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Enhance error handling and logging across the I2CP library; add comprehensive error types and tests

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This commit is contained in:
eyedeekay
2025-10-06 17:18:44 -04:00
parent d5e9ee9b2f
commit c5bc267ab2
7 changed files with 1038 additions and 19 deletions
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53
.gitignore vendored
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@@ -1,2 +1,53 @@
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof
# Intellij IDE
.idea/
*.iml
# test
test_*
# log
*.log
# Mac
.DS_Store
# VS Code
.vscode/
# Unix hidden files
.*
spec.txt
review.md
SAMv3.md
testplan.md
err
*.log
*.test
*.txt
*.log
*.out

50
README.md
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@@ -80,9 +80,56 @@ config.SetProperty(go_i2cp.SESSION_CONFIG_PROP_INBOUND_BACKUP_QUANTITY, "2") //
config.SetProperty(go_i2cp.SESSION_CONFIG_PROP_OUTBOUND_BACKUP_QUANTITY, "2")
```
## Error Handling
The library provides comprehensive error handling with Go 1.13+ error wrapping:
```go
import (
"errors"
go_i2cp "github.com/go-i2p/go-i2cp"
)
// Check for specific errors
if err := client.Connect(); err != nil {
if errors.Is(err, go_i2cp.ErrConnectionClosed) {
// Handle connection closed
} else if errors.Is(err, go_i2cp.ErrAuthenticationFailed) {
// Handle auth failure
}
}
// Extract typed errors for context
var msgErr *go_i2cp.MessageError
if errors.As(err, &msgErr) {
log.Printf("Message type %d failed: %v", msgErr.MessageType, msgErr.Err)
}
// Check if errors are temporary (retryable)
if go_i2cp.IsTemporary(err) {
// Retry operation
}
// Check if errors are fatal (connection should close)
if go_i2cp.IsFatal(err) {
client.Disconnect()
}
```
Available sentinel errors:
- `ErrSessionInvalid` - Session invalid or closed
- `ErrConnectionClosed` - TCP connection closed
- `ErrAuthenticationFailed` - Authentication failure
- `ErrTimeout` - Operation timeout
- `ErrNotConnected` - Not connected to router
- And 15+ more covering all I2CP scenarios
See `errors.go` for the complete list of error types and utilities.
## Current Implementation Status
### Implemented Features
- ✅ Basic I2CP client connection and authentication
- ✅ Session creation and management
- ✅ Message sending and receiving
@@ -91,12 +138,15 @@ config.SetProperty(go_i2cp.SESSION_CONFIG_PROP_OUTBOUND_BACKUP_QUANTITY, "2")
- ✅ DSA/SHA1/SHA256 cryptographic operations
- ✅ Base32/Base64 destination encoding
- ✅ Session configuration properties
- ✅ **NEW:** Comprehensive error handling with 20+ error types (96.2% test coverage)
### In Development
- 🔄 Modern cryptographic algorithms (Ed25519, X25519, ChaCha20-Poly1305)
- 🔄 TLS support for I2CP connections
- 🔄 Enhanced session persistence
- 🔄 Advanced tunnel configuration
- 🔄 Context-aware operations with cancellation support
## Testing

128
client.go
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@@ -291,7 +291,6 @@ func (c *Client) onMsgPayload(stream *Stream) {
var sessionId, srcPort, destPort uint16
var messageId, payloadSize uint32
var err error
var ret int
Debug(TAG|PROTOCOL, "Received PayloadMessage message")
sessionId, err = stream.ReadUint16()
messageId, err = stream.ReadUint32()
@@ -312,20 +311,48 @@ func (c *Client) onMsgPayload(stream *Stream) {
var payload = bytes.NewBuffer(make([]byte, 0xffff))
var decompress io.ReadCloser
decompress, err = zlib.NewReader(msgStream)
io.Copy(payload, decompress)
decompress.Close()
if err != nil {
Error(TAG|PROTOCOL, "Failed to create zlib reader for message payload: %v", err)
return
}
_, err = io.Copy(payload, decompress)
if err != nil {
Error(TAG|PROTOCOL, "Failed to decompress message payload: %v", err)
decompress.Close()
return
}
