65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package solver
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import (
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"context"
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"fmt"
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"net"
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"strings"
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"time"
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"github.com/moby/buildkit/session"
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"github.com/moby/buildkit/session/sshforward"
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"google.golang.org/grpc"
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"google.golang.org/grpc/metadata"
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)
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const (
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unixPrefix = "unix="
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)
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type SocketProvider struct {
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}
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func NewDockerSocketProvider() session.Attachable {
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return &SocketProvider{}
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}
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func (sp *SocketProvider) Register(server *grpc.Server) {
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sshforward.RegisterSSHServer(server, sp)
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}
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func (sp *SocketProvider) CheckAgent(ctx context.Context, req *sshforward.CheckAgentRequest) (*sshforward.CheckAgentResponse, error) {
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id := sshforward.DefaultID
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if req.ID != "" {
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id = req.ID
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}
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if !strings.HasPrefix(id, unixPrefix) {
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return &sshforward.CheckAgentResponse{}, fmt.Errorf("invalid socket forward key %s", id)
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}
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return &sshforward.CheckAgentResponse{}, nil
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}
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func (sp *SocketProvider) ForwardAgent(stream sshforward.SSH_ForwardAgentServer) error {
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id := sshforward.DefaultID
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opts, _ := metadata.FromIncomingContext(stream.Context()) // if no metadata continue with empty object
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if v, ok := opts[sshforward.KeySSHID]; ok && len(v) > 0 && v[0] != "" {
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id = v[0]
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}
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if !strings.HasPrefix(id, unixPrefix) {
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return fmt.Errorf("invalid socket forward key %s", id)
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}
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id = strings.TrimPrefix(id, unixPrefix)
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conn, err := net.DialTimeout("unix", id, time.Second)
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if err != nil {
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return fmt.Errorf("failed to connect to %s: %w", id, err)
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}
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defer conn.Close()
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return sshforward.Copy(context.TODO(), conn, stream, nil)
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}
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