svn commit: r245932 - head/sys/netinet

[Navdeep Parhar]

Author: np
Date: Sat Jan 26 00:57:29 2013
New Revision: 245932
URL: http://svnweb.freebsd.org/changeset/base/245932

Log:
  Teach toe_l2_resolve to resolve IPv6 destinations too.
  
  Reviewed by:	bz@

Modified:
  head/sys/netinet/toecore.c

Modified: head/sys/netinet/toecore.c
==============================================================================
--- head/sys/netinet/toecore.c	Sat Jan 26 00:41:54 2013	(r245931)
+++ head/sys/netinet/toecore.c	Sat Jan 26 00:57:29 2013	(r245932)
@@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
 #include <netinet/in.h>
 #include <netinet/in_pcb.h>
 #include <netinet/in_var.h>
+#include <netinet6/in6_var.h>
 #include <netinet6/in6_pcb.h>
 #include <netinet6/nd6.h>
 #define TCPSTATES
@@ -444,6 +445,68 @@ toe_route_redirect_event(void *arg __unu
 	return;
 }
 
+#ifdef INET6
+/*
+ * XXX: no checks to verify that sa is really a neighbor because we assume it is
+ * the result of a route lookup and is on-link on the given ifp.
+ */
+static int
+toe_nd6_resolve(struct ifnet *ifp, struct sockaddr *sa, uint8_t *lladdr)
+{
+	struct llentry *lle;
+	struct sockaddr_in6 *sin6 = (void *)sa;
+	int rc, flags = 0;
+
+restart:
+	IF_AFDATA_RLOCK(ifp);
+	lle = lla_lookup(LLTABLE6(ifp), flags, sa);
+	IF_AFDATA_RUNLOCK(ifp);
+	if (lle == NULL) {
+		IF_AFDATA_LOCK(ifp);
+		lle = nd6_lookup(&sin6->sin6_addr, ND6_CREATE | ND6_EXCLUSIVE,
+		    ifp);
+		IF_AFDATA_UNLOCK(ifp);
+		if (lle == NULL)
+			return (ENOMEM); /* Couldn't create entry in cache. */
+		lle->ln_state = ND6_LLINFO_INCOMPLETE;
+		nd6_llinfo_settimer_locked(lle,
+		    (long)ND_IFINFO(ifp)->retrans * hz / 1000);
+		LLE_WUNLOCK(lle);
+
+		nd6_ns_output(ifp, NULL, &sin6->sin6_addr, NULL, 0);
+
+		return (EWOULDBLOCK);
+	}
+
+	if (lle->ln_state == ND6_LLINFO_STALE) {
+		if ((flags & LLE_EXCLUSIVE) == 0) {
+			LLE_RUNLOCK(lle);
+			flags |= LLE_EXCLUSIVE;
+			goto restart;
+		}
+
+		LLE_WLOCK_ASSERT(lle);
+
+		lle->la_asked = 0;
+		lle->ln_state = ND6_LLINFO_DELAY;
+		nd6_llinfo_settimer_locked(lle, (long)V_nd6_delay * hz);
+	}
+
+	if (lle->la_flags & LLE_VALID) {
+		memcpy(lladdr, &lle->ll_addr, ifp->if_addrlen);
+		rc = 0;
+	} else
+		rc = EWOULDBLOCK;
+
+	if (flags & LLE_EXCLUSIVE)
+		LLE_WUNLOCK(lle);
+	else
+		LLE_RUNLOCK(lle);
+
+	return (rc);
+}
+#endif
+
 /*
  * Returns 0 or EWOULDBLOCK on success (any other value is an error).  0 means
  * lladdr and vtag are valid on return, EWOULDBLOCK means the TOE driver's
@@ -453,7 +516,9 @@ int
 toe_l2_resolve(struct toedev *tod, struct ifnet *ifp, struct sockaddr *sa,
     uint8_t *lladdr, uint16_t *vtag)
 {
+#ifdef INET
 	struct llentry *lle;
+#endif
 	int rc;
 
 	switch (sa->sa_family) {
@@ -464,7 +529,7 @@ toe_l2_resolve(struct toedev *tod, struc
 #endif
 #ifdef INET6
 	case AF_INET6:
-		rc = nd6_storelladdr(ifp, NULL, sa, lladdr, &lle);
+		rc = toe_nd6_resolve(ifp, sa, lladdr);
 		break;
 #endif
 	default: