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x11vnc: -clear_mods -clear_keys -storepasswd, add RFB_SERVER_IP RFB_SERVER_PORT to -accept/-gone

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pull/1/head
runge 20 years ago
parent 992be8f5f7
commit f868d56ef1
3 changed files with 294 additions and 79 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2004-06-12 Karl Runge <runge@karlrunge.com>
* x11vnc: -clear_mods, -clear_keys, and -storepasswd,
* add RFB_SERVER_IP RFB_SERVER_PORT to -accept env.
2004-06-07 Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
* libvncserver/cursor.c, rfb/rfb.h: fix cursor trails
* */Makefile.am: stop automake nagging

7
x11vnc/ChangeLog
Unescape View File

@ -1,3 +1,10 @@
2004-06-12 Karl Runge <runge@karlrunge.com>
* add -clear_mods -clear_keys for (rare) case where keys are
not being released (e.g. Ctrl-C x11vnc thru x11vnc).
* export RFB_SERVER_IP and RFB_SERVER_PORT to -accept program
so that the tcp 4-tuple is completely specified.
* add -storepasswd <pass> <file> so storepasswd program not needed
2004-06-05 Karl Runge <runge@karlrunge.com>
* rearrange file for easier maintenance, indicating file breakup.
* add RFB_CLIENT_COUNT, number of other connected clients to

362
x11vnc/x11vnc.c
Unescape View File

@ -35,9 +35,8 @@
* To increase portability it is written in plain C.
*
* The next goal is to improve performance and interactive response.
* The algorithm currently used here to achieve this is that of krfb
* (based on x0rfbserver algorithm). Additional heuristics are also
* applied (currently there are a bit too many of these...)
* The algorithm of x0rfbserver was used as a base. Additional heuristics
* are also applied (currently there are a bit too many of these...)
*
* To build:
*
@ -79,14 +78,15 @@
* is attempted to be followed, but may become out of date. Use the
* -flashcmap option to have colormap flashing as the pointer moves
* windows with private colormaps (slow). Displays with mixed depth 8 and
* 24 visuals will incorrect display the non-default one.
* 24 visuals will incorrectly display windows using the non-default one.
*
* Feature -id <windowid> can be picky: it can crash for things like the
* window not sufficiently mapped into server memory, use of -mouse, etc.
* SaveUnders menus, popups, etc will not be seen.
*
* Occasionally, a few tile updates can be missed leaving a patch of
* color that needs to be refreshed.
* color that needs to be refreshed. This may only be when threaded,
* which is no longer the default.
*
* There seems to be a serious bug with simultaneous clients when
* threaded, currently the only workaround in this case is -nothreads.
@ -94,10 +94,11 @@
*/
/*
* These ' -- filename -- ' comments represent a partial cleanup: they
* are an odd way to indicate how this huge file could be split up someday
* into multiple files. Externs and other things would need to be done,
* but it indicates the breakup, including static keyword for local items.
* These ' -- filename -- ' comments represent a partial cleanup:
* they are an odd way to indicate how this huge file would be split up
* someday into multiple files. Not finished, externs and other things
* would need to be done, but it indicates the breakup, including static
* keyword for local items.
