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- --- /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, const 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
- @@ -670,6 +670,19 @@ config NET_ACT_CSUM
- To compile this code as a module, choose M here: the
- module will be called act_csum.
-
- +config NET_ACT_CONNMARK
- + tristate "Connection Tracking Marking"
- + depends on NET_CLS_ACT
- + depends on NF_CONNTRACK
- + depends on NF_CONNTRACK_MARK
- + ---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
- @@ -16,6 +16,7 @@ obj-$(CONFIG_NET_ACT_PEDIT) += act_pedit
- obj-$(CONFIG_NET_ACT_SIMP) += act_simple.o
- obj-$(CONFIG_NET_ACT_SKBEDIT) += act_skbedit.o
- obj-$(CONFIG_NET_ACT_CSUM) += act_csum.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
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