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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
2020-04-28 11:28:36 +02:00
committed by Steffen Klassert
parent e62905ae34
commit 0146dca70b
12 changed files with 395 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/net/ipv6_stubs.h
+3
View File
@@ -56,6 +56,9 @@ struct ipv6_stub {
void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
const struct in6_addr *solicited_addr,
bool router, bool solicited, bool override, bool inc_opt);
#if IS_ENABLED(CONFIG_XFRM)
int (*xfrm6_udp_encap_rcv)(struct sock *sk, struct sk_buff *skb);
#endif
struct neigh_table *nd_tbl;
};
extern const struct ipv6_stub *ipv6_stub __read_mostly;
include/net/xfrm.h
+5
View File
@@ -1406,6 +1406,8 @@ struct xfrm4_protocol {
struct xfrm6_protocol {
int (*handler)(struct sk_buff *skb);
int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type);
int (*cb_handler)(struct sk_buff *skb, int err);
int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
u8 type, u8 code, int offset, __be32 info);
@@ -1590,6 +1592,8 @@ int xfrm6_extract_header(struct sk_buff *skb);
int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
struct ip6_tnl *t);
int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type);
int xfrm6_transport_finish(struct sk_buff *skb, int async);
int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
int xfrm6_rcv(struct sk_buff *skb);
@@ -1610,6 +1614,7 @@ int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
#ifdef CONFIG_XFRM
int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
int xfrm_user_policy(struct sock *sk, int optname,
u8 __user *optval, int optlen);
#else