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ipv4: Pass struct net into ip_route_me_harder

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Don't make ip_route_me_harder guess which network namespace
it is routing in, pass the network namespace in.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Eric W. Biederman 2015-09-25 15:07:30 -05:00 committed by Pablo Neira Ayuso
parent 6a1d689d9f
commit e45f50660e
8 changed files with 11 additions and 10 deletions
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2
include/linux/netfilter_ipv4.h
View file

@ -6,7 +6,7 @@
#include <uapi/linux/netfilter_ipv4.h>
int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type);
int ip_route_me_harder(struct net *net, struct sk_buff *skb, unsigned addr_type);
__sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol);
#endif /*__LINUX_IP_NETFILTER_H*/

5
net/ipv4/netfilter.c
View file

@ -17,9 +17,8 @@
#include <net/netfilter/nf_queue.h>
/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
int ip_route_me_harder(struct sk_buff *skb, unsigned int addr_type)
int ip_route_me_harder(struct net *net, struct sk_buff *skb, unsigned int addr_type)
{
struct net *net = dev_net(skb_dst(skb)->dev);
const struct iphdr *iph = ip_hdr(skb);
struct rtable *rt;
struct flowi4 fl4 = {};
@ -116,7 +115,7 @@ static int nf_ip_reroute(struct net *net, struct sk_buff *skb,
skb->mark == rt_info->mark &&
iph->daddr == rt_info->daddr &&
iph->saddr == rt_info->saddr))
return ip_route_me_harder(skb, RTN_UNSPEC);
return ip_route_me_harder(net, skb, RTN_UNSPEC);
}
return 0;
}

4
net/ipv4/netfilter/ipt_SYNPROXY.c
View file

@ -45,6 +45,8 @@ synproxy_send_tcp(const struct synproxy_net *snet,
struct iphdr *niph, struct tcphdr *nth,
unsigned int tcp_hdr_size)
{
struct net *net = nf_ct_net(snet->tmpl);
nth->check = ~tcp_v4_check(tcp_hdr_size, niph->saddr, niph->daddr, 0);
nskb->ip_summed = CHECKSUM_PARTIAL;
nskb->csum_start = (unsigned char *)nth - nskb->head;
@ -52,7 +54,7 @@ synproxy_send_tcp(const struct synproxy_net *snet,
skb_dst_set_noref(nskb, skb_dst(skb));
nskb->protocol = htons(ETH_P_IP);
if (ip_route_me_harder(nskb, RTN_UNSPEC))
if (ip_route_me_harder(net, nskb, RTN_UNSPEC))
goto free_nskb;
if (nfct) {

2
net/ipv4/netfilter/iptable_mangle.c
View file

@ -67,7 +67,7 @@ ipt_mangle_out(struct sk_buff *skb, const struct nf_hook_state *state)
iph->daddr != daddr ||
skb->mark != mark ||
iph->tos != tos) {
err = ip_route_me_harder(skb, RTN_UNSPEC);
err = ip_route_me_harder(state->net, skb, RTN_UNSPEC);
if (err < 0)
ret = NF_DROP_ERR(err);
}

2
net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
View file

@ -431,7 +431,7 @@ nf_nat_ipv4_local_fn(void *priv, struct sk_buff *skb,
if (ct->tuplehash[dir].tuple.dst.u3.ip !=
ct->tuplehash[!dir].tuple.src.u3.ip) {
err = ip_route_me_harder(skb, RTN_UNSPEC);
err = ip_route_me_harder(state->net, skb, RTN_UNSPEC);
if (err < 0)
ret = NF_DROP_ERR(err);
}

2
net/ipv4/netfilter/nf_reject_ipv4.c
View file

@ -129,7 +129,7 @@ void nf_send_reset(struct net *net, struct sk_buff *oldskb, int hook)
ip4_dst_hoplimit(skb_dst(nskb)));
nf_reject_ip_tcphdr_put(nskb, oldskb, oth);
if (ip_route_me_harder(nskb, RTN_UNSPEC))
if (ip_route_me_harder(net, nskb, RTN_UNSPEC))
goto free_nskb;
/* "Never happens" */

2
net/ipv4/netfilter/nft_chain_route_ipv4.c
View file

@ -53,7 +53,7 @@ static unsigned int nf_route_table_hook(void *priv,
iph->daddr != daddr ||
skb->mark != mark ||
iph->tos != tos)
if (ip_route_me_harder(skb, RTN_UNSPEC))
if (ip_route_me_harder(state->net, skb, RTN_UNSPEC))
ret = NF_DROP;
}
return ret;

2
net/netfilter/ipvs/ip_vs_core.c
View file

@ -720,7 +720,7 @@ static int ip_vs_route_me_harder(struct netns_ipvs *ipvs, int af,
} else
#endif
if (!(skb_rtable(skb)->rt_flags & RTCF_LOCAL) &&
ip_route_me_harder(skb, RTN_LOCAL) != 0)
ip_route_me_harder(ipvs->net, skb, RTN_LOCAL) != 0)
return 1;
return 0;