metrics

package
v1.115.0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: May 15, 2026 License: MPL-2.0 Imports: 22 Imported by: 0

Documentation

Overview

Package metrics provides efficient metrics collection for NFTBan This collector replaces slow bash-based metrics with fast Go implementation

============================================================================= NFTBan v1.88 - Chain Presence Evidence Collector (M87-4) ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_chains" meta:type="package" meta:version="1.88.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-15" meta:description="Collects chain presence for Phase 1 evidence" meta:inventory.files="internal/metrics/evidence_chains.go" meta:inventory.binaries="nft" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="root"

Collects chain presence per family. Returns ChainInfo (exists bool). =============================================================================

============================================================================= NFTBan v1.88 - Correlation Engine (M87-6) ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_correlate" meta:type="package" meta:version="1.88.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-15" meta:description="Evidence correlation engine for metrics Phase 1" meta:inventory.files="internal/metrics/evidence_correlate.go" meta:inventory.binaries="" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="none"

Pure function. No exec calls. No side effects. No health derivation.

Correlation is DIAGNOSTIC only: - Cannot map to PROTECTED/DEGRADED/DOWN - Cannot influence exit codes - Cannot produce aggregate system state - Cannot be summarized as "healthy/unhealthy"

It answers: "does kernel evidence agree with validator interpretation?" =============================================================================

============================================================================= NFTBan v1.88 - Journal Evidence Collector (M88-2) ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_journal" meta:type="package" meta:version="1.88.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-16" meta:description="Collects journal-based evidence for metrics" meta:inventory.files="internal/metrics/evidence_journal.go" meta:inventory.binaries="journalctl" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="root"

Collects bounded journal evidence for LoginMon activity. Uses the same journalctl strategy as the validator (A1-1 pattern): global query, bounded window, filter in code. =============================================================================

============================================================================= NFTBan v1.88 - Set Element Evidence Collector (M87-3) ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_sets" meta:type="package" meta:version="1.88.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-15" meta:description="Collects set element counts for Phase 1 evidence" meta:inventory.files="internal/metrics/evidence_sets.go" meta:inventory.binaries="nft" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="root"

Collects per-set element counts using nft JSON output. Returns structured SetInfo (exists + count) per set. =============================================================================

============================================================================= NFTBan v1.89 - Evidence Snapshot Builder + Renderers ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_snapshot" meta:type="package" meta:version="1.89.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-15" meta:description="Builds and renders Phase 1 evidence snapshots" meta:inventory.files="internal/metrics/evidence_snapshot.go" meta:inventory.binaries="" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="root"

v1.89 INV-M-001/002: Evidence layer makes ZERO direct nft calls. All kernel data (counters, sets, chains) comes from the validator, which is the sole kernel-query authority.

Collect once → render many. Metrics report evidence; validator reports interpretation. =============================================================================

============================================================================= NFTBan v1.88 - Evidence Types (Phase 1 Canonical Model) ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_types" meta:type="package" meta:version="1.88.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-15" meta:description="Canonical evidence types for metrics Phase 1" meta:inventory.files="internal/metrics/evidence_types.go" meta:inventory.binaries="" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="none"

Types only. No collection logic. No rendering logic. Metrics report evidence; validator reports interpretation. =============================================================================

============================================================================= NFTBan v1.88 - Validator Snapshot Bridge (M87-5) ============================================================================= SPDX-License-Identifier: MPL-2.0 meta:name="evidence_validator" meta:type="package" meta:version="1.88.0" meta:owner="Antonios Voulvoulis <contact@nftban.com>" meta:created_date="2026-04-15" meta:description="Read-only bridge to validator JSON for metrics evidence" meta:inventory.files="internal/metrics/evidence_validator.go" meta:inventory.binaries="nftban-validate" meta:inventory.env_vars="" meta:inventory.config_files="" meta:inventory.systemd_units="" meta:inventory.network="" meta:inventory.privileges="root"

Read-only bridge: calls nftban-validate --json once and extracts status, module effective states, and finding codes. Metrics MUST NOT modify validator truth. This is observation only. =============================================================================

Package metrics provides Prometheus metrics for NFTBan operations This file contains application-level metrics for ban/unban operations, feed loading, sync operations, and authentication

Index

Constants

View Source 
const (
	CorrelationMatch              = "match"
	CorrelationExpectedLimitation = "expected_limitation"
	CorrelationWarning            = "warning"
	CorrelationMismatch           = "mismatch"
	CorrelationUnknown            = "unknown"
)

Correlation result values.

