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one/include/AddressRangePool.h

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2014, OpenNebula Project (OpenNebula.org), C12G Labs */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef ADDRESS_RANGE_POOL_H_
#define ADDRESS_RANGE_POOL_H_
#include <string>
#include <vector>
#include <map>
#include <libxml/parser.h>
#include "Template.h"
#include "PoolObjectSQL.h"
class VectorAttribute;
class AddressRange;
using namespace std;
class AddressRangePool
{
public:
AddressRangePool();
virtual ~AddressRangePool();
// *************************************************************************
// Inititalization functions
// *************************************************************************
/**
* Builds the address range from a VectorAttribute. This function is used
* to create address ranges.
* @param ars the vector of address ranges
* @param error_msg describing the error
* @return 0 on success
*/
int from_vattr(VectorAttribute * ar, string& error_msg);
/**
* Builds the address range set from its XML representation. This function
* is used to rebuild the address ranges from the DB.
* @param node xmlNode for the template
* @return 0 on success
*/
int from_xml_node(const xmlNodePtr node);
// *************************************************************************
// Address Range management interface
// *************************************************************************
/**
* Removes an address range from the pool if it does not contain any used
* leases
* @param arid of the address range to be removed
* @return 0 on success, -1 if not exists or has used addresses
*/
int rm_ar(unsigned int ar_id, string& error_msg);
/**
* Updates the given address ranges
* @param ars vector of address ranges as VectorAttributes obtained from
* template in the form AR = [...]. Only one AR is processed.
* @param error_msg If the action fails, this message contains
* the reason.
* @return 0 on success
*/
int update_ar(vector<Attribute *> ars, string& error_msg);
/**
* Allocates a new *empty* address range. It is not added to the pool as it
* needs to be initialized. Only the AR_ID is set.
* @return the new address range.
*/
AddressRange * allocate_ar();
/**
* Adds a new address range to the pool. It should be allocated by the
* allocate_ar() function.
* @param ar the new address range;
* @return 0 on success
*/
int add_ar(AddressRange * ar);
// *************************************************************************
// Address allocation interface
// *************************************************************************
/**
* Allocates an address in a suitable address range from the pool
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param nic the NIC attribute to be filled with lease attributes
* @param inherit attributes to be added to the NIC
* @return 0 if success
*/
int allocate_addr(PoolObjectSQL::ObjectType ot, int obid,
VectorAttribute * nic, const vector<string> &inherit);
/**
* Allocates an address in a suitable address range from the pool by mac
* @param mac the specific MAC address requested
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param nic the NIC attribute to be filled with lease attributes
* @param inherit attributes to be added to the NIC
* @return 0 if success
*/
int allocate_by_mac(const string &mac, PoolObjectSQL::ObjectType ot, int obid,
VectorAttribute * nic, const vector<string> &inherit);
/**
* Allocates an address in a suitable address range from the pool by mac
* @param ip the specific IP address requested
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param nic the NIC attribute to be filled with lease attributes
* @param inherit attributes to be added to the NIC
* @return 0 if success
*/
int allocate_by_ip(const string &ip, PoolObjectSQL::ObjectType ot, int obid,
VectorAttribute * nic, const vector<string> &inherit);
/**
* Holds an address from the specified address range.
* @param arid of the address range
* @param ip the ip to hold
* @return 0 on success
*/
int hold_by_ip(unsigned int arid, const string& ip);
/**
* Holds an address from the first address range containing the MAC
* @param mac the mac to hold
* @return 0 on success
*/
int hold_by_ip(const string& ip);
/**
* Holds an address from the specified address range.
