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path: root/src/pkg/net/dnsconfig_unix.go
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Diffstat (limited to 'src/pkg/net/dnsconfig_unix.go')
-rw-r--r--src/pkg/net/dnsconfig_unix.go109
1 files changed, 0 insertions, 109 deletions
diff --git a/src/pkg/net/dnsconfig_unix.go b/src/pkg/net/dnsconfig_unix.go
deleted file mode 100644
index db45716f1..000000000
--- a/src/pkg/net/dnsconfig_unix.go
+++ /dev/null
@@ -1,109 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
-
-// Read system DNS config from /etc/resolv.conf
-
-package net
-
-type dnsConfig struct {
- servers []string // servers to use
- search []string // suffixes to append to local name
- ndots int // number of dots in name to trigger absolute lookup
- timeout int // seconds before giving up on packet
- attempts int // lost packets before giving up on server
- rotate bool // round robin among servers
-}
-
-// See resolv.conf(5) on a Linux machine.
-// TODO(rsc): Supposed to call uname() and chop the beginning
-// of the host name to get the default search domain.
-func dnsReadConfig(filename string) (*dnsConfig, error) {
- file, err := open(filename)
- if err != nil {
- return nil, &DNSConfigError{err}
- }
- conf := new(dnsConfig)
- conf.servers = make([]string, 0, 3) // small, but the standard limit
- conf.search = make([]string, 0)
- conf.ndots = 1
- conf.timeout = 5
- conf.attempts = 2
- conf.rotate = false
- for line, ok := file.readLine(); ok; line, ok = file.readLine() {
- f := getFields(line)
- if len(f) < 1 {
- continue
- }
- switch f[0] {
- case "nameserver": // add one name server
- a := conf.servers
- n := len(a)
- if len(f) > 1 && n < cap(a) {
- // One more check: make sure server name is
- // just an IP address. Otherwise we need DNS
- // to look it up.
- name := f[1]
- switch len(ParseIP(name)) {
- case 16:
- name = "[" + name + "]"
- fallthrough
- case 4:
- a = a[0 : n+1]
- a[n] = name
- conf.servers = a
- }
- }
-
- case "domain": // set search path to just this domain
- if len(f) > 1 {
- conf.search = make([]string, 1)
- conf.search[0] = f[1]
- } else {
- conf.search = make([]string, 0)
- }
-
- case "search": // set search path to given servers
- conf.search = make([]string, len(f)-1)
- for i := 0; i < len(conf.search); i++ {
- conf.search[i] = f[i+1]
- }
-
- case "options": // magic options
- for i := 1; i < len(f); i++ {
- s := f[i]
- switch {
- case hasPrefix(s, "ndots:"):
- n, _, _ := dtoi(s, 6)
- if n < 1 {
- n = 1
- }
- conf.ndots = n
- case hasPrefix(s, "timeout:"):
- n, _, _ := dtoi(s, 8)
- if n < 1 {
- n = 1
- }
- conf.timeout = n
- case hasPrefix(s, "attempts:"):
- n, _, _ := dtoi(s, 9)
- if n < 1 {
- n = 1
- }
- conf.attempts = n
- case s == "rotate":
- conf.rotate = true
- }
- }
- }
- }
- file.close()
-
- return conf, nil
-}
-
-func hasPrefix(s, prefix string) bool {
- return len(s) >= len(prefix) && s[:len(prefix)] == prefix
-}