*
* The primary reason we do not break up this file is for user
* convenience: those wanting to use the latest version download a single
@ -131,6 +132,15 @@
#include <X11/XKBlib.h>
#endif
#ifdef LIBVNCSERVER_HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef LIBVNCSERVER_HAVE_NETINET_IN_H
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#endif
/*
* Temporary kludge: to run with -xinerama define the following
* macro (uncomment) and be sure to link with -lXinerama
@ -146,7 +156,7 @@
#endif
/* date +'"lastmod: %Y-%m-%d";' */
char lastmod[] = "lastmod: 2004-06-05";
char lastmod[] = "lastmod: 2004-06-11";
/* X display info */
Display *dpy = 0;
@ -188,7 +198,7 @@ typedef struct bout {
int x1, y1, x2, y2;
} blackout_t;
typedef struct tbout {
blackout_t bo[10]; /* hardwired max rectangles. */
blackout_t bo[16]; /* hardwired max rectangles. */
int cover;
int count;
} tile_blackout_t;
@ -211,38 +221,21 @@ int got_user_input = 0;
int got_pointer_input = 0;
int got_keyboard_input = 0;
int fb_copy_in_progress = 0;
int shut_down = 0;
/* string for the VNC_CONNECT property */
#define VNC_CONNECT_MAX 512
char vnc_connect_str[VNC_CONNECT_MAX+1];
Atom vnc_connect_prop = None;
/* XXX usleep(3) is not thread safe on some older systems... */
struct timeval _mysleep;
#define usleep2(x) \
_mysleep.tv_sec = (x) / 1000000; \
_mysleep.tv_usec = (x) % 1000000; \
select(0, NULL, NULL, NULL, &_mysleep);
#if !defined(X11VNC_USLEEP)
#undef usleep
#define usleep usleep2
#endif
/*
* Not sure why... but when threaded we have to mutex our X11 calls to
* avoid XIO crashes.
*/
MUTEX(x11Mutex);
#define X_LOCK LOCK(x11Mutex)
#define X_UNLOCK UNLOCK(x11Mutex)
#define X_INIT INIT_MUTEX(x11Mutex)
/* function prototypes */
/* function prototypes (see filename comment above) */
int all_clients_initialized(void);
void blackout_tiles(void);
void check_connect_inputs(void);
void clean_up_exit(int);
void clear_modifiers(int init);
void clear_keys(void);
void copy_screen(void);
double dtime(double *);
@ -310,6 +303,7 @@ int flash_cmap = 0; /* follow installed colormaps */
int force_indexed_color = 0; /* whether to force indexed color for 8bpp */
int use_modifier_tweak = 0; /* use the altgr_keyboard modifier tweak */
int clear_mods = 0; /* -clear_mods (1) and -clear_keys (2) */
int nofb = 0; /* do not send any fb updates */
int subwin = 0; /* -id */
@ -386,12 +380,44 @@ int got_nevershared = 0;
#endif
/* -- util.h -- */
/* XXX usleep(3) is not thread safe on some older systems... */
struct timeval _mysleep;
#define usleep2(x) \
_mysleep.tv_sec = (x) / 1000000; \
_mysleep.tv_usec = (x) % 1000000; \
select(0, NULL, NULL, NULL, &_mysleep);
#if !defined(X11VNC_USLEEP)
#undef usleep
#define usleep usleep2
#endif
/*
* following is based on IsModifierKey in Xutil.h
*/
#define ismodkey(keysym) \
((((KeySym)(keysym) >= XK_Shift_L) && ((KeySym)(keysym) <= XK_Hyper_R) && \
((KeySym)(keysym) != XK_Caps_Lock) && ((KeySym)(keysym) != XK_Shift_Lock)))
/*
* Not sure why... but when threaded we have to mutex our X11 calls to
* avoid XIO crashes.
*/
MUTEX(x11Mutex);
#define X_LOCK LOCK(x11Mutex)
#define X_UNLOCK UNLOCK(x11Mutex)
#define X_INIT INIT_MUTEX(x11Mutex)
/* -- cleanup.c -- */
/*
* Exiting and error handling routines
*/
static int exit_flag = 0;
int exit_sig = 0;
/*
* Normal exiting
@ -411,8 +437,14 @@ void clean_up_exit (int ret) {
}
}
if (clear_mods == 1) {
clear_modifiers(0);
} else if (clear_mods == 2) {
clear_keys();
}
X_LOCK;
XTestDiscard(dpy);
XCloseDisplay(dpy);
X_UNLOCK;
fflush(stderr);
@ -424,6 +456,7 @@ void clean_up_exit (int ret) {
*/
static void interrupted (int sig) {
int i;
exit_sig = sig;
if (exit_flag) {
exit_flag++;
if (use_threads) {
@ -439,6 +472,10 @@ static void interrupted (int sig) {
} else {
fprintf(stderr, "caught signal: %d\n", sig);
}
if (sig == SIGINT) {
shut_down = 1;
return;
}
/*
* to avoid deadlock, etc, just delete the shm areas and
* leave the X stuff hanging.
