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-rw-r--r--x11vnc/x11vnc.c258
1 files changed, 227 insertions, 31 deletions
diff --git a/x11vnc/x11vnc.c b/x11vnc/x11vnc.c
index 27148fc..f10b683 100644
--- a/x11vnc/x11vnc.c
+++ b/x11vnc/x11vnc.c
@@ -1,7 +1,7 @@
/*
* x11vnc.c: a VNC server for X displays.
*
- * Copyright (c) 2002-2004 Karl J. Runge <runge@karlrunge.com>
+ * Copyright (c) 2002-2005 Karl J. Runge <runge@karlrunge.com>
* All rights reserved.
*
* This is free software; you can redistribute it and/or modify
@@ -27,17 +27,22 @@
* krfb, the KDE desktopsharing project (Tim Jansen)
*
* The primary goal of this program is to create a portable and simple
- * command-line server utility that allows a VNC viewer to connect to an
- * actual X display (as the above do). The only non-standard dependency
- * of this program is the static library libvncserver.a (although in
- * some environments libjpeg.so may not be readily available and needs
- * to be installed, it may be found at ftp://ftp.uu.net/graphics/jpeg/).
- * To increase portability it is written in plain C.
+ * command-line server utility that allows a VNC viewer to connect
+ * to an actual X display (as the above do). The only non-standard
+ * dependency of this program is the static library libvncserver.a.
+ * Although in some environments libjpeg.so or libz.so may not be
+ * readily available and needs to be installed, they may be found
+ * at ftp://ftp.uu.net/graphics/jpeg/ and http://www.gzip.org/zlib/,
+ * respectively. To increase portability it is written in plain C.
*
- * The next goal is to improve performance and interactive response.
+ * Another goal is to improve performance and interactive response.
* The algorithm of x0rfbserver was used as a base. Additional heuristics
* are also applied (currently there are a bit too many of these...)
*
+ * Another goal is to add many features that enable and incourage creative
+ * Ausage and application of the tool. pologies for the large number
+ * Aof options!
+ *
* To build:
*
* Obtain the libvncserver package (http://libvncserver.sourceforge.net).
@@ -53,12 +58,13 @@
* Known shortcomings:
*
* The screen updates are good, but of course not perfect since the X
- * display must be continuously polled and read for changes (as opposed to
- * receiving a change callback from the X server, if that were generally
- * possible... (Update: this seems to be handled now with the X DAMAGE
- * extension, but unfortunately that doesn't seem to address the slow
- * read from the video h/w). So, e.g., opaque moves and similar window
- * activity can be very painful; one has to modify one's behavior a bit.
+ * display must be continuously polled and read for changes and this is
+ * slow for most hardware. This can be contrasted with receiving a change
+ * callback from the X server, if that were generally possible... (Update:
+ * this seems to be handled now with the X DAMAGE extension, but
+ * unfortunately that doesn't seem to address the slow read from the
+ * video h/w. So, e.g., opaque moves and similar window activity can
+ * be very painful; one has to modify one's behavior a bit.
*
* General audio at the remote display is lost unless one separately
* sets up some audio side-channel such as esd.
@@ -73,7 +79,10 @@
* the -cursor option. Further, if -cursorX or -X is used, a trick
* is done to at least show the root window cursor vs non-root cursor.
* (perhaps some heuristic can be done to further distinguish cases...,
- * currently -cursor some is a first hack at this)
+ * currently "-cursor some" is a first hack at this)
+ *
+ * Under XFIXES mode for showing the cursor shape, the cursor may be
+ * poorly approximated if it has transparency.
*
* Windows using visuals other than the default X visual may have
* their colors messed up. When using 8bpp indexed color, the colormap
@@ -83,9 +92,16 @@
* 24 visuals will incorrectly display windows using the non-default one.
* On Sun and Sgi hardware we can to work around this with -overlay.
*
- * Feature -id <windowid> can be picky: it can crash for things like the
- * window not sufficiently mapped into server memory, etc. SaveUnders
- * menus, popups, etc will not be seen.
+ * Feature -id <windowid> can be picky: it can crash for things like
+ * the window not sufficiently mapped into server memory, etc (Update:
+ * we now use the -xrandr mechanisms to trap errors for this mode).
+ * SaveUnders menus, popups, etc will not be seen.
+ *
+ * Under some situations the keysym unmapping is not correct, especially
+ * if the two keyboards correspond to different languages. The -modtweak
+ * option is the default and corrects most problems. One can use the
+ * -xkb option to try to use the XKEYBOARD extension to clear up any
+ * remaining problems.
