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Add feature to get the right client port when using a trusted proxy

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This commit is contained in:
Daniel Carrillo 2022-05-01 19:47:27 +02:00
parent 9070e9a2c2
commit 7c70abf07f
Signed by: dcarrillo
GPG Key ID: E4CD5C09DAED6E16
7 changed files with 178 additions and 64 deletions
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2
Makefile
View File

@ -16,7 +16,7 @@ integration-test:
.PHONY: install-tools
install-tools:
@command golangci-lint > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOPATH)/bin v1.45.0; \
curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOPATH)/bin v1.45.2; \
fi
@command $(GOPATH)/shadow > /dev/null 2>&1; if [ $$? -ne 0 ]; then \

19
README.md
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@ -13,7 +13,7 @@
- [Examples](#examples)
- [Run a default TCP server](#run-a-default-tcp-server)
- [Run a TLS (HTTP/2) server only](#run-a-tls-http2-server-only)
- [Run a default TCP server with a custom template and trust a custom header set by an upstream proxy](#run-a-default-tcp-server-with-a-custom-template-and-trust-a-custom-header-set-by-an-upstream-proxy)
- [Run a default TCP server with a custom template and trust a pair of custom headers set by an upstream proxy](#run-a-default-tcp-server-with-a-custom-template-and-trust-a-pair-of-custom-headers-set-by-an-upstream-proxy)
- [Download](#download)
- [Docker](#docker)
- [Run a container locally using test databases](#run-a-container-locally-using-test-databases)
@ -36,7 +36,7 @@ curl -6 ifconfig.es
## Features
- TLS and HTTP/2.
- Can run behind a proxy by trusting a custom header (usually `X-Real-IP`) to figure out the source IP address.
- Can run behind a proxy by trusting a custom header (usually `X-Real-IP`) to figure out the source IP address. It also supports a custom header to resolve the client port, if the proxy can only add a header for the IP (for example a fixed header from CDNs) the client port is shown as unknown.
- IPv4 and IPv6.
- Geolocation info including ASN. This feature is possible thanks to [maxmind](https://dev.maxmind.com/geoip/geolite2-free-geolocation-data?lang=en) GeoLite2 databases. In order to use these databases, a license key is needed. Please visit Maxmind site for further instructions and get a free license.
- High performance.
@ -47,6 +47,7 @@ curl -6 ifconfig.es
## Endpoints
- https://ifconfig.es/
- https://ifconfig.es/client-port
- https://ifconfig.es/json (this is the same as `curl -H "Accept: application/json" https://ifconfig.es/`)
- https://ifconfig.es/geo
- https://ifconfig.es/geo/city
@ -72,9 +73,11 @@ Golang >= 1.17 is required. Previous versions may work.
## Usage
```text
Usage of ./whatismyip:
Usage of whatismyip:
-bind string
Listening address (see https://pkg.go.dev/net?#Listen) (default ":8080")
-enable-secure-headers
Add sane security-related headers to every response
-geoip2-asn string
Path to GeoIP2 ASN database
-geoip2-city string
@ -88,7 +91,9 @@ Usage of ./whatismyip:
-tls-key string
When using TLS, path to private key file
-trusted-header string
Trusted request header for remote IP (e.g. X-Real-IP)
Trusted request header for remote IP (e.g. X-Real-IP). When using this feature if -trusted-port-header is not set the client port is shown as 'unknown'
-trusted-port-header string
Trusted request header for remote client port (e.g. X-Real-Port). When this parameter is set -trusted-header becomes mandatory
-version
Output version information and exit
```
@ -108,11 +113,11 @@ Usage of ./whatismyip:
-bind "" -tls-bind :8081 -tls-crt ./test/server.pem -tls-key ./test/server.key
```
### Run a default TCP server with a custom template and trust a custom header set by an upstream proxy
### Run a default TCP server with a custom template and trust a pair of custom headers set by an upstream proxy
```bash
./whatismyip -geoip2-city ./test/GeoIP2-City-Test.mmdb -geoip2-asn ./test/GeoLite2-ASN-Test.mmdb \
-trusted-header X-Real-IP -template mytemplate.tmpl
-trusted-header X-Real-IP -trusted-port-header X-Real-Port -template mytemplate.tmpl
```
## Download
@ -121,7 +126,7 @@ Download latest version from https://github.com/dcarrillo/whatismyip/releases
## Docker
An ultra-light (~9MB) image is available.
An ultra-light (~10MB) image is available at [docker hub](https://hub.docker.com/r/dcarrillo/whatismyip).
