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package eduvpn
import (
"github.com/jwijenbergh/eduvpn-common/internal/config"
"github.com/jwijenbergh/eduvpn-common/internal/discovery"
"github.com/jwijenbergh/eduvpn-common/internal/fsm"
"github.com/jwijenbergh/eduvpn-common/internal/log"
"github.com/jwijenbergh/eduvpn-common/internal/server"
"github.com/jwijenbergh/eduvpn-common/internal/types"
)
type VPNState struct {
// The chosen server
Servers server.Servers `json:"servers"`
// The list of servers and organizations from disco
Discovery discovery.Discovery `json:"-"`
// The fsm
FSM fsm.FSM `json:"-"`
// The logger
Logger log.FileLogger `json:"-"`
// The config
Config config.Config `json:"-"`
// Whether to enable debugging
Debug bool `json:"-"`
}
func (state *VPNState) Register(name string, directory string, stateCallback func(string, string, string), debug bool) error {
errorMessage := "failed to register with the GO library"
if !state.FSM.InState(fsm.DEREGISTERED) {
return &types.WrappedErrorMessage{Message: errorMessage, Err: fsm.DeregisteredError{}.CustomError()}
}
// Initialize the logger
logLevel := log.LOG_WARNING
if debug {
logLevel = log.LOG_INFO
}
loggerErr := state.Logger.Init(logLevel, name, directory)
if loggerErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: loggerErr}
}
// Initialize the FSM
state.FSM.Init(name, stateCallback, &state.Logger, directory, debug)
state.Debug = debug
// Initialize the Config
state.Config.Init(name, directory)
// Initialize Discovery
state.Discovery.Init(&state.FSM, &state.Logger)
// Try to load the previous configuration
if state.Config.Load(&state) != nil {
// This error can be safely ignored, as when the config does not load, the struct will not be filled
state.Logger.Log(log.LOG_INFO, "Previous configuration not found")
}
state.FSM.GoTransition(fsm.NO_SERVER)
return nil
}
func (state *VPNState) Deregister() error {
// Close the log file
state.Logger.Close()
// Save the config
state.Config.Save(&state)
// Empty out the state
*state = VPNState{}
return nil
}
func (state *VPNState) CancelOAuth() error {
errorMessage := "failed to cancel OAuth"
if !state.FSM.InState(fsm.OAUTH_STARTED) {
return &types.WrappedErrorMessage{Message: errorMessage, Err: fsm.WrongStateError{Got: state.FSM.Current, Want: fsm.OAUTH_STARTED}.CustomError()}
}
currentServer, serverErr := state.Servers.GetCurrentServer()
if serverErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: serverErr}
}
server.CancelOAuth(currentServer)
return nil
}
func (state *VPNState) chooseServer(url string, isSecureInternet bool) (server.Server, error) {
// New server chosen, ensure the server is fresh
server, serverErr := state.Servers.EnsureServer(url, isSecureInternet, &state.FSM, &state.Logger)
if serverErr != nil {
return nil, &types.WrappedErrorMessage{Message: "failed to choose server", Err: serverErr}
}
// Make sure we are in the chosen state if available
state.FSM.GoTransition(fsm.CHOSEN_SERVER)
return server, nil
}
func (state *VPNState) getConfigWithOptions(url string, isSecureInternet bool, forceTCP bool) (string, string, error) {
errorMessage := "failed to get a configuration for OpenVPN/Wireguard"
if state.FSM.InState(fsm.DEREGISTERED) {
return "", "", &types.WrappedErrorMessage{Message: errorMessage, Err: fsm.DeregisteredError{}.CustomError()}
}
// Go to no server if possible, else return an error
if !state.FSM.InState(fsm.NO_SERVER) && !state.FSM.GoTransition(fsm.NO_SERVER) {
return "", "", &types.WrappedErrorMessage{Message: errorMessage, Err: fsm.WrongStateTransitionError{Got: state.FSM.Current, Want: fsm.NO_SERVER}.CustomError()}
}
// Make sure the server is chosen
chosenServer, serverErr := state.chooseServer(url, isSecureInternet)
if serverErr != nil {
return "", "", &types.WrappedErrorMessage{Message: errorMessage, Err: serverErr}
}
// Relogin with oauth
// This moves the state to authorized
if server.NeedsRelogin(chosenServer) {
loginErr := server.Login(chosenServer)
if loginErr != nil {
// We are possibly in oauth started
// So go to no server
state.FSM.GoTransition(fsm.NO_SERVER)
return "", "", &types.WrappedErrorMessage{Message: errorMessage, Err: loginErr}
}
} else { // OAuth was valid, ensure we are in the authorized state
state.FSM.GoTransition(fsm.AUTHORIZED)
}
state.FSM.GoTransition(fsm.REQUEST_CONFIG)
config, configType, configErr := server.GetConfig(chosenServer, forceTCP)
if configErr != nil {
// Go back to no server if possible
state.FSM.GoTransition(fsm.NO_SERVER)
return "", "", &types.WrappedErrorMessage{Message: errorMessage, Err: configErr}
} else {
state.FSM.GoTransition(fsm.HAS_CONFIG)
}
return config, configType, nil
}
func (state *VPNState) GetConfigInstituteAccess(url string, forceTCP bool) (string, string, error) {
return state.getConfigWithOptions(url, false, forceTCP)
}
func (state *VPNState) GetConfigSecureInternet(url string, forceTCP bool) (string, string, error) {
return state.getConfigWithOptions(url, true, forceTCP)
}
func (state *VPNState) GetDiscoOrganizations() (string, error) {
if state.FSM.InState(fsm.DEREGISTERED) {
return "", &types.WrappedErrorMessage{Message: "failed to get the organizations with Discovery", Err: fsm.DeregisteredError{}.CustomError()}
}
return state.Discovery.GetOrganizationsList()
}
func (state *VPNState) GetDiscoServers() (string, error) {
if state.FSM.InState(fsm.DEREGISTERED) {
return "", &types.WrappedErrorMessage{Message: "failed to get the servers with Discovery", Err: fsm.DeregisteredError{}.CustomError()}
}
return state.Discovery.GetServersList()
}
func (state *VPNState) SetProfileID(profileID string) error {
errorMessage := "failed to set the profile ID for the current server"
if !state.FSM.InState(fsm.ASK_PROFILE) {
return &types.WrappedErrorMessage{Message: errorMessage, Err: fsm.WrongStateError{Got: state.FSM.Current, Want: fsm.ASK_PROFILE}.CustomError()}
}
server, serverErr := state.Servers.GetCurrentServer()
if serverErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: serverErr}
}
base, baseErr := server.GetBase()
if baseErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: baseErr}
}
base.Profiles.Current = profileID
return nil
}
func (state *VPNState) SetConnected() error {
if !state.FSM.HasTransition(fsm.CONNECTED) {
return fsm.WrongStateTransitionError{Got: state.FSM.Current, Want: fsm.CONNECTED}.CustomError()
}
state.FSM.GoTransition(fsm.CONNECTED)
return nil
}
func (state *VPNState) SetDisconnected() error {
if !state.FSM.HasTransition(fsm.HAS_CONFIG) {
return fsm.WrongStateTransitionError{Got: state.FSM.Current, Want: fsm.HAS_CONFIG}.CustomError()
}
state.FSM.GoTransition(fsm.HAS_CONFIG)
return nil
}
func (state *VPNState) GetErrorTraceback(err error) string {
return types.GetErrorTraceback(err)
}
func (state *VPNState) GetErrorCause(err error) error {
return types.GetErrorCause(err)
}
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