summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorJakub Kicinski <kuba@kernel.org>2020-10-13 01:00:36 +0300
committerJakub Kicinski <kuba@kernel.org>2020-10-13 01:00:36 +0300
commita308283fdbf712b30061d2b4567530eb9e8dc1b4 (patch)
tree87b1477a7d57f6b0c3f189ecfb1e0923b4c1f413 /net
parent547848af58e3eb5a0d8b0a5e6433042f111788e2 (diff)
parent793d5d61242695142460ce74f124281e0681fbc7 (diff)
downloadlinux-a308283fdbf712b30061d2b4567530eb9e8dc1b4.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next The following patchset contains Netfilter/IPVS updates for net-next: 1) Inspect the reply packets coming from DR/TUN and refresh connection state and timeout, from longguang yue and Julian Anastasov. 2) Series to add support for the inet ingress chain type in nf_tables. ==================== Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/core.c129
-rw-r--r--net/netfilter/ipvs/ip_vs_conn.c18
-rw-r--r--net/netfilter/ipvs/ip_vs_core.c19
-rw-r--r--net/netfilter/nf_flow_table_core.c12
-rw-r--r--net/netfilter/nf_flow_table_ip.c45
-rw-r--r--net/netfilter/nf_tables_api.c14
-rw-r--r--net/netfilter/nft_chain_filter.c35
7 files changed, 196 insertions, 76 deletions
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 3ac7c8c1548d..63d032191e62 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -282,6 +282,16 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
return NULL;
return net->nf.hooks_bridge + hooknum;
#endif
+#ifdef CONFIG_NETFILTER_INGRESS
+ case NFPROTO_INET:
+ if (WARN_ON_ONCE(hooknum != NF_INET_INGRESS))
+ return NULL;
+ if (!dev || dev_net(dev) != net) {
+ WARN_ON_ONCE(1);
+ return NULL;
+ }
+ return &dev->nf_hooks_ingress;
+#endif
case NFPROTO_IPV4:
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= hooknum))
return NULL;
@@ -311,20 +321,80 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
return NULL;
}
+static int nf_ingress_check(struct net *net, const struct nf_hook_ops *reg,
+ int hooknum)
+{
+#ifndef CONFIG_NETFILTER_INGRESS
+ if (reg->hooknum == hooknum)
+ return -EOPNOTSUPP;
+#endif
+ if (reg->hooknum != hooknum ||
+ !reg->dev || dev_net(reg->dev) != net)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline bool nf_ingress_hook(const struct nf_hook_ops *reg, int pf)
+{
+ if ((pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS) ||
+ (pf == NFPROTO_INET && reg->hooknum == NF_INET_INGRESS))
+ return true;
+
+ return false;
+}
+
+static void nf_static_key_inc(const struct nf_hook_ops *reg, int pf)
+{
+#ifdef CONFIG_JUMP_LABEL
+ int hooknum;
+
+ if (pf == NFPROTO_INET && reg->hooknum == NF_INET_INGRESS) {
+ pf = NFPROTO_NETDEV;
+ hooknum = NF_NETDEV_INGRESS;
+ } else {
+ hooknum = reg->hooknum;
+ }
+ static_key_slow_inc(&nf_hooks_needed[pf][hooknum]);
+#endif
+}
+
+static void nf_static_key_dec(const struct nf_hook_ops *reg, int pf)
+{
+#ifdef CONFIG_JUMP_LABEL
+ int hooknum;
+
+ if (pf == NFPROTO_INET && reg->hooknum == NF_INET_INGRESS) {
+ pf = NFPROTO_NETDEV;
+ hooknum = NF_NETDEV_INGRESS;
+ } else {
+ hooknum = reg->hooknum;
+ }
+ static_key_slow_dec(&nf_hooks_needed[pf][hooknum]);
+#endif
+}
+
static int __nf_register_net_hook(struct net *net, int pf,
const struct nf_hook_ops *reg)
{
struct nf_hook_entries *p, *new_hooks;
struct nf_hook_entries __rcu **pp;
+ int err;
- if (pf == NFPROTO_NETDEV) {
-#ifndef CONFIG_NETFILTER_INGRESS
- if (reg->hooknum == NF_NETDEV_INGRESS)
- return -EOPNOTSUPP;
-#endif
- if (reg->hooknum != NF_NETDEV_INGRESS ||
- !reg->dev || dev_net(reg->dev) != net)
- return -EINVAL;
+ switch (pf) {
+ case NFPROTO_NETDEV:
+ err = nf_ingress_check(net, reg, NF_NETDEV_INGRESS);
+ if (err < 0)
+ return err;
+ break;
+ case NFPROTO_INET:
+ if (reg->hooknum != NF_INET_INGRESS)
