1 files changed, 0 insertions, 427 deletions

diff --git a/net/ipv4/ipvs/ip_vs_proto_udp.c b/net/ipv4/ipvs/ip_vs_proto_udp.c
deleted file mode 100644
index 8ae5f2e0aef..00000000000
--- a/net/ipv4/ipvs/ip_vs_proto_udp.c
+++ /dev/null
@@ -1,427 +0,0 @@
-/*
- * ip_vs_proto_udp.c:	UDP load balancing support for IPVS
- *
- * Version:     $Id: ip_vs_proto_udp.c,v 1.3 2002/11/30 01:50:35 wensong Exp $
- *
- * Authors:     Wensong Zhang <wensong@linuxvirtualserver.org>
- *              Julian Anastasov <ja@ssi.bg>
- *
- *              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.
- *
- * Changes:
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-static struct ip_vs_conn *
-udp_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;
-	__u16 _ports[2], *pptr;
-
-	pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
-	if (pptr == NULL)
-		return NULL;
-
-	if (likely(!inverse)) {
-		cp = ip_vs_conn_in_get(iph->protocol,
-				       iph->saddr, pptr[0],
-				       iph->daddr, pptr[1]);
-	} else {
-		cp = ip_vs_conn_in_get(iph->protocol,
-				       iph->daddr, pptr[1],
-				       iph->saddr, pptr[0]);
-	}
-
-	return cp;
-}
-
-
-static struct ip_vs_conn *
-udp_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;
-	__u16 _ports[2], *pptr;
-
-	pptr = skb_header_pointer(skb, skb->nh.iph->ihl*4,
-				  sizeof(_ports), _ports);
-	if (pptr == NULL)
-		return NULL;
-
-	if (likely(!inverse)) {
-		cp = ip_vs_conn_out_get(iph->protocol,
-					iph->saddr, pptr[0],
-					iph->daddr, pptr[1]);
-	} else {
-		cp = ip_vs_conn_out_get(iph->protocol,
-					iph->daddr, pptr[1],
-					iph->saddr, pptr[0]);
-	}
-
-	return cp;
-}
-
-
-static int
-udp_conn_schedule(struct sk_buff *skb, struct ip_vs_protocol *pp,
-		  int *verdict, struct ip_vs_conn **cpp)
-{
-	struct ip_vs_service *svc;
-	struct udphdr _udph, *uh;
-
-	uh = skb_header_pointer(skb, skb->nh.iph->ihl*4,
-				sizeof(_udph), &_udph);
-	if (uh == NULL) {
-		*verdict = NF_DROP;
-		return 0;
-	}
-
-	if ((svc = ip_vs_service_get(skb->nfmark, skb->nh.iph->protocol,
-				     skb->nh.iph->daddr, uh->dest))) {
-		if (ip_vs_todrop()) {
-			/*
-			 * It seems that we are very loaded.
-			 * We have to drop this packet :(
-			 */
-			ip_vs_service_put(svc);
-			*verdict = NF_DROP;
-			return 0;
-		}
-
-		/*
-		 * Let the virtual server select a real server for the
-		 * incoming connection, and create a connection entry.
-		 */
-		*cpp = ip_vs_schedule(svc, skb);
-		if (!*cpp) {
-			*verdict = ip_vs_leave(svc, skb, pp);
-			return 0;
-		}
-		ip_vs_service_put(svc);
-	}
-	return 1;
-}
-
-
-static inline void
-udp_fast_csum_update(struct udphdr *uhdr, u32 oldip, u32 newip,
-		     u16 oldport, u16 newport)
-{
-	uhdr->check =
-		ip_vs_check_diff(~oldip, newip,
-				 ip_vs_check_diff(oldport ^ 0xFFFF,
-						  newport, uhdr->check));
-	if (!uhdr->check)
-		uhdr->check = 0xFFFF;
-}
-
-static int
-udp_snat_handler(struct sk_buff **pskb,
-		 struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
-{
-	struct udphdr *udph;
-	unsigned int udphoff = (*pskb)->nh.iph->ihl * 4;
-
-	/* csum_check requires unshared skb */
-	if (!ip_vs_make_skb_writable(pskb, udphoff+sizeof(*udph)))
-		return 0;
-
-	if (unlikely(cp->app != NULL)) {
-		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(*pskb, pp))
