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直播：后台 JWT 推流、前台画中画；WebRTC 服务与 Nginx WebSocket 代理

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whm
2026-03-25 15:00:14 +08:00
parent b83ec91b1a
commit 7811adca66
1050 changed files with 146524 additions and 37 deletions
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28
server/vendor/github.com/pion/datachannel/.gitignore generated vendored Normal file
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# SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
# SPDX-License-Identifier: MIT
### JetBrains IDE ###
#####################
.idea/
### Emacs Temporary Files ###
#############################
*~
### Folders ###
###############
bin/
vendor/
node_modules/
### Files ###
#############
*.ivf
*.ogg
tags
cover.out
*.sw[poe]
*.wasm
examples/sfu-ws/cert.pem
examples/sfu-ws/key.pem
wasm_exec.js

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# SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
# SPDX-License-Identifier: MIT
linters-settings:
govet:
enable:
- shadow
misspell:
locale: US
exhaustive:
default-signifies-exhaustive: true
gomodguard:
blocked:
modules:
- github.com/pkg/errors:
recommendations:
- errors
forbidigo:
forbid:
- ^fmt.Print(f|ln)?$
- ^log.(Panic|Fatal|Print)(f|ln)?$
- ^os.Exit$
- ^panic$
- ^print(ln)?$
linters:
enable:
- asciicheck # Simple linter to check that your code does not contain non-ASCII identifiers
- bidichk # Checks for dangerous unicode character sequences
- bodyclose # checks whether HTTP response body is closed successfully
- contextcheck # check the function whether use a non-inherited context
- decorder # check declaration order and count of types, constants, variables and functions
- dogsled # Checks assignments with too many blank identifiers (e.g. x, _, _, _, := f())
- dupl # Tool for code clone detection
- durationcheck # check for two durations multiplied together
- errcheck # Errcheck is a program for checking for unchecked errors in go programs. These unchecked errors can be critical bugs in some cases
- errchkjson # Checks types passed to the json encoding functions. Reports unsupported types and optionally reports occations, where the check for the returned error can be omitted.
- errname # Checks that sentinel errors are prefixed with the `Err` and error types are suffixed with the `Error`.
- errorlint # errorlint is a linter for that can be used to find code that will cause problems with the error wrapping scheme introduced in Go 1.13.
- exhaustive # check exhaustiveness of enum switch statements
- exportloopref # checks for pointers to enclosing loop variables
- forbidigo # Forbids identifiers
- forcetypeassert # finds forced type assertions
- gci # Gci control golang package import order and make it always deterministic.
- gochecknoglobals # Checks that no globals are present in Go code
- gochecknoinits # Checks that no init functions are present in Go code
- gocognit # Computes and checks the cognitive complexity of functions
- goconst # Finds repeated strings that could be replaced by a constant
- gocritic # The most opinionated Go source code linter
- godox # Tool for detection of FIXME, TODO and other comment keywords
- goerr113 # Golang linter to check the errors handling expressions
- gofmt # Gofmt checks whether code was gofmt-ed. By default this tool runs with -s option to check for code simplification
- gofumpt # Gofumpt checks whether code was gofumpt-ed.
- goheader # Checks is file header matches to pattern
- goimports # Goimports does everything that gofmt does. Additionally it checks unused imports
- gomoddirectives # Manage the use of 'replace', 'retract', and 'excludes' directives in go.mod.
- gomodguard # Allow and block list linter for direct Go module dependencies. This is different from depguard where there are different block types for example version constraints and module recommendations.
- goprintffuncname # Checks that printf-like functions are named with `f` at the end
- gosec # Inspects source code for security problems
- gosimple # Linter for Go source code that specializes in simplifying a code
- govet # Vet examines Go source code and reports suspicious constructs, such as Printf calls whose arguments do not align with the format string
- grouper # An analyzer to analyze expression groups.
- importas # Enforces consistent import aliases
- ineffassign # Detects when assignments to existing variables are not used
- misspell # Finds commonly misspelled English words in comments
- nilerr # Finds the code that returns nil even if it checks that the error is not nil.
