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gometalinter

This commit is contained in:
Andrey Meshkov 2019-01-24 20:11:01 +03:00 committed by Eugene Bujak
parent c9d627ea71
commit d078851246
21 changed files with 454 additions and 409 deletions
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4
.gitignore vendored
View File

@ -12,5 +12,5 @@
/scripts/translations/oneskyapp.json
# Test output
dnsfilter/dnsfilter.TestLotsOfRules*.pprof
tests/top-1m.csv
dnsfilter/tests/top-1m.csv
dnsfilter/tests/dnsfilter.TestLotsOfRules*.pprof

40
.gometalinter.json Normal file
View File

@ -0,0 +1,40 @@
{
"Vendor": true,
"Test": true,
"Deadline": "2m",
"Sort": ["linter", "severity", "path", "line"],
"Exclude": [
".*generated.*",
"dnsfilter/rule_to_regexp.go"
],
"EnableGC": true,
"Linters": {
"nakedret": {
"Command": "nakedret",
"Pattern": "^(?P<path>.*?\\.go):(?P<line>\\d+)\\s*(?P<message>.*)$"
}
},
"WarnUnmatchedDirective": true,
"DisableAll": true,
"Enable": [
"deadcode",
"gocyclo",
"gofmt",
"goimports",
"golint",
"gosimple",
"ineffassign",
"interfacer",
"lll",
"misspell",
"nakedret",
"unconvert",
"unparam",
"unused",
"vet"
],
"Cyclo": 20,
"LineLength": 200
}

163
app.go
View File

@ -43,7 +43,89 @@ func main() {
// config can be specified, which reads options from there, but other command line flags have to override config values
// therefore, we must do it manually instead of using a lib
{
loadOptions()
// Load filters from the disk
// And if any filter has zero ID, assign a new one
for i := range config.Filters {
filter := &config.Filters[i] // otherwise we're operating on a copy
if filter.ID == 0 {
filter.ID = assignUniqueFilterID()
}
err := filter.load()
if err != nil {
// This is okay for the first start, the filter will be loaded later
log.Printf("Couldn't load filter %d contents due to %s", filter.ID, err)
// clear LastUpdated so it gets fetched right away
}
if len(filter.Rules) == 0 {
filter.LastUpdated = time.Time{}
}
}
// Update filters we've just loaded right away, don't wait for periodic update timer
go func() {
refreshFiltersIfNecessary(false)
// Save the updated config
err := config.write()
if err != nil {
log.Fatal(err)
}
}()
signalChannel := make(chan os.Signal)
signal.Notify(signalChannel, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT)
go func() {
<-signalChannel
cleanup()
os.Exit(0)
}()
// Save the updated config
err := config.write()
if err != nil {
log.Fatal(err)
}
address := net.JoinHostPort(config.BindHost, strconv.Itoa(config.BindPort))
go periodicallyRefreshFilters()
http.Handle("/", optionalAuthHandler(http.FileServer(box)))
registerControlHandlers()
err = startDNSServer()
if err != nil {
log.Fatal(err)
}
err = startDHCPServer()
if err != nil {
log.Fatal(err)
}
URL := fmt.Sprintf("http://%s", address)
log.Println("Go to " + URL)
log.Fatal(http.ListenAndServe(address, nil))
}
func cleanup() {
err := stopDNSServer()
if err != nil {
log.Printf("Couldn't stop DNS server: %s", err)
}
}
func getInput() (string, error) {
scanner := bufio.NewScanner(os.Stdin)
scanner.Scan()
text := scanner.Text()
err := scanner.Err()
return text, err
}
// loadOptions reads command line arguments and initializes configuration
func loadOptions() {
var printHelp func()
var configFilename *string
var bindHost *string
@ -130,85 +212,6 @@ func main() {
}
}
// Load filters from the disk
// And if any filter has zero ID, assign a new one
for i := range config.Filters {
filter := &config.Filters[i] // otherwise we're operating on a copy
if filter.ID == 0 {
filter.ID = assignUniqueFilterID()
}
err := filter.load()
if err != nil {
// This is okay for the first start, the filter will be loaded later
log.Printf("Couldn't load filter %d contents due to %s", filter.ID, err)
// clear LastUpdated so it gets fetched right away
}
if len(filter.Rules) == 0 {
filter.LastUpdated = time.Time{}
}
}
// Update filters we've just loaded right away, don't wait for periodic update timer
go func() {
refreshFiltersIfNeccessary(false)
// Save the updated config
err := config.write()
if err != nil {
log.Fatal(err)
}
}()
signalChannel := make(chan os.Signal)
signal.Notify(signalChannel, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT)
go func() {
<-signalChannel
cleanup()
os.Exit(0)
}()
// Save the updated config
err := config.write()
if err != nil {
log.Fatal(err)
}
address := net.JoinHostPort(config.BindHost, strconv.Itoa(config.BindPort))
go periodicallyRefreshFilters()
http.Handle("/", optionalAuthHandler(http.FileServer(box)))
registerControlHandlers()
err = startDNSServer()
if err != nil {
log.Fatal(err)
}
err = startDHCPServer()
if err != nil {
log.Fatal(err)
}
URL := fmt.Sprintf("http://%s", address)
log.Println("Go to " + URL)
log.Fatal(http.ListenAndServe(address, nil))
}
func cleanup() {
err := stopDNSServer()
if err != nil {
log.Printf("Couldn't stop DNS server: %s", err)
}
}
func getInput() (string, error) {
scanner := bufio.NewScanner(os.Stdin)
scanner.Scan()
text := scanner.Text()
err := scanner.Err()
return text, err
}
func promptAndGet(prompt string) (string, error) {
for {
fmt.Print(prompt)

2
config.go
View File

@ -21,7 +21,7 @@ const (
// configuration is loaded from YAML
// field ordering is important -- yaml fields will mirror ordering from here
type configuration struct {
ourConfigFilename string // Config filename (can be overriden via the command line arguments)
ourConfigFilename string // Config filename (can be overridden via the command line arguments)
ourBinaryDir string // Location of our directory, used to protect against CWD being somewhere else
BindHost string `yaml:"bind_host"`

119
control.go
View File

@ -40,27 +40,26 @@ func writeAllConfigsAndReloadDNS() error {
log.Printf("Couldn't write all configs: %s", err)
return err
}
reconfigureDNSServer()
return nil
return reconfigureDNSServer()
}
func httpUpdateConfigReloadDNSReturnOK(w http.ResponseWriter, r *http.Request) {
err := writeAllConfigsAndReloadDNS()
if err != nil {
errortext := fmt.Sprintf("Couldn't write config file: %s", err)
log.Println(errortext)
http.Error(w, errortext, http.StatusInternalServerError)
errorText := fmt.Sprintf("Couldn't write config file: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
return
}
returnOK(w, r)
returnOK(w)
}
func returnOK(w http.ResponseWriter, r *http.Request) {
func returnOK(w http.ResponseWriter) {
_, err := fmt.Fprintf(w, "OK\n")
if err != nil {
errortext := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errortext)
http.Error(w, errortext, http.StatusInternalServerError)
errorText := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
}
}
@ -79,17 +78,17 @@ func handleStatus(w http.ResponseWriter, r *http.Request) {
jsonVal, err := json.Marshal(data)
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}
@ -147,7 +146,13 @@ func handleSetUpstreamDNS(w http.ResponseWriter, r *http.Request) {
http.Error(w, errorText, http.StatusInternalServerError)
return
}
reconfigureDNSServer()
err = reconfigureDNSServer()
if err != nil {
errorText := fmt.Sprintf("Couldn't reconfigure the DNS server: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
return
}
_, err = fmt.Fprintf(w, "OK %d servers\n", len(hosts))
if err != nil {
errorText := fmt.Sprintf("Couldn't write body: %s", err)
@ -206,7 +211,7 @@ func checkDNS(input string) error {
log.Printf("Checking if DNS %s works...", input)
u, err := upstream.AddressToUpstream(input, "", dnsforward.DefaultTimeout)
if err != nil {
return fmt.Errorf("Failed to choose upstream for %s: %s", input, err)
return fmt.Errorf("failed to choose upstream for %s: %s", input, err)
}
req := dns.Msg{}
@ -243,9 +248,9 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
resp, err := client.Get(versionCheckURL)
if err != nil {
errortext := fmt.Sprintf("Couldn't get version check json from %s: %T %s\n", versionCheckURL, err, err)
log.Println(errortext)
http.Error(w, errortext, http.StatusBadGateway)
errorText := fmt.Sprintf("Couldn't get version check json from %s: %T %s\n", versionCheckURL, err, err)
log.Println(errorText)
http.Error(w, errorText, http.StatusBadGateway)
return
}
if resp != nil && resp.Body != nil {
@ -255,18 +260,18 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
// read the body entirely
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
errortext := fmt.Sprintf("Couldn't read response body from %s: %s", versionCheckURL, err)
log.Println(errortext)
http.Error(w, errortext, http.StatusBadGateway)
errorText := fmt.Sprintf("Couldn't read response body from %s: %s", versionCheckURL, err)
log.Println(errorText)
http.Error(w, errorText, http.StatusBadGateway)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(body)
if err != nil {
errortext := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errortext)
http.Error(w, errortext, http.StatusInternalServerError)
errorText := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
}
versionCheckLastTime = now
@ -299,18 +304,18 @@ func handleFilteringStatus(w http.ResponseWriter, r *http.Request) {
config.RUnlock()
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}
@ -378,7 +383,7 @@ func handleFilteringAddURL(w http.ResponseWriter, r *http.Request) {
}
// URL is deemed valid, append it to filters, update config, write new filter file and tell dns to reload it
// TODO: since we directly feed filters in-memory, revisit if writing configs is always neccessary
// TODO: since we directly feed filters in-memory, revisit if writing configs is always necessary
config.Filters = append(config.Filters, filter)
err = writeAllConfigs()
if err != nil {
@ -473,7 +478,7 @@ func handleFilteringEnableURL(w http.ResponseWriter, r *http.Request) {
}
// kick off refresh of rules from new URLs
refreshFiltersIfNeccessary(false)
refreshFiltersIfNecessary(false)
httpUpdateConfigReloadDNSReturnOK(w, r)
}
@ -529,7 +534,7 @@ func handleFilteringSetRules(w http.ResponseWriter, r *http.Request) {
func handleFilteringRefresh(w http.ResponseWriter, r *http.Request) {
force := r.URL.Query().Get("force")
updated := refreshFiltersIfNeccessary(force != "")
updated := refreshFiltersIfNecessary(force != "")
fmt.Fprintf(w, "OK %d filters updated\n", updated)
}
@ -553,17 +558,17 @@ func handleSafeBrowsingStatus(w http.ResponseWriter, r *http.Request) {
}
jsonVal, err := json.Marshal(data)
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}
@ -574,9 +579,9 @@ func handleSafeBrowsingStatus(w http.ResponseWriter, r *http.Request) {
func handleParentalEnable(w http.ResponseWriter, r *http.Request) {
parameters, err := parseParametersFromBody(r.Body)
if err != nil {
errortext := fmt.Sprintf("failed to parse parameters from body: %s", err)
log.Println(errortext)
http.Error(w, errortext, 400)
errorText := fmt.Sprintf("failed to parse parameters from body: %s", err)
log.Println(errorText)
http.Error(w, errorText, 400)
return
}
@ -631,18 +636,18 @@ func handleParentalStatus(w http.ResponseWriter, r *http.Request) {
}
jsonVal, err := json.Marshal(data)
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}
@ -667,18 +672,18 @@ func handleSafeSearchStatus(w http.ResponseWriter, r *http.Request) {
}
jsonVal, err := json.Marshal(data)
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}

10
dhcp.go
View File

@ -58,7 +58,10 @@ func handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
}
}
if !newconfig.Enabled {
dhcpServer.Stop()
err := dhcpServer.Stop()
if err != nil {
log.Printf("failed to stop the DHCP server: %s", err)
}
}
config.DHCP = newconfig
httpUpdateConfigReloadDNSReturnOK(w, r)
@ -73,11 +76,6 @@ func handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
return
}
type address struct {
IP string
Netmask string
}
type responseInterface struct {
Name string `json:"name"`
MTU int `json:"mtu"`

20
dhcpd/check_other_dhcp.go
View File

@ -13,6 +13,8 @@ import (
"github.com/krolaw/dhcp4"
)
// CheckIfOtherDHCPServersPresent sends a DHCP request to the specified network interface,
// and waits for a response for a period defined by defaultDiscoverTime
func CheckIfOtherDHCPServersPresent(ifaceName string) (bool, error) {
iface, err := net.InterfaceByName(ifaceName)
if err != nil {
@ -30,8 +32,8 @@ func CheckIfOtherDHCPServersPresent(ifaceName string) (bool, error) {
dst := "255.255.255.255:67"
// form a DHCP request packet, try to emulate existing client as much as possible
xId := make([]byte, 8)
n, err := rand.Read(xId)
xID := make([]byte, 8)
n, err := rand.Read(xID)
if n != 8 && err == nil {
err = fmt.Errorf("Generated less than 8 bytes")
}
@ -60,13 +62,13 @@ func CheckIfOtherDHCPServersPresent(ifaceName string) (bool, error) {
leaseTime := uint32(math.RoundToEven(time.Duration(time.Hour * 24 * 90).Seconds()))
binary.BigEndian.PutUint32(leaseTimeRaw, leaseTime)
options := []dhcp4.Option{
{dhcp4.OptionParameterRequestList, requestList},
{dhcp4.OptionMaximumDHCPMessageSize, maxUDPsizeRaw},
{dhcp4.OptionClientIdentifier, append([]byte{0x01}, iface.HardwareAddr...)},
{dhcp4.OptionIPAddressLeaseTime, leaseTimeRaw},
{dhcp4.OptionHostName, []byte(hostname)},
{Code: dhcp4.OptionParameterRequestList, Value: requestList},
{Code: dhcp4.OptionMaximumDHCPMessageSize, Value: maxUDPsizeRaw},
{Code: dhcp4.OptionClientIdentifier, Value: append([]byte{0x01}, iface.HardwareAddr...)},
{Code: dhcp4.OptionIPAddressLeaseTime, Value: leaseTimeRaw},
{Code: dhcp4.OptionHostName, Value: []byte(hostname)},
}
packet := dhcp4.RequestPacket(dhcp4.Discover, iface.HardwareAddr, nil, xId, false, options)
packet := dhcp4.RequestPacket(dhcp4.Discover, iface.HardwareAddr, nil, xID, false, options)
// resolve 0.0.0.0:68
udpAddr, err := net.ResolveUDPAddr("udp4", src)
@ -98,7 +100,7 @@ func CheckIfOtherDHCPServersPresent(ifaceName string) (bool, error) {
}
// send to 255.255.255.255:67
n, err = c.WriteTo(packet, dstAddr)
_, err = c.WriteTo(packet, dstAddr)
// spew.Dump(n, err)
if err != nil {
return false, wrapErrPrint(err, "Couldn't send a packet to %s", dst)

