@jsprismarine/raknet
Version:
Basic RakNet implementation written in TypeScript
101 lines (98 loc) • 14 kB
JavaScript
import BinaryStream from '@jsprismarine/jsbinaryutils';
import { BitFlags } from './BitFlags.es.js';
import { FrameReliability } from './FrameReliability.es.js';
import assert from 'assert';
const MAX_FRAME_BYTE_LENGTH = 23;
class Frame {
reliability = FrameReliability.UNRELIABLE;
reliableIndex = null;
sequenceIndex = null;
orderIndex = null;
orderChannel;
fragmentSize = 0;
fragmentId;
fragmentIndex;
content;
fromBinary(stream) {
const header = stream.readByte();
this.reliability = (header & 224) >> 5;
const length = Math.ceil(stream.readShort() / 8);
if (this.isReliable()) {
this.reliableIndex = stream.readTriadLE();
}
if (this.isSequenced()) {
this.sequenceIndex = stream.readTriadLE();
}
if (this.isOrdered()) {
this.orderIndex = stream.readTriadLE();
this.orderChannel = stream.readByte();
}
if ((header & BitFlags.SPLIT) > 0) {
this.fragmentSize = stream.readInt();
this.fragmentId = stream.readShort();
this.fragmentIndex = stream.readInt();
}
this.content = stream.read(length);
return this;
}
toBinary() {
const stream = new BinaryStream();
const fragmented = this.isFragmented();
stream.writeByte(this.reliability << 5 | (fragmented ? BitFlags.SPLIT : 0));
stream.writeUnsignedShort(this.content.byteLength << 3);
if (this.isReliable()) {
assert(typeof this.reliableIndex === "number", "Invalid ReliableIndex for reliable Frame");
stream.writeUnsignedTriadLE(this.reliableIndex);
}
if (this.isSequenced()) {
assert(typeof this.sequenceIndex === "number", "Invalid SequenceIndex for sequenced Frame");
stream.writeUnsignedTriadLE(this.sequenceIndex);
}
if (this.isOrdered()) {
assert(typeof this.orderIndex === "number", "Invalid OrderIndex for ordered Frame");
stream.writeUnsignedTriadLE(this.orderIndex);
assert(typeof this.orderChannel === "number", "Invalid OrderChannel for ordered FrameSet");
stream.writeByte(this.orderChannel);
}
if (fragmented) {
stream.writeUnsignedInt(this.fragmentSize);
stream.writeUnsignedShort(this.fragmentId);
stream.writeUnsignedInt(this.fragmentIndex);
}
stream.write(this.content);
return stream;
}
getByteLength() {
return 3 + this.content.byteLength + (this.isReliable() ? 3 : 0) + (this.isSequenced() ? 3 : 0) + (this.isOrdered() ? 4 : 0) + (this.isFragmented() ? 10 : 0);
}
isReliable() {
return [
FrameReliability.RELIABLE,
FrameReliability.RELIABLE_ORDERED,
FrameReliability.RELIABLE_SEQUENCED,
FrameReliability.RELIABLE_WITH_ACK_RECEIPT,
FrameReliability.RELIABLE_ORDERED_WITH_ACK_RECEIPT
].includes(this.reliability);
}
isSequenced() {
return [FrameReliability.RELIABLE_SEQUENCED, FrameReliability.UNRELIABLE_SEQUENCED].includes(this.reliability);
}
isOrdered() {
return [
FrameReliability.UNRELIABLE_SEQUENCED,
FrameReliability.RELIABLE_ORDERED,
FrameReliability.RELIABLE_SEQUENCED,
FrameReliability.RELIABLE_ORDERED_WITH_ACK_RECEIPT
].includes(this.reliability);
}
isOrderedExclusive() {
return [FrameReliability.RELIABLE_ORDERED, FrameReliability.RELIABLE_ORDERED_WITH_ACK_RECEIPT].includes(
this.reliability
);
}
isFragmented() {
return this.fragmentSize > 0;
}
}
export { MAX_FRAME_BYTE_LENGTH, Frame as default };
