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Consolidation of multipath logic. Better system separation

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Joseph Henry 2021-09-01 21:37:49 -07:00
parent 19391858d4
commit e1af003e4f
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23 changed files with 2004 additions and 3162 deletions
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200
node/Constants.hpp
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@ -361,7 +361,7 @@
/**
* Maximum number of outgoing packets we monitor for QoS information
*/
#define ZT_QOS_MAX_OUTSTANDING_RECORDS (1024*16)
#define ZT_QOS_MAX_OUTSTANDING_RECORDS (1024 * 16)
/**
* Interval used for rate-limiting the computation of path quality estimates.
@ -403,117 +403,11 @@
/**
* All unspecified traffic is put in this bucket. Anything in a bucket with a
* smaller value is deprioritized. Anything in a bucket with a higher value is
* smaller value is de-prioritized. Anything in a bucket with a higher value is
prioritized over other traffic.
*/
#define ZT_AQM_DEFAULT_BUCKET 0
/**
* How often we emit a one-liner bond summary for each peer
*/
#define ZT_MULTIPATH_BOND_STATUS_INTERVAL 60000
/**
* How long before we consider a path to be dead in the general sense. This is
* used while searching for default or alternative paths to try in the absence
* of direct guidance from the user or a selection policy.
*/
#define ZT_MULTIPATH_DEFAULT_FAILOVER_INTERVAL 10000
/**
* How often flows are evaluated
*/
#define ZT_MULTIPATH_FLOW_CHECK_INTERVAL 10000
/**
* How long before we consider a flow to be dead and remove it from the
* policy's list.
*/
#define ZT_MULTIPATH_FLOW_EXPIRATION_INTERVAL (60000 * 5)
/**
* How often a flow's statistical counters are reset
*/
#define ZT_FLOW_STATS_RESET_INTERVAL ZT_MULTIPATH_FLOW_EXPIRATION_INTERVAL
/**
* Maximum number of flows allowed before we start forcibly forgetting old ones
*/
#define ZT_FLOW_MAX_COUNT (1024*64)
/**
* How often flows are rebalanced across link (if at all)
*/
#define ZT_FLOW_MIN_REBALANCE_INTERVAL 5000
/**
* How often flows are rebalanced across link (if at all)
*/
#define ZT_FLOW_REBALANCE_INTERVAL 5000
/**
* A defensive timer to prevent path quality metrics from being
* processed too often.
*/
#define ZT_BOND_BACKGROUND_TASK_MIN_INTERVAL ZT_CORE_TIMER_TASK_GRANULARITY
/**
* How often a bonding policy's background tasks are processed,
* some need more frequent attention than others.
*/
#define ZT_MULTIPATH_ACTIVE_BACKUP_CHECK_INTERVAL ZT_CORE_TIMER_TASK_GRANULARITY
/**
* Minimum amount of time (since a previous transition) before the active-backup bonding
* policy is allowed to transition to a different link. Only valid for active-backup.
*/
#define ZT_MULTIPATH_MIN_ACTIVE_BACKUP_AUTOFLOP_INTERVAL 10000
/**
* How often a peer checks that incoming (and outgoing) traffic on a bonded link is
* appropriately paired.
*/
#define ZT_PATH_NEGOTIATION_CHECK_INTERVAL 15000
/**
* Time horizon for path negotiation paths cutoff
*/
#define ZT_PATH_NEGOTIATION_CUTOFF_TIME 60000
/**
* Maximum number of path negotiations within cutoff time
*
* This limits response to PATH_NEGOTIATION to CUTOFF_LIMIT responses
* per CUTOFF_TIME milliseconds per peer to prevent this from being
* useful for DOS amplification attacks.
*/
#define ZT_PATH_NEGOTIATION_CUTOFF_LIMIT 8
/**
* How many times a peer will attempt to petition another peer to synchronize its
* traffic to the same path before giving up and surrendering to the other peer's preference.
*/
#define ZT_PATH_NEGOTIATION_TRY_COUNT 3
/**
* How much greater the quality of a path should be before an
* optimization procedure triggers a switch.
*/
#define ZT_MULTIPATH_ACTIVE_BACKUP_OPTIMIZE_MIN_THRESHOLD 0.10
/**
* Artificially inflates the failover score for paths which meet
* certain non-performance-related policy ranking criteria.