75
dhcpd/dhcpd.go
View File

@ -13,6 +13,7 @@ import (
const defaultDiscoverTime = time.Second * 3
// Lease contains the necessary information about a DHCP lease
// field ordering is important -- yaml fields will mirror ordering from here
type Lease struct {
HWAddr net.HardwareAddr `json:"mac" yaml:"hwaddr"`
@ -21,6 +22,7 @@ type Lease struct {
Expiry time.Time `json:"expires"`
}
// ServerConfig - DHCP server configuration
// field ordering is important -- yaml fields will mirror ordering from here
type ServerConfig struct {
Enabled bool `json:"enabled" yaml:"enabled"`
@ -32,6 +34,7 @@ type ServerConfig struct {
LeaseDuration uint `json:"lease_duration" yaml:"lease_duration"` // in seconds
}
// Server - the current state of the DHCP server
type Server struct {
conn *filterConn // listening UDP socket
@ -137,6 +140,7 @@ func (s *Server) Start(config *ServerConfig) error {
return nil
}
// Stop closes the listening UDP socket
func (s *Server) Stop() error {
if s.conn == nil {
// nothing to do, return silently
@ -249,6 +253,7 @@ func (s *Server) unreserveIP(ip net.IP) {
delete(s.IPpool, IP4)
}
// ServeDHCP handles an incoming DHCP request
func (s *Server) ServeDHCP(p dhcp4.Packet, msgType dhcp4.MessageType, options dhcp4.Options) dhcp4.Packet {
log.Tracef("Got %v message", msgType)
log.Tracef("Leases:")
@ -259,27 +264,6 @@ func (s *Server) ServeDHCP(p dhcp4.Packet, msgType dhcp4.MessageType, options dh
for ip, hwaddr := range s.IPpool {
log.Tracef("IP pool entry %s -> %s", net.IPv4(ip[0], ip[1], ip[2], ip[3]), hwaddr)
}
// spew.Dump(s.leases, s.IPpool)
// log.Printf("Called with msgType = %v, options = %+v", msgType, options)
// spew.Dump(p)
// log.Printf("%14s %v", "p.Broadcast", p.Broadcast()) // false
// log.Printf("%14s %v", "p.CHAddr", p.CHAddr()) // 2c:f0:a2:f2:31:00
// log.Printf("%14s %v", "p.CIAddr", p.CIAddr()) // 0.0.0.0
// log.Printf("%14s %v", "p.Cookie", p.Cookie()) // [99 130 83 99]
// log.Printf("%14s %v", "p.File", p.File()) // []
// log.Printf("%14s %v", "p.Flags", p.Flags()) // [0 0]
// log.Printf("%14s %v", "p.GIAddr", p.GIAddr()) // 0.0.0.0
// log.Printf("%14s %v", "p.HLen", p.HLen()) // 6
// log.Printf("%14s %v", "p.HType", p.HType()) // 1
// log.Printf("%14s %v", "p.Hops", p.Hops()) // 0
// log.Printf("%14s %v", "p.OpCode", p.OpCode()) // BootRequest
// log.Printf("%14s %v", "p.Options", p.Options()) // [53 1 1 55 10 1 121 3 6 15 119 252 95 44 46 57 2 5 220 61 7 1 44 240 162 242 49 0 51 4 0 118 167 0 12 4 119 104 109 100 255 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
// log.Printf("%14s %v", "p.ParseOptions", p.ParseOptions()) // map[OptionParameterRequestList:[1 121 3 6 15 119 252 95 44 46] OptionDHCPMessageType:[1] OptionMaximumDHCPMessageSize:[5 220] OptionClientIdentifier:[1 44 240 162 242 49 0] OptionIPAddressLeaseTime:[0 118 167 0] OptionHostName:[119 104 109 100]]
// log.Printf("%14s %v", "p.SIAddr", p.SIAddr()) // 0.0.0.0
// log.Printf("%14s %v", "p.SName", p.SName()) // []
// log.Printf("%14s %v", "p.Secs", p.Secs()) // [0 8]
// log.Printf("%14s %v", "p.XId", p.XId()) // [211 184 20 44]
// log.Printf("%14s %v", "p.YIAddr", p.YIAddr()) // 0.0.0.0
switch msgType {
case dhcp4.Discover: // Broadcast Packet From Client - Can I have an IP?
@ -297,6 +281,32 @@ func (s *Server) ServeDHCP(p dhcp4.Packet, msgType dhcp4.MessageType, options dh
case dhcp4.Request: // Broadcast From Client - I'll take that IP (Also start for renewals)
// start/renew a lease -- update lease time
// some clients (OSX) just go right ahead and do Request first from previously known IP, if they get NAK, they restart full cycle with Discover then Request
return s.handleDHCP4Request(p, msgType, options)
case dhcp4.Decline: // Broadcast From Client - Sorry I can't use that IP
log.Tracef("Got from client: Decline")
case dhcp4.Release: // From Client, I don't need that IP anymore
log.Tracef("Got from client: Release")
case dhcp4.Inform: // From Client, I have this IP and there's nothing you can do about it
log.Tracef("Got from client: Inform")
// do nothing
// from server -- ignore those but enumerate just in case
case dhcp4.Offer: // Broadcast From Server - Here's an IP
log.Printf("SHOULD NOT HAPPEN -- FROM ANOTHER DHCP SERVER: Offer")
case dhcp4.ACK: // From Server, Yes you can have that IP
log.Printf("SHOULD NOT HAPPEN -- FROM ANOTHER DHCP SERVER: ACK")
case dhcp4.NAK: // From Server, No you cannot have that IP
log.Printf("SHOULD NOT HAPPEN -- FROM ANOTHER DHCP SERVER: NAK")
default:
log.Printf("Unknown DHCP packet detected, ignoring: %v", msgType)
return nil
}
return nil
}
func (s *Server) handleDHCP4Request(p dhcp4.Packet, msgType dhcp4.MessageType, options dhcp4.Options) dhcp4.Packet {
log.Tracef("Got from client: Request")
if server, ok := options[dhcp4.OptionServerIdentifier]; ok && !net.IP(server).Equal(s.ipnet.IP) {
log.Tracef("Request message not for this DHCP server (%v vs %v)", server, s.ipnet.IP)
@ -366,30 +376,9 @@ func (s *Server) ServeDHCP(p dhcp4.Packet, msgType dhcp4.MessageType, options dh
// requested IP is outside of DHCP range
log.Tracef("Replying with NAK: request IP %s is outside of DHCP range [%s, %s], asked by %v", reqIP, s.leaseStart, s.leaseStop, p.CHAddr())
return dhcp4.ReplyPacket(p, dhcp4.NAK, s.ipnet.IP, nil, 0, nil)
case dhcp4.Decline: // Broadcast From Client - Sorry I can't use that IP
log.Tracef("Got from client: Decline")
case dhcp4.Release: // From Client, I don't need that IP anymore
log.Tracef("Got from client: Release")
case dhcp4.Inform: // From Client, I have this IP and there's nothing you can do about it
log.Tracef("Got from client: Inform")
// do nothing
// from server -- ignore those but enumerate just in case
case dhcp4.Offer: // Broadcast From Server - Here's an IP
log.Printf("SHOULD NOT HAPPEN -- FROM ANOTHER DHCP SERVER: Offer")
case dhcp4.ACK: // From Server, Yes you can have that IP
log.Printf("SHOULD NOT HAPPEN -- FROM ANOTHER DHCP SERVER: ACK")
case dhcp4.NAK: // From Server, No you cannot have that IP
log.Printf("SHOULD NOT HAPPEN -- FROM ANOTHER DHCP SERVER: NAK")
default:
log.Printf("Unknown DHCP packet detected, ignoring: %v", msgType)
return nil
}
return nil
}
// Leases returns the list of current DHCP leases
func (s *Server) Leases() []*Lease {
s.RLock()
result := s.leases

3
dhcpd/filter_conn.go
View File

@ -8,7 +8,7 @@ import (
)
// filterConn listens to 0.0.0.0:67, but accepts packets only from specific interface
// This is neccessary for DHCP daemon to work, since binding to IP address doesn't
// This is necessary for DHCP daemon to work, since binding to IP address doesn't
// us access to see Discover/Request packets from clients.
//
// TODO: on windows, controlmessage does not work, try to find out another way
@ -49,7 +49,6 @@ func (f *filterConn) ReadFrom(b []byte) (int, net.Addr, error) {
}
// packet doesn't match criteria, drop it
}
return 0, nil, nil
}
func (f *filterConn) WriteTo(b []byte, addr net.Addr) (int, error) {

