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// Copyright 2012-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"crypto/tls"
"crypto/x509"
"errors"
"flag"
"fmt"
"io/ioutil"
"net"
"net/url"
"os"
"strconv"
"strings"
"time"
"github.com/nats-io/gnatsd/conf"
"github.com/nats-io/nkeys"
)
// ClusterOpts are options for clusters.
type ClusterOpts struct {
Host string `json:"addr,omitempty"`
Port int `json:"cluster_port,omitempty"`
Username string `json:"-"`
Password string `json:"-"`
AuthTimeout float64 `json:"auth_timeout,omitempty"`
Permissions *RoutePermissions `json:"-"`
TLSTimeout float64 `json:"-"`
TLSConfig *tls.Config `json:"-"`
ListenStr string `json:"-"`
Advertise string `json:"-"`
NoAdvertise bool `json:"-"`
ConnectRetries int `json:"-"`
}
// Options block for gnatsd server.
type Options struct {
ConfigFile string `json:"-"`
Host string `json:"addr"`
Port int `json:"port"`
ClientAdvertise string `json:"-"`
Trace bool `json:"-"`
Debug bool `json:"-"`
NoLog bool `json:"-"`
NoSigs bool `json:"-"`
Logtime bool `json:"-"`
MaxConn int `json:"max_connections"`
MaxSubs int `json:"max_subscriptions,omitempty"`
Nkeys []*NkeyUser `json:"-"`
Users []*User `json:"-"`
Accounts []*Account `json:"-"`
AllowNewAccounts bool `json:"-"`
Username string `json:"-"`
Password string `json:"-"`
Authorization string `json:"-"`
PingInterval time.Duration `json:"ping_interval"`
MaxPingsOut int `json:"ping_max"`
HTTPHost string `json:"http_host"`
HTTPPort int `json:"http_port"`
HTTPSPort int `json:"https_port"`
AuthTimeout float64 `json:"auth_timeout"`
MaxControlLine int `json:"max_control_line"`
MaxPayload int `json:"max_payload"`
MaxPending int64 `json:"max_pending"`
Cluster ClusterOpts `json:"cluster,omitempty"`
ProfPort int `json:"-"`
PidFile string `json:"-"`
PortsFileDir string `json:"-"`
LogFile string `json:"-"`
Syslog bool `json:"-"`
RemoteSyslog string `json:"-"`
Routes []*url.URL `json:"-"`
RoutesStr string `json:"-"`
TLSTimeout float64 `json:"tls_timeout"`
TLS bool `json:"-"`
TLSVerify bool `json:"-"`
TLSCert string `json:"-"`
TLSKey string `json:"-"`
TLSCaCert string `json:"-"`
TLSConfig *tls.Config `json:"-"`
WriteDeadline time.Duration `json:"-"`
RQSubsSweep time.Duration `json:"-"` // Deprecated
MaxClosedClients int `json:"-"`
LameDuckDuration time.Duration `json:"-"`
TrustedNkeys []string `json:"-"`
CustomClientAuthentication Authentication `json:"-"`
CustomRouterAuthentication Authentication `json:"-"`
// CheckConfig configuration file syntax test was successful and exit.
CheckConfig bool `json:"-"`
}
// Clone performs a deep copy of the Options struct, returning a new clone
// with all values copied.
func (o *Options) Clone() *Options {
if o == nil {
return nil
}
clone := &Options{}
*clone = *o
if o.Users != nil {
clone.Users = make([]*User, len(o.Users))
for i, user := range o.Users {
clone.Users[i] = user.clone()
}
}
if o.Nkeys != nil {
clone.Nkeys = make([]*NkeyUser, len(o.Nkeys))
for i, nkey := range o.Nkeys {
clone.Nkeys[i] = nkey.clone()
}
}
if o.Routes != nil {
clone.Routes = make([]*url.URL, len(o.Routes))
for i, route := range o.Routes {
routeCopy := &url.URL{}
*routeCopy = *route
clone.Routes[i] = routeCopy
}
}
if o.TLSConfig != nil {
clone.TLSConfig = o.TLSConfig.Clone()
}
if o.Cluster.TLSConfig != nil {
clone.Cluster.TLSConfig = o.Cluster.TLSConfig.Clone()
}
return clone
}
// Configuration file authorization section.
type authorization struct {
// Singles
user string
pass string
token string
// Multiple Nkeys/Users
nkeys []*NkeyUser
users []*User
timeout float64
defaultPermissions *Permissions
}
// TLSConfigOpts holds the parsed tls config information,
// used with flag parsing
type TLSConfigOpts struct {
CertFile string
KeyFile string
CaFile string
Verify bool
Timeout float64
Ciphers []uint16
CurvePreferences []tls.CurveID
}
var tlsUsage = `
TLS configuration is specified in the tls section of a configuration file:
e.g.
tls {
cert_file: "./certs/server-cert.pem"
key_file: "./certs/server-key.pem"
ca_file: "./certs/ca.pem"
verify: true
cipher_suites: [
"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"
]
curve_preferences: [
"CurveP256",
"CurveP384",
"CurveP521"
]
}
Available cipher suites include:
`
// ProcessConfigFile processes a configuration file.
// FIXME(dlc): A bit hacky
func ProcessConfigFile(configFile string) (*Options, error) {
opts := &Options{}
if err := opts.ProcessConfigFile(configFile); err != nil {
// If only warnings then continue and return the options.
if cerr, ok := err.(*processConfigErr); ok && len(cerr.Errors()) == 0 {
return opts, nil
}
return nil, err
}
return opts, nil
}
// token is an item parsed from the configuration.
type token interface {
Value() interface{}
Line() int
IsUsedVariable() bool
SourceFile() string
Position() int
}
// unwrapValue can be used to get the token and value from an item
// to be able to report the line number in case of an incorrect
// configuration.
func unwrapValue(v interface{}) (token, interface{}) {
switch tk := v.(type) {
case token:
return tk, tk.Value()
default:
return nil, v
}
}
// ProcessConfigFile updates the Options structure with options
// present in the given configuration file.
// This version is convenient if one wants to set some default
// options and then override them with what is in the config file.
// For instance, this version allows you to do something such as:
//
// opts := &Options{Debug: true}
// opts.ProcessConfigFile(myConfigFile)
//
// If the config file contains "debug: false", after this call,
// opts.Debug would really be false. It would be impossible to
// achieve that with the non receiver ProcessConfigFile() version,
// since one would not know after the call if "debug" was not present
// or was present but set to false.
func (o *Options) ProcessConfigFile(configFile string) error {
o.ConfigFile = configFile
if configFile == "" {
return nil
}
m, err := conf.ParseFileWithChecks(configFile)
if err != nil {
return err
}
// Collect all errors and warnings and report them all together.
errors := make([]error, 0)
warnings := make([]error, 0)
for k, v := range m {
tk, v := unwrapValue(v)
switch strings.ToLower(k) {
case "listen":
hp, err := parseListen(v)
if err != nil {
errors = append(errors, &configErr{tk, err.Error()})
continue
}
o.Host = hp.host
o.Port = hp.port
case "client_advertise":
o.ClientAdvertise = v.(string)
case "port":
o.Port = int(v.(int64))
case "host", "net":
o.Host = v.(string)
case "debug":
o.Debug = v.(bool)
case "trace":
o.Trace = v.(bool)
case "logtime":
o.Logtime = v.(bool)
case "accounts":
err := parseAccounts(tk, o, &errors, &warnings)
if err != nil {
errors = append(errors, err)
continue
}
case "authorization":
auth, err := parseAuthorization(tk, o, &errors, &warnings)
if err != nil {
errors = append(errors, err)
continue
}
o.Username = auth.user
o.Password = auth.pass
o.Authorization = auth.token
if (auth.user != "" || auth.pass != "") && auth.token != "" {
err := &configErr{tk, fmt.Sprintf("Cannot have a user/pass and token")}
errors = append(errors, err)
continue
}
o.AuthTimeout = auth.timeout
// Check for multiple users defined
if auth.users != nil {
if auth.user != "" {
err := &configErr{tk, fmt.Sprintf("Can not have a single user/pass and a users array")}
errors = append(errors, err)
continue
}
if auth.token != "" {
err := &configErr{tk, fmt.Sprintf("Can not have a token and a users array")}
errors = append(errors, err)
continue
}
// Users may have been added from Accounts parsing, so do an append here
o.Users = append(o.Users, auth.users...)
