diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-02-10 18:47:08 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-02-13 19:55:32 -0800 |
| commit | 545dbcd124b02c9dc93c8a5894c71d682effc3e6 (patch) | |
| tree | a8a76e9fc7abe40f9dc98c8752945285e3a7e18a /net/ipv6/ndisc.c | |
| parent | 30c89bad3ea2ef7a2d4686f9c3cc08420fe627bc (diff) | |
ipv6: icmp6: add drop reason support to ndisc_rcv()
Creates three new drop reasons:
SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc).
SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit.
SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/ndisc.c')
| -rw-r--r-- | net/ipv6/ndisc.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 3a553494ff16..9548b5a44714 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1804,15 +1804,16 @@ static bool ndisc_suppress_frag_ndisc(struct sk_buff *skb) return false; } -int ndisc_rcv(struct sk_buff *skb) +enum skb_drop_reason ndisc_rcv(struct sk_buff *skb) { struct nd_msg *msg; + SKB_DR(reason); if (ndisc_suppress_frag_ndisc(skb)) - return 0; + return SKB_DROP_REASON_IPV6_NDISC_FRAG; if (skb_linearize(skb)) - return 0; + return SKB_DROP_REASON_NOMEM; msg = (struct nd_msg *)skb_transport_header(skb); @@ -1821,13 +1822,13 @@ int ndisc_rcv(struct sk_buff *skb) if (ipv6_hdr(skb)->hop_limit != 255) { ND_PRINTK(2, warn, "NDISC: invalid hop-limit: %d\n", ipv6_hdr(skb)->hop_limit); - return 0; + return SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT; } if (msg->icmph.icmp6_code != 0) { ND_PRINTK(2, warn, "NDISC: invalid ICMPv6 code: %d\n", msg->icmph.icmp6_code); - return 0; + return SKB_DROP_REASON_IPV6_NDISC_BAD_CODE; } switch (msg->icmph.icmp6_type) { @@ -1853,7 +1854,7 @@ int ndisc_rcv(struct sk_buff *skb) break; } - return 0; + return reason; } static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) |