xrdp/rdp/rdp_rdp.c

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2012
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * librdp rdp layer
 */

#include "rdp.h"

#ifndef NULL
#define NULL 0
#endif

/*****************************************************************************/
struct rdp_rdp *APP_CC
rdp_rdp_create(struct mod *owner)
{
    struct rdp_rdp *self;

    self = (struct rdp_rdp *)g_malloc(sizeof(struct rdp_rdp), 1);
    self->mod = owner;
    self->sec_layer = rdp_sec_create(self);
    self->bitmap_compression = 1;
    self->bitmap_cache = 1;
    self->desktop_save = 0;
    self->orders = rdp_orders_create(self);
    self->rec_mode = 0;
    return self;
}

/*****************************************************************************/
void APP_CC
rdp_rdp_delete(struct rdp_rdp *self)
{
    if (self == 0)
    {
        return;
    }

    rdp_orders_delete(self->orders);
    rdp_sec_delete(self->sec_layer);

    if (self->rec_fd != 0)
    {
        g_file_close(self->rec_fd);
        self->rec_fd = 0;
    }

    g_free(self);
}

/******************************************************************************/
/* Initialise an RDP packet */
int APP_CC
rdp_rdp_init(struct rdp_rdp *self, struct stream *s)
{
    if (rdp_sec_init(self->sec_layer, s, SEC_ENCRYPT) != 0)
    {
        return 1;
    }

    s_push_layer(s, rdp_hdr, 6);
    return 0;
}

/******************************************************************************/
/* Send an RDP packet */
int APP_CC
rdp_rdp_send(struct rdp_rdp *self, struct stream *s, int pdu_type)
{
    int len;
    int sec_flags;

    s_pop_layer(s, rdp_hdr);
    len = s->end - s->p;
    out_uint16_le(s, len);
    out_uint16_le(s, pdu_type | 0x10);
    out_uint16_le(s, self->sec_layer->mcs_layer->userid);
    sec_flags = SEC_ENCRYPT;

    if (rdp_sec_send(self->sec_layer, s, sec_flags) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
/* Initialise an RDP data packet */
int APP_CC
rdp_rdp_init_data(struct rdp_rdp *self, struct stream *s)
{
    if (rdp_sec_init(self->sec_layer, s, SEC_ENCRYPT) != 0)
    {
        return 1;
    }

    s_push_layer(s, rdp_hdr, 18);
    return 0;
}

/******************************************************************************/
/* Send an RDP data packet */
int APP_CC
rdp_rdp_send_data(struct rdp_rdp *self, struct stream *s, int pdu_data_type)
{
    int len;
    int sec_flags;

    s_pop_layer(s, rdp_hdr);
    len = s->end - s->p;
    out_uint16_le(s, len);
    out_uint16_le(s, RDP_PDU_DATA | 0x10);
    out_uint16_le(s, self->sec_layer->mcs_layer->userid);
    out_uint32_le(s, self->share_id);
    out_uint8(s, 0);
    out_uint8(s, 1);
    out_uint16_le(s, len - 14);
    out_uint8(s, pdu_data_type);
    out_uint8(s, 0); /* compress type */
    out_uint16_le(s, 0); /* compress len */
    sec_flags = SEC_ENCRYPT;

    if (rdp_sec_send(self->sec_layer, s, sec_flags) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
/* Output general capability set */
static int APP_CC
rdp_rdp_out_general_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_GENERAL);
    out_uint16_le(s, RDP_CAPLEN_GENERAL);
    out_uint16_le(s, 1); /* OS major type */
    out_uint16_le(s, 3); /* OS minor type */
    out_uint16_le(s, 0x200); /* Protocol version */
    out_uint16_le(s, 0); /* Pad */
    out_uint16_le(s, 0); /* Compression types */
    out_uint16_le(s, self->use_rdp5 ? 0x40d : 0);
    out_uint16_le(s, 0); /* Update capability */
    out_uint16_le(s, 0); /* Remote unshare capability */
    out_uint16_le(s, 0); /* Compression level */
    out_uint16_le(s, 0); /* Pad */
    return 0;
}