- nilnil # Checks that there is no simultaneous return of `nil` error and an invalid value.
- noctx # noctx finds sending http request without context.Context
- predeclared # find code that shadows one of Go's predeclared identifiers
- revive # golint replacement, finds style mistakes
- staticcheck # Staticcheck is a go vet on steroids, applying a ton of static analysis checks
- stylecheck # Stylecheck is a replacement for golint
- tagliatelle # Checks the struct tags.
- tenv # tenv is analyzer that detects using os.Setenv instead of t.Setenv since Go1.17
- tparallel # tparallel detects inappropriate usage of t.Parallel() method in your Go test codes
- typecheck # Like the front-end of a Go compiler, parses and type-checks Go code
- unconvert # Remove unnecessary type conversions
- unparam # Reports unused function parameters
- unused # Checks Go code for unused constants, variables, functions and types
- wastedassign # wastedassign finds wasted assignment statements
- whitespace # Tool for detection of leading and trailing whitespace
disable:
- depguard # Go linter that checks if package imports are in a list of acceptable packages
- containedctx # containedctx is a linter that detects struct contained context.Context field
- cyclop # checks function and package cyclomatic complexity
- exhaustivestruct # Checks if all struct's fields are initialized
- funlen # Tool for detection of long functions
- gocyclo # Computes and checks the cyclomatic complexity of functions
- godot # Check if comments end in a period
- gomnd # An analyzer to detect magic numbers.
- ifshort # Checks that your code uses short syntax for if-statements whenever possible
- ireturn # Accept Interfaces, Return Concrete Types
- lll # Reports long lines
- maintidx # maintidx measures the maintainability index of each function.
- makezero # Finds slice declarations with non-zero initial length
- maligned # Tool to detect Go structs that would take less memory if their fields were sorted
- nakedret # Finds naked returns in functions greater than a specified function length
- nestif # Reports deeply nested if statements
- nlreturn # nlreturn checks for a new line before return and branch statements to increase code clarity
- nolintlint # Reports ill-formed or insufficient nolint directives
- paralleltest # paralleltest detects missing usage of t.Parallel() method in your Go test
- prealloc # Finds slice declarations that could potentially be preallocated
- promlinter # Check Prometheus metrics naming via promlint
- rowserrcheck # checks whether Err of rows is checked successfully
- sqlclosecheck # Checks that sql.Rows and sql.Stmt are closed.
- testpackage # linter that makes you use a separate _test package
- thelper # thelper detects golang test helpers without t.Helper() call and checks the consistency of test helpers
- varnamelen # checks that the length of a variable's name matches its scope
- wrapcheck # Checks that errors returned from external packages are wrapped
- wsl # Whitespace Linter - Forces you to use empty lines!
issues:
exclude-use-default: false
exclude-dirs-use-default: false
exclude-rules:
# Allow complex tests and examples, better to be self contained
- path: (examples|main\.go|_test\.go)
linters:
- forbidigo
- gocognit
# Allow forbidden identifiers in CLI commands
- path: cmd
linters:
- forbidigo

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

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server/vendor/github.com/pion/datachannel/LICENSE generated vendored Normal file
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MIT License
Copyright (c) 2023 The Pion community <https://pion.ly>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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<h1 align="center">
<br>
Pion Data Channels
<br>
</h1>
<h4 align="center">A Go implementation of WebRTC Data Channels</h4>
<p align="center">
<a href="https://pion.ly"><img src="https://img.shields.io/badge/pion-datachannel-gray.svg?longCache=true&colorB=brightgreen" alt="Pion Data Channels"></a>
<a href="https://pion.ly/slack"><img src="https://img.shields.io/badge/join-us%20on%20slack-gray.svg?longCache=true&logo=slack&colorB=brightgreen" alt="Slack Widget"></a>
<br>
<img alt="GitHub Workflow Status" src="https://img.shields.io/github/actions/workflow/status/pion/datachannel/test.yaml">
<a href="https://pkg.go.dev/github.com/pion/datachannel"><img src="https://pkg.go.dev/badge/github.com/pion/datachannel.svg" alt="Go Reference"></a>
<a href="https://codecov.io/gh/pion/datachannel"><img src="https://codecov.io/gh/pion/datachannel/branch/master/graph/badge.svg" alt="Coverage Status"></a>
<a href="https://goreportcard.com/report/github.com/pion/datachannel"><img src="https://goreportcard.com/badge/github.com/pion/datachannel" alt="Go Report Card"></a>
<a href="LICENSE"><img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="License: MIT"></a>
</p>
<br>
### Roadmap
The library is used as a part of our WebRTC implementation. Please refer to that [roadmap](https://github.com/pion/webrtc/issues/9) to track our major milestones.
