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realip_test.go
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realip_test.go
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package realip
import (
"net"
"net/http"
"net/http/httptest"
"testing"
"bytes"
"fmt"
"github.com/caddyserver/caddy"
"github.com/caddyserver/caddy/caddyhttp/httpserver"
)
func TestRealIP(t *testing.T) {
for i, test := range []struct {
actualIP string
headerVal string
expectedIP string
}{
{"1.2.3.4:123", "", "1.2.3.4:123"},
{"4.4.255.255:123", "", "4.4.255.255:123"},
{"4.5.0.0:123", "1.2.3.4", "1.2.3.4:123"},
// because 111.111.111.111 is NOT in a trusted subnet, the next in the chain should not be trusted
{"4.5.2.3:123", "1.2.6.7,5.6.7.8,111.111.111.111", "111.111.111.111:123"},
{"4.5.5.5:123", "NOTANIP", "4.5.5.5:123"},
{"aaaaaa", "1.2.3.4", "aaaaaa"},
{"aaaaaa:123", "1.2.3.4", "aaaaaa:123"},
{"4.5.2.3:123", "1.2.6.7,5.6.7.8,4.5.6.7", "5.6.7.8:123"},
// expectedIP is empty because the server should have returned a 403
// since the chain is longer than the configured max (5)
{"4.5.2.3:123", "1.2.6.7,5.6.7.8,4.5.6.7,5.6.7.8,4.5.6.7,1.2.3.4", ""},
} {
remoteAddr := ""
_, ipnet, err := net.ParseCIDR("4.5.0.0/16") // "4.5.x.x"
if err != nil {
t.Fatal(err)
}
he := &module{
next: httpserver.HandlerFunc(func(w http.ResponseWriter, r *http.Request) (int, error) {
remoteAddr = r.RemoteAddr
return 0, nil
}),
Header: "X-Real-IP",
MaxHops: 5,
From: []*net.IPNet{ipnet},
}
req, err := http.NewRequest("GET", "http://foo.tld/", nil)
if err != nil {
t.Fatalf("Test %d: Could not create HTTP request: %v", i, err)
}
req.RemoteAddr = test.actualIP
if test.headerVal != "" {
req.Header.Set("X-Real-IP", test.headerVal)
}
rec := httptest.NewRecorder()
he.ServeHTTP(rec, req)
if remoteAddr != test.expectedIP {
t.Errorf("Test %d: Expected '%s', but found '%s'", i, test.expectedIP, remoteAddr)
}
}
}
func TestCidrAndPresets(t *testing.T) {
tests := []struct {
rule string
presets []string
expected []string
}{
{"cloudflare", []string{"cloudflare"}, nil},
{"gcp", []string{"gcp"}, nil},
{"rackspace", []string{"rackspace"}, nil},
{"cloudflare rackspace gcp", []string{"cloudflare", "gcp", "rackspace"}, nil},
{"cloudflare { from 1.2.3.4/32\n}", []string{"cloudflare"}, []string{"1.2.3.4/32"}},
{"{ from gcp 1.2.3.4/32\n}", []string{"gcp"}, []string{"1.2.3.4/32"}},
{"{ from gcp rackspace\n}", []string{"gcp", "rackspace"}, nil},
{"{ from gcp\n from rackspace\n}", []string{"gcp", "rackspace"}, nil},
{"{ from rackspace\n from 1.2.3.4/32\n}", []string{"rackspace"}, []string{"1.2.3.4/32"}},
{"{ from 1.2.3.4/32 5.6.7.8/32\n}", nil, []string{"1.2.3.4/32", "5.6.7.8/32"}},
}
for i, test := range tests {
c := caddy.NewTestController("http", test.rule)
m := &module{}
err := parse(m, c)
if err != nil {
t.Fatalf("Test %d: failed while parsing: '%s'; got '%v'", i, test.rule, err)
}
var cidrs []*net.IPNet
for _, name := range test.presets {
if preset, ok := presets[name]; ok {
result, err := parseCidrs(i, preset)
if err != nil {
t.Fatal(err)
}
cidrs = append(cidrs, result...)
} else {
t.Fatalf("Test %d: Specified preset missing: %s", i, name)
}
}
result, err := parseCidrs(i, test.expected)
if err != nil {
t.Fatal(err)
}
cidrs = append(cidrs, result...)
for _, cidr := range cidrs {
found := false
for _, from := range m.From {
if bytes.Compare(from.IP, cidr.IP) == 0 && bytes.Compare(from.Mask, cidr.Mask) == 0 {
found = true
break
}
}
if !found {
t.Errorf("Test %d: Expected %q, but missing from result: %q", i, cidr, m.From)
}
}
}
}
func parseCidrs(i int, values []string) ([]*net.IPNet, error) {
var cidrs []*net.IPNet
for _, value := range values {
_, cidr, err := net.ParseCIDR(value)
if err != nil {
return nil, fmt.Errorf("Test %d: Failed to parse CIDR %q, got: %v", i, value, err)
}
cidrs = append(cidrs, cidr)
}
return cidrs, nil
}