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-rw-r--r--net/ipv4/icmp.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 17ff9fd7cdda..3ac5dff79627 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -934,6 +934,29 @@ error:
goto drop;
}
+void icmp_err(struct sk_buff *skb, u32 info)
+{
+ struct iphdr *iph = (struct iphdr *)skb->data;
+ struct icmphdr *icmph = (struct icmphdr *)(skb->data+(iph->ihl<<2));
+ int type = icmp_hdr(skb)->type;
+ int code = icmp_hdr(skb)->code;
+ struct net *net = dev_net(skb->dev);
+
+ /*
+ * Use ping_err to handle all icmp errors except those
+ * triggered by ICMP_ECHOREPLY which sent from kernel.
+ */
+ if (icmph->type != ICMP_ECHOREPLY) {
+ ping_err(skb, info);
+ return;
+ }
+
+ if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
+ ipv4_update_pmtu(skb, net, info, 0, 0, IPPROTO_ICMP, 0);
+ else if (type == ICMP_REDIRECT)
+ ipv4_redirect(skb, net, 0, 0, IPPROTO_ICMP, 0);
+}
+
/*
* This table is the definition of how we handle ICMP.
*/