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xrdp/libxrdp/libxrdp.c

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/*
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.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2004-2008
this is the interface to libxrdp
*/
#include "libxrdp.h"
/******************************************************************************/
struct xrdp_session* EXPORT_CC
libxrdp_init(long id, int sck)
{
struct xrdp_session* session;
session = (struct xrdp_session*)g_malloc(sizeof(struct xrdp_session), 1);
session->id = id;
session->rdp = xrdp_rdp_create(session, sck);
session->orders = xrdp_orders_create(session, (struct xrdp_rdp*)session->rdp);
session->client_info = &(((struct xrdp_rdp*)session->rdp)->client_info);
make_stream(session->s);
init_stream(session->s, 8192 * 2);
return session;
}
/******************************************************************************/
int EXPORT_CC
libxrdp_exit(struct xrdp_session* session)
{
if (session == 0)
{
return 0;
}
xrdp_orders_delete((struct xrdp_orders*)session->orders);
xrdp_rdp_delete((struct xrdp_rdp*)session->rdp);
free_stream(session->s);
g_free(session);
return 0;
}
/******************************************************************************/
int EXPORT_CC
libxrdp_disconnect(struct xrdp_session* session)
{
return xrdp_rdp_disconnect((struct xrdp_rdp*)session->rdp);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_process_incomming(struct xrdp_session* session)
{
return xrdp_rdp_incoming((struct xrdp_rdp*)session->rdp);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_process_data(struct xrdp_session* session)
{
int cont;
int rv;
int code;
int term;
term = 0;
cont = 1;
rv = 0;
while ((cont || !session->up_and_running) && !term)
{
if (session->is_term != 0)
{
if (session->is_term())
{
term = 1;
}
}
code = 0;
if (xrdp_rdp_recv((struct xrdp_rdp*)session->rdp, session->s, &code) != 0)
{
rv = 1;
break;
}
DEBUG(("libxrdp_process_data code %d", code));
switch (code)
{
case -1:
xrdp_rdp_send_demand_active((struct xrdp_rdp*)session->rdp);
session->up_and_running = 0;
break;
case 0:
break;
case RDP_PDU_CONFIRM_ACTIVE: /* 3 */
xrdp_rdp_process_confirm_active((struct xrdp_rdp*)session->rdp,
session->s);
break;
case RDP_PDU_DATA: /* 7 */
if (xrdp_rdp_process_data((struct xrdp_rdp*)session->rdp,
session->s) != 0)
{
DEBUG(("libxrdp_process_data returned non zero"));
cont = 0;
term = 1;
}
break;
default:
g_writeln("unknown in libxrdp_process_data");
break;
}
if (cont)
{
cont = (session->s->next_packet != 0) &&
(session->s->next_packet < session->s->end);
}
}
return rv;
}
/******************************************************************************/
int EXPORT_CC
libxrdp_send_palette(struct xrdp_session* session, int* palette)
{
int i;
int color;
struct stream* s;
if (session->client_info->bpp > 8)
{
return 0;
}
DEBUG(("libxrdp_send_palette sending palette"));
/* clear orders */
libxrdp_orders_force_send(session);
make_stream(s);
init_stream(s, 8192);
xrdp_rdp_init_data((struct xrdp_rdp*)session->rdp, s);
out_uint16_le(s, RDP_UPDATE_PALETTE);
out_uint16_le(s, 0);
out_uint16_le(s, 256); /* # of colors */
out_uint16_le(s, 0);
for (i = 0; i < 256; i++)
{
color = palette[i];
out_uint8(s, color >> 16);
out_uint8(s, color >> 8);
out_uint8(s, color);
}
s_mark_end(s);
xrdp_rdp_send_data((struct xrdp_rdp*)session->rdp, s, RDP_DATA_PDU_UPDATE);
free_stream(s);
/* send the orders palette too */
libxrdp_orders_init(session);
libxrdp_orders_send_palette(session, palette, 0);
libxrdp_orders_send(session);
return 0;
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_send_bitmap(struct xrdp_session* session, int width, int height,
int bpp, char* data, int x, int y, int cx, int cy)
{
int data_size;
int line_size;
int i;
int j;
int total_lines;
int lines_sending;
int Bpp;
int e;
int bufsize;
int total_bufsize;
int num_updates;
char* p_num_updates;
char* p;
char* q;
struct stream* s;
struct stream* temp_s;
DEBUG(("libxrdp_send_bitmap sending bitmap"));
Bpp = (bpp + 7) / 8;
e = width % 4;
if (e != 0)
{
e = 4 - e;
}
line_size = width * Bpp;
make_stream(s);
init_stream(s, 8192);
if (session->client_info->use_bitmap_comp)
{
make_stream(temp_s);