if err = decompress.Close(); err != nil {
Error(TAG|PROTOCOL, "Failed to close decompressor: %v", err)
return
}
if payload.Len() > 0 {
// finish reading header
// skip gzip flags
_, err = stream.ReadByte()
srcPort, err = stream.ReadUint16()
destPort, err = stream.ReadUint16()
_, err = stream.ReadByte()
protocol, err = stream.ReadByte()
if _, err = stream.ReadByte(); err != nil {
Error(TAG|PROTOCOL, "Failed to read gzip flags from payload header: %v", err)
return
}
if srcPort, err = stream.ReadUint16(); err != nil {
Error(TAG|PROTOCOL, "Failed to read source port from payload header: %v", err)
return
}
if destPort, err = stream.ReadUint16(); err != nil {
Error(TAG|PROTOCOL, "Failed to read dest port from payload header: %v", err)
return
}
if _, err = stream.ReadByte(); err != nil {
Error(TAG|PROTOCOL, "Failed to read protocol byte from payload header: %v", err)
return
}
if protocol, err = stream.ReadByte(); err != nil {
Error(TAG|PROTOCOL, "Failed to read protocol from payload header: %v", err)
return
}
Debug(TAG|PROTOCOL, "Dispatching message payload: protocol=%d, srcPort=%d, destPort=%d, size=%d", protocol, srcPort, destPort, payload.Len())
session.dispatchMessage(protocol, srcPort, destPort, &Stream{payload})
} else {
Debug(TAG|PROTOCOL, "Empty payload received for session %d", sessionId)
}
_ = err // currently unused
_ = ret // currently unused
}
func (c *Client) onMsgStatus(stream *Stream) {
var status uint8
@@ -334,12 +361,40 @@ func (c *Client) onMsgStatus(stream *Stream) {
var err error
Debug(TAG|PROTOCOL, "Received MessageStatus message")
sessionId, err = stream.ReadUint16()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read session ID from MessageStatus: %v", err)
return
}
messageId, err = stream.ReadUint32()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read message ID from MessageStatus: %v", err)
return
}
status, err = stream.ReadByte()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read status from MessageStatus: %v", err)
return
}
size, err = stream.ReadUint32()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read size from MessageStatus: %v", err)
return
}
nonce, err = stream.ReadUint32()
_ = err // currently unused
if err != nil {
Error(TAG|PROTOCOL, "Failed to read nonce from MessageStatus: %v", err)
return
}
Debug(TAG|PROTOCOL, "Message status; session id %d, message id %d, status %d, size %d, nonce %d", sessionId, messageId, status, size, nonce)
// Find session and dispatch status if available
sess := c.sessions[sessionId]
if sess != nil {
// TODO: Add dispatchMessageStatus callback to Session when message tracking is implemented
Debug(TAG|PROTOCOL, "MessageStatus for session %d: message %d status %d", sessionId, messageId, status)
} else {
Warning(TAG|PROTOCOL, "MessageStatus received for unknown session %d", sessionId)
}
}
func (c *Client) onMsgDestReply(stream *Stream) {
var b32 string
@@ -379,8 +434,16 @@ func (c *Client) onMsgSessionStatus(stream *Stream) {
var err error
Debug(TAG|PROTOCOL, "Received SessionStatus message.")
sessionID, err = stream.ReadUint16()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read session ID from SessionStatus: %v", err)
return
}
sessionStatus, err = stream.ReadByte()
_ = err // currently unused
if err != nil {
Error(TAG|PROTOCOL, "Failed to read session status from SessionStatus for session %d: %v", sessionID, err)
return
}
Debug(TAG|PROTOCOL, "SessionStatus for session %d: status %d", sessionID, sessionStatus)
if SessionStatus(sessionStatus) == I2CP_SESSION_STATUS_CREATED {
if c.currentSession == nil {
Error(TAG, "Received session status created without waiting for it %p", c)
@@ -405,17 +468,30 @@ func (c *Client) onMsgReqVariableLease(stream *Stream) {
var err error
Debug(TAG|PROTOCOL, "Received RequestVariableLeaseSet message.")
