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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package client | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "net" | ||
|
|
||
| "github.com/skycoin/dmsg/cipher" | ||
| "github.com/skycoin/skycoin/src/util/logging" | ||
|
|
||
| "github.com/skycoin/skywire/pkg/snet" | ||
| ) | ||
|
|
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| // Client interacts with setup nodes. | ||
| type Client interface { | ||
| Dial(context.Context) (*snet.Conn, error) | ||
| Serve() error | ||
| IsTrusted(sPK cipher.PubKey) bool | ||
| } | ||
|
|
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| type handlerFunc func(net.Conn) error | ||
|
|
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| type client struct { | ||
| Logger *logging.Logger | ||
|
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| network *snet.Network | ||
| sl *snet.Listener | ||
| nodes []cipher.PubKey | ||
| handler handlerFunc | ||
| } | ||
|
|
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| // New returns a new setup node client instance. | ||
| func New(network *snet.Network, sl *snet.Listener, nodes []cipher.PubKey, handler handlerFunc) Client { | ||
| c := &client{ | ||
| Logger: logging.MustGetLogger("setup-client"), | ||
|
|
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| network: network, | ||
| sl: sl, | ||
| nodes: nodes, | ||
| handler: handler, | ||
| } | ||
|
|
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| return c | ||
| } | ||
|
|
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| // TODO: use context | ||
| func (c *client) Dial(ctx context.Context) (*snet.Conn, error) { | ||
| for _, sPK := range c.nodes { | ||
| conn, err := c.network.Dial(snet.DmsgType, sPK, snet.SetupPort) | ||
| if err != nil { | ||
| c.Logger.WithError(err).Warnf("failed to dial to setup node: setupPK(%s)", sPK) | ||
| continue | ||
| } | ||
| return conn, nil | ||
| } | ||
| return nil, errors.New("failed to dial to a setup node") | ||
| } | ||
|
|
||
| // ServeConnLoop initiates serving connections by route manager. | ||
| func (c *client) Serve() error { | ||
| // Accept setup node request loop. | ||
| for { | ||
| if err := c.serveConn(); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (c *client) serveConn() error { | ||
| conn, err := c.sl.AcceptConn() | ||
| if err != nil { | ||
| c.Logger.WithError(err).Warnf("stopped serving") | ||
| return err | ||
| } | ||
| if !c.IsTrusted(conn.RemotePK()) { | ||
| c.Logger.Warnf("closing conn from untrusted setup node: %v", conn.Close()) | ||
| return nil | ||
| } | ||
| go func() { | ||
| c.Logger.Infof("handling setup request: setupPK(%s)", conn.RemotePK()) | ||
| if err := c.handler(conn); err != nil { | ||
| c.Logger.WithError(err).Warnf("setup request failed: setupPK(%s)", conn.RemotePK()) | ||
| } | ||
| c.Logger.Infof("successfully handled setup request: setupPK(%s)", conn.RemotePK()) | ||
| }() | ||
| return nil | ||
| } | ||
|
|
||
| // SetupIsTrusted checks if setup node is trusted. | ||
| func (c *client) IsTrusted(sPK cipher.PubKey) bool { | ||
| for _, pk := range c.nodes { | ||
| if sPK == pk { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } |