Pass the full list of pools to acquire_address, enumerate in providers

If the provider has access to the full pool list, it can enumerate
them twice, for example to search for existing leases first, and
only search for new leases in a second step.

Fixes lease enumeration in attr-sql using multiple pools.

src/libcharon/plugins/dhcp/dhcp_provider.c

@@ -81,18 +81,29 @@ static uintptr_t hash_transaction(dhcp_transaction_t *transaction)
 }
 
 METHOD(attribute_provider_t, acquire_address, host_t*,
-	private_dhcp_provider_t *this, char *pool,
+	private_dhcp_provider_t *this, linked_list_t *pools,
 	identification_t *id, host_t *requested)
 {
-	if (streq(pool, "dhcp") && requested->get_family(requested) == AF_INET)
-	{
-		dhcp_transaction_t *transaction, *old;
-		host_t *vip;
+	dhcp_transaction_t *transaction, *old;
+	enumerator_t *enumerator;
+	char *pool;
+	host_t *vip = NULL;
 
+	if (requested->get_family(requested) != AF_INET)
+	{
+		return NULL;
+	}
+	enumerator = pools->create_enumerator(pools);
+	while (enumerator->enumerate(enumerator, &pool))
+	{
+		if (!streq(pool, "dhcp"))
+		{
+			continue;
+		}
 		transaction = this->socket->enroll(this->socket, id);
 		if (!transaction)
 		{
-			return NULL;
+			continue;
 		}
 		vip = transaction->get_address(transaction);
 		vip = vip->clone(vip);
@@ -101,9 +112,10 @@ METHOD(attribute_provider_t, acquire_address, host_t*,
 							(void*)hash_transaction(transaction), transaction);
 		this->mutex->unlock(this->mutex);
 		DESTROY_IF(old);
-		return vip;
+		break;
 	}
-	return NULL;
+	enumerator->destroy(enumerator);
+	return vip;
 }
 
 METHOD(attribute_provider_t, release_address, bool,

src/libcharon/plugins/ha/ha_attribute.c

@@ -170,22 +170,28 @@ static bool responsible_for(private_ha_attribute_t *this, int bit)
 }
 
 METHOD(attribute_provider_t, acquire_address, host_t*,
-	private_ha_attribute_t *this, char *name, identification_t *id,
+	private_ha_attribute_t *this, linked_list_t *pools, identification_t *id,
 	host_t *requested)
 {
+	enumerator_t *enumerator;
 	pool_t *pool;
 	int offset = -1, byte, bit;
 	host_t *address;
+	char *name;
 
+	enumerator = pools->create_enumerator(pools);
 	this->mutex->lock(this->mutex);
-	pool = get_pool(this, name);
-	if (pool)
+	while (enumerator->enumerate(enumerator, &name))
 	{
+		pool = get_pool(this, name);
+		if (!pool)
+		{
+			continue;
+		}
 		if (pool->base->get_family(pool->base) !=
 			requested->get_family(requested))
 		{
-			this->mutex->unlock(this->mutex);
-			return NULL;
+			continue;
 		}
 		for (byte = 0; byte < pool->size / 8; byte++)
 		{
@@ -214,6 +220,8 @@ METHOD(attribute_provider_t, acquire_address, host_t*,
 		}
 	}
 	this->mutex->unlock(this->mutex);
+	enumerator->destroy(enumerator);
+
 	if (offset != -1)
 	{
 		address = offset2host(pool, offset);

src/libcharon/plugins/stroke/stroke_attribute.c

@@ -90,19 +90,31 @@ static mem_pool_t *find_pool(private_stroke_attribute_t *this, char *name)
 }
 
 METHOD(attribute_provider_t, acquire_address, host_t*,
-	private_stroke_attribute_t *this, char *name, identification_t *id,
+	private_stroke_attribute_t *this, linked_list_t *pools, identification_t *id,
 	host_t *requested)
 {
+	enumerator_t *enumerator;
 	mem_pool_t *pool;
 	host_t *addr = NULL;
+	char *name;
 
+	enumerator = pools->create_enumerator(pools);
 	this->lock->read_lock(this->lock);
-	pool = find_pool(this, name);
-	if (pool)
+	while (enumerator->enumerate(enumerator, &name))
 	{
-		addr = pool->acquire_address(pool, id, requested);
+		pool = find_pool(this, name);
+		if (pool)
+		{
+			addr = pool->acquire_address(pool, id, requested);
+			if (addr)
+			{
+				break;
+			}
+		}
 	}
 	this->lock->unlock(this->lock);
+	enumerator->destroy(enumerator);
+
 	return addr;
 }
 

src/libcharon/plugins/unit_tester/tests/test_pool.c

@@ -27,6 +27,7 @@ static void* testing(void *thread)
 	int i;
 	host_t *addr[ALLOCS];
 	identification_t *id[ALLOCS];
+	linked_list_t *pools;
 
