Changeset 61000 in vbox

Timestamp:

May 17, 2016 12:08:55 PM (9 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

107252

Message:

NAT: Initialize guest address guess for the port-forwarding to
CTL_GUEST. This is strictly an improvement since it helps the common
case and doesn't affect corner cases, which will still need a sign of
life packet just like before.

When a VM is restored we do flap the link for 5 seconds to make guest
reacquire the DHCP lease, but from the guest PoV that flap may be
shorter and sometimes it just ignores it, preventing port-forwarding
from working. ticketref:15412

File:

• trunk/src/VBox/Devices/Network/slirp/slirp.c (modified) (1 diff)

trunk/src/VBox/Devices/Network/slirp/slirp.c

@@ -375 +375 @@
     /* @todo: add ability to configure this staff */
 
+    /*
+     * Some guests won't reacquire DHCP lease on link flap when VM is
+     * restored.  Instead of forcing users to explicitly set CTL_GUEST
+     * in port-forwarding rules, provide it as initial guess here.
+     */
+    slirp_update_guest_addr_guess(pData,
+                                  pData->special_addr.s_addr | RT_H2N_U32_C(CTL_GUEST),
+                                  "initialization");
+
     /* set default addresses */
     inet_aton("127.0.0.1", &loopback_addr);