Author: melifaro
Date: Sat Sep 19 11:50:02 2015
New Revision: 287985
URL: https://svnweb.freebsd.org/changeset/base/287985
Log:
Cleanup nd6_cache_lladdr(). No functional changes.
* Since new extries are now allocated explicitly, fill in
all the necessary fields for lle _before_ attaching it to the table.
* Remove ND6_LLINFO_INCOMPLETE check which was unused even in
first KAME merge (r53541).
* After that, the only new state that function can set, was
ND6_LLINFO_STALE. Given everything above, simplify logic besides
do_update and is_newentry.
* Fix nd_resolve() comment.
Modified:
head/sys/netinet6/nd6.c
Modified: head/sys/netinet6/nd6.c
==============================================================================
--- head/sys/netinet6/nd6.c Sat Sep 19 03:58:31 2015 (r287984)
+++ head/sys/netinet6/nd6.c Sat Sep 19 11:50:02 2015 (r287985)
@@ -1689,7 +1689,6 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
int olladdr;
int llchange;
int flags;
- int newstate = 0;
uint16_t router = 0;
struct sockaddr_in6 sin6;
struct mbuf *chain = NULL;
@@ -1722,6 +1721,16 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
ln = nd6_alloc(from, 0, ifp);
if (ln == NULL)
return;
+
+ /*
+ * Since we already know all the data for the new entry,
+ * fill it before insertion.
+ */
+ if (lladdr != NULL) {
+ bcopy(lladdr, &ln->ll_addr, ifp->if_addrlen);
+ ln->la_flags |= LLE_VALID;
+ ln->ln_state = ND6_LLINFO_STALE;
+ }
IF_AFDATA_WLOCK(ifp);
LLE_WLOCK(ln);
/* Prefer any existing lle over newly-created one */
@@ -1767,6 +1776,10 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
* 1 -- y -- (7) * STALE
*/
+ do_update = 0;
+ if (!is_newentry && llchange != 0)
+ do_update = 1; /* (3,5) */
+
if (lladdr) { /* (3-5) and (7) */
/*
* Record source link-layer address
@@ -1774,35 +1787,13 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
*/
bcopy(lladdr, &ln->ll_addr, ifp->if_addrlen);
ln->la_flags |= LLE_VALID;
- EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
- }
+ ln->ln_state = ND6_LLINFO_STALE;
- if (!is_newentry) {
- if (llchange != 0) { /* (3,5) */
- do_update = 1;
- newstate = ND6_LLINFO_STALE;
- } else /* (1-2,4) */
- do_update = 0;
- } else {
- do_update = 1;
- if (lladdr == NULL) /* (6) */
- newstate = ND6_LLINFO_NOSTATE;
- else /* (7) */
- newstate = ND6_LLINFO_STALE;
- }
-
- if (do_update) {
- /*
- * Update the state of the neighbor cache.
- */
- ln->ln_state = newstate;
+ EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
- if (ln->ln_state == ND6_LLINFO_STALE) {
+ if (do_update) {
if (ln->la_hold != NULL)
nd6_grab_holdchain(ln, &chain, &sin6);
- } else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) {
- /* probe right away */
- nd6_llinfo_settimer_locked((void *)ln, 0);
}
}
@@ -1838,7 +1829,7 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
* for those are not autoconfigured hosts, we explicitly avoid such
* cases for safety.
*/
- if (do_update && router &&
+ if ((do_update || is_newentry) && router &&
ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
/*
* guaranteed recursion
@@ -2005,7 +1996,7 @@ nd6_resolve(struct ifnet *ifp, int is_gw
/*
* Perform fast path for the following cases:
* 1) lle state is REACHABLE
- * 2) lle state is DELAY (NS message sentNS message sent)
+ * 2) lle state is DELAY (NS message sent)
*
* Every other case involves lle modification, so we handle
* them separately.
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