netfilter: nf_tables: add tunnel support

This patch implements the tunnel object type that can be used to
configure tunnels via metadata template through the existing lightweight
API from the ingress path.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2018-08-02 20:51:39 +02:00
parent 033eab53ff
commit af308b94a2
5 changed files with 534 additions and 1 deletions

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@ -1416,7 +1416,8 @@ enum nft_ct_helper_attributes {
#define NFT_OBJECT_CT_HELPER 3 #define NFT_OBJECT_CT_HELPER 3
#define NFT_OBJECT_LIMIT 4 #define NFT_OBJECT_LIMIT 4
#define NFT_OBJECT_CONNLIMIT 5 #define NFT_OBJECT_CONNLIMIT 5
#define __NFT_OBJECT_MAX 6 #define NFT_OBJECT_TUNNEL 6
#define __NFT_OBJECT_MAX 7
#define NFT_OBJECT_MAX (__NFT_OBJECT_MAX - 1) #define NFT_OBJECT_MAX (__NFT_OBJECT_MAX - 1)
/** /**
@ -1580,4 +1581,70 @@ enum nft_ng_types {
}; };
#define NFT_NG_MAX (__NFT_NG_MAX - 1) #define NFT_NG_MAX (__NFT_NG_MAX - 1)
enum nft_tunnel_key_ip_attributes {
NFTA_TUNNEL_KEY_IP_UNSPEC,
NFTA_TUNNEL_KEY_IP_SRC,
NFTA_TUNNEL_KEY_IP_DST,
__NFTA_TUNNEL_KEY_IP_MAX
};
#define NFTA_TUNNEL_KEY_IP_MAX (__NFTA_TUNNEL_KEY_IP_MAX - 1)
enum nft_tunnel_ip6_attributes {
NFTA_TUNNEL_KEY_IP6_UNSPEC,
NFTA_TUNNEL_KEY_IP6_SRC,
NFTA_TUNNEL_KEY_IP6_DST,
NFTA_TUNNEL_KEY_IP6_FLOWLABEL,
__NFTA_TUNNEL_KEY_IP6_MAX
};
#define NFTA_TUNNEL_KEY_IP6_MAX (__NFTA_TUNNEL_KEY_IP6_MAX - 1)
enum nft_tunnel_opts_attributes {
NFTA_TUNNEL_KEY_OPTS_UNSPEC,
NFTA_TUNNEL_KEY_OPTS_VXLAN,
NFTA_TUNNEL_KEY_OPTS_ERSPAN,
__NFTA_TUNNEL_KEY_OPTS_MAX
};
#define NFTA_TUNNEL_KEY_OPTS_MAX (__NFTA_TUNNEL_KEY_OPTS_MAX - 1)
enum nft_tunnel_opts_vxlan_attributes {
NFTA_TUNNEL_KEY_VXLAN_UNSPEC,
NFTA_TUNNEL_KEY_VXLAN_GBP,
__NFTA_TUNNEL_KEY_VXLAN_MAX
};
#define NFTA_TUNNEL_KEY_VXLAN_MAX (__NFTA_TUNNEL_KEY_VXLAN_MAX - 1)
enum nft_tunnel_opts_erspan_attributes {
NFTA_TUNNEL_KEY_ERSPAN_UNSPEC,
NFTA_TUNNEL_KEY_ERSPAN_VERSION,
NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX,
NFTA_TUNNEL_KEY_ERSPAN_V2_HWID,
NFTA_TUNNEL_KEY_ERSPAN_V2_DIR,
__NFTA_TUNNEL_KEY_ERSPAN_MAX
};
#define NFTA_TUNNEL_KEY_ERSPAN_MAX (__NFTA_TUNNEL_KEY_ERSPAN_MAX - 1)
enum nft_tunnel_flags {
NFT_TUNNEL_F_ZERO_CSUM_TX = (1 << 0),
NFT_TUNNEL_F_DONT_FRAGMENT = (1 << 1),
NFT_TUNNEL_F_SEQ_NUMBER = (1 << 2),
};
#define NFT_TUNNEL_F_MASK (NFT_TUNNEL_F_ZERO_CSUM_TX | \
NFT_TUNNEL_F_DONT_FRAGMENT | \
NFT_TUNNEL_F_SEQ_NUMBER)
enum nft_tunnel_key_attributes {
NFTA_TUNNEL_KEY_UNSPEC,
NFTA_TUNNEL_KEY_ID,
NFTA_TUNNEL_KEY_IP,
NFTA_TUNNEL_KEY_IP6,
NFTA_TUNNEL_KEY_FLAGS,
NFTA_TUNNEL_KEY_TOS,
NFTA_TUNNEL_KEY_TTL,
NFTA_TUNNEL_KEY_SPORT,
NFTA_TUNNEL_KEY_DPORT,
NFTA_TUNNEL_KEY_OPTS,
__NFTA_TUNNEL_KEY_MAX
};
#define NFTA_TUNNEL_KEY_MAX (__NFTA_TUNNEL_KEY_MAX - 1)
