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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next

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Steffen Klassert says:

====================
1) Don't use a wildcard SA if a more precise one is in acquire state,
   from Fan Du.

2) Simplify the SA lookup when using wildcard source. We need to check
   only the destination in this case, from Fan Du.

3) Add a receive path hook for IPsec virtual tunnel interfaces
   to xfrm6_mode_tunnel.

4) Add support for IPsec virtual tunnel interfaces to ipv6.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-10-18 13:51:35 -04:00
commit 9aaf0435b4
6 changed files with 1141 additions and 2 deletions
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2
include/net/xfrm.h
View File

@ -1508,6 +1508,8 @@ int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
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);

11
net/ipv6/Kconfig
View File

@ -153,6 +153,17 @@ config INET6_XFRM_MODE_ROUTEOPTIMIZATION
---help---
Support for MIPv6 route optimization mode.
config IPV6_VTI
tristate "Virtual (secure) IPv6: tunneling"
select IPV6_TUNNEL
depends on INET6_XFRM_MODE_TUNNEL
---help---
Tunneling means encapsulating data of one protocol type within
another protocol and sending it over a channel that understands the
encapsulating protocol. This can be used with xfrm mode tunnel to give
the notion of a secure tunnel for IPSEC and then use routing protocol
on top.
config IPV6_SIT
tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
select INET_TUNNEL

1
net/ipv6/Makefile
View File

@ -36,6 +36,7 @@ obj-$(CONFIG_INET6_XFRM_MODE_BEET) += xfrm6_mode_beet.o
obj-$(CONFIG_IPV6_MIP6) += mip6.o
obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_IPV6_VTI) += ip6_vti.o
obj-$(CONFIG_IPV6_SIT) += sit.o
obj-$(CONFIG_IPV6_TUNNEL) += ip6_tunnel.o
obj-$(CONFIG_IPV6_GRE) += ip6_gre.o

1056
net/ipv6/ip6_vti.c Normal file
View File

File diff suppressed because it is too large Load Diff

69
net/ipv6/xfrm6_mode_tunnel.c
View File

@ -18,6 +18,65 @@
#include <net/ipv6.h>
#include <net/xfrm.h>
/* Informational hook. The decap is still done here. */
static struct xfrm_tunnel_notifier __rcu *rcv_notify_handlers __read_mostly;
static DEFINE_MUTEX(xfrm6_mode_tunnel_input_mutex);
int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler)
{
struct xfrm_tunnel_notifier __rcu **pprev;
struct xfrm_tunnel_notifier *t;
int ret = -EEXIST;
int priority = handler->priority;
mutex_lock(&xfrm6_mode_tunnel_input_mutex);
for (pprev = &rcv_notify_handlers;
(t = rcu_dereference_protected(*pprev,
lockdep_is_held(&xfrm6_mode_tunnel_input_mutex))) != NULL;
pprev = &t->next) {
if (t->priority > priority)
break;
if (t->priority == priority)
goto err;
}
handler->next = *pprev;
rcu_assign_pointer(*pprev, handler);
ret = 0;
err:
mutex_unlock(&xfrm6_mode_tunnel_input_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(xfrm6_mode_tunnel_input_register);
int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler)
{
struct xfrm_tunnel_notifier __rcu **pprev;
struct xfrm_tunnel_notifier *t;
int ret = -ENOENT;
mutex_lock(&xfrm6_mode_tunnel_input_mutex);
for (pprev = &rcv_notify_handlers;
(t = rcu_dereference_protected(*pprev,
lockdep_is_held(&xfrm6_mode_tunnel_input_mutex))) != NULL;
pprev = &t->next) {
if (t == handler) {
*pprev = handler->next;
ret = 0;
break;
}
}
mutex_unlock(&xfrm6_mode_tunnel_input_mutex);
synchronize_net();
return ret;
}
EXPORT_SYMBOL_GPL(xfrm6_mode_tunnel_input_deregister);
static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
{
const struct ipv6hdr *outer_iph = ipv6_hdr(skb);
@ -63,8 +122,15 @@ static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
return 0;
}
#define for_each_input_rcu(head, handler) \
for (handler = rcu_dereference(head); \
handler != NULL; \
handler = rcu_dereference(handler->next))
static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
struct xfrm_tunnel_notifier *handler;
int err = -EINVAL;
if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPV6)
@ -72,6 +138,9 @@ static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
goto out;
for_each_input_rcu(rcv_notify_handlers, handler)
handler->handler(skb);
err = skb_unclone(skb, GFP_ATOMIC);
if (err)
goto out;

4
net/xfrm/xfrm_state.c
View File

@ -815,7 +815,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
xfrm_state_look_at(pol, x, fl, encap_family,
&best, &acquire_in_progress, &error);
}
if (best)
if (best || acquire_in_progress)
goto found;
h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
@ -824,7 +824,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
x->props.reqid == tmpl->reqid &&
(mark & x->mark.m) == x->mark.v &&
!(x->props.flags & XFRM_STATE_WILDRECV) &&
xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
tmpl->mode == x->props.mode &&
tmpl->id.proto == x->id.proto &&
(tmpl->id.spi == x->id.spi || !tmpl->id.spi))