mirror of
https://github.com/gravitational/teleport.git
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64 lines
1.8 KiB
Go
64 lines
1.8 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 protocol
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import (
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"bytes"
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"encoding/binary"
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"io"
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"github.com/gravitational/trace"
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mssql "github.com/microsoft/go-mssqldb"
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)
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// SQLBatch is a representation of MSServer SQL Batch packet.
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// https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-tds/f2026cd3-9a46-4a3f-9a08-f63140bcbbe3
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type SQLBatch struct {
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Packet
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// SQLText contains text batch query.
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SQLText string
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}
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func toSQLBatch(p Packet) (*SQLBatch, error) {
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if p.Type() != PacketTypeSQLBatch {
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return nil, trace.BadParameter("expected SQLBatch packet, got: %v", p.Type())
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}
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r := bytes.NewReader(p.Data())
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var headersLength uint32
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// The packet header if present only in the first packet.
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if int(p.Header().PacketID) == 1 {
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if err := binary.Read(r, binary.LittleEndian, &headersLength); err != nil {
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return nil, trace.Wrap(err)
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}
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}
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if _, err := r.Seek(int64(headersLength), io.SeekStart); err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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s, err := mssql.ParseUCS2String(p.Data()[r.Size()-int64(r.Len()):])
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if err != nil {
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return nil, trace.Wrap(err)
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}
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return &SQLBatch{
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Packet: p,
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SQLText: s,
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}, nil
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}
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