mirror of
https://github.com/fluffle/goirc
synced 2025-11-03 19:48:04 +00:00
Ragel based config file parser, ftw.
This commit is contained in:
Alex Bramley
parent
377fbcd3af
commit
22ccce6bb2
9 changed files with 250 additions and 366 deletions
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@ -7,11 +7,10 @@ include $(GOROOT)/src/Make.inc
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TARG=irc/server/config
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GOFILES=\
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config.go\
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port.go\
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oper.go\
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link.go\
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ban.go\
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info.go\
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settings.go\
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parser.go\
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include $(GOROOT)/src/Make.pkg
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parser.go: parser.rl
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ragel -Z -G2 -o parser.go parser.rl
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@ -1,33 +0,0 @@
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package config
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type cBan interface {
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Match(string) bool
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Reason() string
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}
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// G-Line etc;
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type cBanNick struct {
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NickMask string // nick!ident@host
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Reason string
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}
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// Z-Line
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type cBanIP struct {
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Address string // ip (or hostname), plus optional CIDR netmask
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Reason string
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ip string // parsed into these
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cidr int
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}
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// CTCP version ban
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type cBanVersion struct {
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VersionRegex string // regex to match against version reply
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Reason string
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}
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// Ban server from linking to network
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type cBanServer struct {
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ServerMask string // matched against name of linked server
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Reason string
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}
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@ -1,16 +1,14 @@
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package config
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import (
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"io"
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"os"
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"fmt"
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"strconv"
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"scanner"
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"net"
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"strings"
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)
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type Config struct {
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fn string
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scan *scanner.Scanner
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// Ports we listen on.
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Ports map[int]*cPort
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@ -31,17 +29,6 @@ type Config struct {
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Errors []os.Error
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}
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type configMap map[string]func(*Config)
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type keywordMap map[string]func(*Config, interface{})
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var configKeywords = configMap{
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"port": (*Config).parsePort,
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"oper": (*Config).parseOper,
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// "link": (*Config).parseLink,
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// "ban": (*Config).parseBan,
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// "info": (*Config).parseInfo,
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// "set": (*Config).parseSettings,
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}
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func LoadConfig(filename string) *Config {
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conf := &Config{fn: filename}
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@ -74,103 +61,129 @@ func (conf *Config) Rehash() {
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}
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}
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func (conf *Config) Parse(io io.Reader) {
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s := &scanner.Scanner{}
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s.Init(io)
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s.Filename = conf.fn
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conf.scan = s
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tok, text := conf.next()
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for tok != scanner.EOF {
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// This external loop should only parse Config things
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if f, ok := configKeywords[text]; ok {
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f(conf)
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} else {
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conf.parseError("Invalid top-level keyword '%s'", text)
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/* Port configuration */
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type cPort struct {
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Port int
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BindIP net.IP // bind to a specific IP for listen port
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Class string // "server" or "client"
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// Is port a tls.Listener? Does it support compression (no)?
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SSL, Zip bool
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}
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func defaultPort() *cPort {
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return &cPort{
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BindIP: nil, Class: "client",
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SSL: false, Zip: false,
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}
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}
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func (p *cPort) String() string {
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str := []string{fmt.Sprintf("port %d {", p.Port)}
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if p.BindIP != nil {
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str = append(str,
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fmt.Sprintf("\tbind_ip = %s", p.BindIP.String()))
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}
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str = append(str,
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fmt.Sprintf("\tclass = %s", p.Class),
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fmt.Sprintf("\tssl = %t", p.SSL),
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fmt.Sprintf("\tzip = %t", p.Zip),
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"}",
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)
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return strings.Join(str, "\n")
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}
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/* Oper configuration */
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type cOper struct {
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Username, Password string
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HostMask []string
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// Permissions for oper
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CanKill, CanBan, CanRenick, CanLink bool
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}
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func defaultOper() *cOper {
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return &cOper{
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HostMask: []string{},
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CanKill: true, CanBan: true,
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CanRenick: false, CanLink: false,
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}
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}
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func (o *cOper) String() string {
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str := []string{fmt.Sprintf("oper %s {", o.Username)}
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str = append(str, fmt.Sprintf("\tpassword = %s", o.Password))
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if len(o.HostMask) == 0 {
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str = append(str, fmt.Sprintf("\thostmask = *@*"))
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} else {
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for _, h := range o.HostMask {
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str = append(str, fmt.Sprintf("\thostmask = %s", h))
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}
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fmt.Printf("Token: '%s', type %s\n", s.TokenText(), scanner.TokenString(tok))
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tok, text = conf.next()
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}
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str = append(str,
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fmt.Sprintf("\tkill = %t", o.CanKill),
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fmt.Sprintf("\tban = %t", o.CanBan),
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fmt.Sprintf("\trenick = %t", o.CanRenick),
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fmt.Sprintf("\tlink = %t", o.CanLink),
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"}",
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)
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return strings.Join(str, "\n")
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}
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func (conf *Config) parseKwBlock(dst interface{}, bt string, kw keywordMap) {
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if ok := conf.expect("{"); !ok {
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conf.parseError("Expected %s configuration block.", bt)
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return
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}
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tok, text := conf.next()
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for tok != scanner.EOF {
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if f, ok := kw[text]; ok {
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if ok = conf.expect("="); ok {
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f(conf, dst)
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}
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} else if text == "}" {
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break
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} else {
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conf.parseError("Invalid %s keyword '%s'", bt, text)
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}
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tok, text = conf.next()
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}
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/* Link configuration */
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type cLink struct {
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Server string // Server name for link
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Address string // {ip,ip6,host}:port
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ReceivePass string // Password when server connects to us
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ConnectPass string // Password when we connect to server
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// Do we use tls.Dial? or compression (no)? Do we auto-connect on start?
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SSL, Zip, Auto bool
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}
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var booleans = map[string]bool {
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"true": true,
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"yes": true,
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"on": true,
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"1": true,
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"false": false,
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"no": false,
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"off": false,
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"0": false,
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/* Static ban configuration */
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type cBan interface {
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Match(string) bool
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Reason() string
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}
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func (conf *Config) expectBool() (bool, bool) {
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tok, text := conf.next()
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if val, ok := booleans[text]; tok == scanner.Ident && ok {
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return val, ok
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}
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conf.parseError("Expected boolean, got '%s'", text)
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return false, false
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// G-Line etc;
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type cBanNick struct {
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NickMask string // nick!ident@host
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Reason string
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}
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func (conf *Config) expectInt() (int, bool) {
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tok, text := conf.next()
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num, err := strconv.Atoi(text)
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if tok != scanner.Int || err != nil {
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conf.parseError("Expected integer, got '%s'", text)
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return 0, false
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}
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return num, true
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// Z-Line
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type cBanIP struct {
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Address string // ip (or hostname), plus optional CIDR netmask
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Reason string
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ip string // parsed into these
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cidr int
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}
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func (conf *Config) expectString() (string, bool) {
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tok, text := conf.next()
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if tok != scanner.String && tok != scanner.Ident {
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conf.parseError("Expected string, got '%s'", text)
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return "", false
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}
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return text, true
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// CTCP version ban
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type cBanVersion struct {
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VersionRegex string // regex to match against version reply
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Reason string
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}
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func (conf *Config) expect(str string) bool {
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_, text := conf.next()
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if text != str {
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conf.parseError("Expected '%s', got '%s'", str, text)
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return false
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}
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return true
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// Ban server from linking to network
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type cBanServer struct {
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ServerMask string // matched against name of linked server
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Reason string
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}
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func (conf *Config) next() (int, string) {
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tok := conf.scan.Scan()
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text := conf.scan.TokenText()
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if tok == scanner.String {
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// drop "quotes" -> quotes
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text = text[1:len(text)-1]
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}
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return tok, text
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/* IRCd settings */
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type cSettings struct {
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SSLKey, SSLCert, SSLCACert string
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MaxChans, MaxConnsPerIP int
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LogFile string
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}
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func (conf *Config) parseError(err string, args ...interface{}) {
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err = conf.scan.Pos().String() + ": " + err
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conf.Errors = append(conf.Errors, os.NewError(fmt.Sprintf(err, args...)))
