ip_route_me_harder() is called on output codepaths:
1) IPVS: honestly, not sure, looks like it can be called during forwarding
2) IPv4 REJECT: refreshing comment re skb->dst is valid and assigment of
skb->dst right before call :^)
3) NAT: called in LOCAL_OUT hook
4) iptable_mangle: LOCAL_OUT hook
5) nf_ip_reroute(): LOCAL_OUT hook (no clue about queueing packets to luserspace)
ip6_route_me_harder() is also called in output codepaths:
1) ip6table_mangle: LOCAL_OUT hook
2) nf_ip6_reroute: LOCAL_OUT hook (ditto)
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
net/ipv4/netfilter.c | 7 ++++---
net/ipv6/netfilter.c | 2 +-
2 files changed, 5 insertions(+), 4 deletions(-)
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -12,6 +12,7 @@
/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
{
+ struct net *net = dev_net(skb->dst->dev);
const struct iphdr *iph = ip_hdr(skb);
struct rtable *rt;
struct flowi fl = {};
@@ -19,7 +20,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
unsigned int hh_len;
unsigned int type;
- type = inet_addr_type(&init_net, iph->saddr);
+ type = inet_addr_type(net, iph->saddr);
if (addr_type == RTN_UNSPEC)
addr_type = type;
@@ -33,7 +34,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;
fl.mark = skb->mark;
- if (ip_route_output_key(&init_net, &rt, &fl) != 0)
+ if (ip_route_output_key(net, &rt, &fl) != 0)
return -1;
/* Drop old route. */
@@ -43,7 +44,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
/* non-local src, find valid iif to satisfy
* rp-filter when calling ip_route_input. */
fl.nl_u.ip4_u.daddr = iph->saddr;
- if (ip_route_output_key(&init_net, &rt, &fl) != 0)
+ if (ip_route_output_key(net, &rt, &fl) != 0)
return -1;
odst = skb->dst;
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -23,7 +23,7 @@ int ip6_route_me_harder(struct sk_buff *skb)
.saddr = iph->saddr, } },
};
- dst = ip6_route_output(&init_net, skb->sk, &fl);
+ dst = ip6_route_output(dev_net(skb->dst->dev), skb->sk, &fl);
#ifdef CONFIG_XFRM
if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
--
1.5.4.5
--
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