@ -457,6 +494,11 @@ static void interrupted (int sig) {
break;
}
}
if (clear_mods == 1) {
clear_modifiers(0);
} else if (clear_mods == 2) {
clear_keys();
}
if (sig) {
exit(2);
}
@ -543,11 +585,15 @@ static int run_user_command(char *cmd, rfbClientPtr client) {
static char env_rfb_client_id[100];
static char env_rfb_client_ip[100];
static char env_rfb_client_port[100];
static char env_rfb_server_ip[100];
static char env_rfb_server_port[100];
static char env_rfb_x11vnc_pid[100];
static char env_rfb_client_count[100];
char *addr = client->host;
int rc, fromlen, fromport;
struct sockaddr_in from;
int rc;
char *saddr_ip_str = NULL;
int saddr_len, saddr_port;
struct sockaddr_in saddr;
if (addr == NULL || addr[0] == '\0') {
addr = "unknown-host";
@ -566,15 +612,37 @@ static int run_user_command(char *cmd, rfbClientPtr client) {
putenv(env_rfb_x11vnc_pid);
/* set RFB_CLIENT_PORT to peer port for command to use */
fromlen = sizeof(from);
memset(&from, 0, sizeof(from));
fromport = -1;
if (!getpeername(client->sock, (struct sockaddr *)&from, &fromlen)) {
fromport = ntohs(from.sin_port);
saddr_len = sizeof(saddr);
memset(&saddr, 0, sizeof(saddr));
saddr_port = -1;
if (!getpeername(client->sock, (struct sockaddr *)&saddr, &saddr_len)) {
saddr_port = ntohs(saddr.sin_port);
}
sprintf(env_rfb_client_port, "RFB_CLIENT_PORT=%d", fromport);
sprintf(env_rfb_client_port, "RFB_CLIENT_PORT=%d", saddr_port);
putenv(env_rfb_client_port);
/*
* now do RFB_SERVER_IP and RFB_SERVER_PORT (i.e. us!)
* This will establish a 5-tuple (including tcp) the external
* program can potentially use to work out the virtual circuit
* for this connection.
*/
saddr_len = sizeof(saddr);
memset(&saddr, 0, sizeof(saddr));
saddr_port = -1;
saddr_ip_str = "unknown";
if (!getsockname(client->sock, (struct sockaddr *)&saddr, &saddr_len)) {
saddr_port = ntohs(saddr.sin_port);
#ifdef LIBVNCSERVER_HAVE_NETINET_IN_H
saddr_ip_str = inet_ntoa(saddr.sin_addr);
#endif
}
sprintf(env_rfb_server_ip, "RFB_SERVER_IP=%s", saddr_ip_str);
putenv(env_rfb_server_ip);
sprintf(env_rfb_server_port, "RFB_SERVER_PORT=%d", saddr_port);
putenv(env_rfb_server_port);
/*
* Better set DISPLAY to the one we are polling, if they
* want something trickier, they can handle on their own
@ -1497,7 +1565,7 @@ static KeyCode keycodes[0x100];
static KeyCode left_shift_code, right_shift_code, altgr_code;
void initialize_modtweak(void) {
KeySym key, *keymap;
KeySym keysym, *keymap;
int i, j, minkey, maxkey, syms_per_keycode;
memset(modifiers, -1, sizeof(modifiers));
@ -1511,16 +1579,16 @@ void initialize_modtweak(void) {
for (i = minkey; i <= maxkey; i++) {
KeySym lower, upper;
/* 2nd one */
key = keymap[(i - minkey) * syms_per_keycode + 1];
if (key != NoSymbol) {
keysym = keymap[(i - minkey) * syms_per_keycode + 1];
if (keysym != NoSymbol) {
continue;
}
/* 1st one */
