linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / net / ipv6 / xfrm6_tunnel.c

diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index d37768e..8cfc58b 100644 (file)
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -28,9 +28,9 @@
 #include <net/ip.h>
 #include <net/xfrm.h>
 #include <net/ipv6.h>
+#include <net/protocol.h>
 #include <linux/ipv6.h>
 #include <linux/icmpv6.h>
-#include <linux/mutex.h>
 
 #ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG
 # define X6TDEBUG      3
@@ -351,23 +351,76 @@ static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
        return 0;
 }
 
-static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm6_tunnel_input(struct xfrm_state *x, struct xfrm_decap_state *decap, struct sk_buff *skb)
 {
        return 0;
 }
 
-static int xfrm6_tunnel_rcv(struct sk_buff *skb)
+static struct xfrm6_tunnel *xfrm6_tunnel_handler;
+static DECLARE_MUTEX(xfrm6_tunnel_sem);
+
+int xfrm6_tunnel_register(struct xfrm6_tunnel *handler)
 {
+       int ret;
+
+       down(&xfrm6_tunnel_sem);
+       ret = 0;
+       if (xfrm6_tunnel_handler != NULL)
+               ret = -EINVAL;
+       if (!ret)
+               xfrm6_tunnel_handler = handler;
+       up(&xfrm6_tunnel_sem);
+
+       return ret;
+}
+
+EXPORT_SYMBOL(xfrm6_tunnel_register);
+
+int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler)
+{
+       int ret;
+
+       down(&xfrm6_tunnel_sem);
+       ret = 0;
+       if (xfrm6_tunnel_handler != handler)
+               ret = -EINVAL;
+       if (!ret)
+               xfrm6_tunnel_handler = NULL;
+       up(&xfrm6_tunnel_sem);
+
+       synchronize_net();
+
+       return ret;
+}
+
+EXPORT_SYMBOL(xfrm6_tunnel_deregister);
+
+static int xfrm6_tunnel_rcv(struct sk_buff **pskb)
+{
+       struct sk_buff *skb = *pskb;
+       struct xfrm6_tunnel *handler = xfrm6_tunnel_handler;
        struct ipv6hdr *iph = skb->nh.ipv6h;
        u32 spi;
 
+       /* device-like_ip6ip6_handler() */
+       if (handler && handler->handler(pskb) == 0)
+               return 0;
+
        spi = xfrm6_tunnel_spi_lookup((xfrm_address_t *)&iph->saddr);
-       return xfrm6_rcv_spi(skb, spi);
+       return xfrm6_rcv_spi(pskb, spi);
 }
 
-static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
-                           int type, int code, int offset, __u32 info)
+static void xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+                            int type, int code, int offset, __u32 info)
 {
+       struct xfrm6_tunnel *handler = xfrm6_tunnel_handler;
+
+       /* call here first for device-like ip6ip6 err handling */
+       if (handler) {
+               handler->err_handler(skb, opt, type, code, offset, info);
+               return;
+       }
+
        /* xfrm6_tunnel native err handling */
        switch (type) {
        case ICMPV6_DEST_UNREACH: 
@@ -408,8 +461,7 @@ static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
        default:
                break;
        }
-
-       return 0;
+       return;
 }
 
 static int xfrm6_tunnel_init_state(struct xfrm_state *x)
@@ -440,10 +492,10 @@ static struct xfrm_type xfrm6_tunnel_type = {
        .output         = xfrm6_tunnel_output,
 };
 
-static struct xfrm6_tunnel xfrm6_tunnel_handler = {
+static struct inet6_protocol xfrm6_tunnel_protocol = {
        .handler        = xfrm6_tunnel_rcv,
-       .err_handler    = xfrm6_tunnel_err,
-       .priority       = 2,
+       .err_handler    = xfrm6_tunnel_err, 
+       .flags          = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
 static int __init xfrm6_tunnel_init(void)
@@ -455,16 +507,16 @@ static int __init xfrm6_tunnel_init(void)
                           "xfrm6_tunnel init: can't add xfrm type\n");
                return -EAGAIN;
        }
-       if (xfrm6_tunnel_register(&xfrm6_tunnel_handler)) {
+       if (inet6_add_protocol(&xfrm6_tunnel_protocol, IPPROTO_IPV6) < 0) {
                X6TPRINTK1(KERN_ERR
-                          "xfrm6_tunnel init(): can't add handler\n");
+                          "xfrm6_tunnel init(): can't add protocol\n");
                xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
                return -EAGAIN;
        }
        if (xfrm6_tunnel_spi_init() < 0) {
                X6TPRINTK1(KERN_ERR
                           "xfrm6_tunnel init: failed to initialize spi\n");
-               xfrm6_tunnel_deregister(&xfrm6_tunnel_handler);
+               inet6_del_protocol(&xfrm6_tunnel_protocol, IPPROTO_IPV6);
                xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
                return -EAGAIN;
        }
@@ -476,9 +528,9 @@ static void __exit xfrm6_tunnel_fini(void)
        X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
 
        xfrm6_tunnel_spi_fini();
-       if (xfrm6_tunnel_deregister(&xfrm6_tunnel_handler))
+       if (inet6_del_protocol(&xfrm6_tunnel_protocol, IPPROTO_IPV6) < 0)
                X6TPRINTK1(KERN_ERR 
-                          "xfrm6_tunnel close: can't remove handler\n");
+                          "xfrm6_tunnel close: can't remove protocol\n");
        if (xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6) < 0)
                X6TPRINTK1(KERN_ERR
                           "xfrm6_tunnel close: can't remove xfrm type\n");