/******************************************************************************/
/* Output bitmap capability set */
static int APP_CC
rdp_rdp_out_bitmap_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_BITMAP);
    out_uint16_le(s, RDP_CAPLEN_BITMAP);
    out_uint16_le(s, self->mod->rdp_bpp); /* Preferred BPP */
    out_uint16_le(s, 1); /* Receive 1 BPP */
    out_uint16_le(s, 1); /* Receive 4 BPP */
    out_uint16_le(s, 1); /* Receive 8 BPP */
    out_uint16_le(s, 800); /* Desktop width */
    out_uint16_le(s, 600); /* Desktop height */
    out_uint16_le(s, 0); /* Pad */
    out_uint16_le(s, 1); /* Allow resize */
    out_uint16_le(s, self->bitmap_compression); /* Support compression */
    out_uint16_le(s, 0); /* Unknown */
    out_uint16_le(s, 1); /* Unknown */
    out_uint16_le(s, 0); /* Pad */
    return 0;
}

/******************************************************************************/
/* Output order capability set */
static int APP_CC
rdp_rdp_out_order_caps(struct rdp_rdp *self, struct stream *s)
{
    char order_caps[32];

    g_memset(order_caps, 0, 32);
    order_caps[0] = 1; /* dest blt */
    order_caps[1] = 1; /* pat blt */
    order_caps[2] = 1; /* screen blt */
    order_caps[3] = self->bitmap_cache; /* memblt */
    order_caps[4] = 0; /* triblt */
    order_caps[8] = 1; /* line */
    order_caps[9] = 1; /* line */
    order_caps[10] = 1; /* rect */
    order_caps[11] = self->desktop_save; /* desksave */
    order_caps[13] = 1; /* memblt another above */
    order_caps[14] = 1; /* triblt another above */
    order_caps[20] = self->polygon_ellipse_orders; /* polygon */
    order_caps[21] = self->polygon_ellipse_orders; /* polygon2 */
    order_caps[22] = 0; /* todo polyline */
    order_caps[25] = self->polygon_ellipse_orders; /* ellipse */
    order_caps[26] = self->polygon_ellipse_orders; /* ellipse2 */
    order_caps[27] = 1; /* text2 */
    out_uint16_le(s, RDP_CAPSET_ORDER);
    out_uint16_le(s, RDP_CAPLEN_ORDER);
    out_uint8s(s, 20); /* Terminal desc, pad */
    out_uint16_le(s, 1); /* Cache X granularity */
    out_uint16_le(s, 20); /* Cache Y granularity */
    out_uint16_le(s, 0); /* Pad */
    out_uint16_le(s, 1); /* Max order level */
    out_uint16_le(s, 0x147); /* Number of fonts */
    out_uint16_le(s, 0x2a); /* Capability flags */
    out_uint8p(s, order_caps, 32); /* Orders supported */
    out_uint16_le(s, 0x6a1); /* Text capability flags */
    out_uint8s(s, 6); /* Pad */
    out_uint32_le(s, self->desktop_save * 0x38400); /* Desktop cache size */
    out_uint32_le(s, 0); /* Unknown */
    out_uint32_le(s, 0x4e4); /* Unknown */
    return 0;
}

/******************************************************************************/
/* Output bitmap cache capability set */
static int APP_CC
rdp_rdp_out_bmpcache_caps(struct rdp_rdp *self, struct stream *s)
{
    int Bpp = 0;

    out_uint16_le(s, RDP_CAPSET_BMPCACHE);
    out_uint16_le(s, RDP_CAPLEN_BMPCACHE);
    Bpp = (self->mod->rdp_bpp + 7) / 8;
    out_uint8s(s, 24); /* unused */
    out_uint16_le(s, 0x258); /* entries */
    out_uint16_le(s, 0x100 * Bpp); /* max cell size */
    out_uint16_le(s, 0x12c); /* entries */
    out_uint16_le(s, 0x400 * Bpp); /* max cell size */
    out_uint16_le(s, 0x106); /* entries */
    out_uint16_le(s, 0x1000 * Bpp); /* max cell size */
    return 0;
}

/******************************************************************************/
/* Output control capability set */
static int APP_CC
rdp_rdp_out_control_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_CONTROL);
    out_uint16_le(s, RDP_CAPLEN_CONTROL);
    out_uint16_le(s, 0); /* Control capabilities */
    out_uint16_le(s, 0); /* Remote detach */
    out_uint16_le(s, 2); /* Control interest */
    out_uint16_le(s, 2); /* Detach interest */
    return 0;
}

/******************************************************************************/
/* Output activation capability set */
static int APP_CC
rdp_rdp_out_activate_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_ACTIVATE);
    out_uint16_le(s, RDP_CAPLEN_ACTIVATE);
    out_uint16_le(s, 0); /* Help key */
    out_uint16_le(s, 0); /* Help index key */
    out_uint16_le(s, 0); /* Extended help key */
    out_uint16_le(s, 0); /* Window activate */
    return 0;
}

