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one/include/Request.h
Ruben S. Montero 613ec63426 F #4809: Fix replication logic
2017-04-28 19:35:57 +02:00

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2016, OpenNebula Project, OpenNebula Systems */
/* */
/* 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 REQUEST_H_
#define REQUEST_H_
#include <xmlrpc-c/base.hpp>
#include <xmlrpc-c/registry.hpp>
#include "RequestManager.h"
#include "AuthRequest.h"
#include "PoolObjectSQL.h"
#include "Quotas.h"
using namespace std;
/**
* This class represents the dynamic attributes: specific for a request of the
* same method.
*/
struct RequestAttributes
{
public:
int uid; /**< id of the user */
int gid; /**< id of the user's group */
string uname; /**< name of the user */
string gname; /**< name of the user's group */
string password; /**< password of the user */
set<int> group_ids; /**< set of user's group ids */
string session; /**< Session from ONE XML-RPC API */
int req_id; /**< Request ID for log messages */
int umask; /**< User umask for new objects */
xmlrpc_c::value * retval; /**< Return value from libxmlrpc-c */
PoolObjectSQL::ObjectType resp_obj; /**< object type */
int resp_id; /**< Id of the object */
string resp_msg; /**< Additional response message */
RequestAttributes()
{
resp_obj = PoolObjectSQL::NONE;
resp_id = -1;
resp_msg = "";
};
RequestAttributes(const RequestAttributes& ra)
{
uid = ra.uid;
gid = ra.gid;
uname = ra.uname;
gname = ra.gname;
password = ra.password;
group_ids = ra.group_ids;
session = ra.session;
req_id = ra.req_id;
umask = ra.umask;
retval = ra.retval;
resp_obj = ra.resp_obj;
resp_id = ra.resp_id;
resp_msg = ra.resp_msg;
};
RequestAttributes(int _uid, int _gid, const RequestAttributes& ra)
{
uid = _uid;
gid = _gid;
password = "";
group_ids = ra.group_ids;
uname = "";
gname = "";
umask = 0;
session = ra.session;
req_id = ra.req_id;
umask = ra.umask;
retval = ra.retval;
resp_obj = PoolObjectSQL::NONE;
resp_id = -1;
resp_msg = "";
};
};
/**
* The Request Class represents the basic abstraction for the OpenNebula
* XML-RPC API. This interface must be implemented by any XML-RPC API call
*/
class Request: public xmlrpc_c::method
{
public:
/**
* Error codes for the XML-RPC API
*/
enum ErrorCode {
SUCCESS = 0x0000,
AUTHENTICATION = 0x0100,
AUTHORIZATION = 0x0200,
NO_EXISTS = 0x0400,
ACTION = 0x0800,
XML_RPC_API = 0x1000,
INTERNAL = 0x2000,
ALLOCATE = 0x4000
};
/**
* Gets a string representation for the Auth object in the
* request.
* @param ob object for the auth operation
* @return string equivalent of the object
*/
static string object_name(PoolObjectSQL::ObjectType ob);
/**
* Sets the format string to log xml-rpc method calls. The format string
* interprets the following sequences:
* %i -- request id
* %m -- method name
* %u -- user id
* %U -- user name
* %l -- param list
* %p -- user password
* %g -- group id
* %G -- group name
* %a -- auth token
* %% -- %
*/
static void set_call_log_format(const string& log_format)
{
format_str = log_format;
}
protected:
/* ---------------------------------------------------------------------- */
/* Static Request Attributes: shared among request of the same method */
/* ---------------------------------------------------------------------- */
PoolSQL * pool; /**< Pool of objects */
string method_name; /**< The name of the XML-RPC method */
PoolObjectSQL::ObjectType auth_object;/**< Auth object for the request */
AuthRequest::Operation auth_op; /**< Auth operation for the request */
set<int> hidden_params;
static string format_str;
/* ---------------------------------------------------------------------- */
/* Class Constructors */
/* ---------------------------------------------------------------------- */
Request(const string& mn, const string& signature, const string& help):
pool(0),method_name(mn)
{
_signature = signature;
_help = help;
hidden_params.clear();
};
virtual ~Request(){};
/* ---------------------------------------------------------------------- */
/* Methods to execute the request when received at the server */
/* ---------------------------------------------------------------------- */
/**
* Wraps the actual execution function by authorizing the user
* and calling the request_execute virtual function
* @param _paramlist list of XML parameters
* @param _retval value to be returned to the client
*/
virtual void execute(xmlrpc_c::paramList const& _paramList,
xmlrpc_c::value * const _retval);
/**
* Actual Execution method for the request. Must be implemented by the
* XML-RPC requests
* @param _paramlist of the XML-RPC call (complete list)
* @param att the specific request attributes
*/
virtual void request_execute(xmlrpc_c::paramList const& _paramList,
RequestAttributes& att) = 0;
/**
* Locks the requested object, gets information, and unlocks it
*
* @param pool object pool
* @param id of the object
* @param type of the object
* @param att the specific request attributes
*
* @param perms returns the object's permissions
* @param name returns the object's name
* @param throw_error send error response to client if object not found
*
* @return 0 on success, -1 otherwise
*/
int get_info(PoolSQL * pool,
int id,
PoolObjectSQL::ObjectType type,
RequestAttributes& att,
PoolObjectAuth& perms,
string& name,
bool throw_error);
/* ---------------------------------------------------------------------- */
/* Methods to send response to xml-rpc client */
/* ---------------------------------------------------------------------- */
/**
* Builds an XML-RPC response updating retval. After calling this function
* the xml-rpc excute method should return
* @param val to be returned to the client
* @param att the specific request attributes
*/
void success_response(int val, RequestAttributes& att);
/**
* Builds an XML-RPC response updating retval. After calling this function
* the xml-rpc excute method should return
* @param val string to be returned to the client
* @param att the specific request attributes
*/
void success_response(const string& val, RequestAttributes& att);
/**
