2019-06-10 09:33:19 +01:00
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package home
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2018-08-30 15:25:33 +01:00
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import (
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"encoding/json"
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"fmt"
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2020-02-13 15:42:07 +00:00
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"net"
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2018-08-30 15:25:33 +01:00
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"net/http"
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2020-02-13 15:42:07 +00:00
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"net/url"
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2020-11-16 16:01:12 +00:00
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"runtime"
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2020-02-13 15:42:07 +00:00
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"strings"
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2021-12-16 17:54:59 +00:00
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"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
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2021-03-22 13:46:36 +00:00
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"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
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2020-10-30 10:32:02 +00:00
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"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
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2021-01-13 13:18:51 +00:00
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"github.com/AdguardTeam/AdGuardHome/internal/version"
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2019-02-27 15:28:09 +00:00
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"github.com/AdguardTeam/golibs/log"
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2021-08-09 14:03:37 +01:00
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"github.com/AdguardTeam/golibs/netutil"
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2019-04-15 14:21:12 +01:00
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"github.com/NYTimes/gziphandler"
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2018-08-30 15:25:33 +01:00
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)
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2021-03-24 11:52:37 +00:00
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// appendDNSAddrs is a convenient helper for appending a formatted form of DNS
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// addresses to a slice of strings.
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func appendDNSAddrs(dst []string, addrs ...net.IP) (res []string) {
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for _, addr := range addrs {
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2021-06-01 19:06:55 +01:00
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var hostport string
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2021-09-17 16:31:07 +01:00
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if config.DNS.Port != defaultPortDNS {
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2021-08-09 14:03:37 +01:00
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hostport = netutil.JoinHostPort(addr.String(), config.DNS.Port)
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2021-06-01 19:06:55 +01:00
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} else {
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hostport = addr.String()
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2021-03-24 11:52:37 +00:00
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}
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dst = append(dst, hostport)
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}
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return dst
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}
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// appendDNSAddrsWithIfaces formats and appends all DNS addresses from src to
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// dst. It also adds the IP addresses of all network interfaces if src contains
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2021-12-27 16:40:39 +00:00
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// an unspecified IP address.
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2021-03-24 11:52:37 +00:00
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func appendDNSAddrsWithIfaces(dst []string, src []net.IP) (res []string, err error) {
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ifacesAdded := false
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for _, h := range src {
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if !h.IsUnspecified() {
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dst = appendDNSAddrs(dst, h)
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continue
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} else if ifacesAdded {
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continue
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}
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// Add addresses of all network interfaces for addresses like
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// "0.0.0.0" and "::".
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var ifaces []*aghnet.NetInterface
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ifaces, err = aghnet.GetValidNetInterfacesForWeb()
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if err != nil {
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return nil, fmt.Errorf("cannot get network interfaces: %w", err)
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}
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for _, iface := range ifaces {
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dst = appendDNSAddrs(dst, iface.Addresses...)
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}
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ifacesAdded = true
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}
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return dst, nil
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}
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// collectDNSAddresses returns the list of DNS addresses the server is listening
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// on, including the addresses on all interfaces in cases of unspecified IPs.
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func collectDNSAddresses() (addrs []string, err error) {
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if hosts := config.DNS.BindHosts; len(hosts) == 0 {
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addrs = appendDNSAddrs(addrs, net.IP{127, 0, 0, 1})
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} else {
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addrs, err = appendDNSAddrsWithIfaces(addrs, hosts)
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if err != nil {
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return nil, fmt.Errorf("collecting dns addresses: %w", err)
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}
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2019-07-02 10:19:36 +01:00
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}
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2021-03-24 11:52:37 +00:00
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de := getDNSEncryption()
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if de.https != "" {
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addrs = append(addrs, de.https)
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}
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if de.tls != "" {
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addrs = append(addrs, de.tls)
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}
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if de.quic != "" {
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addrs = append(addrs, de.quic)
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}
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return addrs, nil
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2019-07-02 10:19:36 +01:00
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}
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2019-03-19 11:14:58 +00:00
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2021-01-21 16:55:41 +00:00
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// statusResponse is a response for /control/status endpoint.
