fedserv/echoIRCd
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mode: cap mode changes per MODE command (modes=, default 20) and advertise it as the MODES= ISUPPORT token — an uncapped modestring like MODE #c +bbbb… dispatched a handler per letter, each fanning out to the whole channel and every S2S link (amplification DoS); matches InspIRCd's MODES limit

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Jean Chevronnet 2026-08-19 00:40:58 +00:00
parent 11cec9fc36
commit c72b966e0a
2 changed files with 11 additions and 1 deletions
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3
src/server.rs
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@ -771,12 +771,13 @@ impl Server {
let chathist = crate::modules::chathistory::limit(self);
let maxnick = self.conf_num("maxnick", 30usize);
let maxchan = self.conf_num("maxchannel", 50usize);
let maxmodes = self.conf_num("modes", 20usize).max(1);
// operprefix/ojoin add the server oper prefix `y` above owner; sigils are
// config-overridable (see modules::customprefix)
let include_oper = self.conf_bool("operprefix", false) || self.conf_bool("ojoin", false);
let prefix = crate::modules::customprefix::isupport(include_oper);
let mut tokens: Vec<String> = format!(
"CHANTYPES=# PREFIX={prefix} CHANMODES=beIgXw,k,lfjFLHBJdK,ACDGMNOPQRSTUcimnprstuz EXTBAN=,aGbcgjmnrsy ACCOUNTEXTBAN=a BOT=B WATCH={maxwatch} MONITOR={maxmon} SILENCE={maxsil} CALLERID=g WHOX CHATHISTORY={chathist} MSGREFTYPES=timestamp,msgid UTF8ONLY CASEMAPPING=ascii NICKLEN={maxnick} CHANNELLEN={maxchan} NETWORK={}",
"CHANTYPES=# PREFIX={prefix} CHANMODES=beIgXw,k,lfjFLHBJdK,ACDGMNOPQRSTUcimnprstuz EXTBAN=,aGbcgjmnrsy ACCOUNTEXTBAN=a BOT=B WATCH={maxwatch} MONITOR={maxmon} SILENCE={maxsil} CALLERID=g WHOX CHATHISTORY={chathist} MSGREFTYPES=timestamp,msgid UTF8ONLY CASEMAPPING=ascii NICKLEN={maxnick} CHANNELLEN={maxchan} MODES={maxmodes} NETWORK={}",
self.network
)
.split(' ')