# ==============================================================================
# MasterHttpRelayVPN - Client Configuration
# ------------------------------------------------------------------------------
# This file controls the local SOCKS client and its HTTP relay behavior.
# Each option below includes:
# - purpose
# - default value used by the code when omitted
# - allowed values or constraints
# ------------------------------------------------------------------------------
# Notes:
# - String values must stay inside quotes.
# - Time values here are in milliseconds unless stated otherwise.
# - Size values here are in bytes.
# ==============================================================================

# ==============================================================================
# SECURITY / RELAY
# ------------------------------------------------------------------------------
# AES_ENCRYPTION_KEY:
# Shared symmetric key used to encrypt and decrypt every HTTP batch body.
# This value must match the server configuration exactly.
# Default: none, required
# Allowed: any non-empty string
AES_ENCRYPTION_KEY = "c4710a45afed2fdc00e0522c70802e71"

# RELAY_URLS:
# Array of relay endpoints used by the client for sending encrypted batches.
# Each entry can point directly to the Go server or to a PHP relay/fronting endpoint.
# The client chooses one endpoint per request using RELAY_URL_SELECTION.
# Example:
# RELAY_URLS = ["https://a.example/relay.php", "https://b.example/relay.php"]
# Default: one local relay URL
# Allowed: one or more http:// / https:// URLs
RELAY_URLS = ["http://127.0.0.1/relay.php"]

# RELAY_URL_SELECTION:
# Selection algorithm used when RELAY_URLS contains more than one endpoint.
# "round_robin" = rotate endpoints in order per request
# "random"      = choose a random endpoint per request
# Default: "round_robin"
# Allowed: "round_robin", "random"
RELAY_URL_SELECTION = "round_robin"

# ==============================================================================
# HTTP DISGUISE / HEADER SHAPE
# ------------------------------------------------------------------------------
# HTTP_USER_AGENTS_FILE:
# Path to a text file containing one User-Agent per line.
# The client randomly selects one entry for outgoing relay requests.
# If the file is missing or empty, built-in defaults are used.
# Default: "user-agents.txt"
# Allowed: any relative or absolute file path
HTTP_USER_AGENTS_FILE = "user-agents.txt"

# HTTP_HEADER_PROFILE:
# Controls which family of HTTP headers is generated for relay requests.
# "browser" = browser-like fetch headers
# "cdn"     = proxy/CDN-friendly generic fetch headers
# "api"     = API/client-like request headers
# "minimal" = only essential headers, lowest disguise
# Default: "browser"
# Allowed: "browser", "cdn", "api", "minimal"
HTTP_HEADER_PROFILE = "browser"

# HTTP_RANDOMIZE_HEADERS:
# Enables random decorative headers such as padding and nonce values.
# Helps requests look less static across time.
# Default: true
# Allowed: true, false
HTTP_RANDOMIZE_HEADERS = true

# HTTP_RANDOMIZE_TRANSPORT:
# Enables bounded transport-level randomization so request behavior is not too
# fixed over time. When enabled, the client may vary:
# - mux burst threshold
# - mux rotation cadence
# - ping intervals
# - HTTP connection reuse lifetime
# Default: false
# Allowed: true, false
HTTP_RANDOMIZE_TRANSPORT = false

# HTTP_PADDING_HEADER:
# Name of the extra padding header added when HTTP_RANDOMIZE_HEADERS=true.
# The client fills it with random hex text.
# Default: "X-Padding"
# Allowed: any non-empty HTTP header name
HTTP_PADDING_HEADER = "X-Padding"

# HTTP_PADDING_MIN_BYTES:
# Minimum random padding payload length placed into HTTP_PADDING_HEADER.
# Default: 16
# Allowed: integer >= 0
HTTP_PADDING_MIN_BYTES = 16

# HTTP_PADDING_MAX_BYTES:
# Maximum random padding payload length placed into HTTP_PADDING_HEADER.
# Must be >= HTTP_PADDING_MIN_BYTES.
# Default: 48
# Allowed: integer >= HTTP_PADDING_MIN_BYTES
HTTP_PADDING_MAX_BYTES = 48

