mirror of
https://github.com/OpenNebula/one.git
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413 lines
12 KiB
C++
413 lines
12 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2010, OpenNebula Project Leads (OpenNebula.org) */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------- */
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#ifndef VIRTUAL_NETWORK_H_
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#define VIRTUAL_NETWORK_H_
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#include "PoolSQL.h"
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#include "VirtualNetworkTemplate.h"
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#include "Leases.h"
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#include <vector>
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#include <string>
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#include <map>
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#include <time.h>
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#include <sstream>
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using namespace std;
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/* -------------------------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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/**
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* The Virtual Network class. It represents a Virtual Network at manages its leases.
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* One lease is formed by one IP and one MAC address.
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* MAC address are derived from IP addresses.
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*/
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class VirtualNetwork : public PoolObjectSQL
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{
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public:
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/**
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* Possible types of networks
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*/
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enum NetworkType
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{
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UNINITIALIZED = -1,
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RANGED = 0,
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FIXED = 1,
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};
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// *************************************************************************
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// Virtual Network Public Methods
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// *************************************************************************
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/**
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* Gets the uid of the owner of the Virtual Network
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* @return uid
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**/
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int get_uid()
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{
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return uid;
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}
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/**
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* Gets a new lease for a specific VM
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* @param vid VM identifier
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* @param _ip pointer to string for IP to be stored into
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* @param _mac pointer to string for MAC to be stored into
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* @param _bridge name of the physical bridge this VN binds to
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* @return 0 if success
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*/
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int get_lease(int vid, string& _ip, string& _mac, string& _bridge)
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{
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_bridge = bridge;
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return leases->get(vid,_ip,_mac);
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};
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/**
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* Asks for an specific lease of the given virtual network
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* @param vid VM identifier
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* @param _ip the ip of the requested lease
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* @param _mac pointer to string for MAC to be stored into
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* @param _bridge name of the physical bridge this VN binds to
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* @return 0 if success
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*/
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int set_lease(int vid, const string& _ip, string& _mac, string& _bridge)
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{
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_bridge = bridge;
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return leases->set(vid,_ip,_mac);
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};
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/**
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* Release previously given lease
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* @param _ip IP identifying the lease
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* @return 0 if success
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*/
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void release_lease(const string& ip)
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{
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return leases->release(ip);
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};
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/**
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* Gets size of the network (used + free)
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* @return number of hosts that can be fitted in this network
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*/
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unsigned int get_size()
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{
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return leases->size;
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};
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/**
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* Function to write a Virtual Network in an output stream
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*/
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friend ostream& operator<<(ostream& os, VirtualNetwork& vn);
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/**
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* Function to print the VirtualNetwork object into a string in
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* plain text
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* @param str the resulting string
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* @return a reference to the generated string
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*/
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string& to_str(string& str) const;
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/**
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* Function to print the VirtualNetwork object into a string in
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* XML format
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* @param xml the resulting XML string
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* @return a reference to the generated string
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*/
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string& to_xml(string& xml) const;
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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class VirtualNetworkPool;
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// *************************************************************************
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// Virtual Network Private Attributes
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// *************************************************************************
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// -------------------------------------------------------------------------
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// Identification variables
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// -------------------------------------------------------------------------
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/**
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* Name of the Virtual Network
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*/
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string name;
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/**
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* Owner of the Virtual Network
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*/
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int uid;
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// -------------------------------------------------------------------------
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// Binded physical attributes
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// -------------------------------------------------------------------------
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/**
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* Name of the bridge this VNW binds to
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*/
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string bridge;
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// -------------------------------------------------------------------------
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// Virtual Network Description
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// -------------------------------------------------------------------------
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/**
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* Holds the type of this network
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*/
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NetworkType type;
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/**
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* Pointer to leases class, can be fixed or ranged.
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* Holds information on given (and, optionally, possible) leases
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*/
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Leases * leases;
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/**
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* The Virtual Network template, holds the VNW attributes.
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*/
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VirtualNetworkTemplate vn_template;
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// *************************************************************************
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// Non persistent data members from Nebula.conf
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// *************************************************************************
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/**
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* MAC prefix for this OpenNebula site
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*/
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unsigned int mac_prefix;
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/**
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* Default size for virtual networks
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*/
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int default_size;
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// *************************************************************************
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// DataBase implementation (Private)
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// *************************************************************************
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/**
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* Execute an INSERT or REPLACE Sql query.
