You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
161 lines
4.3 KiB
161 lines
4.3 KiB
From: Pablo Neira Ayuso <pablo@netfilter.org>
|
|
Date: Sat, 9 Dec 2017 15:36:24 +0100
|
|
Subject: [PATCH] netfilter: nf_tables_inet: don't use multihook infrastructure
|
|
anymore
|
|
|
|
Use new native NFPROTO_INET support in netfilter core, this gets rid of
|
|
ad-hoc code in the nf_tables API codebase.
|
|
|
|
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
|
---
|
|
|
|
--- a/include/net/netfilter/nf_tables_ipv4.h
|
|
+++ b/include/net/netfilter/nf_tables_ipv4.h
|
|
@@ -53,6 +53,4 @@ static inline void nft_set_pktinfo_ipv4_
|
|
nft_set_pktinfo_unspec(pkt, skb);
|
|
}
|
|
|
|
-extern struct nft_af_info nft_af_ipv4;
|
|
-
|
|
#endif
|
|
--- a/include/net/netfilter/nf_tables_ipv6.h
|
|
+++ b/include/net/netfilter/nf_tables_ipv6.h
|
|
@@ -69,6 +69,4 @@ static inline void nft_set_pktinfo_ipv6_
|
|
nft_set_pktinfo_unspec(pkt, skb);
|
|
}
|
|
|
|
-extern struct nft_af_info nft_af_ipv6;
|
|
-
|
|
#endif
|
|
--- a/net/ipv4/netfilter/nf_tables_ipv4.c
|
|
+++ b/net/ipv4/netfilter/nf_tables_ipv4.c
|
|
@@ -45,7 +45,7 @@ static unsigned int nft_ipv4_output(void
|
|
return nft_do_chain_ipv4(priv, skb, state);
|
|
}
|
|
|
|
-struct nft_af_info nft_af_ipv4 __read_mostly = {
|
|
+static struct nft_af_info nft_af_ipv4 __read_mostly = {
|
|
.family = NFPROTO_IPV4,
|
|
.nhooks = NF_INET_NUMHOOKS,
|
|
.owner = THIS_MODULE,
|
|
@@ -58,7 +58,6 @@ struct nft_af_info nft_af_ipv4 __read_mo
|
|
[NF_INET_POST_ROUTING] = nft_do_chain_ipv4,
|
|
},
|
|
};
|
|
-EXPORT_SYMBOL_GPL(nft_af_ipv4);
|
|
|
|
static int nf_tables_ipv4_init_net(struct net *net)
|
|
{
|
|
--- a/net/ipv6/netfilter/nf_tables_ipv6.c
|
|
+++ b/net/ipv6/netfilter/nf_tables_ipv6.c
|
|
@@ -42,7 +42,7 @@ static unsigned int nft_ipv6_output(void
|
|
return nft_do_chain_ipv6(priv, skb, state);
|
|
}
|
|
|
|
-struct nft_af_info nft_af_ipv6 __read_mostly = {
|
|
+static struct nft_af_info nft_af_ipv6 __read_mostly = {
|
|
.family = NFPROTO_IPV6,
|
|
.nhooks = NF_INET_NUMHOOKS,
|
|
.owner = THIS_MODULE,
|
|
@@ -55,7 +55,6 @@ struct nft_af_info nft_af_ipv6 __read_mo
|
|
[NF_INET_POST_ROUTING] = nft_do_chain_ipv6,
|
|
},
|
|
};
|
|
-EXPORT_SYMBOL_GPL(nft_af_ipv6);
|
|
|
|
static int nf_tables_ipv6_init_net(struct net *net)
|
|
{
|
|
--- a/net/netfilter/nf_tables_inet.c
|
|
+++ b/net/netfilter/nf_tables_inet.c
|
|
@@ -9,6 +9,7 @@
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ip.h>
|
|
