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Serialize text size on 4 bytes

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This will allow to send text having a size greater than 65535 bytes.
This commit is contained in:
Romain Vimont 2020-06-04 21:42:09 +02:00
parent d91c5dcfd5
commit 245999aec4
10 changed files with 40 additions and 36 deletions
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6
app/src/control_msg.c
View file

@ -20,9 +20,9 @@ write_position(uint8_t *buf, const struct position *position) {
static size_t
write_string(const char *utf8, size_t max_len, unsigned char *buf) {
size_t len = utf8_truncation_index(utf8, max_len);
buffer_write16be(buf, (uint16_t) len);
memcpy(&buf[2], utf8, len);
return 2 + len;
buffer_write32be(buf, len);
memcpy(&buf[4], utf8, len);
return 4 + len;
}
static uint16_t

4
app/src/control_msg.h
View file

@ -13,8 +13,8 @@
#define CONTROL_MSG_MAX_SIZE 4096
#define CONTROL_MSG_INJECT_TEXT_MAX_LENGTH 300
// type: 1 byte; paste flag: 1 byte; length: 2 bytes
#define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH (CONTROL_MSG_MAX_SIZE - 4)
// type: 1 byte; paste flag: 1 byte; length: 4 bytes
#define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH (CONTROL_MSG_MAX_SIZE - 6)
#define POINTER_ID_MOUSE UINT64_C(-1);

10
app/src/device_msg.c
View file

@ -9,7 +9,7 @@
ssize_t
device_msg_deserialize(const unsigned char *buf, size_t len,
struct device_msg *msg) {
if (len < 3) {
if (len < 5) {
// at least type + empty string length
return 0; // not available
}
@ -17,8 +17,8 @@ device_msg_deserialize(const unsigned char *buf, size_t len,
msg->type = buf[0];
switch (msg->type) {
case DEVICE_MSG_TYPE_CLIPBOARD: {
uint16_t clipboard_len = buffer_read16be(&buf[1]);
if (clipboard_len > len - 3) {
size_t clipboard_len = buffer_read32be(&buf[1]);
if (clipboard_len > len - 5) {
return 0; // not available
}
char *text = SDL_malloc(clipboard_len + 1);
@ -27,12 +27,12 @@ device_msg_deserialize(const unsigned char *buf, size_t len,
return -1;
}
if (clipboard_len) {
memcpy(text, &buf[3], clipboard_len);
memcpy(text, &buf[5], clipboard_len);
}
text[clipboard_len] = '\0';
msg->clipboard.text = text;
return 3 + clipboard_len;
return 5 + clipboard_len;
}
default:
LOGW("Unknown device message type: %d", (int) msg->type);

4
app/src/device_msg.h
View file

@ -8,8 +8,8 @@
#include "config.h"
#define DEVICE_MSG_MAX_SIZE 4096
// type: 1 byte; length: 2 bytes
#define DEVICE_MSG_TEXT_MAX_LENGTH (DEVICE_MSG_MAX_SIZE - 3)
// type: 1 byte; length: 4 bytes
#define DEVICE_MSG_TEXT_MAX_LENGTH (DEVICE_MSG_MAX_SIZE - 5)
enum device_msg_type {
DEVICE_MSG_TYPE_CLIPBOARD,

20
app/tests/test_control_msg_serialize.c
View file

@ -36,11 +36,11 @@ static void test_serialize_inject_text(void) {
unsigned char buf[CONTROL_MSG_MAX_SIZE];
int size = control_msg_serialize(&msg, buf);
assert(size == 16);
assert(size == 18);
const unsigned char expected[] = {
CONTROL_MSG_TYPE_INJECT_TEXT,
0x00, 0x0d, // text length
0x00, 0x00, 0x00, 0x0d, // text length
'h', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '!', // text
};
assert(!memcmp(buf, expected, sizeof(expected)));
@ -56,13 +56,15 @@ static void test_serialize_inject_text_long(void) {
unsigned char buf[CONTROL_MSG_MAX_SIZE];
int size = control_msg_serialize(&msg, buf);
assert(size == 3 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
assert(size == 5 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
unsigned char expected[3 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH];
unsigned char expected[5 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH];
expected[0] = CONTROL_MSG_TYPE_INJECT_TEXT;
expected[1] = 0x01;
expected[2] = 0x2c; // text length (16 bits)
memset(&expected[3], 'a', CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
expected[1] = 0x00;
expected[2] = 0x00;
expected[3] = 0x01;
expected[4] = 0x2c; // text length (32 bits)
memset(&expected[5], 'a', CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
assert(!memcmp(buf, expected, sizeof(expected)));
}
@ -208,12 +210,12 @@ static void test_serialize_set_clipboard(void) {
unsigned char buf[CONTROL_MSG_MAX_SIZE];
int size = control_msg_serialize(&msg, buf);
assert(size == 17);
assert(size == 19);
const unsigned char expected[] = {
CONTROL_MSG_TYPE_SET_CLIPBOARD,
1, // paste
0x00, 0x0d, // text length
0x00, 0x00, 0x00, 0x0d, // text length
'h', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '!', // text
};
assert(!memcmp(buf, expected, sizeof(expected)));

