Private/AzStackHci.Constants.ps1

# ////////////////////////////////////////////////////////////////////////////
# Strict Mode v1 (PS 5.1 safe) - surfaces reads of uninitialised variables at runtime.
Set-StrictMode -Version 1.0

# Module Constants
# Centralized configuration values for the AzStackHci.DiagnosticSettings module.
# All constant numbers and hardcoded values are defined here for easy maintenance.
# ////////////////////////////////////////////////////////////////////////////

# --- Memory Dump Settings ---
# Default dedicated dump file size for systems with less than the large memory threshold
[uint32]$script:DUMP_FILE_SIZE_DEFAULT_MIB = 65536        # 64 GiB

# Dedicated dump file size for large memory systems (>= $LARGE_MEMORY_THRESHOLD_BYTES)
[uint32]$script:DUMP_FILE_SIZE_LARGE_MIB = 131072         # 128 GiB

# RAM threshold (in bytes) above which the large dump file size is used
[uint64]$script:LARGE_MEMORY_THRESHOLD_BYTES = 768GB

# Disk space reserve percentage for dedicated dump file validation
[double]$script:DUMP_DISK_RESERVE_PERCENT = 0.1           # 10%

# --- Page File Settings ---
# Minimum fixed page file size in MiB
[uint32]$script:PAGE_FILE_MINIMUM_SIZE_MIB = 4096          # 4 GiB

# --- Cluster Performance Log Collection ---
# Minimum free disk space (in MiB) required before starting log collection
[uint32]$script:LOG_COLLECTION_MIN_DISK_MIB = 10240        # 10 GiB

# Disk space reserve percentage for log collection
[double]$script:LOG_COLLECTION_DISK_RESERVE_PERCENT = 0.05 # 5%

# --- DNS Settings ---
# Maximum number of DNS resolution retry attempts
[int]$script:DNS_MAX_RETRIES = 3

# Base delay in seconds for exponential backoff between DNS retries
[int]$script:DNS_RETRY_BASE_DELAY_SEC = 1

# --- HTTP / Layer 7 Settings ---
# Maximum number of HTTP redirect hops before giving up
[int]$script:HTTP_MAX_REDIRECTS = 10

# Initial timeout in seconds for Invoke-WebRequest connectivity tests. Picked to
# accommodate slow links and proxy paths where some Azure data-plane endpoints
# (notably guestnotificationservice.azure.com/urls/allowlist) take longer than
# 60 s to assemble a response.
[int]$script:HTTP_TIMEOUT_INITIAL_SEC = 90

# Extended timeout (seconds) used for a single retry when an endpoint returns
# 'The operation has timed out.' on the first attempt. Each endpoint gets at
# most one retry; there is no per-run budget cap, so a customer with a slow
# link will still get every endpoint retried fairly.
[int]$script:HTTP_TIMEOUT_RETRY_SEC = 120

# Maximum total Invoke-WebRequest attempts for a single endpoint when the first
# attempt fails with a DNS-resolution error ('NameResolutionFailure' /
# 'The remote name could not be resolved'). The DNS pre-check loop already
# probes name resolution up to $script:DNS_MAX_RETRIES times before
# Invoke-WebRequest is called, so a transient WebException-side DNS failure
# usually clears within a second or two (caching / TTL warm-up, proxy
# resolver, IPv6/IPv4 race). Three total attempts (initial + 2 retries) keeps
# the worst-case overhead bounded while recovering nearly all real flakes.
[int]$script:HTTP_DNS_RETRY_MAX_ATTEMPTS = 3

# Delay in seconds between Invoke-WebRequest DNS-failure retries. Kept small
# (no exponential backoff) because the DNS pre-check loop has already done
# the slower retries; this is just a brief pause to let the resolver / proxy
# settle before re-issuing the HTTP request.
[int]$script:HTTP_DNS_RETRY_DELAY_SEC = 1

