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Fix #300 support tcp option data length larger than 128 #301

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Fix #300 support tcp option data length larger than 128 #301

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7e05ee4
#300 tcp option support data length larger than 128
gaoxingliang Sep 5, 2022
8247242
#300 tcp option support data length larger than 128
gaoxingliang Sep 5, 2022
602b625
#300 tcp option support data length larger than 128
gaoxingliang Sep 5, 2022
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4 changes: 2 additions & 2 deletions pcap4j-core/src/main/java/org/pcap4j/packet/UnknownTcpOption.java
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Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@ private UnknownTcpOption(byte[] rawData, int offset, int length) throws IllegalR

this.kind = TcpOptionKind.getInstance(rawData[offset]);
this.length = rawData[1 + offset];
if (length < this.length) {
if (length < getLengthAsInt()) {
StringBuilder sb = new StringBuilder(100);
sb.append("The raw data is too short to build this option(")
.append(this.length)
Expand All @@ -68,7 +68,7 @@ private UnknownTcpOption(byte[] rawData, int offset, int length) throws IllegalR
throw new IllegalRawDataException(sb.toString());
}

if (this.length > 2) this.data = ByteArrays.getSubArray(rawData, 2 + offset, this.length - 2);
if (this.length > 2) this.data = ByteArrays.getSubArray(rawData, 2 + offset, getLengthAsInt() - 2);
else this.data = new byte[] {};
}

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