[PATCH] add new function to provide neighbour event parsing

[Brett Ciphery]

the neighbour parsing function was previously not accessible, so
custom callback functions had to handle the decoding itself.
rtnl_neigh_parse is introduced and implemented in much the same way
as rtnl_route_parse.

Signed-off-by: Brett Ciphery <brett.ciphery at windriver.com>
---
 include/netlink/route/neighbour.h |    2 ++
 lib/route/neigh.c                 |   19 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletions(-)

diff --git a/include/netlink/route/neighbour.h b/include/netlink/route/neighbour.h
index 698539a..1d1179b 100644
--- a/include/netlink/route/neighbour.h
+++ b/include/netlink/route/neighbour.h
@@ -29,6 +29,8 @@ extern int	rtnl_neigh_alloc_cache(struct nl_sock *, struct nl_cache **);
 extern struct rtnl_neigh *rtnl_neigh_get(struct nl_cache *, int,
 					       struct nl_addr *);
 
+extern int      rtnl_neigh_parse(struct nlmsghdr *, struct rtnl_neigh **);
+
 extern char *	rtnl_neigh_state2str(int, char *, size_t);
 extern int	rtnl_neigh_str2state(const char *);
 
diff --git a/lib/route/neigh.c b/lib/route/neigh.c
index 7985d34..bb61571 100644
--- a/lib/route/neigh.c
+++ b/lib/route/neigh.c
@@ -254,6 +254,21 @@ static int neigh_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
 			    struct nlmsghdr *n, struct nl_parser_param *pp)
 {
 	struct rtnl_neigh *neigh;
+	int err;
+
+	if ((err = rtnl_neigh_parse(n, &neigh)) < 0)
+		return err;
+
+	err = pp->pp_cb((struct nl_object *) neigh, pp);
+
+	rtnl_neigh_put(neigh);
+	return err;
+}
+
+
+int rtnl_neigh_parse(struct nlmsghdr *n, struct rtnl_neigh **result)
+{
+	struct rtnl_neigh *neigh;
 	struct nlattr *tb[NDA_MAX + 1];
 	struct ndmsg *nm;
 	int err;
@@ -317,7 +332,9 @@ static int neigh_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
 		neigh->ce_mask |= NEIGH_ATTR_PROBES;
 	}
 
-	err = pp->pp_cb((struct nl_object *) neigh, pp);
+	*result = neigh;
+	return 0;
+
 errout:
 	rtnl_neigh_put(neigh);
 	return err;
-- 
1.7.0.4