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/* IRCd information */
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type cInfo struct {
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Name, Network, Info, MOTDFile string
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Admins []string
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Numeric int
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}
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@ -1,8 +0,0 @@
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package config
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type cInfo struct {
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Name, Network, Info, MOTDFile string
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Admins []string
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Numeric int
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}
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@ -1,12 +0,0 @@
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package config
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type cLink struct {
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Server string // Server name for link
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Address string // {ip,ip6,host}:port
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ReceivePass string // Password when server connects to us
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ConnectPass string // Password when we connect to server
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// Do we use tls.Dial? or compression (no)? Do we auto-connect on start?
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SSL, Zip, Auto bool
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}
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@ -1,106 +0,0 @@
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package config
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import (
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"fmt"
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"strings"
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"scanner"
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)
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type cOper struct {
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Username, Password string
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HostMask []string
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// Permissions for oper
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CanKill, CanBan, CanRenick, CanLink bool
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}
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var operKeywords = keywordMap{
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"password": (*Config).parseOperPassword,
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"hostmask": (*Config).parseOperHostMask,
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"kill": (*Config).parseOperKill,
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"ban": (*Config).parseOperBan,
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"renick": (*Config).parseOperRenick,
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"link": (*Config).parseOperLink,
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}
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func defaultOper() *cOper {
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return &cOper{
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HostMask: []string{},
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CanKill: true, CanBan: true,
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CanRenick: false, CanLink: false,
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}
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}
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func (o *cOper) String() string {
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str := []string{fmt.Sprintf("oper \"%s\" {", o.Username)}
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str = append(str, fmt.Sprintf("\tpassword = \"%s\"", o.Password))
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if len(o.HostMask) == 0 {
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str = append(str, fmt.Sprintf("\thostmask = \"*@*\""))
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} else {
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for _, h := range o.HostMask {
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str = append(str, fmt.Sprintf("\thostmask = \"%s\"", h))
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}
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}
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str = append(str,
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fmt.Sprintf("\tkill = %t", o.CanKill),
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fmt.Sprintf("\tban = %t", o.CanBan),
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fmt.Sprintf("\trenick = %t", o.CanRenick),
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fmt.Sprintf("\tlink = %t", o.CanLink),
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"}",
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)
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return strings.Join(str, "\n")
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}
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func (conf *Config) parseOper() {
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oper := defaultOper()
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tok, text := conf.next()
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if tok != scanner.String && tok != scanner.Ident {
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conf.parseError("Invalid username '%s'", text)
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return
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}
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oper.Username = text
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conf.parseKwBlock(oper, "oper", operKeywords)
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fmt.Println(oper.String())
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}
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func (conf *Config) parseOperPassword(oi interface{}) {
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oper := oi.(*cOper)
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if pass, ok := conf.expectString(); ok {
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oper.Password = pass
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}
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}
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func (conf *Config) parseOperHostMask(oi interface{}) {
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oper := oi.(*cOper)
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if mask, ok := conf.expectString(); ok {
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oper.HostMask = append(oper.HostMask, mask)
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}
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}
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func (conf *Config) parseOperKill(oi interface{}) {
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oper := oi.(*cOper)
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if kill, ok := conf.expectBool(); ok {
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oper.CanKill = kill
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}
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}
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func (conf *Config) parseOperBan(oi interface{}) {
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oper := oi.(*cOper)
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if ban, ok := conf.expectBool(); ok {
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oper.CanBan = ban
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}
