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x11vnc: extend -allow to re-read a file with allowed IP addresses.

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pull/1/head
runge 20 years ago
parent 515dbae42a
commit 4015b99262
2 changed files with 103 additions and 38 deletions
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4
x11vnc/ChangeLog
Unescape View File

@ -1,3 +1,7 @@
2004-07-04 Karl Runge <runge@karlrunge.com>
* extend -allow to re-read a file with allowed IP addresses.
* improvements to -help text.
2004-07-01 Karl Runge <runge@karlrunge.com>
* improve scaled grid calculation to prevent drift (which causes
drift in pixel weights and poorer tightvnc compression)

137
x11vnc/x11vnc.c
Unescape View File

@ -156,7 +156,7 @@
#endif
/* date +'"lastmod: %Y-%m-%d";' */
char lastmod[] = "lastmod: 2004-07-01";
char lastmod[] = "lastmod: 2004-07-04";
/* X display info */
Display *dpy = 0;
@ -757,10 +757,51 @@ static int check_access(char *addr) {
return 0;
}
list = strdup(allow_list);
p = strtok(list, ",");
if (strchr(allow_list, '/')) {
/* a file of IP addresess or prefixes */
int len;
struct stat sbuf;
FILE *in;
char line[1024], *q;
if (stat(allow_list, &sbuf) != 0) {
rfbLog("check_access: failure stating file: %s\n",
allow_list);
rfbLogPerror("stat");
clean_up_exit(1);
}
len = sbuf.st_size + 1; /* 1 more for '\0' at end */
list = malloc(len);
list[0] = '\0';
in = fopen(allow_list, "r");
if (in == NULL) {
rfbLog("check_access: cannot open: %s\n", allow_list);
rfbLogPerror("fopen");
clean_up_exit(1);
}
while (fgets(line, 1024, in) != NULL) {
if ( (q = strchr(line, '#')) != NULL) {
*q = '\0';
}
if (strlen(list) + strlen(line) >= len) {
break;
}
strcat(list, line);
}
fclose(in);
} else {
list = strdup(allow_list);
}
p = strtok(list, ", \t\n\r");
while (p) {
char *q = strstr(addr, p);
char *q;
if (*p == '\0') {
continue;
}
q = strstr(addr, p);
if (q == addr) {
rfbLog("check_access: client %s matches pattern %s\n",
addr, p);
@ -769,7 +810,7 @@ static int check_access(char *addr) {
} else if(!strcmp(p,"localhost") && !strcmp(addr,"127.0.0.1")) {
allowed = 1;
}
p = strtok(NULL, ",");
p = strtok(NULL, ", \t\n\r");
}
free(list);
return allowed;
@ -1304,7 +1345,7 @@ static int accept_client(rfbClientPtr client) {
*/
static void check_connect_file(char *file) {
FILE *in;
char line[512], host[512];
char line[1024], host[1024];
static int first_warn = 1, truncate_ok = 1;
static time_t last_time = 0;
time_t now = time(0);
@ -1328,13 +1369,13 @@ static void check_connect_file(char *file) {
if (in == NULL) {
if (first_warn) {
rfbLog("check_connect_file: fopen failure: %s\n", file);
perror("fopen");
rfbLogPerror("fopen");
first_warn = 0;
}
return;
}
if (fgets(line, 512, in) != NULL) {
if (fgets(line, 1024, in) != NULL) {
if (sscanf(line, "%s", host) == 1) {
if (strlen(host) > 0) {
client_connect = strdup(host);
@ -1367,7 +1408,7 @@ static int do_reverse_connect(char *str) {
if (len < 1) {
return 0;
}
if (len > 512) {
if (len > 1024) {
rfbLog("reverse_connect: string too long: %d bytes\n", len);
return 0;
}
@ -1778,7 +1819,7 @@ void initialize_remap(char *infile) {
/* assume cmd line key1-key2,key3-key4 */
if (! strchr(infile, '-') || (in = tmpfile()) == NULL) {
rfbLog("remap: cannot open: %s\n", infile);
perror("fopen");
rfbLogPerror("fopen");
clean_up_exit(1);
}
p = infile;
