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net: route: Fix when route not found with dst address

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When route not found try with default router if it exists. Consider
default router as nexthop. If default router also does not exist
then drop the packet.

Change-Id: I56cc9e4a1432fc25687cbaea600bfe9cf5b1d51e
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
This commit is contained in:
Ravi kumar Veeramally 2017-03-17 17:49:20 +02:00 • committed by Jukka Rissanen
commit 1fb8b4aa74
1 changed files with 19 additions and 2 deletions
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21
subsys/net/ip/route.c
View file

@ -675,6 +675,8 @@ bool net_route_get_info(struct in6_addr *dst,
struct net_route_entry **route,
struct in6_addr **nexthop)
{
struct net_if_router *router;
*route = net_route_lookup(NULL, dst);
if (*route) {
*nexthop = net_route_get_nexthop(*route);
@ -682,6 +684,18 @@ bool net_route_get_info(struct in6_addr *dst,
return false;
}
return true;
} else {
/* No specific route to this host, use the default
* route instead.
*/
router = net_if_ipv6_router_find_default(NULL, dst);
if (!router) {
return false;
}
*nexthop = &router->address.in6_addr;
return true;
}
@ -694,7 +708,11 @@ int net_route_packet(struct net_buf *buf, struct net_route_entry *route,
struct net_linkaddr_storage *lladdr;
struct net_nbr *nbr;
nbr = net_ipv6_nbr_lookup(route->iface, nexthop);
if (route) {
net_nbuf_set_iface(buf, route->iface);
}
nbr = net_ipv6_nbr_lookup(net_nbuf_iface(buf), nexthop);
if (!nbr) {
NET_DBG("Cannot find %s neighbor.",
net_sprint_ipv6_addr(nexthop));
@ -708,7 +726,6 @@ int net_route_packet(struct net_buf *buf, struct net_route_entry *route,
return -ESRCH;
}
net_nbuf_set_iface(buf, route->iface);
net_nbuf_set_forwarding(buf, true);
/* Set the destination and source ll address in the packet.