flowtrack
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Documentation¶
Overview¶
Package flowtrack contains types for tracking TCP/UDP flows by 4-tuples.
Index¶
Constants¶
This section is empty.
Variables¶
This section is empty.
Functions¶
This section is empty.
Types¶
typeCache¶
type Cache[Valueany] struct {// MaxEntries is the maximum number of cache entries before// an item is evicted. Zero means no limit.MaxEntriesint// contains filtered or unexported fields}
Cache is an LRU cache keyed by Tuple.
The zero value is valid to use.
It is not safe for concurrent access.
func (*Cache[Value])Add¶
Add adds a value to the cache, set or updating its associatedvalue.
If MaxEntries is non-zero and the length of the cache is greaterafter any addition, the least recently used value is evicted.
func (*Cache[Value])Get¶
Get looks up a key's value from the cache, also reportingwhether it was present.
func (*Cache[Value])RemoveOldest¶
func (c *Cache[Value]) RemoveOldest()
RemoveOldest removes the oldest item from the cache, if any.
typeTuple¶
type Tuple struct {// contains filtered or unexported fields}Tuple is a 5-tuple of proto, source and destination IP and port.
This struct originally used netip.AddrPort, but that was about twice as slowwhen used as a map key due to the alignment and extra space for the IPv6 zonepointers (unneeded for all our current 2024-06-17 flowtrack needs).
This struct is packed optimally and doesn't contain gaps or pointers.
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