127 lines
3.9 KiB
Diff
127 lines
3.9 KiB
Diff
diff -rduNp linux-2.6.21.5.orig/include/net/xfrmudp.h linux-2.6.21.5/include/net/xfrmudp.h
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--- linux-2.6.21.5.orig/include/net/xfrmudp.h 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.21.5/include/net/xfrmudp.h 2007-06-21 10:53:38.000000000 +0200
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@@ -0,0 +1,10 @@
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+/*
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+ * pointer to function for type that xfrm4_input wants, to permit
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+ * decoupling of XFRM from udp.c
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+ */
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+#define HAVE_XFRM4_UDP_REGISTER
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+
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+typedef int (*xfrm4_rcv_encap_t)(struct sk_buff *skb, __u16 encap_type);
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+extern int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
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+ , xfrm4_rcv_encap_t *oldfunc);
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+extern int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func);
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diff -rduNp linux-2.6.21.5.orig/net/ipv4/Kconfig linux-2.6.21.5/net/ipv4/Kconfig
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--- linux-2.6.21.5.orig/net/ipv4/Kconfig 2007-06-11 20:37:06.000000000 +0200
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+++ linux-2.6.21.5/net/ipv4/Kconfig 2007-06-21 10:53:38.000000000 +0200
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@@ -349,6 +349,12 @@ config SYN_COOKIES
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be taken as absolute truth.
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SYN cookies may prevent correct error reporting on clients when the
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+config IPSEC_NAT_TRAVERSAL
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+ bool "IPSEC NAT-Traversal (KLIPS compatible)"
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+ depends on INET
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+ ---help---
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+ Includes support for RFC3947/RFC3948 NAT-Traversal of ESP over UDP.
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+
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server is really overloaded. If this happens frequently better turn
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them off.
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diff -rduNp linux-2.6.21.5.orig/net/ipv4/udp.c linux-2.6.21.5/net/ipv4/udp.c
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--- linux-2.6.21.5.orig/net/ipv4/udp.c 2007-06-11 20:37:06.000000000 +0200
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+++ linux-2.6.21.5/net/ipv4/udp.c 2007-06-21 10:56:18.000000000 +0200
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@@ -108,6 +108,7 @@
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*/
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DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
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+#include <net/xfrmudp.h>
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struct hlist_head udp_hash[UDP_HTABLE_SIZE];
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DEFINE_RWLOCK(udp_hash_lock);
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@@ -915,6 +916,44 @@ int udp_disconnect(struct sock *sk, int
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return 0;
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}
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+#if defined(CONFIG_XFRM) || defined(CONFIG_IPSEC_NAT_TRAVERSAL)
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+
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+/* if XFRM isn't a module, then register it directly. */
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+#if !defined(CONFIG_XFRM_MODULE)
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+static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = xfrm4_rcv_encap;
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+#else
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+static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = NULL;
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+#endif
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+
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+static xfrm4_rcv_encap_t xfrm4_rcv_encap_func;
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+
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+int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
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+ , xfrm4_rcv_encap_t *oldfunc)
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+{
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+ if(oldfunc != NULL) {
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+ *oldfunc = xfrm4_rcv_encap_func;
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+ }
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+
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+#if 0
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+ if(xfrm4_rcv_encap_func != NULL)
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+ return -1;
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+#endif
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+
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+ xfrm4_rcv_encap_func = func;
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+ return 0;
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+}
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+
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+int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func)
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+{
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+ if(xfrm4_rcv_encap_func != func)
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+ return -1;
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+
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+ xfrm4_rcv_encap_func = NULL;
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+ return 0;
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+}
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+#endif /* CONFIG_XFRM || defined(CONFIG_IPSEC_NAT_TRAVERSAL)*/
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+
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+
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/* return:
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* 1 if the the UDP system should process it
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* 0 if we should drop this packet
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@@ -922,9 +961,9 @@ int udp_disconnect(struct sock *sk, int
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*/
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static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb)
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{
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-#ifndef CONFIG_XFRM
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+#if !defined(CONFIG_XFRM) && !defined(CONFIG_IPSEC_NAT_TRAVERSAL)
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return 1;
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-#else
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+#else /* either CONFIG_XFRM or CONFIG_IPSEC_NAT_TRAVERSAL */
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struct udp_sock *up = udp_sk(sk);
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struct udphdr *uh;
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struct iphdr *iph;
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@@ -1052,9 +1091,14 @@ int udp_queue_rcv_skb(struct sock * sk,
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}
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if (ret < 0) {
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/* process the ESP packet */
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- ret = xfrm4_rcv_encap(skb, up->encap_type);
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- UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
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- return -ret;
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+ if (xfrm4_rcv_encap_func != NULL) {
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+ ret = (*xfrm4_rcv_encap_func)(skb, up->encap_type);
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+ UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
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+ } else {
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+ UDP_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
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+ ret = 1;
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+ }
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+ return ret;
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}
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/* FALLTHROUGH -- it's a UDP Packet */
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}
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@@ -1733,3 +1777,9 @@ EXPORT_SYMBOL(udp_poll);
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EXPORT_SYMBOL(udp_proc_register);
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EXPORT_SYMBOL(udp_proc_unregister);
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#endif
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+
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+#if defined(CONFIG_IPSEC_NAT_TRAVERSAL)
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+EXPORT_SYMBOL(udp4_register_esp_rcvencap);
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+EXPORT_SYMBOL(udp4_unregister_esp_rcvencap);
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+#endif
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+
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