- fwd port

1 files changed, 158 insertions, 0 deletions

diff --git a/package/openswan/linux-2.6.20.4-openswan-2.4.7.kernel-2.6-natt.patch b/package/openswan/linux-2.6.20.4-openswan-2.4.7.kernel-2.6-natt.patch
new file mode 100644
index 000000000..923261396
--- /dev/null
+++ b/package/openswan/linux-2.6.20.4-openswan-2.4.7.kernel-2.6-natt.patch
@@ -0,0 +1,158 @@
+packaging/utils/nattpatch 2.6
+--- /dev/null   Tue Mar 11 13:02:56 2003
++++ nat-t/include/net/xfrmudp.h     Mon Feb  9 13:51:03 2004
+@@ -0,0 +1,10 @@
++/*
++ * pointer to function for type that xfrm4_input wants, to permit
++ * decoupling of XFRM from udp.c
++ */
++#define HAVE_XFRM4_UDP_REGISTER
++
++typedef int (*xfrm4_rcv_encap_t)(struct sk_buff *skb, __u16 encap_type);
++extern int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
++				      , xfrm4_rcv_encap_t *oldfunc);
++extern int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func);
+--- /distros/kernel/linux-2.6.11.2/net/ipv4/Kconfig	2005-03-09 03:12:33.000000000 -0500
++++ swan26/net/ipv4/Kconfig	2005-04-04 18:46:13.000000000 -0400
+@@ -351,2 +351,8 @@
+ 
++config IPSEC_NAT_TRAVERSAL
++	bool "IPSEC NAT-Traversal (KLIPS compatible)"
++	depends on INET
++	---help---
++          Includes support for RFC3947/RFC3948 NAT-Traversal of ESP over UDP.
++
+ config IP_TCPDIAG
+--- plain26/net/ipv4/udp.c.orig	2006-01-02 22:21:10.000000000 -0500
++++ plain26/net/ipv4/udp.c	2006-01-10 20:07:21.000000000 -0500
+@@ -108,11 +108,14 @@
+ #include <net/checksum.h>
+ #include <net/xfrm.h>
++#include <net/xfrmudp.h>
+ #include "udp_impl.h"
+ 
+ /*
+  *	Snmp MIB for the UDP layer
+  */
+ 
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func;
++
+ DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
+ 
+ struct hlist_head udp_hash[UDP_HTABLE_SIZE];
+@@ -894,6 +897,42 @@
+ 	sk_common_release(sk);
+ }
+ 
++#if defined(CONFIG_XFRM) || defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++
++/* if XFRM isn't a module, then register it directly. */
++#if 0 && !defined(CONFIG_XFRM_MODULE) && !defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = xfrm4_rcv_encap;
++#else
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = NULL;
++#endif
++
++int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
++			       , xfrm4_rcv_encap_t *oldfunc)
++{
++  if(oldfunc != NULL) {
++    *oldfunc = xfrm4_rcv_encap_func;
++  }
++
++#if 0
++  if(xfrm4_rcv_encap_func != NULL)
++    return -1;
++#endif
++
++  xfrm4_rcv_encap_func = func;
++  return 0;
++}
++
++int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func)
++{
++  if(xfrm4_rcv_encap_func != func)
++    return -1;
++
++  xfrm4_rcv_encap_func = NULL;
++  return 0;
++}
++#endif /* CONFIG_XFRM_MODULE || CONFIG_IPSEC_NAT_TRAVERSAL */
++
++
+ /* return:
+  * 	1  if the the UDP system should process it
+  *	0  if we should drop this packet
+@@ -901,9 +940,9 @@
+  */
+ static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb)
+ {
+-#ifndef CONFIG_XFRM
++#if !defined(CONFIG_XFRM) && !defined(CONFIG_IPSEC_NAT_TRAVERSAL)
+ 	return 1; 
+-#else
++#else /* either CONFIG_XFRM or CONFIG_IPSEC_NAT_TRAVERSAL */
+ 	struct udp_sock *up = udp_sk(sk);
+   	struct udphdr *uh = skb->h.uh;
+ 	struct iphdr *iph;
+@@ -915,11 +954,11 @@
+ 	/* if we're overly short, let UDP handle it */
+ 	len = skb->len - sizeof(struct udphdr);
+ 	if (len <= 0)
+-		return 1;
++		return 2;
+ 
+ 	/* if this is not encapsulated socket, then just return now */
+ 	if (!encap_type)
+-		return 1;
++		return 3;
+ 
+ 	/* If this is a paged skb, make sure we pull up
+ 	 * whatever data we need to look at. */
+@@ -934,7 +973,7 @@
+ 			len = sizeof(struct udphdr);
+ 		} else
+ 			/* Must be an IKE packet.. pass it through */
+-			return 1;
++			return 4;
+ 		break;
+ 	case UDP_ENCAP_ESPINUDP_NON_IKE:
+ 		/* Check if this is a keepalive packet.  If so, eat it. */
+@@ -947,7 +986,7 @@
+ 			len = sizeof(struct udphdr) + 2 * sizeof(u32);
+ 		} else
+ 			/* Must be an IKE packet.. pass it through */
+-			return 1;
++			return 5;
+ 		break;
+ 	}
+ 
+@@ -1021,10 +1060,14 @@
+ 			return 0;
+ 		}
+ 		if (ret < 0) {
+-			/* process the ESP packet */
+-			ret = xfrm4_rcv_encap(skb, up->encap_type);
+-			UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
+-			return -ret;
++ 			if(xfrm4_rcv_encap_func != NULL) {
++ 			  ret = (*xfrm4_rcv_encap_func)(skb, up->encap_type);
++ 			  UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
++ 			} else {
++ 			  UDP_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
++ 			  ret = 1;
++ 			}
++			return ret;
+ 		}
+ 		/* FALLTHROUGH -- it's a UDP Packet */
+ 	}
+@@ -1571,3 +1613,9 @@
+ EXPORT_SYMBOL(udp_proc_register);
+ EXPORT_SYMBOL(udp_proc_unregister);
+ #endif
++
++#if defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++EXPORT_SYMBOL(udp4_register_esp_rcvencap);
++EXPORT_SYMBOL(udp4_unregister_esp_rcvencap);
++#endif
++