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downstream: fix nickCM out-of-sync with effective case-mapping

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We were unconditionally using the ASCII case-mapping in updateNick(),
for instance.

Introduce downstreamConn.casemap to fix this, and use it everywhere.
This commit is contained in:
Simon Ser 2023-03-01 14:59:08 +01:00
parent aecff32103
commit 6b82ed990c
1 changed files with 16 additions and 12 deletions
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28
downstream.go
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@ -348,6 +348,7 @@ type downstreamConn struct {
lastBatchRef uint64 lastBatchRef uint64
casemap xirc.CaseMapping
monitored xirc.CaseMappingMap[struct{}] monitored xirc.CaseMappingMap[struct{}]
} }
@ -355,6 +356,7 @@ func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
remoteAddr := ic.RemoteAddr().String() remoteAddr := ic.RemoteAddr().String()
logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)} logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
options := connOptions{Logger: logger} options := connOptions{Logger: logger}
cm := xirc.CaseMappingASCII
dc := &downstreamConn{ dc := &downstreamConn{
conn: *newConn(srv, ic, &options), conn: *newConn(srv, ic, &options),
id: id, id: id,
@ -362,7 +364,8 @@ func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
nickCM: "*", nickCM: "*",
username: "~u", username: "~u",
caps: xirc.NewCapRegistry(), caps: xirc.NewCapRegistry(),
monitored: xirc.NewCaseMappingMap[struct{}](xirc.CaseMappingASCII), casemap: cm,
monitored: xirc.NewCaseMappingMap[struct{}](cm),
registration: new(downstreamRegistration), registration: new(downstreamRegistration),
} }
if host, _, err := net.SplitHostPort(remoteAddr); err == nil { if host, _, err := net.SplitHostPort(remoteAddr); err == nil {
@ -1109,7 +1112,7 @@ func (dc *downstreamConn) updateNick() {
Params: []string{nick}, Params: []string{nick},
}) })
dc.nick = nick dc.nick = nick
dc.nickCM = xirc.CaseMappingASCII(dc.nick) dc.nickCM = dc.casemap(dc.nick)
} }
func (dc *downstreamConn) updateHost() { func (dc *downstreamConn) updateHost() {
@ -1201,6 +1204,7 @@ func (dc *downstreamConn) updateCasemapping() {
cm = dc.network.casemap cm = dc.network.casemap
} }
dc.casemap = cm
dc.nickCM = cm(dc.nick) dc.nickCM = cm(dc.nick)
dc.monitored.SetCaseMapping(cm) dc.monitored.SetCaseMapping(cm)
} }
@ -1445,7 +1449,7 @@ func (dc *downstreamConn) welcome(ctx context.Context) error {
} else { } else {
dc.nick = dc.user.Username dc.nick = dc.user.Username
} }
dc.nickCM = xirc.CaseMappingASCII(dc.nick) dc.nickCM = dc.casemap(dc.nick)
var isupport []string var isupport []string
if dc.network != nil { if dc.network != nil {
@ -1760,7 +1764,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
Params: []string{dc.nick, nick, "Nickname contains illegal characters"}, Params: []string{dc.nick, nick, "Nickname contains illegal characters"},
}} }}
} }
if xirc.CaseMappingASCII(nick) == serviceNickCM { if dc.casemap(nick) == serviceNickCM {
return ircError{&irc.Message{ return ircError{&irc.Message{
Command: irc.ERR_NICKNAMEINUSE, Command: irc.ERR_NICKNAMEINUSE,
Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"}, Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
@ -2001,7 +2005,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
modeStr = msg.Params[1] modeStr = msg.Params[1]
} }
if xirc.CaseMappingASCII(name) == dc.nickCM { if dc.casemap(name) == dc.nickCM {
if modeStr != "" { if modeStr != "" {
if uc := dc.upstream(); uc != nil { if uc := dc.upstream(); uc != nil {
uc.SendMessageLabeled(ctx, dc.id, &irc.Message{ uc.SendMessageLabeled(ctx, dc.id, &irc.Message{
@ -2166,7 +2170,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
fields, whoxToken := xirc.ParseWHOXOptions(options) fields, whoxToken := xirc.ParseWHOXOptions(options)
// TODO: support mixed bouncer/upstream WHO queries // TODO: support mixed bouncer/upstream WHO queries
maskCM := xirc.CaseMappingASCII(mask) maskCM := dc.casemap(mask)
if dc.network == nil && maskCM == dc.nickCM { if dc.network == nil && maskCM == dc.nickCM {
// TODO: support AWAY (H/G) in self WHO reply // TODO: support AWAY (H/G) in self WHO reply
flags := "H" flags := "H"
@ -2275,7 +2279,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
mask = mask[:i] mask = mask[:i]
} }
if dc.network == nil && xirc.CaseMappingASCII(mask) == dc.nickCM { if dc.network == nil && dc.casemap(mask) == dc.nickCM {
dc.SendMessage(&irc.Message{ dc.SendMessage(&irc.Message{
Prefix: dc.srv.prefix(), Prefix: dc.srv.prefix(),
Command: irc.RPL_WHOISUSER, Command: irc.RPL_WHOISUSER,
@ -2305,7 +2309,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
}) })
return nil return nil
} }
if xirc.CaseMappingASCII(mask) == serviceNickCM { if dc.casemap(mask) == serviceNickCM {
dc.SendMessage(&irc.Message{ dc.SendMessage(&irc.Message{
Prefix: dc.srv.prefix(), Prefix: dc.srv.prefix(),
Command: irc.RPL_WHOISUSER, Command: irc.RPL_WHOISUSER,
@ -2392,7 +2396,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
continue continue
} }
if dc.network == nil && xirc.CaseMappingASCII(name) == dc.nickCM { if dc.network == nil && dc.casemap(name) == dc.nickCM {
dc.SendMessage(&irc.Message{ dc.SendMessage(&irc.Message{
Tags: msg.Tags.Copy(), Tags: msg.Tags.Copy(),
Prefix: dc.prefix(), Prefix: dc.prefix(),
@ -2402,7 +2406,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
continue continue
} }
if xirc.CaseMappingASCII(name) == serviceNickCM { if dc.casemap(name) == serviceNickCM {
if dc.caps.IsEnabled("echo-message") { if dc.caps.IsEnabled("echo-message") {
echoTags := tags.Copy() echoTags := tags.Copy()
echoTags["time"] = dc.user.FormatServerTime(time.Now()) echoTags["time"] = dc.user.FormatServerTime(time.Now())
@ -2722,7 +2726,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
} }
// We don't save history for our service // We don't save history for our service
if xirc.CaseMappingASCII(target) == serviceNickCM { if dc.casemap(target) == serviceNickCM {
dc.SendBatch("chathistory", []string{target}, nil, func(batchRef string) {}) dc.SendBatch("chathistory", []string{target}, nil, func(batchRef string) {})
return nil return nil
} }
@ -2847,7 +2851,7 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
} }
// We don't save read receipts for our service // We don't save read receipts for our service
if xirc.CaseMappingASCII(target) == serviceNickCM { if dc.casemap(target) == serviceNickCM {
dc.SendMessage(&irc.Message{ dc.SendMessage(&irc.Message{
Prefix: dc.prefix(), Prefix: dc.prefix(),
Command: msg.Command, Command: msg.Command,