+ break;
+
+ err = nf_ingress_check(net, reg, NF_INET_INGRESS);
+ if (err < 0)
+ return err;
+ break;
}
pp = nf_hook_entry_head(net, pf, reg->hooknum, reg->dev);
@@ -345,12 +415,11 @@ static int __nf_register_net_hook(struct net *net, int pf,
hooks_validate(new_hooks);
#ifdef CONFIG_NETFILTER_INGRESS
- if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
+ if (nf_ingress_hook(reg, pf))
net_inc_ingress_queue();
#endif
-#ifdef CONFIG_JUMP_LABEL
- static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]);
-#endif
+ nf_static_key_inc(reg, pf);
+
BUG_ON(p == new_hooks);
nf_hook_entries_free(p);
return 0;
@@ -403,12 +472,10 @@ static void __nf_unregister_net_hook(struct net *net, int pf,
if (nf_remove_net_hook(p, reg)) {
#ifdef CONFIG_NETFILTER_INGRESS
- if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
+ if (nf_ingress_hook(reg, pf))
net_dec_ingress_queue();
#endif
-#ifdef CONFIG_JUMP_LABEL
- static_key_slow_dec(&nf_hooks_needed[pf][reg->hooknum]);
-#endif
+ nf_static_key_dec(reg, pf);
} else {
WARN_ONCE(1, "hook not found, pf %d num %d", pf, reg->hooknum);
}
@@ -425,8 +492,12 @@ static void __nf_unregister_net_hook(struct net *net, int pf,
void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
{
if (reg->pf == NFPROTO_INET) {
- __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
- __nf_unregister_net_hook(net, NFPROTO_IPV6, reg);
+ if (reg->hooknum == NF_INET_INGRESS) {
+ __nf_unregister_net_hook(net, NFPROTO_INET, reg);
+ } else {
+ __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
+ __nf_unregister_net_hook(net, NFPROTO_IPV6, reg);
+ }
} else {
__nf_unregister_net_hook(net, reg->pf, reg);
}
@@ -451,14 +522,20 @@ int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
int err;
if (reg->pf == NFPROTO_INET) {
- err = __nf_register_net_hook(net, NFPROTO_IPV4, reg);
- if (err < 0)
- return err;
-
- err = __nf_register_net_hook(net, NFPROTO_IPV6, reg);
- if (err < 0) {
- __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
- return err;
+ if (reg->hooknum == NF_INET_INGRESS) {
+ err = __nf_register_net_hook(net, NFPROTO_INET, reg);
+ if (err < 0)
+ return err;
+ } else {
+ err = __nf_register_net_hook(net, NFPROTO_IPV4, reg);
+ if (err < 0)
+ return err;
+
+ err = __nf_register_net_hook(net, NFPROTO_IPV6, reg);
+ if (err < 0) {
+ __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
+ return err;
+ }
}
} else {
err = __nf_register_net_hook(net, reg->pf, reg);
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index a90b8eac16ac..c100c6b112c8 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -402,6 +402,8 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
{
unsigned int hash;
struct ip_vs_conn *cp, *ret=NULL;
+ const union nf_inet_addr *saddr;
+ __be16 sport;
/*
* Check for "full" addressed entries
@@ -411,10 +413,20 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
rcu_read_lock();
hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[hash], c_list) {
- if (p->vport == cp->cport && p->cport == cp->dport &&
- cp->af == p->af &&
+ if (p->vport != cp->cport)
+ continue;
+
+ if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ) {
+ sport = cp->vport;
+ saddr = &cp->vaddr;
+ } else {
+ sport = cp->dport;
+ saddr = &cp->daddr;
+ }
+
+ if (p->cport == sport && cp->af == p->af &&
ip_vs_addr_equal(p->af, p->vaddr, &cp->caddr) &&
- ip_vs_addr_equal(p->af, p->caddr, &cp->daddr) &&
+ ip_vs_addr_equal(p->af, p->caddr, saddr) &&
p->protocol == cp->protocol &&
cp->ipvs == p->ipvs) {
if (!__ip_vs_conn_get(cp))
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index e3668a6e54e4..cc3c275934f4 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -875,7 +875,7 @@ static int handle_response_icmp(int af, struct sk_buff *skb,