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}
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func (conf *Config) parseOperRenick(oi interface{}) {
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oper := oi.(*cOper)
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if renick, ok := conf.expectBool(); ok {
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oper.CanRenick = renick
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}
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}
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func (conf *Config) parseOperLink(oi interface{}) {
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oper := oi.(*cOper)
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if link, ok := conf.expectBool(); ok {
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oper.CanLink = link
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}
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}
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136
server/config/parser.rl
Normal file
136
server/config/parser.rl
Normal file
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@ -0,0 +1,136 @@
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package config
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import (
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"io"
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"os"
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"fmt"
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"net"
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"strconv"
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)
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%% machine config;
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%% write data;
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var booleans = map[string]bool {
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"true": true,
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"yes": true,
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"on": true,
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"1": true,
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"false": false,
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"no": false,
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"off": false,
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"0": false,
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}
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%%{
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# mark the current position for acquiring data
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action mark { mark = p }
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# acceptable boolean values
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true = "yes" | "on" | "1" | "true" ;
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false = "no" | "off" | "0" | "false" ;
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boolean = true | false ;
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# IP addresses, v4 and v6
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octet = digit # 0-9
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| digit digit # 00-99
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| [01] digit digit # 000-199
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| "2" [0-4] digit # 200-249
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| "2" "5" [0-5] ; # 250-255
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ipv4addr = octet "." octet "." octet "." octet ;
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ipv6addr = ( xdigit{1,4} ":" ){7} xdigit{1,4} # all 8 blocks
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| xdigit{0,4} "::" # special case
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| ( xdigit{1,4} ":" ){1,6} ":" # first 1-6, ::
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| ":" ( ":" xdigit{1,4} ){1,6} # ::, final 1-6
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| xdigit{1,4} ":" ( ":" xdigit{1,4} ){1,6} # 1::1-6
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| ( xdigit{1,4} ":" ){2}( ":" xdigit{1,4} ){1,5} # 2::1-5
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| ( xdigit{1,4} ":" ){3}( ":" xdigit{1,4} ){1,4} # 3::1-4
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| ( xdigit{1,4} ":" ){4}( ":" xdigit{1,4} ){1,5} # 4::1-3
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| ( xdigit{1,4} ":" ){5}( ":" xdigit{1,4} ){1,2} # 5::1-2
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| ( xdigit{1,4} ":" ){6}( ":" xdigit{1,4} ) ; # 6::1
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# Actions to create a cPort and save it into the Config struct
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action new_port { cur = defaultPort() }
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action save_port {
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port := cur.(*cPort)
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conf.Ports[port.Port] = port
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cur = nil
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}
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# parse and save the port number
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action set_portnum {
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cur.(*cPort).Port, _ = strconv.Atoi(string(data[mark:p]))
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}
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portnum = digit+ >mark %set_portnum ;
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# parse a bind_ip statement and save the IP
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action set_bindip {
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cur.(*cPort).BindIP = net.ParseIP(string(data[mark:p]))
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}
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bindip = (ipv4addr | ipv6addr) >mark %set_bindip ;
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portbindip = "bind_ip" " "+ "=" " "+ bindip ;
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# parse a class statement and save it
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action set_class {
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cur.(*cPort).Class = string(data[mark:p])
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}
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portclass = "class" " "+ "=" " "+ ("server" | "client" >mark %set_class) ;
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# parse SSL and Zip booleans
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action set_ssl {
|
||||
cur.(*cPort).SSL = booleans[string(data[mark:p])]
|
||||
}
|
||||
portssl = "ssl" " "+ "=" " "+ (boolean >mark %set_ssl) ;
|
||||
action set_zip {
|
||||
cur.(*cPort).Zip = booleans[string(data[mark:p])]
|
||||
}
|
||||
portzip = "zip" " "+ "=" " "+ (boolean >mark %set_zip) ;
|
||||
|
||||
portstmt = ( portbindip | portclass | portssl | portzip ) ;
|
||||
portblock = "{" space* ( portstmt | (portstmt " "* "\n" space* )+ ) space* "}" ;
|
||||
|
||||
# a port configuration can either be:
|
||||
# port <portnum>\n
|
||||
# port <portnum> { portblock }
|
||||
basicport = "port" >new_port " "+ portnum " "* "\n" %save_port;
|
||||
portdefn = "port" >new_port " "+ portnum " "+ portblock %save_port ;
|
||||
portconfig = space* ( basicport | portdefn ) space*;
|
||||
|
||||
# config = portconfig+
|
||||
# | operconfig+
|
||||
# | linkconfig*
|
||||
# | infoconfig
|
||||
# | settings ;
|
||||
|
||||
main := portconfig+;
|
||||
}%%
|
||||
|
||||
func (conf *Config) Parse(r io.Reader) {
|
||||
cs, p, mark, pe, eof, buflen := 0, 0, 0, 0, 0, 16384
|
||||
done := false
|
||||
var cur interface{}
|
||||
data := make([]byte, buflen)
|
||||
|
||||
%% write init;
|
||||
|
||||
for !done {
|
||||
n, err := r.Read(data)
|
||||
pe = p + n
|
||||
if err == os.EOF {
|
||||
fmt.Println("yeahhhhh.")
