diff options
Diffstat (limited to 'drivers/net/vxlan.c')
| -rw-r--r-- | drivers/net/vxlan.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index afdc65fd5bc5..c1587ece28cf 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2337,6 +2337,46 @@ static int vxlan_change_mtu(struct net_device *dev, int new_mtu) return 0; } +static int egress_ipv4_tun_info(struct net_device *dev, struct sk_buff *skb, + struct ip_tunnel_info *info, + __be16 sport, __be16 dport) +{ + struct vxlan_dev *vxlan = netdev_priv(dev); + struct rtable *rt; + struct flowi4 fl4; + + memset(&fl4, 0, sizeof(fl4)); + fl4.flowi4_tos = RT_TOS(info->key.tos); + fl4.flowi4_mark = skb->mark; + fl4.flowi4_proto = IPPROTO_UDP; + fl4.daddr = info->key.u.ipv4.dst; + + rt = ip_route_output_key(vxlan->net, &fl4); + if (IS_ERR(rt)) + return PTR_ERR(rt); + ip_rt_put(rt); + + info->key.u.ipv4.src = fl4.saddr; + info->key.tp_src = sport; + info->key.tp_dst = dport; + return 0; +} + +static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) +{ + struct vxlan_dev *vxlan = netdev_priv(dev); + struct ip_tunnel_info *info = skb_tunnel_info(skb); + __be16 sport, dport; + + sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, + vxlan->cfg.port_max, true); + dport = info->key.tp_dst ? : vxlan->cfg.dst_port; + + if (ip_tunnel_info_af(info) == AF_INET) + return egress_ipv4_tun_info(dev, skb, info, sport, dport); + return -EINVAL; +} + static const struct net_device_ops vxlan_netdev_ops = { .ndo_init = vxlan_init, .ndo_uninit = vxlan_uninit, @@ -2351,6 +2391,7 @@ static const struct net_device_ops vxlan_netdev_ops = { .ndo_fdb_add = vxlan_fdb_add, .ndo_fdb_del = vxlan_fdb_delete, .ndo_fdb_dump = vxlan_fdb_dump, + .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, }; /* Info for udev, that this is a virtual tunnel endpoint */ |