mctp: Add dest neighbour lladdr to route output

Now that we have a neighbour implementation, hook it up to the output
path to set the dest hardware address for outgoing packets.

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/mctp/route.c b/net/mctp/route.c
index 160220e..38f0a72 100644 (file)
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -376,6 +376,9 @@ static unsigned int mctp_route_mtu(struct mctp_route *rt)
 
 static int mctp_route_output(struct mctp_route *route, struct sk_buff *skb)
 {
+       struct mctp_hdr *hdr = mctp_hdr(skb);
+       char daddr_buf[MAX_ADDR_LEN];
+       char *daddr = NULL;
        unsigned int mtu;
        int rc;
 
@@ -387,9 +390,12 @@ static int mctp_route_output(struct mctp_route *route, struct sk_buff *skb)
                return -EMSGSIZE;
        }
 
-       /* TODO: daddr (from rt->neigh), saddr (from device?)  */
+       /* If lookup fails let the device handle daddr==NULL */
+       if (mctp_neigh_lookup(route->dev, hdr->dest, daddr_buf) == 0)
+               daddr = daddr_buf;
+
        rc = dev_hard_header(skb, skb->dev, ntohs(skb->protocol),
-                            NULL, NULL, skb->len);
+                            daddr, skb->dev->dev_addr, skb->len);
        if (rc) {
                kfree_skb(skb);
                return -EHOSTUNREACH;