#endif /* _LINUX_NF_TABLES_H */ #endif /* _LINUX_NF_TABLES_H */

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@ -307,6 +307,7 @@ void metadata_dst_free(struct metadata_dst *md_dst)
#endif #endif
kfree(md_dst); kfree(md_dst);
} }
EXPORT_SYMBOL_GPL(metadata_dst_free);
struct metadata_dst __percpu * struct metadata_dst __percpu *
metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags) metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags)

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@ -559,6 +559,12 @@ config NFT_NAT
This option adds the "nat" expression that you can use to perform This option adds the "nat" expression that you can use to perform
typical Network Address Translation (NAT) packet transformations. typical Network Address Translation (NAT) packet transformations.
config NFT_TUNNEL
tristate "Netfilter nf_tables tunnel module"
help
This option adds the "tunnel" expression that you can use to set
tunneling policies.
config NFT_OBJREF config NFT_OBJREF
tristate "Netfilter nf_tables stateful object reference module" tristate "Netfilter nf_tables stateful object reference module"
help help

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@ -101,6 +101,7 @@ obj-$(CONFIG_NFT_QUEUE) += nft_queue.o
obj-$(CONFIG_NFT_QUOTA) += nft_quota.o obj-$(CONFIG_NFT_QUOTA) += nft_quota.o
obj-$(CONFIG_NFT_REJECT) += nft_reject.o obj-$(CONFIG_NFT_REJECT) += nft_reject.o
obj-$(CONFIG_NFT_REJECT_INET) += nft_reject_inet.o obj-$(CONFIG_NFT_REJECT_INET) += nft_reject_inet.o
obj-$(CONFIG_NFT_TUNNEL) += nft_tunnel.o
obj-$(CONFIG_NFT_COUNTER) += nft_counter.o obj-$(CONFIG_NFT_COUNTER) += nft_counter.o
obj-$(CONFIG_NFT_LOG) += nft_log.o obj-$(CONFIG_NFT_LOG) += nft_log.o
obj-$(CONFIG_NFT_MASQ) += nft_masq.o obj-$(CONFIG_NFT_MASQ) += nft_masq.o

458
net/netfilter/nft_tunnel.c Normal file
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@ -0,0 +1,458 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/seqlock.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/dst_metadata.h>
#include <net/ip_tunnels.h>
#include <net/vxlan.h>
#include <net/erspan.h>
struct nft_tunnel_opts {
union {
struct vxlan_metadata vxlan;
struct erspan_metadata erspan;
} u;
u32 len;
u32 flags;
};
struct nft_tunnel_obj {
struct metadata_dst *md;
struct nft_tunnel_opts opts;
};
static const struct nla_policy nft_tunnel_ip_policy[NFTA_TUNNEL_KEY_IP_MAX + 1] = {
[NFTA_TUNNEL_KEY_IP_SRC] = { .type = NLA_U32 },
[NFTA_TUNNEL_KEY_IP_DST] = { .type = NLA_U32 },
};
static int nft_tunnel_obj_ip_init(const struct nft_ctx *ctx,
const struct nlattr *attr,
struct ip_tunnel_info *info)
{
struct nlattr *tb[NFTA_TUNNEL_KEY_IP_MAX + 1];
int err;
err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_IP_MAX, attr,
nft_tunnel_ip_policy, NULL);
if (err < 0)
