For IPv6 Jumbo packets, the ipv6_hdr(skb)->payload_len is always 0,
and its real payload_len ( > 65535) is saved in hbh exthdr. With 0
length for the jumbo packets, all data and exthdr will be trimmed
in nf_ct_skb_network_trim().
This patch is to call nf_ip6_check_hbh_len() to get real pkt_len
of the IPv6 packet, similar to br_validate_ipv6().
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
#include <net/ipv6_frag.h>
#include <net/ip.h>
+#include <linux/netfilter_ipv6.h>
/* 'skb' should already be pulled to nh_ofs. */
int nf_ct_helper(struct sk_buff *skb, struct nf_conn *ct,
len = skb_ip_totlen(skb);
break;
case NFPROTO_IPV6:
- len = sizeof(struct ipv6hdr)
- + ntohs(ipv6_hdr(skb)->payload_len);
+ len = ntohs(ipv6_hdr(skb)->payload_len);
+ if (ipv6_hdr(skb)->nexthdr == NEXTHDR_HOP) {
+ int err = nf_ip6_check_hbh_len(skb, &len);
+
+ if (err)
+ return err;
+ }
+ len += sizeof(struct ipv6hdr);
break;
default:
len = skb->len;