+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);
+}
+