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ipgpc - IP Generic Packet Classifier
The IP Generic Packet Classifier (ipgpc) module provides packet classification at the Solaris IP layer. ipgpc is an implementation of the Multi-Field (MF) classifier as described in RFC2475: An Architecture for Differentiated Services.
The classifier is configured, at startup or dynamically, using a set of "filters." Filters describe selectors that are matched against input packets that are processed by the classifier. Some selectors feature exact matching data points, while others utilize non-exact or wildcard data points.
Each filter is associated with a class describing the next actions to process a packet. There is a many-to-one (M-to-1) mapping relationship between filters and a class. Additionally, each class is aware of which filters are associated with it. A class is configured with a class name and a next action.
Unlike traditional classifiers used in edge routers, ipgpc is designed for a host or server device. A host-based classifier provides access to more resources and data than edge routers. User, project, and interface information are available at the host.
The ipgpc module exports global and per-class statistics (available through kstat:)
Global statistics:
module: ipgpc instance:<action id>
name: ipgpc global stats class: <action name>
crtime
snaptime
nbytes <number of classified bytes>
nclasses <number of classes>
nfilters <number of filters>
npackets <number of classified packets>
epackets <number of packets in error>
Per-class statistics:
module: ipgpc instance:<action id>
name: <class name> class: <action name>
crtime
snaptime
last match <time of last match>
nbytes <number of classified bytes>
npackets <number of classified packets>
/kernel/ipp/sparcv9/ipgpc
See attributes(5) for descriptions of the following attributes:
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ipqosconf(1M), dlcosmk(7ipp), dscpmk(7ipp), flowacct(7ipp), ipqos(7ipp), tokenmt(7ipp), tswtclmt(7ipp)
RFC 2475, An Architecture for Differentiated Services S. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, W. Weiss --- The Internet Society, 1998
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