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package backend
import (
"encoding/json"
"fmt"
"log"
"net/http"
"os"
"strconv"
"time"
"0xacab.org/leap/bitmask-vpn/pkg/bitmask"
)
func CheckAuth(handler http.HandlerFunc, token string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
t := r.Header.Get("X-Auth-Token")
if t == token {
handler(w, r)
} else {
w.WriteHeader(http.StatusUnauthorized)
w.Write([]byte("401 - Unauthorized"))
}
}
}
func webOn(w http.ResponseWriter, r *http.Request) {
log.Println("Web UI: on")
SwitchOn()
}
func webOff(w http.ResponseWriter, r *http.Request) {
log.Println("Web UI: off")
SwitchOff()
}
func webStatus(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, ctx.Status.String())
}
func webGatewayGet(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, ctx.bm.GetCurrentGateway())
}
func webGatewaySet(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "POST":
if err := r.ParseForm(); err != nil {
fmt.Fprintf(w, "ParseForm() err: %v", err)
return
}
gwLabel := r.FormValue("transport")
fmt.Fprintf(w, "selected gateway: %s\n", gwLabel)
ctx.bm.UseGateway(gwLabel)
// TODO make sure we don't tear the fw down on reconnect...
SwitchOff()
// a little sleep is needed, though, because iptables takes some time
time.Sleep(500 * time.Millisecond)
SwitchOn()
default:
fmt.Fprintf(w, "Only POST supported.")
}
}
func webGatewayList(w http.ResponseWriter, r *http.Request) {
transport := ctx.bm.GetTransport()
locationJson, err := json.Marshal(ctx.bm.ListLocationFullness(transport))
if err != nil {
fmt.Fprintf(w, "Error converting json: %v", err)
}
fmt.Fprintf(w, string(locationJson))
}
func webTransportGet(w http.ResponseWriter, r *http.Request) {
t, err := json.Marshal(ctx.bm.GetTransport())
if err != nil {
fmt.Fprintf(w, "Error converting json: %v", err)
}
fmt.Fprintf(w, string(t))
}
func webTransportSet(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "POST":
if err := r.ParseForm(); err != nil {
fmt.Fprintf(w, "ParseForm() err: %v", err)
return
}
t := r.FormValue("transport")
if isValidTransport(t) {
fmt.Fprintf(w, "Selected transport: %s\n", t)
go ctx.bm.SetTransport(string(t))
} else {
fmt.Fprintf(w, "Unknown transport: %s\n", t)
}
default:
fmt.Fprintf(w, "Only POST supported.")
}
}
func webTransportList(w http.ResponseWriter, r *http.Request) {
t, err := json.Marshal([]string{"openvpn", "obfs4"})
if err != nil {
fmt.Fprintf(w, "Error converting json: %v", err)
}
fmt.Fprintf(w, string(t))
}
func webQuit(w http.ResponseWriter, r *http.Request) {
log.Println("Web UI: quit")
Quit()
os.Exit(0)
}
func enableWebAPI(port int) {
log.Println("Starting WebAPI in port", port)
bitmask.GenerateAuthToken()
token := bitmask.ReadAuthToken()
http.Handle("/vpn/start", CheckAuth(http.HandlerFunc(webOn), token))
http.Handle("/vpn/stop", CheckAuth(http.HandlerFunc(webOff), token))
http.Handle("/vpn/gw/get", CheckAuth(http.HandlerFunc(webGatewayGet), token))
http.Handle("/vpn/gw/set", CheckAuth(http.HandlerFunc(webGatewaySet), token))
http.Handle("/vpn/gw/list", CheckAuth(http.HandlerFunc(webGatewayList), token))
http.Handle("/vpn/transport/get", CheckAuth(http.HandlerFunc(webTransportGet), token))
http.Handle("/vpn/transport/set", CheckAuth(http.HandlerFunc(webTransportSet), token))
http.Handle("/vpn/transport/list", CheckAuth(http.HandlerFunc(webTransportList), token))
http.Handle("/vpn/status", CheckAuth(http.HandlerFunc(webStatus), token))
http.Handle("/vpn/quit", CheckAuth(http.HandlerFunc(webQuit), token))
http.ListenAndServe(":"+strconv.Itoa(port), nil)
}
func isValidTransport(t string) bool {
for _, b := range []string{"openvpn", "obfs4"} {
if b == t {
return true
}
}
return false
}
|