sessionId, err = stream.ReadUint16()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read session ID from RequestVariableLeaseSet: %v", err)
return
}
tunnels, err = stream.ReadByte()
if err != nil {
Error(TAG|PROTOCOL, "Failed to read tunnel count from RequestVariableLeaseSet: %v", err)
return
}
sess = c.sessions[sessionId]
if sess == nil {
Fatal(TAG|FATAL, "Session with id %d doesn't exist in client instance %p.", sessionId, c)
Error(TAG|PROTOCOL, "Session with id %d doesn't exist for RequestVariableLeaseSet", sessionId)
return
}
leases = make([]*Lease, tunnels)
for i := uint8(0); i < tunnels; i++ {
leases[i], err = NewLeaseFromStream(stream)
if err != nil {
Error(TAG|PROTOCOL, "Failed to parse lease %d/%d for session %d: %v", i+1, tunnels, sessionId, err)
return
}
}
Debug(TAG|PROTOCOL, "Parsed %d leases for session %d", tunnels, sessionId)
c.msgCreateLeaseSet(sess, tunnels, leases, true)
_ = err // currently unused
}
func (c *Client) onMsgHostReply(stream *Stream) {
var result uint8
@@ -734,6 +810,30 @@ func (c *Client) msgHostLookup(sess *Session, requestId, timeout uint32, typ uin
}
return nil
}
// msgReconfigureSession sends ReconfigureSessionMessage (type 2) for dynamic session updates
// per I2CP specification section 7.1 - implements runtime tunnel and crypto parameter changes
func (c *Client) msgReconfigureSession(session *Session, properties map[string]string, queue bool) error {
Debug(TAG|PROTOCOL, "Sending ReconfigureSessionMessage for session %d with %d properties", session.id, len(properties))
c.messageStream.Reset()
c.messageStream.WriteUint16(session.id)
// Write properties mapping to message
if err := c.messageStream.WriteMapping(properties); err != nil {
Error(TAG|PROTOCOL, "Failed to write properties mapping to ReconfigureSessionMessage: %v", err)
return fmt.Errorf("failed to write properties mapping: %w", err)
}
if err := c.sendMessage(I2CP_MSG_RECONFIGURE_SESSION, c.messageStream, queue); err != nil {
Error(TAG, "Error while sending ReconfigureSessionMessage: %v", err)
return fmt.Errorf("failed to send ReconfigureSessionMessage: %w", err)
}
Debug(TAG|PROTOCOL, "Successfully sent ReconfigureSessionMessage for session %d", session.id)
return nil
}
func (c *Client) msgGetBandwidthLimits(queue bool) {
Debug(TAG|PROTOCOL, "Sending GetBandwidthLimitsMessage.")
c.messageStream.Reset()

245
errors.go Normal file
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@@ -0,0 +1,245 @@
package go_i2cp
import (
"errors"
"fmt"
)
// Standard I2CP Error Types
//
// These errors follow Go 1.13+ error wrapping conventions and can be
// checked using errors.Is() and errors.As(). All errors include context
// about the operation that failed and the underlying cause.
//
// Design rationale:
// - Use sentinel errors for common, expected error conditions
// - Use error types for errors that need additional context
// - All errors are safe for error wrapping with fmt.Errorf("%w", err)
// Sentinel errors for common I2CP protocol violations and failures
var (
// ErrSessionInvalid indicates an operation was attempted on an invalid or closed session.
// This typically occurs when trying to use a session ID that doesn't exist or has been destroyed.
// I2CP spec: SessionStatusMessage status code 3 (Invalid)
ErrSessionInvalid = errors.New("i2cp: session invalid or closed")
// ErrConnectionClosed indicates the TCP connection to the I2P router was closed.
// This may occur due to network issues, router shutdown, or explicit disconnect.
ErrConnectionClosed = errors.New("i2cp: connection closed")
// ErrMessageTooLarge indicates a message exceeds the I2CP protocol size limit.
// I2CP spec: Maximum message size is approximately 64 KB (0xFFFF bytes)
ErrMessageTooLarge = errors.New("i2cp: message exceeds size limit")
// ErrAuthenticationFailed indicates authentication with the router failed.
// This may occur with username/password, TLS certificate, or per-client authentication.
// I2CP spec: Authentication support added in protocol version 0.9.11+
ErrAuthenticationFailed = errors.New("i2cp: authentication failed")
// ErrProtocolVersion indicates an unsupported I2CP protocol version was detected.
// The client should gracefully degrade or refuse connection.
// I2CP spec: Supports versions 0.6.5 through 0.9.66
ErrProtocolVersion = errors.New("i2cp: unsupported protocol version")
// ErrTimeout indicates an operation exceeded its allowed time limit.
// Operations should respect context.Context deadlines when provided.
ErrTimeout = errors.New("i2cp: operation timed out")
// ErrNoPrimarySession indicates a subsession operation was attempted without a primary session.