12
app/tests/test_device_msg_deserialize.c
View file

@ -8,13 +8,13 @@
static void test_deserialize_clipboard(void) {
const unsigned char input[] = {
DEVICE_MSG_TYPE_CLIPBOARD,
0x00, 0x03, // text length
0x00, 0x00, 0x00, 0x03, // text length
0x41, 0x42, 0x43, // "ABC"
};
struct device_msg msg;
ssize_t r = device_msg_deserialize(input, sizeof(input), &msg);
assert(r == 6);
assert(r == 8);
assert(msg.type == DEVICE_MSG_TYPE_CLIPBOARD);
assert(msg.clipboard.text);
@ -26,10 +26,12 @@ static void test_deserialize_clipboard(void) {
static void test_deserialize_clipboard_big(void) {
unsigned char input[DEVICE_MSG_MAX_SIZE];
input[0] = DEVICE_MSG_TYPE_CLIPBOARD;
input[1] = DEVICE_MSG_TEXT_MAX_LENGTH >> 8; // MSB
input[2] = DEVICE_MSG_TEXT_MAX_LENGTH & 0xff; // LSB
input[1] = (DEVICE_MSG_TEXT_MAX_LENGTH & 0xff000000u) >> 24;
input[2] = (DEVICE_MSG_TEXT_MAX_LENGTH & 0x00ff0000u) >> 16;
input[3] = (DEVICE_MSG_TEXT_MAX_LENGTH & 0x0000ff00u) >> 8;
input[4] = DEVICE_MSG_TEXT_MAX_LENGTH & 0x000000ffu;
memset(input + 3, 'a', DEVICE_MSG_TEXT_MAX_LENGTH);
memset(input + 5, 'a', DEVICE_MSG_TEXT_MAX_LENGTH);
struct device_msg msg;
ssize_t r = device_msg_deserialize(input, sizeof(input), &msg);

6
server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java
View file

@ -16,7 +16,7 @@ public class ControlMessageReader {
private static final int MESSAGE_MAX_SIZE = 4096;
public static final int CLIPBOARD_TEXT_MAX_LENGTH = MESSAGE_MAX_SIZE - 4; // type: 1 byte; paste flag: 1 byte; length: 2 bytes
public static final int CLIPBOARD_TEXT_MAX_LENGTH = MESSAGE_MAX_SIZE - 6; // type: 1 byte; paste flag: 1 byte; length: 4 bytes
public static final int INJECT_TEXT_MAX_LENGTH = 300;
private final byte[] rawBuffer = new byte[MESSAGE_MAX_SIZE];
@ -103,10 +103,10 @@ public class ControlMessageReader {
}
private String parseString() {
if (buffer.remaining() < 2) {
if (buffer.remaining() < 4) {
return null;
}
int len = toUnsigned(buffer.getShort());
int len = buffer.getInt();
if (buffer.remaining() < len) {
return null;
}

4
server/src/main/java/com/genymobile/scrcpy/DeviceMessageWriter.java
View file

@ -8,7 +8,7 @@ import java.nio.charset.StandardCharsets;
public class DeviceMessageWriter {
private static final int MESSAGE_MAX_SIZE = 4096;
public static final int CLIPBOARD_TEXT_MAX_LENGTH = MESSAGE_MAX_SIZE - 3; // type: 1 byte; length: 2 bytes
public static final int CLIPBOARD_TEXT_MAX_LENGTH = MESSAGE_MAX_SIZE - 5; // type: 1 byte; length: 4 bytes
private final byte[] rawBuffer = new byte[MESSAGE_MAX_SIZE];
private final ByteBuffer buffer = ByteBuffer.wrap(rawBuffer);
@ -21,7 +21,7 @@ public class DeviceMessageWriter {
String text = msg.getText();
byte[] raw = text.getBytes(StandardCharsets.UTF_8);
int len = StringUtils.getUtf8TruncationIndex(raw, CLIPBOARD_TEXT_MAX_LENGTH);
buffer.putShort((short) len);
buffer.putInt(len);
buffer.put(raw, 0, len);
output.write(rawBuffer, 0, buffer.position());
break;

8
server/src/test/java/com/genymobile/scrcpy/ControlMessageReaderTest.java
View file

@ -48,7 +48,7 @@ public class ControlMessageReaderTest {
DataOutputStream dos = new DataOutputStream(bos);
dos.writeByte(ControlMessage.TYPE_INJECT_TEXT);
byte[] text = "testé".getBytes(StandardCharsets.UTF_8);
dos.writeShort(text.length);
dos.writeInt(text.length);
dos.write(text);
byte[] packet = bos.toByteArray();
@ -68,7 +68,7 @@ public class ControlMessageReaderTest {
dos.writeByte(ControlMessage.TYPE_INJECT_TEXT);
byte[] text = new byte[ControlMessageReader.INJECT_TEXT_MAX_LENGTH];
Arrays.fill(text, (byte) 'a');
dos.writeShort(text.length);
dos.writeInt(text.length);
dos.write(text);
byte[] packet = bos.toByteArray();
@ -218,7 +218,7 @@ public class ControlMessageReaderTest {
dos.writeByte(ControlMessage.TYPE_SET_CLIPBOARD);
dos.writeByte(1); // paste
byte[] text = "testé".getBytes(StandardCharsets.UTF_8);
dos.writeShort(text.length);
dos.writeInt(text.length);
dos.write(text);
byte[] packet = bos.toByteArray();
@ -246,7 +246,7 @@ public class ControlMessageReaderTest {
Arrays.fill(rawText, (byte) 'a');
String text = new String(rawText, 0, rawText.length);
dos.writeShort(rawText.length);
dos.writeInt(rawText.length);
dos.write(rawText);
byte[] packet = bos.toByteArray();

2
server/src/test/java/com/genymobile/scrcpy/DeviceMessageWriterTest.java
View file

@ -19,7 +19,7 @@ public class DeviceMessageWriterTest {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
dos.writeByte(DeviceMessage.TYPE_CLIPBOARD);
dos.writeShort(data.length);
dos.writeInt(data.length);
dos.write(data);
byte[] expected = bos.toByteArray();