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xfrm: add support for UDPv6 encapsulation of ESP

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This patch adds support for encapsulation of ESP over UDPv6. The code
is very similar to the IPv4 encapsulation implementation, and allows
to easily add espintcp on IPv6 as a follow-up.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca
2020-04-27 17:59:34 +02:00
committed by Steffen Klassert
parent e62905ae34
commit 0146dca70b
12 changed files with 395 additions and 37 deletions
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10
net/ipv4/udp.c
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@@ -112,6 +112,9 @@
#include <net/sock_reuseport.h>
#include <net/addrconf.h>
#include <net/udp_tunnel.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <net/ipv6_stubs.h>
#endif
struct udp_table udp_table __read_mostly;
EXPORT_SYMBOL(udp_table);
@@ -2563,7 +2566,12 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
#ifdef CONFIG_XFRM
case UDP_ENCAP_ESPINUDP:
case UDP_ENCAP_ESPINUDP_NON_IKE:
up->encap_rcv = xfrm4_udp_encap_rcv;
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6)
up->encap_rcv = ipv6_stub->xfrm6_udp_encap_rcv;
else
#endif
up->encap_rcv = xfrm4_udp_encap_rcv;
#endif
fallthrough;
case UDP_ENCAP_L2TPINUDP: