2e9986c622
Allows the forward plugin to execute the next plugin based on the return code. Similar to the externally mainted alternate plugin https://github.com/coredns/alternate Based on the idea of chrisohaver@ in #6549 (comment) Also incoperated the request to rename `alternate` to `next` as an option I am having issues adding a proper test for functionality. Primarily, I do not know the code base enough and having multiple `dnstest.NewServer` with ResponseWriter does not work. From my testing these are "Singletons'' and only the last defined response writer is used for all servers Signed-off-by: Jasper Bernhardt <jasper.bernhardt@live.de>
384 lines
14 KiB
Go
384 lines
14 KiB
Go
package forward
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import (
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"os"
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"reflect"
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"strings"
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"testing"
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"github.com/coredns/caddy"
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"github.com/coredns/coredns/core/dnsserver"
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"github.com/coredns/coredns/plugin/pkg/proxy"
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"github.com/miekg/dns"
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)
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func TestSetup(t *testing.T) {
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tests := []struct {
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input string
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shouldErr bool
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expectedFrom string
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expectedIgnored []string
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expectedFails uint32
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expectedOpts proxy.Options
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expectedErr string
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}{
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// positive
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{"forward . 127.0.0.1", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain example.org\n}\n", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "example.org."}, ""},
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{"forward . 127.0.0.1 {\nexcept miek.nl\n}\n", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1 {\nmax_fails 3\n}\n", false, ".", nil, 3, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1 {\nforce_tcp\n}\n", false, ".", nil, 2, proxy.Options{ForceTCP: true, HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1 {\nprefer_udp\n}\n", false, ".", nil, 2, proxy.Options{PreferUDP: true, HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1 {\nforce_tcp\nprefer_udp\n}\n", false, ".", nil, 2, proxy.Options{PreferUDP: true, ForceTCP: true, HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1:53", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1:8080", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . [::1]:53", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . [2003::1]:53", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward . 127.0.0.1 \n", false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{"forward 10.9.3.0/18 127.0.0.1", false, "0.9.10.in-addr.arpa.", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, ""},
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{`forward . ::1
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forward com ::2`, false, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, "plugin"},
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// negative
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{"forward . a27.0.0.1", true, "", nil, 0, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, "not an IP"},
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{"forward . 127.0.0.1 {\nblaatl\n}\n", true, "", nil, 0, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, "unknown property"},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain\n}\n", true, "", nil, 0, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, "Wrong argument count or unexpected line ending after 'domain'"},
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{"forward . https://127.0.0.1 \n", true, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, "'https' is not supported as a destination protocol in forward: https://127.0.0.1"},
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{"forward xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 127.0.0.1 \n", true, ".", nil, 2, proxy.Options{HCRecursionDesired: true, HCDomain: "."}, "unable to normalize 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'"},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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fs, err := parseForward(c)
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: expected error but found %s for input %s", i, err, test.input)
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}
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if err != nil {
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if !test.shouldErr {
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t.Fatalf("Test %d: expected no error but found one for input %s, got: %v", i, test.input, err)
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}
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if !strings.Contains(err.Error(), test.expectedErr) {
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t.Errorf("Test %d: expected error to contain: %v, found error: %v, input: %s", i, test.expectedErr, err, test.input)
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}
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}
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if !test.shouldErr {
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f := fs[0]
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if f.from != test.expectedFrom {
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t.Errorf("Test %d: expected: %s, got: %s", i, test.expectedFrom, f.from)
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}
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if test.expectedIgnored != nil {
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if !reflect.DeepEqual(f.ignored, test.expectedIgnored) {
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t.Errorf("Test %d: expected: %q, actual: %q", i, test.expectedIgnored, f.ignored)
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}
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}
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if f.maxfails != test.expectedFails {
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t.Errorf("Test %d: expected: %d, got: %d", i, test.expectedFails, f.maxfails)
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}
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if f.opts != test.expectedOpts {
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t.Errorf("Test %d: expected: %v, got: %v", i, test.expectedOpts, f.opts)
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}
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}
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}
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}
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func TestSetupTLS(t *testing.T) {
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tests := []struct {
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input string
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shouldErr bool
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expectedServerName string
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expectedErr string
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}{
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// positive
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{`forward . tls://127.0.0.1 {
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tls_servername dns
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}`, false, "dns", ""},
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{`forward . 127.0.0.1 {
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tls_servername dns
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}`, false, "", ""},
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{`forward . 127.0.0.1 {
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tls
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}`, false, "", ""},
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{`forward . tls://127.0.0.1`, false, "", ""},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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fs, err := parseForward(c)
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f := fs[0]
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: expected error but found %s for input %s", i, err, test.input)
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}
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if err != nil {
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if !test.shouldErr {
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t.Errorf("Test %d: expected no error but found one for input %s, got: %v", i, test.input, err)
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}
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if !strings.Contains(err.Error(), test.expectedErr) {
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t.Errorf("Test %d: expected error to contain: %v, found error: %v, input: %s", i, test.expectedErr, err, test.input)
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}
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}
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if !test.shouldErr && test.expectedServerName != "" && test.expectedServerName != f.tlsConfig.ServerName {
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t.Errorf("Test %d: expected: %q, actual: %q", i, test.expectedServerName, f.tlsConfig.ServerName)
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}
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if !test.shouldErr && test.expectedServerName != "" && test.expectedServerName != f.proxies[0].GetHealthchecker().GetTLSConfig().ServerName {
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t.Errorf("Test %d: expected: %q, actual: %q", i, test.expectedServerName, f.proxies[0].GetHealthchecker().GetTLSConfig().ServerName)
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}
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}
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}
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func TestSetupResolvconf(t *testing.T) {
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const resolv = "resolv.conf"
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if err := os.WriteFile(resolv,
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[]byte(`nameserver 10.10.255.252
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nameserver 10.10.255.253`), 0666); err != nil {
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t.Fatalf("Failed to write resolv.conf file: %s", err)
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}
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defer os.Remove(resolv)
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const resolvIPV6 = "resolv-ipv6.conf"
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if err := os.WriteFile(resolvIPV6,
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[]byte(`nameserver 0388:d254:7aec:6892:9f7f:e93b:5806:1b0f%en0`), 0666); err != nil {
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t.Fatalf("Failed to write %v file: %s", resolvIPV6, err)
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}
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defer os.Remove(resolvIPV6)
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tests := []struct {
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input string
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shouldErr bool
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expectedErr string
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expectedNames []string
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}{
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// pass
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{`forward . ` + resolv, false, "", []string{"10.10.255.252:53", "10.10.255.253:53"}},
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// fail
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{`forward . /dev/null`, true, "no nameservers", nil},
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// IPV6 with local zone
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{`forward . ` + resolvIPV6, false, "", []string{"[0388:d254:7aec:6892:9f7f:e93b:5806:1b0f]:53"}},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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fs, err := parseForward(c)
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: expected error but found %s for input %s", i, err, test.input)
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continue
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}
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if err != nil {
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if !test.shouldErr {
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t.Errorf("Test %d: expected no error but found one for input %s, got: %v", i, test.input, err)
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}
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if !strings.Contains(err.Error(), test.expectedErr) {
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t.Errorf("Test %d: expected error to contain: %v, found error: %v, input: %s", i, test.expectedErr, err, test.input)
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}
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}
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if test.shouldErr {
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continue
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}
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f := fs[0]
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for j, n := range test.expectedNames {
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addr := f.proxies[j].Addr()
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if n != addr {
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t.Errorf("Test %d, expected %q, got %q", j, n, addr)
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}
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}
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for _, p := range f.proxies {
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p.Healthcheck() // this should almost always err, we don't care it shouldn't crash
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}
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}
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}
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func TestSetupMaxConcurrent(t *testing.T) {
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tests := []struct {
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input string
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shouldErr bool
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expectedVal int64
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expectedErr string
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}{
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// positive
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{"forward . 127.0.0.1 {\nmax_concurrent 1000\n}\n", false, 1000, ""},
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// negative
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{"forward . 127.0.0.1 {\nmax_concurrent many\n}\n", true, 0, "invalid"},
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{"forward . 127.0.0.1 {\nmax_concurrent -4\n}\n", true, 0, "negative"},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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fs, err := parseForward(c)
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: expected error but found %s for input %s", i, err, test.input)
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}
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if err != nil {
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if !test.shouldErr {
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t.Errorf("Test %d: expected no error but found one for input %s, got: %v", i, test.input, err)
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}
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if !strings.Contains(err.Error(), test.expectedErr) {
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t.Errorf("Test %d: expected error to contain: %v, found error: %v, input: %s", i, test.expectedErr, err, test.input)
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}
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}
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if test.shouldErr {
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continue
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}
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f := fs[0]
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if f.maxConcurrent != test.expectedVal {
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t.Errorf("Test %d: expected: %d, got: %d", i, test.expectedVal, f.maxConcurrent)
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}
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}
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}
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func TestSetupHealthCheck(t *testing.T) {
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tests := []struct {
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input string
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shouldErr bool
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expectedRecVal bool
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expectedDomain string
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expectedErr string
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}{
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// positive
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{"forward . 127.0.0.1\n", false, true, ".", ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s\n}\n", false, true, ".", ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s no_rec\n}\n", false, false, ".", ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s no_rec domain example.org\n}\n", false, false, "example.org.", ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain example.org\n}\n", false, true, "example.org.", ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain .\n}\n", false, true, ".", ""},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain example.org.\n}\n", false, true, "example.org.", ""},
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// negative
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{"forward . 127.0.0.1 {\nhealth_check no_rec\n}\n", true, true, ".", "time: invalid duration"},
