mcs.c File Reference

#include "rdesktop.h"

Include dependency graph for mcs.c:

Go to the source code of this file.

Functions
static BOOL	ber_parse_header (STREAM s, int tagval, int *length)
static void	ber_out_header (STREAM s, int tagval, int length)
static void	ber_out_integer (STREAM s, int value)
static void	mcs_out_domain_params (STREAM s, int max_channels, int max_users, int max_tokens, int max_pdusize)
static BOOL	mcs_parse_domain_params (STREAM s)
static BOOL	mcs_send_connect_initial (RDPCLIENT *This, STREAM mcs_data)
static BOOL	mcs_recv_connect_response (RDPCLIENT *This, STREAM mcs_data)
static BOOL	mcs_send_edrq (RDPCLIENT *This)
static BOOL	mcs_send_aurq (RDPCLIENT *This)
static BOOL	mcs_recv_aucf (RDPCLIENT *This, uint16 *mcs_userid)
static BOOL	mcs_send_cjrq (RDPCLIENT *This, uint16 chanid)
static BOOL	mcs_recv_cjcf (RDPCLIENT *This)
STREAM	mcs_init (RDPCLIENT *This, int length)
BOOL	mcs_send_to_channel (RDPCLIENT *This, STREAM s, uint16 channel)
BOOL	mcs_send (RDPCLIENT *This, STREAM s)
STREAM	mcs_recv (RDPCLIENT *This, uint16 *channel, uint8 *rdpver)
BOOL	mcs_connect (RDPCLIENT *This, char *server, char *cookie, STREAM mcs_data)
BOOL	mcs_reconnect (RDPCLIENT *This, char *server, char *cookie, STREAM mcs_data)
void	mcs_disconnect (RDPCLIENT *This)
void	mcs_reset_state (RDPCLIENT *This)

Function Documentation

ber_out_header()

static void ber_out_header ( STREAM  s, int  tagval, int  length  )

static

Definition at line 60 of file mcs.c.

{
    if (tagval > 0xff)
    {
        out_uint16_be(s, tagval);
    }
    else
    {
        out_uint8(s, tagval);
    }
 
    if (length >= 0x80)
    {
        out_uint8(s, 0x82);
        out_uint16_be(s, length);
    }
    else
        out_uint8(s, length);
}

ber_out_integer()

static void ber_out_integer ( STREAM  s, int  value  )

static

Definition at line 82 of file mcs.c.

{
    ber_out_header(s, BER_TAG_INTEGER, 2);
    out_uint16_be(s, value);
}

ber_parse_header()

static BOOL ber_parse_header ( STREAM  s, int  tagval, int *  length  )

static

Definition at line 25 of file mcs.c.

{
    int tag, len;
 
    if (tagval > 0xff)
    {
        in_uint16_be(s, tag);
    }
    else
    {
    in_uint8(s, tag)}
 
    if (tag != tagval)
    {
        error("expected tag %d, got %d\n", tagval, tag);
        return False;
    }
 
    in_uint8(s, len);
 
    if (len & 0x80)
    {
        len &= ~0x80;
        *length = 0;
        while (len--)
            next_be(s, *length);
    }
    else
        *length = len;
 
    return s_check(s);
}

mcs_connect()

BOOL mcs_connect	(	RDPCLIENT *	This,
		char *	server,
		char *	cookie,
		STREAM	mcs_data
	)

Definition at line 388 of file mcs.c.

{
    unsigned int i;
 
    if (!iso_connect(This, server, cookie))
        return False;
 
    if (!mcs_send_connect_initial(This, mcs_data) || !mcs_recv_connect_response(This, mcs_data))
        goto error;
 
    if (!mcs_send_edrq(This) || !mcs_send_aurq(This))
        goto error;
 
    if (!mcs_recv_aucf(This, &This->mcs_userid))
        goto error;
 
    if (!mcs_send_cjrq(This, This->mcs_userid + MCS_USERCHANNEL_BASE) || !mcs_recv_cjcf(This))
        goto error;
 
    if (!mcs_send_cjrq(This, MCS_GLOBAL_CHANNEL) || !mcs_recv_cjcf(This))
        goto error;
 
    for (i = 0; i < This->num_channels; i++)
    {
        if (!mcs_send_cjrq(This, MCS_GLOBAL_CHANNEL + 1 + i) || !mcs_recv_cjcf(This))
            goto error;
    }
    return True;
 
    error:
    iso_disconnect(This);
    return False;
}

Referenced by sec_connect().

mcs_disconnect()

void mcs_disconnect

(

RDPCLIENT *

This

)

Definition at line 460 of file mcs.c.

{
    iso_disconnect(This);
}

mcs_init()

STREAM mcs_init	(	RDPCLIENT *	This,
		int	length
	)

Definition at line 314 of file mcs.c.

{
    STREAM s;
 
    s = iso_init(This, length + 8);
 
    if(s == NULL)
        return NULL;
 
    s_push_layer(s, mcs_hdr, 8);
 
    return s;
}

mcs_out_domain_params()

static void mcs_out_domain_params ( STREAM  s, int  max_channels, int  max_users, int  max_tokens, int  max_pdusize  )

static

Definition at line 90 of file mcs.c.