View Source 
const DefaultFeedStaleThreshold = 48 * time.Hour

DefaultFeedStaleThreshold is the default duration after which a feed is considered stale

View Source 
const EvidenceSchemaVersion = "1.88.0"

Variables

View Source 
var Phase1Chains = []string{
	"input", "forward", "output",
	"ddos_sanity", "ddos_penalty", "ddos_prefix", "ddos_protection",
	"portscan_detection", "http_bot_guard",
}

Phase1Chains defines the chains checked in Phase 1.

View Source 
var Phase1Sets = map[string][]string{
	"ip": {
		"blacklist_manual_ipv4", "blacklist_ipv4",
		"http_bot_suspect", "http_bot_pending", "http_bot_allow",
		"http_bot_grey", "http_bot_ban", "http_bot_emergency",
	},
	"ip6": {
		"blacklist_manual_ipv6", "blacklist_ipv6",
		"http_bot_suspect6", "http_bot_pending6", "http_bot_allow6",
		"http_bot_grey6", "http_bot_ban6", "http_bot_emergency6",
	},
}

Phase1Sets defines the sets collected in Phase 1.

View Source 
var ValidatorBinPath = constants.ValidatorBinPath

ValidatorBinPath is the validator binary path. Uses the canonical constant from internal/constants. Configurable for testing.

Functions

func CollectChainPresence added in v1.87.0 

func CollectChainPresence(ctx context.Context) map[string]ChainInfo

CollectChainPresence checks which chains exist per family. Keys use stable format: "<family>:<chain_name>". If collection fails for a family, all chains in that family are marked Unknown.

func CollectRuleCounters added in v1.40.0 

func CollectRuleCounters()

CollectRuleCounters extracts per-rule packet/byte counters from nftables Called from the sampler FULL tier. Tries named counters first (v1.41.0), falls back to anonymous counter extraction for backward compatibility.

func CollectSetElements added in v1.87.0 

func CollectSetElements(ctx context.Context) map[string]SetInfo

CollectSetElements returns element counts for Phase 1 sets. Keys use stable format: "<family>:<set_name>".

func CorrelateEvidence added in v1.87.0 

func CorrelateEvidence(
	counters map[string]CounterValue,
	sets map[string]SetInfo,
	validator *ValidatorSnapshot,
	journal *JournalEvidenceResult,
) map[string]string

CorrelateEvidence compares kernel evidence against validator interpretation. Pure function — no exec, no side effects, no state mutation.

Inputs: 

counters: from CollectNamedCounters() — may be nil
sets: from CollectSetElements() — may be nil
validator: from CollectValidatorSnapshot() — may be nil

Returns: module → correlation result

func RecordAPIRequest 

func RecordAPIRequest(endpoint, method string, statusCode int, durationSec float64)

RecordAPIRequest records an API request

func RecordAuthAttempt 

func RecordAuthAttempt(success bool)

RecordAuthAttempt records an authentication attempt

func RecordAuthFailure 

func RecordAuthFailure(reason string)

RecordAuthFailure records an authentication failure with reason

func RecordBan 

func RecordBan(source, family string)

RecordBan records a successful ban operation

func RecordBanByCountry 

func RecordBanByCountry(country string)

RecordBanByCountry records a ban for a specific country

func RecordBanEnforcementLatency added in v1.40.0 

func RecordBanEnforcementLatency(op string, latencySec float64)

RecordBanEnforcementLatency records the latency of a ban enforcement operation

func RecordBanError 

func RecordBanError(source, errorType string)

RecordBanError records a ban operation error

func RecordBanWithIP added in v1.40.0 

func RecordBanWithIP(source, family, ip string)

