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xrdp-proprietary/xup/xup.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 2005-2012
libxup main file
*/
#include "xup.h"
#include <arpa/inet.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <netdb.h>
/******************************************************************************/
/**
*
* @brief checks if there's a server running on a host and port
* @param display the display to check
* @return 0 if the port is closed, 1 if it is open
*
*/
static int DEFAULT_CC
check_port_status(const char* host, const char* port)
{
char text[256];
int x_running;
int sck;
struct sockaddr_in servaddr;
int soc = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
g_memset( &servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(atoi(port));
struct hostent* hostaddr;
hostaddr = gethostbyname(host);
g_memcpy(&servaddr.sin_addr, hostaddr->h_addr, hostaddr->h_length);
int res = connect(soc, (struct sockaddr*)&servaddr, sizeof(servaddr));
close(soc);
if (res == -1)
{
// Port is closed, no server there!
return 0;
}
else {
// Port is open
return 1;
}
}
/******************************************************************************/
/**
*
* @brief checks if there's a server running on a remote display
* @param display the display to check
* @return 0 if there isn't a display running, nonzero otherwise
*
*/
static int DEFAULT_CC
x_server_running_check_remote_port(const char* host, const char* port)
{
int x_running;
int sck;
x_running = 0;
x_running += check_port_status(host, port);
return x_running;
}
/******************************************************************************/
static int APP_CC
wait_for_remote_xserver(const char* host, const char* port)
{
int i;
/* give X a bit to start */
/* wait up to 15 secs for x server to start */
i = 0;
while (!x_server_running_check_remote_port(host, port))
{
i++;
if (i > 60)
{
break;
}
g_sleep(250);
}
return 0;
}
/******************************************************************************/
/* returns error */
int DEFAULT_CC
lib_recv(struct mod* mod, char* data, int len)
{
int rcvd;
if (mod->sck_closed)
{
return 1;
}
while (len > 0)
{
rcvd = g_tcp_recv(mod->sck, data, len, 0);
if (rcvd == -1)
{
if (g_tcp_last_error_would_block(mod->sck))
{
if (mod->server_is_term(mod))
{
return 1;
}
g_tcp_can_recv(mod->sck, 10);
}
else
{
return 1;
}
}
else if (rcvd == 0)
{
mod->sck_closed = 1;
return 1;
}
else
{
data += rcvd;
len -= rcvd;
}
}
return 0;
}
/*****************************************************************************/
/* returns error */
int DEFAULT_CC
lib_send(struct mod* mod, char* data, int len)
{
int sent;
if (mod->sck_closed)
{
return 1;
}
while (len > 0)
{
sent = g_tcp_send(mod->sck, data, len, 0);
if (sent == -1)
{
if (g_tcp_last_error_would_block(mod->sck))
{
if (mod->server_is_term(mod))
{
return 1;
}
g_tcp_can_send(mod->sck, 10);
}
else
{
return 1;
}
}
else if (sent == 0)
{
mod->sck_closed = 1;
return 1;
}
else
{
data += sent;
len -= sent;
}
}
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_start(struct mod* mod, int w, int h, int bpp)
{
LIB_DEBUG(mod, "in lib_mod_start");
mod->width = w;
mod->height = h;
mod->bpp = bpp;
LIB_DEBUG(mod, "out lib_mod_start");
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_connect(struct mod* mod)
{
int error;
int len;
int i;
int index;
int use_uds;
struct stream* s;
char con_port[256];
LIB_DEBUG(mod, "in lib_mod_connect");
/* clear screen */
mod->server_begin_update(mod);
mod->server_set_fgcolor(mod, 0);
mod->server_fill_rect(mod, 0, 0, mod->width, mod->height);
mod->server_end_update(mod);
mod->server_msg(mod, "started connecting", 0);
/* only support 8, 15, 16, and 24 bpp connections from rdp client */
if (mod->bpp != 8 && mod->bpp != 15 && mod->bpp != 16 && mod->bpp != 24)
{
mod->server_msg(mod,
"error - only supporting 8, 15, 16, and 24 bpp rdp connections", 0);
LIB_DEBUG(mod, "out lib_mod_connect error");
return 1;
}
char text[256];
g_snprintf(text, 255, "allocating resources on %s, please wait...\n\r", mod->ip);
mod->server_msg(mod, text, 0);
// Prevent an immediate RDP exit
wait_for_remote_xserver(mod->ip, mod->port);
// FIXME CRITICAL
// Prevent an immediate RDP exit
// Why is this still needed even after waiting for the X11rdp server to start!?!?