key = keymap[(i - minkey) * syms_per_keycode + 0];
if (key == NoSymbol) {
keysym = keymap[(i - minkey) * syms_per_keycode + 0];
if (keysym == NoSymbol) {
continue;
}
XConvertCase(key, &lower, &upper);
XConvertCase(keysym, &lower, &upper);
if (lower != upper) {
keymap[(i - minkey) * syms_per_keycode + 0] = lower;
keymap[(i - minkey) * syms_per_keycode + 1] = upper;
@ -1528,11 +1596,11 @@ void initialize_modtweak(void) {
}
for (i = minkey; i <= maxkey; i++) {
for (j = 0; j < syms_per_keycode; j++) {
key = keymap[ (i - minkey) * syms_per_keycode + j ];
if ( key >= ' ' && key < 0x100
&& i == XKeysymToKeycode(dpy, key) ) {
keycodes[key] = i;
modifiers[key] = j;
keysym = keymap[ (i - minkey) * syms_per_keycode + j ];
if ( keysym >= ' ' && keysym < 0x100
&& i == XKeysymToKeycode(dpy, keysym) ) {
keycodes[keysym] = i;
modifiers[keysym] = j;
}
}
}
@ -1544,6 +1612,114 @@ void initialize_modtweak(void) {
XFree ((void *) keymap);
}
/*
* Routine to retreive current state keyboard. 1 means down, 0 up.
*/
static void get_keystate(int *keystate) {
int i, k;
char keys[32];
/* n.b. caller decides to X_LOCK or not. */
XQueryKeymap(dpy, keys);
for (i=0; i<32; i++) {
char c = keys[i];
for (k=0; k < 8; k++) {
if (c & 0x1) {
keystate[8*i + k] = 1;
} else {
keystate[8*i + k] = 0;
}
c = c >> 1;
}
}
}
/*
* Try to KeyRelease any non-Lock modifiers that are down.
*/
void clear_modifiers(int init) {
static KeyCode keycodes[256];
static KeySym keysyms[256];
static char *keystrs[256];
static int kcount = 0, first = 1;
int keystate[256];
int i, j, minkey, maxkey, syms_per_keycode;
KeySym *keymap;
KeySym keysym;
KeyCode keycode;
/* n.b. caller decides to X_LOCK or not. */
if (first) {
/*
* we store results in static arrays, to aid interrupted
* case, but modifiers could have changed during session...
*/
XDisplayKeycodes(dpy, &minkey, &maxkey);
keymap = XGetKeyboardMapping(dpy, minkey, (maxkey - minkey + 1),
&syms_per_keycode);
for (i = minkey; i <= maxkey; i++) {
for (j = 0; j < syms_per_keycode; j++) {
keysym = keymap[ (i - minkey) * syms_per_keycode + j ];
if (keysym == NoSymbol || ! ismodkey(keysym)) {
continue;
}
keycode = XKeysymToKeycode(dpy, keysym);
if (keycode == NoSymbol) {
continue;
}
keycodes[kcount] = keycode;
keysyms[kcount] = keysym;
keystrs[kcount] = strdup(XKeysymToString(keysym));
kcount++;
}
}
XFree((void *) keymap);
first = 0;
}
if (init) {
return;
}
get_keystate(keystate);
for (i=0; i < kcount; i++) {
keysym = keysyms[i];
keycode = keycodes[i];
if (! keystate[(int) keycode]) {
continue;
}
if (clear_mods) {
rfbLog("clear_modifiers: up: %-10s (0x%x) "
"keycode=0x%x\n", keystrs[i], keysym, keycode);
}
myXTestFakeKeyEvent(dpy, keycode, False, CurrentTime);
}
XFlush(dpy);
}
/*
* Attempt to set all keys to Up position. Can mess up typing at the
* physical keyboard so use with caution.
