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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-16 16:29:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-16 16:29:25 -0700
commit7a6362800cb7d1d618a697a650c7aaed3eb39320 (patch)
tree087f9bc6c13ef1fad4b392c5cf9325cd28fa8523 /net/netfilter/nf_conntrack_broadcast.c
parent6445ced8670f37cfc2c5e24a9de9b413dbfc788d (diff)
parentceda86a108671294052cbf51660097b6534672f5 (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: (1480 commits) bonding: enable netpoll without checking link status xfrm: Refcount destination entry on xfrm_lookup net: introduce rx_handler results and logic around that bonding: get rid of IFF_SLAVE_INACTIVE netdev->priv_flag bonding: wrap slave state work net: get rid of multiple bond-related netdevice->priv_flags bonding: register slave pointer for rx_handler be2net: Bump up the version number be2net: Copyright notice change. Update to Emulex instead of ServerEngines e1000e: fix kconfig for crc32 dependency netfilter ebtables: fix xt_AUDIT to work with ebtables xen network backend driver bonding: Improve syslog message at device creation time bonding: Call netif_carrier_off after register_netdevice bonding: Incorrect TX queue offset net_sched: fix ip_tos2prio xfrm: fix __xfrm_route_forward() be2net: Fix UDP packet detected status in RX compl Phonet: fix aligned-mode pipe socket buffer header reserve netxen: support for GbE port settings ... Fix up conflicts in drivers/staging/brcm80211/brcmsmac/wl_mac80211.c with the staging updates.
Diffstat (limited to 'net/netfilter/nf_conntrack_broadcast.c')
-rw-r--r--net/netfilter/nf_conntrack_broadcast.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c
new file mode 100644
index 000000000000..4e99cca61612
--- /dev/null
+++ b/net/netfilter/nf_conntrack_broadcast.c
@@ -0,0 +1,82 @@
+/*
+ * broadcast connection tracking helper
+ *
+ * (c) 2005 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <net/route.h>
+#include <linux/inetdevice.h>
+#include <linux/skbuff.h>
+
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_expect.h>
+
+int nf_conntrack_broadcast_help(struct sk_buff *skb,
+ unsigned int protoff,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int timeout)
+{
+ struct nf_conntrack_expect *exp;
+ struct iphdr *iph = ip_hdr(skb);
+ struct rtable *rt = skb_rtable(skb);
+ struct in_device *in_dev;
+ struct nf_conn_help *help = nfct_help(ct);
+ __be32 mask = 0;
+
+ /* we're only interested in locally generated packets */
+ if (skb->sk == NULL)
+ goto out;
+ if (rt == NULL || !(rt->rt_flags & RTCF_BROADCAST))
+ goto out;
+ if (CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL)
+ goto out;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(rt->dst.dev);
+ if (in_dev != NULL) {
+ for_primary_ifa(in_dev) {
+ if (ifa->ifa_broadcast == iph->daddr) {
+ mask = ifa->ifa_mask;
+ break;
+ }
+ } endfor_ifa(in_dev);
+ }
+ rcu_read_unlock();
+
+ if (mask == 0)
+ goto out;
+
+ exp = nf_ct_expect_alloc(ct);
+ if (exp == NULL)
+ goto out;
+
+ exp->tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+ exp->tuple.src.u.udp.port = help->helper->tuple.src.u.udp.port;
+
+ exp->mask.src.u3.ip = mask;
+ exp->mask.src.u.udp.port = htons(0xFFFF);
+
+ exp->expectfn = NULL;
+ exp->flags = NF_CT_EXPECT_PERMANENT;
+ exp->class = NF_CT_EXPECT_CLASS_DEFAULT;
+ exp->helper = NULL;
+
+ nf_ct_expect_related(exp);
+ nf_ct_expect_put(exp);
+
+ nf_ct_refresh(ct, skb, timeout * HZ);
+out:
+ return NF_ACCEPT;
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_broadcast_help);
+
+MODULE_LICENSE("GPL");