mirror of
https://github.com/renorris/openfsd
synced 2026-03-22 23:05:36 +08:00
57d54d6705
Changes:
- Implement bootstrapping library for managing several concurrent internal services
- Refactor concurrency model for connections/logical clients and their associated I/O
- Refactor server context singleton
- Refactor error handling
- Most errors are now gracefully sent to the FSD client directly encoded as an $ER packet,
enhancing visibility and debugging
- Most errors are now rightfully treated as non-fatal
- Refactor package/dependency graph
- Refactor calling conventions/interfaces for many packages
- Refactor database package
- Refactor post office
Features:
- Add VATSIM-esque HTTP/JSON "data feed"
- Add ephemeral in-memory database option
- Add user management REST API
- Add improved web interface
- Add MySQL support (drop SQLite support)
89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
package protocol
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
type ClientIdentificationPDU struct {
|
|
From string `validate:"required,alphanum,max=16"`
|
|
To string `validate:"required,alphanum,max=16"`
|
|
ClientID uint16 `validate:"required"`
|
|
ClientName string `validate:"required,max=32"`
|
|
MajorVersion int `validate:"min=0,max=999"`
|
|
MinorVersion int `validate:"min=0,max=999"`
|
|
CID int `validate:"min=100000,max=9999999"`
|
|
SysUID int `validate:""`
|
|
InitialChallenge string `validate:"required,hexadecimal,min=2,max=32"`
|
|
}
|
|
|
|
func (p *ClientIdentificationPDU) Serialize() string {
|
|
clientIDBytes := make([]byte, 2)
|
|
binary.BigEndian.PutUint16(clientIDBytes, p.ClientID)
|
|
clientIDStr := hex.EncodeToString(clientIDBytes)
|
|
return fmt.Sprintf("$ID%s:%s:%s:%s:%d:%d:%d:%d:%s%s",
|
|
p.From, p.To, clientIDStr, p.ClientName, p.MajorVersion,
|
|
p.MinorVersion, p.CID, p.SysUID, p.InitialChallenge, PacketDelimiter)
|
|
}
|
|
|
|
func (p *ClientIdentificationPDU) Parse(packet string) error {
|
|
packet = strings.TrimSuffix(packet, PacketDelimiter)
|
|
packet = strings.TrimPrefix(packet, "$ID")
|
|
|
|
var fields []string
|
|
if fields = strings.Split(packet, Delimiter); len(fields) != 9 {
|
|
return NewGenericFSDError(SyntaxError, "", "invalid parameter count")
|
|
}
|
|
|
|
pdu := ClientIdentificationPDU{
|
|
From: fields[0],
|
|
To: fields[1],
|
|
ClientName: fields[3],
|
|
InitialChallenge: fields[8],
|
|
}
|
|
|
|
// fields[2] == uint16 in hexadecimal
|
|
if len(fields[2]) != 4 {
|
|
return NewGenericFSDError(SyntaxError, fields[2],
|
|
"client ID must be 4 hexadecimal characters")
|
|
}
|
|
|
|
var clientIDBytes []byte
|
|
var err error
|
|
if clientIDBytes, err = hex.DecodeString(fields[2]); err != nil || len(clientIDBytes) != 2 {
|
|
return NewGenericFSDError(SyntaxError, fields[2], "invalid client ID")
|
|
}
|
|
pdu.ClientID = binary.BigEndian.Uint16(clientIDBytes)
|
|
|
|
if pdu.MajorVersion, err = strconv.Atoi(fields[4]); err != nil {
|
|
return NewGenericFSDError(SyntaxError, fields[4], "invalid major version")
|
|
}
|
|
|
|
if pdu.MinorVersion, err = strconv.Atoi(fields[5]); err != nil {
|
|
return NewGenericFSDError(SyntaxError, fields[5], "invalid minor version")
|
|
}
|
|
|
|
if pdu.CID, err = strconv.Atoi(fields[6]); err != nil {
|
|
return NewGenericFSDError(SyntaxError, fields[6], "invalid CID")
|
|
}
|
|
|
|
if pdu.SysUID, err = strconv.Atoi(fields[7]); err != nil {
|
|
return NewGenericFSDError(SyntaxError, fields[7], "invalid system UID")
|
|
}
|
|
|
|
if err = V.Struct(&pdu); err != nil {
|
|
if validatorErr := getFSDErrorFromValidatorErrors(err); err != nil {
|
|
return validatorErr
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Copy new pdu into receiver
|
|
*p = pdu
|
|
|
|
return nil
|
|
}
|