* @param arid of the address range
* @param mac the mac to hold
* @return 0 on success
*/
int hold_by_mac(unsigned int arid, const string& mac);
/**
* Holds an address from the first address range containing the MAC
* @param mac the mac to hold
* @return 0 on success
*/
int hold_by_mac(const string& mac);
/**
* Frees the given address by MAC on the given address range
* @param arid the ID of the address range
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param mac the specific MAC address requested
*/
void free_addr(unsigned int arid, PoolObjectSQL::ObjectType ot, int obid,
const string& mac);
/**
* Frees the given address by IP on the given address range
* @param arid the ID of the address range
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param ip the specific IP address requested
*/
void free_addr_by_ip(unsigned int arid, PoolObjectSQL::ObjectType ot,
int obid, const string& ip);
/**
* Frees the given address by MAC from all address ranges containing
* the MAC
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param mac the specific MAC address requested
*/
void free_addr(PoolObjectSQL::ObjectType ot, int obid, const string& mac);
/**
* Frees the given address by IP from all address ranges containing
* the IP
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param ip the specific IP address requested
*/
void free_addr_by_ip(PoolObjectSQL::ObjectType ot, int id, const string& ip);
/**
* Frees all the addressed owned by the given object
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @return the number of addresses freed
*/
int free_addr_by_owner(PoolObjectSQL::ObjectType ot, int obid);
/**
* Frees the given address range
* @param arid the ID of the address range
* @param ot the type of the object requesting the address (VM or NET)
* @param obid the id of the object requesting the address
* @param mac the first MAC address in the range
* @param rsize size of the address range
*/
int free_addr_by_range(unsigned int arid, PoolObjectSQL::ObjectType ot,
int obid, const string& mac, unsigned int rsize);
// *************************************************************************
// Address reservation
// *************************************************************************
/**
* Reserve a given number of addresses from the first address range with
* enough free addresses to allocate the reservation
* @param vid the id of the VNET making the reservation
* @param size number of addresses to reserve
* @param rar a new address range to place the reservation
* @return 0 on success
*/
int reserve_addr(int vid, unsigned int rsize, AddressRange *rar);
/**
* Reserve a given number of addresses from the given address range
* @param vid the id of the VNET making the reservation
* @param rsize number of addresses to reserve
* @param ar_id the address range to reserve the addresses from
* @param rar a new address range to place the reservation
* @return 0 on success
*/
int reserve_addr(int vid, unsigned int rsize, unsigned int ar_id,
AddressRange *rar);
/**
* Reserve a number of addresses from an address range from a given ip
* @param vid the id of the VNET making the reservation
* @param rsize number of addresses to reserve
* @param ar_id the address range to reserve the addresses from
* @param ip the first IP in the reservation
* @param rar a new address range to place the reservation
* @return 0 on success
*/
int reserve_addr_by_ip(int vid, unsigned int rsize, unsigned int ar_id,
const string& ip, AddressRange *rar);
/**
* Reserve a number of addresses from an address range from a given ip
* @param vid the id of the VNET making the reservation
* @param rsize number of addresses to reserve
* @param ar_id the address range to reserve the addresses from
* @param mac the first IP in the reservation
* @param rar a new address range to place the reservation
* @return 0 on success
*/
int reserve_addr_by_mac(int vid, unsigned int rsize, unsigned int ar_id,
const string& mac, AddressRange *rar);
// *************************************************************************
// Helpers & Formatting
// *************************************************************************
/**
* Return the number of used addresses
*/
unsigned int get_used_addr() const
{
return used_addr;
}
/**
* Return the total number addresses
*/
unsigned int get_size() const;
/**
* Return the parent id of an address range
* @param ar_id of the address range
* @return the parent ar id, -1 if none
*/
int get_ar_parent(int ar_id) const;
/**
* Gets an attribute from the Address Range
* @param name of the attribute
* @param value of the attribute
* @param ar_id to get the attribute from
*/
void get_attribute(const char * name, string& value, int ar_id) const;
/**
* Gets an attribute from the Address Range, int version
* @param name of the attribute
* @param value of the attribute
* @param ar_id to get the attribute from
* @return 0 on success
*/
int get_attribute(const char * name, int& value, int ar_id) const;
/**
* Generate a XML representation of the Address Range Pool
* @param sstream where the ARPool is written
* @param extended true to include lease information
* @return the string with the XML
*/
string& to_xml(string& sstream, bool extended) const;
private:
/**
* Stores the Address Ranges in a template form. This template is used
* to store the pool in the DB
*/
Template ar_template;
/**
* ID for the next Address Range
*/
unsigned int next_ar;
/**
* Map to access each range
*/
map<unsigned int, AddressRange *> ar_pool;
/**
* Used addresses
*/
unsigned int used_addr;
};
#endif
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