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[Openvpn-devel] Re: [Openvpn-users] Urgent: Limitation to 100 virtual tunnel devices??


  • Subject: [Openvpn-devel] Re: [Openvpn-users] Urgent: Limitation to 100 virtual tunnel devices??
  • From: sam <samwun@xxxxxxxxxxxxxxxx>
  • Date: Fri, 02 Jul 2004 16:09:59 +0800

Is this only specific to Linux?
how about others using BSD systems?
sam

Claas Hilbrecht wrote:

--Am Donnerstag, 1. Juli 2004 17:18 +0100 Juerg.VonBueren@xxxxxxx schrieb:

We are running into trouble with more than 100 virtual tunnel devices .
The reported problem is as follows:
Jul  1 06:30:19 1100PRVC001 openvpn[15520]: Note: Cannot ioctl TUNSETIFF


I assume you need the following patch:

diff -urN linux-2.4.26.org/net/core/dev.c linux-2.4.26/net/core/dev.c
--- linux-2.4.26.org/net/core/dev.c    Wed Apr 14 15:05:41 2004
+++ linux-2.4.26/net/core/dev.c    Thu Apr 15 18:54:01 2004
@@ -619,8 +619,12 @@

    /*
     * If you need over 100 please also fix the algorithm...
+     *
+     * Maybe it's never needed but just to be sure we allow
+     * up to 1000 tun/tap devices.
+     *
     */
-    for (i = 0; i < 100; i++) {
+    for (i = 0; i < 1000; i++) {
        snprintf(buf,sizeof(buf),name,i);
        if (__dev_get_by_name(buf) == NULL) {
            strcpy(dev->name, buf);




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