/******************************************************************************/
/* Output pointer capability set */
static int APP_CC
rdp_rdp_out_pointer_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_POINTER);
    out_uint16_le(s, RDP_CAPLEN_POINTER_MONO);
    out_uint16_le(s, 0); /* Color pointer */
    out_uint16_le(s, 20); /* Cache size */
    return 0;
}

/******************************************************************************/
/* Output share capability set */
static int APP_CC
rdp_rdp_out_share_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_SHARE);
    out_uint16_le(s, RDP_CAPLEN_SHARE);
    out_uint16_le(s, 0); /* userid */
    out_uint16_le(s, 0); /* pad */
    return 0;
}

/******************************************************************************/
/* Output color cache capability set */
static int APP_CC
rdp_rdp_out_colcache_caps(struct rdp_rdp *self, struct stream *s)
{
    out_uint16_le(s, RDP_CAPSET_COLCACHE);
    out_uint16_le(s, RDP_CAPLEN_COLCACHE);
    out_uint16_le(s, 6); /* cache size */
    out_uint16_le(s, 0); /* pad */
    return 0;
}

static char caps_0x0d[] =
{
    0x01, 0x00, 0x00, 0x00, 0x09, 0x04, 0x00, 0x00,
    0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00
};

static char caps_0x0c[] = { 0x01, 0x00, 0x00, 0x00 };

static char caps_0x0e[] = { 0x01, 0x00, 0x00, 0x00 };

static char caps_0x10[] =
{
    0xFE, 0x00, 0x04, 0x00, 0xFE, 0x00, 0x04, 0x00,
    0xFE, 0x00, 0x08, 0x00, 0xFE, 0x00, 0x08, 0x00,
    0xFE, 0x00, 0x10, 0x00, 0xFE, 0x00, 0x20, 0x00,
    0xFE, 0x00, 0x40, 0x00, 0xFE, 0x00, 0x80, 0x00,
    0xFE, 0x00, 0x00, 0x01, 0x40, 0x00, 0x00, 0x08,
    0x00, 0x01, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00
};

/******************************************************************************/
/* Output unknown capability sets */
static int APP_CC
rdp_rdp_out_unknown_caps(struct rdp_rdp *self, struct stream *s, int id,
                         int length, char *caps)
{
    out_uint16_le(s, id);
    out_uint16_le(s, length);
    out_uint8p(s, caps, length - 4);
    return 0;
}

#define RDP5_FLAG 0x0030

/******************************************************************************/
/* Send a confirm active PDU */
static int APP_CC
rdp_rdp_send_confirm_active(struct rdp_rdp *self, struct stream *s)
{
    int sec_flags;
    int caplen;

    sec_flags = SEC_ENCRYPT;
    //sec_flags = RDP5_FLAG | SEC_ENCRYPT;
    caplen = RDP_CAPLEN_GENERAL + RDP_CAPLEN_BITMAP + RDP_CAPLEN_ORDER +
             RDP_CAPLEN_BMPCACHE + RDP_CAPLEN_COLCACHE +
             RDP_CAPLEN_ACTIVATE + RDP_CAPLEN_CONTROL +
             RDP_CAPLEN_POINTER_MONO + RDP_CAPLEN_SHARE +
             0x58 + 0x08 + 0x08 + 0x34 /* unknown caps */  +
             4 /* w2k fix, why? */ ;

    if (rdp_sec_init(self->sec_layer, s, sec_flags) != 0)
    {
        return 1;
    }

    out_uint16_le(s, 2 + 14 + caplen + sizeof(RDP_SOURCE));
    out_uint16_le(s, (RDP_PDU_CONFIRM_ACTIVE | 0x10)); /* Version 1 */
    out_uint16_le(s, (self->sec_layer->mcs_layer->userid + 1001));
    out_uint32_le(s, self->share_id);
    out_uint16_le(s, 0x3ea); /* userid */
    out_uint16_le(s, sizeof(RDP_SOURCE));
    out_uint16_le(s, caplen);
    out_uint8p(s, RDP_SOURCE, sizeof(RDP_SOURCE));
    out_uint16_le(s, 0xd); /* num_caps */
    out_uint8s(s, 2); /* pad */
    rdp_rdp_out_general_caps(self, s);
    rdp_rdp_out_bitmap_caps(self, s);
    rdp_rdp_out_order_caps(self, s);
    rdp_rdp_out_bmpcache_caps(self, s);
    rdp_rdp_out_colcache_caps(self, s);
    rdp_rdp_out_activate_caps(self, s);
    rdp_rdp_out_control_caps(self, s);
    rdp_rdp_out_pointer_caps(self, s);
    rdp_rdp_out_share_caps(self, s);
    rdp_rdp_out_unknown_caps(self, s, 0x0d, 0x58, caps_0x0d); /* international? */
    rdp_rdp_out_unknown_caps(self, s, 0x0c, 0x08, caps_0x0c);
    rdp_rdp_out_unknown_caps(self, s, 0x0e, 0x08, caps_0x0e);
    rdp_rdp_out_unknown_caps(self, s, 0x10, 0x34, caps_0x10); /* glyph cache? */
    s_mark_end(s);

