username)
186	matty	3	{
187	matty	10	uint8 code;
188	matty	3
189	matty	10	if (!tcp_connect(server))
190			return False;
191	matty	3
192	forsberg	347	iso_send_connection_request(username);
193	matty	3
194	matty	33	if (iso_recv_msg(&code) == NULL)
195			return False;
196
197			if (code != ISO_PDU_CC)
198	matty	3	{
199	matty	33	error("expected CC, got 0x%x\n", code);
200	matty	10	tcp_disconnect();
201	matty	3	return False;
202			}
203
204			return True;
205			}
206
207	matty	10	/* Disconnect from the ISO layer */
208	matty	25	void
209	matthewc	192	iso_disconnect(void)
210	matty	3	{
211	matty	10	iso_send_msg(ISO_PDU_DR);
212			tcp_disconnect();
213	matty	3	}