RecordBanWithIP records a ban and tracks start time + unique IP velocity

func RecordDDoSDetection 

func RecordDDoSDetection(attackType string)

RecordDDoSDetection records a DDoS attack detection

func RecordDDoSMitigation 

func RecordDDoSMitigation(action string)

RecordDDoSMitigation records a DDoS mitigation action

func RecordDetectionByCountry 

func RecordDetectionByCountry(country, module string)

RecordDetectionByCountry records a detection for a specific country and module

func RecordError 

func RecordError(module, errorType string)

RecordError records an error for a module

func RecordEventBusDrop 

func RecordEventBusDrop()

RecordEventBusDrop records a dropped event from the EventBus

func RecordEventGenerated added in v1.40.0 

func RecordEventGenerated(eventType string)

RecordEventGenerated records an event published to the eventbus

func RecordEventsApplied added in v1.40.0 

func RecordEventsApplied(lane string, count int)

RecordEventsApplied records operations applied to nftables via opqueue

func RecordFeedLastSuccess added in v1.40.0 

func RecordFeedLastSuccess(feedName string, mtime time.Time)

RecordFeedLastSuccess records the mtime of a successfully loaded feed file

func RecordFeedLoad 

func RecordFeedLoad(feedName string, durationSec float64, success bool)

RecordFeedLoad records a feed load operation with duration

func RecordIPCConnectionWait 

func RecordIPCConnectionWait(waitSec float64)

RecordIPCConnectionWait records time spent waiting for semaphore slot

func RecordIPCRejection 

func RecordIPCRejection(reason string)

RecordIPCRejection records an IPC connection rejection with reason Reasons: "at_capacity", "auth_failed", "read_error", "timeout"

func RecordIPCRequest 

func RecordIPCRequest(method string, success bool, latencySec float64)

RecordIPCRequest records an IPC request with its status

func RecordLoginmonBan 

func RecordLoginmonBan(family, reason string)

RecordLoginmonBan records a ban triggered by loginmon

func RecordLoginmonDetection 

func RecordLoginmonDetection(reason, service string)

RecordLoginmonDetection records a login failure detection

func RecordLoginmonDetectionLatency 

func RecordLoginmonDetectionLatency(latencySec float64)

RecordLoginmonDetectionLatency records detection processing latency

func RecordLoginmonScoreAtBan 

func RecordLoginmonScoreAtBan(score float64)

RecordLoginmonScoreAtBan records the score when a ban is triggered

func RecordNFTCLI 

func RecordNFTCLI(operation string, durationSec float64, err error)

RecordNFTCLI records an nft CLI command execution

func RecordOpQueueDrop 

func RecordOpQueueDrop(lane string)

RecordOpQueueDrop records a dropped operation due to queue backpressure lane should be "fast" (ban/unban) or "bulk" (feeds/geoban)

func RecordPortscanBan 

func RecordPortscanBan(family string)

RecordPortscanBan records a ban triggered by portscan detection

func RecordPortscanDetection 

func RecordPortscanDetection(protocol string)

RecordPortscanDetection records a port scan detection

func RecordReconciliationDuration 

func RecordReconciliationDuration(seconds float64)

RecordReconciliationDuration records the duration of a reconciliation cycle

func RecordReconciliationRun 

func RecordReconciliationRun()

RecordReconciliationRun increments the total reconciliation runs counter

func RecordSuricataBan 

func RecordSuricataBan(category, family string)

RecordSuricataBan records a ban triggered by Suricata alert

func RecordSuricataEvent 

func RecordSuricataEvent(eventType string)

RecordSuricataEvent records a Suricata event from eve.json

func RecordSuricataProcessingLatency 

func RecordSuricataProcessingLatency(latencySec float64)

RecordSuricataProcessingLatency records time from EVE event to ban action

func RecordSync 

func RecordSync(operation string, durationSec float64, success bool)

RecordSync records a sync operation with duration

func RecordSyncIPChanges 

func RecordSyncIPChanges(added, removed int)

RecordSyncIPChanges records IPs added/removed during sync

func RecordUnban 

func RecordUnban(source, family string)

