/
errors.go
197 lines (152 loc) · 4.37 KB
/
errors.go
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package lowlevel
import (
"errors"
"fmt"
"github.com/companyzero/bisonrelay/client/clientintf"
"github.com/companyzero/bisonrelay/rpc"
)
var (
errRMQExiting = fmt.Errorf("rmq: %w", clientintf.ErrSubsysExiting)
errRdvzMgrExiting = fmt.Errorf("rendezvous manager: %w", clientintf.ErrSubsysExiting)
errNoPeerTLSCert = errors.New("server did not send any TLS certs")
errPongTimeout = errors.New("pong timeout")
// errSessRequestedClose is a guard error to signal the session was
// closed on request.
errSessRequestedClose = errors.New("requested session close")
errORMTooLarge = errors.New("outbound RM encrypted len greater than max allowed msg size")
)
// kxError is returned when the server KX stage fails.
type kxError struct {
err error
}
func (err kxError) Error() string {
return fmt.Sprintf("unable to complete kx: %v", err.err)
}
func (err kxError) Unwrap() error {
return err.err
}
func (err kxError) Is(target error) bool {
if _, ok := target.(kxError); ok {
return true
}
return false
}
func makeKxError(err error) kxError {
return kxError{err: err}
}
// AckError is an error generated when the server sends an Acknowledge message
// with an embedded Error message.
//
// Is is also used in client code to signal a given pushed message was
// processed with an error.
type AckError struct {
ErrorStr string
ErrorCode int
NonFatal bool
}
func (err AckError) Error() string {
return fmt.Sprintf("server returned ack error %d: %s",
err.ErrorCode, err.ErrorStr)
}
func (err AckError) Is(target error) bool {
if _, ok := target.(AckError); ok {
return true
}
return false
}
func makeAckError(ack *rpc.Acknowledge) AckError {
return AckError{ack.Error, ack.ErrorCode, false}
}
// UnwelcomeError is an error generated when the server responds with an
// Unwelcome message during the welcome stage of connection setup.
type UnwelcomeError struct {
Reason string
}
func (err UnwelcomeError) Error() string {
return fmt.Sprintf("server un-welcomed connection: %s", err.Reason)
}
func (err UnwelcomeError) Is(target error) bool {
if _, ok := target.(UnwelcomeError); ok {
return true
}
return false
}
func makeUnwelcomeError(reason string) UnwelcomeError {
return UnwelcomeError{Reason: reason}
}
type invalidRecvTagError struct {
cmd string
tag uint32
}
func (err invalidRecvTagError) Error() string {
return fmt.Sprintf("server sent invalid tag %d on msg %s", err.tag, err.cmd)
}
func (err invalidRecvTagError) Is(target error) bool {
if _, ok := target.(invalidRecvTagError); ok {
return true
}
return false
}
func makeInvalidRecvTagError(cmd string, tag uint32) invalidRecvTagError {
return invalidRecvTagError{cmd: cmd, tag: tag}
}
// ToAck copies this error to the given Acknowledge msg.
func (err AckError) ToAck(ack *rpc.Acknowledge) {
ack.Error = err.ErrorStr
ack.ErrorCode = err.ErrorCode
}
type unmarshalError struct {
what string
err error
}
func (err unmarshalError) Error() string {
return fmt.Sprintf("unable to unmarshal %s: %v", err.what, err.err)
}
func (err unmarshalError) Unwrap() error {
return err.err
}
func (err unmarshalError) Is(target error) bool {
if _, ok := target.(unmarshalError); ok {
return true
}
return false
}
func makeUnmarshalError(what string, err error) unmarshalError {
return unmarshalError{what: what, err: err}
}
type routeMessageReplyError struct {
errorStr string
}
func (err routeMessageReplyError) Error() string {
return fmt.Sprintf("server replied error on rm: %s", err.errorStr)
}
func (err routeMessageReplyError) Is(target error) bool {
_, ok := target.(routeMessageReplyError)
return ok
}
type ErrRVAlreadySubscribed struct {
rv string
}
func (err ErrRVAlreadySubscribed) Error() string {
return fmt.Sprintf("already subscribed to rendezvous '%s'", err.rv)
}
func (err ErrRVAlreadySubscribed) Is(target error) bool {
_, ok := target.(ErrRVAlreadySubscribed)
return ok
}
func makeErrRVAlreadySubscribed(rv string) ErrRVAlreadySubscribed {
return ErrRVAlreadySubscribed{rv: rv}
}
type ErrRVAlreadyUnsubscribed struct {
rv string
}
func (err ErrRVAlreadyUnsubscribed) Error() string {
return fmt.Sprintf("already unsubscribed to rendezvous '%s'", err.rv)
}
func (err ErrRVAlreadyUnsubscribed) Is(target error) bool {
_, ok := target.(ErrRVAlreadyUnsubscribed)
return ok
}
func makeRdvzAlreadyUnsubscribedError(rv string) ErrRVAlreadyUnsubscribed {
return ErrRVAlreadyUnsubscribed{rv: rv}
}