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{"forward . 127.0.0.1 {\nhealth_check domain example.org\n}\n", true, true, "example.org", "time: invalid duration"},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s rec\n}\n", true, true, ".", "health_check: unknown option rec"},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain\n}\n", true, true, ".", "Wrong argument count or unexpected line ending after 'domain'"},
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{"forward . 127.0.0.1 {\nhealth_check 0.5s domain example..org\n}\n", true, true, ".", "health_check: invalid domain name"},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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fs, err := parseForward(c)
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: expected error but found %s for input %s", i, err, test.input)
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}
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if err != nil {
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if !test.shouldErr {
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t.Errorf("Test %d: expected no error but found one for input %s, got: %v", i, test.input, err)
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}
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if !strings.Contains(err.Error(), test.expectedErr) {
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t.Errorf("Test %d: expected error to contain: %v, found error: %v, input: %s", i, test.expectedErr, err, test.input)
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}
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}
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if test.shouldErr {
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continue
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}
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f := fs[0]
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if f.opts.HCRecursionDesired != test.expectedRecVal || f.proxies[0].GetHealthchecker().GetRecursionDesired() != test.expectedRecVal ||
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f.opts.HCDomain != test.expectedDomain || f.proxies[0].GetHealthchecker().GetDomain() != test.expectedDomain || !dns.IsFqdn(f.proxies[0].GetHealthchecker().GetDomain()) {
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t.Errorf("Test %d: expectedRec: %v, got: %v. expectedDomain: %s, got: %s. ", i, test.expectedRecVal, f.opts.HCRecursionDesired, test.expectedDomain, f.opts.HCDomain)
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}
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}
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}
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func TestMultiForward(t *testing.T) {
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input := `
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forward 1st.example.org 10.0.0.1
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forward 2nd.example.org 10.0.0.2
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forward 3rd.example.org 10.0.0.3
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`
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c := caddy.NewTestController("dns", input)
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setup(c)
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dnsserver.NewServer("", []*dnsserver.Config{dnsserver.GetConfig(c)})
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handlers := dnsserver.GetConfig(c).Handlers()
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f1, ok := handlers[0].(*Forward)
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if !ok {
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t.Fatalf("expected first plugin to be Forward, got %v", reflect.TypeOf(f1.Next))
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}
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if f1.from != "1st.example.org." {
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t.Errorf("expected first forward from \"1st.example.org.\", got %q", f1.from)
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}
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if f1.Next == nil {
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t.Fatal("expected first forward to point to next forward instance, not nil")
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}
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f2, ok := f1.Next.(*Forward)
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if !ok {
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t.Fatalf("expected second plugin to be Forward, got %v", reflect.TypeOf(f1.Next))
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}
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if f2.from != "2nd.example.org." {
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t.Errorf("expected second forward from \"2nd.example.org.\", got %q", f2.from)
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}
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if f2.Next == nil {
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t.Fatal("expected second forward to point to third forward instance, got nil")
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}
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f3, ok := f2.Next.(*Forward)
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if !ok {
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t.Fatalf("expected third plugin to be Forward, got %v", reflect.TypeOf(f2.Next))
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}
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if f3.from != "3rd.example.org." {
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t.Errorf("expected third forward from \"3rd.example.org.\", got %q", f3.from)
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}
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if f3.Next != nil {
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t.Error("expected third plugin to be last, but Next is not nil")
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}
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}
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func TestNextAlternate(t *testing.T) {
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testsValid := []struct {
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input string
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expected []int
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}{
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{"forward . 127.0.0.1 {\nnext NXDOMAIN\n}\n", []int{dns.RcodeNameError}},
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{"forward . 127.0.0.1 {\nnext SERVFAIL\n}\n", []int{dns.RcodeServerFailure}},
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{"forward . 127.0.0.1 {\nnext NXDOMAIN SERVFAIL\n}\n", []int{dns.RcodeNameError, dns.RcodeServerFailure}},
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{"forward . 127.0.0.1 {\nnext NXDOMAIN SERVFAIL REFUSED\n}\n", []int{dns.RcodeNameError, dns.RcodeServerFailure, dns.RcodeRefused}},
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}
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for i, test := range testsValid {
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c := caddy.NewTestController("dns", test.input)
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f, err := parseForward(c)
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forward := f[0]
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if err != nil {
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t.Errorf("Test %d: %v", i, err)
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}
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if len(forward.nextAlternateRcodes) != len(test.expected) {
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t.Errorf("Test %d: expected %d next rcodes, got %d", i, len(test.expected), len(forward.nextAlternateRcodes))
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}
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for j, rcode := range forward.nextAlternateRcodes {
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if rcode != test.expected[j] {
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t.Errorf("Test %d: expected next rcode %d, got %d", i, test.expected[j], rcode)
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}
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}
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}
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testsInvalid := []string{
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"forward . 127.0.0.1 {\nnext\n}\n",
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"forward . 127.0.0.1 {\nnext INVALID\n}\n",
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"forward . 127.0.0.1 {\nnext NXDOMAIN INVALID\n}\n",
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}
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for i, test := range testsInvalid {
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c := caddy.NewTestController("dns", test)
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_, err := parseForward(c)
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if err == nil {
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t.Errorf("Test %d: expected error, got nil", i)
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}
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}
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}
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