release: v1.3.7.1

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

.github/workflows/auto-merge.yml

@@ -0,0 +1,16 @@
+name: auto-merge
+
+on:
+  pull_request_target:
+
+jobs:
+  auto-merge:
+    name: Dependabot Auto Merge
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]' || github.actor == 'dependabot-preview[bot]'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ahmadnassri/action-dependabot-auto-merge@v2
+        with:
+          target: minor
+          github-token: ${{ secrets.AUTOMERGE_TOKEN }}

.github/workflows/develop.yaml

@@ -1,7 +1,7 @@
 on:
   push:
     branches:
-      - '**'
+      - 'master'
   pull_request:
     branches:
       - 'master'
@@ -47,7 +47,7 @@ jobs:
       - name: Test whois binary in frontend image
         run: |
           docker build -t local/frontend frontend/
-          docker run --rm --net host --entrypoint whois local/frontend github.com || exit 1
+          docker run --rm --net host --entrypoint whois local/frontend -I github.com || exit 1
           docker run --rm --net host --entrypoint whois local/frontend -h whois.ripe.net github.com || exit 1
           docker run --rm --net host --entrypoint whois local/frontend -h whois.ripe.net:43 github.com || exit 1
 
@@ -57,6 +57,12 @@ jobs:
           docker run --rm --net host --entrypoint traceroute local/proxy 127.0.0.1 || exit 1
           docker run --rm --net host --entrypoint traceroute local/proxy ::1 || exit 1
 
+      - name: Test mtr binary in proxy image
+        run: |
+          docker build -t local/proxy:mtr -f proxy/Dockerfile.mtr proxy/
+          docker run --rm --net host --entrypoint mtr local/proxy:mtr -w -c1 -Z1 -G1 -b 127.0.0.1 || exit 1
+          docker run --rm --net host --entrypoint mtr local/proxy:mtr -w -c1 -Z1 -G1 -b ::1 || exit 1
+
   docker-develop:
     runs-on: ubuntu-latest
     needs:
@@ -106,3 +112,16 @@ jobs:
             xddxdd/bird-lgproxy-go:develop-${{ github.sha }}
             ghcr.io/xddxdd/bird-lg-go:proxy-develop
             ghcr.io/xddxdd/bird-lg-go:proxy-develop-${{ github.sha }}
+
+      - name: Build proxy docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: '{{defaultContext}}:proxy'
+          file: 'Dockerfile.mtr'
+          platforms: linux/amd64,linux/arm64,linux/386,linux/arm/v7
+          push: true
+          tags: |
+            xddxdd/bird-lgproxy-go:develop-mtr
+            xddxdd/bird-lgproxy-go:develop-${{ github.sha }}-mtr
+            ghcr.io/xddxdd/bird-lg-go:proxy-develop-mtr
+            ghcr.io/xddxdd/bird-lg-go:proxy-develop-${{ github.sha }}-mtr

.github/workflows/release.yaml

@@ -85,3 +85,16 @@ jobs:
             xddxdd/bird-lgproxy-go:${{ github.event.release.tag_name }}
             ghcr.io/xddxdd/bird-lg-go:proxy
             ghcr.io/xddxdd/bird-lg-go:proxy-${{ github.event.release.tag_name }}
+
+      - name: Build proxy docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: '{{defaultContext}}:proxy'
+          file: 'Dockerfile.mtr'
+          platforms: linux/amd64,linux/arm64,linux/386,linux/arm/v7
+          push: true
+          tags: |
+            xddxdd/bird-lgproxy-go:latest-mtr
+            xddxdd/bird-lgproxy-go:${{ github.event.release.tag_name }}-mtr
+            ghcr.io/xddxdd/bird-lg-go:proxy-mtr
+            ghcr.io/xddxdd/bird-lg-go:proxy-${{ github.event.release.tag_name }}-mtr

.gitignore

@@ -20,7 +20,3 @@ proxy/proxy
 
 # don't include generated bindata file
 frontend/bindata.go
-
-# don't include generated Dockerfiles
-frontend/Dockerfile.*
-proxy/Dockerfile.*

