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-rw-r--r--net/ipv6/netfilter/Kconfig13
-rw-r--r--net/ipv6/netfilter/Makefile5
-rw-r--r--net/ipv6/netfilter/ip6_tables.c5
-rw-r--r--net/ipv6/netfilter/ip6t_REJECT.c7
-rw-r--r--net/ipv6/netfilter/ip6t_SYNPROXY.c2
-rw-r--r--net/ipv6/netfilter/ip6table_filter.c5
-rw-r--r--net/ipv6/netfilter/ip6table_mangle.c10
-rw-r--r--net/ipv6/netfilter/ip6table_nat.c27
-rw-r--r--net/ipv6/netfilter/ip6table_raw.c5
-rw-r--r--net/ipv6/netfilter/ip6table_security.c5
-rw-r--r--net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c66
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c35
-rw-r--r--net/ipv6/netfilter/nf_defrag_ipv6_hooks.c11
-rw-r--r--net/ipv6/netfilter/nf_tables_ipv6.c127
-rw-r--r--net/ipv6/netfilter/nft_chain_nat_ipv6.c211
-rw-r--r--net/ipv6/netfilter/nft_chain_route_ipv6.c88
16 files changed, 512 insertions, 110 deletions
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index a7f842b29b67..7702f9e90a04 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -25,6 +25,19 @@ config NF_CONNTRACK_IPV6
To compile it as a module, choose M here. If unsure, say N.
+config NF_TABLES_IPV6
+ depends on NF_TABLES
+ tristate "IPv6 nf_tables support"
+
+config NFT_CHAIN_ROUTE_IPV6
+ depends on NF_TABLES_IPV6
+ tristate "IPv6 nf_tables route chain support"
+
+config NFT_CHAIN_NAT_IPV6
+ depends on NF_TABLES_IPV6
+ depends on NF_NAT_IPV6 && NFT_NAT
+ tristate "IPv6 nf_tables nat chain support"
+
config IP6_NF_IPTABLES
tristate "IP6 tables support (required for filtering)"
depends on INET && IPV6
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 2b53738f798c..d1b4928f34f7 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -23,6 +23,11 @@ obj-$(CONFIG_NF_NAT_IPV6) += nf_nat_ipv6.o
nf_defrag_ipv6-y := nf_defrag_ipv6_hooks.o nf_conntrack_reasm.o
obj-$(CONFIG_NF_DEFRAG_IPV6) += nf_defrag_ipv6.o
+# nf_tables
+obj-$(CONFIG_NF_TABLES_IPV6) += nf_tables_ipv6.o
+obj-$(CONFIG_NFT_CHAIN_ROUTE_IPV6) += nft_chain_route_ipv6.o
+obj-$(CONFIG_NFT_CHAIN_NAT_IPV6) += nft_chain_nat_ipv6.o
+
# matches
obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o
obj-$(CONFIG_IP6_NF_MATCH_EUI64) += ip6t_eui64.o
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 44400c216dc6..710238f58aa9 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -349,6 +349,11 @@ ip6t_do_table(struct sk_buff *skb,
local_bh_disable();
addend = xt_write_recseq_begin();
private = table->private;
+ /*
+ * Ensure we load private-> members after we've fetched the base
+ * pointer.
