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