{
    ber_out_header(s, MCS_TAG_DOMAIN_PARAMS, 32);
    ber_out_integer(s, max_channels);
    ber_out_integer(s, max_users);
    ber_out_integer(s, max_tokens);
    ber_out_integer(s, 1);  /* num_priorities */
    ber_out_integer(s, 0);  /* min_throughput */
    ber_out_integer(s, 1);  /* max_height */
    ber_out_integer(s, max_pdusize);
    ber_out_integer(s, 2);  /* ver_protocol */
}

mcs_parse_domain_params()

static BOOL mcs_parse_domain_params ( STREAM  s )

static

Definition at line 105 of file mcs.c.

{
    int length;
 
    ber_parse_header(s, MCS_TAG_DOMAIN_PARAMS, &length);
    in_uint8s(s, length);
 
    return s_check(s);
}

mcs_reconnect()

BOOL mcs_reconnect	(	RDPCLIENT *	This,
		char *	server,
		char *	cookie,
		STREAM	mcs_data
	)

Definition at line 424 of file mcs.c.

{
    unsigned int i;
 
    if (!iso_reconnect(This, server, cookie))
        return False;
 
    if (!mcs_send_connect_initial(This, mcs_data) || !mcs_recv_connect_response(This, mcs_data))
        goto error;
 
    if (!mcs_send_edrq(This) || !mcs_send_aurq(This))
        goto error;
 
    if (!mcs_recv_aucf(This, &This->mcs_userid))
        goto error;
 
    if (!mcs_send_cjrq(This, This->mcs_userid + MCS_USERCHANNEL_BASE) || !mcs_recv_cjcf(This))
        goto error;
 
    if (!mcs_send_cjrq(This, MCS_GLOBAL_CHANNEL) || !mcs_recv_cjcf(This))
        goto error;
 
    for (i = 0; i < This->num_channels; i++)
    {
        if (!mcs_send_cjrq(This, MCS_GLOBAL_CHANNEL + 1 + i) || !mcs_recv_cjcf(This))
            goto error;
    }
    return True;
 
      error:
    iso_disconnect(This);
    return False;
}

Referenced by sec_reconnect().

mcs_recv()

STREAM mcs_recv	(	RDPCLIENT *	This,
		uint16 *	channel,
		uint8 *	rdpver
	)

Definition at line 356 of file mcs.c.

{
    uint8 opcode, appid, length;
    STREAM s;
 
    s = iso_recv(This, rdpver);
    if (s == NULL)
        return NULL;
    if (rdpver != NULL)
        if (*rdpver != 3)
            return s;
    in_uint8(s, opcode);
    appid = opcode >> 2;
    if (appid != MCS_SDIN)
    {
        if (appid != MCS_DPUM)
        {
            error("expected data, got %d\n", opcode);
        }
        return NULL;
    }
    in_uint8s(s, 2);    /* userid */
    in_uint16_be(s, *channel);
    in_uint8s(s, 1);    /* flags */
    in_uint8(s, length);
    if (length & 0x80)
        in_uint8s(s, 1);    /* second byte of length */
    return s;
}

mcs_recv_aucf()

static BOOL mcs_recv_aucf ( RDPCLIENT *  This, uint16 *  mcs_userid  )

static

Definition at line 230 of file mcs.c.

{
    uint8 opcode, result;
    STREAM s;
 
    s = iso_recv(This, NULL);
    if (s == NULL)
        return False;
 
    in_uint8(s, opcode);
    if ((opcode >> 2) != MCS_AUCF)
    {
        error("expected AUcf, got %d\n", opcode);
        return False;
    }
 
    in_uint8(s, result);
    if (result != 0)
    {
        error("AUrq: %d\n", result);
        return False;
    }
 
    if (opcode & 2)
        in_uint16_be(s, *mcs_userid);
 
    return s_check_end(s);
}

mcs_recv_cjcf()

static BOOL mcs_recv_cjcf ( RDPCLIENT *  This )

static

Definition at line 282 of file mcs.c.

{
    uint8 opcode, result;
    STREAM s;
 
    s = iso_recv(This, NULL);
    if (s == NULL)
        return False;
 
    in_uint8(s, opcode);
    if ((opcode >> 2) != MCS_CJCF)
    {
        error("expected CJcf, got %d\n", opcode);
        return False;
    }
 
    in_uint8(s, result);
    if (result != 0)
    {
        error("CJrq: %d\n", result);
        return False;
    }
 
    in_uint8s(s, 4);    /* mcs_userid, req_chanid */
    if (opcode & 2)
        in_uint8s(s, 2);    /* join_chanid */
 
    return s_check_end(s);
}

mcs_recv_connect_response()

static BOOL mcs_recv_connect_response ( RDPCLIENT *  This, STREAM  mcs_data  )

static

Definition at line 150 of file mcs.c.