+ */
+ smp_read_barrier_depends();
cpu = smp_processor_id();
table_base = private->entries[cpu];
jumpstack = (struct ip6t_entry **)private->jumpstack[cpu];
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 56eef30ee5f6..da00a2ecde55 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -39,7 +39,7 @@ MODULE_DESCRIPTION("Xtables: packet \"rejection\" target for IPv6");
MODULE_LICENSE("GPL");
/* Send RST reply */
-static void send_reset(struct net *net, struct sk_buff *oldskb)
+static void send_reset(struct net *net, struct sk_buff *oldskb, int hook)
{
struct sk_buff *nskb;
struct tcphdr otcph, *tcph;
@@ -88,8 +88,7 @@ static void send_reset(struct net *net, struct sk_buff *oldskb)
}
/* Check checksum. */
- if (csum_ipv6_magic(&oip6h->saddr, &oip6h->daddr, otcplen, IPPROTO_TCP,
- skb_checksum(oldskb, tcphoff, otcplen, 0))) {
+ if (nf_ip6_checksum(oldskb, hook, tcphoff, IPPROTO_TCP)) {
pr_debug("TCP checksum is invalid\n");
return;
}
@@ -227,7 +226,7 @@ reject_tg6(struct sk_buff *skb, const struct xt_action_param *par)
/* Do nothing */
break;
case IP6T_TCP_RESET:
- send_reset(net, skb);
+ send_reset(net, skb, par->hooknum);
break;
default:
net_info_ratelimited("case %u not handled yet\n", reject->with);
diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c b/net/ipv6/netfilter/ip6t_SYNPROXY.c
index 2748b042da72..bf9f612c1bc2 100644
--- a/net/ipv6/netfilter/ip6t_SYNPROXY.c
+++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c
@@ -312,7 +312,7 @@ synproxy_tg6(struct sk_buff *skb, const struct xt_action_param *par)
return XT_CONTINUE;
}
-static unsigned int ipv6_synproxy_hook(unsigned int hooknum,
+static unsigned int ipv6_synproxy_hook(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
diff --git a/net/ipv6/netfilter/ip6table_filter.c b/net/ipv6/netfilter/ip6table_filter.c
index 29b44b14c5ea..ca7f6c128086 100644
--- a/net/ipv6/netfilter/ip6table_filter.c
+++ b/net/ipv6/netfilter/ip6table_filter.c
@@ -32,13 +32,14 @@ static const struct xt_table packet_filter = {
/* The work comes in here from netfilter.c. */
static unsigned int
-ip6table_filter_hook(unsigned int hook, struct sk_buff *skb,
+ip6table_filter_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
const struct net *net = dev_net((in != NULL) ? in : out);
- return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_filter);
+ return ip6t_do_table(skb, ops->hooknum, in, out,
+ net->ipv6.ip6table_filter);
}
static struct nf_hook_ops *filter_ops __read_mostly;
diff --git a/net/ipv6/netfilter/ip6table_mangle.c b/net/ipv6/netfilter/ip6table_mangle.c
index c705907ae6ab..307bbb782d14 100644
--- a/net/ipv6/netfilter/ip6table_mangle.c
+++ b/net/ipv6/netfilter/ip6table_mangle.c
@@ -76,17 +76,17 @@ ip6t_mangle_out(struct sk_buff *skb, const struct net_device *out)
/* The work comes in here from netfilter.c. */
static unsigned int
-ip6table_mangle_hook(unsigned int hook, struct sk_buff *skb,
+ip6table_mangle_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- if (hook == NF_INET_LOCAL_OUT)
+ if (ops->hooknum == NF_INET_LOCAL_OUT)
return ip6t_mangle_out(skb, out);
- if (hook == NF_INET_POST_ROUTING)
- return ip6t_do_table(skb, hook, in, out,
+ if (ops->hooknum == NF_INET_POST_ROUTING)
+ return ip6t_do_table(skb, ops->hooknum, in, out,
dev_net(out)->ipv6.ip6table_mangle);
/* INPUT/FORWARD */
- return ip6t_do_table(skb, hook, in, out,
+ return ip6t_do_table(skb, ops->hooknum, in, out,
dev_net(in)->ipv6.ip6table_mangle);
}
diff --git a/net/ipv6/netfilter/ip6table_nat.c b/net/ipv6/netfilter/ip6table_nat.c
