IPVS: Rename ip_vs_proto_ah.c to ip_vs_proto_ah_esp.c

ip_vs_proto-objs-y :=

ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_TCP) += ip_vs_proto_tcp.o

ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_UDP) += ip_vs_proto_udp.o

ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_AH_ESP) += ip_vs_proto_ah.o

ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_AH_ESP) += ip_vs_proto_ah_esp.o

ip_vs-objs :=	ip_vs_conn.o ip_vs_core.o ip_vs_ctl.o ip_vs_sched.o	   \

		ip_vs_xmit.o ip_vs_app.o ip_vs_sync.o	   		   \

/*

 * ip_vs_proto_esp.c:	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 *

esp_conn_in_get(const struct sk_buff *skb,

		struct ip_vs_protocol *pp,

		const struct iphdr *iph,

		unsigned int proto_off,

		int inverse)

{

	struct ip_vs_conn *cp;

	if (likely(!inverse)) {

		cp = ip_vs_conn_in_get(IPPROTO_UDP,

				       iph->saddr,

				       htons(PORT_ISAKMP),

				       iph->daddr,

				       htons(PORT_ISAKMP));

	} else {

		cp = ip_vs_conn_in_get(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(12, "Unknown ISAKMP entry for outin packet "

			  "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",

			  inverse ? "ICMP+" : "",

			  pp->name,

			  NIPQUAD(iph->saddr),

			  NIPQUAD(iph->daddr));

	}

	return cp;

}

static struct ip_vs_conn *

esp_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,

		 const struct iphdr *iph, unsigned int proto_off, int inverse)

{

	struct ip_vs_conn *cp;

	if (likely(!inverse)) {

		cp = ip_vs_conn_out_get(IPPROTO_UDP,

					iph->saddr,

					htons(PORT_ISAKMP),

					iph->daddr,

					htons(PORT_ISAKMP));

	} else {

		cp = ip_vs_conn_out_get(IPPROTO_UDP,

					iph->daddr,

					htons(PORT_ISAKMP),

					iph->saddr,

					htons(PORT_ISAKMP));

	}

	if (!cp) {

		IP_VS_DBG(12, "Unknown ISAKMP entry for inout packet "

			  "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",

			  inverse ? "ICMP+" : "",

			  pp->name,

			  NIPQUAD(iph->saddr),

			  NIPQUAD(iph->daddr));

	}

	return cp;

}

static int

esp_conn_schedule(struct sk_buff *skb, struct ip_vs_protocol *pp,

		  int *verdict, struct ip_vs_conn **cpp)

{

	/*

	 * ESP is only related traffic. Pass the packet to IP stack.

	 */

	*verdict = NF_ACCEPT;

	return 0;

}

static void

esp_debug_packet(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);

}

static void esp_init(struct ip_vs_protocol *pp)

{

	/* nothing to do now */

}

static void esp_exit(struct ip_vs_protocol *pp)

{

	/* nothing to do now */

}

struct ip_vs_protocol ip_vs_protocol_esp = {

	.name =			"ESP",

	.protocol =		IPPROTO_ESP,

	.num_states =		1,

	.dont_defrag =		1,

	.init =			esp_init,

	.exit =			esp_exit,

	.conn_schedule =	esp_conn_schedule,

	.conn_in_get =		esp_conn_in_get,

	.conn_out_get =		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 =		esp_debug_packet,

	.timeout_change =	NULL,		/* ISAKMP */

};