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package eduvpn
import (
"encoding/json"
"errors"
)
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"`
}
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) Initialize(url string) error {
if !GetVPNState().HasTransition(CHOSEN_SERVER) {
return errors.New("cannot choose a server")
}
server.BaseURL = url
endpointsErr := server.GetEndpoints()
if endpointsErr != nil {
return endpointsErr
}
GetVPNState().GoTransition(CHOSEN_SERVER, "Chosen server")
return nil
}
func (server *Server) NeedsRelogin() bool {
// Server has no oauth tokens
if server.OAuth == nil || server.OAuth.Token == nil {
return true
}
// Server has oauth tokens, check if they need a 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) getProfileForID(profile_id string) (*ServerProfile, error) {
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(profile_id string) (string, error) {
if !GetVPNState().HasTransition(HAS_CONFIG) {
return "", errors.New("cannot get a config with a profile, invalid state")
}
profile, profileErr := server.getProfileForID(profile_id)
if profileErr != nil {
return "", profileErr
}
if profile.supportsWireguard() {
return server.WireguardGetConfig(profile_id)
}
return server.OpenVPNGetConfig(profile_id)
}
func (server *Server) askForProfileID() (string, error) {
if !GetVPNState().HasTransition(ASK_PROFILE) {
return "", errors.New("cannot ask for a profile id, invalid state")
}
_, profile_id := GetVPNState().GoTransition(ASK_PROFILE, server.ProfilesRaw)
return profile_id, nil
}
func (server *Server) GetConfig() (string, error) {
if !GetVPNState().InState(REQUEST_CONFIG) {
return "", errors.New("cannot get a config, invalid state")
}
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 {
return server.getConfigWithProfile(server.Profiles.Info.ProfileList[0].ID)
}
profile_id, profileErr := server.askForProfileID()
if profileErr != nil {
return "", nil
}
return server.getConfigWithProfile(profile_id)
}
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