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xfrm: interface: support IPIP and IPIP6 tunnels processing with .cb_handler

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Similar to ip_vti, IPIP and IPIP6 tunnels processing can easily
be done with .cb_handler for xfrm interface.

v1->v2:
  - no change.
v2-v3:
  - enable it only when CONFIG_INET_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 20:01:38 +08:00 committed by Steffen Klassert
parent d7b360c286
commit da9bbf0598
1 changed files with 32 additions and 0 deletions
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32
net/xfrm/xfrm_interface.c
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@ -842,6 +842,20 @@ static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
.priority = 10,
};
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL)
static int xfrmi4_rcv_tunnel(struct sk_buff *skb)
{
return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
}
static struct xfrm_tunnel xfrmi_ipip_handler __read_mostly = {
.handler = xfrmi4_rcv_tunnel,
.cb_handler = xfrmi_rcv_cb,
.err_handler = xfrmi4_err,
.priority = -1,
};
#endif
static int __init xfrmi4_init(void)
{
int err;
@ -855,9 +869,23 @@ static int __init xfrmi4_init(void)
err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
if (err < 0)
goto xfrm_proto_comp_failed;
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL)
err = xfrm4_tunnel_register(&xfrmi_ipip_handler, AF_INET);
if (err < 0)
goto xfrm_tunnel_ipip_failed;
err = xfrm4_tunnel_register(&xfrmi_ipip_handler, AF_INET6);
if (err < 0)
goto xfrm_tunnel_ipip6_failed;
#endif
return 0;
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL)
xfrm_tunnel_ipip6_failed:
xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
xfrm_tunnel_ipip_failed:
xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
#endif
xfrm_proto_comp_failed:
xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
xfrm_proto_ah_failed:
@ -868,6 +896,10 @@ xfrm_proto_esp_failed:
static void xfrmi4_fini(void)
{
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL)
xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET6);
xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
#endif
xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);