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-rw-r--r--include/net/netfilter/nf_conntrack_ecache.h108
-rw-r--r--include/uapi/linux/netfilter/nfnetlink_queue.h10
-rw-r--r--net/bridge/netfilter/nf_tables_bridge.c47
-rw-r--r--net/ipv6/netfilter/ip6t_SYNPROXY.c56
-rw-r--r--net/ipv6/netfilter/nf_reject_ipv6.c2
-rw-r--r--net/netfilter/nf_conntrack_core.c15
-rw-r--r--net/netfilter/nf_conntrack_ecache.c84
-rw-r--r--net/netfilter/nfnetlink_queue.c105
8 files changed, 298 insertions, 129 deletions
diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index 57c880378443..fa36447371c6 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -73,6 +73,8 @@ void nf_conntrack_unregister_notifier(struct net *net,
struct nf_ct_event_notifier *nb);
void nf_ct_deliver_cached_events(struct nf_conn *ct);
+int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
+ u32 portid, int report);
static inline void
nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
@@ -91,69 +93,25 @@ nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
}
static inline int
-nf_conntrack_eventmask_report(unsigned int eventmask,
- struct nf_conn *ct,
- u32 portid,
- int report)
-{
- int ret = 0;
- struct net *net = nf_ct_net(ct);
- struct nf_ct_event_notifier *notify;
- struct nf_conntrack_ecache *e;
-
- rcu_read_lock();
- notify = rcu_dereference(net->ct.nf_conntrack_event_cb);
- if (notify == NULL)
- goto out_unlock;
-
- e = nf_ct_ecache_find(ct);
- if (e == NULL)
- goto out_unlock;
-
- if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) {
- struct nf_ct_event item = {
- .ct = ct,
- .portid = e->portid ? e->portid : portid,
- .report = report
- };
- /* This is a resent of a destroy event? If so, skip missed */
- unsigned long missed = e->portid ? 0 : e->missed;
-
- if (!((eventmask | missed) & e->ctmask))
- goto out_unlock;
-
- ret = notify->fcn(eventmask | missed, &item);
- if (unlikely(ret < 0 || missed)) {
- spin_lock_bh(&ct->lock);
- if (ret < 0) {
- /* This is a destroy event that has been
- * triggered by a process, we store the PORTID
- * to include it in the retransmission. */
- if (eventmask & (1 << IPCT_DESTROY) &&
- e->portid == 0 && portid != 0)
- e->portid = portid;
- else
- e->missed |= eventmask;
- } else
- e->missed &= ~missed;
- spin_unlock_bh(&ct->lock);
- }
- }
-out_unlock:
- rcu_read_unlock();
- return ret;
-}
-
-static inline int
nf_conntrack_event_report(enum ip_conntrack_events event, struct nf_conn *ct,
u32 portid, int report)
{
+ const struct net *net = nf_ct_net(ct);
+
+ if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
+ return 0;
+
return nf_conntrack_eventmask_report(1 << event, ct, portid, report);
}
static inline int
nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
{
+ const struct net *net = nf_ct_net(ct);
+
+ if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
+ return 0;
+
return nf_conntrack_eventmask_report(1 << event, ct, 0, 0);
}
@@ -172,43 +130,9 @@ int nf_ct_expect_register_notifier(struct net *net,
void nf_ct_expect_unregister_notifier(struct net *net,
struct nf_exp_event_notifier *nb);
-static inline void
-nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
- struct nf_conntrack_expect *exp,
- u32 portid,
- int report)
-{
- struct net *net = nf_ct_exp_net(exp);
- struct nf_exp_event_notifier *notify;
- struct nf_conntrack_ecache *e;
-
- rcu_read_lock();
- notify = rcu_dereference(net->ct.nf_expect_event_cb);
- if (notify == NULL)
- goto out_unlock;
-
- e = nf_ct_ecache_find(exp->master);
- if (e == NULL)
