mirror of
https://github.com/gravitational/teleport.git
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83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package database
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import (
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"context"
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"database/sql"
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"net"
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"net/url"
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"strconv"
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"strings"
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"github.com/gravitational/trace"
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_ "github.com/microsoft/go-mssqldb"
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"github.com/gravitational/teleport/lib/defaults"
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)
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// SQLServerPinger implements the DatabasePinger interface for the SQL Server
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// protocol.
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type SQLServerPinger struct{}
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// Ping tests the connection to the Database with a simple request.
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func (p *SQLServerPinger) Ping(ctx context.Context, params PingParams) error {
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if err := params.CheckAndSetDefaults(defaults.ProtocolPostgres); err != nil {
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return trace.Wrap(err)
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}
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query := url.Values{}
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query.Add("database", params.DatabaseName)
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u := &url.URL{
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Scheme: "sqlserver",
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User: url.User(params.Username),
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Host: net.JoinHostPort(params.Host, strconv.Itoa(params.Port)),
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RawQuery: query.Encode(),
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}
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db, err := sql.Open("sqlserver", u.String())
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if err != nil {
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return trace.Wrap(err)
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}
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defer db.Close()
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err = db.PingContext(ctx)
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if err != nil {
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return trace.Wrap(err)
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}
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return nil
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}
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// IsConnectionRefusedError returns whether the error is referring to a connection refused.
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func (p *SQLServerPinger) IsConnectionRefusedError(err error) bool {
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return strings.Contains(err.Error(), "unable to open tcp connection with host")
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}
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// IsInvalidDatabaseUserError returns whether the error is referring to an invalid (non-existent) user.
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func (p *SQLServerPinger) IsInvalidDatabaseUserError(err error) bool {
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return strings.Contains(err.Error(), "authentication failed")
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}
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// IsInvalidDatabaseNameError returns whether the error is referring to an invalid (non-existent) database name.
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func (p *SQLServerPinger) IsInvalidDatabaseNameError(err error) bool {
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return strings.Contains(err.Error(), "Cannot open database")
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}
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