1 files changed, 64 insertions, 0 deletions

diff --git a/meta-networking/recipes-protocols/quagga/files/lingering-IP-address-after-deletion-BZ-486.patch b/meta-networking/recipes-protocols/quagga/files/lingering-IP-address-after-deletion-BZ-486.patch
new file mode 100644
index 0000000000..42bdc20fcb
--- /dev/null
+++ b/meta-networking/recipes-protocols/quagga/files/lingering-IP-address-after-deletion-BZ-486.patch
@@ -0,0 +1,64 @@
+From 7f062c217b262e362a3362c677dea6c5e820adf1 Mon Sep 17 00:00:00 2001
+From: David Lamparter <equinox@diac24.net>
+Date: Mon, 1 Feb 2010 16:41:26 +0100
+Subject: [PATCH] zebra: lingering IP address after deletion (BZ#486)
+
+Upstream-status: Backport
+
+zebra address bookkeeping is a mess. this is just a workaround to have
+IPv4 address deletion somewhat working on Linux.
+
+the if_unset_prefix call is synchronous, when it returns success the
+address deletion completed successfully. this is either signaled by a
+netlink ACK or by an OK return value from ioctl().
+
+This version is wrapped by #ifdef HAVE_NETLINK so we don't touch the
+BSDs for now.
+
+* zebra/interface.c: On Linux, update zebra internal state after
+  deleting an address.
+
+Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
+---
+ zebra/interface.c |   21 ++++++++++++++++++---
+ 1 file changed, 18 insertions(+), 3 deletions(-)
+
+diff --git a/zebra/interface.c b/zebra/interface.c
+index 2242259..3578b79 100644
+--- a/zebra/interface.c
++++ b/zebra/interface.c
+@@ -1297,13 +1297,28 @@ ip_address_uninstall (struct vty *vty, struct interface *ifp,
+               safe_strerror(errno), VTY_NEWLINE);
+       return CMD_WARNING;
+     }
++  /* success! call returned that the address deletion went through.
++   * this is a synchronous operation, so we know it succeeded and can
++   * now update all internal state. */
++
++  /* the HAVE_NETLINK check is only here because, on BSD, although the
++   * call above is still synchronous, we get a second confirmation later
++   * through the route socket, and we don't want to touch that behaviour
++   * for now.  It should work without the #ifdef, but why take the risk...
++   * -- equinox 2012-07-13 */
++#ifdef HAVE_NETLINK
++
++  /* Remove connected route. */
++  connected_down_ipv4 (ifp, ifc);
+ 
+-#if 0
+   /* Redistribute this information. */
+   zebra_interface_address_delete_update (ifp, ifc);
+ 
+-  /* Remove connected route. */
+-  connected_down_ipv4 (ifp, ifc);
++  /* IP address propery set. */
++  UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
++
++  /* remove from interface, remark secondaries */
++  if_subnet_delete (ifp, ifc);
+ 
+   /* Free address information. */
+   listnode_delete (ifp->connected, ifc);
+-- 
+1.7.10.4
+