@ -3913,7 +3954,7 @@ void initialize_screen(int *argc, char **argv, XImage *fb) {
int fd = dup(0);
if (fd < 3) {
rfbErr("dup(0) = %d failed.\n", fd);
perror("dup");
rfbLogPerror("dup");
clean_up_exit(1);
}
fclose(stdin);
@ -4437,7 +4478,7 @@ static int shm_create(XShmSegmentInfo *shm, XImage **ximg_ptr, int w, int h,
if (shm->shmid == -1) {
rfbErr("shmget(%s) failed.\n", name);
perror("shmget");
rfbLogPerror("shmget");
XDestroyImage(xim);
*ximg_ptr = NULL;
@ -4450,7 +4491,7 @@ static int shm_create(XShmSegmentInfo *shm, XImage **ximg_ptr, int w, int h,
if (shm->shmaddr == (char *)-1) {
rfbErr("shmat(%s) failed.\n", name);
perror("shmat");
rfbLogPerror("shmat");
XDestroyImage(xim);
*ximg_ptr = NULL;
@ -4903,7 +4944,7 @@ static void scale_and_mark_rect(int X1, int Y1, int X2, int Y2) {
#if 0
dx = (double) Nx / nx;
dy = (double) Ny / ny;
#endif
#else
/*
* This new way is probably the best we can do, take the inverse
@ -4911,6 +4952,7 @@ static void scale_and_mark_rect(int X1, int Y1, int X2, int Y2) {
*/
dx = 1.0/scale_fac;
dy = 1.0/scale_fac;
#endif
/*
* find the extent of the change the input rectangle induces in
@ -6696,14 +6738,18 @@ static void print_help(void) {
" and response may be slower. If \"fraction\" contains\n"
" a decimal point \".\" it is taken as a floating point\n"
" number, alternatively the notation \"m/n\" may be used\n"
" to denote fractions, e.g. -scale 2/3. If you just want\n"
" a quick, rough scaling without blending, append \":nb\"\n"
" to \"fraction\" (e.g. -scale 1/3:nb).\n"
" to denote fractions, e.g. -scale 2/3.\n"
"\n"
" For compatibility with vncviewers, the scaled width\n"
" is adjusted to be a multiple of 4. To disable this\n"
" use \":n4\". Separate multiple -scale \":\" options\n"
" via commas.\n"
" Scaling Options: can be added after fraction via \":\",\n"
" to supply multiple \":\" options use commas.\n"
" If you just want a quick, rough scaling without\n"
" blending, append \":nb\" to \"fraction\" (e.g. -scale\n"
" 1/3:nb). For compatibility with vncviewers the scaled\n"
" width is adjusted to be a multiple of 4, to disable\n"
" this use \":n4\". More esoteric options: \":in\" use\n"
" interpolation scheme even when shrinking, \":pad\",\n"
" pad scaled width and height to be multiples of scaling\n"
" denominator (e.g. 3 for 2/3).\n"
"-visual n Experimental option: probably does not do what you\n"
" think. It simply *forces* the visual used for the\n"
" framebuffer; this may be a bad thing... It is useful for\n"
@ -6715,22 +6761,33 @@ static void print_help(void) {
"\n"
"-viewonly All clients can only watch (default %s).\n"
"-shared VNC display is shared (default %s).\n"
"-once Exit after the first successfully connected viewer\n"
" disconnects. This is the Default behavior.\n"
"-forever Keep listening for more connections rather than exiting\n"
" as soon as the first client(s) disconnect. Same as -many\n"
"-connect string For use with \"vncviewer -listen\" reverse connections.\n"
" If string has the form \"host\" or \"host:port\"\n"
" the connection is made once at startup. Use commas\n"
" for a list. If string contains \"/\" it is a file to\n"
" for a list of host's and host:port's. If string\n"
" contains \"/\" it is instead interpreted as a file to\n"
" periodically check for new hosts. The first line is\n"
" read and then file is truncated.\n"
