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transport.go
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transport.go
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// Package transport defines a common interface for
// network connections that have an associated client identity.
package transport
import (
"context"
"net"
"syscall"
"github.com/pkg/errors"
"github.com/zrepl/zrepl/daemon/logging"
"github.com/zrepl/zrepl/logger"
"github.com/zrepl/zrepl/rpc/dataconn/timeoutconn"
"github.com/zrepl/zrepl/zfs"
)
type AuthConn struct {
Wire
clientIdentity string
}
var _ timeoutconn.SyscallConner = AuthConn{}
func (a AuthConn) SyscallConn() (rawConn syscall.RawConn, err error) {
scc, ok := a.Wire.(timeoutconn.SyscallConner)
if !ok {
return nil, timeoutconn.SyscallConnNotSupported
}
return scc.SyscallConn()
}
func NewAuthConn(conn Wire, clientIdentity string) *AuthConn {
return &AuthConn{conn, clientIdentity}
}
func (c *AuthConn) ClientIdentity() string {
if err := ValidateClientIdentity(c.clientIdentity); err != nil {
panic(err)
}
return c.clientIdentity
}
// like net.Listener, but with an AuthenticatedConn instead of net.Conn
type AuthenticatedListener interface {
Addr() net.Addr
Accept(ctx context.Context) (*AuthConn, error)
Close() error
}
type AuthenticatedListenerFactory func() (AuthenticatedListener, error)
type Wire = timeoutconn.Wire
type Connecter interface {
Connect(ctx context.Context) (Wire, error)
}
// A client identity must be a single component in a ZFS filesystem path
func ValidateClientIdentity(in string) error {
err := zfs.ComponentNamecheck(in)
if err != nil {
return errors.Wrap(err, "client identity must be usable as a single dataset path component")
}
return nil
}
type Logger = logger.Logger
func GetLogger(ctx context.Context) Logger {
return logging.GetLogger(ctx, logging.SubsysTransport)
}