A major overhaul of the CARP implementation. The ip_carp.c was started

from scratch, copying needed functionality from the old implemenation
on demand, with a thorough review of all code. The main change is that
interface layer has been removed from the CARP. Now redundant addresses
are configured exactly on the interfaces, they run on.

The CARP configuration itself is, as before, configured and read via
SIOCSVH/SIOCGVH ioctls. A new prefix created with SIOCAIFADDR or
SIOCAIFADDR_IN6 may now be configured to a particular virtual host id,
which makes the prefix redundant.

ifconfig(8) semantics has been changed too: now one doesn't need
to clone carpXX interface, he/she should directly configure a vhid
on a Ethernet interface.

To supply vhid data from the kernel to an application the getifaddrs(8)
function had been changed to pass ifam_data with each address. [1]

The new implementation definitely closes all PRs related to carp(4)
being an interface, and may close several others. It also allows
to run a single redundant IP per interface.

Big thanks to Bjoern Zeeb for his help with inet6 part of patch, for
idea on using ifam_data and for several rounds of reviewing!

PR:		kern/117000, kern/126945, kern/126714, kern/120130, kern/117448
Reviewed by:	bz
Submitted by:	bz [1]

1 files changed, 0 insertions, 1 deletions

diff --git a/sys/net/if_types.h b/sys/net/if_types.h
index c2effacd7d0c..fe6ab5ea16b3 100644
--- a/sys/net/if_types.h
+++ b/sys/net/if_types.h
@@ -250,6 +250,5 @@
 #define	IFT_ENC		0xf4
 #define	IFT_PFLOG	0xf6
 #define	IFT_PFSYNC	0xf7
-#define	IFT_CARP	0xf8	/* Common Address Redundancy Protocol */
 #define IFT_IPXIP	0xf9	/* IPX over IP tunneling; no longer used. */
 #endif /* !_NET_IF_TYPES_H_ */