/usr/share/gocode/src/github.com/go-sql-driver/mysql/packets_test.go is in golang-github-go-sql-driver-mysql-dev 1.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 | // Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2016 The Go-MySQL-Driver Authors. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package mysql
import (
"database/sql/driver"
"errors"
"net"
"testing"
"time"
)
var (
errConnClosed = errors.New("connection is closed")
errConnTooManyReads = errors.New("too many reads")
errConnTooManyWrites = errors.New("too many writes")
)
// struct to mock a net.Conn for testing purposes
type mockConn struct {
laddr net.Addr
raddr net.Addr
data []byte
closed bool
read int
written int
reads int
writes int
maxReads int
maxWrites int
}
func (m *mockConn) Read(b []byte) (n int, err error) {
if m.closed {
return 0, errConnClosed
}
m.reads++
if m.maxReads > 0 && m.reads > m.maxReads {
return 0, errConnTooManyReads
}
n = copy(b, m.data)
m.read += n
m.data = m.data[n:]
return
}
func (m *mockConn) Write(b []byte) (n int, err error) {
if m.closed {
return 0, errConnClosed
}
m.writes++
if m.maxWrites > 0 && m.writes > m.maxWrites {
return 0, errConnTooManyWrites
}
n = len(b)
m.written += n
return
}
func (m *mockConn) Close() error {
m.closed = true
return nil
}
func (m *mockConn) LocalAddr() net.Addr {
return m.laddr
}
func (m *mockConn) RemoteAddr() net.Addr {
return m.raddr
}
func (m *mockConn) SetDeadline(t time.Time) error {
return nil
}
func (m *mockConn) SetReadDeadline(t time.Time) error {
return nil
}
func (m *mockConn) SetWriteDeadline(t time.Time) error {
return nil
}
// make sure mockConn implements the net.Conn interface
var _ net.Conn = new(mockConn)
func TestReadPacketSingleByte(t *testing.T) {
conn := new(mockConn)
mc := &mysqlConn{
buf: newBuffer(conn),
}
conn.data = []byte{0x01, 0x00, 0x00, 0x00, 0xff}
conn.maxReads = 1
packet, err := mc.readPacket()
if err != nil {
t.Fatal(err)
}
if len(packet) != 1 {
t.Fatalf("unexpected packet lenght: expected %d, got %d", 1, len(packet))
}
if packet[0] != 0xff {
t.Fatalf("unexpected packet content: expected %x, got %x", 0xff, packet[0])
}
}
func TestReadPacketWrongSequenceID(t *testing.T) {
conn := new(mockConn)
mc := &mysqlConn{
buf: newBuffer(conn),
}
// too low sequence id
conn.data = []byte{0x01, 0x00, 0x00, 0x00, 0xff}
conn.maxReads = 1
mc.sequence = 1
_, err := mc.readPacket()
if err != ErrPktSync {
t.Errorf("expected ErrPktSync, got %v", err)
}
// reset
conn.reads = 0
mc.sequence = 0
mc.buf = newBuffer(conn)
// too high sequence id
conn.data = []byte{0x01, 0x00, 0x00, 0x42, 0xff}
_, err = mc.readPacket()
if err != ErrPktSyncMul {
t.Errorf("expected ErrPktSyncMul, got %v", err)
}
}
func TestReadPacketSplit(t *testing.T) {
conn := new(mockConn)
mc := &mysqlConn{
buf: newBuffer(conn),
}
data := make([]byte, maxPacketSize*2+4*3)
const pkt2ofs = maxPacketSize + 4
const pkt3ofs = 2 * (maxPacketSize + 4)
// case 1: payload has length maxPacketSize
data = data[:pkt2ofs+4]
// 1st packet has maxPacketSize length and sequence id 0
// ff ff ff 00 ...