index 9b076d2d3a7b..84c7f33d0cf8 100644
--- a/net/ipv6/netfilter/ip6table_nat.c
+++ b/net/ipv6/netfilter/ip6table_nat.c
@@ -63,7 +63,7 @@ static unsigned int nf_nat_rule_find(struct sk_buff *skb, unsigned int hooknum,
}
static unsigned int
-nf_nat_ipv6_fn(unsigned int hooknum,
+nf_nat_ipv6_fn(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -72,7 +72,7 @@ nf_nat_ipv6_fn(unsigned int hooknum,
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
struct nf_conn_nat *nat;
- enum nf_nat_manip_type maniptype = HOOK2MANIP(hooknum);
+ enum nf_nat_manip_type maniptype = HOOK2MANIP(ops->hooknum);
__be16 frag_off;
int hdrlen;
u8 nexthdr;
@@ -111,7 +111,8 @@ nf_nat_ipv6_fn(unsigned int hooknum,
if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) {
if (!nf_nat_icmpv6_reply_translation(skb, ct, ctinfo,
- hooknum, hdrlen))
+ ops->hooknum,
+ hdrlen))
return NF_DROP;
else
return NF_ACCEPT;
@@ -124,14 +125,14 @@ nf_nat_ipv6_fn(unsigned int hooknum,
if (!nf_nat_initialized(ct, maniptype)) {
unsigned int ret;
- ret = nf_nat_rule_find(skb, hooknum, in, out, ct);
+ ret = nf_nat_rule_find(skb, ops->hooknum, in, out, ct);
if (ret != NF_ACCEPT)
return ret;
} else {
pr_debug("Already setup manip %s for ct %p\n",
maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
ct);
- if (nf_nat_oif_changed(hooknum, ctinfo, nat, out))
+ if (nf_nat_oif_changed(ops->hooknum, ctinfo, nat, out))
goto oif_changed;
}
break;
@@ -140,11 +141,11 @@ nf_nat_ipv6_fn(unsigned int hooknum,
/* ESTABLISHED */
NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
ctinfo == IP_CT_ESTABLISHED_REPLY);
- if (nf_nat_oif_changed(hooknum, ctinfo, nat, out))
+ if (nf_nat_oif_changed(ops->hooknum, ctinfo, nat, out))
goto oif_changed;
}
- return nf_nat_packet(ct, ctinfo, hooknum, skb);
+ return nf_nat_packet(ct, ctinfo, ops->hooknum, skb);
oif_changed:
nf_ct_kill_acct(ct, ctinfo, skb);
@@ -152,7 +153,7 @@ oif_changed:
}
static unsigned int
-nf_nat_ipv6_in(unsigned int hooknum,
+nf_nat_ipv6_in(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -161,7 +162,7 @@ nf_nat_ipv6_in(unsigned int hooknum,
unsigned int ret;
struct in6_addr daddr = ipv6_hdr(skb)->daddr;
- ret = nf_nat_ipv6_fn(hooknum, skb, in, out, okfn);
+ ret = nf_nat_ipv6_fn(ops, skb, in, out, okfn);
if (ret != NF_DROP && ret != NF_STOLEN &&
ipv6_addr_cmp(&daddr, &ipv6_hdr(skb)->daddr))
skb_dst_drop(skb);
@@ -170,7 +171,7 @@ nf_nat_ipv6_in(unsigned int hooknum,
}
static unsigned int
-nf_nat_ipv6_out(unsigned int hooknum,
+nf_nat_ipv6_out(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -187,7 +188,7 @@ nf_nat_ipv6_out(unsigned int hooknum,
if (skb->len < sizeof(struct ipv6hdr))
return NF_ACCEPT;
- ret = nf_nat_ipv6_fn(hooknum, skb, in, out, okfn);
+ ret = nf_nat_ipv6_fn(ops, skb, in, out, okfn);
#ifdef CONFIG_XFRM
if (ret != NF_DROP && ret != NF_STOLEN &&
!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
@@ -209,7 +210,7 @@ nf_nat_ipv6_out(unsigned int hooknum,
}
static unsigned int
-nf_nat_ipv6_local_fn(unsigned int hooknum,
+nf_nat_ipv6_local_fn(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -224,7 +225,7 @@ nf_nat_ipv6_local_fn(unsigned int hooknum,
if (skb->len < sizeof(struct ipv6hdr))
return NF_ACCEPT;
- ret = nf_nat_ipv6_fn(hooknum, skb, in, out, okfn);
+ ret = nf_nat_ipv6_fn(ops, skb, in, out, okfn);
if (ret != NF_DROP && ret != NF_STOLEN &&
(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
diff --git a/net/ipv6/netfilter/ip6table_raw.c b/net/ipv6/netfilter/ip6table_raw.c