- goto out_unlock;
-
- if (e->expmask & (1 << event)) {
- struct nf_exp_event item = {
- .exp = exp,
- .portid = portid,
- .report = report
- };
- notify->fcn(1 << event, &item);
- }
-out_unlock:
- rcu_read_unlock();
-}
-
-static inline void
-nf_ct_expect_event(enum ip_conntrack_expect_events event,
- struct nf_conntrack_expect *exp)
-{
- nf_ct_expect_event_report(event, exp, 0, 0);
-}
+void nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
+ struct nf_conntrack_expect *exp,
+ u32 portid, int report);
int nf_conntrack_ecache_pernet_init(struct net *net);
void nf_conntrack_ecache_pernet_fini(struct net *net);
@@ -245,8 +169,6 @@ static inline int nf_conntrack_event_report(enum ip_conntrack_events event,
u32 portid,
int report) { return 0; }
static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}
-static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event,
- struct nf_conntrack_expect *exp) {}
static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
struct nf_conntrack_expect *exp,
u32 portid,
diff --git a/include/uapi/linux/netfilter/nfnetlink_queue.h b/include/uapi/linux/netfilter/nfnetlink_queue.h
index b67a853638ff..ae30841ff94e 100644
--- a/include/uapi/linux/netfilter/nfnetlink_queue.h
+++ b/include/uapi/linux/netfilter/nfnetlink_queue.h
@@ -30,6 +30,14 @@ struct nfqnl_msg_packet_timestamp {
__aligned_be64 usec;
};
+enum nfqnl_vlan_attr {
+ NFQA_VLAN_UNSPEC,
+ NFQA_VLAN_PROTO, /* __be16 skb vlan_proto */
+ NFQA_VLAN_TCI, /* __be16 skb htons(vlan_tci) */
+ __NFQA_VLAN_MAX,
+};
+#define NFQA_VLAN_MAX (__NFQA_VLAN_MAX + 1)
+
enum nfqnl_attr_type {
NFQA_UNSPEC,
NFQA_PACKET_HDR,
@@ -50,6 +58,8 @@ enum nfqnl_attr_type {
NFQA_UID, /* __u32 sk uid */
NFQA_GID, /* __u32 sk gid */
NFQA_SECCTX, /* security context string */
+ NFQA_VLAN, /* nested attribute: packet vlan info */
+ NFQA_L2HDR, /* full L2 header */
__NFQA_MAX
};
diff --git a/net/bridge/netfilter/nf_tables_bridge.c b/net/bridge/netfilter/nf_tables_bridge.c
index 7fcdd7261d88..a78c4e2826e5 100644
--- a/net/bridge/netfilter/nf_tables_bridge.c
+++ b/net/bridge/netfilter/nf_tables_bridge.c
@@ -162,15 +162,57 @@ static const struct nf_chain_type filter_bridge = {
(1 << NF_BR_POST_ROUTING),
};
+static void nf_br_saveroute(const struct sk_buff *skb,
+ struct nf_queue_entry *entry)
+{
+}
+
+static int nf_br_reroute(struct net *net, struct sk_buff *skb,
+ const struct nf_queue_entry *entry)
+{
+ return 0;
+}
+
+static __sum16 nf_br_checksum(struct sk_buff *skb, unsigned int hook,
+ unsigned int dataoff, u_int8_t protocol)
+{
+ return 0;
+}
+
+static __sum16 nf_br_checksum_partial(struct sk_buff *skb, unsigned int hook,
+ unsigned int dataoff, unsigned int len,
+ u_int8_t protocol)
+{
+ return 0;
+}
+
+static int nf_br_route(struct net *net, struct dst_entry **dst,
+ struct flowi *fl, bool strict __always_unused)
+{
+ return 0;
+}
+
+static const struct nf_afinfo nf_br_afinfo = {
+ .family = AF_BRIDGE,
+ .checksum = nf_br_checksum,
+ .checksum_partial = nf_br_checksum_partial,
+ .route = nf_br_route,
+ .saveroute = nf_br_saveroute,
+ .reroute = nf_br_reroute,
+ .route_key_size = 0,
+};
+
static int __init nf_tables_bridge_init(void)
{
int ret;
+ nf_register_afinfo(&nf_br_afinfo);
nft_register_chain_type(&filter_bridge);
ret = register_pernet_subsys(&nf_tables_bridge_net_ops);
- if (ret < 0)
+ if (ret < 0) {
nft_unregister_chain_type(&filter_bridge);
-
+ nf_unregister_afinfo(&nf_br_afinfo);
+ }
return ret;
}
@@ -178,6 +220,7 @@ static void __exit nf_tables_bridge_exit(void)