    if (rdp_sec_send(self->sec_layer, s, sec_flags) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
/* Process a color pointer PDU */
static int APP_CC
rdp_rdp_process_color_pointer_pdu(struct rdp_rdp *self, struct stream *s)
{
    int cache_idx;
    int dlen;
    int mlen;
    struct rdp_cursor *cursor;

    in_uint16_le(s, cache_idx);

    if (cache_idx >= sizeof(self->cursors) / sizeof(cursor))
    {
        return 1;
    }

    cursor = self->cursors + cache_idx;
    in_uint16_le(s, cursor->x);
    in_uint16_le(s, cursor->y);
    in_uint16_le(s, cursor->width);
    in_uint16_le(s, cursor->height);
    in_uint16_le(s, mlen); /* mask length */
    in_uint16_le(s, dlen); /* data length */

    if ((mlen > sizeof(cursor->mask)) || (dlen > sizeof(cursor->data)))
    {
        return 1;
    }

    in_uint8a(s, cursor->data, dlen);
    in_uint8a(s, cursor->mask, mlen);
    self->mod->server_set_cursor(self->mod, cursor->x, cursor->y,
                                 cursor->data, cursor->mask);
    return 0;
}

/******************************************************************************/
/* Process a cached pointer PDU */
static int APP_CC
rdp_rdp_process_cached_pointer_pdu(struct rdp_rdp *self, struct stream *s)
{
    int cache_idx;
    struct rdp_cursor *cursor;

    in_uint16_le(s, cache_idx);

    if (cache_idx >= sizeof(self->cursors) / sizeof(cursor))
    {
        return 1;
    }

    cursor = self->cursors + cache_idx;
    self->mod->server_set_cursor(self->mod, cursor->x, cursor->y,
                                 cursor->data, cursor->mask);
    return 0;
}

/******************************************************************************/
/* Process a system pointer PDU */
static int APP_CC
rdp_rdp_process_system_pointer_pdu(struct rdp_rdp *self, struct stream *s)
{
    int system_pointer_type;
    struct rdp_cursor *cursor;

    in_uint16_le(s, system_pointer_type);

    switch (system_pointer_type)
    {
        case RDP_NULL_POINTER:
            cursor = (struct rdp_cursor *)g_malloc(sizeof(struct rdp_cursor), 1);
            g_memset(cursor->mask, 0xff, sizeof(cursor->mask));
            self->mod->server_set_cursor(self->mod, cursor->x, cursor->y,
                                         cursor->data, cursor->mask);
            g_free(cursor);
            break;
        default:
            break;
    }

    return 0;
}

/******************************************************************************/
/* Process a pointer PDU */
static int APP_CC
rdp_rdp_process_pointer_pdu(struct rdp_rdp *self, struct stream *s)
{
    int message_type;
    int x;
    int y;
    int rv;

    rv = 0;
    in_uint16_le(s, message_type);
    in_uint8s(s, 2); /* pad */

    switch (message_type)
    {
        case RDP_POINTER_MOVE:
            in_uint16_le(s, x);
            in_uint16_le(s, y);
            break;
        case RDP_POINTER_COLOR:
            rv = rdp_rdp_process_color_pointer_pdu(self, s);
            break;
        case RDP_POINTER_CACHED:
            rv = rdp_rdp_process_cached_pointer_pdu(self, s);
            break;
        case RDP_POINTER_SYSTEM:
            rv = rdp_rdp_process_system_pointer_pdu(self, s);
            break;
        default:
            break;
    }