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* @param db The SQL DB
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* @param replace Execute an INSERT or a REPLACE
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* @return 0 on success
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*/
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int insert_replace(SqlDB *db, bool replace);
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/**
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* Bootstraps the database table(s) associated to the Virtual Network
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*/
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static void bootstrap(SqlDB * db)
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{
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ostringstream oss_vnet(VirtualNetwork::db_bootstrap);
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ostringstream oss_templ(VirtualNetworkTemplate::db_bootstrap);
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ostringstream oss_lease(Leases::db_bootstrap);
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db->exec(oss_vnet);
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db->exec(oss_templ);
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db->exec(oss_lease);
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};
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/**
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* Callback function to unmarshall a VNW object (VirtualNetwork::select)
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* @param num the number of columns read from the DB
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* @param names the column names
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* @param vaues the column values
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* @return 0 on success
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*/
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int select_cb(void * nil, int num, char **values, char **names);
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/**
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* Function to drop VN entry in vn_pool
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* @return 0 on success
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*/
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int vn_drop(SqlDB * db);
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// ------------------------------------------------------------------------
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// Template
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// ------------------------------------------------------------------------
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/**
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* Gets the values of a template attribute
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* @param name of the attribute
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* @param values of the attribute
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* @return the number of values
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*/
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int get_template_attribute(
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string& name,
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vector<const Attribute*>& values) const
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{
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return vn_template.get(name,values);
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};
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/**
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* Gets the values of a template attribute
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* @param name of the attribute
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* @param values of the attribute
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* @return the number of values
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*/
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int get_template_attribute(
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const char *name,
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vector<const Attribute*>& values) const
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{
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string str=name;
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return vn_template.get(str,values);
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};
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/**
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* Gets a string based VN attribute
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* @param name of the attribute
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* @param value of the attribute (a string), will be "" if not defined
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*/
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void get_template_attribute(
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const char * name,
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string& value) const
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{
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string str=name;
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vn_template.get(str,value);
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}
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/**
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* Gets a string based VN attribute
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* @param name of the attribute
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* @param value of the attribute (an int), will be 0 if not defined
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*/
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void get_template_attribute(
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const char * name,
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int& value) const
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{
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string str=name;
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vn_template.get(str,value);
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}
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/**
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* Updates the template of a VNW, adding a new attribute (replacing it if
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* already defined), the VN's mutex SHOULD be locked
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* @param db pointer to the DB
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* @param name of the new attribute
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* @param value of the new attribute
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* @return 0 on success
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*/
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int update_template_attribute(
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SqlDB * db,
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string& name,
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string& value)
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{
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SingleAttribute * sattr;
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int rc;
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sattr = new SingleAttribute(name,value);
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rc = vn_template.replace_attribute(db,sattr);
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if (rc != 0)
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{
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delete sattr;
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}
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return rc;
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}
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protected:
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//**************************************************************************
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// Constructor
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//**************************************************************************
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VirtualNetwork(unsigned int _mac_prefix, int _default_size);
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~VirtualNetwork();
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// *************************************************************************
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// DataBase implementation
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// *************************************************************************
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enum ColNames
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{
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OID = 0,
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UID = 1,
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NAME = 2,
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TYPE = 3,
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BRIDGE = 4,
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LIMIT = 5
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};
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static const char * table;
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static const char * db_names;
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static const char * db_bootstrap;
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/**
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* Reads the Virtual Network (identified with its OID) from the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int select(SqlDB * db);
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/**
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* Writes the Virtual Network and its associated template and leases in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int insert(SqlDB * db);
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/**
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* Writes/updates the Virtual Network data fields in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int update(SqlDB * db);
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/**
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* Deletes a VNW from the database and all its associated information:
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* - VNW template
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* - given leases
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* @param db pointer to the db
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* @return 0 on success
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*/
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int drop(SqlDB * db)
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{
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int rc;
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rc = vn_template.drop(db);
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rc += leases->drop(db);
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rc += vn_drop(db);
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return rc;
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}
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/**
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* Dumps the contect of a VirtualNetwork object in the given stream using
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* XML format
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* @param oss the output stream
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* @param num the number of columns read from the DB
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* @param names the column names
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* @param vaues the column values
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* @return 0 on success
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*/
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static int dump(ostringstream& oss, int num, char **values, char **names);
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};
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#endif /*VIRTUAL_NETWORK_H_*/
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