### Community
Pion has an active community on the [Slack](https://pion.ly/slack).
Follow the [Pion Twitter](https://twitter.com/_pion) for project updates and important WebRTC news.
We are always looking to support **your projects**. Please reach out if you have something to build!
If you need commercial support or don't want to use public methods you can contact us at [team@pion.ly](mailto:team@pion.ly)
### Contributing
Check out the [contributing wiki](https://github.com/pion/webrtc/wiki/Contributing) to join the group of amazing people making this project possible
### License
MIT License - see [LICENSE](LICENSE) for full text

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server/vendor/github.com/pion/datachannel/codecov.yml generated vendored Normal file
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#
# DO NOT EDIT THIS FILE
#
# It is automatically copied from https://github.com/pion/.goassets repository.
#
# SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
# SPDX-License-Identifier: MIT
coverage:
status:
project:
default:
# Allow decreasing 2% of total coverage to avoid noise.
threshold: 2%
patch:
default:
target: 70%
only_pulls: true
ignore:
- "examples/*"
- "examples/**/*"

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server/vendor/github.com/pion/datachannel/datachannel.go generated vendored Normal file
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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
// Package datachannel implements WebRTC Data Channels
package datachannel
import (
"errors"
"fmt"
"io"
"sync"
"sync/atomic"
"time"
"github.com/pion/logging"
"github.com/pion/sctp"
)
const receiveMTU = 8192
// Reader is an extended io.Reader
// that also returns if the message is text.
type Reader interface {
ReadDataChannel([]byte) (int, bool, error)
}
// ReadDeadliner extends an io.Reader to expose setting a read deadline.
type ReadDeadliner interface {
SetReadDeadline(time.Time) error
}
// Writer is an extended io.Writer
// that also allows indicating if a message is text.
type Writer interface {
WriteDataChannel([]byte, bool) (int, error)
}
// ReadWriteCloser is an extended io.ReadWriteCloser
// that also implements our Reader and Writer.
type ReadWriteCloser interface {
io.Reader
io.Writer
Reader
Writer
io.Closer
}
// DataChannel represents a data channel
type DataChannel struct {
Config
// stats
messagesSent uint32
messagesReceived uint32
bytesSent uint64
bytesReceived uint64
mu sync.Mutex
onOpenCompleteHandler func()
openCompleteHandlerOnce sync.Once
stream *sctp.Stream
log logging.LeveledLogger
}
// Config is used to configure the data channel.
type Config struct {
ChannelType ChannelType
Negotiated bool
Priority uint16
ReliabilityParameter uint32
Label string
Protocol string
LoggerFactory logging.LoggerFactory
}
func newDataChannel(stream *sctp.Stream, config *Config) *DataChannel {
return &DataChannel{
Config: *config,
stream: stream,
log: config.LoggerFactory.NewLogger("datachannel"),
}
}
// Dial opens a data channels over SCTP
func Dial(a *sctp.Association, id uint16, config *Config) (*DataChannel, error) {
stream, err := a.OpenStream(id, sctp.PayloadTypeWebRTCBinary)
if err != nil {
return nil, err
}
dc, err := Client(stream, config)
if err != nil {
return nil, err
}
return dc, nil
}
// Client opens a data channel over an SCTP stream
func Client(stream *sctp.Stream, config *Config) (*DataChannel, error) {
msg := &channelOpen{
ChannelType: config.ChannelType,
Priority: config.Priority,
ReliabilityParameter: config.ReliabilityParameter,
Label: []byte(config.Label),
Protocol: []byte(config.Protocol),
}
if !config.Negotiated {
rawMsg, err := msg.Marshal()
if err != nil {
return nil, fmt.Errorf("failed to marshal ChannelOpen %w", err)
}
if _, err = stream.WriteSCTP(rawMsg, sctp.PayloadTypeWebRTCDCEP); err != nil {
return nil, fmt.Errorf("failed to send ChannelOpen %w", err)
}
}
dc := newDataChannel(stream, config)
if err := dc.commitReliabilityParams(); err != nil {
return nil, err
}
return dc, nil
}
// Accept is used to accept incoming data channels over SCTP
func Accept(a *sctp.Association, config *Config, existingChannels ...*DataChannel) (*DataChannel, error) {
stream, err := a.AcceptStream()
if err != nil {
return nil, err
}
for _, ch := range existingChannels {
if ch.StreamIdentifier() == stream.StreamIdentifier() {
ch.stream.SetDefaultPayloadType(sctp.PayloadTypeWebRTCBinary)
return ch, nil
}
}
stream.SetDefaultPayloadType(sctp.PayloadTypeWebRTCBinary)
dc, err := Server(stream, config)
if err != nil {
return nil, err
}
return dc, nil
}
// Server accepts a data channel over an SCTP stream
func Server(stream *sctp.Stream, config *Config) (*DataChannel, error) {
buffer := make([]byte, receiveMTU)
n, ppi, err := stream.ReadSCTP(buffer)
if err != nil {
return nil, err
}
if ppi != sctp.PayloadTypeWebRTCDCEP {
return nil, fmt.Errorf("%w %s", ErrInvalidPayloadProtocolIdentifier, ppi)
}
openMsg, err := parseExpectDataChannelOpen(buffer[:n])
if err != nil {
return nil, fmt.Errorf("failed to parse DataChannelOpen packet %w", err)
}
config.ChannelType = openMsg.ChannelType
config.Priority = openMsg.Priority
config.ReliabilityParameter = openMsg.ReliabilityParameter
config.Label = string(openMsg.Label)
config.Protocol = string(openMsg.Protocol)
dataChannel := newDataChannel(stream, config)
err = dataChannel.writeDataChannelAck()
if err != nil {
return nil, err
}
err = dataChannel.commitReliabilityParams()
if err != nil {
return nil, err
}
return dataChannel, nil
}
// Read reads a packet of len(p) bytes as binary data
func (c *DataChannel) Read(p []byte) (int, error) {
n, _, err := c.ReadDataChannel(p)
return n, err
}
// ReadDataChannel reads a packet of len(p) bytes
func (c *DataChannel) ReadDataChannel(p []byte) (int, bool, error) {
for {
n, ppi, err := c.stream.ReadSCTP(p)
if errors.Is(err, io.EOF) {
// When the peer sees that an incoming stream was
// reset, it also resets its corresponding outgoing stream.
if closeErr := c.stream.Close(); closeErr != nil {
return 0, false, closeErr
}
}
if err != nil {
return 0, false, err
}
if ppi == sctp.PayloadTypeWebRTCDCEP {
if err = c.handleDCEP(p[:n]); err != nil {
c.log.Errorf("Failed to handle DCEP: %s", err.Error())
}
continue
} else if ppi == sctp.PayloadTypeWebRTCBinaryEmpty || ppi == sctp.PayloadTypeWebRTCStringEmpty {
n = 0
}
atomic.AddUint32(&c.messagesReceived, 1)
atomic.AddUint64(&c.bytesReceived, uint64(n))
isString := ppi == sctp.PayloadTypeWebRTCString || ppi == sctp.PayloadTypeWebRTCStringEmpty
return n, isString, err
}
}
// SetReadDeadline sets a deadline for reads to return
func (c *DataChannel) SetReadDeadline(t time.Time) error {
return c.stream.SetReadDeadline(t)
}
// MessagesSent returns the number of messages sent
func (c *DataChannel) MessagesSent() uint32 {
return atomic.LoadUint32(&c.messagesSent)
}
// MessagesReceived returns the number of messages received
func (c *DataChannel) MessagesReceived() uint32 {
return atomic.LoadUint32(&c.messagesReceived)
}
// OnOpen sets an event handler which is invoked when
// a DATA_CHANNEL_ACK message is received.