index 9a626d86720f..5274740acecc 100644
--- a/net/ipv6/netfilter/ip6table_raw.c
+++ b/net/ipv6/netfilter/ip6table_raw.c
@@ -19,13 +19,14 @@ static const struct xt_table packet_raw = {
/* The work comes in here from netfilter.c. */
static unsigned int
-ip6table_raw_hook(unsigned int hook, struct sk_buff *skb,
+ip6table_raw_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
const struct net *net = dev_net((in != NULL) ? in : out);
- return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_raw);
+ return ip6t_do_table(skb, ops->hooknum, in, out,
+ net->ipv6.ip6table_raw);
}
static struct nf_hook_ops *rawtable_ops __read_mostly;
diff --git a/net/ipv6/netfilter/ip6table_security.c b/net/ipv6/netfilter/ip6table_security.c
index ce88d1d7e525..ab3b0219ecfa 100644
--- a/net/ipv6/netfilter/ip6table_security.c
+++ b/net/ipv6/netfilter/ip6table_security.c
@@ -36,14 +36,15 @@ static const struct xt_table security_table = {
};
static unsigned int
-ip6table_security_hook(unsigned int hook, struct sk_buff *skb,
+ip6table_security_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
const struct net *net = dev_net((in != NULL) ? in : out);
- return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_security);
+ return ip6t_do_table(skb, ops->hooknum, in, out,
+ net->ipv6.ip6table_security);
}
static struct nf_hook_ops *sectbl_ops __read_mostly;
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index d6e4dd8b58df..4cbc6b290dd5 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -95,7 +95,7 @@ static int ipv6_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
return NF_ACCEPT;
}
-static unsigned int ipv6_helper(unsigned int hooknum,
+static unsigned int ipv6_helper(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -133,7 +133,7 @@ static unsigned int ipv6_helper(unsigned int hooknum,
return helper->help(skb, protoff, ct, ctinfo);
}
-static unsigned int ipv6_confirm(unsigned int hooknum,
+static unsigned int ipv6_confirm(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -169,66 +169,16 @@ out:
return nf_conntrack_confirm(skb);
}
-static unsigned int __ipv6_conntrack_in(struct net *net,
- unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- struct sk_buff *reasm = skb->nfct_reasm;
- const struct nf_conn_help *help;
- struct nf_conn *ct;
- enum ip_conntrack_info ctinfo;
-
- /* This packet is fragmented and has reassembled packet. */
- if (reasm) {
- /* Reassembled packet isn't parsed yet ? */
- if (!reasm->nfct) {
- unsigned int ret;
-
- ret = nf_conntrack_in(net, PF_INET6, hooknum, reasm);
- if (ret != NF_ACCEPT)
- return ret;
- }
-
- /* Conntrack helpers need the entire reassembled packet in the
- * POST_ROUTING hook. In case of unconfirmed connections NAT
- * might reassign a helper, so the entire packet is also
- * required.
- */
- ct = nf_ct_get(reasm, &ctinfo);
- if (ct != NULL && !nf_ct_is_untracked(ct)) {
- help = nfct_help(ct);
- if ((help && help->helper) || !nf_ct_is_confirmed(ct)) {
- nf_conntrack_get_reasm(reasm);
- NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, reasm,
- (struct net_device *)in,
- (struct net_device *)out,
- okfn, NF_IP6_PRI_CONNTRACK + 1);
- return NF_DROP_ERR(-ECANCELED);
- }
- }
-
- nf_conntrack_get(reasm->nfct);
- skb->nfct = reasm->nfct;
- skb->nfctinfo = reasm->nfctinfo;
- return NF_ACCEPT;
- }
-
- return nf_conntrack_in(net, PF_INET6, hooknum, skb);
-}
-
-static unsigned int ipv6_conntrack_in(unsigned int hooknum,
