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-rw-r--r--package/openswan/linux-2.6.21.5-openswan-2.4.8.kernel-2.6-natt.patch126
1 files changed, 126 insertions, 0 deletions
diff --git a/package/openswan/linux-2.6.21.5-openswan-2.4.8.kernel-2.6-natt.patch b/package/openswan/linux-2.6.21.5-openswan-2.4.8.kernel-2.6-natt.patch
new file mode 100644
index 000000000..2db521a2e
--- /dev/null
+++ b/package/openswan/linux-2.6.21.5-openswan-2.4.8.kernel-2.6-natt.patch
@@ -0,0 +1,126 @@
+diff -rduNp linux-2.6.21.5.orig/include/net/xfrmudp.h linux-2.6.21.5/include/net/xfrmudp.h
+--- linux-2.6.21.5.orig/include/net/xfrmudp.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.5/include/net/xfrmudp.h 2007-06-21 10:53:38.000000000 +0200
+@@ -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);
+diff -rduNp linux-2.6.21.5.orig/net/ipv4/Kconfig linux-2.6.21.5/net/ipv4/Kconfig
+--- linux-2.6.21.5.orig/net/ipv4/Kconfig 2007-06-11 20:37:06.000000000 +0200
++++ linux-2.6.21.5/net/ipv4/Kconfig 2007-06-21 10:53:38.000000000 +0200
+@@ -349,6 +349,12 @@ config SYN_COOKIES
+ be taken as absolute truth.
+
+ SYN cookies may prevent correct error reporting on clients when the
++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.
++
+ server is really overloaded. If this happens frequently better turn
+ them off.
+
+diff -rduNp linux-2.6.21.5.orig/net/ipv4/udp.c linux-2.6.21.5/net/ipv4/udp.c
+--- linux-2.6.21.5.orig/net/ipv4/udp.c 2007-06-11 20:37:06.000000000 +0200
++++ linux-2.6.21.5/net/ipv4/udp.c 2007-06-21 10:56:18.000000000 +0200
+@@ -108,6 +108,7 @@
+ */
+
+ DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
++#include <net/xfrmudp.h>
+
+ struct hlist_head udp_hash[UDP_HTABLE_SIZE];
+ DEFINE_RWLOCK(udp_hash_lock);
+@@ -915,6 +916,44 @@ int udp_disconnect(struct sock *sk, int
+ return 0;
+ }
+
++#if defined(CONFIG_XFRM) || defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++
++/* if XFRM isn't a module, then register it directly. */
++#if !defined(CONFIG_XFRM_MODULE)
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = xfrm4_rcv_encap;
++#else
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = NULL;
++#endif
++
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func;
++
++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 || defined(CONFIG_IPSEC_NAT_TRAVERSAL)*/
++
++
+ /* return:
+ * 1 if the the UDP system should process it
+ * 0 if we should drop this packet
+@@ -922,9 +961,9 @@ int udp_disconnect(struct sock *sk, int
+ */
+ 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;
+ struct iphdr *iph;
+@@ -1052,9 +1091,14 @@ int udp_queue_rcv_skb(struct sock * sk,
+ }
+ 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 */
+ }
+@@ -1733,3 +1777,9 @@ EXPORT_SYMBOL(udp_poll);
+ 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
++