Thomas Preisner
76286b6388
All checks were successful
continuous-integration/drone/push Build is passing
Iterating over a slice returns a copy of the respective member instead of a reference to the original slice member. Thus, any modification are discarded and the pointers saved inside cfg.users and cfg.rrconfigs are incorrect, too.
117 lines
3 KiB
Go
117 lines
3 KiB
Go
package main
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import (
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"fmt"
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"github.com/pelletier/go-toml"
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"os"
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)
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type Config struct {
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ServerPort uint16 `toml:"port"`
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Users []User `toml:"user"`
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RRConfigs []RRConfig `toml:"rrconfig"`
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users map[string]*User
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rrconfigs map[string]*RRConfig
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}
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type User struct {
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Username string `toml:"username"`
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Password string `toml:"password"`
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Records []string `toml:"records"`
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records map[string]bool
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}
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type RRConfig struct {
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Recordname string `toml:"recordname"`
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Zonename string `toml:"zonename"`
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Nameserver string `toml:"nameserver"`
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Tsigalgo string `toml:"tsig_algo"`
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Tsigid string `toml:"tsig_id"`
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Tsigkey string `toml:"tsig_key"`
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Ttl int `toml:"ttl" default:"60"`
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}
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func LoadConfig(path string) (*Config, error) {
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var cfg Config
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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decoder := toml.NewDecoder(f).Strict(true)
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err = decoder.Decode(&cfg)
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if err != nil {
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return nil, err
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}
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return prepareConfig(&cfg)
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}
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func prepareConfig(cfg *Config) (*Config, error) {
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if len(cfg.Users) <= 0 || len(cfg.RRConfigs) <= 0 {
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return nil, fmt.Errorf("No users or resource record configs present.")
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}
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// temporary map for detecting duplicated or orphaned entries between
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// records and users
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globRecords := map[string]bool{}
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// populate user map
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cfg.users = map[string]*User{}
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for u := range cfg.Users {
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user := &cfg.Users[u]
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if _, ok := cfg.users[user.Username]; ok {
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return nil, fmt.Errorf("Duplicate username detected: %s", user.Username)
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}
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// initialize and populate user.records map
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user.records = make(map[string]bool)
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if len(user.Records) <= 0 {
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return nil, fmt.Errorf("User without records detected: %s", user.Username)
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}
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for _, record := range user.Records {
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// check for duplicate records
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if globRecords[record] {
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return nil, fmt.Errorf("Record associated with multiple users detected: %s", record)
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}
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// memorize record both in the user as well as in the temporary map
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user.records[record] = true
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globRecords[record] = true
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}
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cfg.users[user.Username] = user
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}
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// populate record map
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cfg.rrconfigs = map[string]*RRConfig{}
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for r := range cfg.RRConfigs {
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record := &cfg.RRConfigs[r]
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// check for duplicate record before verifying association to users
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if _, ok := cfg.rrconfigs[record.Recordname]; ok {
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return nil, fmt.Errorf("Duplicate record detected: %s", record.Recordname)
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}
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if !globRecords[record.Recordname] {
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return nil, fmt.Errorf("Record without associated user detected: %s", record.Recordname)
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}
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// need to remove record from globRecords for detecting orphaned records
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delete(globRecords, record.Recordname)
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cfg.rrconfigs[record.Recordname] = record
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}
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// check whether all records have been processed
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if len(globRecords) > 0 {
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missing := make([]string, len(globRecords))
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i := 0
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for k := range globRecords {
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missing[i] = k
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i++
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}
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return nil, fmt.Errorf("Records associated to user missing: %v", missing)
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}
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return cfg, nil
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}
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