41 lines
897 B
Go
41 lines
897 B
Go
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package conf
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// Plan 9 stores its network data in /net/ndb, which seems to be formatted a specific way
|
|
// Yoink it and use it.
|
|
//
|
|
// See ndb(7).
|
|
func GetPlan9Config(str string) (*dns.ClientConfig, error) {
|
|
str = strings.ReplaceAll(str, "\n", "")
|
|
spl := strings.FieldsFunc(str, splitChars)
|
|
var servers []string
|
|
for _, option := range spl {
|
|
if strings.HasPrefix(option, "dns=") {
|
|
servers = append(servers, strings.TrimPrefix(option, "dns="))
|
|
}
|
|
}
|
|
if len(servers) == 0 {
|
|
return nil, fmt.Errorf("plan9: no DNS servers found")
|
|
}
|
|
|
|
// TODO: read more about how customizable Plan 9 is
|
|
return &dns.ClientConfig{
|
|
Servers: servers,
|
|
Search: []string{},
|
|
Port: "53",
|
|
}, nil
|
|
}
|
|
|
|
// Split the string at either space or tabs.
|
|
func splitChars(r rune) bool {
|
|
return r == ' ' || r == '\t'
|
|
}
|