# HTTP_REFERER:
# Optional fixed Referer header.
# If left empty, the client auto-generates referers derived from RELAY_URL.
# Default: ""
# Allowed: empty string, or any valid URL string
HTTP_REFERER = ""

# HTTP_ACCEPT_LANGUAGE:
# Optional fixed Accept-Language header.
# If empty, the client randomly selects from built-in language profiles.
# Default: ""
# Allowed: empty string, or any valid Accept-Language header value
HTTP_ACCEPT_LANGUAGE = ""

# HTTP_RANDOMIZE_QUERY_SUFFIX:
# If true, the client appends a randomized query parameter to RELAY_URL on each
# outbound relay request. This can produce patterns such as:
# - ?webhe=abc123-9kf83d-72jf0a4x-zz91m3e8c2
# - ?r=<random>
# - ?_=<random>
# Existing query parameters in RELAY_URL are preserved.
# Default: false
# Allowed: true, false
HTTP_RANDOMIZE_QUERY_SUFFIX = false

# ==============================================================================
# HTTP TIMING / BATCH SHAPE RANDOMIZATION
# ------------------------------------------------------------------------------
# HTTP_TIMING_JITTER_MS:
# Adds random delay jitter on top of poll/worker wait intervals.
# This makes request timing less perfectly periodic.
# Default: 50
# Allowed: integer >= 0
HTTP_TIMING_JITTER_MS = 50

# HTTP_IDLE_CONN_TIMEOUT_MIN_MS / HTTP_IDLE_CONN_TIMEOUT_MAX_MS:
# When HTTP_RANDOMIZE_TRANSPORT=true, each sender worker picks an idle keepalive
# timeout inside this range for its HTTP transport.
# Default: 15000..45000
# Allowed: integer >= 1, and MAX >= MIN
HTTP_IDLE_CONN_TIMEOUT_MIN_MS = 15000
HTTP_IDLE_CONN_TIMEOUT_MAX_MS = 45000

# HTTP_TRANSPORT_REUSE_MIN / HTTP_TRANSPORT_REUSE_MAX:
# When HTTP_RANDOMIZE_TRANSPORT=true, each worker reuses its HTTP transport for
# a random number of requests inside this range before recycling idle connections
# and refreshing the transport profile.
# Default: 8..24
# Allowed: integer >= 1, and MAX >= MIN
HTTP_TRANSPORT_REUSE_MIN = 8
HTTP_TRANSPORT_REUSE_MAX = 24

# HTTP_BATCH_RANDOMIZE:
# Enables slight randomization of effective batch size and packet count per send.
# This reduces a perfectly fixed request shape.
# Default: true
# Allowed: true, false
HTTP_BATCH_RANDOMIZE = true

# HTTP_BATCH_PACKETS_JITTER:
# Maximum number of packets subtracted from MAX_PACKETS_PER_BATCH randomly.
# Example: if MAX_PACKETS_PER_BATCH=32 and jitter=4, effective limit may be 28..32.
# Default: 4
# Allowed: integer >= 0
HTTP_BATCH_PACKETS_JITTER = 4

# HTTP_BATCH_BYTES_JITTER:
# Maximum number of bytes subtracted from MAX_BATCH_BYTES randomly.
# Example: if MAX_BATCH_BYTES=262144 and jitter=32768, effective limit may be
# between 229376 and 262144, but never below MAX_CHUNK_SIZE.
# Default: 32768
# Allowed: integer >= 0
HTTP_BATCH_BYTES_JITTER = 32768

# ==============================================================================
# LOGGING
# ------------------------------------------------------------------------------
# LOG_LEVEL:
# Controls client log verbosity.
# Default: "INFO"
# Allowed in practice by logger: "DEBUG", "INFO", "WARN", "ERROR"
LOG_LEVEL = "DEBUG"

# ==============================================================================
# LOCAL SOCKS LISTENER
# ------------------------------------------------------------------------------
# SOCKS_HOST:
# Local interface used by the client SOCKS5 listener.
# Default: "127.0.0.1"
# Allowed: any valid bind host/IP
SOCKS_HOST = "127.0.0.1"