{
unregister_pernet_subsys(&nf_tables_bridge_net_ops);
nft_unregister_chain_type(&filter_bridge);
+ nf_unregister_afinfo(&nf_br_afinfo);
}
module_init(nf_tables_bridge_init);
diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c b/net/ipv6/netfilter/ip6t_SYNPROXY.c
index 3deed5860a42..5d778dd11f66 100644
--- a/net/ipv6/netfilter/ip6t_SYNPROXY.c
+++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c
@@ -20,15 +20,16 @@
#include <net/netfilter/nf_conntrack_synproxy.h>
static struct ipv6hdr *
-synproxy_build_ip(struct sk_buff *skb, const struct in6_addr *saddr,
- const struct in6_addr *daddr)
+synproxy_build_ip(struct net *net, struct sk_buff *skb,
+ const struct in6_addr *saddr,
+ const struct in6_addr *daddr)
{
struct ipv6hdr *iph;
skb_reset_network_header(skb);
iph = (struct ipv6hdr *)skb_put(skb, sizeof(*iph));
ip6_flow_hdr(iph, 0, 0);
- iph->hop_limit = 64; //XXX
+ iph->hop_limit = net->ipv6.devconf_all->hop_limit;
iph->nexthdr = IPPROTO_TCP;
iph->saddr = *saddr;
iph->daddr = *daddr;
@@ -37,13 +38,12 @@ synproxy_build_ip(struct sk_buff *skb, const struct in6_addr *saddr,
}
static void
-synproxy_send_tcp(const struct synproxy_net *snet,
+synproxy_send_tcp(struct net *net,
const struct sk_buff *skb, struct sk_buff *nskb,
struct nf_conntrack *nfct, enum ip_conntrack_info ctinfo,
struct ipv6hdr *niph, struct tcphdr *nth,
unsigned int tcp_hdr_size)
{
- struct net *net = nf_ct_net(snet->tmpl);
struct dst_entry *dst;
struct flowi6 fl6;
@@ -84,7 +84,7 @@ free_nskb:
}
static void
-synproxy_send_client_synack(const struct synproxy_net *snet,
+synproxy_send_client_synack(struct net *net,
const struct sk_buff *skb, const struct tcphdr *th,
const struct synproxy_options *opts)
{
@@ -103,7 +103,7 @@ synproxy_send_client_synack(const struct synproxy_net *snet,
return;
skb_reserve(nskb, MAX_TCP_HEADER);
- niph = synproxy_build_ip(nskb, &iph->daddr, &iph->saddr);
+ niph = synproxy_build_ip(net, nskb, &iph->daddr, &iph->saddr);
skb_reset_transport_header(nskb);
nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
@@ -121,15 +121,16 @@ synproxy_send_client_synack(const struct synproxy_net *snet,
synproxy_build_options(nth, opts);
- synproxy_send_tcp(snet, skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
+ synproxy_send_tcp(net, skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
niph, nth, tcp_hdr_size);
}
static void
-synproxy_send_server_syn(const struct synproxy_net *snet,
+synproxy_send_server_syn(struct net *net,
const struct sk_buff *skb, const struct tcphdr *th,
const struct synproxy_options *opts, u32 recv_seq)
{
+ struct synproxy_net *snet = synproxy_pernet(net);
struct sk_buff *nskb;
struct ipv6hdr *iph, *niph;
struct tcphdr *nth;
@@ -144,7 +145,7 @@ synproxy_send_server_syn(const struct synproxy_net *snet,
return;
skb_reserve(nskb, MAX_TCP_HEADER);
- niph = synproxy_build_ip(nskb, &iph->saddr, &iph->daddr);
+ niph = synproxy_build_ip(net, nskb, &iph->saddr, &iph->daddr);
skb_reset_transport_header(nskb);
nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
@@ -165,12 +166,12 @@ synproxy_send_server_syn(const struct synproxy_net *snet,
synproxy_build_options(nth, opts);
- synproxy_send_tcp(snet, skb, nskb, &snet->tmpl->ct_general, IP_CT_NEW,
+ synproxy_send_tcp(net, skb, nskb, &snet->tmpl->ct_general, IP_CT_NEW,
niph, nth, tcp_hdr_size);
}
static void
-synproxy_send_server_ack(const struct synproxy_net *snet,
+synproxy_send_server_ack(struct net *net,
const struct ip_ct_tcp *state,