    return rv;
}

/******************************************************************************/
/* Process bitmap updates */
static void APP_CC
rdp_rdp_process_bitmap_updates(struct rdp_rdp *self, struct stream *s)
{
    int num_updates = 0;
    int left = 0;
    int top = 0;
    int right = 0;
    int bottom = 0;
    int width = 0;
    int height = 0;
    int cx = 0;
    int cy = 0;
    int bpp = 0;
    int Bpp = 0;
    int compress = 0;
    int bufsize = 0;
    int size = 0;
    int i = 0;
    int x = 0;
    int y = 0;
    char *data = NULL;
    char *bmpdata0 = NULL;
    char *bmpdata1 = NULL;

    in_uint16_le(s, num_updates);

    for (i = 0; i < num_updates; i++)
    {
        in_uint16_le(s, left);
        in_uint16_le(s, top);
        in_uint16_le(s, right);
        in_uint16_le(s, bottom);
        in_uint16_le(s, width);
        in_uint16_le(s, height);
        in_uint16_le(s, bpp);
        Bpp = (bpp + 7) / 8;
        in_uint16_le(s, compress);
        in_uint16_le(s, bufsize);
        cx = (right - left) + 1;
        cy = (bottom - top) + 1;
        bmpdata0 = (char *)g_malloc(width * height * Bpp, 0);

        if (compress)
        {
            if (compress & 0x400)
            {
                size = bufsize;
            }
            else
            {
                in_uint8s(s, 2); /* pad */
                in_uint16_le(s, size);
                in_uint8s(s, 4); /* line_size, final_size */
            }

            in_uint8p(s, data, size);
            rdp_bitmap_decompress(bmpdata0, width, height, data, size, Bpp);
            bmpdata1 = rdp_orders_convert_bitmap(bpp, self->mod->xrdp_bpp,
                                                 bmpdata0, width, height,
                                                 self->colormap.colors);
            self->mod->server_paint_rect(self->mod, left, top, cx, cy, bmpdata1,
                                         width, height, 0, 0);
        }
        else /* not compressed */
        {
            for (y = 0; y < height; y++)
            {
                data = bmpdata0 + ((height - y) - 1) * (width * Bpp);

                if (Bpp == 1)
                {
                    for (x = 0; x < width; x++)
                    {
                        in_uint8(s, data[x]);
                    }
                }
                else if (Bpp == 2)
                {
                    for (x = 0; x < width; x++)
                    {
                        in_uint16_le(s, ((tui16 *)data)[x]);
                    }
                }
                else if (Bpp == 3)
                {
                    for (x = 0; x < width; x++)
                    {
                        in_uint8(s, data[x * 3 + 0]);
                        in_uint8(s, data[x * 3 + 1]);
                        in_uint8(s, data[x * 3 + 2]);
                    }
                }
            }

            bmpdata1 = rdp_orders_convert_bitmap(bpp, self->mod->xrdp_bpp,
                                                 bmpdata0, width, height,
                                                 self->colormap.colors);
            self->mod->server_paint_rect(self->mod, left, top, cx, cy, bmpdata1,
                                         width, height, 0, 0);
        }

        if (bmpdata0 != bmpdata1)
        {
            g_free(bmpdata1);
        }

        g_free(bmpdata0);
    }
}

/******************************************************************************/
/* Process a palette update */
static void APP_CC
rdp_rdp_process_palette(struct rdp_rdp *self, struct stream *s)
{
    int i;
    int r;
    int g;
    int b;

    in_uint8s(s, 2); /* pad */
    in_uint16_le(s, self->colormap.ncolors);
    in_uint8s(s, 2); /* pad */

    for (i = 0; i < self->colormap.ncolors; i++)
    {
        in_uint8(s, r);
        in_uint8(s, g);
        in_uint8(s, b);
        self->colormap.colors[i] = (r << 16) | (g << 8) | b;
    }

    //ui_set_colormap(hmap);
}

/******************************************************************************/
/* Process an update PDU */
static int APP_CC
rdp_rdp_process_update_pdu(struct rdp_rdp *self, struct stream *s)
{
    int update_type;
    int count;

    in_uint16_le(s, update_type);
    self->mod->server_begin_update(self->mod);

    switch (update_type)
    {
        case RDP_UPDATE_ORDERS:
            in_uint8s(s, 2); /* pad */
            in_uint16_le(s, count);
            in_uint8s(s, 2); /* pad */
            rdp_orders_process_orders(self->orders, s, count);
            break;
        case RDP_UPDATE_BITMAP:
            rdp_rdp_process_bitmap_updates(self, s);
            break;
        case RDP_UPDATE_PALETTE:
            rdp_rdp_process_palette(self, s);
            break;
        case RDP_UPDATE_SYNCHRONIZE:
            break;
        default:
            break;
    }

