// NewHost starts a new Host that will listen on the network for incoming
// messages. It will store the private-key.
func NewHost(e *network.ServerIdentity, pkey abstract.Scalar) *Host {
h := &Host{
ServerIdentity: e,
workingAddress: e.First(),
connections: make(map[network.ServerIdentityID]network.SecureConn),
pendingTreeMarshal: make(map[RosterID][]*TreeMarshal),
pendingSDAs: make([]*ProtocolMsg, 0),
host: network.NewSecureTCPHost(pkey, e),
private: pkey,
suite: network.Suite,
networkChan: make(chan network.Packet, 1),
isClosing: false,
ProcessMessagesQuit: make(chan bool),
}
h.overlay = NewOverlay(h)
h.serviceStore = newServiceStore(h, h.overlay)
return h
}
func TestServiceBackForthProtocol(t *testing.T) {
local := sda.NewLocalTest()
defer local.CloseAll()
// register service
sda.RegisterNewService("BackForth", func(c *sda.Context, path string) sda.Service {
return &simpleService{
ctx: c,
}
})
// create hosts
hosts, el, _ := local.GenTree(4, true, true, false)
// create client
priv, pub := sda.PrivPub()
client := network.NewSecureTCPHost(priv, network.NewServerIdentity(pub, ""))
c, err := client.Open(hosts[0].ServerIdentity)
assert.Nil(t, err)
// create request
r := &simpleRequest{
ServerIdentities: el,
Val: 10,
}
buff, err := network.MarshalRegisteredType(r)
assert.Nil(t, err)
req := &sda.ClientRequest{
Service: sda.ServiceFactory.ServiceID("BackForth"),
Data: buff,
}
assert.Nil(t, c.Send(context.TODO(), req))
nm, err := c.Receive(context.TODO())
assert.Nil(t, err)
assert.Equal(t, nm.MsgType, simpleResponseType)
resp := nm.Msg.(simpleResponse)
assert.Equal(t, resp.Val, 10)
}
// Send opens the connection to 'dst' and sends the message 'req'. The
// reply is returned, or an error if the timeout of 10 seconds is reached.
func (c *Client) Send(dst *network.ServerIdentity, msg network.Body) (*network.Packet, error) {
c.Lock()
defer c.Unlock()
if c.host == nil {
kp := config.NewKeyPair(network.Suite)
c.host = network.NewSecureTCPHost(kp.Secret,
network.NewServerIdentity(kp.Public, ""))
}
// Connect to the root
log.Lvl4("Opening connection to", dst)
con, err := c.host.Open(dst)
defer c.host.Close()
if err != nil {
return nil, err
}
m, err := network.NewNetworkMessage(msg)
if err != nil {
return nil, err
}
b, err := m.MarshalBinary()
if err != nil {
return nil, err
}
serviceReq := &ClientRequest{
Service: c.ServiceID,
Data: b,
}
pchan := make(chan network.Packet)
go func() {
// send the request
log.Lvlf4("Sending request %x", serviceReq.Service)
if err := con.Send(context.TODO(), serviceReq); err != nil {
close(pchan)
return
}
log.Lvl4("Waiting for the response from", reflect.ValueOf(con).Pointer())
// wait for the response
packet, err := con.Receive(context.TODO())
if err != nil {
packet.Msg = StatusRet{err.Error()}
packet.MsgType = network.TypeFromData(&StatusRet{})
}
pchan <- packet
}()
select {
case response := <-pchan:
log.Lvlf5("Response: %+v %+v", response, response.Msg)
// Catch an eventual error
err := ErrMsg(&response, nil)
if err != nil {
return nil, err
}
return &response, nil
case <-time.After(time.Second * 10):
return &network.Packet{}, errors.New("Timeout on sending message")
}
}