// The handler is called only on thefor the channel opened
// https://datatracker.ietf.org/doc/html/draft-ietf-rtcweb-data-protocol-09#section-5.2
func (c *DataChannel) OnOpen(f func()) {
c.mu.Lock()
c.openCompleteHandlerOnce = sync.Once{}
c.onOpenCompleteHandler = f
c.mu.Unlock()
}
func (c *DataChannel) onOpenComplete() {
c.mu.Lock()
hdlr := c.onOpenCompleteHandler
c.mu.Unlock()
if hdlr != nil {
go c.openCompleteHandlerOnce.Do(func() {
hdlr()
})
}
}
// BytesSent returns the number of bytes sent
func (c *DataChannel) BytesSent() uint64 {
return atomic.LoadUint64(&c.bytesSent)
}
// BytesReceived returns the number of bytes received
func (c *DataChannel) BytesReceived() uint64 {
return atomic.LoadUint64(&c.bytesReceived)
}
// StreamIdentifier returns the Stream identifier associated to the stream.
func (c *DataChannel) StreamIdentifier() uint16 {
return c.stream.StreamIdentifier()
}
func (c *DataChannel) handleDCEP(data []byte) error {
msg, err := parse(data)
if err != nil {
return fmt.Errorf("failed to parse DataChannel packet %w", err)
}
switch msg := msg.(type) {
case *channelAck:
c.onOpenComplete()
default:
return fmt.Errorf("%w, wanted ACK got %v", ErrUnexpectedDataChannelType, msg)
}
return nil
}
// Write writes len(p) bytes from p as binary data
func (c *DataChannel) Write(p []byte) (n int, err error) {
return c.WriteDataChannel(p, false)
}
// WriteDataChannel writes len(p) bytes from p
func (c *DataChannel) WriteDataChannel(p []byte, isString bool) (n int, err error) {
// https://tools.ietf.org/html/draft-ietf-rtcweb-data-channel-12#section-6.6
// SCTP does not support the sending of empty user messages. Therefore,
// if an empty message has to be sent, the appropriate PPID (WebRTC
// String Empty or WebRTC Binary Empty) is used and the SCTP user
// message of one zero byte is sent. When receiving an SCTP user
// message with one of these PPIDs, the receiver MUST ignore the SCTP
// user message and process it as an empty message.
var ppi sctp.PayloadProtocolIdentifier
switch {
case !isString && len(p) > 0:
ppi = sctp.PayloadTypeWebRTCBinary
case !isString && len(p) == 0:
ppi = sctp.PayloadTypeWebRTCBinaryEmpty
case isString && len(p) > 0:
ppi = sctp.PayloadTypeWebRTCString
case isString && len(p) == 0:
ppi = sctp.PayloadTypeWebRTCStringEmpty
}
atomic.AddUint32(&c.messagesSent, 1)
atomic.AddUint64(&c.bytesSent, uint64(len(p)))
if len(p) == 0 {
_, err := c.stream.WriteSCTP([]byte{0}, ppi)
return 0, err
}
return c.stream.WriteSCTP(p, ppi)
}
func (c *DataChannel) writeDataChannelAck() error {
ack := channelAck{}
ackMsg, err := ack.Marshal()
if err != nil {
return fmt.Errorf("failed to marshal ChannelOpen ACK: %w", err)
}
if _, err = c.stream.WriteSCTP(ackMsg, sctp.PayloadTypeWebRTCDCEP); err != nil {
return fmt.Errorf("failed to send ChannelOpen ACK: %w", err)
}
return err
}
// Close closes the DataChannel and the underlying SCTP stream.
