184 lines
4.9 KiB
Diff
184 lines
4.9 KiB
Diff
--- /dev/null
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+++ b/net/sched/act_connmark.c
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@@ -0,0 +1,148 @@
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+/*
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+ * Copyright (c) 2011 Felix Fietkau <nbd@openwrt.org>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms and conditions of the GNU General Public License,
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+ * version 2, as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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+ *
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+ * You should have received a copy of the GNU General Public License along with
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+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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+ * Place - Suite 330, Boston, MA 02111-1307 USA.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/skbuff.h>
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+#include <linux/rtnetlink.h>
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+#include <linux/pkt_cls.h>
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+#include <linux/ip.h>
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+#include <linux/ipv6.h>
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+#include <net/netlink.h>
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+#include <net/pkt_sched.h>
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+#include <net/act_api.h>
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+
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+#include <net/netfilter/nf_conntrack.h>
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+#include <net/netfilter/nf_conntrack_core.h>
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+
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+#define TCA_ACT_CONNMARK 20
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+
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+#define CONNMARK_TAB_MASK 3
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+static struct tcf_common *tcf_connmark_ht[CONNMARK_TAB_MASK + 1];
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+static u32 connmark_idx_gen;
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+static DEFINE_RWLOCK(connmark_lock);
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+
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+static struct tcf_hashinfo connmark_hash_info = {
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+ .htab = tcf_connmark_ht,
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+ .hmask = CONNMARK_TAB_MASK,
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+ .lock = &connmark_lock,
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+};
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+
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+static int tcf_connmark(struct sk_buff *skb, const struct tc_action *a,
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+ struct tcf_result *res)
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+{
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+ struct nf_conn *c;
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+ enum ip_conntrack_info ctinfo;
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+ int proto;
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+ int r;
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+
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+ if (skb->protocol == htons(ETH_P_IP)) {
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+ if (skb->len < sizeof(struct iphdr))
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+ goto out;
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+ proto = PF_INET;
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+ } else if (skb->protocol == htons(ETH_P_IPV6)) {
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+ if (skb->len < sizeof(struct ipv6hdr))
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+ goto out;
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+ proto = PF_INET6;
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+ } else
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+ goto out;
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+
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+ r = nf_conntrack_in(dev_net(skb->dev), proto, NF_INET_PRE_ROUTING, skb);
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+ if (r != NF_ACCEPT)
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+ goto out;
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+
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+ c = nf_ct_get(skb, &ctinfo);
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+ if (!c)
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+ goto out;
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+
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+ skb->mark = c->mark;
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+ nf_conntrack_put(skb->nfct);
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+ skb->nfct = NULL;
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+
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+out:
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+ return TC_ACT_PIPE;
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+}
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+
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+static int tcf_connmark_init(struct net *net, struct nlattr *nla,
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+ struct nlattr *est, struct tc_action *a,
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+ int ovr, int bind)
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+{
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+ struct tcf_common *pc;
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+ int ret = 0;
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+
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+ pc = tcf_hash_check(0, a, bind, &connmark_hash_info);
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+ if (!pc) {
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+ pc = tcf_hash_create(0, est, a, sizeof(*pc), bind,
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+ &connmark_idx_gen, &connmark_hash_info);
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+ if (IS_ERR(pc))
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+ return PTR_ERR(pc);
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+
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+ tcf_hash_insert(pc, &connmark_hash_info);
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+ ret = ACT_P_CREATED;
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+ } else {
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+ if (!ovr) {
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+ tcf_hash_release(pc, bind, &connmark_hash_info);
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+ return -EEXIST;
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+ }
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+ }
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+
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+ return ret;
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+}
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+
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+static inline int tcf_connmark_cleanup(struct tc_action *a, int bind)
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+{
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+ if (a->priv)
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+ return tcf_hash_release(a->priv, bind, &connmark_hash_info);
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+ return 0;
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+}
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+
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+static inline int tcf_connmark_dump(struct sk_buff *skb, struct tc_action *a,
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+ int bind, int ref)
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+{
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+ return skb->len;
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+}
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+
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+static struct tc_action_ops act_connmark_ops = {
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+ .kind = "connmark",
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+ .hinfo = &connmark_hash_info,
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+ .type = TCA_ACT_CONNMARK,
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+ .capab = TCA_CAP_NONE,
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+ .owner = THIS_MODULE,
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+ .act = tcf_connmark,
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+ .dump = tcf_connmark_dump,
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+ .cleanup = tcf_connmark_cleanup,
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+ .init = tcf_connmark_init,
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+ .walk = tcf_generic_walker,
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+};
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+
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+MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
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+MODULE_DESCRIPTION("Connection tracking mark restoring");
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+MODULE_LICENSE("GPL");
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+
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+static int __init connmark_init_module(void)
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+{
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+ return tcf_register_action(&act_connmark_ops);
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+}
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+
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+static void __exit connmark_cleanup_module(void)
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+{
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+ tcf_unregister_action(&act_connmark_ops);
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+}
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+
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+module_init(connmark_init_module);
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+module_exit(connmark_cleanup_module);
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--- a/net/sched/Kconfig
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+++ b/net/sched/Kconfig
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@@ -670,6 +670,19 @@ config NET_ACT_CSUM
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To compile this code as a module, choose M here: the
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module will be called act_csum.
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+config NET_ACT_CONNMARK
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+ tristate "Connection Tracking Marking"
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+ depends on NET_CLS_ACT
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+ depends on NF_CONNTRACK
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+ depends on NF_CONNTRACK_MARK
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+ ---help---
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+ Say Y here to restore the connmark from a scheduler action
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+
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+ If unsure, say N.
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+
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+ To compile this code as a module, choose M here: the
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+ module will be called act_connmark.
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+
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config NET_CLS_IND
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bool "Incoming device classification"
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depends on NET_CLS_U32 || NET_CLS_FW
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--- a/net/sched/Makefile
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+++ b/net/sched/Makefile
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@@ -16,6 +16,7 @@ obj-$(CONFIG_NET_ACT_PEDIT) += act_pedit
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obj-$(CONFIG_NET_ACT_SIMP) += act_simple.o
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obj-$(CONFIG_NET_ACT_SKBEDIT) += act_skbedit.o
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obj-$(CONFIG_NET_ACT_CSUM) += act_csum.o
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+obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o
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obj-$(CONFIG_NET_SCH_FIFO) += sch_fifo.o
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obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o
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obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o
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