mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-15 21:30:43 +00:00
72cb6962a9
This patch adds xfrm_init_state which is simply a wrapper that calls xfrm_get_type and subsequently x->type->init_state. It also gets rid of the unused args argument. Abstracting it out allows us to add common initialisation code, e.g., to set family-specific flags. The add_time setting in xfrm_user.c was deleted because it's already set by xfrm_state_alloc. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: James Morris <jmorris@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
145 lines
2.8 KiB
C
145 lines
2.8 KiB
C
/* xfrm4_tunnel.c: Generic IP tunnel transformer.
|
|
*
|
|
* Copyright (C) 2003 David S. Miller (davem@redhat.com)
|
|
*/
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <linux/module.h>
|
|
#include <net/xfrm.h>
|
|
#include <net/ip.h>
|
|
#include <net/protocol.h>
|
|
|
|
static int ipip_output(struct xfrm_state *x, struct sk_buff *skb)
|
|
{
|
|
struct iphdr *iph;
|
|
|
|
iph = skb->nh.iph;
|
|
iph->tot_len = htons(skb->len);
|
|
ip_send_check(iph);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipip_xfrm_rcv(struct xfrm_state *x, struct xfrm_decap_state *decap, struct sk_buff *skb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct xfrm_tunnel *ipip_handler;
|
|
static DECLARE_MUTEX(xfrm4_tunnel_sem);
|
|
|
|
int xfrm4_tunnel_register(struct xfrm_tunnel *handler)
|
|
{
|
|
int ret;
|
|
|
|
down(&xfrm4_tunnel_sem);
|
|
ret = 0;
|
|
if (ipip_handler != NULL)
|
|
ret = -EINVAL;
|
|
if (!ret)
|
|
ipip_handler = handler;
|
|
up(&xfrm4_tunnel_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(xfrm4_tunnel_register);
|
|
|
|
int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler)
|
|
{
|
|
int ret;
|
|
|
|
down(&xfrm4_tunnel_sem);
|
|
ret = 0;
|
|
if (ipip_handler != handler)
|
|
ret = -EINVAL;
|
|
if (!ret)
|
|
ipip_handler = NULL;
|
|
up(&xfrm4_tunnel_sem);
|
|
|
|
synchronize_net();
|
|
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(xfrm4_tunnel_deregister);
|
|
|
|
static int ipip_rcv(struct sk_buff *skb)
|
|
{
|
|
struct xfrm_tunnel *handler = ipip_handler;
|
|
|
|
/* Tunnel devices take precedence. */
|
|
if (handler && handler->handler(skb) == 0)
|
|
return 0;
|
|
|
|
return xfrm4_rcv(skb);
|
|
}
|
|
|
|
static void ipip_err(struct sk_buff *skb, u32 info)
|
|
{
|
|
struct xfrm_tunnel *handler = ipip_handler;
|
|
u32 arg = info;
|
|
|
|
if (handler)
|
|
handler->err_handler(skb, &arg);
|
|
}
|
|
|
|
static int ipip_init_state(struct xfrm_state *x)
|
|
{
|
|
if (!x->props.mode)
|
|
return -EINVAL;
|
|
|
|
if (x->encap)
|
|
return -EINVAL;
|
|
|
|
x->props.header_len = sizeof(struct iphdr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipip_destroy(struct xfrm_state *x)
|
|
{
|
|
}
|
|
|
|
static struct xfrm_type ipip_type = {
|
|
.description = "IPIP",
|
|
.owner = THIS_MODULE,
|
|
.proto = IPPROTO_IPIP,
|
|
.init_state = ipip_init_state,
|
|
.destructor = ipip_destroy,
|
|
.input = ipip_xfrm_rcv,
|
|
.output = ipip_output
|
|
};
|
|
|
|
static struct net_protocol ipip_protocol = {
|
|
.handler = ipip_rcv,
|
|
.err_handler = ipip_err,
|
|
.no_policy = 1,
|
|
};
|
|
|
|
static int __init ipip_init(void)
|
|
{
|
|
if (xfrm_register_type(&ipip_type, AF_INET) < 0) {
|
|
printk(KERN_INFO "ipip init: can't add xfrm type\n");
|
|
return -EAGAIN;
|
|
}
|
|
if (inet_add_protocol(&ipip_protocol, IPPROTO_IPIP) < 0) {
|
|
printk(KERN_INFO "ipip init: can't add protocol\n");
|
|
xfrm_unregister_type(&ipip_type, AF_INET);
|
|
return -EAGAIN;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ipip_fini(void)
|
|
{
|
|
if (inet_del_protocol(&ipip_protocol, IPPROTO_IPIP) < 0)
|
|
printk(KERN_INFO "ipip close: can't remove protocol\n");
|
|
if (xfrm_unregister_type(&ipip_type, AF_INET) < 0)
|
|
printk(KERN_INFO "ipip close: can't remove xfrm type\n");
|
|
}
|
|
|
|
module_init(ipip_init);
|
|
module_exit(ipip_fini);
|
|
MODULE_LICENSE("GPL");
|