mirror of
https://github.com/renorris/openfsd
synced 2026-03-22 14:35:36 +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
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import (
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"encoding/binary"
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"encoding/hex"
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"fmt"
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"strconv"
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"strings"
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)
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type ClientIdentificationPDU struct {
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From string `validate:"required,alphanum,max=16"`
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To string `validate:"required,alphanum,max=16"`
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ClientID uint16 `validate:"required"`
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ClientName string `validate:"required,max=32"`
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MajorVersion int `validate:"min=0,max=999"`
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MinorVersion int `validate:"min=0,max=999"`
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CID int `validate:"min=100000,max=9999999"`
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SysUID int `validate:""`
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InitialChallenge string `validate:"required,hexadecimal,min=2,max=32"`
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}
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func (p *ClientIdentificationPDU) Serialize() string {
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clientIDBytes := make([]byte, 2)
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binary.BigEndian.PutUint16(clientIDBytes, p.ClientID)
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clientIDStr := hex.EncodeToString(clientIDBytes)
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return fmt.Sprintf("$ID%s:%s:%s:%s:%d:%d:%d:%d:%s%s",
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p.From, p.To, clientIDStr, p.ClientName, p.MajorVersion,
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p.MinorVersion, p.CID, p.SysUID, p.InitialChallenge, PacketDelimiter)
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}
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func (p *ClientIdentificationPDU) Parse(packet string) error {
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packet = strings.TrimSuffix(packet, PacketDelimiter)
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packet = strings.TrimPrefix(packet, "$ID")
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var fields []string
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if fields = strings.Split(packet, Delimiter); len(fields) != 9 {
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return NewGenericFSDError(SyntaxError, "", "invalid parameter count")
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}
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pdu := ClientIdentificationPDU{
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From: fields[0],
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To: fields[1],
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ClientName: fields[3],
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InitialChallenge: fields[8],
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}
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// fields[2] == uint16 in hexadecimal
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if len(fields[2]) != 4 {
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return NewGenericFSDError(SyntaxError, fields[2],
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"client ID must be 4 hexadecimal characters")
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}
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var clientIDBytes []byte
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var err error
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if clientIDBytes, err = hex.DecodeString(fields[2]); err != nil || len(clientIDBytes) != 2 {
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return NewGenericFSDError(SyntaxError, fields[2], "invalid client ID")
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}
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pdu.ClientID = binary.BigEndian.Uint16(clientIDBytes)
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if pdu.MajorVersion, err = strconv.Atoi(fields[4]); err != nil {
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return NewGenericFSDError(SyntaxError, fields[4], "invalid major version")
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}
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if pdu.MinorVersion, err = strconv.Atoi(fields[5]); err != nil {
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return NewGenericFSDError(SyntaxError, fields[5], "invalid minor version")
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}
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if pdu.CID, err = strconv.Atoi(fields[6]); err != nil {
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return NewGenericFSDError(SyntaxError, fields[6], "invalid CID")
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}
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if pdu.SysUID, err = strconv.Atoi(fields[7]); err != nil {
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return NewGenericFSDError(SyntaxError, fields[7], "invalid system UID")
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}
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if err = V.Struct(&pdu); err != nil {
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if validatorErr := getFSDErrorFromValidatorErrors(err); err != nil {
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return validatorErr
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}
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return err
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}
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// Copy new pdu into receiver
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*p = pdu
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return nil
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}
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