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)
100 lines
2.4 KiB
Go
100 lines
2.4 KiB
Go
package handler
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import (
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"github.com/renorris/openfsd/protocol"
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"strings"
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)
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// Handler represents a function to process an FSD packet
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type Handler func(invoker Invoker, packet string) (Result, error)
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// New parses the provided packet's identifier and returns a handler function
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func New(packet string) (handler Handler, err error) {
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// Trim packet delimiter and verify length
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if packet = strings.TrimSuffix(packet, protocol.PacketDelimiter); len(packet) < 3 {
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err = protocol.NewGenericFSDError(protocol.SyntaxError, "", "invalid packet: too short")
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return
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}
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fields := strings.Split(packet, protocol.Delimiter)
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switch packet[0] {
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case '^':
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handler = fastPilotPositionHandler
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case '@':
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handler = pilotPositionHandler
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case '$':
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pduID := packet[0:3]
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switch pduID {
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case "$CQ":
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handler = clientQueryHandler
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case "$CR":
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handler = clientQueryResponseHandler
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case "$ZC":
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handler = authChallengeHandler
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case "$ZR":
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handler = authChallengeResponseHandler
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case "$!!":
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handler = killRequestHandler
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case "$PI":
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handler = pingHandler
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case "$AX":
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// TODO: implement METAR request
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}
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case '#':
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pduID := packet[0:3]
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switch pduID {
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case "#SL":
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handler = fastPilotPositionHandler
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case "#ST":
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handler = fastPilotPositionHandler
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case "#DP":
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handler = deletePilotHandler
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case "#SB":
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if len(fields) < 3 {
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err = protocol.NewGenericFSDError(protocol.SyntaxError, "", "unrecognized #SB packet: invalid parameter count")
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return
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}
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switch fields[2] {
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case "PIR":
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handler = planeInfoRequestHandler
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case "FSIPIR":
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handler = planeInfoRequestFsinnHandler
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case "PI":
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if len(fields) > 3 && fields[3] == "GEN" {
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handler = planeInfoResponseHandler
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}
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}
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case "#TM":
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if len(fields) < 3 {
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err = protocol.NewGenericFSDError(protocol.SyntaxError, "", "unrecognized #TM packet: invalid parameter count")
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return
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}
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switch fields[1] {
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case "*":
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handler = broadcastMessageHandler
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case "*S":
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handler = wallopMessageHandler
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default:
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if len(fields[1]) > 0 && fields[1][0] == '@' {
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handler = radioMessageHandler
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} else {
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handler = directMessageHandler
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}
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}
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}
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}
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if handler == nil {
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err = protocol.NewGenericFSDError(protocol.SyntaxError, "", "unrecognized packet type")
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return
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}
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return
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}
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func pduSourceInvalidResult() (result Result, err error) {
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err = protocol.NewGenericFSDError(protocol.PDUSourceInvalidError, "", "")
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return
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}
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