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hid: another round of general code cleanups

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This commit is contained in:
Přemysl Eric Janouch
2018-07-31 23:37:54 +02:00
parent 33969ac86e
commit a6e6c3aaff
1 changed files with 92 additions and 91 deletions
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153
hid/main.go
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@@ -307,7 +307,6 @@ func callSimpleConfigWriteDefault(pathHint string, table []simpleConfigItem) {
// --- Configuration -----------------------------------------------------------
var configTable = []simpleConfigItem{
// TODO: Default to the result from os.Hostname (if successful).
{"server_name", "", "Server name"},
{"server_info", "My server", "Brief server description"},
{"motd", "", "MOTD filename"},
@@ -488,6 +487,8 @@ func ircParseMessage(line string) *message {
}
// --- IRC token validation ----------------------------------------------------
// Everything as per RFC 2812
const (
ircMaxNickname = 9
@@ -1028,21 +1029,20 @@ func (c *client) getTLSCertFingerprint() string {
// --- IRC command handling ----------------------------------------------------
// XXX: ap doesn't really need to be a slice.
func (c *client) makeReply(id int, ap []interface{}) string {
func (c *client) makeReply(id int, ap ...interface{}) string {
s := fmt.Sprintf(":%s %03d %s ", serverName, id, c.nicknameOrStar())
a := fmt.Sprintf(defaultReplies[id], ap...)
return s + a
}
// XXX: This way we cannot typecheck the arguments, so we must be careful.
// XXX: This way we cannot typecheck the arguments, so we should be careful.
func (c *client) sendReply(id int, args ...interface{}) {
c.send(c.makeReply(id, args))
c.send(c.makeReply(id, args...))
}
/// Send a space-separated list of words across as many replies as needed.
func (c *client) sendReplyVector(id int, items []string, args ...interface{}) {
common := c.makeReply(id, args)
common := c.makeReply(id, args...)
// We always send at least one message (there might be a client that
// expects us to send this message at least once).
@@ -1114,8 +1114,7 @@ func (c *client) sendLUSERS() {
c.sendReply(RPL_LUSERME, nUsers+nServices+nUnknown, 0 /* peer servers */)
}
// TODO: Rename back to ircIsThisMe for consistency with kike.
func isThisMe(target string) bool {
func ircIsThisMe(target string) bool {
// Target servers can also be matched by their users
if ircFnmatch(target, serverName) {
return true
@@ -1275,7 +1274,7 @@ var ircCapHandlers = map[string]func(*client, *ircCapArgs){
"END": (*client).handleCAPEND,
}
// XXX: Maybe these also deserve to be methods for client? They operato on
// XXX: Maybe these also deserve to be methods for client? They operate on
// global state, though.
func ircHandleCAP(msg *message, c *client) {
@@ -1418,7 +1417,7 @@ func ircHandleUSERHOST(msg *message, c *client) {
}
func ircHandleLUSERS(msg *message, c *client) {
if len(msg.params) > 1 && !isThisMe(msg.params[1]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[1]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[1])
return
}
@@ -1426,7 +1425,7 @@ func ircHandleLUSERS(msg *message, c *client) {
}
func ircHandleMOTD(msg *message, c *client) {
if len(msg.params) > 0 && !isThisMe(msg.params[0]) {
if len(msg.params) > 0 && !ircIsThisMe(msg.params[0]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[1])
return
}
@@ -1435,7 +1434,7 @@ func ircHandleMOTD(msg *message, c *client) {
func ircHandlePING(msg *message, c *client) {
// XXX: The RFC is pretty incomprehensible about the exact usage.