README.md

@@ -125,7 +125,7 @@ Configuration is handled by [viper](https://github.com/spf13/viper), any config
 
 | Config Key | Parameter | Environment Variable | Description |
 | ---------- | --------- | -------------------- | ----------- |
-| allowed_ips | --allowed | ALLOWED_IPS | IPs allowed to access this proxy, separated by commas. Don't set to allow all IPs. (default "") |
+| allowed_ips | --allowed | ALLOWED_IPS | IPs or networks allowed to access this proxy, separated by commas. Don't set to allow all IPs. (default "") |
 | bird_socket | --bird | BIRD_SOCKET | socket file for bird, set either in parameter or environment variable BIRD_SOCKET (default "/var/run/bird/bird.ctl") |
 | listen | --listen | BIRDLG_PROXY_PORT | listen address, set either in parameter or environment variable  BIRDLG_PROXY_PORT(default "8000") |
 | traceroute_bin | --traceroute_bin | BIRDLG_TRACEROUTE_BIN | traceroute binary file, set either in parameter or environment variable  BIRDLG_TRACEROUTE_BIN |
@@ -167,6 +167,7 @@ Example: the following docker-compose.yml entry does the same as above, but by s
 services:
   bird-lgproxy:
     # Use xddxdd/bird-lgproxy-go:develop for the latest build from master branch
+    # Use xddxdd/bird-lgproxy-go:latest-mtr to use MTR instead of Traceroute
     image: xddxdd/bird-lgproxy-go:latest
     container_name: bird-lgproxy
     restart: always

RELEASE

@@ -1 +1 @@
-v1.3.2.2
+v1.3.7.1

frontend/assets/templates/page.tpl

@@ -8,6 +8,19 @@
 <meta name="renderer" content="webkit">
 <title>{{ html .Title }}</title>
 <link rel="stylesheet" href="/static/jsdelivr/npm/bootstrap@4.5.1/dist/css/bootstrap.min.css" integrity="sha256-VoFZSlmyTXsegReQCNmbXrS4hBBUl/cexZvPmPWoJsY=" crossorigin="anonymous">
+<style>
+.navbar-nav {
+	flex-wrap: wrap;
+}
+@media (min-width: 768px) {
+	.navbar form {
+		min-width: 400px;
+	}
+	.nav-link {
+		padding: 0.2rem 0.5rem !important;
+	}
+}
+</style>
 <meta name="robots" content="noindex, nofollow">
 </head>
 <body>

frontend/go.mod

@@ -4,26 +4,30 @@ go 1.17
 
 require (
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
-	github.com/gorilla/handlers v1.5.1
+	github.com/gorilla/handlers v1.5.2
 	github.com/jarcoal/httpmock v1.3.1
 	github.com/magiconair/properties v1.8.7
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.16.0
+	github.com/spf13/viper v1.18.2
 )
 
 require (
 	github.com/felixge/httpsnoop v1.0.3 // indirect
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
-	github.com/spf13/afero v1.9.5 // indirect
-	github.com/spf13/cast v1.5.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
-	golang.org/x/sys v0.8.0 // indirect
-	golang.org/x/text v0.9.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

frontend/lgproxy.go

@@ -2,11 +2,14 @@ package main
 
 import (
 	"io"
+	"net"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/jarcoal/httpmock"
 )
 
 type channelData struct {
@@ -14,6 +17,29 @@ type channelData struct {
 	data string
 }
 
