ceremonyclient/go-libp2p/p2p/net/swarm/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
}
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e.DialErrors = append(e.DialErrors, TransportError{Address: addr, Cause: err})
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}
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()
}
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func (e *DialError) Unwrap() []error {
if e == nil {
return nil
}
errs := make([]error, len(e.DialErrors)+1)
if e.Cause != nil {
errs = append(errs, e.Cause)
}
for i := 0; i < len(e.DialErrors); i++ {
errs = append(errs, &e.DialErrors[i])
}
return errs
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}
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)
}
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func (e *TransportError) Unwrap() error {
return e.Cause
}
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var _ error = (*TransportError)(nil)