diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 19 | ||||
| -rw-r--r-- | include/net/dropreason.h | 12 | ||||
| -rw-r--r-- | include/net/ipv6.h | 3 | ||||
| -rw-r--r-- | include/net/ndisc.h | 2 |
4 files changed, 30 insertions, 6 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 47ab28a37f2f..d5602b15c714 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2631,13 +2631,24 @@ void *skb_pull_data(struct sk_buff *skb, size_t len); void *__pskb_pull_tail(struct sk_buff *skb, int delta); -static inline bool pskb_may_pull(struct sk_buff *skb, unsigned int len) +static inline enum skb_drop_reason +pskb_may_pull_reason(struct sk_buff *skb, unsigned int len) { if (likely(len <= skb_headlen(skb))) - return true; + return SKB_NOT_DROPPED_YET; + if (unlikely(len > skb->len)) - return false; - return __pskb_pull_tail(skb, len - skb_headlen(skb)) != NULL; + return SKB_DROP_REASON_PKT_TOO_SMALL; + + if (unlikely(!__pskb_pull_tail(skb, len - skb_headlen(skb)))) + return SKB_DROP_REASON_NOMEM; + + return SKB_NOT_DROPPED_YET; +} + +static inline bool pskb_may_pull(struct sk_buff *skb, unsigned int len) +{ + return pskb_may_pull_reason(skb, len) == SKB_NOT_DROPPED_YET; } static inline void *pskb_pull(struct sk_buff *skb, unsigned int len) diff --git a/include/net/dropreason.h b/include/net/dropreason.h index 94bc3d5d8803..ef3f65d135d3 100644 --- a/include/net/dropreason.h +++ b/include/net/dropreason.h @@ -72,6 +72,10 @@ FN(FRAG_REASM_TIMEOUT) \ FN(FRAG_TOO_FAR) \ FN(TCP_MINTTL) \ + FN(IPV6_BAD_EXTHDR) \ + FN(IPV6_NDISC_FRAG) \ + FN(IPV6_NDISC_HOP_LIMIT) \ + FN(IPV6_NDISC_BAD_CODE) \ FNe(MAX) /** @@ -318,6 +322,14 @@ enum skb_drop_reason { * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). */ SKB_DROP_REASON_TCP_MINTTL, + /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ + SKB_DROP_REASON_IPV6_BAD_EXTHDR, + /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ + SKB_DROP_REASON_IPV6_NDISC_FRAG, + /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ + SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, + /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ + SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, /** * @SKB_DROP_REASON_MAX: the maximum of drop reason, which shouldn't be * used as a real 'reason' diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 03f3af02a9a6..7332296eca44 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -436,7 +436,8 @@ static inline void fl6_sock_release(struct ip6_flowlabel *fl) atomic_dec(&fl->users); } -void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info); +enum skb_drop_reason icmpv6_notify(struct sk_buff *skb, u8 type, + u8 code, __be32 info); void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, struct icmp6hdr *thdr, int len); diff --git a/include/net/ndisc.h b/include/net/ndisc.h index da7eec8669ec..07e5168cdaf9 100644 --- a/include/net/ndisc.h +++ b/include/net/ndisc.h @@ -445,7 +445,7 @@ int ndisc_late_init(void); void ndisc_late_cleanup(void); void ndisc_cleanup(void); -int ndisc_rcv(struct sk_buff *skb); +enum skb_drop_reason ndisc_rcv(struct sk_buff *skb); struct sk_buff *ndisc_ns_create(struct net_device *dev, const struct in6_addr *solicit, const struct in6_addr *saddr, u64 nonce); |