}
// Check for nkeys
if auth.nkeys != nil {
// NKeys may have been added from Accounts parsing, so do an append here
o.Nkeys = append(o.Nkeys, auth.nkeys...)
}
case "http":
hp, err := parseListen(v)
if err != nil {
err := &configErr{tk, err.Error()}
errors = append(errors, err)
continue
}
o.HTTPHost = hp.host
o.HTTPPort = hp.port
case "https":
hp, err := parseListen(v)
if err != nil {
err := &configErr{tk, err.Error()}
errors = append(errors, err)
continue
}
o.HTTPHost = hp.host
o.HTTPSPort = hp.port
case "http_port", "monitor_port":
o.HTTPPort = int(v.(int64))
case "https_port":
o.HTTPSPort = int(v.(int64))
case "cluster":
err := parseCluster(tk, o, &errors, &warnings)
if err != nil {
errors = append(errors, err)
continue
}
case "logfile", "log_file":
o.LogFile = v.(string)
case "syslog":
o.Syslog = v.(bool)
case "remote_syslog":
o.RemoteSyslog = v.(string)
case "pidfile", "pid_file":
o.PidFile = v.(string)
case "ports_file_dir":
o.PortsFileDir = v.(string)
case "prof_port":
o.ProfPort = int(v.(int64))
case "max_control_line":
o.MaxControlLine = int(v.(int64))
case "max_payload":
o.MaxPayload = int(v.(int64))
case "max_pending":
o.MaxPending = v.(int64)
case "max_connections", "max_conn":
o.MaxConn = int(v.(int64))
case "max_subscriptions", "max_subs":
o.MaxSubs = int(v.(int64))
case "ping_interval":
o.PingInterval = time.Duration(int(v.(int64))) * time.Second
case "ping_max":
o.MaxPingsOut = int(v.(int64))
case "tls":
tc, err := parseTLS(tk, o)
if err != nil {
errors = append(errors, err)
continue
}
if o.TLSConfig, err = GenTLSConfig(tc); err != nil {
err := &configErr{tk, err.Error()}
errors = append(errors, err)
continue
}
o.TLSTimeout = tc.Timeout
case "write_deadline":
wd, ok := v.(string)
if ok {
dur, err := time.ParseDuration(wd)
if err != nil {
err := &configErr{tk, fmt.Sprintf("error parsing write_deadline: %v", err)}
errors = append(errors, err)
continue
}
o.WriteDeadline = dur
} else {
// Backward compatible with old type, assume this is the
// number of seconds.
o.WriteDeadline = time.Duration(v.(int64)) * time.Second
err := &configWarningErr{
field: k,
configErr: configErr{
token: tk,
reason: "write_deadline should be converted to a duration",
},
}
warnings = append(warnings, err)
}
case "lame_duck_duration":
dur, err := time.ParseDuration(v.(string))
if err != nil {
err := &configErr{tk, fmt.Sprintf("error parsing lame_duck_duration: %v", err)}
errors = append(errors, err)
continue
}
o.LameDuckDuration = dur
case "trusted":
switch v.(type) {
case string:
o.TrustedNkeys = []string{v.(string)}
case []string:
o.TrustedNkeys = v.([]string)
case []interface{}:
keys := make([]string, 0, len(v.([]interface{})))
for _, mv := range v.([]interface{}) {
tk, mv = unwrapValue(mv)
if key, ok := mv.(string); ok {
keys = append(keys, key)
} else {
err := &configErr{tk, fmt.Sprintf("error parsing trusted: unsupported type in array %T", mv)}
errors = append(errors, err)
continue
}
}
o.TrustedNkeys = keys
default:
err := &configErr{tk, fmt.Sprintf("error parsing trusted: unsupported type %T", v)}
errors = append(errors, err)
}
// Do a quick sanity check on keys
for _, key := range o.TrustedNkeys {
if !nkeys.IsValidPublicOperatorKey([]byte(key)) {
err := &configErr{tk, fmt.Sprintf("trust key %q required to be a valid public operator nkey", key)}
errors = append(errors, err)
}
}
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: k,
configErr: configErr{
token: tk,
},
}
errors = append(errors, err)
}
}
}
if len(errors) > 0 || len(warnings) > 0 {
return &processConfigErr{
errors: errors,
warnings: warnings,
}
}
return nil
}
// hostPort is simple struct to hold parsed listen/addr strings.
type hostPort struct {
host string
port int
}
// parseListen will parse listen option which is replacing host/net and port
func parseListen(v interface{}) (*hostPort, error) {
hp := &hostPort{}
switch vv := v.(type) {
// Only a port
case int64:
hp.port = int(vv)
case string:
host, port, err := net.SplitHostPort(vv)
if err != nil {
return nil, fmt.Errorf("Could not parse address string %q", vv)
}
hp.port, err = strconv.Atoi(port)
if err != nil {
return nil, fmt.Errorf("Could not parse port %q", port)
}
hp.host = host
}
return hp, nil
}
// parseCluster will parse the cluster config.
func parseCluster(v interface{}, opts *Options, errors *[]error, warnings *[]error) error {
tk, v := unwrapValue(v)
cm, ok := v.(map[string]interface{})
if !ok {
return &configErr{tk, fmt.Sprintf("Expected map to define cluster, got %T", v)}
}
for mk, mv := range cm {
// Again, unwrap token value if line check is required.
tk, mv = unwrapValue(mv)
switch strings.ToLower(mk) {
case "listen":
hp, err := parseListen(mv)
if err != nil {
err := &configErr{tk, err.Error()}
*errors = append(*errors, err)
continue
}
opts.Cluster.Host = hp.host
opts.Cluster.Port = hp.port
case "port":
opts.Cluster.Port = int(mv.(int64))
case "host", "net":
opts.Cluster.Host = mv.(string)
case "authorization":
auth, err := parseAuthorization(tk, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
if auth.users != nil {
err := &configErr{tk, fmt.Sprintf("Cluster authorization does not allow multiple users")}
*errors = append(*errors, err)
continue
}
opts.Cluster.Username = auth.user
opts.Cluster.Password = auth.pass
opts.Cluster.AuthTimeout = auth.timeout
if auth.defaultPermissions != nil {
err := &configWarningErr{
field: mk,
configErr: configErr{
token: tk,
reason: `setting "permissions" within cluster authorization block is deprecated`,
},
}
*warnings = append(*warnings, err)
// Do not set permissions if they were specified in top-level cluster block.
