forked from libp2p/go-libp2p
/
dial_error.go
71 lines (58 loc) · 1.51 KB
/
dial_error.go
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package swarm
import (
"fmt"
"os"
"strings"
"github.com/libp2p/go-libp2p-core/peer"
ma "github.com/multiformats/go-multiaddr"
)
// maxDialDialErrors is the maximum number of dial errors we record
const maxDialDialErrors = 16
// DialError is the error type returned when dialing.
type DialError struct {
Peer peer.ID
DialErrors []TransportError
Cause error
Skipped int
}
func (e *DialError) Timeout() bool {
return os.IsTimeout(e.Cause)
}
func (e *DialError) recordErr(addr ma.Multiaddr, err error) {
if len(e.DialErrors) >= maxDialDialErrors {
e.Skipped++
return
}
e.DialErrors = append(e.DialErrors, TransportError{
Address: addr,
Cause: err,
})
}
func (e *DialError) Error() string {
var builder strings.Builder
fmt.Fprintf(&builder, "failed to dial %s:", e.Peer)
if e.Cause != nil {
fmt.Fprintf(&builder, " %s", e.Cause)
}
for _, te := range e.DialErrors {
fmt.Fprintf(&builder, "\n * [%s] %s", te.Address, te.Cause)
}
if e.Skipped > 0 {
fmt.Fprintf(&builder, "\n ... skipping %d errors ...", e.Skipped)
}
return builder.String()
}
// Unwrap implements https://godoc.org/golang.org/x/xerrors#Wrapper.
func (e *DialError) Unwrap() error {
return e.Cause
}
var _ error = (*DialError)(nil)
// TransportError is the error returned when dialing a specific address.
type TransportError struct {
Address ma.Multiaddr
Cause error
}
func (e *TransportError) Error() string {
return fmt.Sprintf("failed to dial %s: %s", e.Address, e.Cause)
}
var _ error = (*TransportError)(nil)