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authorEvgeny S Maksimov <me@vragam.net>2019-01-28 23:44:12 +0300
committerEvgeny S Maksimov <me@vragam.net>2019-01-28 23:44:12 +0300
commitcbddcd311a777f0fbe1dcea4105b01ef0ffa4e34 (patch)
tree8d40a5358840b386f0a1f0b2d6110c9893c676f4 /src/org
parent95285d6f8c93d4a9c8e03d634b0a503695fe4449 (diff)
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Message type parser refactoring
Diffstat (limited to 'src/org')
-rw-r--r--src/org/traccar/protocol/NavisProtocolDecoder.java137
1 files changed, 76 insertions, 61 deletions
diff --git a/src/org/traccar/protocol/NavisProtocolDecoder.java b/src/org/traccar/protocol/NavisProtocolDecoder.java
index 65c425053..decfae63f 100644
--- a/src/org/traccar/protocol/NavisProtocolDecoder.java
+++ b/src/org/traccar/protocol/NavisProtocolDecoder.java
@@ -649,82 +649,97 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
}
}
- @Override
- protected Object decode(
- Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+ private Object decodeNtcb(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
- ByteBuf buf = (ByteBuf) msg;
+ prefix = buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII);
+ buf.skipBytes(prefix.length()); // Prefix @NTC by default
+ serverId = buf.readUnsignedIntLE();
+ deviceUniqueId = buf.readUnsignedIntLE();
+ int length = buf.readUnsignedShortLE();
+ buf.skipBytes(2); // Header and data XOR checksum
- if (buf.getByte(buf.readerIndex()) == 0x7F) {
- // FLEX keep alive message
- return null;
- } else if (buf.getByte(buf.readerIndex()) == 0x7E) { // "~"
- // FLEX message
- try {
- DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
- if (deviceSession != null) {
- switch (buf.readShortLE()) {
- // FLEX 1.0
- case 0x417E: // "~A"
- return processFlexArray(this::parseFlexPosition, "~A", deviceSession, channel, buf);
- case 0x547E: // "~T"
- return processFlexSingle(this::parseFlexPosition, "~T", deviceSession, channel, buf);
- case 0x437E: // "~C"
- return processFlexSingle(this::parseFlexPosition, "~C", deviceSession, channel, buf);
- // FLEX 2.0 (Extra packages)
- case 0x457E: // "~E"
- return processFlexArray(this::parseFlex20Position, "~E", deviceSession, channel, buf);
- case 0x587E: // "~X"
- return processFlexSingle(this::parseFlex20Position, "~X", deviceSession, channel, buf);
+ if (length == 0) {
+ return null; // Keep alive message
+ }
+
+ String type = buf.toString(buf.readerIndex(), 3, StandardCharsets.US_ASCII);
+ buf.skipBytes(type.length());
+
+ if (type.equals("*>S")) {
+ return processHandshake(channel, remoteAddress, buf);
+ } else {
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession != null) {
+ try {
+ switch (type) {
+ case "*>A":
+ return processNtcbArray(deviceSession, channel, buf);
+ case "*>T":
+ return processNtcbSingle(deviceSession, channel, buf);
+ case "*>F": // "*>FLEX"
+ buf.skipBytes(3);
+ return processFlexNegotiation(channel, buf);
default:
break;
}
+ } catch (IndexOutOfBoundsException error) {
+ LOGGER.warn("Navis NTCB message parsing error", error);
}
- } catch (IndexOutOfBoundsException error) {
- LOGGER.warn("Navis FLEX message parsing error", error);
- }
- } else {
- // NTCB message
- prefix = buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII);
- buf.skipBytes(prefix.length()); // Prefix @NTC by default
- serverId = buf.readUnsignedIntLE();
- deviceUniqueId = buf.readUnsignedIntLE();
- int length = buf.readUnsignedShortLE();
- buf.skipBytes(2); // Header and data XOR checksum
-
- if (length == 0) {
- return null; // Keep alive message
}
+ }
- int type = buf.getIntLE(buf.readerIndex());
- buf.skipBytes(3);
- if ((type & 0xFFFFFF) == 0x533E2AL) { // "*>S"
- return processHandshake(channel, remoteAddress, buf);
- } else {
- DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
- if (deviceSession != null) {
- try {
- switch (type & 0xFFFFFF) {
- case 0x413E2A: // "*>A"
- return processNtcbArray(deviceSession, channel, buf);
- case 0x543E2A: // "*>T"
- return processNtcbSingle(deviceSession, channel, buf);
- case 0x463E2A: // "*>F" (*>FLEX)
- buf.skipBytes(3);
- return processFlexNegotiation(channel, buf);
- default:
- break;
- }
- } catch (IndexOutOfBoundsException error) {
- LOGGER.warn("Navis NTCB message parsing error", error);
- }
+ return null;
+ }
+
+ private Object decodeFlex(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+ String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
+ buf.skipBytes(type.length());
+
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession != null) {
+ try {
+ switch (type) {
+ // FLEX 1.0
+ case "~A":
+ return processFlexArray(this::parseFlexPosition, type, deviceSession, channel, buf);
+ case "~T":
+ case "~C":
+ return processFlexSingle(this::parseFlexPosition, type, deviceSession, channel, buf);
+ // FLEX 2.0 (Extra packages)
+ case "~E":
+ return processFlexArray(this::parseFlex20Position, type, deviceSession, channel, buf);
+ case "~X":
+ return processFlexSingle(this::parseFlex20Position, type, deviceSession, channel, buf);
+ default:
+ break;
}
+ } catch (IndexOutOfBoundsException error) {
+ LOGGER.warn("Navis FLEX message parsing error", error);
}
}
return null;
}
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ if (buf.getByte(buf.readerIndex()) == 0x7F) {
+ // FLEX keep alive message
+ return null;
+ }
+
+ if (flexDataSize > 0) {
+ return decodeFlex(channel, remoteAddress, buf);
+ } else {
+ return decodeNtcb(channel, remoteAddress, buf);
+ }
+ }
+
public int getFlexDataSize() {
return flexDataSize;
}