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xfrm: interface: support IP6IP6 and IP6IP tunnels processing with .cb_handler 

Similar to ip6_vti, IP6IP6 and IP6IP tunnels processing can easily
be done with .cb_handler for xfrm interface.

v1->v2:
  - no change.
v2-v3:
  - enable it only when CONFIG_INET6_XFRM_TUNNEL is defined, to fix
    the build error, reported by kbuild test robot.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Xin Long 2020-07-06 20:01:37 +08:00 committed by Steffen Klassert
parent d5a7a50573
commit d7b360c286
1 changed files with 38 additions and 0 deletions
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38
net/xfrm/xfrm_interface.c
View File

@ -798,6 +798,26 @@ static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
.priority = 10,
};
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
static int xfrmi6_rcv_tunnel(struct sk_buff *skb)
{
const xfrm_address_t *saddr;
__be32 spi;
saddr = (const xfrm_address_t *)&ipv6_hdr(skb)->saddr;
spi = xfrm6_tunnel_spi_lookup(dev_net(skb->dev), saddr);
return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
}
static struct xfrm6_tunnel xfrmi_ipv6_handler __read_mostly = {
.handler = xfrmi6_rcv_tunnel,
.cb_handler = xfrmi_rcv_cb,
.err_handler = xfrmi6_err,
.priority = -1,
};
#endif
static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
.handler = xfrm4_rcv,
.input_handler = xfrm_input,
@ -866,9 +886,23 @@ static int __init xfrmi6_init(void)
err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
if (err < 0)
goto xfrm_proto_comp_failed;
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
err = xfrm6_tunnel_register(&xfrmi_ipv6_handler, AF_INET6);
if (err < 0)
goto xfrm_tunnel_ipv6_failed;
err = xfrm6_tunnel_register(&xfrmi_ipv6_handler, AF_INET);
if (err < 0)
goto xfrm_tunnel_ip6ip_failed;
#endif
return 0;
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
xfrm_tunnel_ip6ip_failed:
xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
xfrm_tunnel_ipv6_failed:
xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
#endif
xfrm_proto_comp_failed:
xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
xfrm_proto_ah_failed:
@ -879,6 +913,10 @@ xfrm_proto_esp_failed:
static void xfrmi6_fini(void)
{
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET);
xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
#endif
xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);