* Builds an XML-RPC response updating retval. After calling this function
* the xml-rpc execute method should return
* @param val to be returned to the client
* @param att the specific request attributes
*/
void success_response(bool val, RequestAttributes& att);
/**
* Builds an XML-RPC response updating retval. After calling this function
* the xml-rpc excute method should return. A descriptive error message
* is constructed using att.resp_obj, att.resp_id and/or att.resp_msg and
* the ErrorCode
* @param ec error code for this call
* @param ra the specific request attributes
*/
void failure_response(ErrorCode ec, RequestAttributes& ra);
/**
* Builds an error response. A descriptive error message
* is constructed using att.resp_obj, att.resp_id and/or att.resp_msg and
* the ErrorCode
* @param ec error code for this call
* @param att the specific request attributes
*/
string failure_message(ErrorCode ec, RequestAttributes& att);
/* ---------------------------------------------------------------------- */
/* Authorization methods for requests */
/* ---------------------------------------------------------------------- */
/**
* Performs a basic authorization for this request using the uid/gid
* from the request. The function gets the object from the pool to get
* the public attribute and its owner. The authorization is based on
* object and type of operation for the request.
* @param oid of the object, can be -1 for objects to be created, or
* pools.
* @param att the specific request attributes
*
* @return true if the user is authorized.
*/
bool basic_authorization(int oid, RequestAttributes& att)
{
return basic_authorization(oid, auth_op, att);
};
/**
* Performs a basic authorization for this request using the uid/gid
* from the request. The function gets the object from the pool to get
* the public attribute and its owner. The authorization is based on
* object and type of operation for the request.
* @param oid of the object, can be -1 for objects to be created, or
* pools.
* @param op operation of the request.
* @param att the specific request attributes
*
* @return true if the user is authorized.
*/
bool basic_authorization(int oid, AuthRequest::Operation op,
RequestAttributes& att);
/**
* Performs a basic authorization for this request using the uid/gid
* from the request. The function gets the object from the pool to get
* the public attribute and its owner. The authorization is based on
* object and type of operation for the request.
* @param pool object pool
* @param oid of the object, can be -1 for objects to be created, or
* pools.
* @param op operation of the request.
* @param att the specific request attributes
*
* @return SUCCESS if the user is authorized.
*/
static ErrorCode basic_authorization(
PoolSQL* pool,
int oid,
AuthRequest::Operation op,
PoolObjectSQL::ObjectType auth_object,
RequestAttributes& att);
/**
* Performs a basic quota check for this request using the uid/gid
* from the request. Usage counters are updated for the user/group.
* On case of error, the failure_response return values are set
*
* @param tmpl describing the object
* @param object type of the object
* @param att the specific request attributes
*
* @return true if the user is authorized.
*/
bool quota_authorization(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att);
/**
* Performs a basic quota check for this request using the uid/gid
* from the request. Usage counters are updated for the user/group.
* On case of error, the failure_response return values is not set, instead
* the error reason is returned in error_str
*
* @param tmpl describing the object
* @param object type of the object
* @param att the specific request attributes
*
* @param error_str Error reason, if any
* @return true if the user is authorized.
*/
static bool quota_authorization(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att, string& error_str);
/**
* Performs rollback on usage counters for a previous quota check operation
* for the request.
* @param tmpl describing the object
* @param att the specific request attributes
*/
static void quota_rollback(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att);
private:
/* ---------------------------------------------------------------------- */
/* Functions to manage user and group quotas */
/* ---------------------------------------------------------------------- */
static bool user_quota_authorization(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att, string& error_str);
static bool group_quota_authorization(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att, string& error_str);
static void user_quota_rollback(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att);
static void group_quota_rollback(Template * tmpl, Quotas::QuotaType qtype,
RequestAttributes& att);
/**
* Builds an XML-RPC response updating retval. After calling this function
* the xml-rpc excute method should return
* @param ec error code for this call
* @param va string representation of the error
* @param ra the specific request attributes
*/
void failure_response(ErrorCode ec, const string& va, RequestAttributes& ra);
/**
* Logs the method invocation, including the arguments
* @param att the specific request attributes
* @param paramList list of XML parameters
* @param format_str for the log
* @param hidden_params params not to be shown
*/
static void log_method_invoked(const RequestAttributes& att,
const xmlrpc_c::paramList& paramList, const string& format_str,
const std::string& method_name, const std::set<int>& hidden_params);
/**
* Logs the method result, including the output data or error message
*
* @param att the specific request attributes
* @param method_name that produced the error
*/
static void log_result(const RequestAttributes& att,
const std::string& method_name);
/**
* Formats and adds a xmlrpc_c::value to oss.
*
* @param v value to format
* @param oss stream to write v
*/
static void log_xmlrpc_value(const xmlrpc_c::value& v, std::ostringstream& oss);
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#endif //REQUEST_H_
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