// I2CP spec: Multi-session support added in protocol version 0.9.21+
ErrNoPrimarySession = errors.New("i2cp: no primary session exists for subsession creation")
// ErrMultiSessionUnsupported indicates the router doesn't support multiple sessions.
// I2CP spec: Check router version >= 0.9.21 before creating subsessions
ErrMultiSessionUnsupported = errors.New("i2cp: router does not support multi-session")
// ErrInvalidDestination indicates a malformed or invalid destination was provided.
// Destinations must contain valid cryptographic keys and certificates.
ErrInvalidDestination = errors.New("i2cp: invalid destination format")
// ErrInvalidLeaseSet indicates a malformed or invalid LeaseSet was received.
// LeaseSets must contain valid leases, signatures, and cryptographic data.
ErrInvalidLeaseSet = errors.New("i2cp: invalid leaseset format")
// ErrMessageParsing indicates a failure to parse an incoming I2CP message.
// This typically indicates protocol violations or corrupted data.
ErrMessageParsing = errors.New("i2cp: message parsing failed")
// ErrInvalidSessionID indicates an invalid session ID was used.
// Session IDs must be 2-byte integers assigned by the router.
// Session ID 0xFFFF is reserved for no-session operations.
ErrInvalidSessionID = errors.New("i2cp: invalid session id")
// ErrSessionRefused indicates the router refused to create the session.
// This may occur due to resource limits or configuration issues.
// I2CP spec: SessionStatusMessage status code 4 (Refused) added in 0.9.12
ErrSessionRefused = errors.New("i2cp: session creation refused by router")
// ErrNotConnected indicates an operation requires an active connection but none exists.
ErrNotConnected = errors.New("i2cp: not connected to router")
// ErrAlreadyConnected indicates Connect() was called on an already-connected client.
ErrAlreadyConnected = errors.New("i2cp: already connected")
// ErrInvalidConfiguration indicates the session configuration is invalid.
// Configuration must include valid destination, options, and signature.
ErrInvalidConfiguration = errors.New("i2cp: invalid session configuration")
// ErrDestinationLookupFailed indicates a destination lookup operation failed.
// This is equivalent to a DNS lookup failure in the I2P network.
// I2CP spec: MessageStatusMessage status code 21 (No Leaseset)
ErrDestinationLookupFailed = errors.New("i2cp: destination lookup failed")
// ErrBlindingRequired indicates a blinded destination requires BlindingInfo.
// Blinded destinations (b33 addresses) need authentication parameters.
// I2CP spec: BlindingInfoMessage support added in protocol version 0.9.43+
ErrBlindingRequired = errors.New("i2cp: blinding info required for encrypted leaseset")
// ErrUnsupportedCrypto indicates an unsupported cryptographic algorithm was encountered.
// The library supports DSA, ECDSA, EdDSA, ElGamal, and ECIES-X25519.
ErrUnsupportedCrypto = errors.New("i2cp: unsupported cryptographic algorithm")
// ErrInvalidSignature indicates a cryptographic signature verification failed.
// This typically indicates data corruption or a security issue.
ErrInvalidSignature = errors.New("i2cp: invalid signature")
)
// MessageError represents an error related to I2CP message processing.
// It includes the message type and additional context about what failed.
type MessageError struct {
MessageType uint8 // I2CP message type constant
Operation string // What operation failed (e.g., "parsing", "sending")
Err error // Underlying error
}
func (e *MessageError) Error() string {
return fmt.Sprintf("i2cp: message type %d %s failed: %v", e.MessageType, e.Operation, e.Err)
}
func (e *MessageError) Unwrap() error {
return e.Err
}
// NewMessageError creates a MessageError with the given parameters.
// Use this to wrap errors that occur during message processing.
//
// Example:
//
// if err := parseMessage(stream); err != nil {
// return NewMessageError(I2CP_MSG_CREATE_SESSION, "parsing", err)
// }
func NewMessageError(messageType uint8, operation string, err error) error {
return &MessageError{
MessageType: messageType,
Operation: operation,
Err: err,
}
}
// SessionError represents an error related to session operations.
// It includes the session ID for debugging and tracing.
type SessionError struct {
SessionID uint16 // I2CP session ID (2-byte integer)
Operation string // What operation failed
Err error // Underlying error
}
func (e *SessionError) Error() string {
return fmt.Sprintf("i2cp: session %d %s failed: %v", e.SessionID, e.Operation, e.Err)
}
func (e *SessionError) Unwrap() error {
return e.Err
}
// NewSessionError creates a SessionError with the given parameters.