*/
#define ZT_MULTIPATH_FAILOVER_HANDICAP_PREFERRED 500
#define ZT_MULTIPATH_FAILOVER_HANDICAP_PRIMARY 1000
#define ZT_MULTIPATH_FAILOVER_HANDICAP_NEGOTIATED 5000
/**
* An indicator that no flow is to be associated with the given packet
*/
#define ZT_QOS_NO_FLOW -1
/**
* Timeout for overall peer activity (measured from last receive)
*/
@ -604,8 +498,8 @@
#define ZT_ACK_CUTOFF_LIMIT 128
#define ZT_ACK_DRAINAGE_DIVISOR (1000 / ZT_ACK_CUTOFF_LIMIT)
#define ZT_MULTIPATH_DEFAULT_REFRCTORY_PERIOD 8000
#define ZT_MULTIPATH_MAX_REFRACTORY_PERIOD 600000
#define ZT_BOND_DEFAULT_REFRCTORY_PERIOD 8000
#define ZT_BOND_MAX_REFRACTORY_PERIOD 600000
/**
* Maximum number of direct path pushes within cutoff time
@ -641,6 +535,92 @@
*/
#define ZT_PEER_GENERAL_RATE_LIMIT 1000
/**
* Minimum allowed amount of time between flow/path optimizations (anti-flapping)
*/
#define ZT_BOND_OPTIMIZE_INTERVAL 15000
/**
* Maximum number of flows allowed before we start forcibly forgetting old ones
*/
#define ZT_FLOW_MAX_COUNT (1024 * 64)
/**
* How often we emit a bond summary for each bond
*/
#define ZT_BOND_STATUS_INTERVAL 3000
/**
* How long before we consider a path to be dead in the general sense. This is
* used while searching for default or alternative paths to try in the absence
* of direct guidance from the user or a selection policy.
*/
#define ZT_BOND_FAILOVER_DEFAULT_INTERVAL 5000
/**
* Anything below this value gets into thrashing territory since we divide
* this value by ZT_BOND_ECHOS_PER_FAILOVER_INTERVAL to send ECHOs often.
*/
#define ZT_BOND_FAILOVER_MIN_INTERVAL 250
/**
* How many times per failover interval that an ECHO is sent. This should be
* at least 2. Anything more then 4 starts to increase overhead significantly.
*/
#define ZT_BOND_ECHOS_PER_FAILOVER_INTERVAL 4
/**
* A defensive timer to prevent path quality metrics from being
* processed too often.
*/
#define ZT_BOND_BACKGROUND_TASK_MIN_INTERVAL ZT_CORE_TIMER_TASK_GRANULARITY
/**
* How often a bonding policy's background tasks are processed,
* some need more frequent attention than others.
*/
#define ZT_BOND_ACTIVE_BACKUP_CHECK_INTERVAL ZT_CORE_TIMER_TASK_GRANULARITY
/**
* Time horizon for path negotiation paths cutoff
*/
#define ZT_PATH_NEGOTIATION_CUTOFF_TIME 60000
/**
* Maximum number of path negotiations within cutoff time
*
* This limits response to PATH_NEGOTIATION to CUTOFF_LIMIT responses
* per CUTOFF_TIME milliseconds per peer to prevent this from being
* useful for DOS amplification attacks.
*/
#define ZT_PATH_NEGOTIATION_CUTOFF_LIMIT 8
/**
* How many times a peer will attempt to petition another peer to synchronize its
* traffic to the same path before giving up and surrendering to the other peer's preference.
*/
#define ZT_PATH_NEGOTIATION_TRY_COUNT 3
/**
* How much greater the quality of a path should be before an
* optimization procedure triggers a switch.
*/
#define ZT_BOND_ACTIVE_BACKUP_OPTIMIZE_MIN_THRESHOLD 0.10
/**
* Artificially inflates the failover score for paths which meet
* certain non-performance-related policy ranking criteria.
*/
#define ZT_BOND_FAILOVER_HANDICAP_PREFERRED 500
#define ZT_BOND_FAILOVER_HANDICAP_PRIMARY 1000
#define ZT_BOND_FAILOVER_HANDICAP_NEGOTIATED 5000
/**
* An indicator that no flow is to be associated with the given packet
*/
#define ZT_QOS_NO_FLOW -1
/**
* Don't do expensive identity validation more often than this
*