diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-02-16 16:28:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-02-20 08:54:23 +0000 |
| commit | c34b8bb11ebc135e970653bd6fc8e3f863fb6a81 (patch) | |
| tree | ef1b9c3f83a0573e50cc31d5dcaf7687267ef837 | |
| parent | 784d4477f07b930df73bc77e842e03f1dacb83aa (diff) | |
ipv6: icmp6: add SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST
Hosts can often receive neighbour discovery messages
that are not for them.
Use a dedicated drop reason to make clear the packet is dropped
for this normal case.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/dropreason.h | 5 | ||||
| -rw-r--r-- | net/ipv6/ndisc.c | 4 |
2 files changed, 8 insertions, 1 deletions
diff --git a/include/net/dropreason.h b/include/net/dropreason.h index 239a5c0ea83e..c0a3ea806cd5 100644 --- a/include/net/dropreason.h +++ b/include/net/dropreason.h @@ -77,6 +77,7 @@ FN(IPV6_NDISC_HOP_LIMIT) \ FN(IPV6_NDISC_BAD_CODE) \ FN(IPV6_NDISC_BAD_OPTIONS) \ + FN(IPV6_NDISC_NS_OTHERHOST) \ FNe(MAX) /** @@ -333,6 +334,10 @@ enum skb_drop_reason { SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, + /** @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION + * for another host. + */ + SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, /** * @SKB_DROP_REASON_MAX: the maximum of drop reason, which shouldn't be * used as a real 'reason' diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index b47e845d66eb..c4be62c99f73 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -921,8 +921,10 @@ have_ifp: pneigh_enqueue(&nd_tbl, idev->nd_parms, n); goto out; } - } else + } else { + SKB_DR_SET(reason, IPV6_NDISC_NS_OTHERHOST); goto out; + } } if (is_router < 0) |