return err;
if (!tb[NFTA_TUNNEL_KEY_IP_DST])
return -EINVAL;
if (tb[NFTA_TUNNEL_KEY_IP_SRC])
info->key.u.ipv4.src = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_SRC]);
if (tb[NFTA_TUNNEL_KEY_IP_DST])
info->key.u.ipv4.dst = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_DST]);
return 0;
}
static const struct nla_policy nft_tunnel_ip6_policy[NFTA_TUNNEL_KEY_IP6_MAX + 1] = {
[NFTA_TUNNEL_KEY_IP6_SRC] = { .len = sizeof(struct in6_addr), },
[NFTA_TUNNEL_KEY_IP6_DST] = { .len = sizeof(struct in6_addr), },
[NFTA_TUNNEL_KEY_IP6_FLOWLABEL] = { .type = NLA_U32, }
};
static int nft_tunnel_obj_ip6_init(const struct nft_ctx *ctx,
const struct nlattr *attr,
struct ip_tunnel_info *info)
{
struct nlattr *tb[NFTA_TUNNEL_KEY_IP6_MAX + 1];
int err;
err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_IP6_MAX, attr,
nft_tunnel_ip6_policy, NULL);
if (err < 0)
return err;
if (!tb[NFTA_TUNNEL_KEY_IP6_DST])
return -EINVAL;
if (tb[NFTA_TUNNEL_KEY_IP6_SRC]) {
memcpy(&info->key.u.ipv6.src,
nla_data(tb[NFTA_TUNNEL_KEY_IP6_SRC]),
sizeof(struct in6_addr));
}
if (tb[NFTA_TUNNEL_KEY_IP6_DST]) {
memcpy(&info->key.u.ipv6.dst,
nla_data(tb[NFTA_TUNNEL_KEY_IP6_DST]),
sizeof(struct in6_addr));
}
if (tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL])
info->key.label = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL]);
info->mode |= IP_TUNNEL_INFO_IPV6;
return 0;
}
static const struct nla_policy nft_tunnel_opts_vxlan_policy[NFTA_TUNNEL_KEY_VXLAN_MAX + 1] = {
[NFTA_TUNNEL_KEY_VXLAN_GBP] = { .type = NLA_U32 },
};
static int nft_tunnel_obj_vxlan_init(const struct nlattr *attr,
struct nft_tunnel_opts *opts)
{
struct nlattr *tb[NFTA_TUNNEL_KEY_VXLAN_MAX + 1];
int err;
err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_VXLAN_MAX, attr,
nft_tunnel_opts_vxlan_policy, NULL);
if (err < 0)
return err;
if (!tb[NFTA_TUNNEL_KEY_VXLAN_GBP])
return -EINVAL;
opts->u.vxlan.gbp = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_VXLAN_GBP]));
opts->len = sizeof(struct vxlan_metadata);
opts->flags = TUNNEL_VXLAN_OPT;
return 0;
}
static const struct nla_policy nft_tunnel_opts_erspan_policy[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1] = {
[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX] = { .type = NLA_U32 },
[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] = { .type = NLA_U8 },
[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID] = { .type = NLA_U8 },
};
static int nft_tunnel_obj_erspan_init(const struct nlattr *attr,
struct nft_tunnel_opts *opts)
{
struct nlattr *tb[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1];
uint8_t hwid, dir;
int err, version;
err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_ERSPAN_MAX, attr,
nft_tunnel_opts_erspan_policy, NULL);
if (err < 0)
return err;