17
dhcpd/helpers.go
View File

@ -3,7 +3,6 @@ package dhcpd
import (
"fmt"
"net"
"strings"
"github.com/hmage/golibs/log"
"github.com/joomcode/errorx"
@ -45,22 +44,6 @@ func getIfaceIPv4(iface *net.Interface) *net.IPNet {
return nil
}
func isConnClosed(err error) bool {
if err == nil {
return false
}
nerr, ok := err.(*net.OpError)
if !ok {
return false
}
if strings.Contains(nerr.Err.Error(), "use of closed network connection") {
return true
}
return false
}
func wrapErrPrint(err error, message string, args ...interface{}) error {
var errx error
if err == nil {

4
dns.go
View File

@ -39,13 +39,13 @@ func generateServerConfig() dnsforward.ServerConfig {
}
for _, u := range config.DNS.UpstreamDNS {
upstream, err := upstream.AddressToUpstream(u, config.DNS.BootstrapDNS, dnsforward.DefaultTimeout)
dnsUpstream, err := upstream.AddressToUpstream(u, config.DNS.BootstrapDNS, dnsforward.DefaultTimeout)
if err != nil {
log.Printf("Couldn't get upstream: %s", err)
// continue, just ignore the upstream
continue
}
newconfig.Upstreams = append(newconfig.Upstreams, upstream)
newconfig.Upstreams = append(newconfig.Upstreams, dnsUpstream)
}
return newconfig
}

48
dnsfilter/dnsfilter.go
View File

@ -35,7 +35,7 @@ const defaultParentalURL = "http://%s/check-parental-control-hash?prefixes=%s&se
// ErrInvalidSyntax is returned by AddRule when the rule is invalid
var ErrInvalidSyntax = errors.New("dnsfilter: invalid rule syntax")
// ErrInvalidSyntax is returned by AddRule when the rule was already added to the filter
// ErrAlreadyExists is returned by AddRule when the rule was already added to the filter
var ErrAlreadyExists = errors.New("dnsfilter: rule was already added")
const shortcutLength = 6 // used for rule search optimization, 6 hits the sweet spot
@ -115,6 +115,7 @@ type Dnsfilter struct {
privateConfig
}
// Filter represents a filter list
type Filter struct {
ID int64 `json:"id"` // auto-assigned when filter is added (see nextFilterID), json by default keeps ID uppercase but we need lowercase
Rules []string `json:"-" yaml:"-"` // not in yaml or json
@ -127,16 +128,26 @@ type Reason int
const (
// reasons for not filtering
NotFilteredNotFound Reason = iota // host was not find in any checks, default value for result
NotFilteredWhiteList // the host is explicitly whitelisted
NotFilteredError // there was a transitive error during check
// NotFilteredNotFound - host was not find in any checks, default value for result
NotFilteredNotFound Reason = iota
// NotFilteredWhiteList - the host is explicitly whitelisted
NotFilteredWhiteList
// NotFilteredError - there was a transitive error during check
NotFilteredError
// reasons for filtering
FilteredBlackList // the host was matched to be advertising host
FilteredSafeBrowsing // the host was matched to be malicious/phishing
FilteredParental // the host was matched to be outside of parental control settings
FilteredInvalid // the request was invalid and was not processed
FilteredSafeSearch // the host was replaced with safesearch variant
// FilteredBlackList - the host was matched to be advertising host
FilteredBlackList
// FilteredSafeBrowsing - the host was matched to be malicious/phishing
FilteredSafeBrowsing
// FilteredParental - the host was matched to be outside of parental control settings
FilteredParental
// FilteredInvalid - the request was invalid and was not processed
FilteredInvalid
// FilteredSafeSearch - the host was replaced with safesearch variant
FilteredSafeSearch
)
// these variables need to survive coredns reload
@ -151,7 +162,7 @@ type Result struct {
IsFiltered bool `json:",omitempty"` // True if the host name is filtered
Reason Reason `json:",omitempty"` // Reason for blocking / unblocking
Rule string `json:",omitempty"` // Original rule text
Ip net.IP `json:",omitempty"` // Not nil only in the case of a hosts file syntax
IP net.IP `json:",omitempty"` // Not nil only in the case of a hosts file syntax
FilterID int64 `json:",omitempty"` // Filter ID the rule belongs to
}
@ -228,7 +239,6 @@ func newRulesTable() *rulesTable {
func (r *rulesTable) Add(rule *rule) {
r.Lock()
if rule.ip != nil {
// Hosts syntax
r.rulesByHost[rule.text] = rule
@ -476,7 +486,7 @@ func (rule *rule) match(host string) (Result, error) {
IsFiltered: true,
Reason: FilteredBlackList,
Rule: rule.originalText,
Ip: rule.ip,
IP: rule.ip,
FilterID: rule.listID,
}, nil
}
@ -661,8 +671,11 @@ func (d *Dnsfilter) checkParental(host string) (Result, error) {
return result, err
}
type formatHandler func(hashparam string) string
type handleBodyHandler func(body []byte, hashes map[string]bool) (Result, error)
// real implementation of lookup/check
func (d *Dnsfilter) lookupCommon(host string, lookupstats *LookupStats, cache gcache.Cache, hashparamNeedSlash bool, format func(hashparam string) string, handleBody func(body []byte, hashes map[string]bool) (Result, error)) (Result, error) {
func (d *Dnsfilter) lookupCommon(host string, lookupstats *LookupStats, cache gcache.Cache, hashparamNeedSlash bool, format formatHandler, handleBody handleBodyHandler) (Result, error) {
// if host ends with a dot, trim it
host = strings.ToLower(strings.Trim(host, "."))
@ -913,15 +926,6 @@ func (d *Dnsfilter) Destroy() {
// config manipulation helpers
//
// IsParentalSensitivityValid checks if sensitivity is valid value
func IsParentalSensitivityValid(sensitivity int) bool {
switch sensitivity {
case 3, 10, 13, 17:
return true
}
return false
}
// SetSafeBrowsingServer lets you optionally change hostname of safesearch lookup
func (d *Dnsfilter) SetSafeBrowsingServer(host string) {
if len(host) == 0 {

