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Commit 827789cb authored by Steffen Klassert's avatar Steffen Klassert
Browse files

esp4: Use the IPsec protocol multiplexer API 



Switch esp4 to use the new IPsec protocol multiplexer.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
parent 3328715e

net/ipv4/esp4.c

+17 −9
Original line number Diff line number Diff line
@@ -473,7 +473,7 @@ static u32 esp4_get_mtu(struct xfrm_state *x, int mtu) 
		 net_adj) & ~(blksize - 1)) + net_adj - 2;

}



static void esp4_err(struct sk_buff *skb, u32 info)

static int esp4_err(struct sk_buff *skb, u32 info)

{

	struct net *net = dev_net(skb->dev);

	const struct iphdr *iph = (const struct iphdr *)skb->data;
@@ -483,23 +483,25 @@ static void esp4_err(struct sk_buff *skb, u32 info) 
	switch (icmp_hdr(skb)->type) {

	case ICMP_DEST_UNREACH:

		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)

			return;

			return 0;

	case ICMP_REDIRECT:

		break;

	default:

		return;

		return 0;

	}



	x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,

			      esph->spi, IPPROTO_ESP, AF_INET);

	if (!x)

		return;

		return 0;



	if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)

		ipv4_update_pmtu(skb, net, info, 0, 0, IPPROTO_ESP, 0);

	else

		ipv4_redirect(skb, net, 0, 0, IPPROTO_ESP, 0);

	xfrm_state_put(x);



	return 0;

}



static void esp_destroy(struct xfrm_state *x)
@@ -672,6 +674,11 @@ error: 
	return err;

}



static int esp4_rcv_cb(struct sk_buff *skb, int err)

{

	return 0;

}



static const struct xfrm_type esp_type =

{

	.description	= "ESP4",
@@ -685,11 +692,12 @@ static const struct xfrm_type esp_type = 
	.output		= esp_output

};



static const struct net_protocol esp4_protocol = {

static struct xfrm4_protocol esp4_protocol = {

	.handler	=	xfrm4_rcv,

	.input_handler	=	xfrm_input,

	.cb_handler	=	esp4_rcv_cb,

	.err_handler	=	esp4_err,

	.no_policy	=	1,

	.netns_ok	=	1,

	.priority	=	0,

};



static int __init esp4_init(void)
@@ -698,7 +706,7 @@ static int __init esp4_init(void) 
		pr_info("%s: can't add xfrm type\n", __func__);

		return -EAGAIN;

	}

	if (inet_add_protocol(&esp4_protocol, IPPROTO_ESP) < 0) {

	if (xfrm4_protocol_register(&esp4_protocol, IPPROTO_ESP) < 0) {

		pr_info("%s: can't add protocol\n", __func__);

		xfrm_unregister_type(&esp_type, AF_INET);

		return -EAGAIN;
@@ -708,7 +716,7 @@ static int __init esp4_init(void) 


static void __exit esp4_fini(void)

{

	if (inet_del_protocol(&esp4_protocol, IPPROTO_ESP) < 0)

	if (xfrm4_protocol_deregister(&esp4_protocol, IPPROTO_ESP) < 0)

		pr_info("%s: can't remove protocol\n", __func__);

	if (xfrm_unregister_type(&esp_type, AF_INET) < 0)

		pr_info("%s: can't remove xfrm type\n", __func__);