Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25: (1470 commits)
  [IPV6] ADDRLABEL: Fix double free on label deletion.
  [PPP]: Sparse warning fixes.
  [IPV4] fib_trie: remove unneeded NULL check
  [IPV4] fib_trie: More whitespace cleanup.
  [NET_SCHED]: Use nla_policy for attribute validation in ematches
  [NET_SCHED]: Use nla_policy for attribute validation in actions
  [NET_SCHED]: Use nla_policy for attribute validation in classifiers
  [NET_SCHED]: Use nla_policy for attribute validation in packet schedulers
  [NET_SCHED]: sch_api: introduce constant for rate table size
  [NET_SCHED]: Use typeful attribute parsing helpers
  [NET_SCHED]: Use typeful attribute construction helpers
  [NET_SCHED]: Use NLA_PUT_STRING for string dumping
  [NET_SCHED]: Use nla_nest_start/nla_nest_end
  [NET_SCHED]: Propagate nla_parse return value
  [NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get
  [NET_SCHED]: act_api: use nlmsg_parse
  [NET_SCHED]: act_api: fix netlink API conversion bug
  [NET_SCHED]: sch_netem: use nla_parse_nested_compat
  [NET_SCHED]: sch_atm: fix format string warning
  [NETNS]: Add namespace for ICMP replying code.
  ...

1 files changed, 180 insertions, 0 deletions

diff --git a/net/netfilter/xt_iprange.c b/net/netfilter/xt_iprange.c
new file mode 100644
index 00000000000..dbea0e0893f
--- /dev/null
+++ b/net/netfilter/xt_iprange.c
@@ -0,0 +1,180 @@
+/*
+ *	xt_iprange - Netfilter module to match IP address ranges
+ *
+ *	(C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ *	(C) CC Computer Consultants GmbH, 2008
+ *
+ *	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/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_iprange.h>
+
+static bool
+iprange_mt_v0(const struct sk_buff *skb, const struct net_device *in,
+              const struct net_device *out, const struct xt_match *match,
+              const void *matchinfo, int offset, unsigned int protoff,
+              bool *hotdrop)
+{
+	const struct ipt_iprange_info *info = matchinfo;
+	const struct iphdr *iph = ip_hdr(skb);
+
+	if (info->flags & IPRANGE_SRC) {
+		if ((ntohl(iph->saddr) < ntohl(info->src.min_ip)
+			  || ntohl(iph->saddr) > ntohl(info->src.max_ip))
+			 ^ !!(info->flags & IPRANGE_SRC_INV)) {
+			pr_debug("src IP %u.%u.%u.%u NOT in range %s"
+				 "%u.%u.%u.%u-%u.%u.%u.%u\n",
+				 NIPQUAD(iph->saddr),
+				 info->flags & IPRANGE_SRC_INV ? "(INV) " : "",
+				 NIPQUAD(info->src.min_ip),
+				 NIPQUAD(info->src.max_ip));
+			return false;
+		}
+	}
+	if (info->flags & IPRANGE_DST) {
+		if ((ntohl(iph->daddr) < ntohl(info->dst.min_ip)
+			  || ntohl(iph->daddr) > ntohl(info->dst.max_ip))
+			 ^ !!(info->flags & IPRANGE_DST_INV)) {
+			pr_debug("dst IP %u.%u.%u.%u NOT in range %s"
+				 "%u.%u.%u.%u-%u.%u.%u.%u\n",
+				 NIPQUAD(iph->daddr),
+				 info->flags & IPRANGE_DST_INV ? "(INV) " : "",
+				 NIPQUAD(info->dst.min_ip),
+				 NIPQUAD(info->dst.max_ip));
+			return false;
+		}
+	}
+	return true;
+}
+
+static bool
+iprange_mt4(const struct sk_buff *skb, const struct net_device *in,
+            const struct net_device *out, const struct xt_match *match,
+            const void *matchinfo, int offset, unsigned int protoff,
+            bool *hotdrop)
+{
+	const struct xt_iprange_mtinfo *info = matchinfo;