version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]));
switch (version) {
case ERSPAN_VERSION:
if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX])
return -EINVAL;
opts->u.erspan.u.index =
nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX]);
break;
case ERSPAN_VERSION2:
if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] ||
!tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID])
return -EINVAL;
hwid = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID]);
dir = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR]);
set_hwid(&opts->u.erspan.u.md2, hwid);
opts->u.erspan.u.md2.dir = dir;
break;
default:
return -EOPNOTSUPP;
}
opts->u.erspan.version = version;
opts->len = sizeof(struct erspan_metadata);
opts->flags = TUNNEL_ERSPAN_OPT;
return 0;
}
static const struct nla_policy nft_tunnel_opts_policy[NFTA_TUNNEL_KEY_OPTS_MAX + 1] = {
[NFTA_TUNNEL_KEY_OPTS_VXLAN] = { .type = NLA_NESTED, },
[NFTA_TUNNEL_KEY_OPTS_ERSPAN] = { .type = NLA_NESTED, },
};
static int nft_tunnel_obj_opts_init(const struct nft_ctx *ctx,
const struct nlattr *attr,
struct ip_tunnel_info *info,
struct nft_tunnel_opts *opts)
{
struct nlattr *tb[NFTA_TUNNEL_KEY_OPTS_MAX + 1];
int err;
err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_OPTS_MAX, attr,
nft_tunnel_opts_policy, NULL);
if (err < 0)
return err;
if (tb[NFTA_TUNNEL_KEY_OPTS_VXLAN]) {
err = nft_tunnel_obj_vxlan_init(tb[NFTA_TUNNEL_KEY_OPTS_VXLAN],
opts);
} else if (tb[NFTA_TUNNEL_KEY_OPTS_ERSPAN]) {
err = nft_tunnel_obj_erspan_init(tb[NFTA_TUNNEL_KEY_OPTS_ERSPAN],
opts);
} else {
return -EOPNOTSUPP;
}
return err;
}
static const struct nla_policy nft_tunnel_key_policy[NFTA_TUNNEL_KEY_MAX + 1] = {
[NFTA_TUNNEL_KEY_IP] = { .type = NLA_NESTED, },
[NFTA_TUNNEL_KEY_IP6] = { .type = NLA_NESTED, },
[NFTA_TUNNEL_KEY_ID] = { .type = NLA_U32, },
[NFTA_TUNNEL_KEY_FLAGS] = { .type = NLA_U32, },
[NFTA_TUNNEL_KEY_TOS] = { .type = NLA_U8, },
[NFTA_TUNNEL_KEY_TTL] = { .type = NLA_U8, },
[NFTA_TUNNEL_KEY_OPTS] = { .type = NLA_NESTED, },
};
static int nft_tunnel_obj_init(const struct nft_ctx *ctx,
const struct nlattr * const tb[],
struct nft_object *obj)
{
struct nft_tunnel_obj *priv = nft_obj_data(obj);
struct ip_tunnel_info info;
struct metadata_dst *md;
int err;
if (!tb[NFTA_TUNNEL_KEY_ID])
return -EINVAL;
memset(&info, 0, sizeof(info));
info.mode = IP_TUNNEL_INFO_TX;
info.key.tun_id = key32_to_tunnel_id(nla_get_be32(tb[NFTA_TUNNEL_KEY_ID]));
info.key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM | TUNNEL_NOCACHE;
if (tb[NFTA_TUNNEL_KEY_IP]) {
err = nft_tunnel_obj_ip_init(ctx, tb[NFTA_TUNNEL_KEY_IP], &info);
if (err < 0)
return err;
} else if (tb[NFTA_TUNNEL_KEY_IP6]) {
err = nft_tunnel_obj_ip6_init(ctx, tb[NFTA_TUNNEL_KEY_IP6], &info);
if (err < 0)