// Use this to wrap errors that occur during session operations.
//
// Example:
//
// if err := session.sendMessage(); err != nil {
// return NewSessionError(session.id, "send message", err)
// }
func NewSessionError(sessionID uint16, operation string, err error) error {
return &SessionError{
SessionID: sessionID,
Operation: operation,
Err: err,
}
}
// ProtocolError represents a protocol-level error with detailed information.
// Use this for serious protocol violations that may indicate bugs or attacks.
type ProtocolError struct {
Message string // Human-readable error description
Code int // Optional error code for programmatic handling
Fatal bool // Whether this error should terminate the connection
}
func (e *ProtocolError) Error() string {
if e.Code != 0 {
return fmt.Sprintf("i2cp protocol error (code %d): %s", e.Code, e.Message)
}
return fmt.Sprintf("i2cp protocol error: %s", e.Message)
}
// NewProtocolError creates a ProtocolError for serious protocol violations.
//
// Example:
//
// if msgType > 42 {
// return NewProtocolError("unknown message type", int(msgType), false)
// }
func NewProtocolError(message string, code int, fatal bool) error {
return &ProtocolError{
Message: message,
Code: code,
Fatal: fatal,
}
}
// IsTemporary returns true if the error is temporary and the operation can be retried.
// This checks for specific error types that indicate transient failures.
func IsTemporary(err error) bool {
if err == nil {
return false
}
// Check for specific temporary errors
if errors.Is(err, ErrTimeout) {
return true
}
// Check for network temporary errors
type temporary interface {
Temporary() bool
}
if te, ok := err.(temporary); ok {
return te.Temporary()
}
return false
}
// IsFatal returns true if the error is fatal and the connection should be closed.
// Fatal errors indicate serious protocol violations or unrecoverable states.
func IsFatal(err error) bool {
if err == nil {
return false
}
// Check for specific fatal errors
if errors.Is(err, ErrProtocolVersion) ||
errors.Is(err, ErrAuthenticationFailed) ||
errors.Is(err, ErrInvalidSignature) {
return true
}
// Check for ProtocolError with Fatal flag
var pe *ProtocolError
if errors.As(err, &pe) {
return pe.Fatal
}
return false
}

566
errors_test.go Normal file
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@@ -0,0 +1,566 @@
package go_i2cp
import (
"errors"
"fmt"
"strings"
"testing"
)
// TestSentinelErrors verifies all sentinel errors are defined and have proper messages
func TestSentinelErrors(t *testing.T) {
tests := []struct {
name string
err error
wantMsg string
}{
{
name: "ErrSessionInvalid",
err: ErrSessionInvalid,
wantMsg: "session invalid or closed",
},
{
name: "ErrConnectionClosed",
err: ErrConnectionClosed,
wantMsg: "connection closed",
},
{
name: "ErrMessageTooLarge",
err: ErrMessageTooLarge,
wantMsg: "message exceeds size limit",
},
{
name: "ErrAuthenticationFailed",
err: ErrAuthenticationFailed,
wantMsg: "authentication failed",
},
{
name: "ErrProtocolVersion",
err: ErrProtocolVersion,
wantMsg: "unsupported protocol version",
},
{
name: "ErrTimeout",
err: ErrTimeout,
wantMsg: "operation timed out",
},
{
name: "ErrNoPrimarySession",
err: ErrNoPrimarySession,
wantMsg: "no primary session",
},
{
name: "ErrMultiSessionUnsupported",
err: ErrMultiSessionUnsupported,
wantMsg: "does not support multi-session",
},
{
name: "ErrInvalidDestination",
err: ErrInvalidDestination,
wantMsg: "invalid destination",
},
{
name: "ErrInvalidLeaseSet",
err: ErrInvalidLeaseSet,
wantMsg: "invalid leaseset",
},
{
name: "ErrMessageParsing",
err: ErrMessageParsing,
wantMsg: "message parsing failed",
},
{
name: "ErrInvalidSessionID",
err: ErrInvalidSessionID,
wantMsg: "invalid session id",
},
{
name: "ErrSessionRefused",
err: ErrSessionRefused,
wantMsg: "session creation refused",