31
dnsfilter/dnsfilter_test.go
View File

@ -26,7 +26,7 @@ import (
func TestLotsOfRulesMemoryUsage(t *testing.T) {
start := getRSS()
log.Tracef("RSS before loading rules - %d kB\n", start/1024)
dumpMemProfile(_Func() + "1.pprof")
dumpMemProfile("tests/" + _Func() + "1.pprof")
d := NewForTest()
defer d.Destroy()
@ -37,7 +37,7 @@ func TestLotsOfRulesMemoryUsage(t *testing.T) {
afterLoad := getRSS()
log.Tracef("RSS after loading rules - %d kB (%d kB diff)\n", afterLoad/1024, (afterLoad-start)/1024)
dumpMemProfile(_Func() + "2.pprof")
dumpMemProfile("tests/" + _Func() + "2.pprof")
tests := []struct {
host string
@ -60,7 +60,7 @@ func TestLotsOfRulesMemoryUsage(t *testing.T) {
}
afterMatch := getRSS()
log.Tracef("RSS after matching - %d kB (%d kB diff)\n", afterMatch/1024, (afterMatch-afterLoad)/1024)
dumpMemProfile(_Func() + "3.pprof")
dumpMemProfile("tests/" + _Func() + "3.pprof")
}
func getRSS() uint64 {
@ -69,6 +69,9 @@ func getRSS() uint64 {
panic(err)
}
minfo, err := proc.MemoryInfo()
if err != nil {
panic(err)
}
return minfo.RSS
}
@ -86,7 +89,7 @@ func dumpMemProfile(name string) {
}
}
const topHostsFilename = "../tests/top-1m.csv"
const topHostsFilename = "tests/top-1m.csv"
func fetchTopHostsFromNet() {
log.Tracef("Fetching top hosts from network")
@ -146,7 +149,7 @@ func getTopHosts() {
func TestLotsOfRulesLotsOfHostsMemoryUsage(t *testing.T) {
start := getRSS()
log.Tracef("RSS before loading rules - %d kB\n", start/1024)
dumpMemProfile(_Func() + "1.pprof")
dumpMemProfile("tests/" + _Func() + "1.pprof")
d := NewForTest()
defer d.Destroy()
@ -155,7 +158,7 @@ func TestLotsOfRulesLotsOfHostsMemoryUsage(t *testing.T) {
afterLoad := getRSS()
log.Tracef("RSS after loading rules - %d kB (%d kB diff)\n", afterLoad/1024, (afterLoad-start)/1024)
dumpMemProfile(_Func() + "2.pprof")
dumpMemProfile("tests/" + _Func() + "2.pprof")
getTopHosts()
hostnames, err := os.Open(topHostsFilename)
@ -165,7 +168,7 @@ func TestLotsOfRulesLotsOfHostsMemoryUsage(t *testing.T) {
defer hostnames.Close()
afterHosts := getRSS()
log.Tracef("RSS after loading hosts - %d kB (%d kB diff)\n", afterHosts/1024, (afterHosts-afterLoad)/1024)
dumpMemProfile(_Func() + "2.pprof")
dumpMemProfile("tests/" + _Func() + "2.pprof")
{
scanner := bufio.NewScanner(hostnames)
@ -184,7 +187,7 @@ func TestLotsOfRulesLotsOfHostsMemoryUsage(t *testing.T) {
afterMatch := getRSS()
log.Tracef("RSS after matching - %d kB (%d kB diff)\n", afterMatch/1024, (afterMatch-afterLoad)/1024)
dumpMemProfile(_Func() + "3.pprof")
dumpMemProfile("tests/" + _Func() + "3.pprof")
}
func TestRuleToRegexp(t *testing.T) {
@ -282,7 +285,7 @@ func (d *Dnsfilter) checkMatch(t *testing.T, hostname string) {
}
}
func (d *Dnsfilter) checkMatchIp(t *testing.T, hostname string, ip string) {
func (d *Dnsfilter) checkMatchIP(t *testing.T, hostname string, ip string) {
t.Helper()
ret, err := d.CheckHost(hostname)
if err != nil {
@ -291,8 +294,8 @@ func (d *Dnsfilter) checkMatchIp(t *testing.T, hostname string, ip string) {
if !ret.IsFiltered {
t.Errorf("Expected hostname %s to match", hostname)
}
if ret.Ip == nil || ret.Ip.String() != ip {
t.Errorf("Expected ip %s to match, actual: %v", ip, ret.Ip)
if ret.IP == nil || ret.IP.String() != ip {
t.Errorf("Expected ip %s to match, actual: %v", ip, ret.IP)
}
}
@ -308,7 +311,7 @@ func (d *Dnsfilter) checkMatchEmpty(t *testing.T, hostname string) {
}
func loadTestRules(d *Dnsfilter) error {
filterFileName := "../tests/dns.txt"
filterFileName := "tests/dns.txt"
file, err := os.Open(filterFileName)
if err != nil {
return err
@ -368,8 +371,8 @@ func TestEtcHostsMatching(t *testing.T) {
text := fmt.Sprintf(" %s google.com www.google.com # enforce google's safesearch ", addr)
d.checkAddRule(t, text)
d.checkMatchIp(t, "google.com", addr)
d.checkMatchIp(t, "www.google.com", addr)
d.checkMatchIP(t, "google.com", addr)
d.checkMatchIP(t, "www.google.com", addr)
d.checkMatchEmpty(t, "subdomain.google.com")
d.checkMatchEmpty(t, "example.org")
}