+static unsigned int ipv6_conntrack_in(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return __ipv6_conntrack_in(dev_net(in), hooknum, skb, in, out, okfn);
+ return nf_conntrack_in(dev_net(in), PF_INET6, ops->hooknum, skb);
}
-static unsigned int ipv6_conntrack_local(unsigned int hooknum,
+static unsigned int ipv6_conntrack_local(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -239,7 +189,7 @@ static unsigned int ipv6_conntrack_local(unsigned int hooknum,
net_notice_ratelimited("ipv6_conntrack_local: packet too short\n");
return NF_ACCEPT;
}
- return __ipv6_conntrack_in(dev_net(out), hooknum, skb, in, out, okfn);
+ return nf_conntrack_in(dev_net(out), PF_INET6, ops->hooknum, skb);
}
static struct nf_hook_ops ipv6_conntrack_ops[] __read_mostly = {
@@ -297,9 +247,9 @@ ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len)
struct nf_conntrack_tuple tuple = { .src.l3num = NFPROTO_IPV6 };
struct nf_conn *ct;
- tuple.src.u3.in6 = inet6->rcv_saddr;
+ tuple.src.u3.in6 = sk->sk_v6_rcv_saddr;
tuple.src.u.tcp.port = inet->inet_sport;
- tuple.dst.u3.in6 = inet6->daddr;
+ tuple.dst.u3.in6 = sk->sk_v6_daddr;
tuple.dst.u.tcp.port = inet->inet_dport;
tuple.dst.protonum = sk->sk_protocol;
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index dffdc1a389c5..767ab8da8218 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -144,12 +144,24 @@ static inline u8 ip6_frag_ecn(const struct ipv6hdr *ipv6h)
return 1 << (ipv6_get_dsfield(ipv6h) & INET_ECN_MASK);
}
+static unsigned int nf_hash_frag(__be32 id, const struct in6_addr *saddr,
+ const struct in6_addr *daddr)
+{
+ u32 c;
+
+ net_get_random_once(&nf_frags.rnd, sizeof(nf_frags.rnd));
+ c = jhash_3words(ipv6_addr_hash(saddr), ipv6_addr_hash(daddr),
+ (__force u32)id, nf_frags.rnd);
+ return c & (INETFRAGS_HASHSZ - 1);
+}
+
+
static unsigned int nf_hashfn(struct inet_frag_queue *q)
{
const struct frag_queue *nq;
nq = container_of(q, struct frag_queue, q);
- return inet6_hash_frag(nq->id, &nq->saddr, &nq->daddr, nf_frags.rnd);
+ return nf_hash_frag(nq->id, &nq->saddr, &nq->daddr);
}
static void nf_skb_free(struct sk_buff *skb)
@@ -185,7 +197,7 @@ static inline struct frag_queue *fq_find(struct net *net, __be32 id,
arg.ecn = ecn;
read_lock_bh(&nf_frags.lock);
- hash = inet6_hash_frag(id, src, dst, nf_frags.rnd);
+ hash = nf_hash_frag(id, src, dst);
q = inet_frag_find(&net->nf_frag.frags, &nf_frags, &arg, hash);
local_bh_enable();
@@ -621,31 +633,16 @@ ret_orig:
return skb;
}
-void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
- struct net_device *in, struct net_device *out,
- int (*okfn)(struct sk_buff *))
+void nf_ct_frag6_consume_orig(struct sk_buff *skb)
{
struct sk_buff *s, *s2;
- unsigned int ret = 0;
for (s = NFCT_FRAG6_CB(skb)->orig; s;) {
- nf_conntrack_put_reasm(s->nfct_reasm);
- nf_conntrack_get_reasm(skb);
- s->nfct_reasm = skb;
-
s2 = s->next;
s->next = NULL;
-
- if (ret != -ECANCELED)
- ret = NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, s,
- in, out, okfn,
- NF_IP6_PRI_CONNTRACK_DEFRAG + 1);
- else
- kfree_skb(s);
-
+ consume_skb(s);
s = s2;
}
- nf_conntrack_put_reasm(skb);
}
static int nf_ct_net_init(struct net *net)
diff --git a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
index aacd121fe8c5..7b9a748c6bac 100644
--- a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
+++ b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
@@ -52,7 +52,7 @@ static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
}
-static unsigned int ipv6_defrag(unsigned int hooknum,