|
||||
done = true
|
||||
eof = pe
|
||||
}
|
||||
|
||||
%% write exec;
|
||||
|
||||
}
|
||||
|
||||
if cs < config_first_final {
|
||||
fmt.Printf("Parse error at %d near '%s'\n", p, data[p:p+10])
|
||||
}
|
||||
|
||||
for _, port := range conf.Ports {
|
||||
fmt.Println(port.String())
|
||||
}
|
||||
}
|
||||
|
|
@ -1,97 +0,0 @@
|
|||
package config
|
||||
|
||||
import (
|
||||
"net"
|
||||
"fmt"
|
||||
"strings"
|
||||
"scanner"
|
||||
)
|
||||
|
||||
type cPort struct {
|
||||
Port int
|
||||
BindIP net.IP // bind to a specific IP for listen port
|
||||
Class string // "server" or "client"
|
||||
|
||||
// Is port a tls.Listener? Does it support compression (no)?
|
||||
SSL, Zip bool
|
||||
}
|
||||
|
||||
var portKeywords = keywordMap{
|
||||
"bind_ip": (*Config).parsePortBindIP,
|
||||
"class": (*Config).parsePortClass,
|
||||
"ssl": (*Config).parsePortSSL,
|
||||
"zip": (*Config).parsePortZip,
|
||||
}
|
||||
|
||||
func defaultPort() *cPort {
|
||||
return &cPort{
|
||||
BindIP: nil, Class: "client",
|
||||
SSL: false, Zip: false,
|
||||
}
|
||||
}
|
||||
|
||||
func (p *cPort) String() string {
|
||||
str := []string{fmt.Sprintf("port %d {", p.Port)}
|
||||
if p.BindIP != nil {
|
||||
str = append(str,
|
||||
fmt.Sprintf("\tbind_ip = \"%s\"", p.BindIP.String()))
|
||||
}
|
||||
str = append(str,
|
||||
fmt.Sprintf("\tclass = \"%s\"", p.Class),
|
||||
fmt.Sprintf("\tssl = %t", p.SSL),
|
||||
fmt.Sprintf("\tzip = %t", p.Zip),
|
||||
"}",
|
||||
)
|
||||
return strings.Join(str, "\n")
|
||||
}
|
||||
|
||||
func (conf *Config) parsePort() {
|
||||
port := defaultPort()
|
||||
portnum, ok := conf.expectInt()
|
||||
if !ok || portnum > 65535 || portnum < 1024 {
|
||||
conf.parseError("Invalid port '%s'", portnum)
|
||||
port = nil
|
||||
} else {
|
||||
port.Port = portnum
|
||||
conf.Ports[portnum] = port
|
||||
}
|
||||
if conf.scan.Peek() != '\n' {
|
||||
conf.parseKwBlock(port, "port", portKeywords)
|
||||
}
|
||||
fmt.Println(port.String())
|
||||
}
|
||||
|
||||
func (conf *Config) parsePortBindIP(pi interface{}) {
|
||||
port := pi.(*cPort)
|
||||
_, text := conf.next()
|
||||
if ip := net.ParseIP(text); ip != nil {
|
||||
port.BindIP = ip
|
||||
} else {
|
||||
conf.parseError("'%s' is not a valid IP address", text)
|
||||
}
|
||||
}
|
||||
|
||||
func (conf *Config) parsePortClass(pi interface{}) {
|
||||
port := pi.(*cPort)
|
||||
tok, text := conf.next()
|
||||
if tok == scanner.String && (text == "server" || text == "client") {
|
||||
port.Class = text
|
||||
} else {
|
||||
conf.parseError(
|
||||
"Port class must be \"server\" or \"client\", got '%s'", text)
|
||||
}
|
||||
}
|
||||
|
||||
func (conf *Config) parsePortSSL(pi interface{}) {
|
||||
port := pi.(*cPort)
|
||||
if ssl, ok := conf.expectBool(); ok {
|
||||
port.SSL = ssl
|
||||
}
|
||||
}
|
||||
|
||||
func (conf *Config) parsePortZip(pi interface{}) {
|
||||
port := pi.(*cPort)
|
||||
if zip, ok := conf.expectBool(); ok {
|
||||
port.Zip = zip
|
||||
}
|
||||
}
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
package config
|
||||
|
||||
type cSettings struct {
|
||||
SSLKey, SSLCert, SSLCACert string
|
||||
MaxChans, MaxConnsPerIP int
|
||||
LogFile string
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue