mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 10:39:04 +00:00
167 lines
4.6 KiB
Diff
167 lines
4.6 KiB
Diff
--- /dev/null
|
|
+++ b/include/net/xfrmudp.h
|
|
@@ -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);
|
|
--- a/net/ipv4/Kconfig
|
|
+++ b/net/ipv4/Kconfig
|
|
@@ -266,6 +266,12 @@ config NET_IPGRE_BROADCAST
|
|
Network), but can be distributed all over the Internet. If you want
|
|
to do that, say Y here and to "IP multicast routing" below.
|
|
|
|
+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_MROUTE
|
|
bool "IP: multicast routing"
|
|
depends on IP_MULTICAST
|
|
--- a/net/ipv4/udp.c
|
|
+++ b/net/ipv4/udp.c
|
|
@@ -101,12 +101,15 @@
|
|
#include <net/route.h>
|
|
#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];
|
|
@@ -915,6 +918,42 @@ 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 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
|
|
@@ -922,7 +961,7 @@ 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
|
|
struct udp_sock *up = udp_sk(sk);
|
|
@@ -937,11 +976,11 @@ static int udp_encap_rcv(struct sock * s
|
|
/* 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. */
|
|
@@ -964,7 +1003,7 @@ static int udp_encap_rcv(struct sock * s
|
|
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. */
|
|
@@ -977,7 +1016,7 @@ static int udp_encap_rcv(struct sock * s
|
|
len = sizeof(struct udphdr) + 2 * sizeof(u32);
|
|
} else
|
|
/* Must be an IKE packet.. pass it through */
|
|
- return 1;
|
|
+ return 5;
|
|
break;
|
|
}
|
|
|
|
@@ -988,6 +1027,8 @@ static int udp_encap_rcv(struct sock * s
|
|
*/
|
|
if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
|
|
return 0;
|
|
+ if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
|
|
+ return 0;
|
|
|
|
/* Now we can update and verify the packet length... */
|
|
iph = skb->nh.iph;
|
|
@@ -1051,9 +1092,13 @@ int udp_queue_rcv_skb(struct sock * sk,
|
|
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);
|
|
+ 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 +1778,9 @@ 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
|
|
+
|