commit 36b58407a8d8376df2adc6c371d74c09e2b0a417 Author: David Fifield david@bamsoftware.com Date: Sat Feb 2 00:04:25 2019 -0700

Have NewUTLSRoundTripper take a *utls.Config.

Plan to use this for testing. --- meek-client/meek-client.go | 2 +- meek-client/utls.go | 25 +++++++++++++++++++------ 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/meek-client/meek-client.go b/meek-client/meek-client.go index 11c26d2..462eeb3 100644 --- a/meek-client/meek-client.go +++ b/meek-client/meek-client.go @@ -323,7 +323,7 @@ func handler(conn *pt.SocksConn) error { } info.RoundTripper = helperRoundTripper } else if utlsOK { - info.RoundTripper, err = NewUTLSRoundTripper(utlsName) + info.RoundTripper, err = NewUTLSRoundTripper(utlsName, nil) if err != nil { return err } diff --git a/meek-client/utls.go b/meek-client/utls.go index 832b3d6..bb288f7 100644 --- a/meek-client/utls.go +++ b/meek-client/utls.go @@ -94,7 +94,12 @@ func dialUTLS(network, addr string, cfg *utls.Config, clientHelloID *utls.Client if err != nil { return nil, err } + serverName, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } uconn := utls.UClient(conn, cfg, *clientHelloID) + uconn.SetSNI(serverName) err = uconn.Handshake() if err != nil { return nil, err @@ -110,6 +115,7 @@ type UTLSRoundTripper struct { sync.Mutex

clientHelloID *utls.ClientHelloID + config *utls.Config rt http.RoundTripper }

@@ -130,7 +136,7 @@ func (rt *UTLSRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) // On the first call, make an http.Transport or http2.Transport // as appropriate. var err error - rt.rt, err = makeRoundTripper(req, rt.clientHelloID) + rt.rt, err = makeRoundTripper(req, rt.clientHelloID, rt.config) if err != nil { return nil, err } @@ -139,13 +145,19 @@ func (rt *UTLSRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) return rt.rt.RoundTrip(req) }

-func makeRoundTripper(req *http.Request, clientHelloID *utls.ClientHelloID) (http.RoundTripper, error) { +func makeRoundTripper(req *http.Request, clientHelloID *utls.ClientHelloID, cfg *utls.Config) (http.RoundTripper, error) { addr, err := addrForDial(req.URL) if err != nil { return nil, err } - cfg := &utls.Config{ServerName: req.URL.Hostname()} - bootstrapConn, err := dialUTLS("tcp", addr, cfg, clientHelloID) + + // Connect to the given address and initiate a TLS handshake using + // the given ClientHelloID. Return the resulting connection. + dial := func(network, addr string) (*utls.UConn, error) { + return dialUTLS(network, addr, cfg, clientHelloID) + } + + bootstrapConn, err := dial("tcp", addr) if err != nil { return nil, err } @@ -169,7 +181,7 @@ func makeRoundTripper(req *http.Request, clientHelloID *utls.ClientHelloID) (htt }

// Later dials make a new connection. - uconn, err := dialUTLS(network, addr, cfg, clientHelloID) + uconn, err := dial(network, addr) if err != nil { return nil, err } @@ -225,7 +237,7 @@ var clientHelloIDMap = map[string]*utls.ClientHelloID{ "helloios_11_1": &utls.HelloIOS_11_1, }

-func NewUTLSRoundTripper(name string) (http.RoundTripper, error) { +func NewUTLSRoundTripper(name string, cfg *utls.Config) (http.RoundTripper, error) { // Lookup is case-insensitive. clientHelloID, ok := clientHelloIDMap[strings.ToLower(name)] if !ok { @@ -237,5 +249,6 @@ func NewUTLSRoundTripper(name string) (http.RoundTripper, error) { } return &UTLSRoundTripper{ clientHelloID: clientHelloID, + config: cfg, }, nil }