if len(msg.params) > 1 && !isThisMe(msg.params[1]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[1]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[1])
} else if len(msg.params) < 1 {
c.sendReply(ERR_NOORIGIN)
@@ -1465,7 +1464,7 @@ func ircHandleQUIT(msg *message, c *client) {
}
func ircHandleTIME(msg *message, c *client) {
if len(msg.params) > 0 && !isThisMe(msg.params[0]) {
if len(msg.params) > 0 && !ircIsThisMe(msg.params[0]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[0])
return
}
@@ -1475,7 +1474,7 @@ func ircHandleTIME(msg *message, c *client) {
}
func ircHandleVERSION(msg *message, c *client) {
if len(msg.params) > 0 && !isThisMe(msg.params[0]) {
if len(msg.params) > 0 && !ircIsThisMe(msg.params[0]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[0])
return
}
@@ -1962,7 +1961,7 @@ func ircHandleNOTICE(msg *message, c *client) {
}
func ircHandleLIST(msg *message, c *client) {
if len(msg.params) > 1 && !isThisMe(msg.params[1]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[1]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[1])
return
}
@@ -2013,8 +2012,7 @@ func ircMakeRPLNAMREPLYItem(c, target *client, modes uint) string {
return result
}
// TODO: Consider using *client instead of string as the map key.
func ircSendRPLNAMREPLY(c *client, ch *channel, usedNicks map[string]bool) {
func ircSendRPLNAMREPLY(c *client, ch *channel, usedNicks map[*client]bool) {
kind := '='
if 0 != ch.modes&ircChanModeSecret {
kind = '@'
@@ -2030,17 +2028,17 @@ func ircSendRPLNAMREPLY(c *client, ch *channel, usedNicks map[string]bool) {
continue
}
if usedNicks != nil {
usedNicks[ircToCanon(client.nickname)] = true
usedNicks[client] = true
}
nicks = append(nicks, ircMakeRPLNAMREPLYItem(c, client, modes))
}
c.sendReplyVector(RPL_NAMREPLY, nicks, kind, ch.name, "")
}
func ircSendDisassociatedNames(c *client, usedNicks map[string]bool) {
func ircSendDisassociatedNames(c *client, usedNicks map[*client]bool) {
var nicks []string
for canonNickname, client := range users {
if 0 == client.mode&ircUserModeInvisible && !usedNicks[canonNickname] {
for _, client := range users {
if 0 == client.mode&ircUserModeInvisible && !usedNicks[client] {
nicks = append(nicks, ircMakeRPLNAMREPLYItem(c, client, 0))
}
}
@@ -2050,14 +2048,13 @@ func ircSendDisassociatedNames(c *client, usedNicks map[string]bool) {
}
func ircHandleNAMES(msg *message, c *client) {
if len(msg.params) > 1 && !isThisMe(msg.params[1]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[1]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[1])
return
}
if len(msg.params) == 0 {
usedNicks := make(map[string]bool)
usedNicks := make(map[*client]bool)
for _, ch := range channels {
if _, present := ch.userModes[c]; present ||
0 == ch.modes&(ircChanModePrivate|ircChanModeSecret) {
@@ -2211,7 +2208,7 @@ func ircHandleWHOIS(msg *message, c *client) {
c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
return
}
if len(msg.params) > 1 && !isThisMe(msg.params[0]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[0]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[0])
return
}
@@ -2248,7 +2245,7 @@ func ircHandleWHOWAS(msg *message, c *client) {
c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
return
}
if len(msg.params) > 2 && !isThisMe(msg.params[2]) {
if len(msg.params) > 2 && !ircIsThisMe(msg.params[2]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[2])
return
}
@@ -2283,10 +2280,10 @@ func ircHandleTOPIC(msg *message, c *client) {
return
}
target := msg.params[0]
