sizeof(fl4->saddr) + sizeof(fl4->daddr));
}
-int ip_queue_xmit(struct sk_buff *skb, struct flowi *fl)
+/* Note: skb->sk can be different from sk, in case of tunnels */
+int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
{
- struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct ip_options_rcu *inet_opt;
struct flowi4 *fl4;
ip_select_ident_more(skb, &rt->dst, sk,
(skb_shinfo(skb)->gso_segs ?: 1) - 1);
+ /* TODO : should we use skb->sk here instead of sk ? */
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
__be16 not_last_frag;
struct rtable *rt = skb_rtable(skb);
int err = 0;
- bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED;
dev = rt->dst.dev;
iph = ip_hdr(skb);
- mtu = ip_dst_mtu_maybe_forward(&rt->dst, forwarding);
+ mtu = ip_skb_dst_mtu(skb);
if (unlikely(((iph->frag_off & htons(IP_DF)) && !skb->local_df) ||
(IPCB(skb)->frag_max_size &&
IPCB(skb)->frag_max_size > mtu))) {
fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
- maxnonfragsize = (inet->pmtudisc >= IP_PMTUDISC_DO) ?
- mtu : 0xFFFF;
+ maxnonfragsize = ip_sk_local_df(sk) ? 0xFFFF : mtu;
if (cork->length + length > maxnonfragsize - fragheaderlen) {
ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
- maxnonfragsize = (inet->pmtudisc >= IP_PMTUDISC_DO) ?
- mtu : 0xFFFF;
+ maxnonfragsize = ip_sk_local_df(sk) ? 0xFFFF : mtu;
if (cork->length + size > maxnonfragsize - fragheaderlen) {
ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
* to fragment the frame generated here. No matter, what transforms
* how transforms change size of the packet, it will come out.
*/
- if (inet->pmtudisc < IP_PMTUDISC_DO)
- skb->local_df = 1;
+ skb->local_df = ip_sk_local_df(sk);
/* DF bit is set when we want to see DF on outgoing frames.
* If local_df is set too, we still allow to fragment this frame