if opts.Cluster.Permissions == nil {
setClusterPermissions(&opts.Cluster, auth.defaultPermissions)
}
}
case "routes":
ra := mv.([]interface{})
opts.Routes = make([]*url.URL, 0, len(ra))
for _, r := range ra {
tk, r := unwrapValue(r)
routeURL := r.(string)
url, err := url.Parse(routeURL)
if err != nil {
err := &configErr{tk, fmt.Sprintf("error parsing route url [%q]", routeURL)}
*errors = append(*errors, err)
continue
}
opts.Routes = append(opts.Routes, url)
}
case "tls":
tc, err := parseTLS(tk, opts)
if err != nil {
*errors = append(*errors, err)
continue
}
if opts.Cluster.TLSConfig, err = GenTLSConfig(tc); err != nil {
err := &configErr{tk, err.Error()}
*errors = append(*errors, err)
continue
}
// For clusters, we will force strict verification. We also act
// as both client and server, so will mirror the rootCA to the
// clientCA pool.
opts.Cluster.TLSConfig.ClientAuth = tls.RequireAndVerifyClientCert
opts.Cluster.TLSConfig.RootCAs = opts.Cluster.TLSConfig.ClientCAs
opts.Cluster.TLSTimeout = tc.Timeout
case "cluster_advertise", "advertise":
opts.Cluster.Advertise = mv.(string)
case "no_advertise":
opts.Cluster.NoAdvertise = mv.(bool)
case "connect_retries":
opts.Cluster.ConnectRetries = int(mv.(int64))
case "permissions":
perms, err := parseUserPermissions(mv, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
// This will possibly override permissions that were define in auth block
setClusterPermissions(&opts.Cluster, perms)
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: mk,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
continue
}
}
}
return nil
}
// Sets cluster's permissions based on given pub/sub permissions,
// doing the appropriate translation.
func setClusterPermissions(opts *ClusterOpts, perms *Permissions) {
// Import is whether or not we will send a SUB for interest to the other side.
// Export is whether or not we will accept a SUB from the remote for a given subject.
// Both only effect interest registration.
// The parsing sets Import into Publish and Export into Subscribe, convert
// accordingly.
opts.Permissions = &RoutePermissions{
Import: perms.Publish,
Export: perms.Subscribe,
}
}
// Temp structures to hold account import and export defintions since they need
// to be processed after being parsed.
type export struct {
acc *Account
sub string
accs []string
}
type importStream struct {
acc *Account
an string
sub string
pre string
}
type importService struct {
acc *Account
an string
sub string
to string
}
// Checks if an account name is reserved.
func isReservedAccount(name string) bool {
return name == globalAccountName
}
// parseAccounts will parse the different accounts syntax.
func parseAccounts(v interface{}, opts *Options, errors *[]error, warnings *[]error) error {
var (
importStreams []*importStream
importServices []*importService
exportStreams []*export
exportServices []*export
)
tk, v := unwrapValue(v)
switch vv := v.(type) {
// Simple array of account names.
case []interface{}, []string:
m := make(map[string]struct{}, len(v.([]interface{})))
for _, n := range v.([]interface{}) {
tk, name := unwrapValue(n)
ns := name.(string)
// Check for reserved names.
if isReservedAccount(ns) {
err := &configErr{tk, fmt.Sprintf("%q is a Reserved Account", ns)}
*errors = append(*errors, err)
continue
}
if _, ok := m[ns]; ok {
err := &configErr{tk, fmt.Sprintf("Duplicate Account Entry: %s", ns)}
*errors = append(*errors, err)
continue
}
opts.Accounts = append(opts.Accounts, &Account{Name: ns})
m[ns] = struct{}{}
}
// More common map entry
case map[string]interface{}:
// Track users across accounts, must be unique across
// accounts and nkeys vs users.
uorn := make(map[string]struct{})
for aname, mv := range vv {
tk, amv := unwrapValue(mv)
// Skip referenced config vars within the account block.
if tk.IsUsedVariable() {
continue
}
// These should be maps.
mv, ok := amv.(map[string]interface{})
if !ok {
err := &configErr{tk, "Expected map entries for accounts"}
*errors = append(*errors, err)
continue
}
if isReservedAccount(aname) {
err := &configErr{tk, fmt.Sprintf("%q is a Reserved Account", aname)}
*errors = append(*errors, err)
continue
}
acc := &Account{Name: aname}
opts.Accounts = append(opts.Accounts, acc)
for k, v := range mv {
tk, mv := unwrapValue(v)
switch strings.ToLower(k) {
case "nkey":
nk, ok := mv.(string)
if !ok || !nkeys.IsValidPublicAccountKey([]byte(nk)) {
err := &configErr{tk, fmt.Sprintf("Not a valid public nkey for an account: %q", mv)}
*errors = append(*errors, err)
continue
}
acc.Nkey = nk
case "imports":
streams, services, err := parseAccountImports(tk, acc, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
importStreams = append(importStreams, streams...)
importServices = append(importServices, services...)
case "exports":
streams, services, err := parseAccountExports(tk, acc, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
exportStreams = append(exportStreams, streams...)
exportServices = append(exportServices, services...)
case "users":
nkeys, users, err := parseUsers(mv, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
for _, u := range users {
if _, ok := uorn[u.Username]; ok {
err := &configErr{tk, fmt.Sprintf("Duplicate user %q detected", u.Username)}
*errors = append(*errors, err)
continue
}
uorn[u.Username] = struct{}{}
u.Account = acc
}
opts.Users = append(opts.Users, users...)
for _, u := range nkeys {
if _, ok := uorn[u.Nkey]; ok {
err := &configErr{tk, fmt.Sprintf("Duplicate nkey %q detected", u.Nkey)}
*errors = append(*errors, err)
continue
}
uorn[u.Nkey] = struct{}{}
u.Account = acc
}
opts.Nkeys = append(opts.Nkeys, nkeys...)
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: k,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
}
}
}
}
}
// Bail already if there are previous errors.
if len(*errors) > 0 {
return nil
}
// Parse Imports and Exports here after all accounts defined.
// Do exports first since they need to be defined for imports to succeed
// since we do permissions checks.
// Create a lookup map for accounts lookups.
am := make(map[string]*Account, len(opts.Accounts))
for _, a := range opts.Accounts {
am[a.Name] = a
}
// Do stream exports
for _, stream := range exportStreams {
// Make array of accounts if applicable.
var accounts []*Account
for _, an := range stream.accs {
ta := am[an]
if ta == nil {
msg := fmt.Sprintf("%q account not defined for stream export", an)
*errors = append(*errors, &configErr{tk, msg})
continue
}
accounts = append(accounts, ta)
}
if err := stream.acc.AddStreamExport(stream.sub, accounts); err != nil {
msg := fmt.Sprintf("Error adding stream export %q: %v", stream.sub, err)
*errors = append(*errors, &configErr{tk, msg})
continue
}
}
for _, service := range exportServices {
// Make array of accounts if applicable.
var accounts []*Account
for _, an := range service.accs {
ta := am[an]
if ta == nil {
msg := fmt.Sprintf("%q account not defined for service export", an)
*errors = append(*errors, &configErr{tk, msg})
continue
}
accounts = append(accounts, ta)
}
if err := service.acc.AddServiceExport(service.sub, accounts); err != nil {
msg := fmt.Sprintf("Error adding service export %q: %v", service.sub, err)
*errors = append(*errors, &configErr{tk, msg})
continue
}
}
for _, stream := range importStreams {
ta := am[stream.an]
if ta == nil {
msg := fmt.Sprintf("%q account not defined for stream import", stream.an)
*errors = append(*errors, &configErr{tk, msg})
continue
}
if err := stream.acc.AddStreamImport(ta, stream.sub, stream.pre); err != nil {
msg := fmt.Sprintf("Error adding stream import %q: %v", stream.sub, err)
*errors = append(*errors, &configErr{tk, msg})
continue
}
}
for _, service := range importServices {
ta := am[service.an]
if ta == nil {
msg := fmt.Sprintf("%q account not defined for service import", service.an)
*errors = append(*errors, &configErr{tk, msg})
continue
}
if service.to == "" {
service.to = service.sub
}
if err := service.acc.AddServiceImport(ta, service.to, service.sub); err != nil {
msg := fmt.Sprintf("Error adding service import %q: %v", service.sub, err)
*errors = append(*errors, &configErr{tk, msg})
continue
}
}
return nil
}
// Parse the account imports
func parseAccountExports(v interface{}, acc *Account, errors, warnings *[]error) ([]*export, []*export, error) {
// This should be an array of objects/maps.