ch := channels[ircToCanon(target)]
channelName := msg.params[0]
ch := channels[ircToCanon(channelName)]
if ch == nil {
c.sendReply(ERR_NOSUCHCHANNEL, target)
c.sendReply(ERR_NOSUCHCHANNEL, channelName)
return
}
@@ -2297,13 +2294,13 @@ func ircHandleTOPIC(msg *message, c *client) {
modes, present := ch.userModes[c]
if !present {
c.sendReply(ERR_NOTONCHANNEL, target)
c.sendReply(ERR_NOTONCHANNEL, channelName)
return
}
if 0 != ch.modes&ircChanModeProtectedTopic &&
0 == modes&ircChanModeOperator {
c.sendReply(ERR_CHANOPRIVSNEEDED, target)
c.sendReply(ERR_CHANOPRIVSNEEDED, channelName)
return
}
@@ -2312,28 +2309,28 @@ func ircHandleTOPIC(msg *message, c *client) {
ch.topicTime = time.Now()
message := fmt.Sprintf(":%s!%s@%s TOPIC %s :%s",
c.nickname, c.username, c.hostname, target, ch.topic)
c.nickname, c.username, c.hostname, channelName, ch.topic)
ircChannelMulticast(ch, message, nil)
}
func ircTryPart(c *client, target string, reason string) {
func ircTryPart(c *client, channelName string, reason string) {
if reason == "" {
reason = c.nickname
}
ch := channels[ircToCanon(target)]
ch := channels[ircToCanon(channelName)]
if ch == nil {
c.sendReply(ERR_NOSUCHCHANNEL, target)
c.sendReply(ERR_NOSUCHCHANNEL, channelName)
return
}
if _, present := ch.userModes[c]; !present {
c.sendReply(ERR_NOTONCHANNEL, target)
c.sendReply(ERR_NOTONCHANNEL, channelName)
return
}
message := fmt.Sprintf(":%s@%s@%s PART %s :%s",
c.nickname, c.username, c.hostname, target, reason)
c.nickname, c.username, c.hostname, channelName, reason)
if 0 == ch.modes&ircChanModeQuiet {
ircChannelMulticast(ch, message, nil)
} else {
@@ -2363,35 +2360,34 @@ func ircHandlePART(msg *message, c *client) {
reason = msg.params[1]
}
for _, target := range splitString(msg.params[0], ",", true) {
ircTryPart(c, target, reason)
for _, channelName := range splitString(msg.params[0], ",", true) {
ircTryPart(c, channelName, reason)
}
}
// TODO: Undo the rename from channelName to target, also in ircTryPart.
func ircTryKick(c *client, target, nick, reason string) {
ch := channels[ircToCanon(target)]
func ircTryKick(c *client, channelName, nick, reason string) {
ch := channels[ircToCanon(channelName)]
if ch == nil {
c.sendReply(ERR_NOSUCHCHANNEL, target)
c.sendReply(ERR_NOSUCHCHANNEL, channelName)
return
}
if modes, present := ch.userModes[c]; !present {
c.sendReply(ERR_NOTONCHANNEL, target)
c.sendReply(ERR_NOTONCHANNEL, channelName)
return
} else if 0 == modes&ircChanModeOperator {
c.sendReply(ERR_CHANOPRIVSNEEDED, target)
c.sendReply(ERR_CHANOPRIVSNEEDED, channelName)
return
}
client := users[ircToCanon(nick)]
if _, present := ch.userModes[client]; client == nil || !present {
c.sendReply(ERR_USERNOTINCHANNEL, nick, target)
c.sendReply(ERR_USERNOTINCHANNEL, nick, channelName)
return
}
message := fmt.Sprintf(":%s@%s@%s KICK %s %s :%s",
c.nickname, c.username, c.hostname, target, nick, reason)
c.nickname, c.username, c.hostname, channelName, nick, reason)
if 0 == ch.modes&ircChanModeQuiet {
ircChannelMulticast(ch, message, nil)
} else {
@@ -2594,7 +2590,7 @@ func ircHandleISON(msg *message, c *client) {
}
func ircHandleADMIN(msg *message, c *client) {
if len(msg.params) > 0 && !isThisMe(msg.params[0]) {
if len(msg.params) > 0 && !ircIsThisMe(msg.params[0]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[0])
return
}
@@ -2632,7 +2628,7 @@ func ircHandleStatsCommands(c *client) {
}
// We need to do it this way because of an initialization loop concerning
// ircHandlers. Workaround proposed by rsc in #1817.