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"Frame.es.js","sources":["../../src/protocol/Frame.ts"],"sourcesContent":["import BinaryStream from '@jsprismarine/jsbinaryutils';\nimport BitFlags from './BitFlags';\nimport FrameReliability from './FrameReliability';\nimport assert from 'assert';\n\n// https://github.com/facebookarchive/RakNet/blob/1a169895a900c9fc4841c556e16514182b75faf8/Source/ReliabilityLayer.cpp#L133\n// It's the maximum number of bytes a frameset can take. 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BitFlags.SPLIT : 0));\n        stream.writeUnsignedShort(this.content.byteLength << 3);\n\n        if (this.isReliable()) {\n            assert(typeof this.reliableIndex === 'number', 'Invalid ReliableIndex for reliable Frame');\n            stream.writeUnsignedTriadLE(this.reliableIndex);\n        }\n\n        if (this.isSequenced()) {\n            assert(typeof this.sequenceIndex === 'number', 'Invalid SequenceIndex for sequenced Frame');\n            stream.writeUnsignedTriadLE(this.sequenceIndex);\n        }\n\n        if (this.isOrdered()) {\n            assert(typeof this.orderIndex === 'number', 'Invalid OrderIndex for ordered Frame');\n            stream.writeUnsignedTriadLE(this.orderIndex);\n            assert(typeof this.orderChannel === 'number', 'Invalid OrderChannel for ordered FrameSet');\n            stream.writeByte(this.orderChannel);\n        }\n\n        if (fragmented) {\n            stream.writeUnsignedInt(this.fragmentSize);\n            stream.writeUnsignedShort(this.fragmentId);\n            stream.writeUnsignedInt(this.fragmentIndex);\n        }\n\n        stream.write(this.content);\n        return stream;\n    }\n\n    public getByteLength(): number {\n        return (\n            3 +\n            this.content.byteLength +\n            (this.isReliable() ? 3 : 0) +\n            (this.isSequenced() ? 3 : 0) +\n            (this.isOrdered() ? 4 : 0) +\n            (this.isFragmented() ? 10 : 0)\n        );\n    }\n\n    public isReliable(): boolean {\n        return [\n            FrameReliability.RELIABLE,\n            FrameReliability.RELIABLE_ORDERED,\n            FrameReliability.RELIABLE_SEQUENCED,\n            FrameReliability.RELIABLE_WITH_ACK_RECEIPT,\n            FrameReliability.RELIABLE_ORDERED_WITH_ACK_RECEIPT\n        ].includes(this.reliability);\n    }\n\n    public isSequenced(): boolean {\n        return [FrameReliability.RELIABLE_SEQUENCED, FrameReliability.UNRELIABLE_SEQUENCED].includes(this.reliability);\n    }\n\n    public isOrdered(): boolean {\n        return [\n            FrameReliability.UNRELIABLE_SEQUENCED,\n            FrameReliability.RELIABLE_ORDERED,\n            FrameReliability.RELIABLE_SEQUENCED,\n            FrameReliability.RELIABLE_ORDERED_WITH_ACK_RECEIPT\n        ].includes(this.reliability);\n    }\n\n    public isOrderedExclusive(): boolean {\n        return [FrameReliability.RELIABLE_ORDERED, FrameReliability.RELIABLE_ORDERED_WITH_ACK_RECEIPT].includes(\n            this.reliability\n        );\n    }\n\n    public isFragmented(): boolean {\n        return this.fragmentSize > 0;\n    }\n}\n"],"names":[],"mappings":";;;;;AAOO,MAAM,qBAAwB,GAAA;AAErC,MAAqB,KAAM,CAAA;AAAA,EAChB,cAAc,gBAAiB,CAAA,UAAA;AAAA,EAE/B,aAA+B,GAAA,IAAA;AAAA,EAE/B,aAA+B,GAAA,IAAA;AAAA,EAE/B,UAA4B,GAAA,IAAA;AAAA,EAC5B,YAAA;AAAA,EAEA,YAAe,GAAA,CAAA;AAAA,EACf,UAAA;AAAA,EACA,aAAA;AAAA,EAEA,OAAA;AAAA,EAEA,WAAW,MAA6B,EAAA;AAC3C,IAAM,MAAA,MAAA,GAAS,OAAO,QAAS,EAAA;AAC/B,IAAK,IAAA,CAAA,WAAA,GAAA,CAAe,SAAS,GAAS,KAAA,CAAA;AAGtC,IAAA,MAAM,SAAS,IAAK,CAAA,IAAA,CAAK,MAAO,CAAA,SAAA,KAAc,CAAC,CAAA;AAE/C,IAAI,IAAA,IAAA,CAAK,YAAc,EAAA;AACnB,MAAK,IAAA,CAAA,aAAA,GAAgB,OAAO,WAAY,EAAA;AAAA;AAG5C,IAAI,IAAA,IAAA,CAAK,aAAe,EAAA;AACpB,MAAK,IAAA,CAAA,aAAA,GAAgB,OAAO,WAAY,EAAA;AAAA;AAG5C,IAAI,IAAA,IAAA,CAAK,WAAa,EAAA;AAClB,MAAK,IAAA,CAAA,UAAA,GAAa,OAAO,WAAY,EAAA;AACrC,MAAK,IAAA,CAAA,YAAA,GAAe,OAAO,QAAS,EAAA;AAAA;AAGxC,IAAK,IAAA,CAAA,MAAA,GAAS,QAAS,CAAA,KAAA,IAAS,CAAG,EAAA;AAC/B,MAAK,IAAA,CAAA,YAAA,GAAe,OAAO,OAAQ,EAAA;AACnC,MAAK,IAAA,CAAA,UAAA,GAAa,OAAO,SAAU,EAAA;AACnC,MAAK,IAAA,CAAA,aAAA,GAAgB,OAAO,OAAQ,EAAA;AAAA;AAGxC,IAAK,IAAA,CAAA,OAAA,GAAU,MAAO,CAAA,IAAA,CAAK,MAAM,CAAA;AACjC,IAAO,OAAA,IAAA;AAAA;AACX,EAEO,QAAyB,GAAA;AAC5B,IAAM,MAAA,MAAA,GAAS,IAAI,YAAa,EAAA;AAChC,IAAM,MAAA,UAAA,GAAa,KAAK,YAAa,EAAA;AAErC,IAAA,MAAA,CAAO,UAAW,IAAK,CAAA,WAAA,IAAe,KAAM,UAAa,GAAA,QAAA,CAAS,QAAQ,CAAE,CAAA,CAAA;AAC5E,IAAA,MAAA,CAAO,kBAAmB,CAAA,IAAA,CAAK,OAAQ,CAAA,UAAA,IAAc,CAAC,CAAA;AAEtD,IAAI,IAAA,IAAA,CAAK,YAAc,EAAA;AACnB,MAAA,MAAA,CAAO,OAAO,IAAA,CAAK,aAAkB,KAAA,QAAA,EAAU,0CAA0C,CAAA;AACzF,MAAO,MAAA,CAAA,oBAAA,CAAqB,KAAK,aAAa,CAAA;AAAA;AAGlD,IAAI,IAAA,IAAA,CAAK,aAAe,EAAA;AACpB,MAAA,MAAA,CAAO,OAAO,IAAA,CAAK,aAAkB,KAAA,QAAA,EAAU,2CAA2C,CAAA;AAC1F,MAAO,MAAA,CAAA,oBAAA,CAAqB,KAAK,aAAa,CAAA;AAAA;AAGlD,IAAI,IAAA,IAAA,CAAK,WAAa,EAAA;AAClB,MAAA,MAAA,CAAO,OAAO,IAAA,CAAK,UAAe,KAAA,QAAA,EAAU,sCAAsC,CAAA;AAClF,MAAO,MAAA,CAAA,oBAAA,CAAqB,KAAK,UAAU,CAAA;AAC3C,MAAA,MAAA,CAAO,OAAO,IAAA,CAAK,YAAiB,KAAA,QAAA,EAAU,2CAA2C,CAAA;AACzF,MAAO,MAAA,CAAA,SAAA,CAAU,KAAK,YAAY,CAAA;AAAA;AAGtC,IAAA,IAAI,UAAY,EAAA;AACZ,MAAO,MAAA,CAAA,gBAAA,CAAiB,KAAK,YAAY,CAAA;AACzC,MAAO,MAAA,CAAA,kBAAA,CAAmB,KAAK,UAAU,CAAA;AACzC,MAAO,MAAA,CAAA,gBAAA,CAAiB,KAAK,aAAa,CAAA;AAAA;AAG9C,IAAO,MAAA,CAAA,KAAA,CAAM,KAAK,OAAO,CAAA;AACzB,IAAO,OAAA,MAAA;AAAA;AACX,EAEO,aAAwB,GAAA;AAC3B,IACI,OAAA,CAAA,GACA,KAAK,OAAQ,CAAA,UAAA,IACZ,KAAK,UAAW,EAAA,GAAI,CAAI,GAAA,CAAA,CAAA,IACxB,IAAK,CAAA,WAAA,KAAgB,CAAI,GAAA,CAAA,CAAA,IACzB,KAAK,SAAU,EAAA,GAAI,IAAI,CACvB,CAAA,IAAA,IAAA,CAAK,YAAa,EAAA,GAAI,EAAK,GAAA,CAAA,CAAA;AAAA;AAEpC,EAEO,UAAsB,GAAA;AACzB,IAAO,OAAA;AAAA,MACH,gBAAiB,CAAA,QAAA;AAAA,MACjB,gBAAiB,CAAA,gBAAA;AAAA,MACjB,gBAAiB,CAAA,kBAAA;AAAA,MACjB,gBAAiB,CAAA,yBAAA;AAAA,MACjB,gBAAiB,CAAA;AAAA,KACrB,CAAE,QAAS,CAAA,IAAA,CAAK,WAAW,CAAA;AAAA;AAC/B,EAEO,WAAuB,GAAA;AAC1B,IAAO,OAAA,CAAC,iBAAiB,kBAAoB,EAAA,gBAAA,CAAiB,oBAAoB,CAAE,CAAA,QAAA,CAAS,KAAK,WAAW,CAAA;AAAA;AACjH,EAEO,SAAqB,GAAA;AACxB,IAAO,OAAA;AAAA,MACH,gBAAiB,CAAA,oBAAA;AAAA,MACjB,gBAAiB,CAAA,gBAAA;AAAA,MACjB,gBAAiB,CAAA,kBAAA;AAAA,MACjB,gBAAiB,CAAA;AAAA,KACrB,CAAE,QAAS,CAAA,IAAA,CAAK,WAAW,CAAA;AAAA;AAC/B,EAEO,kBAA8B,GAAA;AACjC,IAAA,OAAO,CAAC,gBAAA,CAAiB,gBAAkB,EAAA,gBAAA,CAAiB,iCAAiC,CAAE,CAAA,QAAA;AAAA,MAC3F,IAAK,CAAA;AAAA,KACT;AAAA;AACJ,EAEO,YAAwB,GAAA;AAC3B,IAAA,OAAO,KAAK,YAAe,GAAA,CAAA;AAAA;AAEnC;;;;"}