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//go:build !js
// +build !js
package webrtc
import (
"encoding/json"
"github.com/pion/ice/v2"
"github.com/pion/webrtc/v3/pkg/rtcerr"
)
// ICEServer describes a single STUN and TURN server that can be used by
// the ICEAgent to establish a connection with a peer.
type ICEServer struct {
URLs []string `json:"urls"`
Username string `json:"username,omitempty"`
Credential interface{} `json:"credential,omitempty"`
CredentialType ICECredentialType `json:"credentialType,omitempty"`
}
func (s ICEServer) parseURL(i int) (*ice.URL, error) {
return ice.ParseURL(s.URLs[i])
}
func (s ICEServer) validate() error {
_, err := s.urls()
return err
}
func (s ICEServer) urls() ([]*ice.URL, error) {
urls := []*ice.URL{}
for i := range s.URLs {
url, err := s.parseURL(i)
if err != nil {
return nil, &rtcerr.InvalidAccessError{Err: err}
}
if url.Scheme == ice.SchemeTypeTURN || url.Scheme == ice.SchemeTypeTURNS {
// https://www.w3.org/TR/webrtc/#set-the-configuration (step #11.3.2)
if s.Username == "" || s.Credential == nil {
return nil, &rtcerr.InvalidAccessError{Err: ErrNoTurnCredentials}
}
url.Username = s.Username
switch s.CredentialType {
case ICECredentialTypePassword:
// https://www.w3.org/TR/webrtc/#set-the-configuration (step #11.3.3)
password, ok := s.Credential.(string)
if !ok {
return nil, &rtcerr.InvalidAccessError{Err: ErrTurnCredentials}
}
url.Password = password
case ICECredentialTypeOauth:
// https://www.w3.org/TR/webrtc/#set-the-configuration (step #11.3.4)
if _, ok := s.Credential.(OAuthCredential); !ok {
return nil, &rtcerr.InvalidAccessError{Err: ErrTurnCredentials}
}
default:
return nil, &rtcerr.InvalidAccessError{Err: ErrTurnCredentials}
}
}
urls = append(urls, url)
}
return urls, nil
}
func iceserverUnmarshalUrls(val interface{}) (*[]string, error) {
s, ok := val.([]interface{})
if !ok {
return nil, errInvalidICEServer
}
out := make([]string, len(s))
for idx, url := range s {
out[idx], ok = url.(string)
if !ok {
return nil, errInvalidICEServer
}
}
return &out, nil
}
func iceserverUnmarshalOauth(val interface{}) (*OAuthCredential, error) {
c, ok := val.(map[string]interface{})
if !ok {
return nil, errInvalidICEServer
}
MACKey, ok := c["MACKey"].(string)
if !ok {
return nil, errInvalidICEServer
}
AccessToken, ok := c["AccessToken"].(string)
if !ok {
return nil, errInvalidICEServer
}
return &OAuthCredential{
MACKey: MACKey,
AccessToken: AccessToken,
}, nil
}
func (s *ICEServer) iceserverUnmarshalFields(m map[string]interface{}) error {
if val, ok := m["urls"]; ok {
u, err := iceserverUnmarshalUrls(val)
if err != nil {
return err
}
s.URLs = *u
} else {
s.URLs = []string{}
}
if val, ok := m["username"]; ok {
s.Username, ok = val.(string)
if !ok {
return errInvalidICEServer
}
}
if val, ok := m["credentialType"]; ok {
ct, ok := val.(string)
if !ok {
return errInvalidICEServer
}
tpe, err := newICECredentialType(ct)
if err != nil {
return err
}
s.CredentialType = tpe
} else {
s.CredentialType = ICECredentialTypePassword
}
if val, ok := m["credential"]; ok {
switch s.CredentialType {
case ICECredentialTypePassword:
s.Credential = val
case ICECredentialTypeOauth:
c, err := iceserverUnmarshalOauth(val)
if err != nil {
return err
}
s.Credential = *c
default:
return errInvalidICECredentialTypeString
}
}
return nil
}
// UnmarshalJSON parses the JSON-encoded data and stores the result
func (s *ICEServer) UnmarshalJSON(b []byte) error {
var tmp interface{}
err := json.Unmarshal(b, &tmp)
if err != nil {
return err
}
if m, ok := tmp.(map[string]interface{}); ok {
return s.iceserverUnmarshalFields(m)
}
return errInvalidICEServer
}
// MarshalJSON returns the JSON encoding
func (s ICEServer) MarshalJSON() ([]byte, error) {
m := make(map[string]interface{})
m["urls"] = s.URLs
if s.Username != "" {
m["username"] = s.Username
}
if s.Credential != nil {
m["credential"] = s.Credential
}
m["credentialType"] = s.CredentialType
return json.Marshal(m)
}
|
