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|
package internal
import (
"encoding/json"
"errors"
"fmt"
)
type Server struct {
BaseURL string `json:"base_url"`
Endpoints ServerEndpoints `json:"endpoints"`
OAuth OAuth `json:"oauth"`
Profiles ServerProfileInfo `json:"profiles"`
ProfilesRaw string `json:"profiles_raw"`
Logger *FileLogger `json:"-"`
FSM *FSM `json:"-"`
}
type Servers struct {
List map[string]*Server `json:"list"`
Current string `json:"current"`
}
func (servers *Servers) GetCurrentServer() (*Server, error) {
if servers.List == nil {
return nil, errors.New("No map found to get Current Server")
}
server, exists := servers.List[servers.Current]
if !exists || server == nil {
return nil, errors.New("Current Server not found")
}
return server, nil
}
func (server *Server) Init(url string, fsm *FSM, logger *FileLogger) error {
server.BaseURL = url
server.FSM = fsm
server.Logger = logger
server.OAuth.Init(fsm, logger)
endpointsErr := server.GetEndpoints()
if endpointsErr != nil {
return endpointsErr
}
return nil
}
func (server *Server) EnsureTokens() error {
if server.OAuth.NeedsRelogin() {
server.Logger.Log(LOG_INFO, "OAuth: Tokens are invalid, relogging in")
return server.Login()
}
return nil
}
func (servers *Servers) EnsureServer(url string, fsm *FSM, logger *FileLogger) *Server {
if servers.List == nil {
servers.List = make(map[string]*Server)
}
server, exists := servers.List[url]
if !exists || server == nil {
server = &Server{}
}
server.Init(url, fsm, logger)
servers.List[url] = server
servers.Current = url
return server
}
type ServerProfile struct {
ID string `json:"profile_id"`
DisplayName string `json:"display_name"`
VPNProtoList []string `json:"vpn_proto_list"`
DefaultGateway bool `json:"default_gateway"`
}
type ServerProfileInfo struct {
Current string `json:"current_profile"`
Info struct {
ProfileList []ServerProfile `json:"profile_list"`
} `json:"info"`
}
type ServerEndpointList struct {
API string `json:"api_endpoint"`
Authorization string `json:"authorization_endpoint"`
Token string `json:"token_endpoint"`
}
// Struct that defines the json format for /.well-known/vpn-user-portal"
type ServerEndpoints struct {
API struct {
V2 ServerEndpointList `json:"http://eduvpn.org/api#2"`
V3 ServerEndpointList `json:"http://eduvpn.org/api#3"`
} `json:"api"`
V string `json:"v"`
}
func (server *Server) Login() error {
return server.OAuth.Login("org.eduvpn.app.linux", server.Endpoints.API.V3.Authorization, server.Endpoints.API.V3.Token)
}
func (server *Server) NeedsRelogin() bool {
// Check if OAuth needs relogin
return server.OAuth.NeedsRelogin()
}
func (server *Server) GetEndpoints() error {
url := server.BaseURL + "/.well-known/vpn-user-portal"
_, body, bodyErr := HTTPGet(url)
if bodyErr != nil {
return bodyErr
}
endpoints := ServerEndpoints{}
jsonErr := json.Unmarshal(body, &endpoints)
if jsonErr != nil {
return jsonErr
}
server.Endpoints = endpoints
return nil
}
func (profile *ServerProfile) supportsWireguard() bool {
for _, proto := range profile.VPNProtoList {
if proto == "wireguard" {
return true
}
}
return false
}
func (server *Server) getCurrentProfile() (*ServerProfile, error) {
profile_id := server.Profiles.Current
for _, profile := range server.Profiles.Info.ProfileList {
if profile.ID == profile_id {
return &profile, nil
}
}
return nil, errors.New("no profile found for id")
}
func (server *Server) getConfigWithProfile() (string, error) {
if !server.FSM.HasTransition(HAS_CONFIG) {
return "", errors.New("cannot get a config with a profile, invalid state")
}
profile, profileErr := server.getCurrentProfile()
if profileErr != nil {
return "", profileErr
}
if profile.supportsWireguard() {
return server.WireguardGetConfig()
}
return server.OpenVPNGetConfig()
}
func (server *Server) askForProfileID() error {
if !server.FSM.HasTransition(ASK_PROFILE) {
return errors.New("cannot ask for a profile id, invalid state")
}
server.FSM.GoTransitionWithData(ASK_PROFILE, server.ProfilesRaw)
return nil
}
func (server *Server) GetConfig() (string, error) {
if !server.FSM.InState(REQUEST_CONFIG) {
return "", errors.New(fmt.Sprintf("cannot get a config, invalid state %s", server.FSM.Current.String()))
}
infoErr := server.APIInfo()
if infoErr != nil {
return "", infoErr
}
// Set the current profile if there is only one profile
if len(server.Profiles.Info.ProfileList) == 1 {
server.Profiles.Current = server.Profiles.Info.ProfileList[0].ID
return server.getConfigWithProfile()
}
profileErr := server.askForProfileID()
if profileErr != nil {
return "", nil
}
return server.getConfigWithProfile()
}
|