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type statusResponse struct {
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DNSAddrs []string `json:"dns_addresses"`
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DNSPort int `json:"dns_port"`
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HTTPPort int `json:"http_port"`
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IsProtectionEnabled bool `json:"protection_enabled"`
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// TODO(e.burkov): Inspect if front-end doesn't requires this field as
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// openapi.yaml declares.
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IsDHCPAvailable bool `json:"dhcp_available"`
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IsRunning bool `json:"running"`
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Version string `json:"version"`
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Language string `json:"language"`
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}
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2021-12-16 17:54:59 +00:00
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func handleStatus(w http.ResponseWriter, r *http.Request) {
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2021-03-24 11:52:37 +00:00
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dnsAddrs, err := collectDNSAddresses()
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if err != nil {
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// Don't add a lot of formatting, since the error is already
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// wrapped by collectDNSAddresses.
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2021-12-16 17:54:59 +00:00
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aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
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2021-03-24 11:52:37 +00:00
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return
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}
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2021-05-17 14:50:02 +01:00
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var resp statusResponse
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func() {
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config.RLock()
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defer config.RUnlock()
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resp = statusResponse{
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DNSAddrs: dnsAddrs,
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DNSPort: config.DNS.Port,
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HTTPPort: config.BindPort,
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IsRunning: isRunning(),
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Version: version.Version(),
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Language: config.Language,
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}
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}()
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2020-11-16 16:01:12 +00:00
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2021-01-21 16:55:41 +00:00
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var c *dnsforward.FilteringConfig
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if Context.dnsServer != nil {
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c = &dnsforward.FilteringConfig{}
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Context.dnsServer.WriteDiskConfig(c)
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resp.IsProtectionEnabled = c.ProtectionEnabled
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2018-08-30 15:25:33 +01:00
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}
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2020-11-16 16:01:12 +00:00
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2021-01-21 16:55:41 +00:00
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// IsDHCPAvailable field is now false by default for Windows.
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if runtime.GOOS != "windows" {
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resp.IsDHCPAvailable = Context.dhcpServer != nil
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2020-11-16 16:01:12 +00:00
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}
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2018-08-30 15:25:33 +01:00
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w.Header().Set("Content-Type", "application/json")
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2021-03-24 11:52:37 +00:00
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err = json.NewEncoder(w).Encode(resp)
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2018-08-30 15:25:33 +01:00
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if err != nil {
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2021-12-16 17:54:59 +00:00
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aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
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2021-03-24 11:52:37 +00:00
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2018-08-30 15:25:33 +01:00
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return
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}
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}
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2019-10-21 15:44:07 +01:00
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type profileJSON struct {
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Name string `json:"name"`
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}
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func handleGetProfile(w http.ResponseWriter, r *http.Request) {
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pj := profileJSON{}
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2020-12-22 18:09:53 +00:00
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u := Context.auth.getCurrentUser(r)
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2019-10-21 15:44:07 +01:00
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pj.Name = u.Name
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data, err := json.Marshal(pj)
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if err != nil {
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2021-12-16 17:54:59 +00:00
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aghhttp.Error(r, w, http.StatusInternalServerError, "json.Marshal: %s", err)
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2019-10-21 15:44:07 +01:00
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return
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}
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_, _ = w.Write(data)
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}
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2019-02-12 17:02:52 +00:00
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// ------------------------
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// registration of handlers
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// ------------------------
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2018-08-30 15:25:33 +01:00
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func registerControlHandlers() {
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2019-08-21 12:39:37 +01:00
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httpRegister(http.MethodGet, "/control/status", handleStatus)
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httpRegister(http.MethodPost, "/control/i18n/change_language", handleI18nChangeLanguage)
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httpRegister(http.MethodGet, "/control/i18n/current_language", handleI18nCurrentLanguage)
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2020-11-25 12:50:59 +00:00
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Context.mux.HandleFunc("/control/version.json", postInstall(optionalAuth(handleGetVersionJSON)))
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2019-08-21 12:39:37 +01:00