return err;
} else {
return -EINVAL;
}
if (tb[NFTA_TUNNEL_KEY_SPORT]) {
info.key.tp_src =
ntohs(nla_get_be16(tb[NFTA_TUNNEL_KEY_SPORT]));
}
if (tb[NFTA_TUNNEL_KEY_DPORT]) {
info.key.tp_dst =
ntohs(nla_get_be16(tb[NFTA_TUNNEL_KEY_DPORT]));
}
if (tb[NFTA_TUNNEL_KEY_FLAGS]) {
u32 tun_flags;
tun_flags = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_FLAGS]));
if (tun_flags & ~NFT_TUNNEL_F_MASK)
return -EOPNOTSUPP;
if (tun_flags & NFT_TUNNEL_F_ZERO_CSUM_TX)
info.key.tun_flags &= ~TUNNEL_CSUM;
if (tun_flags & NFT_TUNNEL_F_DONT_FRAGMENT)
info.key.tun_flags |= TUNNEL_DONT_FRAGMENT;
if (tun_flags & NFT_TUNNEL_F_SEQ_NUMBER)
info.key.tun_flags |= TUNNEL_SEQ;
}
if (tb[NFTA_TUNNEL_KEY_TOS])
info.key.tos = nla_get_u8(tb[NFTA_TUNNEL_KEY_TOS]);
if (tb[NFTA_TUNNEL_KEY_TTL])
info.key.ttl = nla_get_u8(tb[NFTA_TUNNEL_KEY_TTL]);
else
info.key.ttl = U8_MAX;
if (tb[NFTA_TUNNEL_KEY_OPTS]) {
err = nft_tunnel_obj_opts_init(ctx, tb[NFTA_TUNNEL_KEY_OPTS],
&info, &priv->opts);
if (err < 0)
return err;
}
md = metadata_dst_alloc(priv->opts.len, METADATA_IP_TUNNEL, GFP_KERNEL);
if (!md)
return -ENOMEM;
memcpy(&md->u.tun_info, &info, sizeof(info));
ip_tunnel_info_opts_set(&md->u.tun_info, &priv->opts.u, priv->opts.len,
priv->opts.flags);
priv->md = md;
return 0;
}
static inline void nft_tunnel_obj_eval(struct nft_object *obj,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
struct nft_tunnel_obj *priv = nft_obj_data(obj);
struct sk_buff *skb = pkt->skb;
skb_dst_drop(skb);
dst_hold((struct dst_entry *) priv->md);
skb_dst_set(skb, (struct dst_entry *) priv->md);
}
static int nft_tunnel_ip_dump(struct sk_buff *skb, struct ip_tunnel_info *info)
{
struct nlattr *nest;
if (info->mode & IP_TUNNEL_INFO_IPV6) {
nest = nla_nest_start(skb, NFTA_TUNNEL_KEY_IP6);
if (!nest)
return -1;
if (nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_SRC, &info->key.u.ipv6.src) < 0 ||
nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_DST, &info->key.u.ipv6.dst) < 0 ||
nla_put_be32(skb, NFTA_TUNNEL_KEY_IP6_FLOWLABEL, info->key.label))
return -1;
nla_nest_end(skb, nest);
} else {
nest = nla_nest_start(skb, NFTA_TUNNEL_KEY_IP);
if (!nest)
return -1;
if (nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_SRC, info->key.u.ipv4.src) < 0 ||
nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_DST, info->key.u.ipv4.dst) < 0)
return -1;
nla_nest_end(skb, nest);
}
return 0;
}
static int nft_tunnel_opts_dump(struct sk_buff *skb,
struct nft_tunnel_obj *priv)
{
struct nft_tunnel_opts *opts = &priv->opts;
struct nlattr *nest;
nest = nla_nest_start(skb, NFTA_TUNNEL_KEY_OPTS);
if (!nest)
return -1;
if (opts->flags & TUNNEL_VXLAN_OPT) {
if (nla_put_be32(skb, NFTA_TUNNEL_KEY_VXLAN_GBP,
htonl(opts->u.vxlan.gbp)))
return -1;