    self->mod->server_end_update(self->mod);
    return 0;
}


/******************************************************************************/
void APP_CC
rdp_rdp_out_unistr(struct stream *s, char *text)
{
    int i;

    i = 0;

    while (text[i] != 0)
    {
        out_uint8(s, text[i]);
        out_uint8(s, 0);
        i++;
    }

    out_uint8(s, 0);
    out_uint8(s, 0);
}

/******************************************************************************/
int APP_CC
rdp_rdp_send_login_info(struct rdp_rdp *self, int flags)
{
    int len_domain;
    int len_username;
    int len_password;
    int len_program;
    int len_directory;
    int sec_flags;
    struct stream *s;

    DEBUG(("in rdp_rdp_send_login_info"));
    make_stream(s);
    init_stream(s, 8192);
    len_domain = 2 * g_strlen(self->mod->domain);
    len_username = 2 * g_strlen(self->mod->username);
    len_password = 2 * g_strlen(self->mod->password);
    len_program = 2 * g_strlen(self->mod->program);
    len_directory = 2 * g_strlen(self->mod->directory);
    sec_flags = SEC_LOGON_INFO | SEC_ENCRYPT;

    if (rdp_sec_init(self->sec_layer, s, sec_flags) != 0)
    {
        free_stream(s);
        DEBUG(("out rdp_rdp_send_login_info error 1"));
        return 1;
    }

    out_uint32_le(s, 0);
    out_uint32_le(s, flags);
    out_uint16_le(s, len_domain);
    out_uint16_le(s, len_username);
    out_uint16_le(s, len_password);
    out_uint16_le(s, len_program);
    out_uint16_le(s, len_directory);
    rdp_rdp_out_unistr(s, self->mod->domain);
    rdp_rdp_out_unistr(s, self->mod->username);
    rdp_rdp_out_unistr(s, self->mod->password);
    rdp_rdp_out_unistr(s, self->mod->program);
    rdp_rdp_out_unistr(s, self->mod->directory);
    s_mark_end(s);

    if (rdp_sec_send(self->sec_layer, s, sec_flags) != 0)
    {
        free_stream(s);
        DEBUG(("out rdp_rdp_send_login_info error 2"));
        return 1;
    }

    free_stream(s);
    DEBUG(("out rdp_rdp_send_login_info"));
    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rdp_connect(struct rdp_rdp *self, char *ip, char *port)
{
    int flags;

    DEBUG(("in rdp_rdp_connect"));
    flags = RDP_LOGON_NORMAL;

    if (g_strlen(self->mod->password) > 0)
    {
        flags |= RDP_LOGON_AUTO;
    }

    if (rdp_sec_connect(self->sec_layer, ip, port) != 0)
    {
        DEBUG(("out rdp_rdp_connect error rdp_sec_connect failed"));
        return 1;
    }

    if (rdp_rdp_send_login_info(self, flags) != 0)
    {
        DEBUG(("out rdp_rdp_connect error rdp_rdp_send_login_info failed"));
        return 1;
    }

    DEBUG(("out rdp_rdp_connect"));
    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rdp_send_input(struct rdp_rdp *self, struct stream *s,
                   int time, int message_type,
                   int device_flags, int param1, int param2)
{
    if (rdp_rdp_init_data(self, s) != 0)
    {
        return 1;
    }

    out_uint16_le(s, 1); /* number of events */
    out_uint16_le(s, 0);
    out_uint32_le(s, time);
    out_uint16_le(s, message_type);
    out_uint16_le(s, device_flags);
    out_uint16_le(s, param1);
    out_uint16_le(s, param2);
    s_mark_end(s);

    if (rdp_rdp_send_data(self, s, RDP_DATA_PDU_INPUT) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rdp_send_invalidate(struct rdp_rdp *self, struct stream *s,
                        int left, int top, int width, int height)
{
    if (rdp_rdp_init_data(self, s) != 0)
    {
        return 1;
    }

    out_uint32_le(s, 1);
    out_uint16_le(s, left);
    out_uint16_le(s, top);
    out_uint16_le(s, (left + width) - 1);
    out_uint16_le(s, (top + height) - 1);
    s_mark_end(s);

    if (rdp_rdp_send_data(self, s, 33) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rdp_recv(struct rdp_rdp *self, struct stream *s, int *type)
{
    int len;
    int pdu_type;
    int chan;