# Certificate-capture timeout in ticks (15 seconds = 150,000,000 ticks)
# Intentionally shorter than the connectivity timeout (90 seconds) to limit impact of unresponsive backend pool servers
[long]$script:CERT_CAPTURE_TIMEOUT_TICKS = 150000000

# --- Network Ports ---
# Well-known ports used for protocol inference
[int]$script:PORT_HTTP = 80
[int]$script:PORT_HTTPS = 443
[int]$script:PORT_HTTPS_ALT1 = 8084
[int]$script:PORT_HTTPS_ALT2 = 8443
[int]$script:PORT_NTP = 123

# --- Default Export Path ---
# Canonical on-disk location every diagnostic run writes to. Test-AzureLocalConnectivity
# ALWAYS writes its artifacts here; if a caller supplies a different -ExportPath the run
# folder is additionally copied there (never instead). Single source of truth for the default.
[string]$script:DEFAULT_DIAG_EXPORT_PATH = 'C:\ProgramData\AzStackHci.DiagnosticSettings'

# --- Animation / UI ---
# Spinner animation frame interval in milliseconds
[int]$script:ANIMATION_FRAME_MS = 125

# Maximum time (in seconds) to wait for a background job before giving up
[int]$script:JOB_ANIMATION_TIMEOUT_SEC = 600  # 10 minutes

# --- SSL Inspection Detection ---
# Known trusted root CA thumbprints for Microsoft services.
# Used by Test-AzStackHciSSLInspection to verify the certificate chain
# is not being intercepted by an SSL inspection appliance.
# These are the root CAs that Microsoft and its CDN partners use.
[string[]]$script:TRUSTED_ROOT_CA_THUMBPRINTS = @(
    # DigiCert Global Root G2
    'DF3C24F9BFD666761B268073FE06D1CC8D4F82A4',
    # DigiCert Global Root CA
    'A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436',
    # Baltimore CyberTrust Root
    'D4DE20D05E66FC53FE1A50882C78DB2852CAE474',
    # Microsoft RSA Root Certificate Authority 2017
    '73A5E64A3BFF8316FF0EDCCC618A906E4EAE4D74',
    # Microsoft ECC Root Certificate Authority 2017
    '999A64C37FF47D9FAB95F14769891460EEC4C3C5'
)

# Expected certificate issuer organization strings (for string-based fallback check)
[string[]]$script:EXPECTED_CERT_ISSUERS = @(
    'O=Microsoft Corporation',
    'O=DigiCert Inc'
)

# --- CRL / OCSP Revocation Check Classification ---
# X509Chain / Test-Certificate status tokens that indicate the chain is TRUSTED but the
# revocation check (CRL / OCSP) could not be completed because the relevant endpoint is
# unreachable from this host. These cases are NOT SSL inspection — they indicate an
# egress/firewall issue to the CA's revocation infrastructure.
[string[]]$script:CERT_CHAIN_STATUS_REVOCATION_OFFLINE = @(
    'RevocationStatusUnknown',
    'OfflineRevocation',
    'CERT_TRUST_REVOCATION_STATUS_UNKNOWN',
    'CERT_TRUST_IS_OFFLINE_REVOCATION'
)

# X.509 extension OIDs used to extract CRL Distribution Points and OCSP responder URLs.
[string]$script:CRL_DP_OID = '2.5.29.31'               # CRL Distribution Points
[string]$script:AIA_OID    = '1.3.6.1.5.5.7.1.1'       # Authority Information Access (OCSP)

# Cap how many revocation-dependency rows we append per leaf certificate.
# 1 CRL + 1 OCSP is sufficient to catch real-world path-based proxy blocking without
# bloating the result table for certs that list 4+ distribution points.
[int]$script:CRL_MAX_DP_PER_CERT   = 1
[int]$script:CRL_MAX_OCSP_PER_CERT = 1