### Run a container locally using test databases

18
internal/setting/app.go
View File

@ -27,6 +27,7 @@ type settings struct {
TLSCrtPath string
TLSKeyPath string
TrustedHeader string
TrustedPortHeader string
EnableSecureHeaders bool
Server serverSettings
version bool
@ -74,6 +75,11 @@ func Setup(args []string) (output string, err error) {
"",
"Trusted request header for remote IP (e.g. X-Real-IP)",
)
flags.StringVar(&App.TrustedPortHeader,
"trusted-port-header",
"",
"Trusted request header for remote client port (e.g. X-Real-Port)",
)
flags.BoolVar(&App.version, "version", false, "Output version information and exit")
flags.BoolVar(
&App.EnableSecureHeaders,
@ -91,21 +97,25 @@ func Setup(args []string) (output string, err error) {
return fmt.Sprintf("whatismyip version %s", core.Version), ErrVersion
}
if App.TrustedPortHeader != "" && App.TrustedHeader == "" {
return "", fmt.Errorf("truster-header is mandatory when truster-port-header is set\n")
}
if App.GeodbPath.City == "" || App.GeodbPath.ASN == "" {
return "", fmt.Errorf("geoip2-city and geoip2-asn parameters are mandatory")
return "", fmt.Errorf("geoip2-city and geoip2-asn parameters are mandatory\n")
}
if (App.TLSAddress != "") && (App.TLSCrtPath == "" || App.TLSKeyPath == "") {
return "", fmt.Errorf("In order to use TLS -tls-crt and -tls-key flags are mandatory")
return "", fmt.Errorf("In order to use TLS -tls-crt and -tls-key flags are mandatory\n")
}
if App.TemplatePath != "" {
info, err := os.Stat(App.TemplatePath)
if os.IsNotExist(err) {
return "", fmt.Errorf("%s no such file or directory", App.TemplatePath)
return "", fmt.Errorf("%s no such file or directory\n", App.TemplatePath)
}
if info.IsDir() {
return "", fmt.Errorf("%s must be a file", App.TemplatePath)
return "", fmt.Errorf("%s must be a file\n", App.TemplatePath)
}
}

58
internal/setting/app_test.go
View File

@ -8,51 +8,51 @@ import (
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestParseMandatoryFlags(t *testing.T) {
var mandatoryFlags = []struct {
args []string
conf settings
}{
{
[]string{},
settings{},
},
{
[]string{"-geoip2-city", "/city-path"},
settings{},
},
{
[]string{"-geoip2-asn", "/asn-path"},
settings{},
},
{
[]string{
"-geoip2-city", "/city-path", "-geoip2-asn", "/asn-path", "-tls-bind", ":9000",
},
settings{},
},
{
[]string{
"-geoip2-city", "/city-path", "-geoip2-asn", "/asn-path", "-tls-bind", ":9000",
"-tls-crt", "/crt-path",
},
settings{},
},
{
[]string{
"-geoip2-city", "/city-path", "-geoip2-asn", "/asn-path", "-tls-bind", ":9000",
"-tls-key", "/key-path",
},
settings{},
},
{
[]string{
"-geoip2-city", "/city-path", "-geoip2-asn", "/asn-path", "-bind", ":8000",
"-trusted-port-header", "port-header",
},
},
}
for _, tt := range mandatoryFlags {
t.Run(strings.Join(tt.args, " "), func(t *testing.T) {
_, err := Setup(tt.args)
assert.NotNil(t, err)
require.NotNil(t, err)
assert.Contains(t, err.Error(), "mandatory")
})
}
@ -70,13 +70,7 @@ func TestParseFlags(t *testing.T) {
City: "/city-path",
ASN: "/asn-path",
},
TemplatePath: "",
BindAddress: ":8080",
TLSAddress: "",
TLSCrtPath: "",
TLSKeyPath: "",
TrustedHeader: "",
EnableSecureHeaders: false,
Server: serverSettings{
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
@ -90,13 +84,7 @@ func TestParseFlags(t *testing.T) {
City: "/city-path",
ASN: "/asn-path",
},
TemplatePath: "",
BindAddress: ":8001",
TLSAddress: "",
TLSCrtPath: "",
TLSKeyPath: "",
TrustedHeader: "",
EnableSecureHeaders: false,
Server: serverSettings{
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
@ -113,13 +101,29 @@ func TestParseFlags(t *testing.T) {
City: "/city-path",