{
    uint8 result;
    int length;
    STREAM s;
 
    s = iso_recv(This, NULL);
    if (s == NULL)
        return False;
 
    ber_parse_header(s, MCS_CONNECT_RESPONSE, &length);
 
    ber_parse_header(s, BER_TAG_RESULT, &length);
    in_uint8(s, result);
    if (result != 0)
    {
        error("MCS connect: %d\n", result);
        return False;
    }
 
    ber_parse_header(s, BER_TAG_INTEGER, &length);
    in_uint8s(s, length);   /* connect id */
    mcs_parse_domain_params(s);
 
    ber_parse_header(s, BER_TAG_OCTET_STRING, &length);
 
    sec_process_mcs_data(This, s);
    /*
       if (length > mcs_data->size)
       {
       error("MCS data length %d, expected %d\n", length,
       mcs_data->size);
       length = mcs_data->size;
       }
 
       in_uint8a(s, mcs_data->data, length);
       mcs_data->p = mcs_data->data;
       mcs_data->end = mcs_data->data + length;
     */
    return s_check_end(s);
}

mcs_reset_state()

void mcs_reset_state

(

RDPCLIENT *

This

)

Definition at line 467 of file mcs.c.

{
    This->mcs_userid = 0;
    iso_reset_state(This);
}

mcs_send()

BOOL mcs_send	(	RDPCLIENT *	This,
		STREAM	s
	)

Definition at line 349 of file mcs.c.

{
    return mcs_send_to_channel(This, s, MCS_GLOBAL_CHANNEL);
}

mcs_send_aurq()

static BOOL mcs_send_aurq ( RDPCLIENT *  This )

static

Definition at line 213 of file mcs.c.

{
    STREAM s;
 
    s = iso_init(This, 1);
 
    if(s == NULL)
        return False;
 
    out_uint8(s, (MCS_AURQ << 2));
 
    s_mark_end(s);
    return iso_send(This, s);
}

mcs_send_cjrq()

static BOOL mcs_send_cjrq ( RDPCLIENT *  This, uint16  chanid  )

static

Definition at line 261 of file mcs.c.

{
    STREAM s;
 
    DEBUG_RDP5(("Sending CJRQ for channel #%d\n", chanid));
 
    s = iso_init(This, 5);
 
    if(s == NULL)
        return False;
 
    out_uint8(s, (MCS_CJRQ << 2));
    out_uint16_be(s, This->mcs_userid);
    out_uint16_be(s, chanid);
 
    s_mark_end(s);
    return iso_send(This, s);
}

mcs_send_connect_initial()

static BOOL mcs_send_connect_initial ( RDPCLIENT *  This, STREAM  mcs_data  )

static

Definition at line 117 of file mcs.c.

{
    int datalen = (uint16)(mcs_data->end - mcs_data->data);
    int length = 9 + 3 * 34 + 4 + datalen;
    STREAM s;
 
    s = iso_init(This, length + 5);
 
    if(s == NULL)
        return False;
 
    ber_out_header(s, MCS_CONNECT_INITIAL, length);
    ber_out_header(s, BER_TAG_OCTET_STRING, 1); /* calling domain */
    out_uint8(s, 1);
    ber_out_header(s, BER_TAG_OCTET_STRING, 1); /* called domain */
    out_uint8(s, 1);
 
    ber_out_header(s, BER_TAG_BOOLEAN, 1);
    out_uint8(s, 0xff); /* upward flag */
 
    mcs_out_domain_params(s, 34, 2, 0, 0xffff); /* target params */
    mcs_out_domain_params(s, 1, 1, 1, 0x420);   /* min params */
    mcs_out_domain_params(s, 0xffff, 0xfc17, 0xffff, 0xffff);   /* max params */
 
    ber_out_header(s, BER_TAG_OCTET_STRING, datalen);
    out_uint8p(s, mcs_data->data, datalen);
 
    s_mark_end(s);
    return iso_send(This, s);
}

mcs_send_edrq()

static BOOL mcs_send_edrq ( RDPCLIENT *  This )

static

Definition at line 194 of file mcs.c.

{
    STREAM s;
 
    s = iso_init(This, 5);
 
    if(s == NULL)
        return False;
 
    out_uint8(s, (MCS_EDRQ << 2));
    out_uint16_be(s, 1);    /* height */
    out_uint16_be(s, 1);    /* interval */
 
    s_mark_end(s);
    return iso_send(This, s);
}

mcs_send_to_channel()

BOOL mcs_send_to_channel	(	RDPCLIENT *	This,
		STREAM	s,
		uint16	channel
	)

Definition at line 330 of file mcs.c.

{
    uint16 length;
 
    s_pop_layer(s, mcs_hdr);
    length = (uint16)(s->end - s->p - 8);
    length |= 0x8000;
 
    out_uint8(s, (MCS_SDRQ << 2));
    out_uint16_be(s, This->mcs_userid);
    out_uint16_be(s, channel);
    out_uint8(s, 0x70); /* flags */
    out_uint16_be(s, length);
 
    return iso_send(This, s);
}