tk, v := unwrapValue(v)
ims, ok := v.([]interface{})
if !ok {
return nil, nil, &configErr{tk, fmt.Sprintf("Exports should be an array, got %T", v)}
}
var services []*export
var streams []*export
for _, v := range ims {
// Should have stream or service
stream, service, err := parseExportStreamOrService(v, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
if service != nil {
service.acc = acc
services = append(services, service)
}
if stream != nil {
stream.acc = acc
streams = append(streams, stream)
}
}
return streams, services, nil
}
// Parse the account imports
func parseAccountImports(v interface{}, acc *Account, errors, warnings *[]error) ([]*importStream, []*importService, error) {
// This should be an array of objects/maps.
tk, v := unwrapValue(v)
ims, ok := v.([]interface{})
if !ok {
return nil, nil, &configErr{tk, fmt.Sprintf("Imports should be an array, got %T", v)}
}
var services []*importService
var streams []*importStream
for _, v := range ims {
// Should have stream or service
stream, service, err := parseImportStreamOrService(v, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
if service != nil {
service.acc = acc
services = append(services, service)
}
if stream != nil {
stream.acc = acc
streams = append(streams, stream)
}
}
return streams, services, nil
}
// Helper to parse an embedded account description for imported services or streams.
func parseAccount(v map[string]interface{}, errors, warnings *[]error) (string, string, error) {
var accountName, subject string
for mk, mv := range v {
tk, mv := unwrapValue(mv)
switch strings.ToLower(mk) {
case "account":
accountName = mv.(string)
case "subject":
subject = mv.(string)
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: mk,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
}
}
}
return accountName, subject, nil
}
// Parse an import stream or service.
// e.g.
// {stream: "public.>"} # No accounts means public.
// {stream: "synadia.private.>", accounts: [cncf, natsio]}
// {service: "pub.request"} # No accounts means public.
// {service: "pub.special.request", accounts: [nats.io]}
func parseExportStreamOrService(v interface{}, errors, warnings *[]error) (*export, *export, error) {
var (
curStream *export
curService *export
accounts []string
)
tk, v := unwrapValue(v)
vv, ok := v.(map[string]interface{})
if !ok {
return nil, nil, &configErr{tk, fmt.Sprintf("Export Items should be a map with type entry, got %T", v)}
}
for mk, mv := range vv {
tk, mv := unwrapValue(mv)
switch strings.ToLower(mk) {
case "stream":
if curService != nil {
err := &configErr{tk, fmt.Sprintf("Detected stream %q but already saw a service", mv)}
*errors = append(*errors, err)
continue
}
mvs, ok := mv.(string)
if !ok {
err := &configErr{tk, fmt.Sprintf("Expected stream name to be string, got %T", mv)}
*errors = append(*errors, err)
continue
}
curStream = &export{sub: mvs}
if accounts != nil {
curStream.accs = accounts
}
case "service":
if curStream != nil {
err := &configErr{tk, fmt.Sprintf("Detected service %q but already saw a stream", mv)}
*errors = append(*errors, err)
continue
}
mvs, ok := mv.(string)
if !ok {
err := &configErr{tk, fmt.Sprintf("Expected service name to be string, got %T", mv)}
*errors = append(*errors, err)
continue
}
curService = &export{sub: mvs}
if accounts != nil {
curService.accs = accounts
}
case "accounts":
for _, iv := range mv.([]interface{}) {
_, mv := unwrapValue(iv)
accounts = append(accounts, mv.(string))
}
if curStream != nil {
curStream.accs = accounts
} else if curService != nil {
curService.accs = accounts
}
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: mk,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
}
}
}
return curStream, curService, nil
}
// Parse an import stream or service.
// e.g.
// {stream: {account: "synadia", subject:"public.synadia"}, prefix: "imports.synadia"}
// {stream: {account: "synadia", subject:"synadia.private.*"}}
// {service: {account: "synadia", subject: "pub.special.request"}, subject: "synadia.request"}
func parseImportStreamOrService(v interface{}, errors, warnings *[]error) (*importStream, *importService, error) {
var (
curStream *importStream
curService *importService
pre, to string
)
tk, mv := unwrapValue(v)
vv, ok := mv.(map[string]interface{})
if !ok {
return nil, nil, &configErr{tk, fmt.Sprintf("Import Items should be a map with type entry, got %T", mv)}
}
for mk, mv := range vv {
tk, mv := unwrapValue(mv)
switch strings.ToLower(mk) {
case "stream":
if curService != nil {
err := &configErr{tk, fmt.Sprintf("Detected stream but already saw a service")}
*errors = append(*errors, err)
continue
}
ac, ok := mv.(map[string]interface{})
if !ok {
err := &configErr{tk, fmt.Sprintf("Stream entry should be an account map, got %T", mv)}
*errors = append(*errors, err)
continue
}
// Make sure this is a map with account and subject
accountName, subject, err := parseAccount(ac, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
if accountName == "" || subject == "" {
err := &configErr{tk, fmt.Sprintf("Expect an account name and a subject")}
*errors = append(*errors, err)
continue
}
curStream = &importStream{an: accountName, sub: subject}
if pre != "" {
curStream.pre = pre
}
case "service":
if curStream != nil {
err := &configErr{tk, fmt.Sprintf("Detected service but already saw a stream")}
*errors = append(*errors, err)
continue
}
ac, ok := mv.(map[string]interface{})
if !ok {
err := &configErr{tk, fmt.Sprintf("Service entry should be an account map, got %T", mv)}
*errors = append(*errors, err)
continue
}
// Make sure this is a map with account and subject
accountName, subject, err := parseAccount(ac, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
if accountName == "" || subject == "" {
err := &configErr{tk, fmt.Sprintf("Expect an account name and a subject")}
*errors = append(*errors, err)
continue
}
curService = &importService{an: accountName, sub: subject}
if to != "" {
curService.to = to
}
case "prefix":
pre = mv.(string)
if curStream != nil {
curStream.pre = pre
}
case "to":
to = mv.(string)
if curService != nil {
curService.to = to
}
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: mk,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
}
}
}
return curStream, curService, nil
}
// Helper function to parse Authorization configs.
func parseAuthorization(v interface{}, opts *Options, errors *[]error, warnings *[]error) (*authorization, error) {
var (
am map[string]interface{}
tk token
auth = &authorization{}
)
_, v = unwrapValue(v)
am = v.(map[string]interface{})
for mk, mv := range am {
tk, mv = unwrapValue(mv)
switch strings.ToLower(mk) {
case "user", "username":
auth.user = mv.(string)
case "pass", "password":
auth.pass = mv.(string)
case "token":
auth.token = mv.(string)
case "timeout":
at := float64(1)
switch mv.(type) {
case int64:
at = float64(mv.(int64))
case float64:
at = mv.(float64)
}
auth.timeout = at
case "users":
nkeys, users, err := parseUsers(tk, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
auth.users = users
auth.nkeys = nkeys
case "default_permission", "default_permissions", "permissions":
permissions, err := parseUserPermissions(tk, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
auth.defaultPermissions = permissions
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: mk,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
}
continue
}
// Now check for permission defaults with multiple users, etc.