init_stream(temp_s, 65536);
i = 0;
if (cy <= height)
{
i = cy;
}
while (i > 0)
{
total_bufsize = 0;
num_updates = 0;
xrdp_rdp_init_data((struct xrdp_rdp*)session->rdp, s);
out_uint16_le(s, RDP_UPDATE_BITMAP);
p_num_updates = s->p;
out_uint8s(s, 2); /* num_updates set later */
do
{
if (session->client_info->op1)
{
s_push_layer(s, channel_hdr, 18);
}
else
{
s_push_layer(s, channel_hdr, 26);
}
p = s->p;
lines_sending = xrdp_bitmap_compress(data, width, height,
s, bpp,
4096 - total_bufsize,
i - 1, temp_s, e);
if (lines_sending == 0)
{
break;
}
num_updates++;
bufsize = s->p - p;
total_bufsize += bufsize;
i = i - lines_sending;
s_mark_end(s);
s_pop_layer(s, channel_hdr);
out_uint16_le(s, x); /* left */
out_uint16_le(s, y + i); /* top */
out_uint16_le(s, (x + cx) - 1); /* right */
out_uint16_le(s, (y + i + lines_sending) - 1); /* bottom */
out_uint16_le(s, width + e); /* width */
out_uint16_le(s, lines_sending); /* height */
out_uint16_le(s, bpp); /* bpp */
if (session->client_info->op1)
{
out_uint16_le(s, 0x401); /* compress */
out_uint16_le(s, bufsize); /* compressed size */
j = (width + e) * Bpp;
j = j * lines_sending;
}
else
{
out_uint16_le(s, 0x1); /* compress */
out_uint16_le(s, bufsize + 8);
out_uint8s(s, 2); /* pad */
out_uint16_le(s, bufsize); /* compressed size */
j = (width + e) * Bpp;
out_uint16_le(s, j); /* line size */
j = j * lines_sending;
out_uint16_le(s, j); /* final size */
}
if (j > 32768)
{
g_writeln("error, decompressed size too big, its %d", j);
}
if (bufsize > 8192)
{
g_writeln("error, compressed size too big, its %d", bufsize);
}
s->p = s->end;
} while (total_bufsize < 4096 && i > 0);
p_num_updates[0] = num_updates;
p_num_updates[1] = num_updates >> 8;
xrdp_rdp_send_data((struct xrdp_rdp*)session->rdp, s,
RDP_DATA_PDU_UPDATE);
if (total_bufsize > 8192)
{
g_writeln("error, total compressed size too big, its %d",
total_bufsize);
}
}
free_stream(temp_s);
}
else
{
lines_sending = 0;
data_size = width * height * Bpp;
total_lines = height;
i = 0;
p = data;
if (line_size > 0 && total_lines > 0)
{
while (i < total_lines)
{
lines_sending = 4096 / (line_size + e * Bpp);
if (i + lines_sending > total_lines)
{
lines_sending = total_lines - i;
}
p = p + line_size * lines_sending;
xrdp_rdp_init_data((struct xrdp_rdp*)session->rdp, s);
out_uint16_le(s, RDP_UPDATE_BITMAP);
out_uint16_le(s, 1); /* num updates */
out_uint16_le(s, x);
out_uint16_le(s, y + i);
out_uint16_le(s, (x + cx) - 1);
out_uint16_le(s, (y + i + lines_sending) - 1);
out_uint16_le(s, width + e);
out_uint16_le(s, lines_sending);
out_uint16_le(s, bpp); /* bpp */
out_uint16_le(s, 0); /* compress */
out_uint16_le(s, (line_size + e * Bpp) * lines_sending); /* bufsize */
q = p;
for (j = 0; j < lines_sending; j++)
{
q = q - line_size;
out_uint8a(s, q, line_size) /* B_ENDIAN doesn't work here, todo */
out_uint8s(s, e * Bpp);
}
s_mark_end(s);
xrdp_rdp_send_data((struct xrdp_rdp*)session->rdp, s,
RDP_DATA_PDU_UPDATE);
i = i + lines_sending;
}
}
}
free_stream(s);
return 0;
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_send_pointer(struct xrdp_session* session, int cache_idx,
char* data, char* mask, int x, int y)
{
struct stream* s;
char* p;
int i;
int j;
DEBUG(("libxrdp_send_pointer sending cursor"));
make_stream(s);
init_stream(s, 8192);
xrdp_rdp_init_data((struct xrdp_rdp*)session->rdp, s);
out_uint16_le(s, RDP_POINTER_COLOR);
out_uint16_le(s, 0); /* pad */
out_uint16_le(s, cache_idx); /* cache_idx */
out_uint16_le(s, x);
out_uint16_le(s, y);
out_uint16_le(s, 32);
out_uint16_le(s, 32);
out_uint16_le(s, 128);
out_uint16_le(s, 3072);
p = data;
for (i = 0; i < 32; i++)
{
for (j = 0; j < 32; j++)
{
out_uint8(s, *p);
p++;
out_uint8(s, *p);
p++;
out_uint8(s, *p);
p++;
}
}
out_uint8a(s, mask, 128); /* mask */
s_mark_end(s);
xrdp_rdp_send_data((struct xrdp_rdp*)session->rdp, s, RDP_DATA_PDU_POINTER);
free_stream(s);
return 0;
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_set_pointer(struct xrdp_session* session, int cache_idx)
{
struct stream* s;
DEBUG(("libxrdp_set_pointer sending cursor index"));
make_stream(s);
init_stream(s, 8192);
xrdp_rdp_init_data((struct xrdp_rdp*)session->rdp, s);
out_uint16_le(s, RDP_POINTER_CACHED);
