Display Filter Reference: Van Jacobson PPP compression
Protocol field name: vjc
Versions: 3.6.0 to 4.0.3
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| Field name | Description | Type | Versions |
|---|---|---|---|
| vjc.bad_data | Non-compliant packet data | Label | 3.6.0 to 4.0.3 |
| vjc.change_mask | Change mask | Unsigned integer (1 byte) | 3.6.0 to 4.0.3 |
| vjc.change_mask.ack | TCP Acknowledgement flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.connection_number | Connection number flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.ip_id | IP ID flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.psh | TCP PSH flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.reserved | Reserved | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.seq | TCP Sequence flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.urg | TCP Urgent flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.change_mask.win | TCP Window flag | Boolean | 3.6.0 to 4.0.3 |
| vjc.checksum | TCP Checksum | Unsigned integer (2 bytes) | 3.6.0 to 4.0.3 |
| vjc.compressed | Is compressed | Boolean | 3.6.0 to 4.0.3 |
| vjc.connection_number | Connection number | Unsigned integer (1 byte) | 3.6.0 to 4.0.3 |
| vjc.delta_ack | Delta ack | Unsigned integer (2 bytes) | 3.6.0 to 4.0.3 |
| vjc.delta_ipid | Delta IP ID | Unsigned integer (2 bytes) | 3.6.0 to 4.0.3 |
| vjc.delta_seq | Delta seq | Unsigned integer (2 bytes) | 3.6.0 to 4.0.3 |
| vjc.delta_window | Delta window | Signed integer (2 bytes) | 3.6.0 to 4.0.3 |
| vjc.error | Unrecoverable dissector error | Label | 3.6.0 to 4.0.3 |
| vjc.no_connection | No saved connection found (common at capture start) | Label | 3.6.0 to 4.0.3 |
| vjc.no_connection_data | Could not find saved connection data | Label | 3.6.0 to 4.0.3 |
| vjc.no_connection_id | No connection ID and no prior connection (common at capture start) | Label | 3.6.0 to 4.0.3 |
| vjc.no_decompress | Undecoded data (impossible due to missing information) | Label | 3.6.0 to 4.0.3 |
| vjc.no_direction | Connection has no direction info, cannot decompress | Label | 3.6.0 to 4.0.3 |
| vjc.special.sawu | .... 1111 = special case for "unidirectional data transfer" | Label | 3.6.0 to 4.0.3 |
| vjc.special.swu | .... 1011 = special case for "echoed interactive traffic" | Label | 3.6.0 to 4.0.3 |
| vjc.tcp_data | TCP data | Byte sequence | 3.6.0 to 4.0.3 |
| vjc.urgent_pointer | Urgent pointer | Unsigned integer (2 bytes) | 3.6.0 to 4.0.3 |