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kernel-libipsec: Handle packets between charon socket, libipsec and TUN device

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This commit is contained in:
Tobias Brunner
2013-06-21 17:03:20 +02:00
parent 59be6ddd08
commit 44a49681fd
1 changed files with 85 additions and 0 deletions
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src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c
+85
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@@ -16,8 +16,10 @@
#include "kernel_libipsec_plugin.h"
#include "kernel_libipsec_ipsec.h"
#include <daemon.h>
#include <ipsec.h>
#include <networking/tun_device.h>
#include <processing/jobs/callback_job.h>
#include <utils/debug.h>
#define TUN_DEFAULT_MTU 1400
@@ -47,12 +49,95 @@ METHOD(plugin_t, get_name, char*,
return "kernel-libipsec";
}
/**
* Outbound callback
*/
static void send_esp(void *data, esp_packet_t *packet)
{
charon->sender->send_no_marker(charon->sender, (packet_t*)packet);
}
/**
* Inbound callback
*/
static void deliver_plain(private_kernel_libipsec_plugin_t *this,
ip_packet_t *packet)
{
this->tun->write_packet(this->tun, packet->get_encoding(packet));
packet->destroy(packet);
}
/**
* Receiver callback
*/
static void receiver_esp_cb(void *data, packet_t *packet)
{
ipsec->processor->queue_inbound(ipsec->processor,
esp_packet_create_from_packet(packet));
}
/**
* Job handling outbound plaintext packets
*/
static job_requeue_t handle_plain(private_kernel_libipsec_plugin_t *this)
{
chunk_t raw;
if (this->tun->read_packet(this->tun, &raw))
{
ip_packet_t *packet;
packet = ip_packet_create(raw);
if (packet)
{
ipsec->processor->queue_outbound(ipsec->processor, packet);
}
else
{
DBG1(DBG_KNL, "invalid IP packet read from TUN device");
}
}
return JOB_REQUEUE_DIRECT;
}
/**
* Initialize/deinitialize sender and receiver
*/
static bool packet_handler_cb(private_kernel_libipsec_plugin_t *this,
plugin_feature_t *feature, bool reg, void *arg)
{
if (reg)
{
ipsec->processor->register_outbound(ipsec->processor, send_esp, NULL);
ipsec->processor->register_inbound(ipsec->processor,
(ipsec_inbound_cb_t)deliver_plain, this);
charon->receiver->add_esp_cb(charon->receiver,
(receiver_esp_cb_t)receiver_esp_cb, NULL);
lib->processor->queue_job(lib->processor,
(job_t*)callback_job_create((callback_job_cb_t)handle_plain, this,
NULL, (callback_job_cancel_t)return_false));
}
else
{
charon->receiver->del_esp_cb(charon->receiver,
(receiver_esp_cb_t)receiver_esp_cb);
ipsec->processor->unregister_outbound(ipsec->processor,
(ipsec_outbound_cb_t)send_esp);
ipsec->processor->unregister_inbound(ipsec->processor,
(ipsec_inbound_cb_t)deliver_plain);
}
return TRUE;
}
METHOD(plugin_t, get_features, int,
private_kernel_libipsec_plugin_t *this, plugin_feature_t *features[])
{
static plugin_feature_t f[] = {
PLUGIN_CALLBACK(kernel_ipsec_register, kernel_libipsec_ipsec_create),
PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
PLUGIN_CALLBACK((plugin_feature_callback_t)packet_handler_cb, NULL),
PLUGIN_PROVIDE(CUSTOM, "kernel-libipsec-handler"),
PLUGIN_DEPENDS(CUSTOM, "libcharon-receiver"),
};
*features = f;
return countof(f);