"-vncconnect Monitor the VNC_CONNECT X property set by vncconnect(1).\n"
"-auth file Set the X authority file to be \"file\", equivalent to\n"
" setting the XAUTHORITY env. var to \"file\" before startup.\n"
" read and then the file is truncated.\n"
"-vncconnect Monitor the VNC_CONNECT X property set by the standard\n"
" VNC program vncconnect(1). When the property is set\n"
" to host or host:port establish a reverse connection.\n"
" Using xprop(1) instead of vncconnect may work, see FAQ.\n"
"-auth file Set the X authority file to be \"file\", equivalent\n"
" to setting the XAUTHORITY env. var to \"file\" before\n"
" startup.\n"
"-allow addr1[,addr2..] Only allow client connections from IP addresses matching\n"
" the comma separated list of numerical addresses.\n"
" Can be a prefix, e.g. \"192.168.100.\" to match a\n"
" simple subnet, for more control build libvncserver with\n"
" libwrap support.\n"
" simple subnet, for more control build libvncserver\n"
" with libwrap support. If the list contains a \"/\"\n"
" it instead is a interpreted as a file containing\n"
" addresses or prefixes that is re-read each time a new\n"
" client connects. Lines can be commented out with the\n"
" \"#\" character in the usual way.\n"
"-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"
@ -6842,11 +6899,13 @@ static void print_help(void) {
"-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"
" To map a key to a button click, use the fake keysyms\n"
" \"Button1\", ..., etc. E.g. -remap Super_R-Button2\n"
"-remap string Read keysym remappings from file named \"string\".\n"
" Format is one pair of keysyms per line (can be name\n"
" or hex value) separated by a space. If no file named\n"
" \"string\" exists, it is instead interpreted as this\n"
" form: key1-key2,key3-key4,... To map a key to a\n"
" button click, use the fake keysyms \"Button1\", ...,\n"
" etc. E.g. -remap Super_R-Button2\n"
"\n"
"-nofb Ignore framebuffer: only process keyboard and pointer.\n"
"-nobell Do not watch for XBell events.\n"
@ -7026,9 +7085,9 @@ static int argc2 = 0;
static char **argv2;
static void check_rcfile(int argc, char **argv) {
int i, norc = 0, argmax = 512;
int i, norc = 0, argmax = 1024;
char *infile = NULL;
char rcfile[512];
char rcfile[1024];
FILE *rc;
for (i=1; i < argc; i++) {
@ -7284,6 +7343,8 @@ int main(int argc, char* argv[]) {
accept_cmd = argv[++i];
} else if (!strcmp(arg, "-gone")) {
gone_cmd = argv[++i];
} else if (!strcmp(arg, "-once")) {
connect_once = 1;
} else if (!strcmp(arg, "-many")
|| !strcmp(arg, "-forever")) {
connect_once = 0;
@ -7479,7 +7540,7 @@ int main(int argc, char* argv[]) {
}
} else if (passwdfile) {
/* read passwd from file */
char line[512];
char line[1024];
FILE *in;
in = fopen(passwdfile, "r");
if (in == NULL) {
@ -7488,7 +7549,7 @@ int main(int argc, char* argv[]) {
perror("fopen");
exit(1);
}
if (fgets(line, 512, in) != NULL) {
if (fgets(line, 1024, in) != NULL) {
int len = strlen(line);
if (len > 0 && line[len-1] == '\n') {
line[len-1] = '\0';
@ -7496,7 +7557,7 @@ int main(int argc, char* argv[]) {
argv_vnc[argc_vnc++] = "-passwd";
argv_vnc[argc_vnc++] = strdup(line);
pw_loc = 100; /* just for pw_loc check below */
if (fgets(line, 512, in) != NULL) {
if (fgets(line, 1024, in) != NULL) {
/* try to read viewonly passwd from file */
int ok = 0;
len = strlen(line);

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