File kvm-studio-vnc.patch of Package kvm

Index: qemu-kvm-0.12.5/vnc.c
===================================================================
--- qemu-kvm-0.12.5.orig/vnc.c
+++ qemu-kvm-0.12.5/vnc.c
@@ -48,6 +48,7 @@
 
 static VncDisplay *vnc_display; /* needed for info vnc */
 static DisplayChangeListener *dcl;
+static int allowed_connections = 0;
 
 static char *addr_to_string(const char *format,
                             struct sockaddr_storage *sa,
@@ -1044,6 +1045,8 @@ static void vnc_disconnect_start(VncStat
 
 static void vnc_disconnect_finish(VncState *vs)
 {
+    static int num_disconnects = 0;
+
     if (vs->input.buffer) {
         qemu_free(vs->input.buffer);
         vs->input.buffer = NULL;
@@ -1076,10 +1079,19 @@ static void vnc_disconnect_finish(VncSta
 
     vnc_remove_timer(vs->vd);
     qemu_free(vs);
+
+    num_disconnects++;
+    if(allowed_connections > 0 && allowed_connections <= num_disconnects) {
+        VNC_DEBUG("Maximum number of disconnects (%d) reached:"
+                  " Session terminating\n", allowed_connections);
+        exit(0);
+    }
 }
 
 int vnc_client_io_error(VncState *vs, int ret, int last_errno)
 {
+    static int num_disconnects = 0;
+    
     if (ret == 0 || ret == -1) {
         if (ret == -1) {
             switch (last_errno) {
@@ -2478,6 +2490,39 @@ char *vnc_display_local_addr(DisplayStat
     return vnc_socket_local_addr("%s:%s", vs->lsock);
 }
 
+static void read_file_password(DisplayState *ds, char *filename) 
+{
+    FILE *pfile = NULL;
+    char *passwd = NULL;
+    int start = 0, length = 0, rc = 0;
+
+    if(strlen(filename) == 0) {
+	printf("No file supplied\n");
+	return;
+    }
+
+    pfile = fopen(filename, "r");
+    if(pfile == NULL) {
+	printf("Could not read from %s\n", filename);
+	return;
+    }
+
+    start  = ftell(pfile);
+    fseek(pfile, 0L, SEEK_END);
+    length = ftell(pfile);
+    fseek(pfile, 0L, start);
+
+    passwd = malloc(length+1);
+    rc = fread(passwd, 1, length, pfile);
+    fclose(pfile);
+    
+    if(rc == length && rc > 0) {
+	vnc_display_password(ds, passwd);
+    }
+    
+    free(passwd);
+}
+
 int vnc_display_open(DisplayState *ds, const char *display)
 {
     VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
@@ -2507,7 +2552,36 @@ int vnc_display_open(DisplayState *ds, c
     while ((options = strchr(options, ','))) {
         options++;
         if (strncmp(options, "password", 8) == 0) {
+	    char *start, *end;
+	    start = strchr(options, '=');
+	    end = strchr(options, ',');
             password = 1; /* Require password auth */
+	    if (start && (!end || (start < end))) {
+		int len = end ? end-(start+1) : strlen(start+1);
+		char *text = qemu_malloc(len+1);
+		strncpy(text, start+1, len);
+		text[len] = '\0';
+
+		if (strncmp(options, "password-file=", 14) == 0) {
+		    read_file_password(ds, text);
+		} else {
+		    vnc_display_password(ds, text);
+		}
+
+		free(text);
+	    }
+	} else if (strncmp(options, "allowed-connections=", 20) == 0) {
+	    char *start, *end;
+	    start = strchr(options, '=');
+	    end = strchr(options, ',');
+	    if (start && (!end || (start < end))) {
+		int len = end ? end-(start+1) : strlen(start+1);
+		char *text = qemu_malloc(len+1);
+		strncpy(text, start+1, len);
+		text[len] = '\0';
+		VNC_DEBUG("Maximum number of disconnects: %s\n", text);
+		allowed_connections = atoi(text);
+	    }
         } else if (strncmp(options, "reverse", 7) == 0) {
             reverse = 1;
         } else if (strncmp(options, "to=", 3) == 0) {