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/*
* Copyright (C) 2004-2025 ZNC, see the NOTICE file for details.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <znc/Modules.h>
#include <znc/IRCNetwork.h>
using std::set;
class CBlockMotd : public CModule {
public:
MODCONSTRUCTOR(CBlockMotd) {
AddHelpCommand();
AddCommand("GetMotd", t_d("[<server>]"),
t_d("Override the block with this command. Can optionally "
"specify which server to query."),
[this](const CString& sLine) { OverrideCommand(sLine); });
}
~CBlockMotd() override {}
void OverrideCommand(const CString& sLine) {
if (!GetNetwork() || !GetNetwork()->GetIRCSock()) {
PutModule(t_s("You are not connected to an IRC Server."));
return;
}
TemporarilyAcceptMotd();
const CString sServer = sLine.Token(1);
if (sServer.empty()) {
PutIRC("MOTD");
} else {
PutIRC("MOTD " + sServer);
}
}
EModRet OnNumericMessage(CNumericMessage& Message) override {
if ((Message.GetCode() == 375 /* begin of MOTD */ ||
Message.GetCode() == 372 /* MOTD */) &&
!ShouldTemporarilyAcceptMotd())
return HALT;
if (Message.GetCode() == 376 /* End of MOTD */) {
if (!ShouldTemporarilyAcceptMotd()) {
Message.SetParam(1, t_s("MOTD blocked by ZNC"));
}
StopTemporarilyAcceptingMotd();
}
if (Message.GetCode() == 422) {
// Server has no MOTD
StopTemporarilyAcceptingMotd();
}
return CONTINUE;
}
void OnIRCDisconnected() override {
StopTemporarilyAcceptingMotd();
}
bool ShouldTemporarilyAcceptMotd() const {
return m_sTemporaryAcceptedMotdSocks.count(GetNetwork()->GetIRCSock()) > 0;
}
void TemporarilyAcceptMotd() {
if (ShouldTemporarilyAcceptMotd()) {
return;
}
m_sTemporaryAcceptedMotdSocks.insert(GetNetwork()->GetIRCSock());
}
void StopTemporarilyAcceptingMotd() {
m_sTemporaryAcceptedMotdSocks.erase(GetNetwork()->GetIRCSock());
}
private:
set<CIRCSock *> m_sTemporaryAcceptedMotdSocks;
};
template <>
void TModInfo<CBlockMotd>(CModInfo& Info) {
Info.AddType(CModInfo::NetworkModule);
Info.AddType(CModInfo::GlobalModule);
Info.SetWikiPage("block_motd");
}
USERMODULEDEFS(
CBlockMotd,
t_s("Block the MOTD from IRC so it's not sent to your client(s)."))
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