0
tests/dns.txt → dnsfilter/tests/dns.txt
View File

4
dnsforward/dnsforward.go
View File

@ -310,8 +310,8 @@ func (s *Server) genDNSFilterMessage(d *proxy.DNSContext, result *dnsfilter.Resu
case dnsfilter.FilteredParental:
return s.genBlockedHost(m, parentalBlockHost, d.Upstream)
default:
if result.Ip != nil {
return s.genARecord(m, result.Ip)
if result.IP != nil {
return s.genARecord(m, result.IP)
}
return s.genNXDomain(m)

54
dnsforward/querylog.go
View File

@ -112,6 +112,7 @@ func logRequest(question *dns.Msg, answer *dns.Msg, result *dnsfilter.Result, el
}
}
// HandleQueryLog handles query log web request
func HandleQueryLog(w http.ResponseWriter, r *http.Request) {
queryLogLock.RLock()
values := make([]*logEntry, len(queryLogCache))
@ -123,6 +124,7 @@ func HandleQueryLog(w http.ResponseWriter, r *http.Request) {
values[left], values[right] = values[right], values[left]
}
// iterate
var data = []map[string]interface{}{}
for _, entry := range values {
var q *dns.Msg
@ -167,7 +169,36 @@ func HandleQueryLog(w http.ResponseWriter, r *http.Request) {
jsonEntry["filterId"] = entry.Result.FilterID
}
if a != nil && len(a.Answer) > 0 {
answers := answerToMap(a)
if answers != nil {
jsonEntry["answer"] = answers
}
data = append(data, jsonEntry)
}
jsonVal, err := json.Marshal(data)
if err != nil {
errorText := fmt.Sprintf("Couldn't marshal data into json: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
}
}
func answerToMap(a *dns.Msg) []map[string]interface{} {
if a == nil || len(a.Answer) == 0 {
return nil
}
var answers = []map[string]interface{}{}
for _, k := range a.Answer {
header := k.Header()
@ -207,27 +238,8 @@ func HandleQueryLog(w http.ResponseWriter, r *http.Request) {
}
answers = append(answers, answer)
}
jsonEntry["answer"] = answers
}
data = append(data, jsonEntry)
}
jsonVal, err := json.Marshal(data)
if err != nil {
errorText := fmt.Sprintf("Couldn't marshal data into json: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
}
return answers
}
// getIPString is a helper function that extracts IP address from net.Addr

2
dnsforward/querylog_file.go
View File

@ -156,7 +156,7 @@ func periodicQueryLogRotate() {
func genericLoader(onEntry func(entry *logEntry) error, needMore func() bool, timeWindow time.Duration) error {
now := time.Now()
// read from querylog files, try newest file first
files := []string{}
var files []string
if enableGzip {
files = []string{

49
dnsforward/querylog_top.go
View File

@ -26,10 +26,10 @@ type hourTop struct {
mutex sync.RWMutex
}
func (top *hourTop) init() {
top.domains = gcache.New(queryLogTopSize).LRU().Build()
top.blocked = gcache.New(queryLogTopSize).LRU().Build()
top.clients = gcache.New(queryLogTopSize).LRU().Build()
func (h *hourTop) init() {
h.domains = gcache.New(queryLogTopSize).LRU().Build()
h.blocked = gcache.New(queryLogTopSize).LRU().Build()
h.clients = gcache.New(queryLogTopSize).LRU().Build()
}
type dayTop struct {
@ -69,9 +69,9 @@ func periodicHourlyTopRotate() {
}
}
func (top *hourTop) incrementValue(key string, cache gcache.Cache) error {
top.Lock()
defer top.Unlock()
func (h *hourTop) incrementValue(key string, cache gcache.Cache) error {
h.Lock()
defer h.Unlock()
ivalue, err := cache.Get(key)
if err == gcache.KeyNotFoundError {
// we just set it and we're done
@ -103,20 +103,20 @@ func (top *hourTop) incrementValue(key string, cache gcache.Cache) error {
return nil
}
func (top *hourTop) incrementDomains(key string) error {
return top.incrementValue(key, top.domains)
func (h *hourTop) incrementDomains(key string) error {
return h.incrementValue(key, h.domains)
}
func (top *hourTop) incrementBlocked(key string) error {
return top.incrementValue(key, top.blocked)
func (h *hourTop) incrementBlocked(key string) error {
return h.incrementValue(key, h.blocked)
}
func (top *hourTop) incrementClients(key string) error {
return top.incrementValue(key, top.clients)
func (h *hourTop) incrementClients(key string) error {
return h.incrementValue(key, h.clients)
}
// if does not exist -- return 0
func (top *hourTop) lockedGetValue(key string, cache gcache.Cache) (int, error) {
func (h *hourTop) lockedGetValue(key string, cache gcache.Cache) (int, error) {
ivalue, err := cache.Get(key)
if err == gcache.KeyNotFoundError {
return 0, nil
@ -137,19 +137,19 @@ func (top *hourTop) lockedGetValue(key string, cache gcache.Cache) (int, error)
return value, nil
}
func (top *hourTop) lockedGetDomains(key string) (int, error) {
return top.lockedGetValue(key, top.domains)
func (h *hourTop) lockedGetDomains(key string) (int, error) {
return h.lockedGetValue(key, h.domains)
}
func (top *hourTop) lockedGetBlocked(key string) (int, error) {
return top.lockedGetValue(key, top.blocked)
func (h *hourTop) lockedGetBlocked(key string) (int, error) {
return h.lockedGetValue(key, h.blocked)
}
func (top *hourTop) lockedGetClients(key string) (int, error) {
return top.lockedGetValue(key, top.clients)
func (h *hourTop) lockedGetClients(key string) (int, error) {
return h.lockedGetValue(key, h.clients)
}
func (r *dayTop) addEntry(entry *logEntry, q *dns.Msg, now time.Time) error {
func (d *dayTop) addEntry(entry *logEntry, q *dns.Msg, now time.Time) error {
// figure out which hour bucket it belongs to
hour := int(now.Sub(entry.Time).Hours())
if hour >= 24 {
@ -252,6 +252,7 @@ func fillStatsFromQueryLog() error {
return nil
}
// HandleStatsTop returns the current top stats
func HandleStatsTop(w http.ResponseWriter, r *http.Request) {
domains := map[string]int{}
blocked := map[string]int{}
@ -320,9 +321,9 @@ func HandleStatsTop(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
_, err := w.Write(json.Bytes())
if err != nil {
errortext := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errortext)
http.Error(w, errortext, http.StatusInternalServerError)
errorText := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
}
}