+func createConnectionTimeoutRoundTripper(timeout int) http.RoundTripper {
+	context := net.Dialer{
+		Timeout: time.Duration(timeout) * time.Second,
+	}
+
+	// Prefer httpmock's transport if activated, so unit tests can work
+	if http.DefaultTransport == httpmock.DefaultTransport {
+		return httpmock.DefaultTransport
+	}
+
+	return &http.Transport{
+		DialContext: context.DialContext,
+
+		// Default options from transport.go
+		Proxy:                 http.ProxyFromEnvironment,
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+}
+
 // Send commands to lgproxy instances in parallel, and retrieve their responses
 func batchRequest(servers []string, endpoint string, command string) []string {
 	// Channel and array for storing responses
@@ -47,7 +73,10 @@ func batchRequest(servers []string, endpoint string, command string) []string {
 			}
 			url := "http://" + hostname + ":" + strconv.Itoa(setting.proxyPort) + "/" + url.PathEscape(endpoint) + "?q=" + url.QueryEscape(command)
 			go func(url string, i int) {
-				client := http.Client{Timeout: time.Duration(setting.timeOut) * time.Second}
+				client := http.Client{
+					Transport: createConnectionTimeoutRoundTripper(setting.connectionTimeOut),
+					Timeout:   time.Duration(setting.timeOut) * time.Second,
+				}
 				response, err := client.Get(url)
 				if err != nil {
 					ch <- channelData{i, "request failed: " + err.Error() + "\n"}

frontend/main.go

@@ -7,24 +7,25 @@ import (
 )
 
 type settingType struct {
-	servers         []string
-	serversDisplay  []string
-	domain          string
-	proxyPort       int
-	whoisServer     string
-	listen          string
-	dnsInterface    string
-	netSpecificMode string
-	titleBrand      string
-	navBarBrand     string
-	navBarBrandURL  string
-	navBarAllServer string
-	navBarAllURL    string
-	bgpmapInfo      string
-	telegramBotName string
-	protocolFilter  []string
-	nameFilter      string
-	timeOut         int
+	servers           []string
+	serversDisplay    []string
+	domain            string
+	proxyPort         int
+	whoisServer       string
+	listen            string
+	dnsInterface      string
+	netSpecificMode   string
+	titleBrand        string
+	navBarBrand       string
+	navBarBrandURL    string
+	navBarAllServer   string
+	navBarAllURL      string
+	bgpmapInfo        string
+	telegramBotName   string
+	protocolFilter    []string
+	nameFilter        string
+	timeOut           int
+	connectionTimeOut int
 }
 
 var setting settingType

frontend/render.go

@@ -193,6 +193,11 @@ func summaryParse(data string, serverName string) (TemplateSummary, error) {
 			row.Info = strings.TrimSpace(lineSplitted[10])
 		}
 
+		// Dynamic BGP session, show without any color
+		if strings.Contains(row.Info, "Passive") {
+			row.MappedState = summaryStateMap["passive"]
+		}
+
 		// add to the result
 		args.Rows = append(args.Rows, row)
 	}

frontend/settings.go

@@ -9,23 +9,24 @@ import (
 )
 
 type viperSettingType struct {
-	Servers         string `mapstructure:"servers"`
-	Domain          string `mapstructure:"domain"`
-	ProxyPort       int    `mapstructure:"proxy_port"`
-	WhoisServer     string `mapstructure:"whois"`
-	Listen          string `mapstructure:"listen"`
-	DNSInterface    string `mapstructure:"dns_interface"`
-	NetSpecificMode string `mapstructure:"net_specific_mode"`
-	TitleBrand      string `mapstructure:"title_brand"`
-	NavBarBrand     string `mapstructure:"navbar_brand"`
-	NavBarBrandURL  string `mapstructure:"navbar_brand_url"`
-	NavBarAllServer string `mapstructure:"navbar_all_servers"`
-	NavBarAllURL    string `mapstructure:"navbar_all_url"`
-	BgpmapInfo      string `mapstructure:"bgpmap_info"`
-	TelegramBotName string `mapstructure:"telegram_bot_name"`
-	ProtocolFilter  string `mapstructure:"protocol_filter"`
-	NameFilter      string `mapstructure:"name_filter"`
-	TimeOut         int    `mapstructure:"timeout"`
+	Servers           string `mapstructure:"servers"`
+	Domain            string `mapstructure:"domain"`
+	ProxyPort         int    `mapstructure:"proxy_port"`
+	WhoisServer       string `mapstructure:"whois"`
+	Listen            string `mapstructure:"listen"`
+	DNSInterface      string `mapstructure:"dns_interface"`
+	NetSpecificMode   string `mapstructure:"net_specific_mode"`
+	TitleBrand        string `mapstructure:"title_brand"`
+	NavBarBrand       string `mapstructure:"navbar_brand"`
+	NavBarBrandURL    string `mapstructure:"navbar_brand_url"`
+	NavBarAllServer   string `mapstructure:"navbar_all_servers"`
+	NavBarAllURL      string `mapstructure:"navbar_all_url"`
+	BgpmapInfo        string `mapstructure:"bgpmap_info"`
+	TelegramBotName   string `mapstructure:"telegram_bot_name"`
+	ProtocolFilter    string `mapstructure:"protocol_filter"`
+	NameFilter        string `mapstructure:"name_filter"`
+	TimeOut           int    `mapstructure:"timeout"`
+	ConnectionTimeOut int    `mapstructure:"connection_timeout"`
 }
 