unsigned int verdict = NF_DROP;
if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
- goto ignore_cp;
+ goto after_nat;
/* Ensure the checksum is correct */
if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) {
@@ -901,6 +901,7 @@ static int handle_response_icmp(int af, struct sk_buff *skb,
if (ip_vs_route_me_harder(cp->ipvs, af, skb, hooknum))
goto out;
+after_nat:
/* do the statistics and put it back */
ip_vs_out_stats(cp, skb);
@@ -909,8 +910,6 @@ static int handle_response_icmp(int af, struct sk_buff *skb,
ip_vs_notrack(skb);
else
ip_vs_update_conntrack(skb, cp, 0);
-
-ignore_cp:
verdict = NF_ACCEPT;
out:
@@ -1276,6 +1275,9 @@ handle_response(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
{
struct ip_vs_protocol *pp = pd->pp;
+ if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
+ goto after_nat;
+
IP_VS_DBG_PKT(11, af, pp, skb, iph->off, "Outgoing packet");
if (skb_ensure_writable(skb, iph->len))
@@ -1316,6 +1318,7 @@ handle_response(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
IP_VS_DBG_PKT(10, af, pp, skb, iph->off, "After SNAT");
+after_nat:
ip_vs_out_stats(cp, skb);
ip_vs_set_state(cp, IP_VS_DIR_OUTPUT, skb, pd);
skb->ipvs_property = 1;
@@ -1412,11 +1415,8 @@ ip_vs_out(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, in
cp = INDIRECT_CALL_1(pp->conn_out_get, ip_vs_conn_out_get_proto,
ipvs, af, skb, &iph);
- if (likely(cp)) {
- if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
- goto ignore_cp;
+ if (likely(cp))
return handle_response(af, skb, pd, cp, &iph, hooknum);
- }
/* Check for real-server-started requests */
if (atomic_read(&ipvs->conn_out_counter)) {
@@ -1475,14 +1475,9 @@ ip_vs_out(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, in
}
}
-out:
IP_VS_DBG_PKT(12, af, pp, skb, iph.off,
"ip_vs_out: packet continues traversal as normal");
return NF_ACCEPT;
-
-ignore_cp:
- __ip_vs_conn_put(cp);
- goto out;
}
/*
diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 4f7a567c536e..513f78db3cb2 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -395,8 +395,7 @@ static int nf_flow_nat_port_tcp(struct sk_buff *skb, unsigned int thoff,
{
struct tcphdr *tcph;
- if (!pskb_may_pull(skb, thoff + sizeof(*tcph)) ||
- skb_try_make_writable(skb, thoff + sizeof(*tcph)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*tcph)))
return -1;
tcph = (void *)(skb_network_header(skb) + thoff);
@@ -410,8 +409,7 @@ static int nf_flow_nat_port_udp(struct sk_buff *skb, unsigned int thoff,
{
struct udphdr *udph;
- if (!pskb_may_pull(skb, thoff + sizeof(*udph)) ||
- skb_try_make_writable(skb, thoff + sizeof(*udph)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*udph)))
return -1;
udph = (void *)(skb_network_header(skb) + thoff);
@@ -449,8 +447,7 @@ int nf_flow_snat_port(const struct flow_offload *flow,
struct flow_ports *hdr;
__be16 port, new_port;
- if (!pskb_may_pull(skb, thoff + sizeof(*hdr)) ||
- skb_try_make_writable(skb, thoff + sizeof(*hdr)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*hdr)))
return -1;
hdr = (void *)(skb_network_header(skb) + thoff);
@@ -481,8 +478,7 @@ int nf_flow_dnat_port(const struct flow_offload *flow,
struct flow_ports *hdr;
__be16 port, new_port;
- if (!pskb_may_pull(skb, thoff + sizeof(*hdr)) ||
- skb_try_make_writable(skb, thoff + sizeof(*hdr)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*hdr)))
return -1;
hdr = (void *)(skb_network_header(skb) + thoff);
diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index a3bca758b849..a698dbe28ef5 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -25,9 +25,6 @@ static int nf_flow_state_check(struct flow_offload *flow, int proto,
