diff options
| author | Christian Franke <chris@opensourcerouting.org> | 2013-01-24 14:04:48 +0000 |
|---|---|---|
| committer | David Lamparter <equinox@opensourcerouting.org> | 2013-09-19 17:51:16 +0200 |
| commit | f7f740fe58fb838fc87e82dc7e1e2d4e5ccf085c (patch) | |
| tree | 5f3d9c866aaf7f8f23aaa5956eb7323d49ef472f /lib | |
| parent | c7df92de2dc91d0a934cf892e543728cb1a10849 (diff) | |
zebra: add ZEBRA_IFC_QUEUED to keep track of kernel state
As there are timeframes when we don't get a notification from the kernel
about new addresses. (e.g. while Linux performs IPv6 DAD), we need to
have some information whether an address has been sent to the kernel or
not.
One case where this is relevant would be a user adding an IPv6 address,
but deleting it before DAD has been complete. With the next patch which
removes some (ill assuming) synchronous parts in address setup,
ipv6_address_uninstall would not know whether or not it has to actually
delete the prefix from the kernel. Resolving these windows where we lack
information is what the flag ZEBRA_IFC_QUEUED is intended for.
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/if.h | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -151,11 +151,16 @@ struct connected u_char conf; #define ZEBRA_IFC_REAL (1 << 0) #define ZEBRA_IFC_CONFIGURED (1 << 1) +#define ZEBRA_IFC_QUEUED (1 << 2) /* The ZEBRA_IFC_REAL flag should be set if and only if this address - exists in the kernel. + exists in the kernel and is actually usable. (A case where it exists but + is not yet usable would be IPv6 with DAD) The ZEBRA_IFC_CONFIGURED flag should be set if and only if this address was configured by the user from inside quagga. + The ZEBRA_IFC_QUEUED flag should be set if and only if the address exists + in the kernel. It may and should be set although the address might not be + usable yet. (compare with ZEBRA_IFC_REAL) */ /* Flags for connected address. */ |