*
* Occasionally, a few tile updates can be missed leaving a patch of
* color that needs to be refreshed. This may only be when threaded,
@@ -113,15 +129,23 @@
/*
* if you are inserting this file, x11vnc.c into an old CVS tree you
- * may need to set OLD_TREE to 1.
+ * may need to set OLD_TREE to 1. See below for LibVNCServer 0.7 tips.
*/
+
#define OLD_TREE 0
#if OLD_TREE
/*
- * if have a very old tree and get errors these may be needed as well:
+ * if you have a very old tree (LibVNCServer 0.6) and get errors these may
+ * be need to be uncommented. LibVNCServer <= 0.5 is no longer supported.
+ * note the maxRectsPerUpdate below is a hack that may break some usage.
#define oldCursorX cursorX
#define oldCursorY cursorY
+#define thisHost rfbThisHost
+#define framebufferUpdateMessagesSent rfbFramebufferUpdateMessagesSent
+#define bytesSent rfbBytesSent
+#define rawBytesEquivalent rfbRawBytesEquivalent
+#define progressiveSliceHeight maxRectsPerUpdate
*/
/*
@@ -189,8 +213,29 @@
#else
#define RFBUNDRAWCURSOR(s)
#endif
+/*
+ * To get a clean build in a LibVNCServer 0.7 source tree no need for
+ * OLD_TREE, you just need to either download the forgotten tkx11vnc.h
+ * file or run:
+ *
+ * echo 'char gui_code[] = "";' > tkx11vnc.h
+ *
+ * (this disables the gui) and uncomment this line:
+#define rfbSetCursor(a, b) rfbSetCursor((a), (b), FALSE)
+ */
+
+/*
+ * To get a clean build on LibVNCServer 0.7.1 no need for OLD_TREE,
+ * just uncomment this line (note the maxRectsPerUpdate below is a hack
+ * that may break some usage):
+ *
+#define listenInterface maxRectsPerUpdate
+ */
#if LIBVNCSERVER_HAVE_XSHM
+# if defined(__hpux) && defined(__ia64) /* something weird on hp/itanic */
+# undef _INCLUDE_HPUX_SOURCE
+# endif
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
@@ -290,7 +335,7 @@ static int xdamage_base_event_type;
#endif
/* date +'lastmod: %Y-%m-%d' */
-char lastmod[] = "0.7.1 lastmod: 2005-02-23";
+char lastmod[] = "0.7.2pre lastmod: 2005-03-04";
/* X display info */
@@ -579,6 +624,7 @@ int safe_remote_only = 0; /* -safer, -unsafe */
int started_as_root = 0;
char *users_list = NULL; /* -users */
char *allow_list = NULL; /* for -allow and -localhost */
+char *listen_str = NULL;
char *allow_once = NULL; /* one time -allow */
char *accept_cmd = NULL; /* for -accept */
char *gone_cmd = NULL; /* for -gone */
@@ -1688,7 +1734,7 @@ typedef unsigned int in_addr_t;
in_addr_t iaddr;
iaddr = inet_addr(ip);
- if (iaddr == INADDR_NONE) {
+ if (iaddr == htonl(INADDR_NONE)) {
return strdup("unknown");
}
@@ -7140,7 +7186,7 @@ void reset_httpport(int old, int new) {
close(screen->httpListenSock);
}
rfbLog("reset_httpport: setting httpport %d -> %d.\n",
- old, hp);
+ old == -1 ? hp : old, hp);
rfbHttpInitSockets(screen);
}
}
@@ -7171,7 +7217,7 @@ void reset_rfbport(int old, int new) {
}
rfbLog("reset_rfbport: setting rfbport %d -> %d.\n",
- old, rp);
+ old == -1 ? rp : old, rp);
rfbInitSockets(screen);
maxfd = screen->maxFd;
@@ -7731,7 +7777,9 @@ char *process_remote_cmd(char *cmd, int stringonly) {
char *before, *old;
if (query) {
int state = 0;
- if (allow_list && !strcmp(allow_list, "127.0.0.1")) {
+ char *s = allow_list;
+ if (s && (!strcmp(s, "127.0.0.1") ||
+ !strcmp(s, "localhost"))) {
state = 1;
}
snprintf(buf, bufn, "ans=%s:%d", p, state);
@@ -7753,11 +7801,26 @@ char *process_remote_cmd(char *cmd, int stringonly) {
}
if (old) free(old);
free(before);
+
+ if (listen_str) {
+ free(listen_str);
+ }
+ listen_str = strdup("localhost");
+
+ screen->listenInterface = htonl(INADDR_LOOPBACK);
+ rfbLog("listening on loopback network only.\n");
