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|
package config
import (
"encoding/json"
"fmt"
"io"
"log"
"net"
"os"
"codeberg.org/snonux/gorum/internal/utils"
)
type Node struct {
Port int
Priority int
Alias string `json:",omitempty"`
Hostname string
originalId string
}
func (n Node) Address() string {
return fmt.Sprintf("%s:%d", n.Hostname, n.Port)
}
type Config struct {
StateDir string
LogToSyslog bool `json:"LogToSyslog,omitempty"`
ScoreFile string
Address string
Nodes map[string]Node
LoopIntervalS int64 `json:"LoopIntervalS,omitempty"`
MyID string `json:"MyID,omitempty"`
RelaxedMode bool `json:"RelaxedMode,omitempty"`
EmailTo string `json:"EmailTo,omitempty"`
EmailFrom string `json:"EmailFrom,omitempty"`
SMTPServer string `json:"SMTPServer,omitempty"`
MailThrottle int `json:"MailThrottle,omitempty"`
}
func NewFromConfigFile(configFile string) (Config, error) {
var conf Config
file, err := os.Open(configFile)
if err != nil {
return conf, err
}
defer file.Close()
bytes, err := io.ReadAll(file)
if err != nil {
return conf, err
}
err = json.Unmarshal(bytes, &conf)
if err != nil {
return conf, err
}
// Make it so that the key is the Hostname for internal lookup.
newNodes := make(map[string]Node, len(conf.Nodes))
for id, node := range conf.Nodes {
log.Printf("adding node %s: %v", id, node)
node.originalId = id
if node.Alias != "" {
newNodes[node.Alias] = node
continue
}
newNodes[node.Hostname] = node
}
conf.Nodes = newNodes
if conf.SMTPServer == "" {
hostname, err := os.Hostname()
if err != nil {
log.Fatal(err)
}
conf.SMTPServer = fmt.Sprintf("%s:25", hostname)
log.Println("Set SMTPServer to " + conf.SMTPServer)
}
if conf.MailThrottle == 0 {
// By default, send out an E-Mail once every minute max. This
// is to avoid E-Mail bursts.
conf.MailThrottle = 60
}
return conf.setDefaults()
}
func New(options ...func(*Config)) (Config, error) {
var conf Config
for _, opt := range options {
opt(&conf)
}
return conf.setDefaults()
}
func WithStateDir(stateDir string) func(*Config) {
return func(conf *Config) {
conf.StateDir = stateDir
}
}
func WithAddress(address string) func(*Config) {
return func(conf *Config) {
conf.Address = address
}
}
func WithNodes(nodes ...Node) func(*Config) {
return func(conf *Config) {
if conf.Nodes == nil {
conf.Nodes = make(map[string]Node)
}
for _, node := range nodes {
conf.Nodes[node.Hostname] = node
}
}
}
func WithMyID(id string) func(*Config) {
return func(conf *Config) {
conf.MyID = id
}
}
func WithRelaxedMode() func(*Config) {
return func(conf *Config) {
conf.RelaxedMode = true
}
}
func (conf Config) setDefaults() (Config, error) {
if conf.ScoreFile == "" {
conf.ScoreFile = "scores"
}
if conf.LoopIntervalS == 0 {
conf.LoopIntervalS = 10
}
if conf.MyID == "" {
hostname, err := os.Hostname()
if err != nil {
return conf, err
}
conf.MyID = hostname
}
return conf, nil
}
func (conf Config) NodePriority(id string) (int, error) {
node, err := conf.findNode(id)
if err != nil {
return 0, err
}
return node.Priority, nil
}
func (conf Config) IsNode(remoteAddr string) bool {
_, err := conf.findNode(utils.StripPort(remoteAddr))
return err == nil
}
func (conf Config) IsNodeWithLookup(remoteAddr string,
lookupIP func(string) ([]net.IP, error)) bool {
remoteAddr = utils.StripPort(remoteAddr)
compare := func(hostname string) bool {
ips, err := lookupIP(hostname)
if err != nil {
log.Println("config:", err)
return false
}
for _, ip := range ips {
if remoteAddr == ip.String() {
return true
}
}
return false
}
for _, node := range conf.Nodes {
if compare(node.Hostname) || compare(node.Alias) {
return true
}
}
return false
}
func (conf Config) findNode(hostname string) (Node, error) {
if node, ok := conf.Nodes[hostname]; ok {
return node, nil
}
for _, node := range conf.Nodes {
if hostname == node.Alias {
return node, nil
}
}
return Node{}, fmt.Errorf("node %s not found in %v", hostname, conf.Nodes)
}
func (conf Config) EmailNotifycationEnabled() bool {
return conf.EmailFrom != "" && conf.EmailTo != "" && conf.SMTPServer != ""
}
|