-			return 0;
-
-		/*
-		 *	Call application helper if needed
-		 */
-		if (!ip_vs_app_pkt_out(cp, pskb))
-			return 0;
-	}
-
-	udph = (void *)(*pskb)->nh.iph + udphoff;
-	udph->source = cp->vport;
-
-	/*
-	 *	Adjust UDP checksums
-	 */
-	if (!cp->app && (udph->check != 0)) {
-		/* Only port and addr are changed, do fast csum update */
-		udp_fast_csum_update(udph, cp->daddr, cp->vaddr,
-				     cp->dport, cp->vport);
-		if ((*pskb)->ip_summed == CHECKSUM_HW)
-			(*pskb)->ip_summed = CHECKSUM_NONE;
-	} else {
-		/* full checksum calculation */
-		udph->check = 0;
-		(*pskb)->csum = skb_checksum(*pskb, udphoff,
-					     (*pskb)->len - udphoff, 0);
-		udph->check = csum_tcpudp_magic(cp->vaddr, cp->caddr,
-						(*pskb)->len - udphoff,
-						cp->protocol,
-						(*pskb)->csum);
-		if (udph->check == 0)
-			udph->check = 0xFFFF;
-		IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
-			  pp->name, udph->check,
-			  (char*)&(udph->check) - (char*)udph);
-	}
-	return 1;
-}
-
-
-static int
-udp_dnat_handler(struct sk_buff **pskb,
-		 struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
-{
-	struct udphdr *udph;
-	unsigned int udphoff = (*pskb)->nh.iph->ihl * 4;
-
-	/* csum_check requires unshared skb */
-	if (!ip_vs_make_skb_writable(pskb, udphoff+sizeof(*udph)))
-		return 0;
-
-	if (unlikely(cp->app != NULL)) {
-		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(*pskb, pp))
-			return 0;
-
-		/*
-		 *	Attempt ip_vs_app call.
-		 *	It will fix ip_vs_conn
-		 */
-		if (!ip_vs_app_pkt_in(cp, pskb))
-			return 0;
-	}
-
-	udph = (void *)(*pskb)->nh.iph + udphoff;
-	udph->dest = cp->dport;
-
-	/*
-	 *	Adjust UDP checksums
-	 */
-	if (!cp->app && (udph->check != 0)) {
-		/* Only port and addr are changed, do fast csum update */
-		udp_fast_csum_update(udph, cp->vaddr, cp->daddr,
-				     cp->vport, cp->dport);
-		if ((*pskb)->ip_summed == CHECKSUM_HW)
-			(*pskb)->ip_summed = CHECKSUM_NONE;
-	} else {
-		/* full checksum calculation */
-		udph->check = 0;
-		(*pskb)->csum = skb_checksum(*pskb, udphoff,
-					     (*pskb)->len - udphoff, 0);
-		udph->check = csum_tcpudp_magic(cp->caddr, cp->daddr,
-						(*pskb)->len - udphoff,
-						cp->protocol,
-						(*pskb)->csum);
-		if (udph->check == 0)
-			udph->check = 0xFFFF;
-		(*pskb)->ip_summed = CHECKSUM_UNNECESSARY;
-	}
-	return 1;
-}
-
-
-static int
-udp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
-{
-	struct udphdr _udph, *uh;
-	unsigned int udphoff = skb->nh.iph->ihl*4;
-
-	uh = skb_header_pointer(skb, udphoff, sizeof(_udph), &_udph);
-	if (uh == NULL)
-		return 0;
-
-	if (uh->check != 0) {
-		switch (skb->ip_summed) {
-		case CHECKSUM_NONE:
-			skb->csum = skb_checksum(skb, udphoff,
-						 skb->len - udphoff, 0);
-		case CHECKSUM_HW:
-			if (csum_tcpudp_magic(skb->nh.iph->saddr,
-					      skb->nh.iph->daddr,
-					      skb->len - udphoff,
-					      skb->nh.iph->protocol,
-					      skb->csum)) {
-				IP_VS_DBG_RL_PKT(0, pp, skb, 0,
-						 "Failed checksum for");
-				return 0;
-			}
-			break;
-		default:
-			/* CHECKSUM_UNNECESSARY */
-			break;
-		}
-	}
-	return 1;
-}
-
-
-/*
- *	Note: the caller guarantees that only one of register_app,
- *	unregister_app or app_conn_bind is called each time.
