213 lines
7.2 KiB
Go
213 lines
7.2 KiB
Go
package main
|
|
|
|
import (
|
|
"flag"
|
|
"io/ioutil"
|
|
"log"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/hashicorp/logutils"
|
|
"gopkg.in/yaml.v2"
|
|
)
|
|
|
|
// getEnvString returns string from environment variable
|
|
func getEnvString(env, def string) (val string) { //nolint:deadcode
|
|
defer timeTrack(time.Now(), "getEnvString")
|
|
|
|
val = os.Getenv(env)
|
|
|
|
if val == "" {
|
|
return def
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// getEnvInt returns int from environment variable
|
|
func getEnvInt(env string, def int) (ret int) {
|
|
defer timeTrack(time.Now(), "getEnvInt")
|
|
|
|
val := os.Getenv(env)
|
|
|
|
if val == "" {
|
|
return def
|
|
}
|
|
|
|
ret, err := strconv.Atoi(val)
|
|
if err != nil {
|
|
log.Fatalf("[ERROR] Environment variable is not numeric: %v\n", env)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func initialize() {
|
|
defer timeTrack(time.Now(), "initialize")
|
|
|
|
config.TimeZone, _ = time.LoadLocation("America/Chicago")
|
|
config.TimeZoneUTC, _ = time.LoadLocation("UTC")
|
|
|
|
// read command line options
|
|
var (
|
|
logLevel int
|
|
ns1, ns2 string
|
|
)
|
|
|
|
// log configuration
|
|
flag.IntVar(&logLevel,
|
|
"log",
|
|
getEnvInt("LOG_LEVEL", 50),
|
|
"(LOG_LEVEL)\nlog level")
|
|
// http client configuration
|
|
flag.IntVar(&config.HTTPClientRequestTimeout,
|
|
"client-req-to",
|
|
getEnvInt("HTTP_CLIENT_REQUEST_TIMEOUT", 60),
|
|
"(HTTP_CLIENT_REQUEST_TIMEOUT)\ntime in seconds for the internal http client to complete a request")
|
|
flag.IntVar(&config.HTTPClientConnectTimeout,
|
|
"client-con-to",
|
|
getEnvInt("HTTP_CLIENT_CONNECT_TIMEOUT", 5),
|
|
"(HTTP_CLIENT_CONNECT_TIMEOUT)\ntime in seconds for the internal http client connection timeout")
|
|
flag.IntVar(&config.HTTPClientTLSHandshakeTimeout,
|
|
"client-tls-to",
|
|
getEnvInt("HTTP_CLIENT_TLS_TIMEOUT", 5),
|
|
"(HTTP_CLIENT_TLS_TIMEOUT)\ntime in seconds for the internal http client to complete a tls handshake")
|
|
flag.IntVar(&config.HTTPClientIdleTimeout,
|
|
"client-idle-to",
|
|
getEnvInt("HTTP_CLIENT_IDLE_TIMEOUT", 5),
|
|
"(HTTP_CLIENT_IDLE_TIMEOUT)\ntime in seconds that the internal http client will keep a connection open when idle")
|
|
// Bind Config
|
|
flag.StringVar(&config.Config.ZoneConfig.TTL,
|
|
"bind-ttl",
|
|
getEnvString("TTL", "1h"),
|
|
"(TTL)\nBind zone time to live")
|
|
flag.StringVar(&config.Config.ZoneConfig.Domain,
|
|
"bind-domain",
|
|
getEnvString("DOMAIN", "example.com"),
|
|
"(DOMAIN)\nBind zone base domain")
|
|
flag.StringVar(&config.Config.ZoneConfig.Email,
|
|
"bind-email",
|
|
getEnvString("EMAIL", "domain-admin@example.com"),
|
|
"(EMAIL)\nBind zone authority e-mail address")
|
|
flag.StringVar(&config.Config.ZoneConfig.Serial,
|
|
"bind-timestamp",
|
|
getEnvString("TIMESTAMP", time.Now().In(config.TimeZone).Format("0601021504")),
|
|
"(TIMESTAMP)\nBind zone serial number")
|
|
flag.StringVar(&config.Config.ZoneConfig.Refresh,
|
|
"bind-refresh",
|
|
getEnvString("REFRESH", "1h"),
|
|
"(REFRESH)\nBind zone refresh time")
|
|
flag.StringVar(&config.Config.ZoneConfig.Retry,
|
|
"bind-retry",
|
|
getEnvString("RETRY", "30m"),
|
|
"(RETRY)\nBind zone retry time")
|
|
flag.StringVar(&config.Config.ZoneConfig.Expire,
|
|
"bind-expire",
|
|
getEnvString("EXPIRE", "1w"),
|
|
"(EXPIRE)\nBind zone expire time")
|
|
flag.StringVar(&config.Config.ZoneConfig.Minimum,
|
|
"bind-minimum",
|
|
getEnvString("MINIMUM", "1h"),
|
|
"(MINIMUM)\nBind zone minimum time")
|
|
flag.StringVar(&ns1,
|
|
"bind-ns1",
|
|
getEnvString("NS1", ""),
|
|
"(NS1)\nBind zone primary name-server")
|
|
flag.StringVar(&ns2,
|
|
"bind-ns2",
|
|
getEnvString("NS2", ""),
|
|
"(NS2)\nBind zone secondary name-server")
|
|
// output file
|
|
flag.StringVar(&config.BindOutputFileName,
|
|
"output",
|
|
getEnvString("OUTPUT", "./response-policy.bind"),