RecordUnban records a successful unban operation

func RecordUnbanError 

func RecordUnbanError(source, errorType string)

RecordUnbanError records an unban operation error

func RecordUnbanWithIP added in v1.40.0 

func RecordUnbanWithIP(source, family, ip string)

RecordUnbanWithIP records an unban and observes ban duration if start time is known

func RegisterWithSampler 

func RegisterWithSampler()

RegisterWithSampler registers all nftban metrics with the global sampler's registry This should be called once during application startup

func RenderHuman added in v1.87.0 

func RenderHuman(snap *EvidenceSnapshot, w io.Writer)

RenderHuman writes operator-first human-readable output.

func RenderJSON added in v1.87.0 

func RenderJSON(snap *EvidenceSnapshot) ([]byte, error)

RenderJSON serializes the snapshot as canonical Phase 1 JSON.

func SetActiveBans 

func SetActiveBans(family, banType string, count int)

SetActiveBans sets the current number of active bans

func SetCIDRCurrentTotal 

func SetCIDRCurrentTotal(count int)

SetCIDRCurrentTotal sets the current total CIDRs loaded

func SetCIDRLimitHard 

func SetCIDRLimitHard(limit int)

SetCIDRLimitHard sets the maximum CIDRs allowed for this server tier

func SetDDoSActiveMitigations 

func SetDDoSActiveMitigations(count int)

SetDDoSActiveMitigations sets the number of currently active mitigations

func SetFeedIPsLoaded 

func SetFeedIPsLoaded(feedName, family string, count float64)

SetFeedIPsLoaded sets the number of IPs loaded from a feed

func SetIPCConnectionsActive 

func SetIPCConnectionsActive(count int)

SetIPCConnectionsActive sets the current number of active IPC connections

func SetIPCConnectionsPeak 

func SetIPCConnectionsPeak(peak int)

SetIPCConnectionsPeak sets the peak concurrent connections (high water mark)

func SetIPCSemaphoreAvailable 

func SetIPCSemaphoreAvailable(available int)

SetIPCSemaphoreAvailable sets the number of available semaphore slots

func SetLoginmonTrackedIPs 

func SetLoginmonTrackedIPs(count int)

SetLoginmonTrackedIPs sets the current number of tracked IPs

func SetMemoryBudgetBytes 

func SetMemoryBudgetBytes(bytes int64)

SetMemoryBudgetBytes sets the configured memory budget in bytes

func SetMemoryPressureLevel 

func SetMemoryPressureLevel(level int)

SetMemoryPressureLevel sets the current memory pressure level Levels: 0=normal, 1=warning, 2=high, 3=critical

func SetMemoryUsedPercent 

func SetMemoryUsedPercent(percent float64)

SetMemoryUsedPercent sets the current memory usage as a percentage of budget

func SetModuleStatus 

func SetModuleStatus(module string, enabled bool)

SetModuleStatus sets the enabled status of a module

func SetOpQueueUtilization 

func SetOpQueueUtilization(lane string, pending, capacity int64)

SetOpQueueUtilization sets the current queue utilization percentage pending = current pending operations, capacity = max queue size

func SetPermanentBansEvictable 

func SetPermanentBansEvictable(count int)

SetPermanentBansEvictable sets the number of bans eligible for cleanup

func SetPermanentBansProtected 

func SetPermanentBansProtected(count int)

SetPermanentBansProtected sets the number of bans marked as "never evict"

func SetPermanentBansTotal 

func SetPermanentBansTotal(count int)

SetPermanentBansTotal sets the total number of permanent bans tracked

func SetPortAllowRules added in v1.41.0 

func SetPortAllowRules(family, protocol string, count int)

SetPortAllowRules sets the number of port allow rules for a family and protocol

func SetPortscanTrackedIPs 

func SetPortscanTrackedIPs(count int)

SetPortscanTrackedIPs sets the current number of IPs being tracked for port scanning

func SetProtectionActive 

func SetProtectionActive(active bool)

SetProtectionActive sets whether memory protection is currently triggered

func SetProtectionFeedsSkipped 

func SetProtectionFeedsSkipped(skipped bool)

