diff options
| -rw-r--r-- | drivers/net/vxlan.c | 82 | ||||
| -rw-r--r-- | include/net/addrconf.h | 4 | ||||
| -rw-r--r-- | include/net/ndisc.h | 5 | ||||
| -rw-r--r-- | net/ipv6/af_inet6.c | 2 | ||||
| -rw-r--r-- | net/ipv6/ndisc.c | 8 |
5 files changed, 95 insertions, 6 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index c833763fe5c4..3ffb22d684a9 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -1196,6 +1196,70 @@ out: return NETDEV_TX_OK; } +#if IS_ENABLED(CONFIG_IPV6) +static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) +{ + struct vxlan_dev *vxlan = netdev_priv(dev); + struct neighbour *n; + union vxlan_addr ipa; + const struct ipv6hdr *iphdr; + const struct in6_addr *saddr, *daddr; + struct nd_msg *msg; + struct inet6_dev *in6_dev = NULL; + + in6_dev = __in6_dev_get(dev); + if (!in6_dev) + goto out; + + if (!pskb_may_pull(skb, skb->len)) + goto out; + + iphdr = ipv6_hdr(skb); + saddr = &iphdr->saddr; + daddr = &iphdr->daddr; + + if (ipv6_addr_loopback(daddr) || + ipv6_addr_is_multicast(daddr)) + goto out; + + msg = (struct nd_msg *)skb_transport_header(skb); + if (msg->icmph.icmp6_code != 0 || + msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) + goto out; + + n = neigh_lookup(ipv6_stub->nd_tbl, daddr, dev); + + if (n) { + struct vxlan_fdb *f; + + if (!(n->nud_state & NUD_CONNECTED)) { + neigh_release(n); + goto out; + } + + f = vxlan_find_mac(vxlan, n->ha); + if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { + /* bridge-local neighbor */ + neigh_release(n); + goto out; + } + + ipv6_stub->ndisc_send_na(dev, n, saddr, &msg->target, + !!in6_dev->cnf.forwarding, + true, false, false); + neigh_release(n); + } else if (vxlan->flags & VXLAN_F_L3MISS) { + ipa.sin6.sin6_addr = *daddr; + ipa.sa.sa_family = AF_INET6; + vxlan_ip_miss(dev, &ipa); + } + +out: + consume_skb(skb); + return NETDEV_TX_OK; +} +#endif + static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) { struct vxlan_dev *vxlan = netdev_priv(dev); @@ -1677,8 +1741,22 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) skb_reset_mac_header(skb); eth = eth_hdr(skb); - if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP) - return arp_reduce(dev, skb); + if ((vxlan->flags & VXLAN_F_PROXY)) { + if (ntohs(eth->h_proto) == ETH_P_ARP) + return arp_reduce(dev, skb); +#if IS_ENABLED(CONFIG_IPV6) + else if (ntohs(eth->h_proto) == ETH_P_IPV6 && + skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) && + ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { + struct nd_msg *msg; + + msg = (struct nd_msg *)skb_transport_header(skb); + if (msg->icmph.icmp6_code == 0 && + msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) + return neigh_reduce(dev, skb); + } +#endif + } f = vxlan_find_mac(vxlan, eth->h_dest); did_rsc = false; diff --git a/include/net/addrconf.h b/include/net/addrconf.h index bcf957341b62..fb314de2b61b 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -153,6 +153,10 @@ struct ipv6_stub { int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6); void (*udpv6_encap_enable)(void); + void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh, + const struct in6_addr *daddr, + const struct in6_addr *solicited_addr, + bool router, bool solicited, bool override, bool inc_opt); struct neigh_table *nd_tbl; }; extern const struct ipv6_stub *ipv6_stub __read_mostly; diff --git a/include/net/ndisc.h b/include/net/ndisc.h index 6fea32340ae8..3c4211f0bed6 100644 --- a/include/net/ndisc.h +++ b/include/net/ndisc.h @@ -204,6 +204,11 @@ extern void ndisc_send_ns(struct net_device *dev, extern void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr, const struct in6_addr *daddr); +extern void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, + const struct in6_addr *daddr, + const struct in6_addr *solicited_addr, + bool router, bool solicited, bool override, + bool inc_opt); extern void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target); diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 1996a7c34f73..136fe55c1a47 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -56,6 +56,7 @@ #include <net/transp_v6.h> #include <net/ip6_route.h> #include <net/addrconf.h> +#include <net/ndisc.h> #ifdef CONFIG_IPV6_TUNNEL #include <net/ip6_tunnel.h> #endif @@ -815,6 +816,7 @@ static const struct ipv6_stub ipv6_stub_impl = { .ipv6_sock_mc_drop = ipv6_sock_mc_drop, .ipv6_dst_lookup = ip6_dst_lookup, .udpv6_encap_enable = udpv6_encap_enable, + .ndisc_send_na = ndisc_send_na, .nd_tbl = &nd_tbl, }; diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index bb6fd95a5cd1..14bd2f9d9dbb 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -461,10 +461,10 @@ static void ndisc_send_skb(struct sk_buff *skb, rcu_read_unlock(); } -static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, - const struct in6_addr *daddr, - const struct in6_addr *solicited_addr, - bool router, bool solicited, bool override, bool inc_opt) +void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, + const struct in6_addr *daddr, + const struct in6_addr *solicited_addr, + bool router, bool solicited, bool override, bool inc_opt) { struct sk_buff *skb; struct in6_addr tmpaddr; |