diff options
Diffstat (limited to 'include/net/ipip.h')
| -rw-r--r-- | include/net/ipip.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/ipip.h b/include/net/ipip.h index 21947cf4fa46..fd19625ff99d 100644 --- a/include/net/ipip.h +++ b/include/net/ipip.h @@ -71,4 +71,21 @@ static inline void iptunnel_xmit(struct sk_buff *skb, struct net_device *dev) } } +static inline void tunnel_ip_select_ident(struct sk_buff *skb, + const struct iphdr *old_iph, + struct dst_entry *dst) +{ + struct iphdr *iph = ip_hdr(skb); + + if (iph->frag_off & htons(IP_DF)) + iph->id = 0; + else { + /* Use inner packet iph-id if possible. */ + if (skb->protocol == htons(ETH_P_IP) && old_iph->id) + iph->id = old_iph->id; + else + __ip_select_ident(iph, dst, + (skb_shinfo(skb)->gso_segs ?: 1) - 1); + } +} #endif |