if auth.users != nil && auth.defaultPermissions != nil {
for _, user := range auth.users {
if user.Permissions == nil {
user.Permissions = auth.defaultPermissions
}
}
}
}
return auth, nil
}
// Helper function to parse multiple users array with optional permissions.
func parseUsers(mv interface{}, opts *Options, errors *[]error, warnings *[]error) ([]*NkeyUser, []*User, error) {
var (
tk token
keys []*NkeyUser
users = []*User{}
)
tk, mv = unwrapValue(mv)
// Make sure we have an array
uv, ok := mv.([]interface{})
if !ok {
return nil, nil, &configErr{tk, fmt.Sprintf("Expected users field to be an array, got %v", mv)}
}
for _, u := range uv {
tk, u = unwrapValue(u)
// Check its a map/struct
um, ok := u.(map[string]interface{})
if !ok {
err := &configErr{tk, fmt.Sprintf("Expected user entry to be a map/struct, got %v", u)}
*errors = append(*errors, err)
continue
}
var (
user = &User{}
nkey = &NkeyUser{}
perms *Permissions
err error
)
for k, v := range um {
// Also needs to unwrap first
tk, v = unwrapValue(v)
switch strings.ToLower(k) {
case "nkey":
nkey.Nkey = v.(string)
case "user", "username":
user.Username = v.(string)
case "pass", "password":
user.Password = v.(string)
case "permission", "permissions", "authorization":
perms, err = parseUserPermissions(tk, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
default:
if !tk.IsUsedVariable() {
err := &unknownConfigFieldErr{
field: k,
configErr: configErr{
token: tk,
},
}
*errors = append(*errors, err)
continue
}
}
}
// Place perms if we have them.
if perms != nil {
// nkey takes precedent.
if nkey.Nkey != "" {
nkey.Permissions = perms
} else {
user.Permissions = perms
}
}
// Check to make sure we have at least username and password if defined.
if nkey.Nkey == "" && (user.Username == "" || user.Password == "") {
return nil, nil, &configErr{tk, fmt.Sprintf("User entry requires a user and a password")}
} else if nkey.Nkey != "" {
// Make sure the nkey a proper public nkey for a user..
if !nkeys.IsValidPublicUserKey([]byte(nkey.Nkey)) {
return nil, nil, &configErr{tk, fmt.Sprintf("Not a valid public nkey for a user")}
}
// If we have user or password defined here that is an error.
if user.Username != "" || user.Password != "" {
return nil, nil, &configErr{tk, fmt.Sprintf("Nkey users do not take usernames or passwords")}
}
keys = append(keys, nkey)
} else {
users = append(users, user)
}
}
return keys, users, nil
}
// Helper function to parse user/account permissions
func parseUserPermissions(mv interface{}, opts *Options, errors, warnings *[]error) (*Permissions, error) {
var (
tk token
p = &Permissions{}
)
tk, mv = unwrapValue(mv)
pm, ok := mv.(map[string]interface{})
if !ok {
return nil, &configErr{tk, fmt.Sprintf("Expected permissions to be a map/struct, got %+v", mv)}
}
for k, v := range pm {
tk, v = unwrapValue(v)
switch strings.ToLower(k) {
// For routes:
// Import is Publish
// Export is Subscribe
case "pub", "publish", "import":
perms, err := parseVariablePermissions(v, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
p.Publish = perms
case "sub", "subscribe", "export":
perms, err := parseVariablePermissions(v, opts, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
p.Subscribe = perms
default:
if !tk.IsUsedVariable() {
err := &configErr{tk, fmt.Sprintf("Unknown field %q parsing permissions", k)}
*errors = append(*errors, err)
}
}
}
return p, nil
}
// Top level parser for authorization configurations.
func parseVariablePermissions(v interface{}, opts *Options, errors, warnings *[]error) (*SubjectPermission, error) {
switch vv := v.(type) {
case map[string]interface{}:
// New style with allow and/or deny properties.
return parseSubjectPermission(vv, opts, errors, warnings)
default:
// Old style
return parseOldPermissionStyle(v, errors, warnings)
}
}
// Helper function to parse subject singeltons and/or arrays
func parseSubjects(v interface{}, errors, warnings *[]error) ([]string, error) {
tk, v := unwrapValue(v)
var subjects []string
switch vv := v.(type) {
case string:
subjects = append(subjects, vv)
case []string:
subjects = vv
case []interface{}:
for _, i := range vv {
tk, i := unwrapValue(i)
subject, ok := i.(string)
if !ok {
return nil, &configErr{tk, fmt.Sprintf("Subject in permissions array cannot be cast to string")}
}
subjects = append(subjects, subject)
}
default:
return nil, &configErr{tk, fmt.Sprintf("Expected subject permissions to be a subject, or array of subjects, got %T", v)}
}
if err := checkSubjectArray(subjects); err != nil {
return nil, &configErr{tk, err.Error()}
}
return subjects, nil
}
// Helper function to parse old style authorization configs.
func parseOldPermissionStyle(v interface{}, errors, warnings *[]error) (*SubjectPermission, error) {
subjects, err := parseSubjects(v, errors, warnings)
if err != nil {
return nil, err
}
return &SubjectPermission{Allow: subjects}, nil
}
// Helper function to parse new style authorization into a SubjectPermission with Allow and Deny.
func parseSubjectPermission(v interface{}, opts *Options, errors, warnings *[]error) (*SubjectPermission, error) {
m := v.(map[string]interface{})
if len(m) == 0 {
return nil, nil
}
p := &SubjectPermission{}
for k, v := range m {
tk, _ := unwrapValue(v)
switch strings.ToLower(k) {
case "allow":
subjects, err := parseSubjects(tk, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
p.Allow = subjects
case "deny":
subjects, err := parseSubjects(tk, errors, warnings)
if err != nil {
*errors = append(*errors, err)
continue
}
p.Deny = subjects
default:
if !tk.IsUsedVariable() {
err := &configErr{tk, fmt.Sprintf("Unknown field name %q parsing subject permissions, only 'allow' or 'deny' are permitted", k)}
*errors = append(*errors, err)
}
}
}
return p, nil
}
// Helper function to validate subjects, etc for account permissioning.
func checkSubjectArray(sa []string) error {
for _, s := range sa {
if !IsValidSubject(s) {
return fmt.Errorf("Subject %q is not a valid subject", s)
}
}
return nil
}
// PrintTLSHelpAndDie prints TLS usage and exits.
func PrintTLSHelpAndDie() {
fmt.Printf("%s", tlsUsage)
for k := range cipherMap {
fmt.Printf(" %s\n", k)
}
fmt.Printf("\nAvailable curve preferences include:\n")
for k := range curvePreferenceMap {
fmt.Printf(" %s\n", k)
}
os.Exit(0)
}
func parseCipher(cipherName string) (uint16, error) {
cipher, exists := cipherMap[cipherName]
if !exists {
return 0, fmt.Errorf("Unrecognized cipher %s", cipherName)
}
return cipher, nil
}
func parseCurvePreferences(curveName string) (tls.CurveID, error) {
curve, exists := curvePreferenceMap[curveName]
if !exists {
return 0, fmt.Errorf("Unrecognized curve preference %s", curveName)
}
return curve, nil
}
// Helper function to parse TLS configs.
