Display Filter Reference: Van Jacobson PPP compression
Protocol field name: vjc
Versions: 3.6.0 to 4.2.5
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| Field name | Description | Type | Versions |
|---|---|---|---|
| vjc | Non-compliant packet data | Label | 3.6.0 to 4.2.5 |
| vjc | Change mask | Unsigned integer (8 bits) | 3.6.0 to 4.2.5 |
| vjc | TCP Acknowledgement flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | Connection number flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | IP ID flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | TCP PSH flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | Reserved | Boolean | 3.6.0 to 4.2.5 |
| vjc | TCP Sequence flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | TCP Urgent flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | TCP Window flag | Boolean | 3.6.0 to 4.2.5 |
| vjc | TCP Checksum | Unsigned integer (16 bits) | 3.6.0 to 4.2.5 |
| vjc | Is compressed | Boolean | 3.6.0 to 4.2.5 |
| vjc | Connection number | Unsigned integer (8 bits) | 3.6.0 to 4.2.5 |
| vjc | Delta ack | Unsigned integer (16 bits) | 3.6.0 to 4.2.5 |
| vjc | Delta IP ID | Unsigned integer (16 bits) | 3.6.0 to 4.2.5 |
| vjc | Delta seq | Unsigned integer (16 bits) | 3.6.0 to 4.2.5 |
| vjc | Delta window | Signed integer (16 bits) | 3.6.0 to 4.2.5 |
| vjc | Unrecoverable dissector error | Label | 3.6.0 to 4.2.5 |
| vjc | No saved connection found (common at capture start) | Label | 3.6.0 to 4.2.5 |
| vjc | Could not find saved connection data | Label | 3.6.0 to 4.2.5 |
| vjc | No connection ID and no prior connection (common at capture start) | Label | 3.6.0 to 4.2.5 |
| vjc | Undecoded data (impossible due to missing information) | Label | 3.6.0 to 4.2.5 |
| vjc | Connection has no direction info, cannot decompress | Label | 3.6.0 to 4.2.5 |
| vjc | .... 1111 = special case for "unidirectional data transfer" | Label | 3.6.0 to 4.2.5 |
| vjc | .... 1011 = special case for "echoed interactive traffic" | Label | 3.6.0 to 4.2.5 |
| vjc | TCP data | Byte sequence | 3.6.0 to 4.2.5 |
| vjc | Urgent pointer | Unsigned integer (16 bits) | 3.6.0 to 4.2.5 |