    chan = 0;
    DEBUG(("in rdp_rdp_recv"));

    if (s->next_packet >= s->end || s->next_packet == 0)
    {
        if (rdp_sec_recv(self->sec_layer, s, &chan) != 0)
        {
            DEBUG(("error in rdp_rdp_recv, rdp_sec_recv failed"));
            return 1;
        }

        s->next_packet = s->p;
    }
    else
    {
        chan = MCS_GLOBAL_CHANNEL;
        s->p = s->next_packet;
    }

    if (chan == MCS_GLOBAL_CHANNEL)
    {
        in_uint16_le(s, len);
        DEBUG(("rdp_rdp_recv got %d len", len));

        if (len == 0x8000)
        {
            s->next_packet += 8;
            DEBUG(("out rdp_rdp_recv"));
            return 0;
        }

        in_uint16_le(s, pdu_type);
        in_uint8s(s, 2);
        *type = pdu_type & 0xf;
        s->next_packet += len;
    }
    else
    {
        /* todo, process channel data */
        DEBUG(("got channel data channel %d", chan));
        s->next_packet = s->end;
    }

    DEBUG(("out rdp_rdp_recv"));
    return 0;
}


/******************************************************************************/
static int APP_CC
rdp_rdp_process_disconnect_pdu(struct rdp_rdp *self, struct stream *s)
{
    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rdp_process_data_pdu(struct rdp_rdp *self, struct stream *s)
{
    int data_pdu_type;
    int ctype;
    int len;
    int rv;

    rv = 0;
    in_uint8s(s, 6); /* shareid, pad, streamid */
    in_uint16_le(s, len);
    in_uint8(s, data_pdu_type);
    in_uint8(s, ctype);
    in_uint8s(s, 2); /* clen */

    switch (data_pdu_type)
    {
        case RDP_DATA_PDU_UPDATE:
            rv = rdp_rdp_process_update_pdu(self, s);
            break;
        case RDP_DATA_PDU_CONTROL:
            break;
        case RDP_DATA_PDU_SYNCHRONISE:
            break;
        case RDP_DATA_PDU_POINTER:
            rv = rdp_rdp_process_pointer_pdu(self, s);
            break;
        case RDP_DATA_PDU_PLAY_SOUND:
            break;
        case RDP_DATA_PDU_LOGON:
            break;
        case RDP_DATA_PDU_DISCONNECT:
            rv = rdp_rdp_process_disconnect_pdu(self, s);
            break;
        default:
            break;
    }

    return rv;
}

/******************************************************************************/
/* Process a bitmap capability set */
static void APP_CC
rdp_rdp_process_general_caps(struct rdp_rdp *self, struct stream *s)
{
}

/******************************************************************************/
/* Process a bitmap capability set */
static void APP_CC
rdp_rdp_process_bitmap_caps(struct rdp_rdp *self, struct stream *s)
{
    int width = 0;
    int height = 0;
    int bpp = 0;

    in_uint16_le(s, bpp);
    in_uint8s(s, 6);
    in_uint16_le(s, width);
    in_uint16_le(s, height);
    self->mod->rdp_bpp = bpp;
    /* todo, call reset if needed and use width and height */
}

/******************************************************************************/
/* Process server capabilities */
/* returns error */
static int APP_CC
rdp_rdp_process_server_caps(struct rdp_rdp *self, struct stream *s, int len)
{
    int n = 0;
    int ncapsets = 0;
    int capset_type = 0;
    int capset_length = 0;
    char *next = NULL;
    char *start = NULL;

    start = s->p;
    in_uint16_le(s, ncapsets);
    in_uint8s(s, 2); /* pad */

    for (n = 0; n < ncapsets; n++)
    {
        if (s->p > start + len)
        {
            return 0;
        }

        in_uint16_le(s, capset_type);
        in_uint16_le(s, capset_length);
        next = (s->p + capset_length) - 4;

        switch (capset_type)
        {
            case RDP_CAPSET_GENERAL:
                rdp_rdp_process_general_caps(self, s);
                break;
            case RDP_CAPSET_BITMAP:
                rdp_rdp_process_bitmap_caps(self, s);
                break;
            default:
                break;
        }

        s->p = next;
    }

    return 0;
}

/******************************************************************************/
/* Send a control PDU */
/* returns error */
static int APP_CC
rdp_rdp_send_control(struct rdp_rdp *self, struct stream *s, int action)
{
    if (rdp_rdp_init_data(self, s) != 0)
    {
        return 1;
    }