func (c *DataChannel) Close() error {
// https://tools.ietf.org/html/draft-ietf-rtcweb-data-channel-13#section-6.7
// Closing of a data channel MUST be signaled by resetting the
// corresponding outgoing streams [RFC6525]. This means that if one
// side decides to close the data channel, it resets the corresponding
// outgoing stream. When the peer sees that an incoming stream was
// reset, it also resets its corresponding outgoing stream. Once this
// is completed, the data channel is closed. Resetting a stream sets
// the Stream Sequence Numbers (SSNs) of the stream back to 'zero' with
// a corresponding notification to the application layer that the reset
// has been performed. Streams are available for reuse after a reset
// has been performed.
return c.stream.Close()
}
// BufferedAmount returns the number of bytes of data currently queued to be
// sent over this stream.
func (c *DataChannel) BufferedAmount() uint64 {
return c.stream.BufferedAmount()
}
// BufferedAmountLowThreshold returns the number of bytes of buffered outgoing
// data that is considered "low." Defaults to 0.
func (c *DataChannel) BufferedAmountLowThreshold() uint64 {
return c.stream.BufferedAmountLowThreshold()
}
// SetBufferedAmountLowThreshold is used to update the threshold.
// See BufferedAmountLowThreshold().
func (c *DataChannel) SetBufferedAmountLowThreshold(th uint64) {
c.stream.SetBufferedAmountLowThreshold(th)
}
// OnBufferedAmountLow sets the callback handler which would be called when the
// number of bytes of outgoing data buffered is lower than the threshold.
func (c *DataChannel) OnBufferedAmountLow(f func()) {
c.stream.OnBufferedAmountLow(f)
}
func (c *DataChannel) commitReliabilityParams() error {
switch c.Config.ChannelType {
case ChannelTypeReliable:
c.stream.SetReliabilityParams(false, sctp.ReliabilityTypeReliable, c.Config.ReliabilityParameter)
case ChannelTypeReliableUnordered:
c.stream.SetReliabilityParams(true, sctp.ReliabilityTypeReliable, c.Config.ReliabilityParameter)
case ChannelTypePartialReliableRexmit:
c.stream.SetReliabilityParams(false, sctp.ReliabilityTypeRexmit, c.Config.ReliabilityParameter)
case ChannelTypePartialReliableRexmitUnordered:
c.stream.SetReliabilityParams(true, sctp.ReliabilityTypeRexmit, c.Config.ReliabilityParameter)
case ChannelTypePartialReliableTimed:
c.stream.SetReliabilityParams(false, sctp.ReliabilityTypeTimed, c.Config.ReliabilityParameter)
case ChannelTypePartialReliableTimedUnordered:
c.stream.SetReliabilityParams(true, sctp.ReliabilityTypeTimed, c.Config.ReliabilityParameter)
default:
return fmt.Errorf("%w %v", ErrInvalidChannelType, c.Config.ChannelType)
}
return nil
}

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server/vendor/github.com/pion/datachannel/errors.go generated vendored Normal file
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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
package datachannel
import "errors"
var (
// ErrDataChannelMessageTooShort means that the data isn't long enough to be a valid DataChannel message
ErrDataChannelMessageTooShort = errors.New("DataChannel message is not long enough to determine type")
// ErrInvalidPayloadProtocolIdentifier means that we got a DataChannel messages with a Payload Protocol Identifier
// we don't know how to handle
ErrInvalidPayloadProtocolIdentifier = errors.New("DataChannel message Payload Protocol Identifier is value we can't handle")
// ErrInvalidChannelType means that the remote requested a channel type that we don't support
ErrInvalidChannelType = errors.New("invalid Channel Type")
// ErrInvalidMessageType is returned when a DataChannel Message has a type we don't support
ErrInvalidMessageType = errors.New("invalid Message Type")
// ErrExpectedAndActualLengthMismatch is when the declared length and actual length don't match
ErrExpectedAndActualLengthMismatch = errors.New("expected and actual length do not match")
// ErrUnexpectedDataChannelType is when a message type does not match the expected type
ErrUnexpectedDataChannelType = errors.New("expected and actual message type does not match")
)

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server/vendor/github.com/pion/datachannel/message.go generated vendored Normal file
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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
package datachannel
import (
"fmt"
)