data[0] = 0xff
data[1] = 0xff
data[2] = 0xff
// mark the payload start and end of 1st packet so that we can check if the
// content was correctly appended
data[4] = 0x11
data[maxPacketSize+3] = 0x22
// 2nd packet has payload length 0 and squence id 1
// 00 00 00 01
data[pkt2ofs+3] = 0x01
conn.data = data
conn.maxReads = 3
packet, err := mc.readPacket()
if err != nil {
t.Fatal(err)
}
if len(packet) != maxPacketSize {
t.Fatalf("unexpected packet lenght: expected %d, got %d", maxPacketSize, len(packet))
}
if packet[0] != 0x11 {
t.Fatalf("unexpected payload start: expected %x, got %x", 0x11, packet[0])
}
if packet[maxPacketSize-1] != 0x22 {
t.Fatalf("unexpected payload end: expected %x, got %x", 0x22, packet[maxPacketSize-1])
}
// case 2: payload has length which is a multiple of maxPacketSize
data = data[:cap(data)]
// 2nd packet now has maxPacketSize length
data[pkt2ofs] = 0xff
data[pkt2ofs+1] = 0xff
data[pkt2ofs+2] = 0xff
// mark the payload start and end of the 2nd packet
data[pkt2ofs+4] = 0x33
data[pkt2ofs+maxPacketSize+3] = 0x44
// 3rd packet has payload length 0 and squence id 2
// 00 00 00 02
data[pkt3ofs+3] = 0x02
conn.data = data
conn.reads = 0
conn.maxReads = 5
mc.sequence = 0
packet, err = mc.readPacket()
if err != nil {
t.Fatal(err)
}
if len(packet) != 2*maxPacketSize {
t.Fatalf("unexpected packet lenght: expected %d, got %d", 2*maxPacketSize, len(packet))
}
if packet[0] != 0x11 {
t.Fatalf("unexpected payload start: expected %x, got %x", 0x11, packet[0])
}
if packet[2*maxPacketSize-1] != 0x44 {
t.Fatalf("unexpected payload end: expected %x, got %x", 0x44, packet[2*maxPacketSize-1])
}
// case 3: payload has a length larger maxPacketSize, which is not an exact
// multiple of it
data = data[:pkt2ofs+4+42]
data[pkt2ofs] = 0x2a
data[pkt2ofs+1] = 0x00
data[pkt2ofs+2] = 0x00
data[pkt2ofs+4+41] = 0x44
conn.data = data
conn.reads = 0
conn.maxReads = 4
mc.sequence = 0
packet, err = mc.readPacket()
if err != nil {
t.Fatal(err)
}
if len(packet) != maxPacketSize+42 {
t.Fatalf("unexpected packet lenght: expected %d, got %d", maxPacketSize+42, len(packet))
}
if packet[0] != 0x11 {
t.Fatalf("unexpected payload start: expected %x, got %x", 0x11, packet[0])
}
if packet[maxPacketSize+41] != 0x44 {
t.Fatalf("unexpected payload end: expected %x, got %x", 0x44, packet[maxPacketSize+41])
}
}
func TestReadPacketFail(t *testing.T) {
conn := new(mockConn)
mc := &mysqlConn{
buf: newBuffer(conn),
}
// illegal empty (stand-alone) packet
conn.data = []byte{0x00, 0x00, 0x00, 0x00}
conn.maxReads = 1
_, err := mc.readPacket()
if err != driver.ErrBadConn {
t.Errorf("expected ErrBadConn, got %v", err)
}
// reset
conn.reads = 0
mc.sequence = 0
mc.buf = newBuffer(conn)
// fail to read header
conn.closed = true
_, err = mc.readPacket()
if err != driver.ErrBadConn {
t.Errorf("expected ErrBadConn, got %v", err)
}
// reset
conn.closed = false
conn.reads = 0
mc.sequence = 0
mc.buf = newBuffer(conn)
// fail to read body
conn.maxReads = 1
_, err = mc.readPacket()
if err != driver.ErrBadConn {
t.Errorf("expected ErrBadConn, got %v", err)
}
}
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