+#include <linux/ipv6.h>
|
|
#include <linux/netfilter_ipv4.h>
|
|
#include <linux/netfilter_ipv6.h>
|
|
#include <net/netfilter/nf_tables.h>
|
|
@@ -16,26 +17,71 @@
|
|
#include <net/netfilter/nf_tables_ipv6.h>
|
|
#include <net/ip.h>
|
|
|
|
-static void nft_inet_hook_ops_init(struct nf_hook_ops *ops, unsigned int n)
|
|
+static unsigned int nft_do_chain_inet(void *priv, struct sk_buff *skb,
|
|
+ const struct nf_hook_state *state)
|
|
{
|
|
- struct nft_af_info *afi;
|
|
+ struct nft_pktinfo pkt;
|
|
|
|
- if (n == 1)
|
|
- afi = &nft_af_ipv4;
|
|
- else
|
|
- afi = &nft_af_ipv6;
|
|
-
|
|
- ops->pf = afi->family;
|
|
- if (afi->hooks[ops->hooknum])
|
|
- ops->hook = afi->hooks[ops->hooknum];
|
|
+ nft_set_pktinfo(&pkt, skb, state);
|
|
+
|
|
+ switch (state->pf) {
|
|
+ case NFPROTO_IPV4:
|
|
+ nft_set_pktinfo_ipv4(&pkt, skb);
|
|
+ break;
|
|
+ case NFPROTO_IPV6:
|
|
+ nft_set_pktinfo_ipv6(&pkt, skb);
|
|
+ break;
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ return nft_do_chain(&pkt, priv);
|
|
+}
|
|
+
|
|
+static unsigned int nft_inet_output(void *priv, struct sk_buff *skb,
|
|
+ const struct nf_hook_state *state)
|
|
+{
|
|
+ struct nft_pktinfo pkt;
|
|
+
|
|
+ nft_set_pktinfo(&pkt, skb, state);
|
|
+
|
|
+ switch (state->pf) {
|
|
+ case NFPROTO_IPV4:
|
|
+ if (unlikely(skb->len < sizeof(struct iphdr) ||
|
|
+ ip_hdr(skb)->ihl < sizeof(struct iphdr) / 4)) {
|
|
+ if (net_ratelimit())
|
|
+ pr_info("ignoring short SOCK_RAW packet\n");
|
|
+ return NF_ACCEPT;
|
|
+ }
|
|
+ nft_set_pktinfo_ipv4(&pkt, skb);
|
|
+ break;
|
|
+ case NFPROTO_IPV6:
|
|
+ if (unlikely(skb->len < sizeof(struct ipv6hdr))) {
|
|
+ if (net_ratelimit())
|
|
+ pr_info("ignoring short SOCK_RAW packet\n");
|
|
+ return NF_ACCEPT;
|
|
+ }
|
|
+ nft_set_pktinfo_ipv6(&pkt, skb);
|
|
+ break;
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ return nft_do_chain(&pkt, priv);
|
|
}
|
|
|
|
static struct nft_af_info nft_af_inet __read_mostly = {
|
|
.family = NFPROTO_INET,
|
|
.nhooks = NF_INET_NUMHOOKS,
|
|
.owner = THIS_MODULE,
|
|
- .nops = 2,
|
|
- .hook_ops_init = nft_inet_hook_ops_init,
|
|
+ .nops = 1,
|
|
+ .hooks = {
|
|
+ [NF_INET_LOCAL_IN] = nft_do_chain_inet,
|
|
+ [NF_INET_LOCAL_OUT] = nft_inet_output,
|
|
+ [NF_INET_FORWARD] = nft_do_chain_inet,
|
|
+ [NF_INET_PRE_ROUTING] = nft_do_chain_inet,
|
|
+ [NF_INET_POST_ROUTING] = nft_do_chain_inet,
|
|
+ },
|
|
};
|
|
|
|
static int __net_init nf_tables_inet_init_net(struct net *net)
|
|
|