Re: [PATCH net-next v2 2/2] mpls: allow TTL propagation from IP packets to be configured
From: David Ahern <hidden>
Date: 2017-03-10 02:54:27
On 3/7/17 5:46 PM, Robert Shearman wrote:
quoted hunk ↗ jump to hunk
@@ -78,6 +70,29 @@ static int mpls_xmit(struct sk_buff *skb) tun_encap_info = mpls_lwtunnel_encap(dst->lwtstate); + /* Obtain the ttl */ + if (dst->ops->family == AF_INET) { + if (tun_encap_info->ttl_propagate == MPLS_TTL_PROP_DISABLED) + ttl = tun_encap_info->default_ttl; + else if (tun_encap_info->ttl_propagate == MPLS_TTL_PROP_DEFAULT && + !net->mpls.ip_ttl_propagate) + ttl = net->mpls.default_ttl; + else + ttl = ip_hdr(skb)->ttl;
After staring at that for a while, an explanation above this if {} else
{} section on the ttl selection will be very helpful.