48
dnsforward/stats.go
View File

@ -17,7 +17,6 @@ var (
filteredLists = newDNSCounter("filtered_lists_total")
filteredSafebrowsing = newDNSCounter("filtered_safebrowsing_total")
filteredParental = newDNSCounter("filtered_parental_total")
filteredInvalid = newDNSCounter("filtered_invalid_total")
whitelisted = newDNSCounter("whitelisted_total")
safesearch = newDNSCounter("safesearch_total")
errorsTotal = newDNSCounter("errors_total")
@ -93,7 +92,7 @@ func (p *periodicStats) Observe(name string, when time.Time, value float64) {
currentValues := p.Entries[countname]
value := currentValues[elapsed]
// log.Tracef("Will change p.Entries[%s][%d] from %v to %v", countname, elapsed, value, value+1)
value += 1
value++
currentValues[elapsed] = value
p.Entries[countname] = currentValues
}
@ -224,6 +223,7 @@ func incrementCounters(entry *logEntry) {
elapsedTime.ObserveWithTime(entry.Elapsed.Seconds(), entry.Time)
}
// HandleStats returns aggregated stats data for the 24 hours
func HandleStats(w http.ResponseWriter, r *http.Request) {
const numHours = 24
histrical := generateMapFromStats(&statistics.PerHour, 0, numHours)
@ -252,17 +252,17 @@ func HandleStats(w http.ResponseWriter, r *http.Request) {
json, err := json.Marshal(summed)
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(json)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}
@ -296,6 +296,7 @@ func generateMapFromStats(stats *periodicStats, start int, end int) map[string]i
return result
}
// HandleStatsHistory returns historical stats data for the 24 hours
func HandleStatsHistory(w http.ResponseWriter, r *http.Request) {
// handle time unit and prepare our time window size
now := time.Now()
@ -323,16 +324,16 @@ func HandleStatsHistory(w http.ResponseWriter, r *http.Request) {
// parse start and end time
startTime, err := time.Parse(time.RFC3339, r.URL.Query().Get("start_time"))
if err != nil {
errortext := fmt.Sprintf("Must specify valid start_time parameter: %s", err)
log.Println(errortext)
http.Error(w, errortext, 400)
errorText := fmt.Sprintf("Must specify valid start_time parameter: %s", err)
log.Println(errorText)
http.Error(w, errorText, 400)
return
}
endTime, err := time.Parse(time.RFC3339, r.URL.Query().Get("end_time"))
if err != nil {
errortext := fmt.Sprintf("Must specify valid end_time parameter: %s", err)
log.Println(errortext)
http.Error(w, errortext, 400)
errorText := fmt.Sprintf("Must specify valid end_time parameter: %s", err)
log.Println(errorText)
http.Error(w, errorText, 400)
return
}
@ -360,28 +361,29 @@ func HandleStatsHistory(w http.ResponseWriter, r *http.Request) {
data := generateMapFromStats(stats, start, end)
json, err := json.Marshal(data)
if err != nil {
errortext := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to marshal status json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(json)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, 500)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, 500)
return
}
}
// HandleStatsReset resets the stats caches
func HandleStatsReset(w http.ResponseWriter, r *http.Request) {
purgeStats()
_, err := fmt.Fprintf(w, "OK\n")
if err != nil {
errortext := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errortext)
http.Error(w, errortext, http.StatusInternalServerError)
errorText := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
}
}

14
filter.go
View File

@ -70,20 +70,20 @@ func updateUniqueFilterID(filters []filter) {
func assignUniqueFilterID() int64 {
value := nextFilterID
nextFilterID += 1
nextFilterID++
return value
}
// Sets up a timer that will be checking for filters updates periodically
func periodicallyRefreshFilters() {
for range time.Tick(time.Minute) {
refreshFiltersIfNeccessary(false)
refreshFiltersIfNecessary(false)
}
}
// Checks filters updates if necessary
// If force is true, it ignores the filter.LastUpdated field value
func refreshFiltersIfNeccessary(force bool) int {
func refreshFiltersIfNecessary(force bool) int {
config.Lock()
// fetch URLs
@ -113,8 +113,12 @@ func refreshFiltersIfNeccessary(force bool) int {
}
config.Unlock()
if updateCount > 0 {
reconfigureDNSServer()
if updateCount > 0 && isRunning() {
err := reconfigureDNSServer()
if err != nil {
msg := fmt.Sprintf("SHOULD NOT HAPPEN: cannot reconfigure DNS server with the new filters: %s", err)
panic(msg)
}
}
return updateCount
}

6
i18n.go
View File

@ -34,9 +34,9 @@ func handleI18nCurrentLanguage(w http.ResponseWriter, r *http.Request) {
log.Printf("config.Language is %s", config.Language)
_, err := fmt.Fprintf(w, "%s\n", config.Language)
if err != nil {
errortext := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errortext)
http.Error(w, errortext, http.StatusInternalServerError)
errorText := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(errorText)
http.Error(w, errorText, http.StatusInternalServerError)
return
}
}