const struct sk_buff *skb, const struct tcphdr *th,
const struct synproxy_options *opts)
@@ -189,7 +190,7 @@ synproxy_send_server_ack(const struct synproxy_net *snet,
return;
skb_reserve(nskb, MAX_TCP_HEADER);
- niph = synproxy_build_ip(nskb, &iph->daddr, &iph->saddr);
+ niph = synproxy_build_ip(net, nskb, &iph->daddr, &iph->saddr);
skb_reset_transport_header(nskb);
nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
@@ -205,11 +206,11 @@ synproxy_send_server_ack(const struct synproxy_net *snet,
synproxy_build_options(nth, opts);
- synproxy_send_tcp(snet, skb, nskb, NULL, 0, niph, nth, tcp_hdr_size);
+ synproxy_send_tcp(net, skb, nskb, NULL, 0, niph, nth, tcp_hdr_size);
}
static void
-synproxy_send_client_ack(const struct synproxy_net *snet,
+synproxy_send_client_ack(struct net *net,
const struct sk_buff *skb, const struct tcphdr *th,
const struct synproxy_options *opts)
{
@@ -227,7 +228,7 @@ synproxy_send_client_ack(const struct synproxy_net *snet,
return;
skb_reserve(nskb, MAX_TCP_HEADER);
- niph = synproxy_build_ip(nskb, &iph->saddr, &iph->daddr);
+ niph = synproxy_build_ip(net, nskb, &iph->saddr, &iph->daddr);
skb_reset_transport_header(nskb);
nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
@@ -243,15 +244,16 @@ synproxy_send_client_ack(const struct synproxy_net *snet,
synproxy_build_options(nth, opts);
- synproxy_send_tcp(snet, skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
+ synproxy_send_tcp(net, skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
niph, nth, tcp_hdr_size);
}
static bool
-synproxy_recv_client_ack(const struct synproxy_net *snet,
+synproxy_recv_client_ack(struct net *net,
const struct sk_buff *skb, const struct tcphdr *th,
struct synproxy_options *opts, u32 recv_seq)
{
+ struct synproxy_net *snet = synproxy_pernet(net);
int mss;
mss = __cookie_v6_check(ipv6_hdr(skb), th, ntohl(th->ack_seq) - 1);
@@ -267,7 +269,7 @@ synproxy_recv_client_ack(const struct synproxy_net *snet,
if (opts->options & XT_SYNPROXY_OPT_TIMESTAMP)
synproxy_check_timestamp_cookie(opts);
- synproxy_send_server_syn(snet, skb, th, opts, recv_seq);
+ synproxy_send_server_syn(net, skb, th, opts, recv_seq);
return true;
}
@@ -275,7 +277,8 @@ static unsigned int
synproxy_tg6(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct xt_synproxy_info *info = par->targinfo;
- struct synproxy_net *snet = synproxy_pernet(par->net);
+ struct net *net = par->net;
+ struct synproxy_net *snet = synproxy_pernet(net);
struct synproxy_options opts = {};
struct tcphdr *th, _th;
@@ -304,12 +307,12 @@ synproxy_tg6(struct sk_buff *skb, const struct xt_action_param *par)
XT_SYNPROXY_OPT_SACK_PERM |
XT_SYNPROXY_OPT_ECN);
- synproxy_send_client_synack(snet, skb, th, &opts);
+ synproxy_send_client_synack(net, skb, th, &opts);
return NF_DROP;
} else if (th->ack && !(th->fin || th->rst || th->syn)) {
/* ACK from client */
- synproxy_recv_client_ack(snet, skb, th, &opts, ntohl(th->seq));
+ synproxy_recv_client_ack(net, skb, th, &opts, ntohl(th->seq));
return NF_DROP;
}
@@ -320,7 +323,8 @@ static unsigned int ipv6_synproxy_hook(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *nhs)
{
- struct synproxy_net *snet = synproxy_pernet(nhs->net);
+ struct net *net = nhs->net;
+ struct synproxy_net *snet = synproxy_pernet(net);
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
struct nf_conn_synproxy *synproxy;
@@ -384,7 +388,7 @@ static unsigned int ipv6_synproxy_hook(void *priv,
* therefore we need to add 1 to make the SYN sequence
* number match the one of first SYN.