func parseTLS(v interface{}, opts *Options) (*TLSConfigOpts, error) {
var (
tlsm map[string]interface{}
tc = TLSConfigOpts{}
)
_, v = unwrapValue(v)
tlsm = v.(map[string]interface{})
for mk, mv := range tlsm {
tk, mv := unwrapValue(mv)
switch strings.ToLower(mk) {
case "cert_file":
certFile, ok := mv.(string)
if !ok {
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, expected 'cert_file' to be filename")}
}
tc.CertFile = certFile
case "key_file":
keyFile, ok := mv.(string)
if !ok {
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, expected 'key_file' to be filename")}
}
tc.KeyFile = keyFile
case "ca_file":
caFile, ok := mv.(string)
if !ok {
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, expected 'ca_file' to be filename")}
}
tc.CaFile = caFile
case "verify":
verify, ok := mv.(bool)
if !ok {
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, expected 'verify' to be a boolean")}
}
tc.Verify = verify
case "cipher_suites":
ra := mv.([]interface{})
if len(ra) == 0 {
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, 'cipher_suites' cannot be empty")}
}
tc.Ciphers = make([]uint16, 0, len(ra))
for _, r := range ra {
tk, r := unwrapValue(r)
cipher, err := parseCipher(r.(string))
if err != nil {
return nil, &configErr{tk, err.Error()}
}
tc.Ciphers = append(tc.Ciphers, cipher)
}
case "curve_preferences":
ra := mv.([]interface{})
if len(ra) == 0 {
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, 'curve_preferences' cannot be empty")}
}
tc.CurvePreferences = make([]tls.CurveID, 0, len(ra))
for _, r := range ra {
tk, r := unwrapValue(r)
cps, err := parseCurvePreferences(r.(string))
if err != nil {
return nil, &configErr{tk, err.Error()}
}
tc.CurvePreferences = append(tc.CurvePreferences, cps)
}
case "timeout":
at := float64(0)
switch mv.(type) {
case int64:
at = float64(mv.(int64))
case float64:
at = mv.(float64)
}
tc.Timeout = at
default:
return nil, &configErr{tk, fmt.Sprintf("error parsing tls config, unknown field [%q]", mk)}
}
}
// If cipher suites were not specified then use the defaults
if tc.Ciphers == nil {
tc.Ciphers = defaultCipherSuites()
}
// If curve preferences were not specified, then use the defaults
if tc.CurvePreferences == nil {
tc.CurvePreferences = defaultCurvePreferences()
}
return &tc, nil
}
// GenTLSConfig loads TLS related configuration parameters.
func GenTLSConfig(tc *TLSConfigOpts) (*tls.Config, error) {
// Now load in cert and private key
cert, err := tls.LoadX509KeyPair(tc.CertFile, tc.KeyFile)
if err != nil {
return nil, fmt.Errorf("error parsing X509 certificate/key pair: %v", err)
}
cert.Leaf, err = x509.ParseCertificate(cert.Certificate[0])
if err != nil {
return nil, fmt.Errorf("error parsing certificate: %v", err)
}
// Create the tls.Config from our options.
// We will determine the cipher suites that we prefer.
// FIXME(dlc) change if ARM based.
config := tls.Config{
MinVersion: tls.VersionTLS12,
CipherSuites: tc.Ciphers,
PreferServerCipherSuites: true,
CurvePreferences: tc.CurvePreferences,
Certificates: []tls.Certificate{cert},
}
// Require client certificates as needed
if tc.Verify {
config.ClientAuth = tls.RequireAndVerifyClientCert
}
// Add in CAs if applicable.
if tc.CaFile != "" {
rootPEM, err := ioutil.ReadFile(tc.CaFile)
if err != nil || rootPEM == nil {
return nil, err
}
pool := x509.NewCertPool()
ok := pool.AppendCertsFromPEM(rootPEM)
if !ok {
return nil, fmt.Errorf("failed to parse root ca certificate")
}
config.ClientCAs = pool
}
return &config, nil
}
// MergeOptions will merge two options giving preference to the flagOpts
// if the item is present.
func MergeOptions(fileOpts, flagOpts *Options) *Options {
if fileOpts == nil {
return flagOpts
}
if flagOpts == nil {
return fileOpts
}
// Merge the two, flagOpts override
opts := *fileOpts
if flagOpts.Port != 0 {
opts.Port = flagOpts.Port
}
if flagOpts.Host != "" {
opts.Host = flagOpts.Host
}
if flagOpts.ClientAdvertise != "" {
opts.ClientAdvertise = flagOpts.ClientAdvertise
}
if flagOpts.Username != "" {
opts.Username = flagOpts.Username
}
if flagOpts.Password != "" {
opts.Password = flagOpts.Password
}
if flagOpts.Authorization != "" {
opts.Authorization = flagOpts.Authorization
}
if flagOpts.HTTPPort != 0 {
opts.HTTPPort = flagOpts.HTTPPort
}
if flagOpts.Debug {
opts.Debug = true
}
if flagOpts.Trace {
opts.Trace = true
}
if flagOpts.Logtime {
opts.Logtime = true
}
if flagOpts.LogFile != "" {
opts.LogFile = flagOpts.LogFile
}
if flagOpts.PidFile != "" {
opts.PidFile = flagOpts.PidFile
}
if flagOpts.PortsFileDir != "" {
opts.PortsFileDir = flagOpts.PortsFileDir
}
if flagOpts.ProfPort != 0 {
opts.ProfPort = flagOpts.ProfPort
}
if flagOpts.Cluster.ListenStr != "" {
opts.Cluster.ListenStr = flagOpts.Cluster.ListenStr
}
if flagOpts.Cluster.NoAdvertise {
opts.Cluster.NoAdvertise = true
}
if flagOpts.Cluster.ConnectRetries != 0 {
opts.Cluster.ConnectRetries = flagOpts.Cluster.ConnectRetries
}
if flagOpts.Cluster.Advertise != "" {
opts.Cluster.Advertise = flagOpts.Cluster.Advertise
}
if flagOpts.RoutesStr != "" {
mergeRoutes(&opts, flagOpts)
}
return &opts
}
// RoutesFromStr parses route URLs from a string
func RoutesFromStr(routesStr string) []*url.URL {
routes := strings.Split(routesStr, ",")
if len(routes) == 0 {
return nil
}
routeUrls := []*url.URL{}
for _, r := range routes {
r = strings.TrimSpace(r)
u, _ := url.Parse(r)
routeUrls = append(routeUrls, u)
}
return routeUrls
}
// This will merge the flag routes and override anything that was present.