// message is a parsed DataChannel message
type message interface {
Marshal() ([]byte, error)
Unmarshal([]byte) error
String() string
}
// messageType is the first byte in a DataChannel message that specifies type
type messageType byte
// DataChannel Message Types
const (
dataChannelAck messageType = 0x02
dataChannelOpen messageType = 0x03
)
func (t messageType) String() string {
switch t {
case dataChannelAck:
return "DataChannelAck"
case dataChannelOpen:
return "DataChannelOpen"
default:
return fmt.Sprintf("Unknown MessageType: %d", t)
}
}
// parse accepts raw input and returns a DataChannel message
func parse(raw []byte) (message, error) {
if len(raw) == 0 {
return nil, ErrDataChannelMessageTooShort
}
var msg message
switch messageType(raw[0]) {
case dataChannelOpen:
msg = &channelOpen{}
case dataChannelAck:
msg = &channelAck{}
default:
return nil, fmt.Errorf("%w %v", ErrInvalidMessageType, messageType(raw[0]))
}
if err := msg.Unmarshal(raw); err != nil {
return nil, err
}
return msg, nil
}
// parseExpectDataChannelOpen parses a DataChannelOpen message
// or throws an error
func parseExpectDataChannelOpen(raw []byte) (*channelOpen, error) {
if len(raw) == 0 {
return nil, ErrDataChannelMessageTooShort
}
if actualTyp := messageType(raw[0]); actualTyp != dataChannelOpen {
return nil, fmt.Errorf("%w expected(%s) actual(%s)", ErrUnexpectedDataChannelType, actualTyp, dataChannelOpen)
}
msg := &channelOpen{}
if err := msg.Unmarshal(raw); err != nil {
return nil, err
}
return msg, nil
}
// TryMarshalUnmarshal attempts to marshal and unmarshal a message. Added for fuzzing.
func TryMarshalUnmarshal(msg []byte) int {
message, err := parse(msg)
if err != nil {
return 0
}
_, err = message.Marshal()
if err != nil {
return 0
}
return 1
}

29
server/vendor/github.com/pion/datachannel/message_channel_ack.go generated vendored Normal file
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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
package datachannel
// channelAck is used to ACK a DataChannel open
type channelAck struct{}
const (
channelOpenAckLength = 4
)
// Marshal returns raw bytes for the given message
func (c *channelAck) Marshal() ([]byte, error) {
raw := make([]byte, channelOpenAckLength)
raw[0] = uint8(dataChannelAck)
return raw, nil
}
// Unmarshal populates the struct with the given raw data
func (c *channelAck) Unmarshal(_ []byte) error {
// Message type already checked in Parse and there is no further data
return nil
}
func (c channelAck) String() string {
return "ACK"
}

147
server/vendor/github.com/pion/datachannel/message_channel_open.go generated vendored Normal file
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@@ -0,0 +1,147 @@
// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
package datachannel
import (
"encoding/binary"
"fmt"
)
/*
channelOpen represents a DATA_CHANNEL_OPEN Message
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type | Channel Type | Priority |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reliability Parameter |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Label Length | Protocol Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Label |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Protocol |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
type channelOpen struct {
ChannelType ChannelType
Priority uint16
ReliabilityParameter uint32
Label []byte
Protocol []byte
}
const (
channelOpenHeaderLength = 12
)
// ChannelType determines the reliability of the WebRTC DataChannel
type ChannelType byte
// ChannelType enums
const (
// ChannelTypeReliable determines the Data Channel provides a
// reliable in-order bi-directional communication.
ChannelTypeReliable ChannelType = 0x00
// ChannelTypeReliableUnordered determines the Data Channel
// provides a reliable unordered bi-directional communication.
ChannelTypeReliableUnordered ChannelType = 0x80
// ChannelTypePartialReliableRexmit determines the Data Channel
// provides a partially-reliable in-order bi-directional communication.
// User messages will not be retransmitted more times than specified in the Reliability Parameter.
ChannelTypePartialReliableRexmit ChannelType = 0x01
// ChannelTypePartialReliableRexmitUnordered determines
// the Data Channel provides a partial reliable unordered bi-directional communication.
// User messages will not be retransmitted more times than specified in the Reliability Parameter.