} else if (opts->flags & TUNNEL_ERSPAN_OPT) {
switch (opts->u.erspan.version) {
case ERSPAN_VERSION:
if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX,
opts->u.erspan.u.index))
return -1;
break;
case ERSPAN_VERSION2:
if (nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_HWID,
get_hwid(&opts->u.erspan.u.md2)) ||
nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_DIR,
opts->u.erspan.u.md2.dir))
return -1;
break;
}
}
nla_nest_end(skb, nest);
return 0;
}
static int nft_tunnel_ports_dump(struct sk_buff *skb,
struct ip_tunnel_info *info)
{
if (nla_put_be16(skb, NFTA_TUNNEL_KEY_SPORT, htons(info->key.tp_src)) < 0 ||
nla_put_be16(skb, NFTA_TUNNEL_KEY_DPORT, htons(info->key.tp_dst)) < 0)
return -1;
return 0;
}
static int nft_tunnel_flags_dump(struct sk_buff *skb,
struct ip_tunnel_info *info)
{
u32 flags = 0;
if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
flags |= NFT_TUNNEL_F_DONT_FRAGMENT;
if (!(info->key.tun_flags & TUNNEL_CSUM))
flags |= NFT_TUNNEL_F_ZERO_CSUM_TX;
if (info->key.tun_flags & TUNNEL_SEQ)
flags |= NFT_TUNNEL_F_SEQ_NUMBER;
if (nla_put_be32(skb, NFTA_TUNNEL_KEY_FLAGS, htonl(flags)) < 0)
return -1;
return 0;
}
static int nft_tunnel_obj_dump(struct sk_buff *skb,
struct nft_object *obj, bool reset)
{
struct nft_tunnel_obj *priv = nft_obj_data(obj);
struct ip_tunnel_info *info = &priv->md->u.tun_info;
if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ID,
tunnel_id_to_key32(info->key.tun_id)) ||
nft_tunnel_ip_dump(skb, info) < 0 ||
nft_tunnel_ports_dump(skb, info) < 0 ||
nft_tunnel_flags_dump(skb, info) < 0 ||
nla_put_u8(skb, NFTA_TUNNEL_KEY_TOS, info->key.tos) ||
nla_put_u8(skb, NFTA_TUNNEL_KEY_TTL, info->key.ttl) ||
nft_tunnel_opts_dump(skb, priv) < 0)
goto nla_put_failure;
return 0;
nla_put_failure:
return -1;
}
static void nft_tunnel_obj_destroy(const struct nft_ctx *ctx,
struct nft_object *obj)
{
struct nft_tunnel_obj *priv = nft_obj_data(obj);
metadata_dst_free(priv->md);
}
static struct nft_object_type nft_tunnel_obj_type;
static const struct nft_object_ops nft_tunnel_obj_ops = {
.type = &nft_tunnel_obj_type,
.size = sizeof(struct nft_tunnel_obj),
.eval = nft_tunnel_obj_eval,
.init = nft_tunnel_obj_init,
.destroy = nft_tunnel_obj_destroy,
.dump = nft_tunnel_obj_dump,
};
static struct nft_object_type nft_tunnel_obj_type __read_mostly = {
.type = NFT_OBJECT_TUNNEL,
.ops = &nft_tunnel_obj_ops,
.maxattr = NFTA_TUNNEL_KEY_MAX,
.policy = nft_tunnel_key_policy,
.owner = THIS_MODULE,
};
static int __init nft_tunnel_module_init(void)
{
return nft_register_obj(&nft_tunnel_obj_type);
}
static void __exit nft_tunnel_module_exit(void)
{
nft_unregister_obj(&nft_tunnel_obj_type);
}
module_init(nft_tunnel_module_init);
module_exit(nft_tunnel_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_TUNNEL);