func mergeRoutes(opts, flagOpts *Options) {
routeUrls := RoutesFromStr(flagOpts.RoutesStr)
if routeUrls == nil {
return
}
opts.Routes = routeUrls
opts.RoutesStr = flagOpts.RoutesStr
}
// RemoveSelfReference removes this server from an array of routes
func RemoveSelfReference(clusterPort int, routes []*url.URL) ([]*url.URL, error) {
var cleanRoutes []*url.URL
cport := strconv.Itoa(clusterPort)
selfIPs, err := getInterfaceIPs()
if err != nil {
return nil, err
}
for _, r := range routes {
host, port, err := net.SplitHostPort(r.Host)
if err != nil {
return nil, err
}
ipList, err := getURLIP(host)
if err != nil {
return nil, err
}
if cport == port && isIPInList(selfIPs, ipList) {
continue
}
cleanRoutes = append(cleanRoutes, r)
}
return cleanRoutes, nil
}
func isIPInList(list1 []net.IP, list2 []net.IP) bool {
for _, ip1 := range list1 {
for _, ip2 := range list2 {
if ip1.Equal(ip2) {
return true
}
}
}
return false
}
func getURLIP(ipStr string) ([]net.IP, error) {
ipList := []net.IP{}
ip := net.ParseIP(ipStr)
if ip != nil {
ipList = append(ipList, ip)
return ipList, nil
}
hostAddr, err := net.LookupHost(ipStr)
if err != nil {
return nil, fmt.Errorf("Error looking up host with route hostname: %v", err)
}
for _, addr := range hostAddr {
ip = net.ParseIP(addr)
if ip != nil {
ipList = append(ipList, ip)
}
}
return ipList, nil
}
func getInterfaceIPs() ([]net.IP, error) {
var localIPs []net.IP
interfaceAddr, err := net.InterfaceAddrs()
if err != nil {
return nil, fmt.Errorf("Error getting self referencing address: %v", err)
}
for i := 0; i < len(interfaceAddr); i++ {
interfaceIP, _, _ := net.ParseCIDR(interfaceAddr[i].String())
if net.ParseIP(interfaceIP.String()) != nil {
localIPs = append(localIPs, interfaceIP)
} else {
return nil, fmt.Errorf("Error parsing self referencing address: %v", err)
}
}
return localIPs, nil
}
func processOptions(opts *Options) {
// Setup non-standard Go defaults
if opts.Host == "" {
opts.Host = DEFAULT_HOST
}
if opts.HTTPHost == "" {
// Default to same bind from server if left undefined
opts.HTTPHost = opts.Host
}
if opts.Port == 0 {
opts.Port = DEFAULT_PORT
} else if opts.Port == RANDOM_PORT {
// Choose randomly inside of net.Listen
opts.Port = 0
}
if opts.MaxConn == 0 {
opts.MaxConn = DEFAULT_MAX_CONNECTIONS
}
if opts.PingInterval == 0 {
opts.PingInterval = DEFAULT_PING_INTERVAL
}
if opts.MaxPingsOut == 0 {
opts.MaxPingsOut = DEFAULT_PING_MAX_OUT
}
if opts.TLSTimeout == 0 {
opts.TLSTimeout = float64(TLS_TIMEOUT) / float64(time.Second)
}
if opts.AuthTimeout == 0 {
opts.AuthTimeout = float64(AUTH_TIMEOUT) / float64(time.Second)
}
if opts.Cluster.Port != 0 {
if opts.Cluster.Host == "" {
opts.Cluster.Host = DEFAULT_HOST
}
if opts.Cluster.TLSTimeout == 0 {
opts.Cluster.TLSTimeout = float64(TLS_TIMEOUT) / float64(time.Second)
}
if opts.Cluster.AuthTimeout == 0 {
opts.Cluster.AuthTimeout = float64(AUTH_TIMEOUT) / float64(time.Second)
}
}
if opts.MaxControlLine == 0 {
opts.MaxControlLine = MAX_CONTROL_LINE_SIZE
}
if opts.MaxPayload == 0 {
opts.MaxPayload = MAX_PAYLOAD_SIZE
}
if opts.MaxPending == 0 {
opts.MaxPending = MAX_PENDING_SIZE
}
if opts.WriteDeadline == time.Duration(0) {
opts.WriteDeadline = DEFAULT_FLUSH_DEADLINE
}
if opts.RQSubsSweep == time.Duration(0) {
opts.RQSubsSweep = DEFAULT_REMOTE_QSUBS_SWEEPER
}
if opts.MaxClosedClients == 0 {
opts.MaxClosedClients = DEFAULT_MAX_CLOSED_CLIENTS
}
if opts.LameDuckDuration == 0 {
opts.LameDuckDuration = DEFAULT_LAME_DUCK_DURATION
}
}
// ConfigureOptions accepts a flag set and augment it with NATS Server
// specific flags. On success, an options structure is returned configured
// based on the selected flags and/or configuration file.
// The command line options take precedence to the ones in the configuration file.
func ConfigureOptions(fs *flag.FlagSet, args []string, printVersion, printHelp, printTLSHelp func()) (*Options, error) {
opts := &Options{}
var (
showVersion bool
showHelp bool
showTLSHelp bool
signal string
configFile string
err error
)
fs.BoolVar(&showHelp, "h", false, "Show this message.")
fs.BoolVar(&showHelp, "help", false, "Show this message.")
fs.IntVar(&opts.Port, "port", 0, "Port to listen on.")
fs.IntVar(&opts.Port, "p", 0, "Port to listen on.")
fs.StringVar(&opts.Host, "addr", "", "Network host to listen on.")
fs.StringVar(&opts.Host, "a", "", "Network host to listen on.")
fs.StringVar(&opts.Host, "net", "", "Network host to listen on.")
fs.StringVar(&opts.ClientAdvertise, "client_advertise", "", "Client URL to advertise to other servers.")
fs.BoolVar(&opts.Debug, "D", false, "Enable Debug logging.")
fs.BoolVar(&opts.Debug, "debug", false, "Enable Debug logging.")
fs.BoolVar(&opts.Trace, "V", false, "Enable Trace logging.")
fs.BoolVar(&opts.Trace, "trace", false, "Enable Trace logging.")
fs.Bool("DV", false, "Enable Debug and Trace logging.")
fs.BoolVar(&opts.Logtime, "T", true, "Timestamp log entries.")
fs.BoolVar(&opts.Logtime, "logtime", true, "Timestamp log entries.")
fs.StringVar(&opts.Username, "user", "", "Username required for connection.")
fs.StringVar(&opts.Password, "pass", "", "Password required for connection.")
fs.StringVar(&opts.Authorization, "auth", "", "Authorization token required for connection.")
fs.IntVar(&opts.HTTPPort, "m", 0, "HTTP Port for /varz, /connz endpoints.")
fs.IntVar(&opts.HTTPPort, "http_port", 0, "HTTP Port for /varz, /connz endpoints.")
fs.IntVar(&opts.HTTPSPort, "ms", 0, "HTTPS Port for /varz, /connz endpoints.")
fs.IntVar(&opts.HTTPSPort, "https_port", 0, "HTTPS Port for /varz, /connz endpoints.")
fs.StringVar(&configFile, "c", "", "Configuration file.")
fs.StringVar(&configFile, "config", "", "Configuration file.")
fs.BoolVar(&opts.CheckConfig, "t", false, "Check configuration and exit.")
fs.StringVar(&signal, "sl", "", "Send signal to gnatsd process (stop, quit, reopen, reload)")
fs.StringVar(&signal, "signal", "", "Send signal to gnatsd process (stop, quit, reopen, reload)")
fs.StringVar(&opts.PidFile, "P", "", "File to store process pid.")
fs.StringVar(&opts.PidFile, "pid", "", "File to store process pid.")
fs.StringVar(&opts.PortsFileDir, "ports_file_dir", "", "Creates a ports file in the specified directory (<executable_name>_<pid>.ports)")
fs.StringVar(&opts.LogFile, "l", "", "File to store logging output.")
fs.StringVar(&opts.LogFile, "log", "", "File to store logging output.")
fs.BoolVar(&opts.Syslog, "s", false, "Enable syslog as log method.")
fs.BoolVar(&opts.Syslog, "syslog", false, "Enable syslog as log method..")
fs.StringVar(&opts.RemoteSyslog, "r", "", "Syslog server addr (udp://127.0.0.1:514).")
