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server/vendor/github.com/pion/sctp/error_cause.go

@@ -0,0 +1,101 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package sctp
+
+import (
+	"encoding/binary"
+	"errors"
+	"fmt"
+)
+
+// errorCauseCode is a cause code that appears in either a ERROR or ABORT chunk
+type errorCauseCode uint16
+
+type errorCause interface {
+	unmarshal([]byte) error
+	marshal() ([]byte, error)
+	length() uint16
+	String() string
+
+	errorCauseCode() errorCauseCode
+}
+
+// Error and abort chunk errors
+var (
+	ErrBuildErrorCaseHandle = errors.New("BuildErrorCause does not handle")
+)
+
+// buildErrorCause delegates the building of a error cause from raw bytes to the correct structure
+func buildErrorCause(raw []byte) (errorCause, error) {
+	var e errorCause
+
+	c := errorCauseCode(binary.BigEndian.Uint16(raw[0:]))
+	switch c {
+	case invalidMandatoryParameter:
+		e = &errorCauseInvalidMandatoryParameter{}
+	case unrecognizedChunkType:
+		e = &errorCauseUnrecognizedChunkType{}
+	case protocolViolation:
+		e = &errorCauseProtocolViolation{}
+	case userInitiatedAbort:
+		e = &errorCauseUserInitiatedAbort{}
+	default:
+		return nil, fmt.Errorf("%w: %s", ErrBuildErrorCaseHandle, c.String())
+	}
+
+	if err := e.unmarshal(raw); err != nil {
+		return nil, err
+	}
+
+	return e, nil
+}
+
+const (
+	invalidStreamIdentifier                errorCauseCode = 1
+	missingMandatoryParameter              errorCauseCode = 2
+	staleCookieError                       errorCauseCode = 3
+	outOfResource                          errorCauseCode = 4
+	unresolvableAddress                    errorCauseCode = 5
+	unrecognizedChunkType                  errorCauseCode = 6
+	invalidMandatoryParameter              errorCauseCode = 7
+	unrecognizedParameters                 errorCauseCode = 8
+	noUserData                             errorCauseCode = 9
+	cookieReceivedWhileShuttingDown        errorCauseCode = 10
+	restartOfAnAssociationWithNewAddresses errorCauseCode = 11
+	userInitiatedAbort                     errorCauseCode = 12
+	protocolViolation                      errorCauseCode = 13
+)
+
+func (e errorCauseCode) String() string {
+	switch e {
+	case invalidStreamIdentifier:
+		return "Invalid Stream Identifier"
+	case missingMandatoryParameter:
+		return "Missing Mandatory Parameter"
+	case staleCookieError:
+		return "Stale Cookie Error"
+	case outOfResource:
+		return "Out Of Resource"
+	case unresolvableAddress:
+		return "Unresolvable IP"
+	case unrecognizedChunkType:
+		return "Unrecognized Chunk Type"
+	case invalidMandatoryParameter:
+		return "Invalid Mandatory Parameter"
+	case unrecognizedParameters:
+		return "Unrecognized Parameters"
+	case noUserData:
+		return "No User Data"
+	case cookieReceivedWhileShuttingDown:
+		return "Cookie Received While Shutting Down"
+	case restartOfAnAssociationWithNewAddresses:
+		return "Restart Of An Association With New Addresses"
+	case userInitiatedAbort:
+		return "User Initiated Abort"
+	case protocolViolation:
+		return "Protocol Violation"
+	default:
+		return fmt.Sprintf("Unknown CauseCode: %d", e)
+	}
+}