# SOCKS_PORT:
# Local port used by the SOCKS5 listener.
# Default: 1080
# Allowed: integer 1..65535
SOCKS_PORT = 18001

# SOCKS_AUTH:
# Enables username/password authentication for the local SOCKS listener.
# Default: false
# Allowed: true, false
SOCKS_AUTH = false

# SOCKS_USERNAME:
# Local SOCKS username used only when SOCKS_AUTH=true.
# Default: ""
# Allowed: any string
SOCKS_USERNAME = "your_socks_username_here"

# SOCKS_PASSWORD:
# Local SOCKS password used only when SOCKS_AUTH=true.
# Default: ""
# Allowed: any string
SOCKS_PASSWORD = "your_socks_password_here"

# ==============================================================================
# TRANSPORT / FLOW CONTROL
# ------------------------------------------------------------------------------
# MAX_CHUNK_SIZE:
# Maximum payload size for a single SOCKS data packet before chunking.
# Also used as the minimum safe lower bound for several queue/body limits.
# Default: 16384 (16 KiB)
# Allowed: integer >= 1
MAX_CHUNK_SIZE = 16384

# MAX_PACKETS_PER_BATCH:
# Hard upper bound for packet count in one outbound HTTP batch before jitter.
# Default: 32
# Allowed: integer >= 1
MAX_PACKETS_PER_BATCH = 32

# MAX_BATCH_BYTES:
# Hard upper bound for total payload bytes in one HTTP batch before jitter.
# Must be >= MAX_CHUNK_SIZE.
# Default: 262144 (256 KiB)
# Allowed: integer >= MAX_CHUNK_SIZE
MAX_BATCH_BYTES = 262144

# WORKER_COUNT:
# Number of concurrent sender workers posting batches to the relay.
# Default: 4
# Allowed: integer >= 1
WORKER_COUNT = 4

# MAX_CONCURRENT_BATCHES:
# Global cap for how many relay HTTP batches may be in-flight at the same time.
# Under light load the client intentionally stays at 1 active batch; when queued
# bytes reach MUX_BURST_THRESHOLD_BYTES it may expand up to this cap.
# This value must be <= WORKER_COUNT.
# Default: 4
# Allowed: integer 1..WORKER_COUNT
MAX_CONCURRENT_BATCHES = 4

# MAX_PACKETS_PER_SOCKS_PER_BATCH:
# Fairness limit per mux round. One SOCKS connection may contribute at most this
# many packets to a single HTTP batch, which prevents a hot stream from filling
# the whole batch alone.
# Default: 2
# Allowed: integer >= 1
MAX_PACKETS_PER_SOCKS_PER_BATCH = 2

# MUX_ROTATE_EVERY_BATCHES:
# Controls how often the round-robin batch start cursor moves to the next SOCKS
# connection. 1 means rotate every batch, 2 means hold the same start point for
# two batches before moving, and so on.
# Default: 1
# Allowed: integer >= 1
MUX_ROTATE_EVERY_BATCHES = 1

# MUX_ROTATE_JITTER_BATCHES:
# Extra random batches added on top of MUX_ROTATE_EVERY_BATCHES when
# HTTP_RANDOMIZE_TRANSPORT=true.
# Default: 0
# Allowed: integer >= 0
MUX_ROTATE_JITTER_BATCHES = 0

# MUX_BURST_THRESHOLD_BYTES:
# Total queued outbound payload bytes across all active SOCKS connections that
# triggers burst mode. Below this threshold the client behaves conservatively
# with 1 active batch and smaller effective batch shapes; at or above it, the
# client uses faster polling and may scale up to MAX_CONCURRENT_BATCHES.
# Must be >= MAX_CHUNK_SIZE.
# Default: 131072 (128 KiB)
# Allowed: integer >= MAX_CHUNK_SIZE
MUX_BURST_THRESHOLD_BYTES = 131072