out_uint16_le(s, 0); /* pad */
out_uint16_le(s, cache_idx); /* cache_idx */
s_mark_end(s);
xrdp_rdp_send_data((struct xrdp_rdp*)session->rdp, s, RDP_DATA_PDU_POINTER);
free_stream(s);
return 0;
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_init(struct xrdp_session* session)
{
return xrdp_orders_init((struct xrdp_orders*)session->orders);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_send(struct xrdp_session* session)
{
return xrdp_orders_send((struct xrdp_orders*)session->orders);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_force_send(struct xrdp_session* session)
{
return xrdp_orders_force_send((struct xrdp_orders*)session->orders);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_rect(struct xrdp_session* session, int x, int y,
int cx, int cy, int color, struct xrdp_rect* rect)
{
return xrdp_orders_rect((struct xrdp_orders*)session->orders,
x, y, cx, cy, color, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_screen_blt(struct xrdp_session* session, int x, int y,
int cx, int cy, int srcx, int srcy,
int rop, struct xrdp_rect* rect)
{
return xrdp_orders_screen_blt((struct xrdp_orders*)session->orders,
x, y, cx, cy, srcx, srcy, rop, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_pat_blt(struct xrdp_session* session, int x, int y,
int cx, int cy, int rop, int bg_color,
int fg_color, struct xrdp_brush* brush,
struct xrdp_rect* rect)
{
return xrdp_orders_pat_blt((struct xrdp_orders*)session->orders,
x, y, cx, cy, rop, bg_color, fg_color,
brush, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_dest_blt(struct xrdp_session* session, int x, int y,
int cx, int cy, int rop,
struct xrdp_rect* rect)
{
return xrdp_orders_dest_blt((struct xrdp_orders*)session->orders,
x, y, cx, cy, rop, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_line(struct xrdp_session* session, int mix_mode,
int startx, int starty,
int endx, int endy, int rop, int bg_color,
struct xrdp_pen* pen,
struct xrdp_rect* rect)
{
return xrdp_orders_line((struct xrdp_orders*)session->orders,
mix_mode, startx, starty, endx, endy,
rop, bg_color, pen, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_mem_blt(struct xrdp_session* session, int cache_id,
int color_table, int x, int y, int cx, int cy,
int rop, int srcx, int srcy,
int cache_idx, struct xrdp_rect* rect)
{
return xrdp_orders_mem_blt((struct xrdp_orders*)session->orders,
cache_id, color_table, x, y, cx, cy, rop,
srcx, srcy, cache_idx, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_text(struct xrdp_session* session,
int font, int flags, int mixmode,
int fg_color, int bg_color,
int clip_left, int clip_top,
int clip_right, int clip_bottom,
int box_left, int box_top,
int box_right, int box_bottom,
int x, int y, char* data, int data_len,
struct xrdp_rect* rect)
{
return xrdp_orders_text((struct xrdp_orders*)session->orders,
font, flags, mixmode, fg_color, bg_color,
clip_left, clip_top, clip_right, clip_bottom,
box_left, box_top, box_right, box_bottom,
x, y, data, data_len, rect);
}
/******************************************************************************/
int EXPORT_CC
libxrdp_orders_send_palette(struct xrdp_session* session, int* palette,
int cache_id)
{
return xrdp_orders_send_palette((struct xrdp_orders*)session->orders,
palette, cache_id);
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_orders_send_raw_bitmap(struct xrdp_session* session,
int width, int height, int bpp, char* data,
int cache_id, int cache_idx)
{
return xrdp_orders_send_raw_bitmap((struct xrdp_orders*)session->orders,
width, height, bpp, data,
cache_id, cache_idx);
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_orders_send_bitmap(struct xrdp_session* session,
int width, int height, int bpp, char* data,
int cache_id, int cache_idx)
{
return xrdp_orders_send_bitmap((struct xrdp_orders*)session->orders,
width, height, bpp, data,
cache_id, cache_idx);
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_orders_send_font(struct xrdp_session* session,
struct xrdp_font_char* font_char,
int font_index, int char_index)
{
return xrdp_orders_send_font((struct xrdp_orders*)session->orders,
font_char, font_index, char_index);
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_reset(struct xrdp_session* session,