+static unsigned int ipv6_defrag(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -66,7 +66,7 @@ static unsigned int ipv6_defrag(unsigned int hooknum,
return NF_ACCEPT;
#endif
- reasm = nf_ct_frag6_gather(skb, nf_ct6_defrag_user(hooknum, skb));
+ reasm = nf_ct_frag6_gather(skb, nf_ct6_defrag_user(ops->hooknum, skb));
/* queued */
if (reasm == NULL)
return NF_STOLEN;
@@ -75,8 +75,11 @@ static unsigned int ipv6_defrag(unsigned int hooknum,
if (reasm == skb)
return NF_ACCEPT;
- nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in,
- (struct net_device *)out, okfn);
+ nf_ct_frag6_consume_orig(reasm);
+
+ NF_HOOK_THRESH(NFPROTO_IPV6, ops->hooknum, reasm,
+ (struct net_device *) in, (struct net_device *) out,
+ okfn, NF_IP6_PRI_CONNTRACK_DEFRAG + 1);
return NF_STOLEN;
}
diff --git a/net/ipv6/netfilter/nf_tables_ipv6.c b/net/ipv6/netfilter/nf_tables_ipv6.c
new file mode 100644
index 000000000000..d77db8a13505
--- /dev/null
+++ b/net/ipv6/netfilter/nf_tables_ipv6.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2012-2013 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter_ipv6.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables_ipv6.h>
+
+static unsigned int nft_ipv6_output(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct nft_pktinfo pkt;
+
+ if (unlikely(skb->len < sizeof(struct ipv6hdr))) {
+ if (net_ratelimit())
+ pr_info("nf_tables_ipv6: ignoring short SOCK_RAW "
+ "packet\n");
+ return NF_ACCEPT;
+ }
+ if (nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out) < 0)
+ return NF_DROP;
+
+ return nft_do_chain_pktinfo(&pkt, ops);
+}
+
+static struct nft_af_info nft_af_ipv6 __read_mostly = {
+ .family = NFPROTO_IPV6,
+ .nhooks = NF_INET_NUMHOOKS,
+ .owner = THIS_MODULE,
+ .hooks = {
+ [NF_INET_LOCAL_OUT] = nft_ipv6_output,
+ },
+};
+
+static int nf_tables_ipv6_init_net(struct net *net)
+{
+ net->nft.ipv6 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
+ if (net->nft.ipv6 == NULL)
+ return -ENOMEM;
+
+ memcpy(net->nft.ipv6, &nft_af_ipv6, sizeof(nft_af_ipv6));
+
+ if (nft_register_afinfo(net, net->nft.ipv6) < 0)
+ goto err;
+
+ return 0;
+err:
+ kfree(net->nft.ipv6);
+ return -ENOMEM;
+}
+
+static void nf_tables_ipv6_exit_net(struct net *net)
+{
+ nft_unregister_afinfo(net->nft.ipv6);
+ kfree(net->nft.ipv6);
+}
+
+static struct pernet_operations nf_tables_ipv6_net_ops = {
+ .init = nf_tables_ipv6_init_net,
+ .exit = nf_tables_ipv6_exit_net,
+};
+
+static unsigned int
+nft_do_chain_ipv6(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct nft_pktinfo pkt;
+
+ /* malformed packet, drop it */
+ if (nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out) < 0)
+ return NF_DROP;
+
+ return nft_do_chain_pktinfo(&pkt, ops);
+}
+
+static struct nf_chain_type filter_ipv6 = {
+ .family = NFPROTO_IPV6,
+ .name = "filter",
+ .type = NFT_CHAIN_T_DEFAULT,
+ .hook_mask = (1 << NF_INET_LOCAL_IN) |
+ (1 << NF_INET_LOCAL_OUT) |
+ (1 << NF_INET_FORWARD) |
+ (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_POST_ROUTING),
+ .fn = {
+ [NF_INET_LOCAL_IN] = nft_do_chain_ipv6,
+ [NF_INET_LOCAL_OUT] = nft_ipv6_output,
+ [NF_INET_FORWARD] = nft_do_chain_ipv6,
+ [NF_INET_PRE_ROUTING] = nft_do_chain_ipv6,
+ [NF_INET_POST_ROUTING] = nft_do_chain_ipv6,
+ },
+};
+
+static int __init nf_tables_ipv6_init(void)
+{
+ nft_register_chain_type(&filter_ipv6);
+ return register_pernet_subsys(&nf_tables_ipv6_net_ops);
+}
+
+static void __exit nf_tables_ipv6_exit(void)
+{
+ unregister_pernet_subsys(&nf_tables_ipv6_net_ops);
+ nft_unregister_chain_type(&filter_ipv6);
+}
+
+module_init(nf_tables_ipv6_init);