*/
void clear_keys(void) {
int k, keystate[256];
/* n.b. caller decides to X_LOCK or not. */
get_keystate(keystate);
for (k=0; k<256; k++) {
if (keystate[k]) {
KeyCode keycode = (KeyCode) k;
rfbLog("clear_keys: keycode=%d\n", keycode);
myXTestFakeKeyEvent(dpy, keycode, False, CurrentTime);
}
}
XFlush(dpy);
}
/*
* The following is for an experimental -remap option to allow the user
* to remap keystrokes. It is currently confusing wrt modifiers...
@ -1889,12 +2065,6 @@ MUTEX(pointerMutex);
#define MAX_BUTTON_EVENTS 50
static prtremap_t pointer_map[MAX_BUTTONS+1][MAX_BUTTON_EVENTS];
/*
* following is based on IsModifierKey in Xutil.h
*/
#define ismodkey(keysym) \
((((KeySym)(keysym) >= XK_Shift_L) && ((KeySym)(keysym) <= XK_Hyper_R)))
/*
* For parsing the -buttonmap sections, e.g. "4" or ":Up+Up+Up:"
*/
@ -4585,11 +4755,11 @@ static void copy_tiles(int tx, int ty, int nt) {
for (t=1; t <= nt; t++) {
first_line[t] = -1;
}
/* find the first line with difference: */
w1 = width1 * pixelsize;
w2 = width2 * pixelsize;
/* foreach line: */
for (line = 0; line < size_y; line++) {
/* foreach horizontal tile: */
@ -5640,7 +5810,6 @@ void scan_for_updates(void) {
*/
static int defer_update_nofb = 6; /* defer a shorter time under -nofb */
static int shut_down = 0;
/*
* We need to handle user input, particularly pointer input, carefully.
@ -5963,25 +6132,33 @@ static void print_help(void) {
"-localhost Same as -allow 127.0.0.1\n"
"-viewpasswd string Supply a 2nd password for view-only logins. The -passwd\n"
" (full-access) password must also be supplied.\n"
"-passwdfile filename Specify libvncserver -passwd via the first line of the\n"
" file \"filename\" instead of via command line. If a\n"
" second non blank line exists in the file it is taken\n"
" as a view-only password (i.e. -viewpasswd) Note: this\n"
" is a simple plaintext passwd, see also -rfbauth below.\n"
"-accept string Run a command (possibly to prompt the user at the\n"
" X11 display) to decide whether an incoming client\n"
" should be allowed to connect or not. \"string\" is\n"
" an external command run via system(3) (see below for\n"
" special cases). Be sure to quote \"string\" if it\n"
" contains spaces, etc. The RFB_CLIENT_IP environment\n"
" variable will be set to the incoming client IP number\n"
" and the port in RFB_CLIENT_PORT (or -1 if unavailable).\n"
" The x11vnc process id will be in RFB_X11VNC_PID, a\n"
" client id number in RFB_CLIENT_ID and the number of\n"
" other connected clients in RFB_CLIENT_COUNT. If the\n"
" external command returns 0 the client is accepted,\n"
" otherwise the client is rejected. See below for an\n"
" extension to accept a client view-only.\n"
"-passwdfile filename Specify libvncserver -passwd via the first line of\n"
" the file \"filename\" instead of via command line.\n"
" If a second non blank line exists in the file it is\n"
" taken as a view-only password (i.e. -viewpasswd) Note:\n"
" this is a simple plaintext passwd, see also -rfbauth\n"
" and -storepasswd below.\n"
"-storepasswd pass file Store password \"pass\" as the VNC password in the\n"
" file \"file\". Once the password is stored the\n"
" program exits. Use the password via \"-rfbauth file\"\n"
"-accept string Run a command (possibly to prompt the user at the X11\n"
" display) to decide whether an incoming client should be\n"
" allowed to connect or not. \"string\" is an external\n"
" command run via system(3) (see below for special cases).\n"
" Be sure to quote \"string\" if it contains spaces,\n"