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httpRegister(http.MethodPost, "/control/update", handleUpdate)
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2020-10-08 09:34:36 +01:00
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httpRegister(http.MethodGet, "/control/profile", handleGetProfile)
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2019-08-21 12:39:37 +01:00
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2021-06-18 16:13:36 +01:00
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// No auth is necessary for DoH/DoT configurations
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Context.mux.HandleFunc("/apple/doh.mobileconfig", postInstall(handleMobileConfigDoH))
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Context.mux.HandleFunc("/apple/dot.mobileconfig", postInstall(handleMobileConfigDoT))
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2019-08-29 10:34:07 +01:00
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RegisterAuthHandlers()
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2018-08-30 15:25:33 +01:00
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}
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2019-08-21 12:39:37 +01:00
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2020-12-07 13:04:53 +00:00
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func httpRegister(method, url string, handler func(http.ResponseWriter, *http.Request)) {
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2021-01-13 13:18:51 +00:00
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if method == "" {
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2020-02-27 08:48:59 +00:00
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// "/dns-query" handler doesn't need auth, gzip and isn't restricted by 1 HTTP method
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2020-11-25 12:50:59 +00:00
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Context.mux.HandleFunc(url, postInstall(handler))
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2020-02-27 08:48:59 +00:00
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return
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}
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2020-11-25 12:50:59 +00:00
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Context.mux.Handle(url, postInstallHandler(optionalAuthHandler(gziphandler.GzipHandler(ensureHandler(method, handler)))))
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2019-08-21 12:39:37 +01:00
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}
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2020-02-13 15:42:07 +00:00
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// ----------------------------------
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// helper functions for HTTP handlers
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// ----------------------------------
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func ensure(method string, handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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log.Debug("%s %v", r.Method, r.URL)
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if r.Method != method {
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http.Error(w, "This request must be "+method, http.StatusMethodNotAllowed)
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return
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}
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2021-01-13 14:26:57 +00:00
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if method == http.MethodPost || method == http.MethodPut || method == http.MethodDelete {
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2020-02-13 15:42:07 +00:00
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Context.controlLock.Lock()
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defer Context.controlLock.Unlock()
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}
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handler(w, r)
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}
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}
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func ensurePOST(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
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2021-01-13 14:26:57 +00:00
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return ensure(http.MethodPost, handler)
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2020-02-13 15:42:07 +00:00
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}
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func ensureGET(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
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2021-01-13 14:26:57 +00:00
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return ensure(http.MethodGet, handler)
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2020-02-13 15:42:07 +00:00
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}
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// Bridge between http.Handler object and Go function
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type httpHandler struct {
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handler func(http.ResponseWriter, *http.Request)
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}
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func (h *httpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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h.handler(w, r)
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}
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func ensureHandler(method string, handler func(http.ResponseWriter, *http.Request)) http.Handler {
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h := httpHandler{}
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h.handler = ensure(method, handler)
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return &h
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}
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// preInstall lets the handler run only if firstRun is true, no redirects
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func preInstall(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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if !Context.firstRun {
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// if it's not first run, don't let users access it (for example /install.html when configuration is done)
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http.Error(w, http.StatusText(http.StatusForbidden), http.StatusForbidden)
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return
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}
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handler(w, r)
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}
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}
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// preInstallStruct wraps preInstall into a struct that can be returned as an interface where necessary
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type preInstallHandlerStruct struct {
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handler http.Handler
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}
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func (p *preInstallHandlerStruct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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preInstall(p.handler.ServeHTTP)(w, r)
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}
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// preInstallHandler returns http.Handler interface for preInstall wrapper
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func preInstallHandler(handler http.Handler) http.Handler {
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return &preInstallHandlerStruct{handler}
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}
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2021-02-05 11:11:53 +00:00
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// handleHTTPSRedirect redirects the request to HTTPS, if needed. If ok is
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// true, the middleware must continue handling the request.