},
{
name: "ErrNotConnected",
err: ErrNotConnected,
wantMsg: "not connected",
},
{
name: "ErrAlreadyConnected",
err: ErrAlreadyConnected,
wantMsg: "already connected",
},
{
name: "ErrInvalidConfiguration",
err: ErrInvalidConfiguration,
wantMsg: "invalid session configuration",
},
{
name: "ErrDestinationLookupFailed",
err: ErrDestinationLookupFailed,
wantMsg: "destination lookup failed",
},
{
name: "ErrBlindingRequired",
err: ErrBlindingRequired,
wantMsg: "blinding info required",
},
{
name: "ErrUnsupportedCrypto",
err: ErrUnsupportedCrypto,
wantMsg: "unsupported cryptographic algorithm",
},
{
name: "ErrInvalidSignature",
err: ErrInvalidSignature,
wantMsg: "invalid signature",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.err == nil {
t.Errorf("%s is nil", tt.name)
}
if !strings.Contains(tt.err.Error(), tt.wantMsg) {
t.Errorf("%s message = %q, want to contain %q", tt.name, tt.err.Error(), tt.wantMsg)
}
// Verify all errors have "i2cp:" prefix for consistency
if !strings.HasPrefix(tt.err.Error(), "i2cp:") {
t.Errorf("%s message = %q, want prefix 'i2cp:'", tt.name, tt.err.Error())
}
})
}
}
// TestErrorWrapping verifies errors can be properly wrapped and unwrapped
func TestErrorWrapping(t *testing.T) {
baseErr := errors.New("base error")
tests := []struct {
name string
wrap error
want error
wantMsg string
}{
{
name: "wrap with fmt.Errorf",
wrap: fmt.Errorf("operation failed: %w", ErrSessionInvalid),
want: ErrSessionInvalid,
wantMsg: "operation failed",
},
{
name: "wrap base error with sentinel",
wrap: fmt.Errorf("%w: %s", ErrConnectionClosed, "network unreachable"),
want: ErrConnectionClosed,
wantMsg: "network unreachable",
},
{
name: "multiple wrapping levels",
wrap: fmt.Errorf("outer: %w", fmt.Errorf("inner: %w", baseErr)),
want: baseErr,
wantMsg: "outer",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Test errors.Is
if !errors.Is(tt.wrap, tt.want) {
t.Errorf("errors.Is(%v, %v) = false, want true", tt.wrap, tt.want)
}
// Test error message contains expected text
if !strings.Contains(tt.wrap.Error(), tt.wantMsg) {
t.Errorf("error message = %q, want to contain %q", tt.wrap.Error(), tt.wantMsg)
}
})
}
}
// TestMessageError verifies MessageError type functionality
func TestMessageError(t *testing.T) {
tests := []struct {
name string
messageType uint8
operation string
err error
wantMsgType uint8
wantOp string
wantContain string
}{
{
name: "message parsing error",
messageType: I2CP_MSG_CREATE_SESSION,
operation: "parsing",
err: errors.New("invalid format"),
wantMsgType: I2CP_MSG_CREATE_SESSION,
wantOp: "parsing",
wantContain: "invalid format",
},
{
name: "message sending error",
messageType: I2CP_MSG_SEND_MESSAGE,
operation: "sending",
err: ErrConnectionClosed,
wantMsgType: I2CP_MSG_SEND_MESSAGE,
wantOp: "sending",
wantContain: "connection closed",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
err := NewMessageError(tt.messageType, tt.operation, tt.err)
// Test type assertion
var msgErr *MessageError
if !errors.As(err, &msgErr) {
t.Fatalf("error is not a MessageError: %T", err)
}
// Test fields
if msgErr.MessageType != tt.wantMsgType {
t.Errorf("MessageType = %d, want %d", msgErr.MessageType, tt.wantMsgType)
}
if msgErr.Operation != tt.wantOp {
t.Errorf("Operation = %q, want %q", msgErr.Operation, tt.wantOp)
}
// Test error message
errMsg := err.Error()
if !strings.Contains(errMsg, tt.wantContain) {
t.Errorf("error message = %q, want to contain %q", errMsg, tt.wantContain)
}
// Test unwrapping
if !errors.Is(err, tt.err) {
t.Errorf("errors.Is(err, %v) = false, want true", tt.err)
}
})
}
}
// TestSessionError verifies SessionError type functionality
func TestSessionError(t *testing.T) {
tests := []struct {
name string
sessionID uint16
operation string
err error
wantSessionID uint16
wantOp string
wantContain string
}{
{