 // Parse settings with viper, and convert to legacy setting format
@@ -87,9 +88,12 @@ func parseSettings() {
 	pflag.String("name-filter", "", "protocol name regex to hide in summary tables (RE2 syntax); defaults to none if not set")
 	viper.BindPFlag("name_filter", pflag.Lookup("name-filter"))
 
-	pflag.Int("time-out", 120, "time before request timed out, in seconds; defaults to 120 if not set")
+	pflag.Int("time-out", 120, "time before backend HTTP request times out, in seconds; defaults to 120 if not set")
 	viper.BindPFlag("timeout", pflag.Lookup("time-out"))
 
+	pflag.Int("connection-time-out", 5, "time before backend TCP connection times out, in seconds; defaults to 5 if not set")
+	viper.BindPFlag("connection_timeout", pflag.Lookup("connection-time-out"))
+
 	pflag.Parse()
 
 	if err := viper.ReadInConfig(); err != nil {
@@ -139,6 +143,7 @@ func parseSettings() {
 
 	setting.nameFilter = viperSettings.NameFilter
 	setting.timeOut = viperSettings.TimeOut
+	setting.connectionTimeOut = viperSettings.ConnectionTimeOut
 
 	fmt.Printf("%#v\n", setting)
 }

proxy/Dockerfile.mtr

@@ -0,0 +1,31 @@
+FROM golang AS step_0
+
+ENV CGO_ENABLED=0 GO111MODULE=on
+WORKDIR /root
+COPY . .
+RUN go build -ldflags "-w -s" -o /proxy
+
+################################################################################
+
+FROM alpine:edge AS step_1
+
+WORKDIR /root
+RUN apk add --no-cache build-base linux-headers
+
+RUN wget https://www.bitwizard.nl/mtr/files/mtr-0.94.tar.gz \
+    -O mtr-0.94.tar.gz
+RUN tar xvf mtr-0.94.tar.gz \
+    && cd mtr-0.94 \
+    && ./configure --without-gtk --without-ncurses --without-jansson --without-ipinfo --disable-bash-completion \
+    && make -j4 LDFLAGS="-static" \
+    && strip /root/mtr-0.94/mtr \
+    && strip /root/mtr-0.94/mtr-packet
+
+################################################################################
+
+FROM scratch AS step_2
+ENV PATH=/
+COPY --from=step_0 /proxy /
+COPY --from=step_1 /root/mtr-0.94/mtr /
+COPY --from=step_1 /root/mtr-0.94/mtr-packet /
+ENTRYPOINT ["/proxy"]

proxy/go.mod

@@ -4,25 +4,29 @@ go 1.17
 
 require (
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
-	github.com/gorilla/handlers v1.5.1
+	github.com/gorilla/handlers v1.5.2
 	github.com/magiconair/properties v1.8.7
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.16.0
+	github.com/spf13/viper v1.18.2
 )
 
 require (
 	github.com/felixge/httpsnoop v1.0.3 // indirect
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
-	github.com/spf13/afero v1.9.5 // indirect
-	github.com/spf13/cast v1.5.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
-	golang.org/x/sys v0.8.0 // indirect
-	golang.org/x/text v0.9.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

proxy/main.go

@@ -22,8 +22,8 @@ func invalidHandler(httpW http.ResponseWriter, httpR *http.Request) {
 }
 
 func hasAccess(remoteAddr string) bool {
-	// setting.allowedIPs will always have at least one element because of how it's defined
-	if len(setting.allowedIPs) == 0 {
+	// setting.allowedNets will always have at least one element because of how it's defined
+	if len(setting.allowedNets) == 0 {
 		return true
 	}
 
