Convert tcp flag accessors to u8 to support filtering #59
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Very small change: cast
booltou8in accessor methods for TCP flags. This allows for filtering on TCP flag values at the packet level by specifying "tcp.flag = 0 | 1" (e.g., "tcp.syn = 1").This is a workaround to changing the filtering language to support boolean values for protocol fields (e.g., "tcp.syn = true" and "tcp.syn" would not work in filters).
Addresses #46