SetProtectionFeedsSkipped sets whether feeds were skipped due to memory pressure

func SetProtectionGeobanSkipped 

func SetProtectionGeobanSkipped(skipped bool)

SetProtectionGeobanSkipped sets whether geoban was skipped due to memory pressure

func SetReconciliationDrift 

func SetReconciliationDrift(setName string, drift float64)

SetReconciliationDrift sets the drift count for a specific set

func SetReconciliationLastTimestamp 

func SetReconciliationLastTimestamp(ts float64)

SetReconciliationLastTimestamp sets the timestamp of the last reconciliation

func SetSchemaErrorsTotal 

func SetSchemaErrorsTotal(count int)

SetSchemaErrorsTotal sets the number of schema errors detected

func SetSchemaValidationStatus 

func SetSchemaValidationStatus(drifted bool)

SetSchemaValidationStatus sets whether schema validation passed or failed

func SetSuricataAlertsActive 

func SetSuricataAlertsActive(count int)

SetSuricataAlertsActive sets the number of IPs being tracked from alerts

func SetSuricataEveLag 

func SetSuricataEveLag(lagSeconds float64)

SetSuricataEveLag sets the EVE log freshness (seconds since last event)

func SetWhitelistOverlapCount 

func SetWhitelistOverlapCount(count int)

SetWhitelistOverlapCount sets the number of overlapping IPs

func UpdateFeedStaleness added in v1.40.0 

func UpdateFeedStaleness(feedName string, mtime time.Time, threshold time.Duration)

UpdateFeedStaleness checks all tracked feeds and sets the stale gauge based on whether the feed file mtime is older than the threshold

Types

type AttackRateTracker added in v1.41.0 

type AttackRateTracker struct {
	// contains filtered or unexported fields
}

AttackRateTracker maintains a sliding window of attack event timestamps. Thread-safe for concurrent RecordAttack calls from EventBus subscribers.

func GetAttackRateTracker added in v1.41.0 

func GetAttackRateTracker() *AttackRateTracker

GetAttackRateTracker returns the global attack rate tracker singleton

func NewAttackRateTracker added in v1.41.0 

func NewAttackRateTracker(maxEntries int) *AttackRateTracker

NewAttackRateTracker creates a tracker with a 60-second sliding window. maxEntries caps memory usage under sustained attack (default: 10000).

func (*AttackRateTracker) Rate added in v1.41.0 

func (t *AttackRateTracker) Rate() int

Rate returns the current number of events in the sliding window.

func (*AttackRateTracker) RecordAttack added in v1.41.0 

func (t *AttackRateTracker) RecordAttack()

RecordAttack records an attack event and updates the Prometheus gauge.

func (*AttackRateTracker) RefreshGauge added in v1.41.0 

func (t *AttackRateTracker) RefreshGauge()

RefreshGauge updates the Prometheus gauge with the current rate. Called from the sampler to keep the gauge fresh even without new events.

type ChainInfo added in v1.87.0 

type ChainInfo struct {
	Exists  bool `json:"exists"`
	Unknown bool `json:"unknown,omitempty"`
}

ChainInfo holds presence information for a kernel chain. Three states: 

Exists=true, Unknown=false → confirmed present
Exists=false, Unknown=false → confirmed absent
Unknown=true → collection failure; absence not known

type Collector 

type Collector struct {
	// contains filtered or unexported fields
}

Collector efficiently gathers NFTBan metrics for Prometheus export

func NewCollector 

func NewCollector(outputFile, stateDir, logDir string) *Collector

NewCollector creates a new metrics collector

func (*Collector) Collect 

func (c *Collector) Collect() error

Collect gathers and writes all metrics to the Prometheus textfile

type ConnectionStats 

type ConnectionStats struct {
	TCP int
}

ConnectionStats represents connection statistics

type CounterValue added in v1.87.0 

type CounterValue struct {
	Packets int64 `json:"packets"`
	Bytes   int64 `json:"bytes"`
}

CounterValue holds a single named counter's packets and bytes.