ChannelTypePartialReliableRexmitUnordered ChannelType = 0x81
// ChannelTypePartialReliableTimed determines the Data Channel
// provides a partial reliable in-order bi-directional communication.
// User messages might not be transmitted or retransmitted after
// a specified life-time given in milli- seconds in the Reliability Parameter.
// This life-time starts when providing the user message to the protocol stack.
ChannelTypePartialReliableTimed ChannelType = 0x02
// The Data Channel provides a partial reliable unordered bi-directional
// communication. User messages might not be transmitted or retransmitted
// after a specified life-time given in milli- seconds in the Reliability Parameter.
// This life-time starts when providing the user message to the protocol stack.
ChannelTypePartialReliableTimedUnordered ChannelType = 0x82
)
func (c ChannelType) String() string {
switch c {
case ChannelTypeReliable:
case ChannelTypeReliableUnordered:
return "ReliableUnordered"
case ChannelTypePartialReliableRexmit:
return "PartialReliableRexmit"
case ChannelTypePartialReliableRexmitUnordered:
return "PartialReliableRexmitUnordered"
case ChannelTypePartialReliableTimed:
return "PartialReliableTimed"
case ChannelTypePartialReliableTimedUnordered:
return "PartialReliableTimedUnordered"
}
return "Unknown"
}
// ChannelPriority enums
const (
ChannelPriorityBelowNormal uint16 = 128
ChannelPriorityNormal uint16 = 256
ChannelPriorityHigh uint16 = 512
ChannelPriorityExtraHigh uint16 = 1024
)
// Marshal returns raw bytes for the given message
func (c *channelOpen) Marshal() ([]byte, error) {
labelLength := len(c.Label)
protocolLength := len(c.Protocol)
totalLen := channelOpenHeaderLength + labelLength + protocolLength
raw := make([]byte, totalLen)
raw[0] = uint8(dataChannelOpen)
raw[1] = byte(c.ChannelType)
binary.BigEndian.PutUint16(raw[2:], c.Priority)
binary.BigEndian.PutUint32(raw[4:], c.ReliabilityParameter)
binary.BigEndian.PutUint16(raw[8:], uint16(labelLength))
binary.BigEndian.PutUint16(raw[10:], uint16(protocolLength))
endLabel := channelOpenHeaderLength + labelLength
copy(raw[channelOpenHeaderLength:endLabel], c.Label)
copy(raw[endLabel:endLabel+protocolLength], c.Protocol)
return raw, nil
}
// Unmarshal populates the struct with the given raw data
func (c *channelOpen) Unmarshal(raw []byte) error {
if len(raw) < channelOpenHeaderLength {
return fmt.Errorf("%w expected(%d) actual(%d)", ErrExpectedAndActualLengthMismatch, channelOpenHeaderLength, len(raw))
}
c.ChannelType = ChannelType(raw[1])
c.Priority = binary.BigEndian.Uint16(raw[2:])
c.ReliabilityParameter = binary.BigEndian.Uint32(raw[4:])
labelLength := binary.BigEndian.Uint16(raw[8:])
protocolLength := binary.BigEndian.Uint16(raw[10:])
if expectedLen := channelOpenHeaderLength + int(labelLength) + int(protocolLength); len(raw) != expectedLen {
return fmt.Errorf("%w expected(%d) actual(%d)", ErrExpectedAndActualLengthMismatch, expectedLen, len(raw))
}
c.Label = raw[channelOpenHeaderLength : channelOpenHeaderLength+labelLength]
c.Protocol = raw[channelOpenHeaderLength+labelLength : channelOpenHeaderLength+labelLength+protocolLength]
return nil
}
func (c channelOpen) String() string {
return fmt.Sprintf("Open ChannelType(%s) Priority(%v) ReliabilityParameter(%d) Label(%s) Protocol(%s)", c.ChannelType, c.Priority, c.ReliabilityParameter, string(c.Label), string(c.Protocol))
}

6
server/vendor/github.com/pion/datachannel/renovate.json generated vendored Normal file
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{
"$schema": "https://docs.renovatebot.com/renovate-schema.json",
"extends": [
"github>pion/renovate-config"
]
}