summaryrefslogtreecommitdiffstats
path: root/net
diff options
context:
space:
mode:
authorEric Leblond <eric@regit.org>2013-12-29 12:28:14 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2013-12-30 18:15:38 +0100
commitbee11dc78fc8a41299be5ce04b1c76b0057af450 (patch)
tree0717e96f0f1cbfca4373dc0fa867b3b888267f16 /net
parentcc70d069e2b9cece683206c0f6a1d1484414e577 (diff)
downloadop-kernel-dev-bee11dc78fc8a41299be5ce04b1c76b0057af450.zip
op-kernel-dev-bee11dc78fc8a41299be5ce04b1c76b0057af450.tar.gz
netfilter: nft_reject: support for IPv6 and TCP reset
This patch moves nft_reject_ipv4 to nft_reject and adds support for IPv6 protocol. This patch uses functions included in nf_reject.h to implement reject by TCP reset. The code has to be build as a module if NF_TABLES_IPV6 is also a module to avoid compilation error due to usage of IPv6 functions. This has been done in Kconfig by using the construct: depends on NF_TABLES_IPV6 || !NF_TABLES_IPV6 This seems a bit weird in terms of syntax but works perfectly. Signed-off-by: Eric Leblond <eric@regit.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/Kconfig4
-rw-r--r--net/ipv4/netfilter/Makefile1
-rw-r--r--net/netfilter/Kconfig6
-rw-r--r--net/netfilter/Makefile1
-rw-r--r--net/netfilter/nft_reject.c (renamed from net/ipv4/netfilter/nft_reject_ipv4.c)25
5 files changed, 30 insertions, 7 deletions
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 40d5607..9d3d69a 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -40,10 +40,6 @@ config NF_TABLES_IPV4
depends on NF_TABLES
tristate "IPv4 nf_tables support"
-config NFT_REJECT_IPV4
- depends on NF_TABLES_IPV4
- tristate "nf_tables IPv4 reject support"
-
config NFT_CHAIN_ROUTE_IPV4
depends on NF_TABLES_IPV4
tristate "IPv4 nf_tables route chain support"
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 19df72b..c16be9d 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -28,7 +28,6 @@ obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o
obj-$(CONFIG_NF_NAT_PROTO_GRE) += nf_nat_proto_gre.o
obj-$(CONFIG_NF_TABLES_IPV4) += nf_tables_ipv4.o
-obj-$(CONFIG_NFT_REJECT_IPV4) += nft_reject_ipv4.o
obj-$(CONFIG_NFT_CHAIN_ROUTE_IPV4) += nft_chain_route_ipv4.o
obj-$(CONFIG_NFT_CHAIN_NAT_IPV4) += nft_chain_nat_ipv4.o
obj-$(CONFIG_NF_TABLES_ARP) += nf_tables_arp.o
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 01f9f64..a1dec61 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -465,6 +465,12 @@ config NFT_QUEUE
This is required if you intend to use the userspace queueing
infrastructure (also known as NFQUEUE) from nftables.
+config NFT_REJECT
+ depends on NF_TABLES
+ depends on NF_TABLES_IPV6 || !NF_TABLES_IPV6
+ default m if NETFILTER_ADVANCED=n
+ tristate "Netfilter nf_tables reject support"
+
config NFT_COMPAT
depends on NF_TABLES
depends on NETFILTER_XTABLES
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index dcc818a..39e4a7b 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_NFT_CT) += nft_ct.o
obj-$(CONFIG_NFT_LIMIT) += nft_limit.o
obj-$(CONFIG_NFT_NAT) += nft_nat.o
obj-$(CONFIG_NFT_QUEUE) += nft_queue.o
+obj-$(CONFIG_NFT_REJECT) += nft_reject.o
obj-$(CONFIG_NFT_RBTREE) += nft_rbtree.o
obj-$(CONFIG_NFT_HASH) += nft_hash.o
obj-$(CONFIG_NFT_COUNTER) += nft_counter.o
diff --git a/net/ipv4/netfilter/nft_reject_ipv4.c b/net/netfilter/nft_reject.c
index fff5ba1..0d690d4 100644
--- a/net/ipv4/netfilter/nft_reject_ipv4.c
+++ b/net/netfilter/nft_reject.c
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2013 Eric Leblond <eric@regit.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
@@ -16,10 +17,16 @@
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/icmp.h>
+#include <net/netfilter/ipv4/nf_reject.h>
+
+#if IS_ENABLED(CONFIG_NF_TABLES_IPV6)
+#include <net/netfilter/ipv6/nf_reject.h>
+#endif
struct nft_reject {
enum nft_reject_types type:8;
u8 icmp_code;
+ u8 family;
};
static void nft_reject_eval(const struct nft_expr *expr,
@@ -27,12 +34,25 @@ static void nft_reject_eval(const struct nft_expr *expr,
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
+ struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
- icmp_send(pkt->skb, ICMP_DEST_UNREACH, priv->icmp_code, 0);
+ if (priv->family == NFPROTO_IPV4)
+ nf_send_unreach(pkt->skb, priv->icmp_code);
+#if IS_ENABLED(CONFIG_NF_TABLES_IPV6)
+ else if (priv->family == NFPROTO_IPV6)
+ nf_send_unreach6(net, pkt->skb, priv->icmp_code,
+ pkt->hooknum);
+#endif
break;
case NFT_REJECT_TCP_RST:
+ if (priv->family == NFPROTO_IPV4)
+ nf_send_reset(pkt->skb, pkt->hooknum);
+#if IS_ENABLED(CONFIG_NF_TABLES_IPV6)
+ else if (priv->family == NFPROTO_IPV6)
+ nf_send_reset6(net, pkt->skb, pkt->hooknum);
+#endif
break;
}
@@ -53,6 +73,7 @@ static int nft_reject_init(const struct nft_ctx *ctx,
if (tb[NFTA_REJECT_TYPE] == NULL)
return -EINVAL;
+ priv->family = ctx->afi->family;
priv->type = ntohl(nla_get_be32(tb[NFTA_REJECT_TYPE]));
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
@@ -72,7 +93,7 @@ static int nft_reject_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
const struct nft_reject *priv = nft_expr_priv(expr);
- if (nla_put_be32(skb, NFTA_REJECT_TYPE, priv->type))
+ if (nla_put_be32(skb, NFTA_REJECT_TYPE, htonl(priv->type)))
goto nla_put_failure;
switch (priv->type) {
OpenPOWER on IntegriCloud