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ike: Force NAT-T/UDP encapsulation if kernel interface requires it

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This commit is contained in:
Tobias Brunner
2013-06-21 17:03:21 +02:00
parent 35fe41f7d0
commit 01955eec71
2 changed files with 32 additions and 5 deletions
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src/libcharon/sa/ikev1/tasks/isakmp_natd.c
+16 -2
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@@ -96,6 +96,20 @@ struct private_isakmp_natd_t {
bool dst_matched;
};
/**
* Check if UDP encapsulation has to be forced either by config or required
* by the kernel interface
*/
static bool force_encap(ike_cfg_t *ike_cfg)
{
if (!ike_cfg->force_encap(ike_cfg))
{
return hydra->kernel_interface->get_features(hydra->kernel_interface) &
KERNEL_REQUIRE_UDP_ENCAPSULATION;
}
return TRUE;
}
/**
* Get NAT-D payload type (RFC 3947 or RFC 3947 drafts).
*/
@@ -183,7 +197,7 @@ static hash_payload_t *build_natd_payload(private_isakmp_natd_t *this, bool src,
chunk_t hash;
config = this->ike_sa->get_ike_cfg(this->ike_sa);
if (src && config->force_encap(config))
if (src && force_encap(config))
{
hash = generate_natd_hash_faked(this);
}
@@ -297,7 +311,7 @@ static void process_payloads(private_isakmp_natd_t *this, message_t *message)
!this->src_matched);
config = this->ike_sa->get_ike_cfg(this->ike_sa);
if (this->dst_matched && this->src_matched &&
config->force_encap(config))
force_encap(config))
{
this->ike_sa->set_condition(this->ike_sa, COND_NAT_FAKE, TRUE);
}