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Give plugins more control of which configuration attributes to request, and pass received attributes back to the requesting handler

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This commit is contained in:
Martin Willi
2009-11-17 14:51:50 +01:00
parent e6cf060275
commit b5a2055fb1
16 changed files with 503 additions and 302 deletions
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src/libstrongswan/attributes/attribute_handler.h
+11
View File
@@ -22,6 +22,7 @@
#define ATTRIBUTE_HANDLER_H_
#include <chunk.h>
#include <utils/host.h>
#include <utils/identification.h>
#include "attributes.h"
@@ -56,6 +57,16 @@ struct attribute_handler_t {
*/
void (*release)(attribute_handler_t *this, identification_t *server,
configuration_attribute_type_t type, chunk_t data);
/**
* Enumerate attributes to request from a server.
*
* @param server server identity to request attributes from
* @param vip virtual IP we are requesting, if any
* @return enumerator (configuration_attribute_type_t, chunk_t)
*/
enumerator_t* (*create_attribute_enumerator)(attribute_handler_t *this,
identification_t *server, host_t *vip);
};
#endif /** ATTRIBUTE_HANDLER_H_ @}*/
src/libstrongswan/attributes/attribute_manager.c
+70 -14
View File
@@ -47,6 +47,16 @@ struct private_attribute_manager_t {
rwlock_t *lock;
};
/**
* Data to pass to enumerator filters
*/
typedef struct {
/** server/peer identity */
identification_t *id;
/** requesting/assigned virtual IP */
host_t *vip;
} enum_data_t;
/**
* Implementation of attribute_manager_t.acquire_address.
*/
@@ -108,25 +118,29 @@ static void release_address(private_attribute_manager_t *this,
}
/**
* inner enumerator constructor for attributes
* inner enumerator constructor for responder attributes
*/
static enumerator_t *attrib_enum_create(attribute_provider_t *provider,
identification_t *id)
static enumerator_t *responder_enum_create(attribute_provider_t *provider,
enum_data_t *data)
{
return provider->create_attribute_enumerator(provider, id);
return provider->create_attribute_enumerator(provider, data->id, data->vip);
}
/**
* Implementation of attribute_manager_t.create_attribute_enumerator
* Implementation of attribute_manager_t.create_responder_enumerator
*/
static enumerator_t* create_attribute_enumerator(
private_attribute_manager_t *this, identification_t *id)
static enumerator_t* create_responder_enumerator(
private_attribute_manager_t *this, identification_t *id, host_t *vip)
{
enum_data_t *data = malloc_thing(enum_data_t);
data->id = id;
data->vip = vip;
this->lock->read_lock(this->lock);
return enumerator_create_cleaner(
enumerator_create_nested(
this->providers->create_enumerator(this->providers),
(void*)attrib_enum_create, id, NULL),
(void*)responder_enum_create, data, free),
(void*)this->lock->unlock, this->lock);
}
@@ -156,24 +170,38 @@ static void remove_provider(private_attribute_manager_t *this,
* Implementation of attribute_manager_t.handle
*/
static attribute_handler_t* handle(private_attribute_manager_t *this,
identification_t *server,
configuration_attribute_type_t type,
chunk_t data)
identification_t *server, attribute_handler_t *handler,
configuration_attribute_type_t type, chunk_t data)
{
enumerator_t *enumerator;
attribute_handler_t *current, *handled = NULL;
this->lock->read_lock(this->lock);
/* try to find the passed handler */
enumerator = this->handlers->create_enumerator(this->handlers);
while (enumerator->enumerate(enumerator, &current))
{
if (current->handle(current, server, type, data))
if (current == handler && current->handle(current, server, type, data))
{
handled = current;
break;
}
}
enumerator->destroy(enumerator);
if (!handled)
{ /* handler requesting this attribute not found, try any other */
enumerator = this->handlers->create_enumerator(this->handlers);
while (enumerator->enumerate(enumerator, &current))
{
if (current->handle(current, server, type, data))
{
handled = current;
break;
}
}
enumerator->destroy(enumerator);
}
this->lock->unlock(this->lock);
if (!handled)
@@ -209,6 +237,33 @@ static void release(private_attribute_manager_t *this,
this->lock->unlock(this->lock);
}
/**
* inner enumerator constructor for initiator attributes
*/
static enumerator_t *initiator_enum_create(attribute_handler_t *handler,
enum_data_t *data)
{
return handler->create_attribute_enumerator(handler, data->id, data->vip);
}
/**
* Implementation of attribute_manager_t.create_initiator_enumerator
*/
static enumerator_t* create_initiator_enumerator(
private_attribute_manager_t *this, identification_t *id, host_t *vip)
{
enum_data_t *data = malloc_thing(enum_data_t);
data->id = id;
data->vip = vip;
this->lock->read_lock(this->lock);
return enumerator_create_cleaner(
enumerator_create_nested(
this->handlers->create_enumerator(this->handlers),
(void*)initiator_enum_create, data, free),
(void*)this->lock->unlock, this->lock);
}
/**
* Implementation of attribute_manager_t.add_handler
*/
@@ -251,11 +306,12 @@ attribute_manager_t *attribute_manager_create()
this->public.acquire_address = (host_t*(*)(attribute_manager_t*, char*, identification_t*,host_t*))acquire_address;
this->public.release_address = (void(*)(attribute_manager_t*, char *, host_t*, identification_t*))release_address;
this->public.create_attribute_enumerator = (enumerator_t*(*)(attribute_manager_t*, identification_t*))create_attribute_enumerator;
this->public.create_responder_enumerator = (enumerator_t*(*)(attribute_manager_t*, identification_t*, host_t*))create_responder_enumerator;
this->public.add_provider = (void(*)(attribute_manager_t*, attribute_provider_t *provider))add_provider;
this->public.remove_provider = (void(*)(attribute_manager_t*, attribute_provider_t *provider))remove_provider;
this->public.handle = (attribute_handler_t*(*)(attribute_manager_t*, identification_t*, configuration_attribute_type_t, chunk_t))handle;
this->public.handle = (attribute_handler_t*(*)(attribute_manager_t*,identification_t*, attribute_handler_t*, configuration_attribute_type_t, chunk_t))handle;
this->public.release = (void(*)(attribute_manager_t*, attribute_handler_t*, identification_t*, configuration_attribute_type_t, chunk_t))release;
this->public.create_initiator_enumerator = (enumerator_t*(*)(attribute_manager_t*, identification_t*, host_t*))create_initiator_enumerator;
this->public.add_handler = (void(*)(attribute_manager_t*, attribute_handler_t*))add_handler;
this->public.remove_handler = (void(*)(attribute_manager_t*, attribute_handler_t*))remove_handler;
this->public.destroy = (void(*)(attribute_manager_t*))destroy;
src/libstrongswan/attributes/attribute_manager.h
+16 -4
View File
@@ -62,10 +62,11 @@ struct attribute_manager_t {
* Create an enumerator over attributes to hand out to a peer.
*
* @param id peer identity to hand out attributes to
* @param vip virtual IP to assign to peer, if any
* @return enumerator (configuration_attribute_type_t, chunk_t)
*/
enumerator_t* (*create_attribute_enumerator)(attribute_manager_t *this,
identification_t *id);
enumerator_t* (*create_responder_enumerator)(attribute_manager_t *this,
identification_t *id, host_t *vip);
/**
* Register an attribute provider to the manager.
@@ -86,13 +87,14 @@ struct attribute_manager_t {
* Handle a configuration attribute by passing them to the handlers.
*
* @param server server from which the attribute was received
* @param handler handler we requested the attribute for, if any
* @param type type of configuration attribute
* @param data associated attribute data
* @return handler which handled this attribute, NULL if none
*/
attribute_handler_t* (*handle)(attribute_manager_t *this,
identification_t *server,
configuration_attribute_type_t type, chunk_t data);
identification_t *server, attribute_handler_t *handler,
configuration_attribute_type_t type, chunk_t data);
/**
* Release an attribute previously handle()d by a handler.
@@ -107,6 +109,16 @@ struct attribute_manager_t {
configuration_attribute_type_t type,
chunk_t data);
/**
* Create an enumerator over attributes to request from server.
*
* @param id server identity to hand out attributes to
* @param vip virtual IP going to request, if any
* @return enumerator (attribute_handler_t, ca_type_t, chunk_t)
*/
enumerator_t* (*create_initiator_enumerator)(attribute_manager_t *this,
identification_t *id, host_t *vip);
/**
* Register an attribute handler to the manager.
*
src/libstrongswan/attributes/attribute_provider.h
+2 -1
View File
@@ -57,10 +57,11 @@ struct attribute_provider_t {
* Create an enumerator over attributes to hand out to a peer.
*
* @param id peer ID
* @param vip virtual IP to assign to peer, if any
* @return enumerator (configuration_attribute_type_t, chunk_t)
*/
enumerator_t* (*create_attribute_enumerator)(attribute_provider_t *this,
identification_t *id);
identification_t *id, host_t *vip);
};
#endif /** ATTRIBUTE_PROVIDER_H_ @}*/