# --- Critical Arc Service Private Link Endpoints ---
# Endpoints that MUST NOT resolve to RFC1918 addresses (Arc Private Link Scopes not supported for Azure Local)
# Reference: https://learn.microsoft.com/en-us/azure/azure-local/concepts/firewall-requirements
[string[]]$script:PRIVATE_LINK_CRITICAL_ENDPOINTS = @(
    'gbl.his.arc.azure.com',
    '*.his.arc.azure.com',
    '*.guestconfiguration.azure.com',
    '*.dp.kubernetesconfiguration.azure.com'
)

# --- PaaS Services Supporting Private Link ---
# Endpoints that CAN use Private Link but must be added to proxy bypass/exception list when a proxy is in use.
# Traffic to these must route via ExpressRoute or Site-to-Site VPN to reach private endpoints.
[string[]]$script:PRIVATE_LINK_PROXY_BYPASS_ENDPOINTS = @(
    '*.vault.azure.net',
    '*.vaultcore.azure.net',
    '*.blob.core.windows.net',
    '*.azurecr.io',
    '*.database.windows.net',
    '*.siterecovery.windowsazure.com',
    '*.backup.windowsazure.com',
    '*.servicebus.windows.net'
)

# --- Azure Region Endpoint URLs ---
# GitHub raw URLs for downloading region-specific required endpoint lists.
# Used by Test-AzureLocalConnectivity to fetch the latest endpoint definitions.
[hashtable]$script:REGION_ENDPOINT_URLS = @{
    "EastUS"        = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/master/HCI/EastUSendpoints/eastus-hci-endpoints.md"
    "WestEurope"    = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/master/HCI/WestEuropeendpoints/westeurope-hci-endpoints.md"
    "AustraliaEast" = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/master/HCI/AustraliaEastendpoints/AustraliaEast-hci-endpoints.md"
    "CanadaCentral"  = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/master/HCI/CanadaCentralEndpoints/canadacentral-hci-endpoints.md"
    "CentralIndia"  = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/IndiaCentralEndpoints/IndiaCentral-hci-endpoints.md"
    "JapanEast"     = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/JapanEastEndpoints/japaneast-hci-endpoints.md"
    "SouthCentral"  = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/SouthCentralUSEndpoints/southcentralus-hci-endpoints.md"
    "SouthEastAsia" = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/SouthEastAsiaEndpoints/southeastasia-hci-endpoints.md"
    "USGovVirginia" = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/usgovvirginia-hci-endpoints/usgovvirginia-hci-endpoints.md"
}

# --- OEM SBE Endpoint URLs ---
# GitHub raw URLs for hardware OEM Solution Builder Extension (SBE) endpoint lists.
# Used by Get-HardwareOEMUrlContent to fetch OEM-specific required endpoints.
[hashtable]$script:OEM_ENDPOINT_URLS = @{
    "DataOn"  = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/OEMEndpoints/DataOn/DataOnAzureLocalEndpoints.md"
    "Dell"    = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/OEMEndpoints/Dell/DellAzureLocalEndpoints.md"
    "HPE"     = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/OEMEndpoints/HPE/HPEAzureLocalEndpoints.md"
    "Hitachi" = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/OEMEndpoints/Hitachi/HitachiAzureLocalEndpoints.md"
    "Lenovo"  = "https://raw.githubusercontent.com/Azure/AzureStack-Tools/refs/heads/master/HCI/OEMEndpoints/Lenovo/LenovoAzureLocalEndpoints.md"
}