type DataFreshnessResult added in v1.88.0 

type DataFreshnessResult struct {
	FeedFresh  bool   `json:"feed_fresh"`          // feed data files < 7 days old
	FeedAge    string `json:"feed_age,omitempty"`  // human-readable age of newest feed
	GeoIPFresh bool   `json:"geoip_fresh"`         // GeoIP DB < 45 days old
	GeoIPAge   string `json:"geoip_age,omitempty"` // human-readable age
	Unknown    bool   `json:"unknown,omitempty"`   // collection failed
}

DataFreshnessResult holds freshness checks for data pipeline artifacts.

func CollectDataFreshness added in v1.88.0 

func CollectDataFreshness() *DataFreshnessResult

CollectDataFreshness checks feed and GeoIP data pipeline freshness. M88-3: Feed data files in /var/lib/nftban/feeds/ — fresh if any file < 7 days M88-4: GeoIP DB at /var/lib/nftban/geoip/dbip-country-lite.mmdb — fresh if < 45 days

type EvidenceSnapshot added in v1.87.0 

type EvidenceSnapshot struct {
	SchemaVersion  string    `json:"schema_version"`
	CollectedAt    time.Time `json:"collected_at"`
	TruthAuthority string    `json:"truth_authority"`

	Kernel struct {
		Counters map[string]CounterValue `json:"counters"`
		Sets     map[string]SetInfo      `json:"sets"`
		Chains   map[string]ChainInfo    `json:"chains"`
	} `json:"kernel"`

	// v1.88: External evidence plane
	External  *JournalEvidenceResult `json:"external,omitempty"`
	Freshness *DataFreshnessResult   `json:"freshness,omitempty"`

	Validator   *ValidatorSnapshot `json:"validator"`
	Correlation map[string]string  `json:"correlation"`
}

EvidenceSnapshot is the canonical Phase 1 metrics model. Collected once, rendered as JSON or human-readable text.

This is NOT a truth object. Validator remains sole authority. Correlation is diagnostic only — cannot affect exit codes.

func CollectEvidenceSnapshot added in v1.87.0 

func CollectEvidenceSnapshot(ctx context.Context) (*EvidenceSnapshot, error)

CollectEvidenceSnapshot gathers all Phase 1 evidence. Single entry point: collect once, render many.

v1.89 INV-M-001/002: All kernel data from validator — ZERO direct nft calls. The validator runs nft -j list ruleset (once) + per-set element queries. Evidence extracts counters, chains, and set element counts from the validator's result. Journal and data freshness are independent sources.

type InterfaceStats 

type InterfaceStats struct {
	RxBytes   uint64
	RxPackets uint64
	TxBytes   uint64
	TxPackets uint64
}

InterfaceStats represents network interface statistics

type JournalEvidenceResult added in v1.88.0 

type JournalEvidenceResult struct {
	LoginMonActive bool `json:"loginmon_active"`   // recent ban/login_failed events found
	LoginMonBans   int  `json:"loginmon_bans"`     // ban event count in window
	LoginMonEvents int  `json:"loginmon_events"`   // login_failed event count in window
	Unknown        bool `json:"unknown,omitempty"` // collection failed
}

JournalEvidenceResult holds journal-based evidence for metrics.

func CollectJournalEvidence added in v1.88.0 

func CollectJournalEvidence(ctx context.Context) *JournalEvidenceResult

CollectJournalEvidence queries nftband journal for LoginMon activity. Bounded: 15m window, 500 line cap, 3s timeout.

type NamedCountersResult added in v1.87.0 

type NamedCountersResult struct {
	CollectedAt time.Time               `json:"collected_at"`
	Counters    map[string]CounterValue `json:"counters"`
}

NamedCountersResult holds all named counters from a single collection. Keys use stable format: "<family>:<counter_name>" (e.g. "ip:input_ct_ssh_drop"). An empty Counters map is valid (no counters found, not an error). A nil result with non-nil error means collection failed.

func CollectNamedCounters added in v1.87.0 

func CollectNamedCounters(ctx context.Context) (*NamedCountersResult, error)

CollectNamedCounters returns all named counters as structured evidence data. v1.87 M87-2: This is the canonical evidence collection function. Collect once → render many (JSON, human, Prometheus).