if (proto != IPPROTO_TCP)
return 0;
- if (!pskb_may_pull(skb, thoff + sizeof(*tcph)))
- return -1;
-
tcph = (void *)(skb_network_header(skb) + thoff);
if (unlikely(tcph->fin || tcph->rst)) {
flow_offload_teardown(flow);
@@ -42,8 +39,7 @@ static int nf_flow_nat_ip_tcp(struct sk_buff *skb, unsigned int thoff,
{
struct tcphdr *tcph;
- if (!pskb_may_pull(skb, thoff + sizeof(*tcph)) ||
- skb_try_make_writable(skb, thoff + sizeof(*tcph)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*tcph)))
return -1;
tcph = (void *)(skb_network_header(skb) + thoff);
@@ -57,8 +53,7 @@ static int nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
{
struct udphdr *udph;
- if (!pskb_may_pull(skb, thoff + sizeof(*udph)) ||
- skb_try_make_writable(skb, thoff + sizeof(*udph)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*udph)))
return -1;
udph = (void *)(skb_network_header(skb) + thoff);
@@ -167,8 +162,8 @@ static bool ip_has_options(unsigned int thoff)
static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
struct flow_offload_tuple *tuple)
{
+ unsigned int thoff, hdrsize;
struct flow_ports *ports;
- unsigned int thoff;
struct iphdr *iph;
if (!pskb_may_pull(skb, sizeof(*iph)))
@@ -181,15 +176,22 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
unlikely(ip_has_options(thoff)))
return -1;
- if (iph->protocol != IPPROTO_TCP &&
- iph->protocol != IPPROTO_UDP)
+ switch (iph->protocol) {
+ case IPPROTO_TCP:
+ hdrsize = sizeof(struct tcphdr);
+ break;
+ case IPPROTO_UDP:
+ hdrsize = sizeof(struct udphdr);
+ break;
+ default:
return -1;
+ }
if (iph->ttl <= 1)
return -1;
thoff = iph->ihl * 4;
- if (!pskb_may_pull(skb, thoff + sizeof(*ports)))
+ if (!pskb_may_pull(skb, thoff + hdrsize))
return -1;
iph = ip_hdr(skb);
@@ -315,8 +317,7 @@ static int nf_flow_nat_ipv6_tcp(struct sk_buff *skb, unsigned int thoff,
{
struct tcphdr *tcph;
- if (!pskb_may_pull(skb, thoff + sizeof(*tcph)) ||
- skb_try_make_writable(skb, thoff + sizeof(*tcph)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*tcph)))
return -1;
tcph = (void *)(skb_network_header(skb) + thoff);
@@ -332,8 +333,7 @@ static int nf_flow_nat_ipv6_udp(struct sk_buff *skb, unsigned int thoff,
{
struct udphdr *udph;
- if (!pskb_may_pull(skb, thoff + sizeof(*udph)) ||
- skb_try_make_writable(skb, thoff + sizeof(*udph)))
+ if (skb_try_make_writable(skb, thoff + sizeof(*udph)))
return -1;
udph = (void *)(skb_network_header(skb) + thoff);
@@ -439,24 +439,31 @@ static int nf_flow_nat_ipv6(const struct flow_offload *flow,
static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
struct flow_offload_tuple *tuple)
{
+ unsigned int thoff, hdrsize;
struct flow_ports *ports;
struct ipv6hdr *ip6h;
- unsigned int thoff;
if (!pskb_may_pull(skb, sizeof(*ip6h)))
return -1;
ip6h = ipv6_hdr(skb);
- if (ip6h->nexthdr != IPPROTO_TCP &&
- ip6h->nexthdr != IPPROTO_UDP)
+ switch (ip6h->nexthdr) {
+ case IPPROTO_TCP:
+ hdrsize = sizeof(struct tcphdr);
+ break;
+ case IPPROTO_UDP:
+ hdrsize = sizeof(struct udphdr);
+ break;
+ default:
return -1;
+ }
if (ip6h->hop_limit <= 1)
return -1;
thoff = sizeof(*ip6h);
- if (!pskb_may_pull(skb, thoff + sizeof(*ports)))
+ if (!pskb_may_pull(skb, thoff + hdrsize))
return -1;
ip6h = ipv6_hdr(skb);
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index ae2c04d411b1..f22ad21d0230 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -206,7 +206,7 @@ static int nf_tables_register_hook(struct net *net,
if (basechain->type->ops_register)
return basechain->type->ops_register(net, ops);
- if (table->family == NFPROTO_NETDEV)
+ if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
return nft_netdev_register_hooks(net, &basechain->hook_list);
return nf_register_net_hook(net, &basechain->ops);