" etc. If the external command returns 0 the client is\n"
" accepted, otherwise the client is rejected. See below\n"
" for an extension to accept a client view-only.\n"
"\n"
" Environment: The RFB_CLIENT_IP environment variable will\n"
" be set to the incoming client IP number and the port\n"
" in RFB_CLIENT_PORT (or -1 if unavailable). Similarly,\n"
" RFB_SERVER_IP and RFB_SERVER_PORT (the x11vnc side\n"
" of the connection), are set to allow identification\n"
" of the tcp virtual circuit. The x11vnc process\n"
" id will be in RFB_X11VNC_PID, a client id number in\n"
" RFB_CLIENT_ID, and the number of other connected clients\n"
" in RFB_CLIENT_COUNT.\n"
"\n"
" If \"string\" is \"popup\" then a builtin popup window\n"
" is used. The popup will time out after 120 seconds,\n"
@ -6053,6 +6230,13 @@ static void print_help(void) {
"-modtweak Handle AltGr/Shift modifiers for differing languages\n"
" between client and host (default %s).\n"
"-nomodtweak Send the keysym directly to the X server.\n"
"-clear_mods At startup and exit clear the modifier keys by sending\n"
" KeyRelease for each one. The Lock modifiers are skipped.\n"
" Used to clear the state if the display was accidentally\n"
" left with any pressed down. That should be rare.\n"
"-clear_keys As -clear_mods, except try to release any pressed key.\n"
" Intended for debugging. This option and -clear_mods\n"
" can interfere with typing at the physical keyboard.\n"
"-remap string Read keysym remappings from file \"string\". Format is\n"
" one pair of keysyms per line (can be name or hex value).\n"
" \"string\" can also be of form: key1-key2,key3-key4...\n"
@ -6287,6 +6471,16 @@ int main(int argc, char** argv) {
viewonly_passwd = strdup(argv[++i]);
} else if (!strcmp(arg, "-passwdfile")) {
passwdfile = argv[++i];
} else if (!strcmp(arg, "-storepasswd")) {
if (i+2 >= argc || vncEncryptAndStorePasswd(argv[i+1],
argv[i+2]) != 0) {
fprintf(stderr, "-storepasswd failed\n");
exit(1);
} else {
fprintf(stderr, "stored passwd in file %s\n",
argv[i+2]);
exit(0);
}
} else if (!strcmp(arg, "-shared")) {
shared = 1;
} else if (!strcmp(arg, "-auth")) {
@ -6321,6 +6515,10 @@ int main(int argc, char** argv) {
use_modifier_tweak = 1;
} else if (!strcmp(arg, "-nomodtweak")) {
use_modifier_tweak = 0;
} else if (!strcmp(arg, "-clear_mods")) {
clear_mods = 1;
} else if (!strcmp(arg, "-clear_keys")) {
clear_mods = 2;
} else if (!strcmp(arg, "-remap")) {
remap_file = argv[++i];
} else if (!strcmp(arg, "-blackout")) {
@ -6642,6 +6840,7 @@ int main(int argc, char** argv) {
fprintf(stderr, "using_shm: %d\n", using_shm);
fprintf(stderr, "flipbytes: %d\n", flip_byte_order);
fprintf(stderr, "mod_tweak: %d\n", use_modifier_tweak);
fprintf(stderr, "clearmods: %d\n", clear_mods);
fprintf(stderr, "remap: %s\n", remap_file ? remap_file
: "null");
fprintf(stderr, "blackout: %s\n", blackout_string
@ -6850,7 +7049,6 @@ int main(int argc, char** argv) {
fprintf(stderr, "warning: 24 bpp may have poor"
" performance.\n");
}
if (! dt) {
static char str[] = "-desktop";
argv2[argc2++] = str;
@ -6881,6 +7079,7 @@ int main(int argc, char** argv) {
initialize_signals();
if (blackouts) { /* blackout fb as needed. */
copy_screen();
}
@ -6893,6 +7092,11 @@ int main(int argc, char** argv) {
}
initialize_pointer_map(pointer_remap);
clear_modifiers(1);
if (clear_mods == 1) {
clear_modifiers(0);
}
if (! inetd) {
if (! screen->rfbPort || screen->rfbListenSock < 0) {
rfbLog("Error: could not obtain listening port.\n");

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