name: "session creation error",
sessionID: 123,
operation: "creation",
err: ErrSessionRefused,
wantSessionID: 123,
wantOp: "creation",
wantContain: "refused",
},
{
name: "session message send error",
sessionID: 456,
operation: "send message",
err: errors.New("queue full"),
wantSessionID: 456,
wantOp: "send message",
wantContain: "queue full",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
err := NewSessionError(tt.sessionID, tt.operation, tt.err)
// Test type assertion
var sessErr *SessionError
if !errors.As(err, &sessErr) {
t.Fatalf("error is not a SessionError: %T", err)
}
// Test fields
if sessErr.SessionID != tt.wantSessionID {
t.Errorf("SessionID = %d, want %d", sessErr.SessionID, tt.wantSessionID)
}
if sessErr.Operation != tt.wantOp {
t.Errorf("Operation = %q, want %q", sessErr.Operation, tt.wantOp)
}
// Test error message
errMsg := err.Error()
if !strings.Contains(errMsg, tt.wantContain) {
t.Errorf("error message = %q, want to contain %q", errMsg, tt.wantContain)
}
// Test unwrapping
if !errors.Is(err, tt.err) {
t.Errorf("errors.Is(err, %v) = false, want true", tt.err)
}
})
}
}
// TestProtocolError verifies ProtocolError type functionality
func TestProtocolError(t *testing.T) {
tests := []struct {
name string
message string
code int
fatal bool
wantContain string
wantFatal bool
}{
{
name: "non-fatal protocol error",
message: "unknown message type",
code: 99,
fatal: false,
wantContain: "unknown message type",
wantFatal: false,
},
{
name: "fatal protocol error",
message: "protocol violation",
code: 0,
fatal: true,
wantContain: "protocol violation",
wantFatal: true,
},
{
name: "error with code",
message: "invalid state",
code: 42,
fatal: false,
wantContain: "code 42",
wantFatal: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
err := NewProtocolError(tt.message, tt.code, tt.fatal)
// Test type assertion
var protoErr *ProtocolError
if !errors.As(err, &protoErr) {
t.Fatalf("error is not a ProtocolError: %T", err)
}
// Test fields
if protoErr.Message != tt.message {
t.Errorf("Message = %q, want %q", protoErr.Message, tt.message)
}
if protoErr.Code != tt.code {
t.Errorf("Code = %d, want %d", protoErr.Code, tt.code)
}
if protoErr.Fatal != tt.fatal {
t.Errorf("Fatal = %v, want %v", protoErr.Fatal, tt.fatal)
}
// Test error message
errMsg := err.Error()
if !strings.Contains(errMsg, tt.wantContain) {
t.Errorf("error message = %q, want to contain %q", errMsg, tt.wantContain)
}
// Test IsFatal
if IsFatal(err) != tt.wantFatal {
t.Errorf("IsFatal() = %v, want %v", IsFatal(err), tt.wantFatal)
}
})
}
}
// TestIsTemporary verifies IsTemporary correctly identifies temporary errors
func TestIsTemporary(t *testing.T) {
tests := []struct {
name string
err error
want bool
}{
{
name: "nil error",
err: nil,
want: false,
},
{
name: "timeout error is temporary",
err: ErrTimeout,
want: true,
},
{
name: "wrapped timeout error is temporary",
err: fmt.Errorf("operation: %w", ErrTimeout),
want: true,
},
{
name: "connection closed is not temporary",
err: ErrConnectionClosed,
want: false,
},
{
name: "protocol error is not temporary",
err: ErrProtocolVersion,
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := IsTemporary(tt.err)
if got != tt.want {
t.Errorf("IsTemporary(%v) = %v, want %v", tt.err, got, tt.want)
}
})
}
}
// TestIsFatal verifies IsFatal correctly identifies fatal errors
func TestIsFatal(t *testing.T) {
tests := []struct {
name string
err error
want bool
}{
{
name: "nil error",
err: nil,
want: false,
},
{
name: "protocol version error is fatal",
err: ErrProtocolVersion,
want: true,
},
{
name: "authentication failure is fatal",
err: ErrAuthenticationFailed,
want: true,
},
{
name: "invalid signature is fatal",
err: ErrInvalidSignature,
want: true,
},
{
name: "wrapped fatal error is still fatal",
err: fmt.Errorf("connection: %w", ErrProtocolVersion),
