mirror of
https://github.com/netbirdio/netbird.git
synced 2026-04-30 22:26:42 +00:00
98 lines
2.3 KiB
Go
98 lines
2.3 KiB
Go
package ws
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"errors"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"strings"
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"github.com/coder/websocket"
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log "github.com/sirupsen/logrus"
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nbnet "github.com/netbirdio/netbird/client/net"
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"github.com/netbirdio/netbird/shared/relay"
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"github.com/netbirdio/netbird/util/embeddedroots"
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)
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type Dialer struct {
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}
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func (d Dialer) Protocol() string {
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return "WS"
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}
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func (d Dialer) Dial(ctx context.Context, address, serverName string) (net.Conn, error) {
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wsURL, err := prepareURL(address)
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if err != nil {
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return nil, err
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}
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var underlying net.Conn
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opts := createDialOptions(serverName, &underlying)
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parsedURL, err := url.Parse(wsURL)
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if err != nil {
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return nil, err
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}
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parsedURL.Path = relay.WebSocketURLPath
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wsConn, resp, err := websocket.Dial(ctx, parsedURL.String(), opts)
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if err != nil {
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if errors.Is(err, context.Canceled) {
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return nil, err
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}
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log.Errorf("failed to dial to Relay server '%s': %s", wsURL, err)
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return nil, err
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}
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if resp.Body != nil {
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_ = resp.Body.Close()
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}
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conn := NewConn(wsConn, address, underlying)
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return conn, nil
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}
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func prepareURL(address string) (string, error) {
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if !strings.HasPrefix(address, "rel:") && !strings.HasPrefix(address, "rels:") {
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return "", fmt.Errorf("unsupported scheme: %s", address)
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}
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return strings.Replace(address, "rel", "ws", 1), nil
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}
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// httpClientNbDialer builds the http client used by the websocket library.
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// underlyingOut, when non-nil, is populated with the raw conn from the
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// transport's DialContext so the caller can read its RemoteAddr.
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func httpClientNbDialer(serverName string, underlyingOut *net.Conn) *http.Client {
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customDialer := nbnet.NewDialer()
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certPool, err := x509.SystemCertPool()
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if err != nil || certPool == nil {
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log.Debugf("System cert pool not available; falling back to embedded cert, error: %v", err)
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certPool = embeddedroots.Get()
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}
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customTransport := &http.Transport{
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DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
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c, err := customDialer.DialContext(ctx, network, addr)
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if err == nil && underlyingOut != nil {
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*underlyingOut = c
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}
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return c, err
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},
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TLSClientConfig: &tls.Config{
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RootCAs: certPool,
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ServerName: serverName,
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},
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}
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return &http.Client{
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Transport: customTransport,
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}
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}
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