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Pull request: all: fix statip ip ck
Merge in DNS/adguard-home from fix-static-ip-check to master
Squashed commit of the following:
commit af365c106f3d620afc77492a06f5368611328f5f
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Mon Feb 15 18:55:35 2021 +0300
all: doc changes
commit 922afb262458fc488e03cad232430d90c504f2f3
Merge: 43fec5fb dbcc55f5
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Mon Feb 15 18:53:31 2021 +0300
Merge branch 'master' into fix-static-ip-check
commit 43fec5fb79f5c67b375da00aa73d11b3ed9ba3a4
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Mon Feb 15 18:37:16 2021 +0300
all: fix statip ip ck
This commit is contained in:
parent
dbcc55f528
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@ -31,6 +31,8 @@ and this project adheres to
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### Fixed
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- Error when enabling the DHCP server when AdGuard Home couldn't determine if
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the machine has a static IP.
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- Optical issue on custom rules ([#2641]).
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- Occasional crashes during startup.
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- The field `"range_start"` in the `GET /control/dhcp/status` HTTP API response
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@ -95,26 +95,40 @@ func (s *Server) enableDHCP(ifaceName string) (code int, err error) {
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var hasStaticIP bool
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hasStaticIP, err = sysutil.IfaceHasStaticIP(ifaceName)
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if err != nil {
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// ErrPermission may happen here on Linux systems where AdGuard
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// Home is installed using Snap. That doesn't necessarily mean
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// that the machine doesn't have a static IP, so we can assume
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// that it has and go on. If the machine doesn't, we'll get an
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// error later.
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//
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// See https://github.com/AdguardTeam/AdGuardHome/issues/2667.
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if errors.Is(err, os.ErrPermission) {
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// ErrPermission may happen here on Linux systems where
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// AdGuard Home is installed using Snap. That doesn't
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// necessarily mean that the machine doesn't have
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// a static IP, so we can assume that it has and go on.
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// If the machine doesn't, we'll get an error later.
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//
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// See https://github.com/AdguardTeam/AdGuardHome/issues/2667.
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//
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// TODO(a.garipov): I was thinking about moving this
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// into IfaceHasStaticIP, but then we wouldn't be able
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// to log it. Think about it more.
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log.Info("error while checking static ip: %s; "+
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"assuming machine has static ip and going on", err)
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hasStaticIP = true
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} else if errors.Is(err, sysutil.ErrNoStaticIPInfo) {
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// Couldn't obtain a definitive answer. Assume static
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// IP an go on.
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log.Info("can't check for static ip; " +
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"assuming machine has static ip and going on")
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hasStaticIP = true
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} else {
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return http.StatusInternalServerError, fmt.Errorf("checking static ip: %w", err)
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err = fmt.Errorf("checking static ip: %w", err)
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return http.StatusInternalServerError, err
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}
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}
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if !hasStaticIP {
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err = sysutil.IfaceSetStaticIP(ifaceName)
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if err != nil {
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return http.StatusInternalServerError, fmt.Errorf("setting static ip: %w", err)
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err = fmt.Errorf("setting static ip: %w", err)
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return http.StatusInternalServerError, err
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}
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}
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@ -5,10 +5,17 @@ import (
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"os/exec"
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"strings"
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"github.com/AdguardTeam/AdGuardHome/internal/agherr"
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"github.com/AdguardTeam/golibs/log"
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)
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// ErrNoStaticIPInfo is returned by IfaceHasStaticIP when no information about
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// the IP being static is available.
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const ErrNoStaticIPInfo agherr.Error = "no information about static ip"
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// IfaceHasStaticIP checks if interface is configured to have static IP address.
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// If it can't give a definitive answer, it returns false and an error for which
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// errors.Is(err, ErrNoStaticIPInfo) is true.
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func IfaceHasStaticIP(ifaceName string) (has bool, err error) {
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return ifaceHasStaticIP(ifaceName)
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}
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@ -21,7 +21,11 @@ import (
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const maxConfigFileSize = 1024 * 1024
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func ifaceHasStaticIP(ifaceName string) (has bool, err error) {
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var f *os.File
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// TODO(a.garipov): Currently, this function returns the first
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// definitive result. So if /etc/dhcpcd.conf has a static IP while
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// /etc/network/interfaces doesn't, it will return true. Perhaps this
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// is not the most desirable behavior.
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for _, check := range []struct {
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checker func(io.Reader, string) (bool, error)
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filePath string
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@ -32,8 +36,11 @@ func ifaceHasStaticIP(ifaceName string) (has bool, err error) {
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checker: ifacesStaticConfig,
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filePath: "/etc/network/interfaces",
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}} {
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var f *os.File
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f, err = os.Open(check.filePath)
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if err != nil {
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// ErrNotExist can happen here if there is no such file.
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// This is normal, as not every system uses those files.
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if errors.Is(err, os.ErrNotExist) {
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err = nil
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@ -52,12 +59,14 @@ func ifaceHasStaticIP(ifaceName string) (has bool, err error) {
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defer fileReadCloser.Close()
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has, err = check.checker(fileReadCloser, ifaceName)
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if has || err != nil {
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break
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if err != nil {
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return false, err
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}
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return has, nil
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}
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return has, err
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return false, ErrNoStaticIPInfo
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}
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// dhcpcdStaticConfig checks if interface is configured by /etc/dhcpcd.conf to
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