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func handleHTTPSRedirect(w http.ResponseWriter, r *http.Request) (ok bool) {
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web := Context.web
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if web.httpsServer.server == nil {
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return true
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}
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2021-08-09 14:03:37 +01:00
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host, err := netutil.SplitHost(r.Host)
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2021-02-05 11:11:53 +00:00
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if err != nil {
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2021-12-16 17:54:59 +00:00
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aghhttp.Error(r, w, http.StatusBadRequest, "bad host: %s", err)
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2021-02-05 11:11:53 +00:00
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2021-03-22 13:46:36 +00:00
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return false
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2021-02-05 11:11:53 +00:00
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}
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if r.TLS == nil && web.forceHTTPS {
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hostPort := host
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2021-09-17 16:31:07 +01:00
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if port := web.conf.PortHTTPS; port != defaultPortHTTPS {
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2021-08-09 14:03:37 +01:00
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hostPort = netutil.JoinHostPort(host, port)
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2021-02-05 11:11:53 +00:00
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}
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httpsURL := &url.URL{
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2021-03-15 11:19:04 +00:00
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Scheme: schemeHTTPS,
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2021-02-05 11:11:53 +00:00
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Host: hostPort,
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Path: r.URL.Path,
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RawQuery: r.URL.RawQuery,
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}
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http.Redirect(w, r, httpsURL.String(), http.StatusTemporaryRedirect)
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return false
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}
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// Allow the frontend from the HTTP origin to send requests to the HTTPS
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// server. This can happen when the user has just set up HTTPS with
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2021-02-11 15:40:14 +00:00
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// redirects. Prevent cache-related errors by setting the Vary header.
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//
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin.
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2021-02-05 11:11:53 +00:00
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originURL := &url.URL{
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2021-03-15 11:19:04 +00:00
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Scheme: schemeHTTP,
|
2021-02-05 11:11:53 +00:00
|
|
|
Host: r.Host,
|
|
|
|
}
|
|
|
|
w.Header().Set("Access-Control-Allow-Origin", originURL.String())
|
2021-02-11 15:40:14 +00:00
|
|
|
w.Header().Set("Vary", "Origin")
|
2021-02-05 11:11:53 +00:00
|
|
|
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
|
|
|
|
// postInstall lets the handler to run only if firstRun is false. Otherwise, it
|
|
|
|
// redirects to /install.html. It also enforces HTTPS if it is enabled and
|
|
|
|
// configured and sets appropriate access control headers.
|
2020-02-13 15:42:07 +00:00
|
|
|
func postInstall(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
|
|
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
2021-02-05 11:11:53 +00:00
|
|
|
path := r.URL.Path
|
|
|
|
if Context.firstRun && !strings.HasPrefix(path, "/install.") &&
|
|
|
|
!strings.HasPrefix(path, "/assets/") {
|
2020-02-18 16:27:09 +00:00
|
|
|
http.Redirect(w, r, "/install.html", http.StatusFound)
|
2021-02-05 11:11:53 +00:00
|
|
|
|
2020-02-13 15:42:07 +00:00
|
|
|
return
|
|
|
|
}
|
2020-02-18 16:27:09 +00:00
|
|
|
|
2021-02-05 11:11:53 +00:00
|
|
|
if !handleHTTPSRedirect(w, r) {
|
2020-02-13 15:42:07 +00:00
|
|
|
return
|
|
|
|
}
|
2020-02-18 16:27:09 +00:00
|
|
|
|
2020-02-13 15:42:07 +00:00
|
|
|
handler(w, r)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
type postInstallHandlerStruct struct {
|
|
|
|
handler http.Handler
|
|
|
|
}
|
|
|
|
|
|
|
|
func (p *postInstallHandlerStruct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
|
|
postInstall(p.handler.ServeHTTP)(w, r)
|
|
|
|
}
|
|
|
|
|
|
|
|
func postInstallHandler(handler http.Handler) http.Handler {
|
|
|
|
return &postInstallHandlerStruct{handler}
|
|
|
|
}
|