e695633e21
This patch removes the decap_state argument from the xfrm input hook. Previously this function allowed the input hook to share state with the post_input hook. The latter has since been removed. The only purpose for it now is to check the encap type. However, it is easier and better to move the encap type check to the generic xfrm_rcv function. This allows us to get rid of the decap state argument altogether. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
/* xfrm4_tunnel.c: Generic IP tunnel transformer.
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*
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* Copyright (C) 2003 David S. Miller (davem@redhat.com)
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*/
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#include <linux/skbuff.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <net/xfrm.h>
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#include <net/ip.h>
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#include <net/protocol.h>
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static int ipip_output(struct xfrm_state *x, struct sk_buff *skb)
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{
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struct iphdr *iph;
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iph = skb->nh.iph;
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iph->tot_len = htons(skb->len);
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ip_send_check(iph);
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return 0;
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}
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static int ipip_xfrm_rcv(struct xfrm_state *x, struct sk_buff *skb)
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{
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return 0;
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}
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static int ipip_init_state(struct xfrm_state *x)
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{
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if (!x->props.mode)
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return -EINVAL;
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if (x->encap)
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return -EINVAL;
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x->props.header_len = sizeof(struct iphdr);
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return 0;
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}
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static void ipip_destroy(struct xfrm_state *x)
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{
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}
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static struct xfrm_type ipip_type = {
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.description = "IPIP",
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.owner = THIS_MODULE,
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.proto = IPPROTO_IPIP,
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.init_state = ipip_init_state,
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.destructor = ipip_destroy,
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.input = ipip_xfrm_rcv,
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.output = ipip_output
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};
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static int xfrm_tunnel_err(struct sk_buff *skb, u32 info)
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{
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return -ENOENT;
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}
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static struct xfrm_tunnel xfrm_tunnel_handler = {
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.handler = xfrm4_rcv,
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.err_handler = xfrm_tunnel_err,
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.priority = 2,
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};
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static int __init ipip_init(void)
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{
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if (xfrm_register_type(&ipip_type, AF_INET) < 0) {
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printk(KERN_INFO "ipip init: can't add xfrm type\n");
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return -EAGAIN;
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}
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if (xfrm4_tunnel_register(&xfrm_tunnel_handler)) {
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printk(KERN_INFO "ipip init: can't add xfrm handler\n");
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xfrm_unregister_type(&ipip_type, AF_INET);
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return -EAGAIN;
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}
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return 0;
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}
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static void __exit ipip_fini(void)
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{
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if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler))
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printk(KERN_INFO "ipip close: can't remove xfrm handler\n");
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if (xfrm_unregister_type(&ipip_type, AF_INET) < 0)
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printk(KERN_INFO "ipip close: can't remove xfrm type\n");
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}
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module_init(ipip_init);
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module_exit(ipip_fini);
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MODULE_LICENSE("GPL");
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