# --- Manually Defined Wildcard Subdomains ---
# Static list of known subdomains used to validate connectivity for wildcard endpoints.
# Defined here so the total count is available before the main testing loop for unified progress tracking.
$script:MANUAL_SUBDOMAINS = @(
    @{ Wildcard = "*.blob.core.windows.net"; Subdomains = @("mystorageaccount.blob.core.windows.net","eus2azreplstore214.blob.core.windows.net") },
    @{ Wildcard = "*.download.windowsupdate.com"; Subdomains = @("1a.au.download.windowsupdate.com") },
    @{ Wildcard = "*.update.microsoft.com"; Subdomains = @("fe2.update.microsoft.com") },
    @{ Wildcard = "*.windowsupdate.com"; Subdomains = @("ctldl.windowsupdate.com") },
    @{ Wildcard = "*.endpoint.security.microsoft.com"; Subdomains = @("edr-neu3.eu.endpoint.security.microsoft.com") },
    @{ Wildcard = "*.prod.hot.ingest.monitor.core.windows.net"; Subdomains = @("prod5.prod.hot.ingest.monitor.core.windows.net") },
    @{ Wildcard = "*.servicebus.windows.net"; Subdomains = @("azgn-southcentralus-public-1p-sn-vazr0002.servicebus.windows.net") }
)
# Pre-calculated total subdomain count for progress tracking
[int]$script:MANUAL_SUBDOMAIN_COUNT = ($script:MANUAL_SUBDOMAINS | ForEach-Object { $_.Subdomains.Count } | Measure-Object -Sum).Sum

# --- Module State Initialization ---
# Central initialization of all module-scoped state variables.
# This makes the shared surface explicit and enables clean reset between runs.
function Initialize-ModuleState {
    <#
    .SYNOPSIS
        Resets all module-scoped state variables to their default values.
    .DESCRIPTION
        Called during module load and can be called between test runs to ensure
        clean state. All $script: variables used for cross-function communication
        are initialized here.
    #>

    $script:SilentMode = $false
    $script:Proxy = $null
    # Set by Invoke-Layer7BucketWorker (Private/AzStackHci.ParallelLayer7.Helpers.ps1)
    # to '[bucket-N] ' so every Write-HostAzS line emitted from inside a parallel
    # worker is tagged with its bucket index. Stays empty in the parent process and
    # in -Parallelism 1 / -Scope Node runs.
    $script:WorkerLogPrefix = ''
    [System.Collections.ArrayList]$script:Results = @()
    [System.Collections.ArrayList]$script:RedirectedResults = @()
    $script:SSLInspectionDetected = $false
    [System.Collections.ArrayList]$script:SSLInspectedURLs = @()
    # Endpoints whose certificate chain is TRUSTED but whose CRL/OCSP revocation check
    # could not be completed (CRL/OCSP endpoint unreachable). Tracked separately from
    # SSLInspectedURLs so the summary output differentiates the two failure modes.
    [System.Collections.ArrayList]$script:CRLOfflineURLs = @()
    $script:PrivateLinkDetected = $false
    $script:PrivateLinkDetectedArray = @()
    $script:PrivateLinkCriticalArray = @()
    $script:PrivateLinkProxyBypassArray = @()
    $script:PrivateLinkCriticalEndpoints = $script:PRIVATE_LINK_CRITICAL_ENDPOINTS
    $script:PrivateLinkProxyBypassEndpoints = $script:PRIVATE_LINK_PROXY_BYPASS_ENDPOINTS
    $script:DedicatedDumpFileSize = 0
    $script:MinimumRequiredDiskSpace = 0
    $script:PageFileAutoManaged = $false
    $script:PageFileConfiguration = $null
    $script:PageFileAllocatedBaseSize = 0
    $script:PageFileCurrentUsage = 0
    $script:PageFilePeakUsage = 0
    $script:CurrentDumpFile = $null
    $script:CurrentSettings = $null
    $script:DateFormatted = $null
    $script:OutputFolderPath = $null
    $script:OutputFile = $null
    $script:OutputFileExtension = $null
    $script:CsvFile = $null
    $script:TranscriptFile = $null
    $script:UpdatedKeyVaultURL = $null
    $script:UpdatedArcGatewayURL = $null
    $script:HardwareOEM = $null
    $script:PreArcGatewayRemoval = $null
    $script:job = $null
}

# Initialize state on module load
Initialize-ModuleState

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