*/
- if (synproxy_recv_client_ack(snet, skb, th, &opts,
+ if (synproxy_recv_client_ack(net, skb, th, &opts,
ntohl(th->seq) + 1))
this_cpu_inc(snet->stats->cookie_retrans);
@@ -410,12 +414,12 @@ static unsigned int ipv6_synproxy_hook(void *priv,
XT_SYNPROXY_OPT_SACK_PERM);
swap(opts.tsval, opts.tsecr);
- synproxy_send_server_ack(snet, state, skb, th, &opts);
+ synproxy_send_server_ack(net, state, skb, th, &opts);
nf_ct_seqadj_init(ct, ctinfo, synproxy->isn - ntohl(th->seq));
swap(opts.tsval, opts.tsecr);
- synproxy_send_client_ack(snet, skb, th, &opts);
+ synproxy_send_client_ack(net, skb, th, &opts);
consume_skb(skb);
return NF_STOLEN;
diff --git a/net/ipv6/netfilter/nf_reject_ipv6.c b/net/ipv6/netfilter/nf_reject_ipv6.c
index 4709f657b7b6..a5400223fd74 100644
--- a/net/ipv6/netfilter/nf_reject_ipv6.c
+++ b/net/ipv6/netfilter/nf_reject_ipv6.c
@@ -158,7 +158,7 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
fl6.fl6_dport = otcph->source;
security_skb_classify_flow(oldskb, flowi6_to_flowi(&fl6));
dst = ip6_route_output(net, NULL, &fl6);
- if (dst == NULL || dst->error) {
+ if (dst->error) {
dst_release(dst);
return;
}
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index afde5f5e728a..2fd607408998 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -12,6 +12,8 @@
* published by the Free Software Foundation.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
@@ -966,7 +968,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
if (!l4proto->new(ct, skb, dataoff, timeouts)) {
nf_conntrack_free(ct);
- pr_debug("init conntrack: can't track with proto module\n");
+ pr_debug("can't track with proto module\n");
return NULL;
}
@@ -988,7 +990,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
spin_lock(&nf_conntrack_expect_lock);
exp = nf_ct_find_expectation(net, zone, tuple);
if (exp) {
- pr_debug("conntrack: expectation arrives ct=%p exp=%p\n",
+ pr_debug("expectation arrives ct=%p exp=%p\n",
ct, exp);
/* Welcome, Mr. Bond. We've been expecting you... */
__set_bit(IPS_EXPECTED_BIT, &ct->status);
@@ -1053,7 +1055,7 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
if (!nf_ct_get_tuple(skb, skb_network_offset(skb),
dataoff, l3num, protonum, net, &tuple, l3proto,
l4proto)) {
- pr_debug("resolve_normal_ct: Can't get tuple\n");
+ pr_debug("Can't get tuple\n");
return NULL;
}
@@ -1079,14 +1081,13 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
} else {
/* Once we've had two way comms, always ESTABLISHED. */
if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
- pr_debug("nf_conntrack_in: normal packet for %p\n", ct);
+ pr_debug("normal packet for %p\n", ct);
*ctinfo = IP_CT_ESTABLISHED;
} else if (test_bit(IPS_EXPECTED_BIT, &ct->status)) {
- pr_debug("nf_conntrack_in: related packet for %p\n",
- ct);
+ pr_debug("related packet for %p\n", ct);
*ctinfo = IP_CT_RELATED;
} else {
- pr_debug("nf_conntrack_in: new packet for %p\n", ct);
+ pr_debug("new packet for %p\n", ct);
*ctinfo = IP_CT_NEW;
}
*set_reply = 0;
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index 4e78c57b818f..d28011b42845 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -113,6 +113,60 @@ static void ecache_work(struct work_struct *work)
schedule_delayed_work(&ctnet->ecache_dwork, delay);
}
+int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
+ u32 portid, int report)
+{
+ int ret = 0;
+ struct net *net = nf_ct_net(ct);
+ struct nf_ct_event_notifier *notify;
+ struct nf_conntrack_ecache *e;
+
+ rcu_read_lock();
+ notify = rcu_dereference(net->ct.nf_conntrack_event_cb);
+ if (!notify)
+ goto out_unlock;
+
+ e = nf_ct_ecache_find(ct);
+ if (!e)
+ goto out_unlock;
+
+ if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) {
+ struct nf_ct_event item = {
+ .ct = ct,
+ .portid = e->portid ? e->portid : portid,
+ .report = report
+ };
+ /* This is a resent of a destroy event? If so, skip missed */
+ unsigned long missed = e->portid ? 0 : e->missed;
+
+ if (!((eventmask | missed) & e->ctmask))
+ goto out_unlock;
+
+ ret = notify->fcn(eventmask | missed, &item);
+ if (unlikely(ret < 0 || missed)) {
+ spin_lock_bh(&ct->lock);
+ if (ret < 0) {
+ /* This is a destroy event that has been
+ * triggered by a process, we store the PORTID
+ * to include it in the retransmission.