// ircHandlers. Workaround proposed by rsc in go #1817.
var ircHandleStatsCommandsIndirect func(c *client)
func init() {
@@ -2656,7 +2652,7 @@ func ircHandleSTATS(msg *message, c *client) {
query = msg.params[0][0]
}
if len(msg.params) > 1 && !isThisMe(msg.params[1]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[1]) {
c.sendReply(ERR_NOSUCHSERVER, msg.params[0])
return
}
@@ -2677,7 +2673,7 @@ func ircHandleSTATS(msg *message, c *client) {
}
func ircHandleLINKS(msg *message, c *client) {
if len(msg.params) > 1 && !isThisMe(msg.params[0]) {
if len(msg.params) > 1 && !ircIsThisMe(msg.params[0]) {
c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
return
}
@@ -2729,7 +2725,7 @@ func ircHandleDIE(msg *message, c *client) {
// -----------------------------------------------------------------------------
// TODO: Add an index for IRC_ERR_NOSUCHSERVER validation?
// TODO: Add an index for ERR_NOSUCHSERVER validation?
// TODO: Add a minimal parameter count?
// TODO: Add a field for oper-only commands? Use flags?
var ircHandlers = map[string]*ircCommand{
@@ -2818,7 +2814,7 @@ func (c *client) onPrepared(host string, isTLS bool) {
c.hostname = host
c.address = net.JoinHostPort(host, c.port)
// TODO: If we've tried to send any data before now, we need to flushSendQ.
// If we tried to send any data before now, we would need to flushSendQ.
go read(c)
c.reading = true
}
@@ -2961,7 +2957,6 @@ func prepare(client *client) {
isTLS = detectTLS(sysconn)
}
// FIXME: When the client sends no data, we still initialize its conn.
prepared <- preparedEvent{client, host, isTLS}
}
@@ -3126,52 +3121,58 @@ func ircInitializeMOTD() error {
return scanner.Err()
}
type configError struct {
name string // configuration key
err error // description of the issue
type configProcessor struct {
err error // any error that has occurred so far
}
func (e *configError) Error() string {
return fmt.Sprintf("invalid configuration value for `%s': %s",
e.name, e.err)
func (cp *configProcessor) read(name string, process func(string) string) {
if cp.err != nil {
return
}
if err := process(config[name]); err != "" {
cp.err = fmt.Errorf("invalid configuration value for `%s': %s",
name, err)
}
}
// This function handles values that require validation before their first use,
// or some kind of a transformation (such as conversion to an integer) needs
// to be done before they can be used directly.
func ircParseConfig() error {
// TODO: I think we could further shorten this with lambdas, doing away
// with the custom error type completely and at the same time getting rid of
// the key stuttering.
cp := &configProcessor{}
cp.read("ping_interval", func(value string) string {
if u, err := strconv.ParseUint(
config["ping_interval"], 10, 32); err != nil {
return &configError{"ping_interval", err}
return err.Error()
} else if u < 1 {
return &configError{"ping_interval",
errors.New("the value is out of range")}
return "the value is out of range"
} else {
pingInterval = uint(u)
}
return ""
})
cp.read("max_connections", func(value string) string {
if i, err := strconv.ParseInt(
config["max_connections"], 10, 32); err != nil {
return &configError{"max_connections", err}
value, 10, 32); err != nil {
return err.Error()
} else if i < 0 {
return &configError{"max_connections",
errors.New("the value is out of range")}
return "the value is out of range"
} else {
maxConnections = int(i)
}
return ""
})
cp.read("operators", func(value string) string {
operators = make(map[string]bool)
for _, fp := range splitString(config["operators"], ",", true) {
for _, fp := range splitString(value, ",", true) {
if !ircIsValidFingerprint(fp) {
return &configError{"operators",
errors.New("invalid fingerprint valeu")}
return "invalid fingerprint value"
}
operators[strings.ToLower(fp)] = true
}
return nil
return ""
})
return cp.err
}
func ircInitializeServerName() error {