@@ -40,8 +40,8 @@ func hasAccess(remoteAddr string) bool {
 		return false
 	}
 
-	for _, allowedIP := range setting.allowedIPs {
-		if ipObject.Equal(allowedIP) {
+	for _, net := range setting.allowedNets {
+		if net.Contains(ipObject) {
 			return true
 		}
 	}
@@ -49,7 +49,7 @@ func hasAccess(remoteAddr string) bool {
 	return false
 }
 
-// Access handler, check to see if client IP in allowed IPs, continue if it is, send to invalidHandler if not
+// Access handler, check to see if client IP in allowed nets, continue if it is, send to invalidHandler if not
 func accessHandler(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(httpW http.ResponseWriter, httpR *http.Request) {
 		if hasAccess(httpR.RemoteAddr) {
@@ -61,12 +61,12 @@ func accessHandler(next http.Handler) http.Handler {
 }
 
 type settingType struct {
-	birdSocket string
-	listen     string
-	allowedIPs []net.IP
-	tr_bin     string
-	tr_flags   []string
-	tr_raw     bool
+	birdSocket  string
+	listen      string
+	allowedNets []*net.IPNet
+	tr_bin      string
+	tr_flags    []string
+	tr_raw      bool
 }
 
 var setting settingType

proxy/main_test.go

@@ -10,42 +10,61 @@ import (
 )
 
 func TestHasAccessNotConfigured(t *testing.T) {
-	setting.allowedIPs = []net.IP{}
+	setting.allowedNets = []*net.IPNet{}
 	assert.Equal(t, hasAccess("whatever"), true)
 }
 
 func TestHasAccessAllowIPv4(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("1.2.3.4")}
+	_, netip, _ := net.ParseCIDR("1.2.3.4/32")
+	setting.allowedNets = []*net.IPNet{netip}
+	assert.Equal(t, hasAccess("1.2.3.4:4321"), true)
+}
+
+func TestHasAccessAllowIPv4Net(t *testing.T) {
+	_, netip, _ := net.ParseCIDR("1.2.3.0/24")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("1.2.3.4:4321"), true)
 }
 
 func TestHasAccessDenyIPv4(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("4.3.2.1")}
+	_, netip, _ := net.ParseCIDR("4.3.2.1/32")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("1.2.3.4:4321"), false)
 }
 
 func TestHasAccessAllowIPv6(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("2001:db8::1")}
+	_, netip, _ := net.ParseCIDR("2001:db8::1/128")
+	setting.allowedNets = []*net.IPNet{netip}
+	assert.Equal(t, hasAccess("[2001:db8::1]:4321"), true)
+}
+
+func TestHasAccessAllowIPv6Net(t *testing.T) {
+	_, netip, _ := net.ParseCIDR("2001:db8::/64")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("[2001:db8::1]:4321"), true)
 }
 
 func TestHasAccessAllowIPv6DifferentForm(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("2001:0db8::1")}
+	_, netip, _ := net.ParseCIDR("2001:db8::1/128")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("[2001:db8::1]:4321"), true)
 }
 
 func TestHasAccessDenyIPv6(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("2001:db8::2")}
+	_, netip, _ := net.ParseCIDR("2001:db8::2/128")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("[2001:db8::1]:4321"), false)
 }
 
 func TestHasAccessBadClientIP(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("1.2.3.4")}
+	_, netip, _ := net.ParseCIDR("1.2.3.4/32")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("not an IP"), false)
 }
 
 func TestHasAccessBadClientIPPort(t *testing.T) {
-	setting.allowedIPs = []net.IP{net.ParseIP("1.2.3.4")}
+	_, netip, _ := net.ParseCIDR("1.2.3.4/32")
+	setting.allowedNets = []*net.IPNet{netip}
 	assert.Equal(t, hasAccess("not an IP:not a port"), false)
 }
 