ASN: "/asn-path",
},
TemplatePath: "",
BindAddress: ":8080",
TLSAddress: ":9000",
TLSCrtPath: "/crt-path",
TLSKeyPath: "/key-path",
TrustedHeader: "",
EnableSecureHeaders: false,
Server: serverSettings{
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
},
},
},
{
[]string{
"-geoip2-city", "/city-path", "-geoip2-asn", "/asn-path",
"-trusted-header", "header", "-trusted-port-header", "port-header",
},
settings{
GeodbPath: geodbPath{
City: "/city-path",
ASN: "/asn-path",
},
BindAddress: ":8080",
TrustedHeader: "header",
TrustedPortHeader: "port-header",
Server: serverSettings{
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
@ -136,11 +140,7 @@ func TestParseFlags(t *testing.T) {
City: "/city-path",
ASN: "/asn-path",
},
TemplatePath: "",
BindAddress: ":8080",
TLSAddress: "",
TLSCrtPath: "",
TLSKeyPath: "",
TrustedHeader: "header",
EnableSecureHeaders: true,
Server: serverSettings{
@ -154,7 +154,7 @@ func TestParseFlags(t *testing.T) {
for _, tt := range flags {
t.Run(strings.Join(tt.args, " "), func(t *testing.T) {
_, err := Setup(tt.args)
assert.Nil(t, err)
require.Nil(t, err)
assert.True(t, reflect.DeepEqual(App, tt.conf))
})
}
@ -192,6 +192,6 @@ func TestParseFlagTemplate(t *testing.T) {
"-template", "/",
}
_, err = Setup(flags)
assert.Error(t, err)
require.Error(t, err)
assert.Contains(t, err.Error(), "must be a file")
}

27
router/generic.go
View File

@ -44,15 +44,31 @@ func getRoot(ctx *gin.Context) {
}
}
func getClientPort(ctx *gin.Context) string {
var port string
if setting.App.TrustedPortHeader == "" {
if setting.App.TrustedHeader != "" {
port = "unknown"
} else {
_, port, _ = net.SplitHostPort(ctx.Request.RemoteAddr)
}
} else {
port = ctx.GetHeader(setting.App.TrustedPortHeader)
if port == "" {
port = "unknown"
}
}
return port
}
func getClientPortAsString(ctx *gin.Context) {
_, port, _ := net.SplitHostPort(ctx.Request.RemoteAddr)
ctx.String(http.StatusOK, port+"\n")
ctx.String(http.StatusOK, getClientPort(ctx)+"\n")
}
func getAllAsString(ctx *gin.Context) {
output := "IP: " + ctx.ClientIP() + "\n"
_, port, _ := net.SplitHostPort(ctx.Request.RemoteAddr)
output += "Client Port: " + port + "\n"
output += "Client Port: " + getClientPort(ctx) + "\n"
r := service.Geo{IP: net.ParseIP(ctx.ClientIP())}
if record := r.LookUpCity(); record != nil {
@ -83,11 +99,10 @@ func jsonOutput(ctx *gin.Context) JSONResponse {
version = 6
}
_, port, _ := net.SplitHostPort(ctx.Request.RemoteAddr)
return JSONResponse{
IP: ctx.ClientIP(),
IPVersion: version,
ClientPort: port,
ClientPort: getClientPort(ctx),
Country: cityRecord.Country.Names["en"],
CountryCode: cityRecord.Country.ISOCode,
City: cityRecord.City.Names["en"],

89
router/generic_test.go
View File

@ -6,6 +6,7 @@ import (
"net/http/httptest"
"testing"
"github.com/dcarrillo/whatismyip/internal/setting"
"github.com/stretchr/testify/assert"
)
@ -97,16 +98,78 @@ func TestHost(t *testing.T) {
}
func TestClientPort(t *testing.T) {
type args struct {
params []string
headers map[string][]string
}
type expected struct {
body string
}
tests := []struct {
name string
args args
expected string
}{
{
name: "No trusted headers set",
expected: "1000\n",
},
{
name: "Trusted header only set",
args: args{
params: []string{
"-geoip2-city", "city",
"-geoip2-asn", "asn",
"-trusted-header", trustedHeader,
},
},
expected: "unknown\n",
},
{
name: "Trusted and port header set but not included in headers",
args: args{
params: []string{
"-geoip2-city", "city",
"-geoip2-asn", "asn",
"-trusted-header", trustedHeader,
"-trusted-port-header", trustedPortHeader,
},
},
expected: "unknown\n",
},
{
name: "Trusted and port header set and included in headers",
