2a59679766
* separate TLS options from server options (because we need them for dialing too) * stop creating transports in multiple places * ensure that we actually check revocation, whitelists, certificate signing, etc, for all connections.
126 lines
3.6 KiB
Go
126 lines
3.6 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package transport
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import (
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"context"
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"time"
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"github.com/zeebo/errs"
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"google.golang.org/grpc"
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monkit "gopkg.in/spacemonkeygo/monkit.v2"
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"storj.io/storj/pkg/identity"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/peertls/tlsopts"
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"storj.io/storj/pkg/storj"
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)
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var (
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mon = monkit.Package()
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//Error is the errs class of standard Transport Client errors
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Error = errs.Class("transport error")
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// default time to wait for a connection to be established
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timeout = 20 * time.Second
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)
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// Observer implements the ConnSuccess and ConnFailure methods
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// for Discovery and other services to use
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type Observer interface {
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ConnSuccess(ctx context.Context, node *pb.Node)
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ConnFailure(ctx context.Context, node *pb.Node, err error)
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}
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// Client defines the interface to an transport client.
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type Client interface {
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DialNode(ctx context.Context, node *pb.Node, opts ...grpc.DialOption) (*grpc.ClientConn, error)
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DialAddress(ctx context.Context, address string, opts ...grpc.DialOption) (*grpc.ClientConn, error)
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Identity() *identity.FullIdentity
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WithObservers(obs ...Observer) *Transport
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}
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// Transport interface structure
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type Transport struct {
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tlsOpts *tlsopts.Options
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observers []Observer
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}
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// NewClient returns a newly instantiated Transport Client
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func NewClient(tlsOpts *tlsopts.Options, obs ...Observer) Client {
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return &Transport{
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tlsOpts: tlsOpts,
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observers: obs,
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}
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}
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// DialNode returns a grpc connection with tls to a node
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func (transport *Transport) DialNode(ctx context.Context, node *pb.Node, opts ...grpc.DialOption) (conn *grpc.ClientConn, err error) {
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defer mon.Task()(&ctx)(&err)
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if node != nil {
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node.Type.DPanicOnInvalid("transport dial node")
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}
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if node.Address == nil || node.Address.Address == "" {
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return nil, Error.New("no address")
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}
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// add ID of node we are wanting to connect to
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dialOpt := transport.tlsOpts.DialOption(node.Id)
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options := append([]grpc.DialOption{dialOpt, grpc.WithBlock(), grpc.FailOnNonTempDialError(true)}, opts...)
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ctx, cf := context.WithTimeout(ctx, timeout)
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defer cf()
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conn, err = grpc.DialContext(ctx, node.GetAddress().Address, options...)
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if err != nil {
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if err == context.Canceled {
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return nil, err
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}
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alertFail(ctx, transport.observers, node, err)
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return nil, Error.Wrap(err)
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}
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alertSuccess(ctx, transport.observers, node)
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return conn, nil
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}
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// DialAddress returns a grpc connection with tls to an IP address
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func (transport *Transport) DialAddress(ctx context.Context, address string, opts ...grpc.DialOption) (conn *grpc.ClientConn, err error) {
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defer mon.Task()(&ctx)(&err)
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dialOpt := transport.tlsOpts.DialOption(storj.NodeID{})
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options := append([]grpc.DialOption{dialOpt, grpc.WithBlock(), grpc.FailOnNonTempDialError(true)}, opts...)
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conn, err = grpc.DialContext(ctx, address, options...)
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if err == context.Canceled {
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return nil, err
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}
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return conn, Error.Wrap(err)
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}
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// Identity is a getter for the transport's identity
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func (transport *Transport) Identity() *identity.FullIdentity {
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return transport.tlsOpts.Ident
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}
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// WithObservers returns a new transport including the listed observers.
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func (transport *Transport) WithObservers(obs ...Observer) *Transport {
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tr := &Transport{tlsOpts: transport.tlsOpts}
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tr.observers = append(tr.observers, transport.observers...)
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tr.observers = append(tr.observers, obs...)
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return tr
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}
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func alertFail(ctx context.Context, obs []Observer, node *pb.Node, err error) {
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for _, o := range obs {
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o.ConnFailure(ctx, node, err)
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}
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}
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func alertSuccess(ctx context.Context, obs []Observer, node *pb.Node) {
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for _, o := range obs {
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o.ConnSuccess(ctx, node)
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}
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}
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