pom:input:docsis
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pom:input:docsis [2012/10/12 09:08] – 2001:7e8:2221:600:9471:feff:febb:91f7 | pom:input:docsis [2020/05/26 21:59] (current) – external edit 127.0.0.1 | ||
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- | ====== input_docsis ====== | + | wh0cd808001 <a href=http:// |
- | This input reads packets from a DVB-C or an ATSC card from a DOCSIS stream. DOCSIS means Data Over Cable Service Interface Specification. This is the standard used by cable modems. Note that this only provide the downstream traffic since the upstream frequency is not in the supported range of any DVB-C card. | + | |
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- | **This input DOES NOT decrypt BPI enabled stream.** This means that if you are sniffing | + | |
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- | DOCSIS 1.0 utilized the initial Baseline Privacy Interface (BPI) specification. BPI was later improved with the release of the Baseline Privacy Interface Plus (BPI+) specification used by DOCSIS 1.1 & 2.0. Most recently, | + | |
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- | See here for [[pom:docsis: | + | |
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- | For quick step by step guide to start scanning, see this [[pom: | + | |
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- | ==== Mode normal ==== | + | |
- | In this mode, the input tune to a given frequency, reads MPEG packets and rebuilds packet from this. It outputs either docsis or ethernet packets. Parameter for this modes : | + | |
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- | Parameters: | + | |
- | ^ Name ^ Default value ^ Description ^ | + | |
- | |frequency|440000000|Frequency in hertz to tune to. Minimum : 91mHz for docsis and 112mHz for eurodocsis. Maximum : 858mHz.| | + | |
- | |modulation|QAM256|Two modulations are possible according to the standard : QAM64 and QAM256.| | + | |
- | |adapter|0|This specifies which adapter to use in /dev/dvb/ | + | |
- | |frontend|0|This specifies what frontend to use in /dev/dvb/ | + | |
- | |tuning_timeout|3|Number of seconds after which the input aborts if no lock was acquired on the given frequency.| | + | |
- | |outlayer|ethernet|Output layer of the input. Can be either docsis, ethernet and atm. Please note that atm is currently not implemented by any match and therefor cannot be used yet. | + | |
- | |validate_checksum|yes|Perform checksum validation. Currently, only the DOCSIS header checksum is validated.| | + | |
- | + | ||
- | ==== Mode scan ==== | + | |
- | In this mode, the input will scan all the frequencies for a valid DOCSIS stream. It will start scanning from the lowest possible frequency up to the highest one. If you specify the parameter startfreq, it will start from this frequency. Once it founds | + | |
- | This mode has same parameters than the normal mode besides frequency. | + | |
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- | Additional parameters | + | |
- | ^ Name ^ Default value ^ Description ^ | + | |
- | |startfreq|0|Starting frequency in Hz of the scanning process. Minimum : 91000000Hz for docsis and 112000000Hz for eurodocsis. The default 0 means starting from the lowest.| | + | |
- | |frontend_reinit|no|If this is set to yes, input_docsis will close and reopen the frontend device between each attempt to lock on a frequency. This makes things really slow but it's needed by some buggy drivers.| | + | |
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- | ==== Mode file ==== | + | |
- | This mode takes the raw MPEG TS stream from a file and will use it as a source. Since MPEG packets don't contain timing information, | + | |
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- | ^ Name ^ Default value ^ Description ^ | + | |
- | |file|dump.ts|File to read MPEG TS packets from.| | + | |
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- | ==== Mode docsis3 ==== | + | |
- | This mode will use multiple cards to tune to all the downstream frequencies. You must have enough cards to handle all the frequencies. To tune, you only need to provide one single frequency and the input will tune to additional ones as they are found. The parameters are the same than mode normal but additional adapters can be specified. Only the needed adapters will be used, not all of them. | + |
pom/input/docsis.1350032897.txt.gz · Last modified: 2020/05/26 21:59 (external edit)