+	const struct iphdr *iph = ip_hdr(skb);
+	bool m;
+
+	if (info->flags & IPRANGE_SRC) {
+		m  = ntohl(iph->saddr) < ntohl(info->src_min.ip);
+		m |= ntohl(iph->saddr) > ntohl(info->src_max.ip);
+		m ^= info->flags & IPRANGE_SRC_INV;
+		if (m) {
+			pr_debug("src IP " NIPQUAD_FMT " NOT in range %s"
+			         NIPQUAD_FMT "-" NIPQUAD_FMT "\n",
+			         NIPQUAD(iph->saddr),
+			         (info->flags & IPRANGE_SRC_INV) ? "(INV) " : "",
+			         NIPQUAD(info->src_max.ip),
+			         NIPQUAD(info->src_max.ip));
+			return false;
+		}
+	}
+	if (info->flags & IPRANGE_DST) {
+		m  = ntohl(iph->daddr) < ntohl(info->dst_min.ip);
+		m |= ntohl(iph->daddr) > ntohl(info->dst_max.ip);
+		m ^= info->flags & IPRANGE_DST_INV;
+		if (m) {
+			pr_debug("dst IP " NIPQUAD_FMT " NOT in range %s"
+			         NIPQUAD_FMT "-" NIPQUAD_FMT "\n",
+			         NIPQUAD(iph->daddr),
+			         (info->flags & IPRANGE_DST_INV) ? "(INV) " : "",
+			         NIPQUAD(info->dst_min.ip),
+			         NIPQUAD(info->dst_max.ip));
+			return false;
+		}
+	}
+	return true;
+}
+
+static inline int
+iprange_ipv6_sub(const struct in6_addr *a, const struct in6_addr *b)
+{
+	unsigned int i;
+	int r;
+
+	for (i = 0; i < 4; ++i) {
+		r = a->s6_addr32[i] - b->s6_addr32[i];
+		if (r != 0)
+			return r;
+	}
+
+	return 0;
+}
+
+static bool
+iprange_mt6(const struct sk_buff *skb, const struct net_device *in,
+            const struct net_device *out, const struct xt_match *match,
+            const void *matchinfo, int offset, unsigned int protoff,
+            bool *hotdrop)
+{
+	const struct xt_iprange_mtinfo *info = matchinfo;
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
+	bool m;
+
+	if (info->flags & IPRANGE_SRC) {
+		m  = iprange_ipv6_sub(&iph->saddr, &info->src_min.in6) < 0;
+		m |= iprange_ipv6_sub(&iph->saddr, &info->src_max.in6) > 0;
+		m ^= info->flags & IPRANGE_SRC_INV;
+		if (m)
+			return false;
+	}
+	if (info->flags & IPRANGE_DST) {
+		m  = iprange_ipv6_sub(&iph->daddr, &info->dst_min.in6) < 0;
+		m |= iprange_ipv6_sub(&iph->daddr, &info->dst_max.in6) > 0;
+		m ^= info->flags & IPRANGE_DST_INV;
+		if (m)
+			return false;
+	}
+	return true;
+}
+
+static struct xt_match iprange_mt_reg[] __read_mostly = {
+	{
+		.name      = "iprange",
+		.revision  = 0,
+		.family    = AF_INET,
+		.match     = iprange_mt_v0,
+		.matchsize = sizeof(struct ipt_iprange_info),
+		.me        = THIS_MODULE,
+	},
+	{
+		.name      = "iprange",
+		.revision  = 1,
+		.family    = AF_INET6,
+		.match     = iprange_mt4,
+		.matchsize = sizeof(struct xt_iprange_mtinfo),
+		.me        = THIS_MODULE,
+	},
+	{
+		.name      = "iprange",
+		.revision  = 1,
+		.family    = AF_INET6,
+		.match     = iprange_mt6,
+		.matchsize = sizeof(struct xt_iprange_mtinfo),
+		.me        = THIS_MODULE,
+	},
+};
+
+static int __init iprange_mt_init(void)
+{
+	return xt_register_matches(iprange_mt_reg, ARRAY_SIZE(iprange_mt_reg));
+}
+
+static void __exit iprange_mt_exit(void)
+{
+	xt_unregister_matches(iprange_mt_reg, ARRAY_SIZE(iprange_mt_reg));
+}
+
+module_init(iprange_mt_init);
+module_exit(iprange_mt_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>, Jan Engelhardt <jengelh@computergmbh.de>");
+MODULE_DESCRIPTION("Xtables: arbitrary IPv4 range matching");