@@ -449,6 +449,11 @@ sitnl_route_save(struct nlmsghdr *n, void *arg)
while (RTA_OK(rta, len))
{
+#ifdef RTA_MULTIPATH
+ struct rtnexthop *nh;
+ int nhlen;
+#endif
+
switch (rta->rta_type)
{
/* route interface */
@@ -469,6 +474,38 @@ sitnl_route_save(struct nlmsghdr *n, void *arg)
case RTA_TABLE:
table = *(unsigned int *)RTA_DATA(rta);
break;
+
+#ifdef RTA_MULTIPATH
+ /* multipath nexthops */
+ case RTA_MULTIPATH:
+ nh = RTA_DATA(rta);
+ nhlen = RTA_PAYLOAD(rta);
+
+ while (RTNH_OK(nh, nhlen))
+ {
+ struct rtattr *nha = RTNH_DATA(nh);
+ int nhalen = nh->rtnh_len - sizeof(*nh);
+
+ /* route interface */
+ ifindex = nh->rtnh_ifindex;
+
+ while (RTA_OK(nha, nhalen))
+ {
+ switch (nha->rta_type)
+ {
+ /* GW for the route */
+ case RTA_GATEWAY:
+ memcpy(&res->gw, RTA_DATA(nha), res->addr_size);
+ break;
+ }
+
+ nha = RTA_NEXT(nha, nhalen);
+ }
+
+ nh = RTNH_NEXT(nh);
+ }
+ break;
+#endif
}
rta = RTA_NEXT(rta, len);
Load balancing setup over multiple upstreams may include multipath gateway route, which is not not supported by OpenVPN. Let's add basic support for that for selecting best route for zero destignation address - use any one of nexthop addresses as a gateway, weights are not handled. Setup example: ip route add default \ nexthop via 192.168.1.1 dev eth1 weight 1 \ nexthop via 192.168.2.1 dev eth2 weight 1 Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru> --- src/openvpn/networking_sitnl.c | 37 ++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+)