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Hello,
On Tue, 25 Oct 2016, Dwip Banerjee wrote:
> We decrement the IP ttl in all the modes in order to prevent infinite
> route loops. The changes were done based on Julian Anastasov's
> suggestions in a prior thread.
>
> The ttl based check/discard and the actual decrement are done in
> __ip_vs_get_out_rt() and in __ip_vs_get_out_rt_v6(), for the IPv6
> case. decrement_ttl() implements the actual functionality for the
> two cases.
>
>
> Signed-off-by: Dwip Banerjee <dwip@xxxxxxxxxxxxxxxxxx>
Very good, only some coding style problems below.
> ---
> net/netfilter/ipvs/ip_vs_xmit.c | 53
> +++++++++++++++++++++++++++++++++++++++
> 1 files changed, 53 insertions(+), 0 deletions(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
> index 01d3d89..724fd29 100644
> --- a/net/netfilter/ipvs/ip_vs_xmit.c
> +++ b/net/netfilter/ipvs/ip_vs_xmit.c
> @@ -254,6 +254,53 @@ static inline bool ensure_mtu_is_adequate(struct
> netns_ipvs *ipvs, int skb_af,
> return true;
> }
>
> +static inline bool decrement_ttl(struct netns_ipvs *ipvs,
> + int skb_af,
> + struct sk_buff *skb)
> +{
> + struct net *net = ipvs->net;
Add empty line here.
> +#ifdef CONFIG_IP_VS_IPV6
> + if (skb_af == AF_INET6) {
> + struct dst_entry *dst = skb_dst(skb);
> +
> + /* check and decrement ttl */
> + if (ipv6_hdr(skb)->hop_limit <= 1) {
> + /* Force OUTPUT device used as source address */
> + skb->dev = dst->dev;
> + icmpv6_send(skb, ICMPV6_TIME_EXCEED,
> + ICMPV6_EXC_HOPLIMIT, 0);
ICMPV6_EXC_HOPLIMIT should be aligned to 'skb',
it is reported by scripts/checkpatch.pl --strict /tmp/file.patch
Regards
--
Julian Anastasov <ja@xxxxxx>
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