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Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c53
1 files changed, 41 insertions, 12 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index b50055b9278..0304b5fe8d6 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -62,6 +62,7 @@
#include <linux/sysctl.h>
#endif
+#include <linux/if_addr.h>
#include <linux/if_arp.h>
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
@@ -411,7 +412,8 @@ static void pndisc_destructor(struct pneigh_entry *n)
*/
static inline void ndisc_flow_init(struct flowi *fl, u8 type,
- struct in6_addr *saddr, struct in6_addr *daddr)
+ struct in6_addr *saddr, struct in6_addr *daddr,
+ int oif)
{
memset(fl, 0, sizeof(*fl));
ipv6_addr_copy(&fl->fl6_src, saddr);
@@ -419,6 +421,8 @@ static inline void ndisc_flow_init(struct flowi *fl, u8 type,
fl->proto = IPPROTO_ICMPV6;
fl->fl_icmp_type = type;
fl->fl_icmp_code = 0;
+ fl->oif = oif;
+ security_sk_classify_flow(ndisc_socket->sk, fl);
}
static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
@@ -450,7 +454,8 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
src_addr = &tmpaddr;
}
- ndisc_flow_init(&fl, NDISC_NEIGHBOUR_ADVERTISEMENT, src_addr, daddr);
+ ndisc_flow_init(&fl, NDISC_NEIGHBOUR_ADVERTISEMENT, src_addr, daddr,
+ dev->ifindex);
dst = ndisc_dst_alloc(dev, neigh, daddr, ip6_output);
if (!dst)
@@ -491,7 +496,7 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
msg->icmph.icmp6_unused = 0;
msg->icmph.icmp6_router = router;
msg->icmph.icmp6_solicited = solicited;
- msg->icmph.icmp6_override = !!override;
+ msg->icmph.icmp6_override = override;
/* Set the target address. */
ipv6_addr_copy(&msg->target, solicited_addr);
@@ -540,7 +545,8 @@ void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
saddr = &addr_buf;
}
- ndisc_flow_init(&fl, NDISC_NEIGHBOUR_SOLICITATION, saddr, daddr);
+ ndisc_flow_init(&fl, NDISC_NEIGHBOUR_SOLICITATION, saddr, daddr,
+ dev->ifindex);
dst = ndisc_dst_alloc(dev, neigh, daddr, ip6_output);
if (!dst)
@@ -615,7 +621,8 @@ void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr,
int len;
int err;
- ndisc_flow_init(&fl, NDISC_ROUTER_SOLICITATION, saddr, daddr);
+ ndisc_flow_init(&fl, NDISC_ROUTER_SOLICITATION, saddr, daddr,
+ dev->ifindex);
dst = ndisc_dst_alloc(dev, NULL, daddr, ip6_output);
if (!dst)
@@ -729,8 +736,10 @@ static void ndisc_recv_ns(struct sk_buff *skb)
struct inet6_ifaddr *ifp;
struct inet6_dev *idev = NULL;
struct neighbour *neigh;
+ struct pneigh_entry *pneigh = NULL;
int dad = ipv6_addr_any(saddr);
int inc;
+ int is_router;
if (ipv6_addr_is_multicast(&msg->target)) {
ND_PRINTK2(KERN_WARNING
@@ -815,7 +824,9 @@ static void ndisc_recv_ns(struct sk_buff *skb)
if (ipv6_chk_acast_addr(dev, &msg->target) ||
(idev->cnf.forwarding &&
- pneigh_lookup(&nd_tbl, &msg->target, dev, 0))) {
+ (ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) &&
+ (pneigh = pneigh_lookup(&nd_tbl,
+ &msg->target, dev, 0)) != NULL)) {
if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) &&
skb->pkt_type != PACKET_HOST &&
inc != 0 &&
@@ -836,12 +847,14 @@ static void ndisc_recv_ns(struct sk_buff *skb)
goto out;
}
+ is_router = !!(pneigh ? pneigh->flags & NTF_ROUTER : idev->cnf.forwarding);
+
if (dad) {
struct in6_addr maddr;
ipv6_addr_all_nodes(&maddr);
ndisc_send_na(dev, NULL, &maddr, &msg->target,
- idev->cnf.forwarding, 0, (ifp != NULL), 1);
+ is_router, 0, (ifp != NULL), 1);
goto out;
}
@@ -862,7 +875,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
NEIGH_UPDATE_F_OVERRIDE);
if (neigh || !dev->hard_header) {
ndisc_send_na(dev, neigh, saddr, &msg->target,
- idev->cnf.forwarding,
+ is_router,
1, (ifp != NULL && inc), inc);
if (neigh)
neigh_release(neigh);
@@ -945,6 +958,20 @@ static void ndisc_recv_na(struct sk_buff *skb)
if (neigh->nud_state & NUD_FAILED)
goto out;
+ /*
+ * Don't update the neighbor cache entry on a proxy NA from
+ * ourselves because either the proxied node is off link or it
+ * has already sent a NA to us.
+ */
+ if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) &&
+ ipv6_devconf.forwarding && ipv6_devconf.proxy_ndp &&
+ pneigh_lookup(&nd_tbl, &msg->target, dev, 0)) {
+ /* XXX: idev->cnf.prixy_ndp */
+ WARN_ON(skb->dst != NULL &&
+ ((struct rt6_info *)skb->dst)->rt6i_idev);
+ goto out;
+ }
+
neigh_update(neigh, lladdr,
msg->icmph.icmp6_solicited ? NUD_REACHABLE : NUD_STALE,
NEIGH_UPDATE_F_WEAK_OVERRIDE|
@@ -959,7 +986,7 @@ static void ndisc_recv_na(struct sk_buff *skb)
struct rt6_info *rt;
rt = rt6_get_dflt_router(saddr, dev);
if (rt)
- ip6_del_rt(rt, NULL, NULL, NULL);
+ ip6_del_rt(rt);
}
out:
@@ -1112,7 +1139,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
if (rt && lifetime == 0) {
neigh_clone(neigh);
- ip6_del_rt(rt, NULL, NULL, NULL);
+ ip6_del_rt(rt);
rt = NULL;
}
@@ -1344,7 +1371,8 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
neigh = __neigh_lookup(&nd_tbl, target, skb->dev, 1);
if (neigh) {
- rt6_redirect(dest, &skb->nh.ipv6h->saddr, neigh, lladdr,
+ rt6_redirect(dest, &skb->nh.ipv6h->daddr,
+ &skb->nh.ipv6h->saddr, neigh, lladdr,
on_link);
neigh_release(neigh);
}
@@ -1380,7 +1408,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
return;
}
- ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &skb->nh.ipv6h->saddr);
+ ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &skb->nh.ipv6h->saddr,
+ dev->ifindex);
dst = ip6_route_output(NULL, &fl);
if (dst == NULL)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 15:26:49 +0000