 	/* prepare identities */
 	for (i = 0; i < ALLOCS; i++)
@@ -37,17 +38,23 @@ static void* testing(void *thread)
 		id[i] = identification_create_from_string(buf);
 	}
 
+	pools = linked_list_create();
+	pools->insert_last(pools, "test");
+
 	/* allocate addresses */
 	for (i = 0; i < ALLOCS; i++)
 	{
 		addr[i] = hydra->attributes->acquire_address(hydra->attributes,
-													 "test", id[i], NULL);
+													 pools, id[i], NULL);
 		if (!addr[i])
 		{
+			pools->destroy(pools);
 			return (void*)FALSE;
 		}
 	}
 
+	pools->destroy(pools);
+
 	/* release addresses */
 	for (i = 0; i < ALLOCS; i++)
 	{

src/libcharon/sa/ikev1/tasks/mode_config.c

@@ -330,29 +330,23 @@ METHOD(task_t, build_r, status_t,
 	id = this->ike_sa->get_other_eap_id(this->ike_sa);
 	config = this->ike_sa->get_peer_cfg(this->ike_sa);
 	vips = linked_list_create();
-	pools = linked_list_create();
+	pools = linked_list_create_from_enumerator(
+									config->create_pool_enumerator(config));
 
 	this->ike_sa->clear_virtual_ips(this->ike_sa, FALSE);
 
 	enumerator = this->vips->create_enumerator(this->vips);
 	while (enumerator->enumerate(enumerator, &requested))
 	{
-		enumerator_t *poolenum;
-		char *pool;
 		host_t *found = NULL;
 
 		/* query all pools until we get an address */
 		DBG1(DBG_IKE, "peer requested virtual IP %H", requested);
 
-		poolenum = config->create_pool_enumerator(config);
-		while (poolenum->enumerate(poolenum, &pool))
+		found = hydra->attributes->acquire_address(hydra->attributes,
+												   pools, id, requested);
+		if (found)
 		{
-			found = hydra->attributes->acquire_address(hydra->attributes,
-													   pool, id, requested);
-			if (!found)
-			{
-				continue;
-			}
 			DBG1(DBG_IKE, "assigning virtual IP %H to peer '%Y'", found, id);
 			this->ike_sa->add_virtual_ip(this->ike_sa, FALSE, found);
 			if (!cp)
@@ -360,17 +354,9 @@ METHOD(task_t, build_r, status_t,
 				cp = cp_payload_create_type(CONFIGURATION_V1, CFG_REPLY);
 			}
 			cp->add_attribute(cp, build_vip(found));
-			/* use pool to request other attributes */
-			if (pools->find_first(pools, NULL, (void**)&pool) == NOT_FOUND)
-			{
-				pools->insert_last(pools, pool);
-			}
 			vips->insert_last(vips, found);
-			break;
 		}
-		poolenum->destroy(poolenum);
-
-		if (!found)
+		else
 		{
 			DBG1(DBG_IKE, "no virtual IP found for %H requested by '%Y'",
 				 requested, id);

src/libcharon/sa/ikev2/tasks/ike_config.c

@@ -342,29 +342,23 @@ METHOD(task_t, build_r, status_t,
 		id = this->ike_sa->get_other_eap_id(this->ike_sa);
 		config = this->ike_sa->get_peer_cfg(this->ike_sa);
 		vips = linked_list_create();
-		pools = linked_list_create();
+		pools = linked_list_create_from_enumerator(
+									config->create_pool_enumerator(config));
 
 		this->ike_sa->clear_virtual_ips(this->ike_sa, FALSE);
 
 		enumerator = this->vips->create_enumerator(this->vips);
 		while (enumerator->enumerate(enumerator, &requested))
 		{
-			enumerator_t *poolenum;
-			char *pool;
 			host_t *found = NULL;
 
 			/* query all pools until we get an address */
 			DBG1(DBG_IKE, "peer requested virtual IP %H", requested);
 