# MUX_BURST_THRESHOLD_JITTER_BYTES:
# Random plus/minus jitter applied to MUX_BURST_THRESHOLD_BYTES when
# HTTP_RANDOMIZE_TRANSPORT=true. The effective threshold never goes below
# MAX_CHUNK_SIZE.
# Default: 0
# Allowed: integer >= 0
MUX_BURST_THRESHOLD_JITTER_BYTES = 0

# HTTP_REQUEST_TIMEOUT_MS:
# Timeout for a single relay HTTP request.
# If exceeded, in-flight packets may be retried according to ACK policy.
# Default: 15000
# Allowed: integer >= 1
HTTP_REQUEST_TIMEOUT_MS = 15000

# WORKER_POLL_INTERVAL_MS:
# Base idle wait time used by sender workers when no immediate work exists.
# Lower values may reduce latency but increase CPU wakeups.
# Default: 200
# Allowed: integer >= 1
WORKER_POLL_INTERVAL_MS = 200

# IDLE_POLL_INTERVAL_MS:
# Minimum ping interval used shortly after real traffic, before idle keepalive
# backoff starts growing.
# Must be >= WORKER_POLL_INTERVAL_MS.
# Default: 1000
# Allowed: integer >= WORKER_POLL_INTERVAL_MS
IDLE_POLL_INTERVAL_MS = 1000

# PING_INTERVAL_JITTER_MS:
# Extra random delay added to aggressive idle ping intervals and ping backoff
# intervals when HTTP_RANDOMIZE_TRANSPORT=true.
# Default: 0
# Allowed: integer >= 0
PING_INTERVAL_JITTER_MS = 0

# PING_WARM_THRESHOLD_MS:
# If no real non-ping traffic has been seen for at least this long, the client
# leaves the aggressive idle poll interval and switches to ping backoff mode.
# Default: 5000
# Allowed: integer >= 1
PING_WARM_THRESHOLD_MS = 5000

# PING_BACKOFF_BASE_MS:
# First keepalive interval used after the client becomes idle-only.
# Default: 5000
# Allowed: integer >= IDLE_POLL_INTERVAL_MS
PING_BACKOFF_BASE_MS = 5000

# PING_BACKOFF_STEP_MS:
# Extra delay added after each successful idle-only ping/pong round.
# Example: with base=5000 and step=5000, intervals become 5s, 10s, 15s, ...
# Default: 5000
# Allowed: integer >= 1
PING_BACKOFF_STEP_MS = 5000

# PING_MAX_INTERVAL_MS:
# Maximum keepalive interval cap when the connection has stayed idle for a long time.
# Default: 60000
# Allowed: integer >= PING_BACKOFF_BASE_MS
PING_MAX_INTERVAL_MS = 60000

# MAX_QUEUE_BYTES_PER_SOCKS:
# Maximum queued payload bytes allowed per local SOCKS connection.
# Prevents unbounded client-side buffering for a single connection.
# Must be >= MAX_CHUNK_SIZE.
# Default: 1048576 (1 MiB)
# Allowed: integer >= MAX_CHUNK_SIZE
MAX_QUEUE_BYTES_PER_SOCKS = 1048576

# ACK_TIMEOUT_MS:
# Time to wait before considering an in-flight packet lost and eligible for retry.
# Default: 5000
# Allowed: integer >= 1
ACK_TIMEOUT_MS = 5000

# MAX_RETRY_COUNT:
# Maximum resend attempts for a packet before the connection is failed.
# Default: 5
# Allowed: integer >= 0
MAX_RETRY_COUNT = 5

# REORDER_TIMEOUT_MS:
# Maximum time an out-of-order inbound packet may wait for missing earlier packets.
# If the gap is not filled before this timeout, the connection is reset.
# Default: 5000
# Allowed: integer >= 1
REORDER_TIMEOUT_MS = 5000

# MAX_REORDER_BUFFER_PACKETS:
# Maximum number of out-of-order inbound packets buffered per SOCKS connection.
# If exceeded, the connection is reset to avoid unbounded memory growth.
# Default: 128
# Allowed: integer >= 1
MAX_REORDER_BUFFER_PACKETS = 128

# ==============================================================================