// I suspect the X11rdp server is not quite ready to accept new connections when we try to connect
// It is possible that this problem will go away on an Infiniband interconnect, but for now sleeping for 10 seconds seems to work around the problem on 100M Ethernet
g_sleep(10000);
if (g_strcmp(mod->ip, "") == 0)
{
mod->server_msg(mod, "error - no ip set", 0);
LIB_DEBUG(mod, "out lib_mod_connect error");
return 1;
}
make_stream(s);
g_sprintf(con_port, "%s", mod->port);
use_uds = 0;
if (con_port[0] == '/')
{
use_uds = 1;
}
mod->sck_closed = 0;
i = 0;
while (1)
{
if (use_uds)
{
mod->sck = g_tcp_local_socket();
}
else
{
mod->sck = g_tcp_socket();
g_tcp_set_non_blocking(mod->sck);
g_tcp_set_no_delay(mod->sck);
}
mod->server_msg(mod, "connecting...", 0);
if (use_uds)
{
error = g_tcp_local_connect(mod->sck, con_port);
}
else
{
error = g_tcp_connect(mod->sck, mod->ip, con_port);
}
if (error == -1)
{
if (g_tcp_last_error_would_block(mod->sck))
{
error = 0;
index = 0;
while (!g_tcp_can_send(mod->sck, 100))
{
index++;
if ((index >= 30) || mod->server_is_term(mod))
{
mod->server_msg(mod, "connect timeout", 0);
error = 1;
break;
}
}
}
else
{
mod->server_msg(mod, "connect error", 0);
}
}
if (error == 0)
{
break;
}
g_tcp_close(mod->sck);
mod->sck = 0;
i++;
if (i >= 4)
{
mod->server_msg(mod, "connection problem, giving up", 0);
break;
}
g_sleep(250);
}
if (error == 0)
{
/* send version message */
init_stream(s, 8192);
s_push_layer(s, iso_hdr, 4);
out_uint16_le(s, 103);
out_uint32_le(s, 301);
out_uint32_le(s, 0);
out_uint32_le(s, 0);
out_uint32_le(s, 0);
out_uint32_le(s, 1);
s_mark_end(s);
len = (int)(s->end - s->data);
s_pop_layer(s, iso_hdr);
out_uint32_le(s, len);
lib_send(mod, s->data, len);
}
if (error == 0)
{
/* send screen size message */
init_stream(s, 8192);
s_push_layer(s, iso_hdr, 4);
out_uint16_le(s, 103);
out_uint32_le(s, 300);
out_uint32_le(s, mod->width);
out_uint32_le(s, mod->height);
out_uint32_le(s, mod->bpp);
out_uint32_le(s, 0);
s_mark_end(s);
len = (int)(s->end - s->data);
s_pop_layer(s, iso_hdr);
out_uint32_le(s, len);
lib_send(mod, s->data, len);
}
if (error == 0)
{
/* send invalidate message */
init_stream(s, 8192);
s_push_layer(s, iso_hdr, 4);
out_uint16_le(s, 103);
out_uint32_le(s, 200);
/* x and y */
i = 0;
out_uint32_le(s, i);
/* width and height */
i = ((mod->width & 0xffff) << 16) | mod->height;
out_uint32_le(s, i);
out_uint32_le(s, 0);
out_uint32_le(s, 0);
s_mark_end(s);
len = (int)(s->end - s->data);
s_pop_layer(s, iso_hdr);
out_uint32_le(s, len);
lib_send(mod, s->data, len);
}
free_stream(s);
if (error != 0)
{
mod->server_msg(mod, "some problem", 0);
LIB_DEBUG(mod, "out lib_mod_connect error");
return 1;
}
else
{
mod->server_msg(mod, "connected ok", 0);
mod->sck_obj = g_create_wait_obj_from_socket(mod->sck, 0);
}
LIB_DEBUG(mod, "out lib_mod_connect");
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_event(struct mod* mod, int msg, tbus param1, tbus param2,
tbus param3, tbus param4)
{
struct stream* s;
int len;
int key;
int rv;
LIB_DEBUG(mod, "in lib_mod_event");
make_stream(s);
if ((msg >= 15) && (msg <= 16)) /* key events */
{
key = param2;
if (key > 0)
{
if (key == 65027) /* altgr */
{
if (mod->shift_state)
{
g_writeln("special");
/* fix for mstsc sending left control down with altgr */
/* control down / up
msg param1 param2 param3 param4
15 0 65507 29 0
16 0 65507 29 49152 */
init_stream(s, 8192);
s_push_layer(s, iso_hdr, 4);
out_uint16_le(s, 103);
out_uint32_le(s, 16); /* key up */
out_uint32_le(s, 0);
out_uint32_le(s, 65507); /* left control */
out_uint32_le(s, 29); /* RDP scan code */
