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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-23 11:47:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-23 11:47:02 -0700
commit5f05647dd81c11a6a165ccc8f0c1370b16f3bcb0 (patch)
tree7851ef1c93aa1aba7ef327ca4b75fd35e6d10f29 /net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
parent02f36038c568111ad4fc433f6fa760ff5e38fab4 (diff)
parentec37a48d1d16c30b655ac5280209edf52a6775d4 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1699 commits) bnx2/bnx2x: Unsupported Ethtool operations should return -EINVAL. vlan: Calling vlan_hwaccel_do_receive() is always valid. tproxy: use the interface primary IP address as a default value for --on-ip tproxy: added IPv6 support to the socket match cxgb3: function namespace cleanup tproxy: added IPv6 support to the TPROXY target tproxy: added IPv6 socket lookup function to nf_tproxy_core be2net: Changes to use only priority codes allowed by f/w tproxy: allow non-local binds of IPv6 sockets if IP_TRANSPARENT is enabled tproxy: added tproxy sockopt interface in the IPV6 layer tproxy: added udp6_lib_lookup function tproxy: added const specifiers to udp lookup functions tproxy: split off ipv6 defragmentation to a separate module l2tp: small cleanup nf_nat: restrict ICMP translation for embedded header can: mcp251x: fix generation of error frames can: mcp251x: fix endless loop in interrupt handler if CANINTF_MERRF is set can-raw: add msg_flags to distinguish local traffic 9p: client code cleanup rds: make local functions/variables static ... Fix up conflicts in net/core/dev.c, drivers/net/pcmcia/smc91c92_cs.c and drivers/net/wireless/ath/ath9k/debug.c as per David
Diffstat (limited to 'net/ipv6/netfilter/nf_defrag_ipv6_hooks.c')
-rw-r--r--net/ipv6/netfilter/nf_defrag_ipv6_hooks.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
new file mode 100644
index 000000000000..99abfb53bab9
--- /dev/null
+++ b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
@@ -0,0 +1,131 @@
+/* (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2004 Netfilter Core Team <coreteam@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.
+ */
+
+#include <linux/types.h>
+#include <linux/ipv6.h>
+#include <linux/in6.h>
+#include <linux/netfilter.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/icmp.h>
+#include <linux/sysctl.h>
+#include <net/ipv6.h>
+#include <net/inet_frag.h>
+
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter_bridge.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_l4proto.h>
+#include <net/netfilter/nf_conntrack_l3proto.h>
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack_zones.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
+
+static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
+ struct sk_buff *skb)
+{
+ u16 zone = NF_CT_DEFAULT_ZONE;
+
+ if (skb->nfct)
+ zone = nf_ct_zone((struct nf_conn *)skb->nfct);
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (skb->nf_bridge &&
+ skb->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)
+ return IP6_DEFRAG_CONNTRACK_BRIDGE_IN + zone;
+#endif
+ if (hooknum == NF_INET_PRE_ROUTING)
+ return IP6_DEFRAG_CONNTRACK_IN + zone;
+ else
+ return IP6_DEFRAG_CONNTRACK_OUT + zone;
+
+}
+
+static unsigned int ipv6_defrag(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;
+
+ /* Previously seen (loopback)? */
+ if (skb->nfct && !nf_ct_is_template((struct nf_conn *)skb->nfct))
+ return NF_ACCEPT;
+
+ reasm = nf_ct_frag6_gather(skb, nf_ct6_defrag_user(hooknum, skb));
+ /* queued */
+ if (reasm == NULL)
+ return NF_STOLEN;
+
+ /* error occured or not fragmented */
+ if (reasm == skb)
+ return NF_ACCEPT;
+
+ nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in,
+ (struct net_device *)out, okfn);
+
+ return NF_STOLEN;
+}
+
+static struct nf_hook_ops ipv6_defrag_ops[] = {
+ {
+ .hook = ipv6_defrag,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_PRE_ROUTING,
+ .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
+ },
+ {
+ .hook = ipv6_defrag,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
+ },
+};
+
+static int __init nf_defrag_init(void)
+{
+ int ret = 0;
+
+ ret = nf_ct_frag6_init();
+ if (ret < 0) {
+ pr_err("nf_defrag_ipv6: can't initialize frag6.\n");
+ return ret;
+ }
+ ret = nf_register_hooks(ipv6_defrag_ops, ARRAY_SIZE(ipv6_defrag_ops));
+ if (ret < 0) {
+ pr_err("nf_defrag_ipv6: can't register hooks\n");
+ goto cleanup_frag6;
+ }
+ return ret;
+
+cleanup_frag6:
+ nf_ct_frag6_cleanup();
+ return ret;
+
+}
+
+static void __exit nf_defrag_fini(void)
+{
+ nf_unregister_hooks(ipv6_defrag_ops, ARRAY_SIZE(ipv6_defrag_ops));
+ nf_ct_frag6_cleanup();
+}
+
+void nf_defrag_ipv6_enable(void)
+{
+}
+EXPORT_SYMBOL_GPL(nf_defrag_ipv6_enable);
+
+module_init(nf_defrag_init);
+module_exit(nf_defrag_fini);
+
+MODULE_LICENSE("GPL");