    # File lib/fog/aws/requests/rds/authorize_db_security_group_ingress.rb, line 35
            def authorize_db_security_group_ingress(name, opts = {})
              unless opts.key?('CIDRIP') || (opts.key?('EC2SecurityGroupName') && opts.key?('EC2SecurityGroupOwnerId'))
                raise ArgumentError, 'Must specify CIDRIP, or both EC2SecurityGroupName and EC2SecurityGroupOwnerId'
              end

              response = Excon::Response.new

              if sec_group = self.data[:security_groups][name]
                if opts.key?('CIDRIP')
                  if sec_group['IPRanges'].detect{|h| h['CIDRIP'] == opts['CIDRIP']}
                    raise Fog::AWS::RDS::AuthorizationAlreadyExists.new("AuthorizationAlreadyExists => #{opts['CIDRIP']} is alreay defined")
                  end
                  sec_group['IPRanges'] << opts.merge({"Status" => 'authorizing'})
                else
                  if sec_group['EC2SecurityGroups'].detect{|h| h['EC2SecurityGroupName'] == opts['EC2SecurityGroupName']}
                    raise Fog::AWS::RDS::AuthorizationAlreadyExists.new("AuthorizationAlreadyExists => #{opts['EC2SecurityGroupName']} is alreay defined")
                  end
                  sec_group['EC2SecurityGroups'] << opts.merge({"Status" => 'authorizing'})
                end
                response.status = 200
                response.body = {
                  "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id },
                  'AuthorizeDBSecurityGroupIngressResult' => {
                    'DBSecurityGroup' => sec_group
                  }
                }
                response
              else
                raise Fog::AWS::RDS::NotFound.new("DBSecurityGroupNotFound => #{name} not found")
              end

            end