out_uint32_le(s, 0xc000); /* flags */
s_mark_end(s);
len = (int)(s->end - s->data);
s_pop_layer(s, iso_hdr);
out_uint32_le(s, len);
lib_send(mod, s->data, len);
}
}
if (key == 65507) /* left control */
{
mod->shift_state = msg == 15;
}
}
}
init_stream(s, 8192);
s_push_layer(s, iso_hdr, 4);
out_uint16_le(s, 103);
out_uint32_le(s, msg);
out_uint32_le(s, param1);
out_uint32_le(s, param2);
out_uint32_le(s, param3);
out_uint32_le(s, param4);
s_mark_end(s);
len = (int)(s->end - s->data);
s_pop_layer(s, iso_hdr);
out_uint32_le(s, len);
rv = lib_send(mod, s->data, len);
free_stream(s);
LIB_DEBUG(mod, "out lib_mod_event");
return rv;
}
/******************************************************************************/
/* return error */
static int APP_CC
process_server_window_new_update(struct mod* mod, struct stream* s)
{
int flags;
int window_id;
int title_bytes;
int index;
int bytes;
int rv;
struct rail_window_state_order rwso;
g_memset(&rwso, 0, sizeof(rwso));
in_uint32_le(s, window_id);
in_uint32_le(s, rwso.owner_window_id);
in_uint32_le(s, rwso.style);
in_uint32_le(s, rwso.extended_style);
in_uint32_le(s, rwso.show_state);
in_uint16_le(s, title_bytes);
if (title_bytes > 0)
{
rwso.title_info = g_malloc(title_bytes + 1, 0);
in_uint8a(s, rwso.title_info, title_bytes);
rwso.title_info[title_bytes] = 0;
}
in_uint32_le(s, rwso.client_offset_x);
in_uint32_le(s, rwso.client_offset_y);
in_uint32_le(s, rwso.client_area_width);
in_uint32_le(s, rwso.client_area_height);
in_uint32_le(s, rwso.rp_content);
in_uint32_le(s, rwso.root_parent_handle);
in_uint32_le(s, rwso.window_offset_x);
in_uint32_le(s, rwso.window_offset_y);
in_uint32_le(s, rwso.window_client_delta_x);
in_uint32_le(s, rwso.window_client_delta_y);
in_uint32_le(s, rwso.window_width);
in_uint32_le(s, rwso.window_height);
in_uint16_le(s, rwso.num_window_rects);
if (rwso.num_window_rects > 0)
{
bytes = sizeof(struct rail_window_rect) * rwso.num_window_rects;
rwso.window_rects = (struct rail_window_rect*)g_malloc(bytes, 0);
for (index = 0; index < rwso.num_window_rects; index++)
{
in_uint16_le(s, rwso.window_rects[index].left);
in_uint16_le(s, rwso.window_rects[index].top);
in_uint16_le(s, rwso.window_rects[index].right);
in_uint16_le(s, rwso.window_rects[index].bottom);
}
}
in_uint32_le(s, rwso.visible_offset_x);
in_uint32_le(s, rwso.visible_offset_y);
in_uint16_le(s, rwso.num_visibility_rects);
if (rwso.num_visibility_rects > 0)
{
bytes = sizeof(struct rail_window_rect) * rwso.num_visibility_rects;
rwso.visibility_rects = (struct rail_window_rect*)g_malloc(bytes, 0);
for (index = 0; index < rwso.num_visibility_rects; index++)
{
in_uint16_le(s, rwso.visibility_rects[index].left);
in_uint16_le(s, rwso.visibility_rects[index].top);
in_uint16_le(s, rwso.visibility_rects[index].right);
in_uint16_le(s, rwso.visibility_rects[index].bottom);
}
}
in_uint32_le(s, flags);
mod->server_window_new_update(mod, window_id, &rwso, flags);
rv = 0;
g_free(rwso.title_info);
g_free(rwso.window_rects);
g_free(rwso.visibility_rects);
return rv;
}
/******************************************************************************/
/* return error */
static int APP_CC
process_server_window_delete(struct mod* mod, struct stream* s)
{
int window_id;
int rv;
in_uint32_le(s, window_id);
mod->server_window_delete(mod, window_id);
rv = 0;
return rv;
}
/******************************************************************************/
/* return error */
static int
lib_mod_process_orders(struct mod* mod, int type, struct stream* s)
{
int rv;
int x;
int y;
int cx;
int cy;
int srcx;
int srcy;
