Source File
	error_cause_protocol_violation.go

Belonging Package
	github.com/pion/sctp

// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT

package sctp

import (
	"errors"
	"fmt"
)

/*
This error cause MAY be included in ABORT chunks that are sent
because an SCTP endpoint detects a protocol violation of the peer
that is not covered by the error causes described in Section 3.3.10.1
to Section 3.3.10.12.  An implementation MAY provide additional
information specifying what kind of protocol violation has been
detected.

	 0                   1                   2                   3
	 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|         Cause Code=13         |      Cause Length=Variable    |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	/                    Additional Information                     /
	\                                                               \
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
type errorCauseProtocolViolation struct {
	errorCauseHeader
	additionalInformation []byte
}

// Abort chunk errors.
var (
	ErrProtocolViolationUnmarshal = errors.New("unable to unmarshal Protocol Violation error")
)

func (e *errorCauseProtocolViolation) marshal() ([]byte, error) {
	e.raw = e.additionalInformation

	return e.errorCauseHeader.marshal()
}

func (e *errorCauseProtocolViolation) unmarshal(raw []byte) error {
	err := e.errorCauseHeader.unmarshal(raw)
	if err != nil {
		return fmt.Errorf("%w: %v", ErrProtocolViolationUnmarshal, err) //nolint:errorlint
	}

	e.additionalInformation = e.raw

	return nil
}

// String makes errorCauseProtocolViolation printable.
func (e *errorCauseProtocolViolation) String() string {
	return fmt.Sprintf("%s: %s", e.errorCauseHeader, e.additionalInformation)
}

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