This main goals of this project are:

1. separating L2 tables (ARP, NDP) from the L3 routing tables
2. removing as much locking dependencies among these layers as
   possible to allow for some parallelism in the search operations
3. simplify the logic in the routing code,

The most notable end result is the obsolescent of the route
cloning (RTF_CLONING) concept, which translated into code reduction
in both IPv4 ARP and IPv6 NDP related modules, and size reduction in
struct rtentry{}. The change in design obsoletes the semantics of
RTF_CLONING, RTF_WASCLONE and RTF_LLINFO routing flags. The userland
applications such as "arp" and "ndp" have been modified to reflect
those changes. The output from "netstat -r" shows only the routing
entries.

Quite a few developers have contributed to this project in the
past: Glebius Smirnoff, Luigi Rizzo, Alessandro Cerri, and
Andre Oppermann. And most recently:

- Kip Macy revised the locking code completely, thus completing
  the last piece of the puzzle, Kip has also been conducting
  active functional testing
- Sam Leffler has helped me improving/refactoring the code, and
  provided valuable reviews
- Julian Elischer setup the perforce tree for me and has helped
  me maintaining that branch before the svn conversion

1 files changed, 17 insertions, 2 deletions

diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
index 4524fdd..e5978c6 100644
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -64,6 +64,7 @@
 #include <net/ethernet.h>
 #include <net/if_bridgevar.h>
 #include <net/if_vlan_var.h>
+#include <net/if_llatbl.h>
 #include <net/pf_mtag.h>
 #include <net/vnet.h>
 
@@ -87,6 +88,7 @@
 #include <netipx/ipx.h>
 #include <netipx/ipx_if.h>
 #endif
+
 int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
 int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
 		struct sockaddr *dst, short *tp, int *hlen);
@@ -151,6 +153,7 @@ static int ether_ipfw;
 #endif
 #endif
 
+
 /*
  * Ethernet output routine.
  * Encapsulate a packet of type family for the local net.
@@ -164,6 +167,7 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
 	short type;
 	int error, hdrcmplt = 0;
 	u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN];
+	struct llentry *lle = NULL;
 	struct ether_header *eh;
 	struct pf_mtag *t;
 	int loop_copy = 1;
@@ -186,7 +190,7 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
 	switch (dst->sa_family) {
 #ifdef INET
 	case AF_INET:
-		error = arpresolve(ifp, rt0, m, dst, edst);
+		error = arpresolve(ifp, rt0, m, dst, edst, &lle);
 		if (error)
 			return (error == EWOULDBLOCK ? 0 : error);
 		type = htons(ETHERTYPE_IP);
@@ -221,7 +225,7 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
 #endif
 #ifdef INET6
 	case AF_INET6:
-		error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst);
+		error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst, &lle);
 		if (error)
 			return error;
 		type = htons(ETHERTYPE_IPV6);
@@ -289,6 +293,17 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
 		senderr(EAFNOSUPPORT);
 	}
 
+	if (lle != NULL && (lle->la_flags & LLE_IFADDR)) {
+		int csum_flags = 0;
+		if (m->m_pkthdr.csum_flags & CSUM_IP)
+			csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID);
+		if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
+			csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR);
+		m->m_pkthdr.csum_flags |= csum_flags;
+		m->m_pkthdr.csum_data = 0xffff;
+		return (if_simloop(ifp, m, dst->sa_family, 0));
+	}
+
 	/*
 	 * Add local net header.  If no space in first mbuf,
 	 * allocate another.