int len_bmpdata;
int style;
int x1;
int y1;
int x2;
int y2;
int rdpid;
int hints;
int mask;
int width;
int height;
int fgcolor;
int opcode;
char* bmpdata;
char cur_data[32 * (32 * 3)];
char cur_mask[32 * (32 / 8)];
rv = 0;
switch (type)
{
case 1: /* server_begin_update */
rv = mod->server_begin_update(mod);
break;
case 2: /* server_end_update */
rv = mod->server_end_update(mod);
break;
case 3: /* server_fill_rect */
in_sint16_le(s, x);
in_sint16_le(s, y);
in_uint16_le(s, cx);
in_uint16_le(s, cy);
rv = mod->server_fill_rect(mod, x, y, cx, cy);
break;
case 4: /* server_screen_blt */
in_sint16_le(s, x);
in_sint16_le(s, y);
in_uint16_le(s, cx);
in_uint16_le(s, cy);
in_sint16_le(s, srcx);
in_sint16_le(s, srcy);
rv = mod->server_screen_blt(mod, x, y, cx, cy, srcx, srcy);
break;
case 5: /* server_paint_rect */
in_sint16_le(s, x);
in_sint16_le(s, y);
in_uint16_le(s, cx);
in_uint16_le(s, cy);
in_uint32_le(s, len_bmpdata);
in_uint8p(s, bmpdata, len_bmpdata);
in_uint16_le(s, width);
in_uint16_le(s, height);
in_sint16_le(s, srcx);
in_sint16_le(s, srcy);
rv = mod->server_paint_rect(mod, x, y, cx, cy,
bmpdata, width, height,
srcx, srcy);
break;
case 10: /* server_set_clip */
in_sint16_le(s, x);
in_sint16_le(s, y);
in_uint16_le(s, cx);
in_uint16_le(s, cy);
rv = mod->server_set_clip(mod, x, y, cx, cy);
break;
case 11: /* server_reset_clip */
rv = mod->server_reset_clip(mod);
break;
case 12: /* server_set_fgcolor */
in_uint32_le(s, fgcolor);
rv = mod->server_set_fgcolor(mod, fgcolor);
break;
case 14:
in_uint16_le(s, opcode);
rv = mod->server_set_opcode(mod, opcode);
break;
case 17:
in_uint16_le(s, style);
in_uint16_le(s, width);
rv = mod->server_set_pen(mod, style, width);
break;
case 18:
in_sint16_le(s, x1);
in_sint16_le(s, y1);
in_sint16_le(s, x2);
in_sint16_le(s, y2);
rv = mod->server_draw_line(mod, x1, y1, x2, y2);
break;
case 19:
in_sint16_le(s, x);
in_sint16_le(s, y);
in_uint8a(s, cur_data, 32 * (32 * 3));
in_uint8a(s, cur_mask, 32 * (32 / 8));
rv = mod->server_set_cursor(mod, x, y, cur_data, cur_mask);
break;
case 20:
in_uint32_le(s, rdpid);
in_uint16_le(s, width);
in_uint16_le(s, height);
rv = mod->server_create_os_surface(mod, rdpid, width, height);
break;
case 21:
in_uint32_le(s, rdpid);
rv = mod->server_switch_os_surface(mod, rdpid);
break;
case 22:
in_uint32_le(s, rdpid);
rv = mod->server_delete_os_surface(mod, rdpid);
break;
case 23: /* server_paint_rect_os */
in_sint16_le(s, x);
in_sint16_le(s, y);
in_uint16_le(s, cx);
in_uint16_le(s, cy);
in_uint32_le(s, rdpid);
in_sint16_le(s, srcx);
in_sint16_le(s, srcy);
rv = mod->server_paint_rect_os(mod, x, y, cx, cy,
rdpid, srcx, srcy);
break;
case 24: /* server_set_hints */
in_uint32_le(s, hints);
in_uint32_le(s, mask);
rv = mod->server_set_hints(mod, hints, mask);
break;
case 25: /* server_window_new_update */
rv = process_server_window_new_update(mod, s);
break;
case 26: /* server_window_delete */
rv = process_server_window_delete(mod, s);
break;
default:
g_writeln("lib_mod_process_orders: unknown order type %d", type);
rv = 0;
break;
}
return rv;
}
/******************************************************************************/
/* return error */
static int APP_CC
lib_send_client_info(struct mod* mod)
{
struct stream* s;
int len;
make_stream(s);
init_stream(s, 8192);
s_push_layer(s, iso_hdr, 4);
out_uint16_le(s, 104);
g_memcpy(s->p, &(mod->client_info), sizeof(mod->client_info));
s->p += sizeof(mod->client_info);
s_mark_end(s);
len = (int)(s->end - s->data);
s_pop_layer(s, iso_hdr);
out_uint32_le(s, len);
lib_send(mod, s->data, len);
free_stream(s);
