ipv4: introduce new IP_MTU_DISCOVER mode IP_PMTUDISC_INTERFACE

[cascardo/linux.git] / net / ipv4 / ip_sockglue.c

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 56e3445..3f85826 100644 (file)
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -627,7 +627,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
                inet->nodefrag = val ? 1 : 0;
                break;
        case IP_MTU_DISCOVER:
-               if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
+               if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_INTERFACE)
                        goto e_inval;
                inet->pmtudisc = val;
                break;
@@ -1052,11 +1052,12 @@ e_inval:
  * destination in skb->cb[] before dst drop.
  * This way, receiver doesnt make cache line misses to read rtable.
  */
-void ipv4_pktinfo_prepare(struct sk_buff *skb)
+void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb)
 {
        struct in_pktinfo *pktinfo = PKTINFO_SKB_CB(skb);
 
-       if (skb_rtable(skb)) {
+       if ((inet_sk(sk)->cmsg_flags & IP_CMSG_PKTINFO) &&
+           skb_rtable(skb)) {
                pktinfo->ipi_ifindex = inet_iif(skb);
                pktinfo->ipi_spec_dst.s_addr = fib_compute_spec_dst(skb);
        } else {