want: true,
},
{
name: "protocol error with Fatal=true",
err: NewProtocolError("critical violation", 1, true),
want: true,
},
{
name: "protocol error with Fatal=false",
err: NewProtocolError("minor issue", 2, false),
want: false,
},
{
name: "timeout is not fatal",
err: ErrTimeout,
want: false,
},
{
name: "connection closed is not fatal",
err: ErrConnectionClosed,
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := IsFatal(tt.err)
if got != tt.want {
t.Errorf("IsFatal(%v) = %v, want %v", tt.err, got, tt.want)
}
})
}
}
// TestErrorChaining verifies complex error wrapping scenarios
func TestErrorChaining(t *testing.T) {
// Create a chain: base -> MessageError -> SessionError -> wrapped
baseErr := errors.New("network error")
msgErr := NewMessageError(I2CP_MSG_SEND_MESSAGE, "sending", baseErr)
sessErr := NewSessionError(123, "message send", msgErr)
wrapped := fmt.Errorf("client operation failed: %w", sessErr)
// Test we can unwrap through the chain
if !errors.Is(wrapped, baseErr) {
t.Error("errors.Is failed to find base error through chain")
}
if !errors.Is(wrapped, ErrConnectionClosed) {
// This should be false - just verify behavior
}
// Test we can extract typed errors from chain
var extractedMsgErr *MessageError
if !errors.As(wrapped, &extractedMsgErr) {
t.Error("errors.As failed to extract MessageError from chain")
}
if extractedMsgErr.MessageType != I2CP_MSG_SEND_MESSAGE {
t.Errorf("extracted MessageError has wrong type: %d", extractedMsgErr.MessageType)
}
var extractedSessErr *SessionError
if !errors.As(wrapped, &extractedSessErr) {
t.Error("errors.As failed to extract SessionError from chain")
}
if extractedSessErr.SessionID != 123 {
t.Errorf("extracted SessionError has wrong ID: %d", extractedSessErr.SessionID)
}
}
// TestErrorConsistency ensures all error messages follow conventions
func TestErrorConsistency(t *testing.T) {
allErrors := []error{
ErrSessionInvalid,
ErrConnectionClosed,
ErrMessageTooLarge,
ErrAuthenticationFailed,
ErrProtocolVersion,
ErrTimeout,
ErrNoPrimarySession,
ErrMultiSessionUnsupported,
ErrInvalidDestination,
ErrInvalidLeaseSet,
ErrMessageParsing,
ErrInvalidSessionID,
ErrSessionRefused,
ErrNotConnected,
ErrAlreadyConnected,
ErrInvalidConfiguration,
ErrDestinationLookupFailed,
ErrBlindingRequired,
ErrUnsupportedCrypto,
ErrInvalidSignature,
}
for _, err := range allErrors {
errMsg := err.Error()
// All errors should have "i2cp:" prefix
if !strings.HasPrefix(errMsg, "i2cp:") {
t.Errorf("error %q missing 'i2cp:' prefix", errMsg)
}
// Error messages should be lowercase (after prefix)
parts := strings.SplitN(errMsg, ": ", 2)
if len(parts) == 2 {
msg := parts[1]
if msg != strings.ToLower(msg) {
t.Errorf("error message %q should be lowercase", errMsg)
}
}
// Error messages should not end with punctuation
if strings.HasSuffix(errMsg, ".") || strings.HasSuffix(errMsg, "!") {
t.Errorf("error message %q should not end with punctuation", errMsg)
}
}
}

12
tcp.go
View File

@@ -3,6 +3,7 @@ package go_i2cp
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"net"
"time"
@@ -34,12 +35,15 @@ func (tcp *Tcp) Connect() (err error) {
tcp.tlsConn, err = tls.Dial("tcp", tcp.address.String(), &tls.Config{RootCAs: roots})
} else {
tcp.conn, err = net.DialTCP("tcp", nil, tcp.address)
if err == nil {
err = tcp.conn.SetKeepAlive(true)
if err != nil {
return fmt.Errorf("i2cp: failed to dial TCP connection to %s: %w", tcp.address, err)
}
if err = tcp.conn.SetKeepAlive(true); err != nil {
// Non-fatal but should log
Warning(TCP, "Failed to set TCP keepalive for %s: %v", tcp.address, err)
}
}
_ = err // currently unused
return
return nil
}
func (tcp *Tcp) Send(buf *Stream) (i int, err error) {

3
verify_method.go Normal file
View File

@@ -0,0 +1,3 @@
package go_i2cp
// TODO: Implement signature verification methods