Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 137 insertions, 0 deletions

diff --git a/net/netfilter/xt_iprange.c b/net/netfilter/xt_iprange.c
new file mode 100644
index 000000000..0c9e014e3
--- /dev/null
+++ b/net/netfilter/xt_iprange.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *	xt_iprange - Netfilter module to match IP address ranges
+ *
+ *	(C) 2003 Jozsef Kadlecsik <kadlec@netfilter.org>
+ *	(C) CC Computer Consultants GmbH, 2008
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#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/xt_iprange.h>
+
+static bool
+iprange_mt4(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_iprange_mtinfo *info = par->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 %pI4 NOT in range %s%pI4-%pI4\n",
+			         &iph->saddr,
+			         (info->flags & IPRANGE_SRC_INV) ? "(INV) " : "",
+			         &info->src_min.ip,
+			         &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 %pI4 NOT in range %s%pI4-%pI4\n",
+			         &iph->daddr,
+			         (info->flags & IPRANGE_DST_INV) ? "(INV) " : "",
+			         &info->dst_min.ip,
+			         &info->dst_max.ip);
+			return false;
+		}
+	}
+	return true;
+}
+
+static inline int
+iprange_ipv6_lt(const struct in6_addr *a, const struct in6_addr *b)
+{
+	unsigned int i;
+
+	for (i = 0; i < 4; ++i) {
+		if (a->s6_addr32[i] != b->s6_addr32[i])
+			return ntohl(a->s6_addr32[i]) < ntohl(b->s6_addr32[i]);
+	}
+
+	return 0;
+}
+
+static bool
+iprange_mt6(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_iprange_mtinfo *info = par->matchinfo;
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
+	bool m;
+
+	if (info->flags & IPRANGE_SRC) {
+		m  = iprange_ipv6_lt(&iph->saddr, &info->src_min.in6);
+		m |= iprange_ipv6_lt(&info->src_max.in6, &iph->saddr);
+		m ^= !!(info->flags & IPRANGE_SRC_INV);
+		if (m) {
+			pr_debug("src IP %pI6 NOT in range %s%pI6-%pI6\n",
+				 &iph->saddr,
+				 (info->flags & IPRANGE_SRC_INV) ? "(INV) " : "",
+				 &info->src_min.in6,
+				 &info->src_max.in6);
+			return false;
+		}
+	}
+	if (info->flags & IPRANGE_DST) {
+		m  = iprange_ipv6_lt(&iph->daddr, &info->dst_min.in6);
+		m |= iprange_ipv6_lt(&info->dst_max.in6, &iph->daddr);
+		m ^= !!(info->flags & IPRANGE_DST_INV);
+		if (m) {
+			pr_debug("dst IP %pI6 NOT in range %s%pI6-%pI6\n",
+				 &iph->daddr,
+				 (info->flags & IPRANGE_DST_INV) ? "(INV) " : "",
+				 &info->dst_min.in6,
+				 &info->dst_max.in6);
+			return false;
+		}
+	}
+	return true;
+}
+
+static struct xt_match iprange_mt_reg[] __read_mostly = {
+	{
+		.name      = "iprange",
+		.revision  = 1,
+		.family    = NFPROTO_IPV4,
+		.match     = iprange_mt4,
+		.matchsize = sizeof(struct xt_iprange_mtinfo),
+		.me        = THIS_MODULE,
+	},
+	{
+		.name      = "iprange",
+		.revision  = 1,
+		.family    = NFPROTO_IPV6,
+		.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@netfilter.org>");
+MODULE_AUTHOR("Jan Engelhardt <jengelh@medozas.de>");
+MODULE_DESCRIPTION("Xtables: arbitrary IPv4 range matching");
+MODULE_ALIAS("ipt_iprange");
+MODULE_ALIAS("ip6t_iprange");