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one/include/VirtualNetwork.h
Javier Fontán Muiños fdfe10407e Changed copyright notice
2010-02-22 18:00:30 +01:00

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2010, OpenNebula Project Leads (OpenNebula.org) */
/* */
/* 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 VIRTUAL_NETWORK_H_
#define VIRTUAL_NETWORK_H_
#include "PoolSQL.h"
#include "VirtualNetworkTemplate.h"
#include "Leases.h"
#include <vector>
#include <string>
#include <map>
#include <time.h>
#include <sstream>
using namespace std;
extern "C" int vn_select_cb (void * _vn, int num,char ** values, char ** names);
extern "C" int vn_dump_cb (void * _oss, int num, char ** values, char ** names);
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/**
* The Virtual Network class. It represents a Virtual Network at manages its leases.
* One lease is formed by one IP and one MAC address.
* MAC address are derived from IP addresses.
*/
class VirtualNetwork : public PoolObjectSQL
{
public:
/**
* Possible types of networks
*/
enum NetworkType
{
UNINITIALIZED = -1,
RANGED = 0,
FIXED = 1,
};
// *************************************************************************
// Virtual Network Public Methods
// *************************************************************************
/**
* Gets the uid of the owner of the Virtual Network
* @return uid
**/
int get_uid()
{
return uid;
}
/**
* Gets a new lease for a specific VM
* @param vid VM identifier
* @param _ip pointer to string for IP to be stored into
* @param _mac pointer to string for MAC to be stored into
* @param _bridge name of the physical bridge this VN binds to
* @return 0 if success
*/
int get_lease(int vid, string& _ip, string& _mac, string& _bridge)
{
_bridge = bridge;
return leases->get(vid,_ip,_mac);
};
/**
* Asks for an specific lease of the given virtual network
* @param vid VM identifier
* @param _ip the ip of the requested lease
* @param _mac pointer to string for MAC to be stored into
* @param _bridge name of the physical bridge this VN binds to
* @return 0 if success
*/
int set_lease(int vid, const string& _ip, string& _mac, string& _bridge)
{
_bridge = bridge;
return leases->set(vid,_ip,_mac);
};
/**
* Release previously given lease
* @param _ip IP identifying the lease
* @return 0 if success
*/
void release_lease(const string& ip)
{
return leases->release(ip);
};
/**
* Gets size of the network (used + free)
* @return number of hosts that can be fitted in this network
*/
unsigned int get_size()
{
return leases->size;
};
/**
* Function to write a Virtual Network in an output stream
*/
friend ostream& operator<<(ostream& os, VirtualNetwork& vn);
/**
* Function to print the VirtualNetwork object into a string in
* plain text
* @param str the resulting string
* @return a reference to the generated string
*/
string& to_str(string& str) const;
/**
* Function to print the VirtualNetwork object into a string in
* XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
string& to_xml(string& xml) const;
private:
// -------------------------------------------------------------------------
// Friends
// -------------------------------------------------------------------------
friend class VirtualNetworkPool;
friend int vn_select_cb (
void * _vm,
int num,
char ** values,
char ** names);
friend int vn_dump_cb (
void * _oss,
int num,
char ** values,
char ** names);
// *************************************************************************
// Virtual Network Private Attributes
// *************************************************************************
// -------------------------------------------------------------------------
// Identification variables
// -------------------------------------------------------------------------
/**
* Name of the Virtual Network
*/
string name;
/**
* Owner of the Virtual Network
*/
int uid;
// -------------------------------------------------------------------------
// Binded physical attributes
// -------------------------------------------------------------------------
/**
* Name of the bridge this VNW binds to
*/
string bridge;
// -------------------------------------------------------------------------
// Virtual Network Description
// -------------------------------------------------------------------------
/**
* Holds the type of this network
*/
NetworkType type;
/**
* Pointer to leases class, can be fixed or ranged.
* Holds information on given (and, optionally, possible) leases
*/
Leases * leases;
/**
* The Virtual Network template, holds the VNW attributes.