    out_uint16_le(s, action);
    out_uint16_le(s, 0); /* userid */
    out_uint32_le(s, 0); /* control id */
    s_mark_end(s);

    if (rdp_rdp_send_data(self, s, RDP_DATA_PDU_CONTROL) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
/* Send a synchronisation PDU */
/* returns error */
static int APP_CC
rdp_rdp_send_synchronise(struct rdp_rdp *self, struct stream *s)
{
    if (rdp_rdp_init_data(self, s) != 0)
    {
        return 1;
    }

    out_uint16_le(s, 1); /* type */
    out_uint16_le(s, 1002);
    s_mark_end(s);

    if (rdp_rdp_send_data(self, s, RDP_DATA_PDU_SYNCHRONISE) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
/* Send an (empty) font information PDU */
static int APP_CC
rdp_rdp_send_fonts(struct rdp_rdp *self, struct stream *s, int seq)
{
    if (rdp_rdp_init_data(self, s) != 0)
    {
        return 1;
    }

    out_uint16_le(s, 0); /* number of fonts */
    out_uint16_le(s, 0); /* pad? */
    out_uint16_le(s, seq); /* unknown */
    out_uint16_le(s, 0x32); /* entry size */
    s_mark_end(s);

    if (rdp_rdp_send_data(self, s, RDP_DATA_PDU_FONT2) != 0)
    {
        return 1;
    }

    return 0;
}

/******************************************************************************/
/* Respond to a demand active PDU */
int APP_CC
rdp_rdp_process_demand_active(struct rdp_rdp *self, struct stream *s)
{
    int type = 0;
    int len_src_descriptor = 0;
    int len_combined_caps = 0;

    in_uint32_le(s, self->share_id);
    in_uint16_le(s, len_src_descriptor);
    in_uint16_le(s, len_combined_caps);
    in_uint8s(s, len_src_descriptor);
    rdp_rdp_process_server_caps(self, s, len_combined_caps);
    rdp_rdp_send_confirm_active(self, s);
    rdp_rdp_send_synchronise(self, s);
    rdp_rdp_send_control(self, s, RDP_CTL_COOPERATE);
    rdp_rdp_send_control(self, s, RDP_CTL_REQUEST_CONTROL);
    rdp_rdp_recv(self, s, &type); /* RDP_PDU_SYNCHRONIZE */
    rdp_rdp_recv(self, s, &type); /* RDP_CTL_COOPERATE */
    rdp_rdp_recv(self, s, &type); /* RDP_CTL_GRANT_CONTROL */
    rdp_rdp_send_input(self, s, 0, RDP_INPUT_SYNCHRONIZE, 0, 0, 0);
    rdp_rdp_send_fonts(self, s, 1);
    rdp_rdp_send_fonts(self, s, 2);
    rdp_rdp_recv(self, s, &type); /* RDP_PDU_UNKNOWN 0x28 (Fonts?) */
    rdp_orders_reset_state(self->orders);
    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rec_check_file(struct rdp_rdp *self)
{
    char file_name[256];
    int index = 0;
    int len = 0;
    struct stream *s = (struct stream *)NULL;

    g_memset(file_name, 0, sizeof(char) * 256);

    if (self->rec_fd == 0)
    {
        index = 1;
        g_sprintf(file_name, "rec%8.8d.rec", index);

        while (g_file_exist(file_name))
        {
            index++;

            if (index >= 9999)
            {
                return 1;
            }

            g_sprintf(file_name, "rec%8.8d.rec", index);
        }

        self->rec_fd = g_file_open(file_name);
        make_stream(s);
        init_stream(s, 8192);
        out_uint8a(s, "XRDPREC1", 8);
        out_uint8s(s, 8);
        s_mark_end(s);
        len = s->end - s->data;
        g_file_write(self->rec_fd, s->data, len);
        free_stream(s);
    }

    return 0;
}

/******************************************************************************/
int APP_CC
rdp_rec_write_item(struct rdp_rdp *self, struct stream *s)
{
    int len = 0;
    int time = 0;

    if (self->rec_fd == 0)
    {
        return 1;
    }

    time = g_time1();
    out_uint32_le(s, time);
    s_mark_end(s);
    len = s->end - s->data;
    s_pop_layer(s, iso_hdr);
    out_uint32_le(s, len);
    g_file_write(self->rec_fd, s->data, len);
    return 0;
}