-			poolenum = config->create_pool_enumerator(config);
-			while (poolenum->enumerate(poolenum, &pool))
+			found = hydra->attributes->acquire_address(hydra->attributes,
+													   pools, id, requested);
+			if (found)
 			{
-				found = hydra->attributes->acquire_address(hydra->attributes,
-														   pool, id, requested);
-				if (!found)
-				{
-					continue;
-				}
 				DBG1(DBG_IKE, "assigning virtual IP %H to peer '%Y'", found, id);
 				this->ike_sa->add_virtual_ip(this->ike_sa, FALSE, found);
 				if (!cp)
@@ -372,17 +366,9 @@ METHOD(task_t, build_r, status_t,
 					cp = cp_payload_create_type(CONFIGURATION, CFG_REPLY);
 				}
 				cp->add_attribute(cp, build_vip(found));
-				/* use pool to request other attributes */
-				if (pools->find_first(pools, NULL, (void**)&pool) == NOT_FOUND)
-				{
-					pools->insert_last(pools, pool);
-				}
 				vips->insert_last(vips, found);
-				break;
 			}
-			poolenum->destroy(poolenum);
-
-			if (!found)
+			else
 			{
 				DBG1(DBG_IKE, "no virtual IP found for %H requested by '%Y'",
 					 requested, id);

src/libhydra/attributes/attribute_manager.c

@@ -60,8 +60,8 @@ typedef struct {
 } enum_data_t;
 
 METHOD(attribute_manager_t, acquire_address, host_t*,
-	private_attribute_manager_t *this, char *pool, identification_t *id,
-	host_t *requested)
+	private_attribute_manager_t *this, linked_list_t *pools,
+	identification_t *id, host_t *requested)
 {
 	enumerator_t *enumerator;
 	attribute_provider_t *current;
@@ -71,7 +71,7 @@ METHOD(attribute_manager_t, acquire_address, host_t*,
 	enumerator = this->providers->create_enumerator(this->providers);
 	while (enumerator->enumerate(enumerator, &current))
 	{
-		host = current->acquire_address(current, pool, id, requested);
+		host = current->acquire_address(current, pools, id, requested);
 		if (host)
 		{
 			break;

src/libhydra/attributes/attribute_manager.h

@@ -39,13 +39,13 @@ struct attribute_manager_t {
 	/**
 	 * Acquire a virtual IP address to assign to a peer.
 	 *
-	 * @param pool			pool name to acquire address from
+	 * @param pools			list of pool names (char*) to acquire from
 	 * @param id			peer identity to get address forua
 	 * @param requested		IP in configuration request
 	 * @return				allocated address, NULL to serve none
 	 */
 	host_t* (*acquire_address)(attribute_manager_t *this,
-							   char *pool, identification_t *id,
+							   linked_list_t *pool, identification_t *id,
 							   host_t *requested);
 
 	/**

src/libhydra/attributes/attribute_provider.h

@@ -35,13 +35,13 @@ struct attribute_provider_t {
 	/**
 	 * Acquire a virtual IP address to assign to a peer.
 	 *
-	 * @param pool			name of the pool to acquire address from
+	 * @param pools			list of pool names (char*) to acquire from
 	 * @param id			peer ID
 	 * @param requested		IP in configuration request
 	 * @return				allocated address, NULL to serve none
 	 */
 	host_t* (*acquire_address)(attribute_provider_t *this,
-							   char *pool, identification_t *id,
+							   linked_list_t *pools, identification_t *id,
 							   host_t *requested);
 	/**
 	 * Release a previously acquired address.

src/libhydra/plugins/attr_sql/sql_attribute.c

@@ -233,26 +233,51 @@ static host_t* get_lease(private_sql_attribute_t *this, char *name,
 }
 
 METHOD(attribute_provider_t, acquire_address, host_t*,
-	private_sql_attribute_t *this, char *name, identification_t *id,
+	private_sql_attribute_t *this, linked_list_t *pools, identification_t *id,
 	host_t *requested)
 {
+	enumerator_t *enumerator;
 	host_t *address = NULL;
 	u_int identity, pool, timeout;
+	char *name;
 
 	identity = get_identity(this, id);
 	if (identity)
 	{
-		pool = get_pool(this, name, &timeout);
-		if (pool)
+		/* check for an existing lease in all pools */
+		enumerator = pools->create_enumerator(pools);
+		while (enumerator->enumerate(enumerator, &name))
 		{
-			/* check for an existing lease */
-			address = check_lease(this, name, pool, identity);
-			if (address == NULL)
+			pool = get_pool(this, name, &timeout);
+			if (pool)
 			{
-				/* get an unallocated address or expired lease */
-				address = get_lease(this, name, pool, timeout, identity);
+				address = check_lease(this, name, pool, identity);
+				if (address)
+				{
+					break;
+				}
 			}
 		}
+		enumerator->destroy(enumerator);
+
+		if (!address)
+		{
+			/* get an unallocated address or expired lease */
+			enumerator = pools->create_enumerator(pools);
+			while (enumerator->enumerate(enumerator, &name))
+			{
+				pool = get_pool(this, name, &timeout);
+				if (pool)
+				{
+					address = get_lease(this, name, pool, timeout, identity);
+					if (address)
+					{
+						break;
+					}
+				}
+			}
+			enumerator->destroy(enumerator);
+		}
 	}
 	return address;
 }