*/
VirtualNetworkTemplate vn_template;
// *************************************************************************
// Non persistent data members from Nebula.conf
// *************************************************************************
/**
* MAC prefix for this OpenNebula site
*/
unsigned int mac_prefix;
/**
* Default size for virtual networks
*/
int default_size;
// *************************************************************************
// DataBase implementation (Private)
// *************************************************************************
/**
* Bootstraps the database table(s) associated to the Virtual Network
*/
static void bootstrap(SqliteDB * db)
{
db->exec(VirtualNetwork::db_bootstrap);
db->exec(VirtualNetworkTemplate::db_bootstrap);
db->exec(Leases::db_bootstrap);
};
/**
* Function to unmarshall a VNW object, and associated classes.
* @param num the number of columns read from the DB
* @para names the column names
* @para vaues the column values
* @return 0 on success
*/
int unmarshall(int num, char **names, char ** values);
/**
* Function to unmarshall a VNW object into an stream in XML format.
* @param oss the output stream
* @param num the number of columns read from the DB
* @para names the column names
* @para vaues the column values
* @return 0 on success
*/
static int unmarshall(ostringstream& oss,
int num,
char ** names,
char ** values);
/**
* Function to drop VN entry in vn_pool
* @return 0 on success
*/
int vn_drop(SqliteDB * db);
// ------------------------------------------------------------------------
// Template
// ------------------------------------------------------------------------
/**
* Gets the values of a template attribute
* @param name of the attribute
* @param values of the attribute
* @return the number of values
*/
int get_template_attribute(
string& name,
vector<const Attribute*>& values) const
{
return vn_template.get(name,values);
};
/**
* Gets the values of a template attribute
* @param name of the attribute
* @param values of the attribute
* @return the number of values
*/
int get_template_attribute(
const char *name,
vector<const Attribute*>& values) const
{
string str=name;
return vn_template.get(str,values);
};
/**
* Gets a string based VN attribute
* @param name of the attribute
* @param value of the attribute (a string), will be "" if not defined
*/
void get_template_attribute(
const char * name,
string& value) const
{
string str=name;
vn_template.get(str,value);
}
/**
* Gets a string based VN attribute
* @param name of the attribute
* @param value of the attribute (an int), will be 0 if not defined
*/
void get_template_attribute(
const char * name,
int& value) const
{
string str=name;
vn_template.get(str,value);
}
/**
* Updates the template of a VNW, adding a new attribute (replacing it if
* already defined), the VN's mutex SHOULD be locked
* @param vm pointer to the virtual network object
* @param name of the new attribute
* @param value of the new attribute
* @return 0 on success
*/
int update_template_attribute(
SqliteDB * db,
string& name,
string& value)
{
SingleAttribute * sattr;
int rc;
sattr = new SingleAttribute(name,value);
rc = vn_template.replace_attribute(db,sattr);
if (rc != 0)
{
delete sattr;
}
return rc;
}
protected:
//**************************************************************************
// Constructor
//**************************************************************************
VirtualNetwork(unsigned int _mac_prefix, int _default_size);
~VirtualNetwork();
// *************************************************************************
// DataBase implementation
// *************************************************************************
enum ColNames
{
OID = 0,
UID = 1,
NAME = 2,
TYPE = 3,
BRIDGE = 4,
LIMIT = 5
};
static const char * table;
static const char * db_names;
static const char * db_bootstrap;
/**
* Reads the Virtual Network (identified with its OID) from the database.
* @param db pointer to the db
* @return 0 on success
*/
int select(SqliteDB * db);
/**
* Writes the Virtual Network and its associated template and leases in the database.
* @param db pointer to the db
* @return 0 on success
*/
int insert(SqliteDB * db);
/**
* Writes/updates the Virtual Network data fields in the database.
* @param db pointer to the db
* @return 0 on success
*/
int update(SqliteDB * db);
/**
* Deletes a VNW from the database and all its associated information:
* - VNW template
* - given leases
* @param db pointer to the db
* @return 0 on success
*/
int drop(SqliteDB * db)
{
int rc;
rc = vn_template.drop(db);
rc += leases->drop(db);
rc += vn_drop(db);
return rc;
}
/**
* Dumps the contect of a set of Host objects in the given stream
* using XML format
* @param db pointer to the db
* @param oss the output stream
* @param where string to filter the VirtualMachine objects
* @return 0 on success
*/
static int dump(SqliteDB * db, ostringstream& oss, const string& where);
};
#endif /*VIRTUAL_NETWORK_H_*/
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