+ */
+ if (eventmask & (1 << IPCT_DESTROY) &&
+ e->portid == 0 && portid != 0)
+ e->portid = portid;
+ else
+ e->missed |= eventmask;
+ } else {
+ e->missed &= ~missed;
+ }
+ spin_unlock_bh(&ct->lock);
+ }
+ }
+out_unlock:
+ rcu_read_unlock();
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_eventmask_report);
+
/* deliver cached events and clear cache entry - must be called with locally
* disabled softirqs */
void nf_ct_deliver_cached_events(struct nf_conn *ct)
@@ -167,6 +221,36 @@ out_unlock:
}
EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);
+void nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
+ struct nf_conntrack_expect *exp,
+ u32 portid, int report)
+
+{
+ struct net *net = nf_ct_exp_net(exp);
+ struct nf_exp_event_notifier *notify;
+ struct nf_conntrack_ecache *e;
+
+ rcu_read_lock();
+ notify = rcu_dereference(net->ct.nf_expect_event_cb);
+ if (!notify)
+ goto out_unlock;
+
+ e = nf_ct_ecache_find(exp->master);
+ if (!e)
+ goto out_unlock;
+
+ if (e->expmask & (1 << event)) {
+ struct nf_exp_event item = {
+ .exp = exp,
+ .portid = portid,
+ .report = report
+ };
+ notify->fcn(1 << event, &item);
+ }
+out_unlock:
+ rcu_read_unlock();
+}
+
int nf_conntrack_register_notifier(struct net *net,
struct nf_ct_event_notifier *new)
{
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index cb5b630a645b..aa93877ab6e2 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -295,6 +295,59 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
return seclen;
}
+static u32 nfqnl_get_bridge_size(struct nf_queue_entry *entry)
+{
+ struct sk_buff *entskb = entry->skb;
+ u32 nlalen = 0;
+
+ if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb))
+ return 0;
+
+ if (skb_vlan_tag_present(entskb))
+ nlalen += nla_total_size(nla_total_size(sizeof(__be16)) +
+ nla_total_size(sizeof(__be16)));
+
+ if (entskb->network_header > entskb->mac_header)
+ nlalen += nla_total_size((entskb->network_header -
+ entskb->mac_header));
+
+ return nlalen;
+}
+
+static int nfqnl_put_bridge(struct nf_queue_entry *entry, struct sk_buff *skb)
+{
+ struct sk_buff *entskb = entry->skb;
+
+ if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb))
+ return 0;
+
+ if (skb_vlan_tag_present(entskb)) {
+ struct nlattr *nest;
+
+ nest = nla_nest_start(skb, NFQA_VLAN | NLA_F_NESTED);
+ if (!nest)
+ goto nla_put_failure;
+
+ if (nla_put_be16(skb, NFQA_VLAN_TCI, htons(entskb->vlan_tci)) ||
+ nla_put_be16(skb, NFQA_VLAN_PROTO, entskb->vlan_proto))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, nest);
+ }
+
+ if (entskb->mac_header < entskb->network_header) {
+ int len = (int)(entskb->network_header - entskb->mac_header);
+
+ if (nla_put(skb, NFQA_L2HDR, len, skb_mac_header(entskb)))
+ goto nla_put_failure;
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -1;
+}
+
static struct sk_buff *
nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
struct nf_queue_entry *entry,
@@ -334,6 +387,8 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