args: args{
params: []string{
"-geoip2-city", "city",
"-geoip2-asn", "asn",
"-trusted-header", trustedHeader,
"-trusted-port-header", trustedPortHeader,
},
headers: map[string][]string{
trustedHeader: {testIP.ipv4},
trustedPortHeader: {"1001"},
},
},
expected: "1001\n",
},
}
for _, tt := range tests {
_, _ = setting.Setup(tt.args.params)
t.Run(tt.name, func(t *testing.T) {
req, _ := http.NewRequest("GET", "/client-port", nil)
req.RemoteAddr = net.JoinHostPort(testIP.ipv4, "1000")
req.Header.Set(trustedHeader, testIP.ipv4)
req.Header = tt.args.headers
w := httptest.NewRecorder()
app.ServeHTTP(w, req)
assert.Equal(t, 200, w.Code)
assert.Equal(t, contentType.text, w.Header().Get("Content-Type"))
assert.Equal(t, "1000\n", w.Body.String())
assert.Equal(t, tt.expected, w.Body.String())
})
}
}
func TestNotFound(t *testing.T) {
@ -120,6 +183,15 @@ func TestNotFound(t *testing.T) {
}
func TestJSON(t *testing.T) {
_, _ = setting.Setup(
[]string{
"-geoip2-city", "city",
"-geoip2-asn", "asn",
"-trusted-header", trustedHeader,
"-trusted-port-header", trustedPortHeader,
},
)
type args struct {
ip string
}
@ -149,6 +221,7 @@ func TestJSON(t *testing.T) {
req.RemoteAddr = net.JoinHostPort(tt.args.ip, "1000")
req.Host = "test"
req.Header.Set(trustedHeader, tt.args.ip)
req.Header.Set(trustedPortHeader, "1001")
w := httptest.NewRecorder()
app.ServeHTTP(w, req)
@ -162,7 +235,7 @@ func TestJSON(t *testing.T) {
func TestAll(t *testing.T) {
expected := `IP: 81.2.69.192
Client Port: 1000
Client Port: 1001
City: London
Country: United Kingdom
Country Code: GB
@ -177,12 +250,22 @@ ASN Organization:
Header1: one
Host: test
X-Real-Ip: 81.2.69.192
X-Real-Port: 1001
`
_, _ = setting.Setup(
[]string{
"-geoip2-city", "city",
"-geoip2-asn", "asn",
"-trusted-header", trustedHeader,
"-trusted-port-header", trustedPortHeader,
},
)
req, _ := http.NewRequest("GET", "/all", nil)
req.RemoteAddr = net.JoinHostPort(testIP.ipv4, "1000")
req.Host = "test"
req.Header.Set(trustedHeader, testIP.ipv4)
req.Header.Set(trustedPortHeader, "1001")
req.Header.Set("Header1", "one")
w := httptest.NewRecorder()

5
router/setup_test.go
View File

@ -34,11 +34,12 @@ var (
text: "text/plain; charset=utf-8",
json: "application/json; charset=utf-8",
}
jsonIPv4 = `{"client_port":"1000","ip":"81.2.69.192","ip_version":4,"country":"United Kingdom","country_code":"GB","city":"London","latitude":51.5142,"longitude":-0.0931,"postal_code":"","time_zone":"Europe/London","asn":0,"asn_organization":"","host":"test","headers":{"X-Real-Ip":["81.2.69.192"]}}`
jsonIPv6 = `{"asn":3352, "asn_organization":"TELEFONICA DE ESPANA", "city":"", "client_port":"1000", "country":"", "country_code":"", "headers":{"X-Real-Ip":["2a02:9000::1"]}, "host":"test", "ip":"2a02:9000::1", "ip_version":6, "latitude":0, "longitude":0, "postal_code":"", "time_zone":""}`
jsonIPv4 = `{"client_port":"1001","ip":"81.2.69.192","ip_version":4,"country":"United Kingdom","country_code":"GB","city":"London","latitude":51.5142,"longitude":-0.0931,"postal_code":"","time_zone":"Europe/London","asn":0,"asn_organization":"","host":"test","headers":{"X-Real-Ip":["81.2.69.192"], "X-Real-Port":["1001"]}}`
jsonIPv6 = `{"asn":3352, "asn_organization":"TELEFONICA DE ESPANA", "city":"", "client_port":"1001", "country":"", "country_code":"", "headers":{"X-Real-Ip":["2a02:9000::1"], "X-Real-Port":["1001"]}, "host":"test", "ip":"2a02:9000::1", "ip_version":6, "latitude":0, "longitude":0, "postal_code":"", "time_zone":""}`
)
const trustedHeader = "X-Real-IP"
const trustedPortHeader = "X-Real-Port"
func TestMain(m *testing.M) {
app = gin.Default()