- */
-
-#define	UDP_APP_TAB_BITS	4
-#define	UDP_APP_TAB_SIZE	(1 << UDP_APP_TAB_BITS)
-#define	UDP_APP_TAB_MASK	(UDP_APP_TAB_SIZE - 1)
-
-static struct list_head udp_apps[UDP_APP_TAB_SIZE];
-static DEFINE_SPINLOCK(udp_app_lock);
-
-static inline __u16 udp_app_hashkey(__u16 port)
-{
-	return ((port >> UDP_APP_TAB_BITS) ^ port) & UDP_APP_TAB_MASK;
-}
-
-
-static int udp_register_app(struct ip_vs_app *inc)
-{
-	struct ip_vs_app *i;
-	__u16 hash, port = inc->port;
-	int ret = 0;
-
-	hash = udp_app_hashkey(port);
-
-
-	spin_lock_bh(&udp_app_lock);
-	list_for_each_entry(i, &udp_apps[hash], p_list) {
-		if (i->port == port) {
-			ret = -EEXIST;
-			goto out;
-		}
-	}
-	list_add(&inc->p_list, &udp_apps[hash]);
-	atomic_inc(&ip_vs_protocol_udp.appcnt);
-
-  out:
-	spin_unlock_bh(&udp_app_lock);
-	return ret;
-}
-
-
-static void
-udp_unregister_app(struct ip_vs_app *inc)
-{
-	spin_lock_bh(&udp_app_lock);
-	atomic_dec(&ip_vs_protocol_udp.appcnt);
-	list_del(&inc->p_list);
-	spin_unlock_bh(&udp_app_lock);
-}
-
-
-static int udp_app_conn_bind(struct ip_vs_conn *cp)
-{
-	int hash;
-	struct ip_vs_app *inc;
-	int result = 0;
-
-	/* Default binding: bind app only for NAT */
-	if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
-		return 0;
-
-	/* Lookup application incarnations and bind the right one */
-	hash = udp_app_hashkey(cp->vport);
-
-	spin_lock(&udp_app_lock);
-	list_for_each_entry(inc, &udp_apps[hash], p_list) {
-		if (inc->port == cp->vport) {
-			if (unlikely(!ip_vs_app_inc_get(inc)))
-				break;
-			spin_unlock(&udp_app_lock);
-
-			IP_VS_DBG(9, "%s: Binding conn %u.%u.%u.%u:%u->"
-				  "%u.%u.%u.%u:%u to app %s on port %u\n",
-				  __FUNCTION__,
-				  NIPQUAD(cp->caddr), ntohs(cp->cport),
-				  NIPQUAD(cp->vaddr), ntohs(cp->vport),
-				  inc->name, ntohs(inc->port));
-			cp->app = inc;
-			if (inc->init_conn)
-				result = inc->init_conn(inc, cp);
-			goto out;
-		}
-	}
-	spin_unlock(&udp_app_lock);
-
-  out:
-	return result;
-}
-
-
-static int udp_timeouts[IP_VS_UDP_S_LAST+1] = {
-	[IP_VS_UDP_S_NORMAL]		=	5*60*HZ,
-	[IP_VS_UDP_S_LAST]		=	2*HZ,
-};
-
-static char * udp_state_name_table[IP_VS_UDP_S_LAST+1] = {
-	[IP_VS_UDP_S_NORMAL]		=	"UDP",
-	[IP_VS_UDP_S_LAST]		=	"BUG!",
-};
-
-
-static int
-udp_set_state_timeout(struct ip_vs_protocol *pp, char *sname, int to)
-{
-	return ip_vs_set_state_timeout(pp->timeout_table, IP_VS_UDP_S_LAST,
-				       udp_state_name_table, sname, to);
-}
-
-static const char * udp_state_name(int state)
-{
-	if (state >= IP_VS_UDP_S_LAST)
-		return "ERR!";
-	return udp_state_name_table[state] ? udp_state_name_table[state] : "?";
-}
-
-static int
-udp_state_transition(struct ip_vs_conn *cp, int direction,
-		     const struct sk_buff *skb,
-		     struct ip_vs_protocol *pp)
-{
-	cp->timeout = pp->timeout_table[IP_VS_UDP_S_NORMAL];
-	return 1;
-}
-
-static void udp_init(struct ip_vs_protocol *pp)
-{
-	IP_VS_INIT_HASH_TABLE(udp_apps);
-	pp->timeout_table = udp_timeouts;
-}
-
-static void udp_exit(struct ip_vs_protocol *pp)
-{
-}
-
-
-struct ip_vs_protocol ip_vs_protocol_udp = {
-	.name =			"UDP",
-	.protocol =		IPPROTO_UDP,
-	.dont_defrag =		0,
-	.init =			udp_init,
-	.exit =			udp_exit,
-	.conn_schedule =	udp_conn_schedule,
-	.conn_in_get =		udp_conn_in_get,
-	.conn_out_get =		udp_conn_out_get,
-	.snat_handler =		udp_snat_handler,
-	.dnat_handler =		udp_dnat_handler,
-	.csum_check =		udp_csum_check,
-	.state_transition =	udp_state_transition,
-	.state_name =		udp_state_name,
-	.register_app =		udp_register_app,
-	.unregister_app =	udp_unregister_app,
-	.app_conn_bind =	udp_app_conn_bind,
-	.debug_packet =		ip_vs_tcpudp_debug_packet,
-	.timeout_change =	NULL,
-	.set_state_timeout =	udp_set_state_timeout,
-};