if (entskb->tstamp.tv64)
size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
+ size += nfqnl_get_bridge_size(entry);
+
if (entry->state.hook <= NF_INET_FORWARD ||
(entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL))
csum_verify = !skb_csum_unnecessary(entskb);
@@ -497,6 +552,9 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
}
}
+ if (nfqnl_put_bridge(entry, skb) < 0)
+ goto nla_put_failure;
+
if (entskb->tstamp.tv64) {
struct nfqnl_msg_packet_timestamp ts;
struct timespec64 kts = ktime_to_timespec64(skb->tstamp);
@@ -911,12 +969,18 @@ static struct notifier_block nfqnl_rtnl_notifier = {
.notifier_call = nfqnl_rcv_nl_event,
};
+static const struct nla_policy nfqa_vlan_policy[NFQA_VLAN_MAX + 1] = {
+ [NFQA_VLAN_TCI] = { .type = NLA_U16},
+ [NFQA_VLAN_PROTO] = { .type = NLA_U16},
+};
+
static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
[NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
[NFQA_MARK] = { .type = NLA_U32 },
[NFQA_PAYLOAD] = { .type = NLA_UNSPEC },
[NFQA_CT] = { .type = NLA_UNSPEC },
[NFQA_EXP] = { .type = NLA_UNSPEC },
+ [NFQA_VLAN] = { .type = NLA_NESTED },
};
static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
@@ -1030,6 +1094,40 @@ static struct nf_conn *nfqnl_ct_parse(struct nfnl_ct_hook *nfnl_ct,
return ct;
}
+static int nfqa_parse_bridge(struct nf_queue_entry *entry,
+ const struct nlattr * const nfqa[])
+{
+ if (nfqa[NFQA_VLAN]) {
+ struct nlattr *tb[NFQA_VLAN_MAX + 1];
+ int err;
+
+ err = nla_parse_nested(tb, NFQA_VLAN_MAX, nfqa[NFQA_VLAN],
+ nfqa_vlan_policy);
+ if (err < 0)
+ return err;
+
+ if (!tb[NFQA_VLAN_TCI] || !tb[NFQA_VLAN_PROTO])
+ return -EINVAL;
+
+ entry->skb->vlan_tci = ntohs(nla_get_be16(tb[NFQA_VLAN_TCI]));
+ entry->skb->vlan_proto = nla_get_be16(tb[NFQA_VLAN_PROTO]);
+ }
+
+ if (nfqa[NFQA_L2HDR]) {
+ int mac_header_len = entry->skb->network_header -
+ entry->skb->mac_header;
+
+ if (mac_header_len != nla_len(nfqa[NFQA_L2HDR]))
+ return -EINVAL;
+ else if (mac_header_len > 0)
+ memcpy(skb_mac_header(entry->skb),
+ nla_data(nfqa[NFQA_L2HDR]),
+ mac_header_len);
+ }
+
+ return 0;
+}
+
static int nfqnl_recv_verdict(struct net *net, struct sock *ctnl,
struct sk_buff *skb,
const struct nlmsghdr *nlh,
@@ -1045,6 +1143,7 @@ static int nfqnl_recv_verdict(struct net *net, struct sock *ctnl,
struct nfnl_ct_hook *nfnl_ct;
struct nf_conn *ct = NULL;
struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+ int err;
queue = instance_lookup(q, queue_num);
if (!queue)
@@ -1071,6 +1170,12 @@ static int nfqnl_recv_verdict(struct net *net, struct sock *ctnl,
ct = nfqnl_ct_parse(nfnl_ct, nlh, nfqa, entry, &ctinfo);
}
+ if (entry->state.pf == PF_BRIDGE) {
+ err = nfqa_parse_bridge(entry, nfqa);
+ if (err < 0)
+ return err;
+ }
+
if (nfqa[NFQA_PAYLOAD]) {
u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]);
int diff = payload_len - entry->skb->len;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.