diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-02-16 16:28:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-02-20 08:54:23 +0000 |
| commit | 243e37c642ac1d52858bc5f3559e380babf21169 (patch) | |
| tree | fb46c8500cb2d08c213345d46ee154997e83f451 /net/ipv6/ndisc.c | |
| parent | 3009f9ae21ec539985977dcaa0cebb628afeb181 (diff) | |
ipv6: icmp6: add drop reason support to ndisc_recv_rs()
Change ndisc_recv_rs() to return a drop reason.
For the moment, return PKT_TOO_SMALL, NOT_SPECIFIED
or SKB_CONSUMED. More reasons are added later.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ndisc.c')
| -rw-r--r-- | net/ipv6/ndisc.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 9354cb3669c8..514eb8cc7879 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1127,7 +1127,7 @@ out: return reason; } -static void ndisc_recv_rs(struct sk_buff *skb) +static enum skb_drop_reason ndisc_recv_rs(struct sk_buff *skb) { struct rs_msg *rs_msg = (struct rs_msg *)skb_transport_header(skb); unsigned long ndoptlen = skb->len - sizeof(*rs_msg); @@ -1136,14 +1136,15 @@ static void ndisc_recv_rs(struct sk_buff *skb) const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; struct ndisc_options ndopts; u8 *lladdr = NULL; + SKB_DR(reason); if (skb->len < sizeof(*rs_msg)) - return; + return SKB_DROP_REASON_PKT_TOO_SMALL; idev = __in6_dev_get(skb->dev); if (!idev) { ND_PRINTK(1, err, "RS: can't find in6 device\n"); - return; + return reason; } /* Don't accept RS if we're not in router mode */ @@ -1178,9 +1179,10 @@ static void ndisc_recv_rs(struct sk_buff *skb) NEIGH_UPDATE_F_OVERRIDE_ISROUTER, NDISC_ROUTER_SOLICITATION, &ndopts); neigh_release(neigh); + reason = SKB_CONSUMED; } out: - return; + return reason; } static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt) @@ -1844,7 +1846,7 @@ enum skb_drop_reason ndisc_rcv(struct sk_buff *skb) break; case NDISC_ROUTER_SOLICITATION: - ndisc_recv_rs(skb); + reason = ndisc_recv_rs(skb); break; case NDISC_ROUTER_ADVERTISEMENT: |