|
|
"(FILENAME)\nWrite local file to filename")
|
|
flag.StringVar(&config.ConfigFileLocation,
|
|
"config-file",
|
|
getEnvString("CONFIG_FILE", ""),
|
|
"(CONFIG_FILE)\nRead configuration from file")
|
|
flag.Parse()
|
|
|
|
// set logging level
|
|
switch {
|
|
case logLevel <= 20:
|
|
config.Log.SetMinLevel(logutils.LogLevel("ERROR"))
|
|
case logLevel > 20 && logLevel <= 40:
|
|
config.Log.SetMinLevel(logutils.LogLevel("WARNING"))
|
|
case logLevel > 40 && logLevel <= 60:
|
|
config.Log.SetMinLevel(logutils.LogLevel("INFO"))
|
|
case logLevel > 60 && logLevel <= 80:
|
|
config.Log.SetMinLevel(logutils.LogLevel("DEBUG"))
|
|
case logLevel > 80:
|
|
config.Log.SetMinLevel(logutils.LogLevel("TRACE"))
|
|
}
|
|
log.SetOutput(config.Log)
|
|
|
|
// print current configuration
|
|
log.Printf("[DEBUG] configuration value set: LOG_LEVEL = %v\n", strconv.Itoa(logLevel))
|
|
log.Printf("[DEBUG] configuration value set: HTTP_CLIENT_REQUEST_TIMEOUT = %v\n", strconv.Itoa(config.HTTPClientRequestTimeout))
|
|
log.Printf("[DEBUG] configuration value set: HTTP_CLIENT_CONNECT_TIMEOUT = %v\n", strconv.Itoa(config.HTTPClientConnectTimeout))
|
|
log.Printf("[DEBUG] configuration value set: HTTP_CLIENT_TLS_TIMEOUT = %v\n", strconv.Itoa(config.HTTPClientTLSHandshakeTimeout))
|
|
log.Printf("[DEBUG] configuration value set: HTTP_CLIENT_IDLE_TIMEOUT = %v\n", strconv.Itoa(config.HTTPClientIdleTimeout))
|
|
log.Printf("[DEBUG] configuration value set: TTL = %v\n", config.Config.ZoneConfig.TTL)
|
|
log.Printf("[DEBUG] configuration value set: DOMAIN = %v\n", config.Config.ZoneConfig.Domain)
|
|
log.Printf("[DEBUG] configuration value set: EMAIL = %v\n", config.Config.ZoneConfig.Email)
|
|
log.Printf("[DEBUG] configuration value set: TIMESTAMP = %v\n", config.Config.ZoneConfig.Serial)
|
|
log.Printf("[DEBUG] configuration value set: REFRESH = %v\n", config.Config.ZoneConfig.Refresh)
|
|
log.Printf("[DEBUG] configuration value set: RETRY = %v\n", config.Config.ZoneConfig.Retry)
|
|
log.Printf("[DEBUG] configuration value set: EXPIRE = %v\n", config.Config.ZoneConfig.Expire)
|
|
log.Printf("[DEBUG] configuration value set: MINIMUM = %v\n", config.Config.ZoneConfig.Minimum)
|
|
log.Printf("[DEBUG] configuration value set: NS1 = %v\n", ns1)
|
|
log.Printf("[DEBUG] configuration value set: NS2 = %v\n", ns2)
|
|
log.Printf("[DEBUG] configuration value set: CONFIG_FILE = %v\n", config.ConfigFileLocation)
|
|
|
|
// read config file
|
|
var err error
|
|
if config.ConfigFileLocation != "" {
|
|
if config.Config, err = readConfigFile(config.ConfigFileLocation); err != nil {
|
|
log.Fatalf("[FATAL] Invalid config file: %v\n", err)
|
|
}
|
|
if config.Config.ZoneConfig.Serial == "" {
|
|
config.Config.ZoneConfig.Serial = time.Now().In(config.TimeZone).Format("0601021504")
|
|
}
|
|
}
|
|
|
|
// set bind-config nameservers
|
|
if ns1 != "" {
|
|
config.Config.ZoneConfig.NameServers = append(config.Config.ZoneConfig.NameServers, ns1)
|
|
}
|
|
if ns2 != "" {
|
|
config.Config.ZoneConfig.NameServers = append(config.Config.ZoneConfig.NameServers, ns2)
|
|
}
|
|
|
|
if len(config.Config.ZoneConfig.NameServers) == 0 {
|
|
log.Printf("[ERROR] A primary name-server must be identified.")
|
|
flag.PrintDefaults()
|
|
os.Exit(1)
|
|
}
|
|
|
|
// bind does not use "@", so we convert it to a "."
|
|
config.Config.ZoneConfig.Email = strings.Replace(config.Config.ZoneConfig.Email, "@", ".", -1)
|
|
|
|
log.Printf("[DEBUG] Initialization Complete\n")
|
|
}
|
|
|
|
func readConfigFile(configFileLocation string) (configFileStruct, error) {
|
|
defer timeTrack(time.Now(), "readConfigFile")
|
|
|
|
var output configFileStruct
|
|
|
|
rd, err := ioutil.ReadFile(configFileLocation)
|
|
if err != nil {
|
|
return output, err
|
|
}
|
|
|
|
if err := yaml.Unmarshal(rd, &output); err != nil {
|
|
return output, err
|
|
}
|
|
|
|
return output, nil
|
|
}
|