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97db14083a
* chore_: bump go-waku with filter loop fix * fix_: correct fleet node for staging fleet * fix_: use shards for lightclient init --------- Co-authored-by: Richard Ramos <info@richardramos.me>
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
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// SPDX-License-Identifier: MIT
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package sctp
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import (
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"encoding/binary"
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"errors"
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)
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// errorCauseHeader represents the shared header that is shared by all error causes
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type errorCauseHeader struct {
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code errorCauseCode
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len uint16
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raw []byte
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}
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const (
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errorCauseHeaderLength = 4
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)
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// ErrInvalidSCTPChunk is returned when an SCTP chunk is invalid
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var ErrInvalidSCTPChunk = errors.New("invalid SCTP chunk")
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func (e *errorCauseHeader) marshal() ([]byte, error) {
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e.len = uint16(len(e.raw)) + uint16(errorCauseHeaderLength)
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raw := make([]byte, e.len)
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binary.BigEndian.PutUint16(raw[0:], uint16(e.code))
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binary.BigEndian.PutUint16(raw[2:], e.len)
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copy(raw[errorCauseHeaderLength:], e.raw)
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return raw, nil
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}
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func (e *errorCauseHeader) unmarshal(raw []byte) error {
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e.code = errorCauseCode(binary.BigEndian.Uint16(raw[0:]))
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e.len = binary.BigEndian.Uint16(raw[2:])
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if e.len < errorCauseHeaderLength || int(e.len) > len(raw) {
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return ErrInvalidSCTPChunk
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}
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valueLength := e.len - errorCauseHeaderLength
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e.raw = raw[errorCauseHeaderLength : errorCauseHeaderLength+valueLength]
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return nil
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}
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func (e *errorCauseHeader) length() uint16 {
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return e.len
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}
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func (e *errorCauseHeader) errorCauseCode() errorCauseCode {
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return e.code
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}
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// String makes errorCauseHeader printable
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func (e errorCauseHeader) String() string {
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return e.code.String()
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}
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