1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Wed, 20 Dec 2017 16:12:55 +0100
Subject: [PATCH] netfilter: remove saveroute indirection in struct nf_afinfo
This is only used by nf_queue.c and this function comes with no symbol
dependencies with IPv6, it just refers to structure layouts. Therefore,
we can replace it by a direct function call from where it belongs.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -313,8 +313,6 @@ struct nf_afinfo {
unsigned short family;
int (*route)(struct net *net, struct dst_entry **dst,
struct flowi *fl, bool strict);
- void (*saveroute)(const struct sk_buff *skb,
- struct nf_queue_entry *entry);
int (*reroute)(struct net *net, struct sk_buff *skb,
const struct nf_queue_entry *entry);
int route_key_size;
--- a/include/linux/netfilter_ipv4.h
+++ b/include/linux/netfilter_ipv4.h
@@ -6,6 +6,16 @@
#include <uapi/linux/netfilter_ipv4.h>
+/* Extra routing may needed on local out, as the QUEUE target never returns
+ * control to the table.
+ */
+struct ip_rt_info {
+ __be32 daddr;
+ __be32 saddr;
+ u_int8_t tos;
+ u_int32_t mark;
+};
+
int ip_route_me_harder(struct net *net, struct sk_buff *skb, unsigned addr_type);
#ifdef CONFIG_INET
--- a/include/linux/netfilter_ipv6.h
+++ b/include/linux/netfilter_ipv6.h
@@ -9,6 +9,15 @@
#include <uapi/linux/netfilter_ipv6.h>
+/* Extra routing may needed on local out, as the QUEUE target never returns
+ * control to the table.
+ */
+struct ip6_rt_info {
+ struct in6_addr daddr;
+ struct in6_addr saddr;
+ u_int32_t mark;
+};
+
/*
* Hook functions for ipv6 to allow xt_* modules to be built-in even
* if IPv6 is a module.
--- a/net/bridge/netfilter/nf_tables_bridge.c
+++ b/net/bridge/netfilter/nf_tables_bridge.c
@@ -95,11 +95,6 @@ static const struct nf_chain_type filter
(1 << NF_BR_POST_ROUTING),
};
-static void nf_br_saveroute(const struct sk_buff *skb,
- struct nf_queue_entry *entry)
-{
-}
-
static int nf_br_reroute(struct net *net, struct sk_buff *skb,
const struct nf_queue_entry *entry)
{
@@ -115,7 +110,6 @@ static int nf_br_route(struct net *net,
static const struct nf_afinfo nf_br_afinfo = {
.family = AF_BRIDGE,
.route = nf_br_route,
- .saveroute = nf_br_saveroute,
.reroute = nf_br_reroute,
.route_key_size = 0,
};
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -80,33 +80,6 @@ int ip_route_me_harder(struct net *net,
}
EXPORT_SYMBOL(ip_route_me_harder);
-/*
- * Extra routing may needed on local out, as the QUEUE target never
- * returns control to the table.
- */
-
-struct ip_rt_info {
- __be32 daddr;
- __be32 saddr;
- u_int8_t tos;
- u_int32_t mark;
-};
-
-static void nf_ip_saveroute(const struct sk_buff *skb,
- struct nf_queue_entry *entry)
-{
- struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry);
-
- if (entry->state.hook == NF_INET_LOCAL_OUT) {
- const struct iphdr *iph = ip_hdr(skb);
-
- rt_info->tos = iph->tos;
- rt_info->daddr = iph->daddr;
- rt_info->saddr = iph->saddr;
- rt_info->mark = skb->mark;
- }
-}
-
static int nf_ip_reroute(struct net *net, struct sk_buff *skb,
const struct nf_queue_entry *entry)
{
@@ -190,7 +163,6 @@ static int nf_ip_route(struct net *net,
static const struct nf_afinfo nf_ip_afinfo = {
.family = AF_INET,
.route = nf_ip_route,
- .saveroute = nf_ip_saveroute,
.reroute = nf_ip_reroute,
.route_key_size = sizeof(struct ip_rt_info),
};
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -72,31 +72,6 @@ int ip6_route_me_harder(struct net *net,
}
EXPORT_SYMBOL(ip6_route_me_harder);
-/*
- * Extra routing may needed on local out, as the QUEUE target never
- * returns control to the table.
- */
-
-struct ip6_rt_info {
- struct in6_addr daddr;
- struct in6_addr saddr;
- u_int32_t mark;
-};
-
-static void nf_ip6_saveroute(const struct sk_buff *skb,
- struct nf_queue_entry *entry)
-{
- struct ip6_rt_info *rt_info = nf_queue_entry_reroute(entry);
-
- if (entry->state.hook == NF_INET_LOCAL_OUT) {
- const struct ipv6hdr *iph = ipv6_hdr(skb);
-
- rt_info->daddr = iph->daddr;
- rt_info->saddr = iph->saddr;
- rt_info->mark = skb->mark;
- }
-}
-
static int nf_ip6_reroute(struct net *net, struct sk_buff *skb,
const struct nf_queue_entry *entry)
{
@@ -204,7 +179,6 @@ static const struct nf_ipv6_ops ipv6ops
static const struct nf_afinfo nf_ip6_afinfo = {
.family = AF_INET6,
.route = nf_ip6_route,
- .saveroute = nf_ip6_saveroute,
.reroute = nf_ip6_reroute,
.route_key_size = sizeof(struct ip6_rt_info),
};
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -10,6 +10,8 @@
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
#include <linux/netfilter_bridge.h>
#include <linux/seq_file.h>
#include <linux/rcupdate.h>
@@ -121,6 +123,35 @@ void nf_queue_nf_hook_drop(struct net *n
}
EXPORT_SYMBOL_GPL(nf_queue_nf_hook_drop);
+static void nf_ip_saveroute(const struct sk_buff *skb,
+ struct nf_queue_entry *entry)
+{
+ struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry);
+
+ if (entry->state.hook == NF_INET_LOCAL_OUT) {
+ const struct iphdr *iph = ip_hdr(skb);
+
+ rt_info->tos = iph->tos;
+ rt_info->daddr = iph->daddr;
+ rt_info->saddr = iph->saddr;
+ rt_info->mark = skb->mark;
+ }
+}
+
+static void nf_ip6_saveroute(const struct sk_buff *skb,
+ struct nf_queue_entry *entry)
+{
+ struct ip6_rt_info *rt_info = nf_queue_entry_reroute(entry);
+
+ if (entry->state.hook == NF_INET_LOCAL_OUT) {
+ const struct ipv6hdr *iph = ipv6_hdr(skb);
+
+ rt_info->daddr = iph->daddr;
+ rt_info->saddr = iph->saddr;
+ rt_info->mark = skb->mark;
+ }
+}
+
static int __nf_queue(struct sk_buff *skb, const struct nf_hook_state *state,
const struct nf_hook_entries *entries,
unsigned int index, unsigned int queuenum)
@@ -165,7 +196,15 @@ static int __nf_queue(struct sk_buff *sk
return -ENOTCONN;
}
- afinfo->saveroute(skb, entry);
+ switch (entry->state.pf) {
+ case AF_INET:
+ nf_ip_saveroute(skb, entry);
+ break;
+ case AF_INET6:
+ nf_ip6_saveroute(skb, entry);
+ break;
+ }
+
status = qh->outfn(entry, queuenum);
if (status < 0) {
|