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_signal(struct mod* mod)
{
struct stream* s;
int num_orders;
int index;
int rv;
int len;
int type;
char* phold;
LIB_DEBUG(mod, "in lib_mod_signal");
make_stream(s);
init_stream(s, 8192);
rv = lib_recv(mod, s->data, 8);
if (rv == 0)
{
in_uint16_le(s, type);
in_uint16_le(s, num_orders);
in_uint32_le(s, len);
if (type == 1) /* original order list */
{
init_stream(s, len);
rv = lib_recv(mod, s->data, len);
if (rv == 0)
{
for (index = 0; index < num_orders; index++)
{
in_uint16_le(s, type);
rv = lib_mod_process_orders(mod, type, s);
if (rv != 0)
{
break;
}
}
}
}
else if (type == 2) /* caps */
{
g_writeln("lib_mod_signal: type 2 len %d", len);
init_stream(s, len);
rv = lib_recv(mod, s->data, len);
if (rv == 0)
{
for (index = 0; index < num_orders; index++)
{
phold = s->p;
in_uint16_le(s, type);
in_uint16_le(s, len);
switch (type)
{
default:
g_writeln("lib_mod_signal: unknown cap type %d len %d",
type, len);
break;
}
s->p = phold + len;
}
lib_send_client_info(mod);
}
}
else if (type == 3) /* order list with len after type */
{
init_stream(s, len);
rv = lib_recv(mod, s->data, len);
if (rv == 0)
{
for (index = 0; index < num_orders; index++)
{
phold = s->p;
in_uint16_le(s, type);
in_uint16_le(s, len);
rv = lib_mod_process_orders(mod, type, s);
if (rv != 0)
{
break;
}
s->p = phold + len;
}
}
}
else
{
g_writeln("unknown type %d", type);
}
}
free_stream(s);
LIB_DEBUG(mod, "out lib_mod_signal");
return rv;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_end(struct mod* mod)
{
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_set_param(struct mod* mod, char* name, char* value)
{
if (g_strcasecmp(name, "username") == 0)
{
g_strncpy(mod->username, value, 255);
}
else if (g_strcasecmp(name, "password") == 0)
{
g_strncpy(mod->password, value, 255);
}
else if (g_strcasecmp(name, "ip") == 0)
{
g_strncpy(mod->ip, value, 255);
}
else if (g_strcasecmp(name, "port") == 0)
{
g_strncpy(mod->port, value, 255);
}
else if (g_strcasecmp(name, "client_info") == 0)
{
g_memcpy(&(mod->client_info), value, sizeof(mod->client_info));
}
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_get_wait_objs(struct mod* mod, tbus* read_objs, int* rcount,
tbus* write_objs, int* wcount, int* timeout)
{
int i;
i = *rcount;
if (mod != 0)
{
if (mod->sck_obj != 0)
{
read_objs[i++] = mod->sck_obj;
}
}
*rcount = i;
return 0;
}
/******************************************************************************/
/* return error */
int DEFAULT_CC
lib_mod_check_wait_objs(struct mod* mod)
{
int rv;
rv = 0;
if (mod != 0)
{
if (mod->sck_obj != 0)
{
if (g_is_wait_obj_set(mod->sck_obj))
{
rv = lib_mod_signal(mod);
}
}
}
return rv;
}
/******************************************************************************/
struct mod* EXPORT_CC
mod_init(void)
{
struct mod* mod;
mod = (struct mod*)g_malloc(sizeof(struct mod), 1);
mod->size = sizeof(struct mod);
mod->version = CURRENT_MOD_VER;
mod->handle = (tbus)mod;
mod->mod_connect = lib_mod_connect;
mod->mod_start = lib_mod_start;
mod->mod_event = lib_mod_event;
mod->mod_signal = lib_mod_signal;
mod->mod_end = lib_mod_end;
mod->mod_set_param = lib_mod_set_param;
mod->mod_get_wait_objs = lib_mod_get_wait_objs;
mod->mod_check_wait_objs = lib_mod_check_wait_objs;
return mod;
}
/******************************************************************************/
int EXPORT_CC
mod_exit(struct mod* mod)
{
if (mod == 0)
{
return 0;
}
g_delete_wait_obj_from_socket(mod->sck_obj);
g_tcp_close(mod->sck);
g_free(mod);
return 0;
}
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