Semantics: - Empty Counters map = valid (no counters found, not an error) - Non-nil error = collection failed (command error, parse error) - Zero-valued counters are preserved (neutral, not failure)

type Sample 

type Sample struct {
	Timestamp     time.Time              `json:"timestamp"`
	Version       string                 `json:"version"`
	BlockedIPs    int                    `json:"blocked_ips"`
	RuleCount     int                    `json:"rule_count"`
	HealthOK      bool                   `json:"health_ok"`
	FeedsActive   int                    `json:"feeds_active"`
	NetworkRxMbps float64                `json:"network_rx_mbps"`
	NetworkTxMbps float64                `json:"network_tx_mbps"`
	RawData       map[string]interface{} `json:"raw_data,omitempty"`
}

Sample represents a single metrics snapshot

type Sampler 

type Sampler struct {
	// contains filtered or unexported fields
}

Sampler manages global metrics collection

func GetSampler 

func GetSampler() *Sampler

GetSampler returns the global sampler instance (singleton)

func (*Sampler) AddSession 

func (s *Sampler) AddSession()

AddSession increments active session count and starts sampling if needed

func (*Sampler) DisableMetrics 

func (s *Sampler) DisableMetrics()

DisableMetrics disables continuous sampling (back to session-based logic)

func (*Sampler) EnableMetrics 

func (s *Sampler) EnableMetrics()

EnableMetrics enables continuous sampling (overrides session-based logic)

func (*Sampler) GetRecentSamples 

func (s *Sampler) GetRecentSamples(count int) []Sample

GetRecentSamples returns the most recent N samples

func (*Sampler) GetStatus 

func (s *Sampler) GetStatus() map[string]interface{}

GetStatus returns current sampler status

func (*Sampler) IsMetricsEnabled 

func (s *Sampler) IsMetricsEnabled() bool

IsMetricsEnabled returns whether continuous metrics mode is enabled

func (*Sampler) Registry 

func (s *Sampler) Registry() *prometheus.Registry

Registry returns the Prometheus registry

func (*Sampler) RemoveSession 

func (s *Sampler) RemoveSession()

RemoveSession decrements active session count and stops sampling if needed

type SetInfo added in v1.87.0 

type SetInfo struct {
	Exists  bool `json:"exists"`
	Count   int  `json:"count"`
	Unknown bool `json:"unknown,omitempty"`
}

SetInfo holds element count for a kernel set. Three states: 

Exists=true, Count>=0, Unknown=false → collected successfully
Exists=false, Count=0, Unknown=false → confirmed absent
Unknown=true → collection failure/timeout/parse error; absence not known

type TCPStats 

type TCPStats struct {
	InSegs  uint64
	OutSegs uint64
}

TCPStats represents TCP protocol statistics

type UDPStats 

type UDPStats struct {
	InDatagrams  uint64
	OutDatagrams uint64
}

UDPStats represents UDP protocol statistics

type ValidatorSnapshot added in v1.87.0 

type ValidatorSnapshot struct {
	Status   string            `json:"status"`            // protected/idle/degraded/down/unavailable
	Modules  map[string]string `json:"modules"`           // module → effective state
	Findings []string          `json:"findings"`          // finding codes only
	Unknown  bool              `json:"unknown,omitempty"` // true if collection failed
}

ValidatorSnapshot holds extracted validator state for metrics enrichment. This is NOT a truth object — it is a read-only observation of validator output. Metrics cannot modify, override, or reinterpret these values.

func CollectValidatorSnapshot added in v1.87.0 

func CollectValidatorSnapshot(ctx context.Context) *ValidatorSnapshot

CollectValidatorSnapshot calls nftban-validate --json and extracts status, module states, and finding codes. Returns ValidatorSnapshot with Unknown=true on any failure.

DEPRECATED (v1.89): CollectEvidenceSnapshot now calls validator.ValidateKernel() directly and uses buildValidatorSnapshot() for richer extraction. This function is retained for any standalone callers but is no longer on the evidence hot path.

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.