commit 4acc08cc60d46ba1ffce9b4492b974eff385e46b Author: Cecylia Bocovich cohosh@torproject.org Date: Fri Aug 13 10:23:46 2021 -0400

Use a config struct for snowflake client options --- client/lib/snowflake.go | 20 ++++++++++++++------ client/snowflake.go | 11 +++++++++-- 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/client/lib/snowflake.go b/client/lib/snowflake.go index 1987cbc..8b01d88 100644 --- a/client/lib/snowflake.go +++ b/client/lib/snowflake.go @@ -37,17 +37,25 @@ type Transport struct { dialer *WebRTCDialer }

+type ClientConfig struct { + BrokerURL string + AmpCacheURL string + FrontDomain string + ICEAddresses []string + KeepLocalAddresses bool + Max int +} + // Create a new Snowflake transport client that can spawn multiple Snowflake connections. // brokerURL and frontDomain are the urls for the broker host and domain fronting host // iceAddresses are the STUN/TURN urls needed for WebRTC negotiation // keepLocalAddresses is a flag to enable sending local network addresses (for testing purposes) // max is the maximum number of snowflakes the client should gather for each SOCKS connection -func NewSnowflakeClient(brokerURL, ampCacheURL, frontDomain string, - iceAddresses []string, keepLocalAddresses bool, max int) (*Transport, error) { +func NewSnowflakeClient(config ClientConfig) (*Transport, error) {

log.Println("\n\n\n --- Starting Snowflake Client ---")

- iceServers := parseIceServers(iceAddresses) + iceServers := parseIceServers(config.ICEAddresses) // chooses a random subset of servers from inputs rand.Seed(time.Now().UnixNano()) rand.Shuffle(len(iceServers), func(i, j int) { @@ -63,14 +71,14 @@ func NewSnowflakeClient(brokerURL, ampCacheURL, frontDomain string,

// Rendezvous with broker using the given parameters. broker, err := NewBrokerChannel( - brokerURL, ampCacheURL, frontDomain, CreateBrokerTransport(), - keepLocalAddresses) + config.BrokerURL, config.AmpCacheURL, config.FrontDomain, CreateBrokerTransport(), + config.KeepLocalAddresses) if err != nil { return nil, err } go updateNATType(iceServers, broker)

- transport := &Transport{dialer: NewWebRTCDialer(broker, iceServers, max)} + transport := &Transport{dialer: NewWebRTCDialer(broker, iceServers, config.Max)}

return transport, nil } diff --git a/client/snowflake.go b/client/snowflake.go index ef06a2d..04ebf48 100644 --- a/client/snowflake.go +++ b/client/snowflake.go @@ -141,8 +141,15 @@ func main() {

iceAddresses := strings.Split(strings.TrimSpace(*iceServersCommas), ",")

- transport, err := sf.NewSnowflakeClient(*brokerURL, *ampCacheURL, *frontDomain, iceAddresses, - *keepLocalAddresses || *oldKeepLocalAddresses, *max) + config := sf.ClientConfig{ + BrokerURL: *brokerURL, + AmpCacheURL: *ampCacheURL, + FrontDomain: *frontDomain, + ICEAddresses: iceAddresses, + KeepLocalAddresses: *keepLocalAddresses || *oldKeepLocalAddresses, + Max: *max, + } + transport, err := sf.NewSnowflakeClient(config) if err != nil { log.Fatal("Failed to start snowflake transport: ", err) }