fs.StringVar(&opts.RemoteSyslog, "remote_syslog", "", "Syslog server addr (udp://127.0.0.1:514).")
fs.BoolVar(&showVersion, "version", false, "Print version information.")
fs.BoolVar(&showVersion, "v", false, "Print version information.")
fs.IntVar(&opts.ProfPort, "profile", 0, "Profiling HTTP port")
fs.StringVar(&opts.RoutesStr, "routes", "", "Routes to actively solicit a connection.")
fs.StringVar(&opts.Cluster.ListenStr, "cluster", "", "Cluster url from which members can solicit routes.")
fs.StringVar(&opts.Cluster.ListenStr, "cluster_listen", "", "Cluster url from which members can solicit routes.")
fs.StringVar(&opts.Cluster.Advertise, "cluster_advertise", "", "Cluster URL to advertise to other servers.")
fs.BoolVar(&opts.Cluster.NoAdvertise, "no_advertise", false, "Advertise known cluster IPs to clients.")
fs.IntVar(&opts.Cluster.ConnectRetries, "connect_retries", 0, "For implicit routes, number of connect retries")
fs.BoolVar(&showTLSHelp, "help_tls", false, "TLS help.")
fs.BoolVar(&opts.TLS, "tls", false, "Enable TLS.")
fs.BoolVar(&opts.TLSVerify, "tlsverify", false, "Enable TLS with client verification.")
fs.StringVar(&opts.TLSCert, "tlscert", "", "Server certificate file.")
fs.StringVar(&opts.TLSKey, "tlskey", "", "Private key for server certificate.")
fs.StringVar(&opts.TLSCaCert, "tlscacert", "", "Client certificate CA for verification.")
// The flags definition above set "default" values to some of the options.
// Calling Parse() here will override the default options with any value
// specified from the command line. This is ok. We will then update the
// options with the content of the configuration file (if present), and then,
// call Parse() again to override the default+config with command line values.
// Calling Parse() before processing config file is necessary since configFile
// itself is a command line argument, and also Parse() is required in order
// to know if user wants simply to show "help" or "version", etc...
if err := fs.Parse(args); err != nil {
return nil, err
}
if showVersion {
printVersion()
return nil, nil
}
if showHelp {
printHelp()
return nil, nil
}
if showTLSHelp {
printTLSHelp()
return nil, nil
}
// Process args looking for non-flag options,
// 'version' and 'help' only for now
showVersion, showHelp, err = ProcessCommandLineArgs(fs)
if err != nil {
return nil, err
} else if showVersion {
printVersion()
return nil, nil
} else if showHelp {
printHelp()
return nil, nil
}
// Snapshot flag options.
FlagSnapshot = opts.Clone()
// Process signal control.
if signal != "" {
if err := processSignal(signal); err != nil {
return nil, err
}
}
// Parse config if given
if configFile != "" {
// This will update the options with values from the config file.
err := opts.ProcessConfigFile(configFile)
if err != nil {
if opts.CheckConfig {
return nil, err
}
// If only warnings then can still continue.
if cerr, ok := err.(*processConfigErr); ok && len(cerr.Errors()) == 0 {
fmt.Fprint(os.Stderr, err)
return opts, nil
}
return nil, err
} else if opts.CheckConfig {
// Report configuration file syntax test was successful and exit.
return opts, nil
}
// Call this again to override config file options with options from command line.
// Note: We don't need to check error here since if there was an error, it would
// have been caught the first time this function was called (after setting up the
// flags).
fs.Parse(args)
} else if opts.CheckConfig {
return nil, fmt.Errorf("must specify [-c, --config] option to check configuration file syntax")
}
// Special handling of some flags
var (
flagErr error
tlsDisabled bool
tlsOverride bool
)
fs.Visit(func(f *flag.Flag) {
// short-circuit if an error was encountered
if flagErr != nil {
return
}
if strings.HasPrefix(f.Name, "tls") {
if f.Name == "tls" {
if !opts.TLS {
// User has specified "-tls=false", we need to disable TLS
opts.TLSConfig = nil
tlsDisabled = true
tlsOverride = false
return
}
tlsOverride = true
} else if !tlsDisabled {
tlsOverride = true
}
} else {
switch f.Name {
case "DV":
// Check value to support -DV=false
boolValue, _ := strconv.ParseBool(f.Value.String())
opts.Trace, opts.Debug = boolValue, boolValue
case "cluster", "cluster_listen":
// Override cluster config if explicitly set via flags.
flagErr = overrideCluster(opts)
case "routes":
// Keep in mind that the flag has updated opts.RoutesStr at this point.
if opts.RoutesStr == "" {
// Set routes array to nil since routes string is empty
opts.Routes = nil
return
}
routeUrls := RoutesFromStr(opts.RoutesStr)
opts.Routes = routeUrls
}
}
})
if flagErr != nil {
return nil, flagErr
}
// This will be true if some of the `-tls` params have been set and
// `-tls=false` has not been set.
if tlsOverride {
if err := overrideTLS(opts); err != nil {
return nil, err
}
}
// If we don't have cluster defined in the configuration
// file and no cluster listen string override, but we do
// have a routes override, we need to report misconfiguration.
if opts.RoutesStr != "" && opts.Cluster.ListenStr == "" && opts.Cluster.Host == "" && opts.Cluster.Port == 0 {
return nil, errors.New("solicited routes require cluster capabilities, e.g. --cluster")
}
return opts, nil
}
// overrideTLS is called when at least "-tls=true" has been set.
func overrideTLS(opts *Options) error {
if opts.TLSCert == "" {
return errors.New("TLS Server certificate must be present and valid")
}
if opts.TLSKey == "" {
return errors.New("TLS Server private key must be present and valid")
}
tc := TLSConfigOpts{}
tc.CertFile = opts.TLSCert
tc.KeyFile = opts.TLSKey
tc.CaFile = opts.TLSCaCert
tc.Verify = opts.TLSVerify
var err error
opts.TLSConfig, err = GenTLSConfig(&tc)
return err
}
// overrideCluster updates Options.Cluster if that flag "cluster" (or "cluster_listen")
// has explicitly be set in the command line. If it is set to empty string, it will
// clear the Cluster options.
func overrideCluster(opts *Options) error {
if opts.Cluster.ListenStr == "" {
// This one is enough to disable clustering.
opts.Cluster.Port = 0
return nil
}
clusterURL, err := url.Parse(opts.Cluster.ListenStr)
if err != nil {
return err
}
h, p, err := net.SplitHostPort(clusterURL.Host)
if err != nil {
return err
}
opts.Cluster.Host = h
_, err = fmt.Sscan(p, &opts.Cluster.Port)
if err != nil {
return err
}
if clusterURL.User != nil {
pass, hasPassword := clusterURL.User.Password()
if !hasPassword {
return errors.New("expected cluster password to be set")
}
opts.Cluster.Password = pass
user := clusterURL.User.Username()
opts.Cluster.Username = user
} else {
// Since we override from flag and there is no user/pwd, make
// sure we clear what we may have gotten from config file.
opts.Cluster.Username = ""
opts.Cluster.Password = ""
}
return nil
}
func processSignal(signal string) error {
var (
pid string
commandAndPid = strings.Split(signal, "=")
)
if l := len(commandAndPid); l == 2 {
pid = commandAndPid[1]
} else if l > 2 {
return fmt.Errorf("invalid signal parameters: %v", commandAndPid[2:])
}
if err := ProcessSignal(Command(commandAndPid[0]), pid); err != nil {
return err
}
os.Exit(0)
return nil
}
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