summaryrefslogtreecommitdiff
path: root/target/linux/generic/patches-2.6.32/280-sched_act_connmark.patch
blob: 734fd1cd14097b911ad3db4f06803005bd72854f (plain)
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
--- /dev/null
+++ b/net/sched/act_connmark.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2011 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/pkt_cls.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <net/act_api.h>
+
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_core.h>
+
+#define TCA_ACT_CONNMARK	20
+
+#define CONNMARK_TAB_MASK     3
+static struct tcf_common *tcf_connmark_ht[CONNMARK_TAB_MASK + 1];
+static u32 connmark_idx_gen;
+static DEFINE_RWLOCK(connmark_lock);
+
+static struct tcf_hashinfo connmark_hash_info = {
+	.htab	=	tcf_connmark_ht,
+	.hmask	=	CONNMARK_TAB_MASK,
+	.lock	=	&connmark_lock,
+};
+
+static int tcf_connmark(struct sk_buff *skb, struct tc_action *a,
+		       struct tcf_result *res)
+{
+	struct nf_conn *c;
+	enum ip_conntrack_info ctinfo;
+	int proto;
+	int r;
+
+	if (skb->protocol == htons(ETH_P_IP)) {
+		if (skb->len < sizeof(struct iphdr))
+			goto out;
+		proto = PF_INET;
+	} else if (skb->protocol == htons(ETH_P_IPV6)) {
+		if (skb->len < sizeof(struct ipv6hdr))
+			goto out;
+		proto = PF_INET6;
+	} else
+		goto out;
+
+	r = nf_conntrack_in(dev_net(skb->dev), proto, NF_INET_PRE_ROUTING, skb);
+	if (r != NF_ACCEPT)
+		goto out;
+
+	c = nf_ct_get(skb, &ctinfo);
+	if (!c)
+		goto out;
+
+	skb->mark = c->mark;
+	nf_conntrack_put(skb->nfct);
+	skb->nfct = NULL;
+
+out:
+	return TC_ACT_PIPE;
+}
+
+static int tcf_connmark_init(struct nlattr *nla, struct nlattr *est,
+			 struct tc_action *a, int ovr, int bind)
+{
+	struct tcf_common *pc;
+
+	pc = tcf_hash_create(0, est, a, sizeof(*pc), bind,
+			     &connmark_idx_gen, &connmark_hash_info);
+	if (IS_ERR(pc))
+	    return PTR_ERR(pc);
+
+	tcf_hash_insert(pc, &connmark_hash_info);
+
+	return ACT_P_CREATED;
+}
+
+static inline int tcf_connmark_cleanup(struct tc_action *a, int bind)
+{
+	if (a->priv)
+		return tcf_hash_release(a->priv, bind, &connmark_hash_info);
+	return 0;
+}
+
+static inline int tcf_connmark_dump(struct sk_buff *skb, struct tc_action *a,
+				int bind, int ref)
+{
+	return skb->len;
+}
+
+static struct tc_action_ops act_connmark_ops = {
+	.kind		=	"connmark",
+	.hinfo		=	&connmark_hash_info,
+	.type		=	TCA_ACT_CONNMARK,
+	.capab		=	TCA_CAP_NONE,
+	.owner		=	THIS_MODULE,
+	.act		=	tcf_connmark,
+	.dump		=	tcf_connmark_dump,
+	.cleanup	=	tcf_connmark_cleanup,
+	.init		=	tcf_connmark_init,
+	.walk		=	tcf_generic_walker,
+};
+
+MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
+MODULE_DESCRIPTION("Connection tracking mark restoring");
+MODULE_LICENSE("GPL");
+
+static int __init connmark_init_module(void)
+{
+	return tcf_register_action(&act_connmark_ops);
+}
+
+static void __exit connmark_cleanup_module(void)
+{
+	tcf_unregister_action(&act_connmark_ops);
+}
+
+module_init(connmark_init_module);
+module_exit(connmark_cleanup_module);
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -546,6 +546,18 @@ config NET_ACT_SKBEDIT
 	  To compile this code as a module, choose M here: the
 	  module will be called skbedit.
 
+config NET_ACT_CONNMARK
+        tristate "Connection Tracking Marking"
+        depends on NET_CLS_ACT
+        depends on NF_CONNTRACK
+        ---help---
+	  Say Y here to restore the connmark from a scheduler action
+
+	  If unsure, say N.
+
+	  To compile this code as a module, choose M here: the
+	  module will be called act_connmark.
+
 config NET_CLS_IND
 	bool "Incoming device classification"
 	depends on NET_CLS_U32 || NET_CLS_FW
--- a/net/sched/Makefile
+++ b/net/sched/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_NET_ACT_NAT)	+= act_nat.o
 obj-$(CONFIG_NET_ACT_PEDIT)	+= act_pedit.o
 obj-$(CONFIG_NET_ACT_SIMP)	+= act_simple.o
 obj-$(CONFIG_NET_ACT_SKBEDIT)	+= act_skbedit.o
+obj-$(CONFIG_NET_ACT_CONNMARK)	+= act_connmark.o
 obj-$(CONFIG_NET_SCH_FIFO)	+= sch_fifo.o
 obj-$(CONFIG_NET_SCH_CBQ)	+= sch_cbq.o
 obj-$(CONFIG_NET_SCH_HTB)	+= sch_htb.o