Mika Penttilä wrote:
Hmm. esp4_err() looks like this :
struct iphdr *iph = (struct iphdr*)skb->data;
struct ip_esp_hdr *esph = (struct
ip_esp_hdr*)(skb->data+(iph->ihl<<2));
struct xfrm_state *x;
if (icmp_hdr(skb)->type != ICMP_DEST_UNREACH ||
icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
return;
x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, esph->spi,
IPPROTO_ESP, AF_INET);
if (!x)
return;
NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n",
ntohl(esph->spi), ntohl(iph->daddr));
xfrm_state_put(x);
where could pmtu discovery be happening?
xfrm_init_pmtu, xfrm_bundle_ok, xfrm_state_mtu, esp4_get_mtu, ...
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