@@ -57,7 +76,8 @@ func TestAccessHandlerAllow(t *testing.T) {
 	r.RemoteAddr = "1.2.3.4:4321"
 	w := httptest.NewRecorder()
 
-	setting.allowedIPs = []net.IP{net.ParseIP("1.2.3.4")}
+	_, netip, _ := net.ParseCIDR("1.2.3.4/32")
+	setting.allowedNets = []*net.IPNet{netip}
 
 	wrappedHandler.ServeHTTP(w, r)
 	assert.Equal(t, w.Code, http.StatusNotFound)
@@ -71,7 +91,8 @@ func TestAccessHandlerDeny(t *testing.T) {
 	r.RemoteAddr = "1.2.3.4:4321"
 	w := httptest.NewRecorder()
 
-	setting.allowedIPs = []net.IP{net.ParseIP("4.3.2.1")}
+	_, netip, _ := net.ParseCIDR("4.3.2.1/32")
+	setting.allowedNets = []*net.IPNet{netip}
 
 	wrappedHandler.ServeHTTP(w, r)
 	assert.Equal(t, w.Code, http.StatusInternalServerError)

proxy/settings.go

@@ -13,7 +13,7 @@ import (
 type viperSettingType struct {
 	BirdSocket      string `mapstructure:"bird_socket"`
 	Listen          string `mapstructure:"listen"`
-	AllowedIPs      string `mapstructure:"allowed_ips"`
+	AllowedNets     string `mapstructure:"allowed_ips"`
 	TracerouteBin   string `mapstructure:"traceroute_bin"`
 	TracerouteFlags string `mapstructure:"traceroute_flags"`
 	TracerouteRaw   bool   `mapstructure:"traceroute_raw"`
@@ -40,7 +40,7 @@ func parseSettings() {
 	pflag.String("listen", "8000", "listen address, set either in parameter or environment variable BIRDLG_PROXY_PORT")
 	viper.BindPFlag("listen", pflag.Lookup("listen"))
 
-	pflag.String("allowed", "", "IPs allowed to access this proxy, separated by commas. Don't set to allow all IPs.")
+	pflag.String("allowed", "", "IPs or networks allowed to access this proxy, separated by commas. Don't set to allow all IPs.")
 	viper.BindPFlag("allowed_ips", pflag.Lookup("allowed"))
 
 	pflag.String("traceroute_bin", "", "traceroute binary file, set either in parameter or environment variable BIRDLG_TRACEROUTE_BIN")
@@ -66,18 +66,31 @@ func parseSettings() {
 	setting.birdSocket = viperSettings.BirdSocket
 	setting.listen = viperSettings.Listen
 
-	if viperSettings.AllowedIPs != "" {
-		for _, ip := range strings.Split(viperSettings.AllowedIPs, ",") {
-			ipObject := net.ParseIP(ip)
-			if ipObject == nil {
-				fmt.Printf("Parse IP %s failed\n", ip)
-				continue
+	if viperSettings.AllowedNets != "" {
+		for _, arg := range strings.Split(viperSettings.AllowedNets, ",") {
+
+			// if argument is an IP address, convert to CIDR by adding a suitable mask
+			if !strings.Contains(arg, "/") {
+				if strings.Contains(arg, ":") {
+					// IPv6 address with /128 mask
+					arg += "/128"
+				} else {
+					// IPv4 address with /32 mask
+					arg += "/32"
+				}
 			}
 
-			setting.allowedIPs = append(setting.allowedIPs, ipObject)
+			// parse the network
+			_, netip, err := net.ParseCIDR(arg)
+			if err != nil {
+				fmt.Printf("Failed to parse CIDR %s: %s\n", arg, err.Error())
+				continue
+			}
+			setting.allowedNets = append(setting.allowedNets, netip)
+
 		}
 	} else {
-		setting.allowedIPs = []net.IP{}
+		setting.allowedNets = []*net.IPNet{}
 	}
 
 	var err error