@@ -228,7 +228,7 @@ static void nf_tables_unregister_hook(struct net *net,
if (basechain->type->ops_unregister)
return basechain->type->ops_unregister(net, ops);
- if (table->family == NFPROTO_NETDEV)
+ if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
nft_netdev_unregister_hooks(net, &basechain->hook_list);
else
nf_unregister_net_hook(net, &basechain->ops);
@@ -1381,7 +1381,7 @@ static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
goto nla_put_failure;
- if (family == NFPROTO_NETDEV) {
+ if (nft_base_chain_netdev(family, ops->hooknum)) {
nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
list_for_each_entry(hook, &basechain->hook_list, list) {
if (!first)
@@ -1685,7 +1685,7 @@ void nf_tables_chain_destroy(struct nft_ctx *ctx)
if (nft_is_base_chain(chain)) {
struct nft_base_chain *basechain = nft_base_chain(chain);
- if (ctx->family == NFPROTO_NETDEV) {
+ if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
list_for_each_entry_safe(hook, next,
&basechain->hook_list, list) {
list_del_rcu(&hook->list);
@@ -1877,7 +1877,7 @@ static int nft_chain_parse_hook(struct net *net,
hook->type = type;
INIT_LIST_HEAD(&hook->list);
- if (family == NFPROTO_NETDEV) {
+ if (nft_base_chain_netdev(family, hook->num)) {
err = nft_chain_parse_netdev(net, ha, &hook->list);
if (err < 0) {
module_put(type->owner);
@@ -1944,7 +1944,7 @@ static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
INIT_LIST_HEAD(&basechain->hook_list);
chain = &basechain->chain;
- if (family == NFPROTO_NETDEV) {
+ if (nft_base_chain_netdev(family, hook->num)) {
list_splice_init(&hook->list, &basechain->hook_list);
list_for_each_entry(h, &basechain->hook_list, list)
nft_basechain_hook_init(&h->ops, family, hook, chain);
@@ -2168,7 +2168,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
return -EEXIST;
}
- if (ctx->family == NFPROTO_NETDEV) {
+ if (nft_base_chain_netdev(ctx->family, hook.num)) {
if (!nft_hook_list_equal(&basechain->hook_list,
&hook.list)) {
nft_chain_release_hook(&hook);
diff --git a/net/netfilter/nft_chain_filter.c b/net/netfilter/nft_chain_filter.c
index c78d01bc02e9..ff8528ad3dc6 100644
--- a/net/netfilter/nft_chain_filter.c
+++ b/net/netfilter/nft_chain_filter.c
@@ -161,16 +161,49 @@ static unsigned int nft_do_chain_inet(void *priv, struct sk_buff *skb,
return nft_do_chain(&pkt, priv);
}
+static unsigned int nft_do_chain_inet_ingress(void *priv, struct sk_buff *skb,
+ const struct nf_hook_state *state)
+{
+ struct nf_hook_state ingress_state = *state;
+ struct nft_pktinfo pkt;
+
+ switch (skb->protocol) {
+ case htons(ETH_P_IP):
+ /* Original hook is NFPROTO_NETDEV and NF_NETDEV_INGRESS. */
+ ingress_state.pf = NFPROTO_IPV4;
+ ingress_state.hook = NF_INET_INGRESS;
+ nft_set_pktinfo(&pkt, skb, &ingress_state);
+
+ if (nft_set_pktinfo_ipv4_ingress(&pkt, skb) < 0)
+ return NF_DROP;
+ break;
+ case htons(ETH_P_IPV6):
+ ingress_state.pf = NFPROTO_IPV6;
+ ingress_state.hook = NF_INET_INGRESS;
+ nft_set_pktinfo(&pkt, skb, &ingress_state);
+
+ if (nft_set_pktinfo_ipv6_ingress(&pkt, skb) < 0)
+ return NF_DROP;
+ break;
+ default:
+ return NF_ACCEPT;
+ }
+
+ return nft_do_chain(&pkt, priv);
+}
+
static const struct nft_chain_type nft_chain_filter_inet = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_INET,
- .hook_mask = (1 << NF_INET_LOCAL_IN) |
+ .hook_mask = (1 << NF_INET_INGRESS) |
+ (1 << NF_INET_LOCAL_IN) |
(1 << NF_INET_LOCAL_OUT) |
(1 << NF_INET_FORWARD) |
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_POST_ROUTING),
.hooks = {
+ [NF_INET_INGRESS] = nft_do_chain_inet_ingress,
[NF_INET_LOCAL_IN] = nft_do_chain_inet,
[NF_INET_LOCAL_OUT] = nft_do_chain_inet,
[NF_INET_FORWARD] = nft_do_chain_inet,