IPVS: Move IPVS to net/netfilter/ipvs

Since IPVS now has partial IPv6 support, this patch moves IPVS from
net/ipv4/ipvs to net/netfilter/ipvs. It's a result of:

$ git mv net/ipv4/ipvs net/netfilter

and adapting the relevant Kconfigs/Makefiles to the new path.

Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 235 insertions, 0 deletions

diff --git a/net/netfilter/ipvs/ip_vs_proto_ah_esp.c b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
new file mode 100644
index 000000000000..80ab0c8e5b4a
--- /dev/null
+++ b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
@@ -0,0 +1,235 @@
+/*
+ * ip_vs_proto_ah_esp.c:	AH/ESP IPSec load balancing support for IPVS
+ *
+ * Authors:	Julian Anastasov <ja@ssi.bg>, February 2002
+ *		Wensong Zhang <wensong@linuxvirtualserver.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/in.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+
+#include <net/ip_vs.h>
+
+
+/* TODO:
+
+struct isakmp_hdr {
+	__u8		icookie[8];
+	__u8		rcookie[8];
+	__u8		np;
+	__u8		version;
+	__u8		xchgtype;
+	__u8		flags;
+	__u32		msgid;
+	__u32		length;
+};
+
+*/
+
+#define PORT_ISAKMP	500
+
+
+static struct ip_vs_conn *
+ah_esp_conn_in_get(int af, const struct sk_buff *skb, struct ip_vs_protocol *pp,
+		   const struct ip_vs_iphdr *iph, unsigned int proto_off,
+		   int inverse)
+{
+	struct ip_vs_conn *cp;
+
+	if (likely(!inverse)) {
+		cp = ip_vs_conn_in_get(af, IPPROTO_UDP,
+				       &iph->saddr,
+				       htons(PORT_ISAKMP),
+				       &iph->daddr,
+				       htons(PORT_ISAKMP));
+	} else {
+		cp = ip_vs_conn_in_get(af, IPPROTO_UDP,
+				       &iph->daddr,
+				       htons(PORT_ISAKMP),
+				       &iph->saddr,
+				       htons(PORT_ISAKMP));
+	}
+
+	if (!cp) {
+		/*
+		 * We are not sure if the packet is from our
+		 * service, so our conn_schedule hook should return NF_ACCEPT
+		 */
+		IP_VS_DBG_BUF(12, "Unknown ISAKMP entry for outin packet "
+			      "%s%s %s->%s\n",
+			      inverse ? "ICMP+" : "",
+			      pp->name,
+			      IP_VS_DBG_ADDR(af, &iph->saddr),
+			      IP_VS_DBG_ADDR(af, &iph->daddr));
+	}
+
+	return cp;
+}
+
+
+static struct ip_vs_conn *
+ah_esp_conn_out_get(int af, const struct sk_buff *skb,
+		    struct ip_vs_protocol *pp,
+		    const struct ip_vs_iphdr *iph,
+		    unsigned int proto_off,
+		    int inverse)
+{
+	struct ip_vs_conn *cp;
+
+	if (likely(!inverse)) {
+		cp = ip_vs_conn_out_get(af, IPPROTO_UDP,
+					&iph->saddr,
+					htons(PORT_ISAKMP),
+					&iph->daddr,
+					htons(PORT_ISAKMP));
+	} else {
+		cp = ip_vs_conn_out_get(af, IPPROTO_UDP,
+					&iph->daddr,
+					htons(PORT_ISAKMP),
+					&iph->saddr,
+					htons(PORT_ISAKMP));
+	}
+
+	if (!cp) {
+		IP_VS_DBG_BUF(12, "Unknown ISAKMP entry for inout packet "
+			      "%s%s %s->%s\n",
+			      inverse ? "ICMP+" : "",
+			      pp->name,
+			      IP_VS_DBG_ADDR(af, &iph->saddr),
+			      IP_VS_DBG_ADDR(af, &iph->daddr));
+	}
+
+	return cp;
+}
+
+