+ rfbLog("allow list is: '%s'\n", NONUL(allow_list));
+ reset_rfbport(-1, screen->port);
+ if (screen->httpListenSock > -1) {
+ reset_httpport(-1, screen->httpPort);
+ }
} else if (!strcmp(p, "nolocalhost")) {
char *before, *old;
if (query) {
int state = 0;
- if (allow_list && !strcmp(allow_list, "127.0.0.1")) {
+ char *s = allow_list;
+ if (s && (!strcmp(s, "127.0.0.1") ||
+ !strcmp(s, "localhost"))) {
state = 1;
}
snprintf(buf, bufn, "ans=%s:%d", p, !state);
@@ -7780,6 +7843,106 @@ char *process_remote_cmd(char *cmd, int stringonly) {
if (old) free(old);
free(before);
+ if (listen_str) {
+ free(listen_str);
+ }
+ listen_str = NULL;
+
+ screen->listenInterface = htonl(INADDR_ANY);
+ rfbLog("listening on ALL network interfaces.\n");
+ rfbLog("allow list is: '%s'\n", NONUL(allow_list));
+ reset_rfbport(-1, screen->port);
+ if (screen->httpListenSock > -1) {
+ reset_httpport(-1, screen->httpPort);
+ }
+
+ } else if (strstr(p, "listen") == p) {
+ char *before;
+ int ok, mod = 0;
+
+ COLON_CHECK("listen:")
+ if (query) {
+ snprintf(buf, bufn, "ans=%s%s%s", p, co,
+ NONUL(listen_str));
+ goto qry;
+ }
+ if (listen_str) {
+ before = strdup(listen_str);
+ } else {
+ before = strdup("");
+ }
+ p += strlen("listen:");
+
+ listen_str = strdup(p);
+
+ if (strcmp(before, listen_str)) {
+ rfbLog("process_remote_cmd: modified listen_str:\n");
+ rfbLog(" from: \"%s\"\n", before);
+ rfbLog(" to: \"%s\"\n", listen_str);
+ mod = 1;
+ }
+
+ ok = 1;
+ if (listen_str == NULL || *listen_str == '\0' ||
+ !strcmp(listen_str, "any")) {
+ screen->listenInterface = htonl(INADDR_ANY);
+ } else if (!strcmp(listen_str, "localhost")) {
+ screen->listenInterface = htonl(INADDR_LOOPBACK);
+ } else {
+ struct hostent *hp;
+ in_addr_t iface = inet_addr(listen_str);
+ if (iface == htonl(INADDR_NONE)) {
+ if (!(hp = gethostbyname(listen_str))) {
+ ok = 0;
+ } else {
+ iface = *(unsigned long *)hp->h_addr;
+ }
+ }
+ if (ok) {
+ screen->listenInterface = iface;
+ }
+ }
+
+ if (ok && mod) {
+ int is_loopback = 0;
+ in_addr_t iface = screen->listenInterface;
+
+ if (allow_list) {
+ if (!strcmp(allow_list, "127.0.0.1") ||
+ !strcmp(allow_list, "localhost")) {
+ is_loopback = 1;
+ }
+ }
+ if (iface != htonl(INADDR_LOOPBACK)) {
+ if (is_loopback) {
+ rfbLog("re-setting -allow list to all "
+ "hosts for non-loopback listening.\n");
+ free(allow_list);
+ allow_list = NULL;
+ }
+ } else {
+ if (!is_loopback) {
+ if (allow_list) {
+ free(allow_list);
+ }
+ rfbLog("setting -allow list to 127.0.0.1\n");
+ allow_list = strdup("127.0.0.1");
+ }
+ }
+ }
+ if (ok) {
+ rfbLog("allow list is: '%s'\n", NONUL(allow_list));
+ reset_rfbport(-1, screen->port);
+ if (screen->httpListenSock > -1) {
+ reset_httpport(-1, screen->httpPort);
+ }
+ free(before);
+ } else {
+ rfbLog("bad listen string: %s\n", listen_str);
+ free(listen_str);
+ listen_str = before;
+ }
+
} else if (strstr(p, "accept") == p) {
COLON_CHECK("accept:")
if (query) {
@@ -16079,7 +16242,7 @@ void initialize_speeds(void) {
s = strdup("6,4,200");
} else if (!strcmp(speeds_str, "dsl")) {
s = strdup("6,100,50");
- } else if (!strcmp(speeds_str, "modem")) {
+ } else if (!strcmp(speeds_str, "lan")) {
s = strdup("6,5000,1");
} else {
s = strdup(speeds_str);
@@ -16556,7 +16719,19 @@ static void print_help(int mode) {
" file containing addresses or prefixes that is re-read\n"
" each time a new client connects. Lines can be commented\n"
" out with the \"#\" character in the usual way.\n"
-"-localhost Same as -allow 127.0.0.1\n"
+"-localhost Same as \"-allow 127.0.0.1\".\n"
+"\n"
+" Note: if you want to restrict which network interface\n"
+" x11vnc listens on, see the -listen option below.\n"