+module_exit(nf_tables_ipv6_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_FAMILY(AF_INET6);
diff --git a/net/ipv6/netfilter/nft_chain_nat_ipv6.c b/net/ipv6/netfilter/nft_chain_nat_ipv6.c
new file mode 100644
index 000000000000..e86dcd70dc76
--- /dev/null
+++ b/net/ipv6/netfilter/nft_chain_nat_ipv6.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2012 Intel Corporation
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_nat.h>
+#include <net/netfilter/nf_nat_core.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables_ipv6.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/ipv6.h>
+
+/*
+ * IPv6 NAT chains
+ */
+
+static unsigned int nf_nat_ipv6_fn(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
+ struct nf_conn_nat *nat;
+ enum nf_nat_manip_type maniptype = HOOK2MANIP(ops->hooknum);
+ __be16 frag_off;
+ int hdrlen;
+ u8 nexthdr;
+ struct nft_pktinfo pkt;
+ unsigned int ret;
+
+ if (ct == NULL || nf_ct_is_untracked(ct))
+ return NF_ACCEPT;
+
+ nat = nfct_nat(ct);
+ if (nat == NULL) {
+ /* Conntrack module was loaded late, can't add extension. */
+ if (nf_ct_is_confirmed(ct))
+ return NF_ACCEPT;
+ nat = nf_ct_ext_add(ct, NF_CT_EXT_NAT, GFP_ATOMIC);
+ if (nat == NULL)
+ return NF_ACCEPT;
+ }
+
+ switch (ctinfo) {
+ case IP_CT_RELATED:
+ case IP_CT_RELATED + IP_CT_IS_REPLY:
+ nexthdr = ipv6_hdr(skb)->nexthdr;
+ hdrlen = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr),
+ &nexthdr, &frag_off);
+
+ if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) {
+ if (!nf_nat_icmpv6_reply_translation(skb, ct, ctinfo,
+ ops->hooknum,
+ hdrlen))
+ return NF_DROP;
+ else
+ return NF_ACCEPT;
+ }
+ /* Fall through */
+ case IP_CT_NEW:
+ if (nf_nat_initialized(ct, maniptype))
+ break;
+
+ nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out);
+
+ ret = nft_do_chain_pktinfo(&pkt, ops);
+ if (ret != NF_ACCEPT)
+ return ret;
+ if (!nf_nat_initialized(ct, maniptype)) {
+ ret = nf_nat_alloc_null_binding(ct, ops->hooknum);
+ if (ret != NF_ACCEPT)
+ return ret;
+ }
+ default:
+ break;
+ }
+
+ return nf_nat_packet(ct, ctinfo, ops->hooknum, skb);
+}
+
+static unsigned int nf_nat_ipv6_prerouting(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct in6_addr daddr = ipv6_hdr(skb)->daddr;
+ unsigned int ret;
+
+ ret = nf_nat_ipv6_fn(ops, skb, in, out, okfn);
+ if (ret != NF_DROP && ret != NF_STOLEN &&
+ ipv6_addr_cmp(&daddr, &ipv6_hdr(skb)->daddr))
+ skb_dst_drop(skb);
+
+ return ret;
+}
+
+static unsigned int nf_nat_ipv6_postrouting(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ enum ip_conntrack_info ctinfo __maybe_unused;
+ const struct nf_conn *ct __maybe_unused;
+ unsigned int ret;
+
+ ret = nf_nat_ipv6_fn(ops, skb, in, out, okfn);
+#ifdef CONFIG_XFRM
+ if (ret != NF_DROP && ret != NF_STOLEN &&
+ !(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
+ (ct = nf_ct_get(skb, &ctinfo)) != NULL) {
+ enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+
+ if (!nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.src.u3,
+ &ct->tuplehash[!dir].tuple.dst.u3) ||
+ (ct->tuplehash[dir].tuple.src.u.all !=
+ ct->tuplehash[!dir].tuple.dst.u.all))
+ if (nf_xfrm_me_harder(skb, AF_INET6) < 0)
+ ret = NF_DROP;
+ }
+#endif
+ return ret;
+}
+
+static unsigned int nf_nat_ipv6_output(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ enum ip_conntrack_info ctinfo;
+ const struct nf_conn *ct;
+ unsigned int ret;
+
+ ret = nf_nat_ipv6_fn(ops, skb, in, out, okfn);
+ if (ret != NF_DROP && ret != NF_STOLEN &&