+static int
+ah_esp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp,
+		     int *verdict, struct ip_vs_conn **cpp)
+{
+	/*
+	 * AH/ESP is only related traffic. Pass the packet to IP stack.
+	 */
+	*verdict = NF_ACCEPT;
+	return 0;
+}
+
+
+static void
+ah_esp_debug_packet_v4(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+		       int offset, const char *msg)
+{
+	char buf[256];
+	struct iphdr _iph, *ih;
+
+	ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
+	if (ih == NULL)
+		sprintf(buf, "%s TRUNCATED", pp->name);
+	else
+		sprintf(buf, "%s %u.%u.%u.%u->%u.%u.%u.%u",
+			pp->name, NIPQUAD(ih->saddr),
+			NIPQUAD(ih->daddr));
+
+	printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
+}
+
+#ifdef CONFIG_IP_VS_IPV6
+static void
+ah_esp_debug_packet_v6(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+		       int offset, const char *msg)
+{
+	char buf[256];
+	struct ipv6hdr _iph, *ih;
+
+	ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
+	if (ih == NULL)
+		sprintf(buf, "%s TRUNCATED", pp->name);
+	else
+		sprintf(buf, "%s " NIP6_FMT "->" NIP6_FMT,
+			pp->name, NIP6(ih->saddr),
+			NIP6(ih->daddr));
+
+	printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
+}
+#endif
+
+static void
+ah_esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+		    int offset, const char *msg)
+{
+#ifdef CONFIG_IP_VS_IPV6
+	if (skb->protocol == htons(ETH_P_IPV6))
+		ah_esp_debug_packet_v6(pp, skb, offset, msg);
+	else
+#endif
+		ah_esp_debug_packet_v4(pp, skb, offset, msg);
+}
+
+
+static void ah_esp_init(struct ip_vs_protocol *pp)
+{
+	/* nothing to do now */
+}
+
+
+static void ah_esp_exit(struct ip_vs_protocol *pp)
+{
+	/* nothing to do now */
+}
+
+
+#ifdef CONFIG_IP_VS_PROTO_AH
+struct ip_vs_protocol ip_vs_protocol_ah = {
+	.name =			"AH",
+	.protocol =		IPPROTO_AH,
+	.num_states =		1,
+	.dont_defrag =		1,
+	.init =			ah_esp_init,
+	.exit =			ah_esp_exit,
+	.conn_schedule =	ah_esp_conn_schedule,
+	.conn_in_get =		ah_esp_conn_in_get,
+	.conn_out_get =		ah_esp_conn_out_get,
+	.snat_handler =		NULL,
+	.dnat_handler =		NULL,
+	.csum_check =		NULL,
+	.state_transition =	NULL,
+	.register_app =		NULL,
+	.unregister_app =	NULL,
+	.app_conn_bind =	NULL,
+	.debug_packet =		ah_esp_debug_packet,
+	.timeout_change =	NULL,		/* ISAKMP */
+	.set_state_timeout =	NULL,
+};
+#endif
+
+#ifdef CONFIG_IP_VS_PROTO_ESP
+struct ip_vs_protocol ip_vs_protocol_esp = {
+	.name =			"ESP",
+	.protocol =		IPPROTO_ESP,
+	.num_states =		1,
+	.dont_defrag =		1,
+	.init =			ah_esp_init,
+	.exit =			ah_esp_exit,
+	.conn_schedule =	ah_esp_conn_schedule,
+	.conn_in_get =		ah_esp_conn_in_get,
+	.conn_out_get =		ah_esp_conn_out_get,
+	.snat_handler =		NULL,
+	.dnat_handler =		NULL,
+	.csum_check =		NULL,
+	.state_transition =	NULL,
+	.register_app =		NULL,
+	.unregister_app =	NULL,
+	.app_conn_bind =	NULL,
+	.debug_packet =		ah_esp_debug_packet,
+	.timeout_change =	NULL,		/* ISAKMP */
+};
+#endif