+" E.g. \"-listen localhost\" or \"-listen 192.168.3.21\".\n"
+" As a special case, the option \"-localhost\" implies\n"
+" \"-listen localhost\".\n"
+"\n"
+" For non-localhost -listen usage, if you use the remote\n"
+" control mechanism (-R) to change the -listen interface\n"
+" you may need to manually adjust the -allow list (and\n"
+" vice versa) to avoid situations where no connections\n"
+" (or too many) are allowed.\n"
"\n"
"-input string Fine tuning of allowed user input. If \"string\" does\n"
" not contain a comma \",\" the tuning applies only to\n"
@@ -16708,7 +16883,7 @@ static void print_help(int mode) {
" database as well. So it \"lurks\" waiting for anyone\n"
" to log into an X session and then connects to it.\n"
" Specify a list of users after the = to limit which\n"
-" users will be tried. To enable a difference searching\n"
+" users will be tried. To enable a different searching\n"
" mode, if the first user in the list is something like\n"
" \":0\" or \":0-2\" that indicates a range of DISPLAY\n"
" numbers that will be tried (regardless of whether\n"
@@ -17286,6 +17461,7 @@ static void print_help(int mode) {
" use \"-host\" to delete a single host\n"
" localhost enable -localhost mode\n"
" nolocalhost disable -localhost mode\n"
+" listen:str set -listen to str, empty to disable.\n"
" input:str set -input to \"str\", empty to disable.\n"
" client_input:str set the K, M, B -input on a per-client\n"
" basis. select which client as for\n"
@@ -17456,7 +17632,7 @@ static void print_help(int mode) {
" overlay_nocursor visual scale viewonly noviewonly\n"
" shared noshared forever noforever once timeout deny\n"
" lock nodeny unlock connect allowonce allow localhost\n"
-" nolocalhost accept gone shm noshm flipbyteorder\n"
+" nolocalhost listen accept gone shm noshm flipbyteorder\n"
" noflipbyteorder onetile noonetile solid_color solid\n"
" nosolid blackout xinerama noxinerama xrandr noxrandr\n"
" xrandr_mode padgeom quiet q noquiet modtweak nomodtweak\n"
@@ -17606,6 +17782,11 @@ void set_vnc_desktop_name(void) {
if (screen->port) {
char *host = this_host();
int lport = screen->port;
+ char *iface = listen_str;
+
+ if (iface != NULL && *iface != '\0' && strcmp(iface, "any")) {
+ host = iface;
+ }
if (host != NULL) {
/* note that vncviewer special cases 5900-5999 */
if (inetd) {
@@ -18159,7 +18340,7 @@ int main(int argc, char* argv[]) {
} else if (!strcmp(arg, "-?") || !strcmp(arg, "-opts")) {
print_help(1);
} else if (!strcmp(arg, "-V") || !strcmp(arg, "-version")) {
- fprintf(stderr, "x11vnc: %s\n", lastmod);
+ fprintf(stdout, "x11vnc: %s\n", lastmod);
exit(0);
} else if (!strcmp(arg, "-q") || !strcmp(arg, "-quiet")) {
quiet = 1;
@@ -18377,6 +18558,9 @@ int main(int argc, char* argv[]) {
if (!strcmp(arg, "-nevershared")) {
got_nevershared = 1;
}
+ if (!strcmp(arg, "-listen") && i < argc-1) {
+ listen_str = strdup(argv[i+1]);
+ }
/* otherwise copy it for libvncserver use below. */
if (argc_vnc < 100) {
argv_vnc[argc_vnc++] = strdup(arg);
@@ -18615,6 +18799,18 @@ int main(int argc, char* argv[]) {
}
}
+ /* tie together cases of -localhost vs. -listen localhost */
+ if (! listen_str) {
+ if (allow_list && !strcmp(allow_list, "127.0.0.1")) {
+ listen_str = strdup("localhost");
+ argv_vnc[argc_vnc++] = strdup("-listen");
+ argv_vnc[argc_vnc++] = strdup(listen_str);
+ }
+ } else if (!strcmp(listen_str, "localhost") ||
+ !strcmp(listen_str, "127.0.0.1")) {
+ allow_list = strdup("127.0.0.1");
+ }
+
if (! quiet) {
fprintf(stderr, "\n");
fprintf(stderr, "Settings:\n");
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-16 06:32:14 +0000