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source address lookup in kernel interface

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use it for NAT detection if no source address known from config
  support for %any...%any connections
This commit is contained in:
Martin Willi
2007-06-18 07:25:58 +00:00
parent 209c2e9049
commit 7068410b6f
4 changed files with 127 additions and 21 deletions
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src/charon/sa/tasks/ike_natd.c
+35 -19
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@@ -243,29 +243,45 @@ static status_t build_i(private_ike_natd_t *this, message_t *message)
iterator_t *iterator;
host_t *host;
/* include one notify if our address is defined, all addresses otherwise */
host = this->ike_sa->get_my_host(this->ike_sa);
if (host->is_anyaddr(host))
{
iterator = charon->kernel_interface->create_address_iterator(
charon->kernel_interface);
while (iterator->iterate(iterator, (void**)&host))
{
notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
message->add_payload(message, (payload_t*)notify);
}
iterator->destroy(iterator);
}
else
{
notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
message->add_payload(message, (payload_t*)notify);
}
/* destination is always set */
host = this->ike_sa->get_other_host(this->ike_sa);
notify = build_natd_payload(this, NAT_DETECTION_DESTINATION_IP, host);
message->add_payload(message, (payload_t*)notify);
/* source may be any, we have 3 possibilities to get our source address:
* 1. It is defined in the config => use the one of the IKE_SA
* 2. We do a routing lookup in the kernel interface
* 3. Include all possbile addresses
*/
host = this->ike_sa->get_my_host(this->ike_sa);
if (!host->is_anyaddr(host))
{ /* 1. */
notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
message->add_payload(message, (payload_t*)notify);
}
else
{
host = charon->kernel_interface->get_source_addr(
charon->kernel_interface,
this->ike_sa->get_other_host(this->ike_sa));
if (host)
{ /* 2. */
notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
message->add_payload(message, (payload_t*)notify);
host->destroy(host);
}
else
{ /* 3. */
iterator = charon->kernel_interface->create_address_iterator(
charon->kernel_interface);
while (iterator->iterate(iterator, (void**)&host))
{
notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
message->add_payload(message, (payload_t*)notify);
}
iterator->destroy(iterator);
}
}
return NEED_MORE;
}