+ (ct = nf_ct_get(skb, &ctinfo)) != NULL) {
+ enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+
+ if (!nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.dst.u3,
+ &ct->tuplehash[!dir].tuple.src.u3)) {
+ if (ip6_route_me_harder(skb))
+ ret = NF_DROP;
+ }
+#ifdef CONFIG_XFRM
+ else if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
+ ct->tuplehash[dir].tuple.dst.u.all !=
+ ct->tuplehash[!dir].tuple.src.u.all)
+ if (nf_xfrm_me_harder(skb, AF_INET6))
+ ret = NF_DROP;
+#endif
+ }
+ return ret;
+}
+
+static struct nf_chain_type nft_chain_nat_ipv6 = {
+ .family = NFPROTO_IPV6,
+ .name = "nat",
+ .type = NFT_CHAIN_T_NAT,
+ .hook_mask = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT) |
+ (1 << NF_INET_LOCAL_IN),
+ .fn = {
+ [NF_INET_PRE_ROUTING] = nf_nat_ipv6_prerouting,
+ [NF_INET_POST_ROUTING] = nf_nat_ipv6_postrouting,
+ [NF_INET_LOCAL_OUT] = nf_nat_ipv6_output,
+ [NF_INET_LOCAL_IN] = nf_nat_ipv6_fn,
+ },
+ .me = THIS_MODULE,
+};
+
+static int __init nft_chain_nat_ipv6_init(void)
+{
+ int err;
+
+ err = nft_register_chain_type(&nft_chain_nat_ipv6);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static void __exit nft_chain_nat_ipv6_exit(void)
+{
+ nft_unregister_chain_type(&nft_chain_nat_ipv6);
+}
+
+module_init(nft_chain_nat_ipv6_init);
+module_exit(nft_chain_nat_ipv6_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>");
+MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");
diff --git a/net/ipv6/netfilter/nft_chain_route_ipv6.c b/net/ipv6/netfilter/nft_chain_route_ipv6.c
new file mode 100644
index 000000000000..3fe40f0456ad
--- /dev/null
+++ b/net/ipv6/netfilter/nft_chain_route_ipv6.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables_ipv6.h>
+#include <net/route.h>
+
+static unsigned int nf_route_table_hook(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ unsigned int ret;
+ struct nft_pktinfo pkt;
+ struct in6_addr saddr, daddr;
+ u_int8_t hop_limit;
+ u32 mark, flowlabel;
+
+ /* malformed packet, drop it */
+ if (nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out) < 0)
+ return NF_DROP;
+
+ /* save source/dest address, mark, hoplimit, flowlabel, priority */
+ memcpy(&saddr, &ipv6_hdr(skb)->saddr, sizeof(saddr));
+ memcpy(&daddr, &ipv6_hdr(skb)->daddr, sizeof(daddr));
+ mark = skb->mark;
+ hop_limit = ipv6_hdr(skb)->hop_limit;
+
+ /* flowlabel and prio (includes version, which shouldn't change either */
+ flowlabel = *((u32 *)ipv6_hdr(skb));
+
+ ret = nft_do_chain_pktinfo(&pkt, ops);
+ if (ret != NF_DROP && ret != NF_QUEUE &&
+ (memcmp(&ipv6_hdr(skb)->saddr, &saddr, sizeof(saddr)) ||
+ memcmp(&ipv6_hdr(skb)->daddr, &daddr, sizeof(daddr)) ||
+ skb->mark != mark ||
+ ipv6_hdr(skb)->hop_limit != hop_limit ||
+ flowlabel != *((u_int32_t *)ipv6_hdr(skb))))
+ return ip6_route_me_harder(skb) == 0 ? ret : NF_DROP;
+
+ return ret;
+}
+
+static struct nf_chain_type nft_chain_route_ipv6 = {
+ .family = NFPROTO_IPV6,
+ .name = "route",
+ .type = NFT_CHAIN_T_ROUTE,
+ .hook_mask = (1 << NF_INET_LOCAL_OUT),
+ .fn = {
+ [NF_INET_LOCAL_OUT] = nf_route_table_hook,
+ },
+ .me = THIS_MODULE,
+};
+
+static int __init nft_chain_route_init(void)
+{
+ return nft_register_chain_type(&nft_chain_route_ipv6);
+}
+
+static void __exit nft_chain_route_exit(void)
+{
+ nft_unregister_chain_type(&nft_chain_route_ipv6);
+}
+
+module_init(nft_chain_route_init);
+module_exit(nft_chain_route_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_CHAIN(AF_INET6, "route");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.