int width, int height, int bpp)
{
if (session->client_info != 0)
{
/* older client can't resize */
if (session->client_info->build <= 419)
{
return 0;
}
/* if same, don't need to do anything */
if (session->client_info->width == width &&
session->client_info->height == height &&
session->client_info->bpp == bpp)
{
return 0;
}
session->client_info->width = width;
session->client_info->height = height;
session->client_info->bpp = bpp;
}
else
{
return 1;
}
/* this will send any lingering orders */
if (xrdp_orders_reset((struct xrdp_orders*)session->orders) != 0)
{
return 1;
}
/* shut down the rdp client */
if (xrdp_rdp_send_deactive((struct xrdp_rdp*)session->rdp) != 0)
{
return 1;
}
/* this should do the resizing */
if (xrdp_rdp_send_demand_active((struct xrdp_rdp*)session->rdp) != 0)
{
return 1;
}
/* process till up and running */
session->up_and_running = 0;
libxrdp_process_data(session);
return 0;
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_orders_send_raw_bitmap2(struct xrdp_session* session,
int width, int height, int bpp, char* data,
int cache_id, int cache_idx)
{
return xrdp_orders_send_raw_bitmap2((struct xrdp_orders*)session->orders,
width, height, bpp, data,
cache_id, cache_idx);
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_orders_send_bitmap2(struct xrdp_session* session,
int width, int height, int bpp, char* data,
int cache_id, int cache_idx)
{
return xrdp_orders_send_bitmap2((struct xrdp_orders*)session->orders,
width, height, bpp, data,
cache_id, cache_idx);
}
/*****************************************************************************/
/* returns error */
/* this function gets the channel name and its flags, index is zero
based. either channel_name or channel_flags can be passed in nil if
they are not needed */
int EXPORT_CC
libxrdp_query_channel(struct xrdp_session* session, int index,
char* channel_name, int* channel_flags)
{
int count;
struct xrdp_rdp* rdp;
struct xrdp_mcs* mcs;
struct mcs_channel_item* channel_item;
rdp = (struct xrdp_rdp*)session->rdp;
mcs = rdp->sec_layer->mcs_layer;
count = mcs->channel_list->count;
if (index < 0 || index >= count)
{
return 1;
}
channel_item = (struct mcs_channel_item*)
list_get_item(mcs->channel_list, index);
if (channel_item == 0)
{
/* this should not happen */
return 1;
}
if (channel_name != 0)
{
g_strncpy(channel_name, channel_item->name, 8);
}
if (channel_flags != 0)
{
*channel_flags = channel_item->flags;
}
return 0;
}
/*****************************************************************************/
/* returns a zero based index of the channel, -1 if error or it dosen't
exist */
int EXPORT_CC
libxrdp_get_channel_id(struct xrdp_session* session, char* name)
{
int index;
int count;
struct xrdp_rdp* rdp;
struct xrdp_mcs* mcs;
struct mcs_channel_item* channel_item;
rdp = (struct xrdp_rdp*)session->rdp;
mcs = rdp->sec_layer->mcs_layer;
count = mcs->channel_list->count;
for (index = 0; index < count; index++)
{
channel_item = (struct mcs_channel_item*)
list_get_item(mcs->channel_list, index);
if (channel_item != 0)
{
if (g_strcasecmp(name, channel_item->name) == 0)
{
return index;
}
}
}
return -1;
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_send_to_channel(struct xrdp_session* session, int channel_id,
char* data, int data_len)
{
struct xrdp_rdp* rdp;
struct xrdp_sec* sec;
struct xrdp_channel* chan;
struct stream* s;
rdp = (struct xrdp_rdp*)session->rdp;
sec = rdp->sec_layer;
chan = sec->chan_layer;
make_stream(s);
init_stream(s, data_len + 1024); /* this should be big enough */
if (xrdp_channel_init(chan, s) != 0)
{
free_stream(s);
return 1;
}
/* here we make a copy of the data, xrdp_channel_send is
going to alter it if its bigger that 8192 or something */
out_uint8a(s, data, data_len);
s_mark_end(s);
if (xrdp_channel_send(chan, s, channel_id) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
int EXPORT_CC
libxrdp_orders_send_brush(struct xrdp_session* session,
int width, int height, int bpp, int type,
int size, char* data, int cache_id)
{
return xrdp_orders_send_brush((struct xrdp_orders*)session->orders,
width, height, bpp, type, size, data,
cache_id);
}
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