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identfile.cpp
205 lines (166 loc) · 5.58 KB
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identfile.cpp
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/*
* Copyright (C) 2004-2014 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/FileUtils.h>
#include <znc/IRCSock.h>
#include <znc/User.h>
#include <znc/IRCNetwork.h>
class CIdentFileModule : public CModule {
CString m_sOrigISpoof;
CFile* m_pISpoofLockFile;
CIRCSock *m_pIRCSock;
public:
MODCONSTRUCTOR(CIdentFileModule) {
AddHelpCommand();
AddCommand("GetFile", static_cast<CModCommand::ModCmdFunc>(&CIdentFileModule::GetFile));
AddCommand("SetFile", static_cast<CModCommand::ModCmdFunc>(&CIdentFileModule::SetFile),
"<file>");
AddCommand("GetFormat", static_cast<CModCommand::ModCmdFunc>(&CIdentFileModule::GetFormat));
AddCommand("SetFormat", static_cast<CModCommand::ModCmdFunc>(&CIdentFileModule::SetFormat),
"<format>");
AddCommand("Show", static_cast<CModCommand::ModCmdFunc>(&CIdentFileModule::Show));
m_pISpoofLockFile = NULL;
m_pIRCSock = NULL;
}
virtual ~CIdentFileModule() {
ReleaseISpoof();
}
void GetFile(const CString& sLine) {
PutModule("File is set to: " + GetNV("File"));
}
void SetFile(const CString& sLine) {
SetNV("File", sLine.Token(1, true));
PutModule("File has been set to: " + GetNV("File"));
}
void SetFormat(const CString& sLine) {
SetNV("Format", sLine.Token(1, true));
PutModule("Format has been set to: " + GetNV("Format"));
PutModule("Format would be expanded to: " + ExpandString(GetNV("Format")));
}
void GetFormat(const CString& sLine) {
PutModule("Format is set to: " + GetNV("Format"));
PutModule("Format would be expanded to: " + ExpandString(GetNV("Format")));
}
void Show(const CString& sLine) {
PutModule("m_pISpoofLockFile = " + CString((long long)m_pISpoofLockFile));
PutModule("m_pIRCSock = " + CString((long long)m_pIRCSock));
if (m_pIRCSock) {
PutModule("user/network - " + m_pIRCSock->GetNetwork()->GetUser()->GetUserName() + "/" + m_pIRCSock->GetNetwork()->GetName());
} else {
PutModule("identfile is free");
}
}
void OnModCommand(const CString& sCommand) {
if (m_pUser->IsAdmin()) {
HandleCommand(sCommand);
} else {
PutModule("Access denied");
}
}
void SetIRCSock(CIRCSock *pIRCSock) {
if (m_pIRCSock) {
CZNC::Get().ResumeConnectQueue();
}
m_pIRCSock = pIRCSock;
if (m_pIRCSock) {
CZNC::Get().PauseConnectQueue();
}
}
bool WriteISpoof() {
if (m_pISpoofLockFile != NULL) {
return false;
}
m_pISpoofLockFile = new CFile;
if (!m_pISpoofLockFile->TryExLock(GetNV("File"), O_RDWR | O_CREAT)) {
delete m_pISpoofLockFile;
m_pISpoofLockFile = NULL;
return false;
}
char buf[1024];
memset((char*) buf, 0, 1024);
m_pISpoofLockFile->Read(buf ,1024);
m_sOrigISpoof = buf;
if (!m_pISpoofLockFile->Seek(0) || !m_pISpoofLockFile->Truncate()) {
delete m_pISpoofLockFile;
m_pISpoofLockFile = NULL;
return false;
}
CString sData = ExpandString(GetNV("Format"));
// If the format doesn't contain anything expandable, we'll
// assume this is an "old"-style format string.
if (sData == GetNV("Format")) {
sData.Replace("%", m_pUser->GetIdent());
}
DEBUG("Writing [" + sData + "] to ident spoof file [" + m_pISpoofLockFile->GetLongName() + "] for user/network [" + m_pUser->GetUserName() + "/" + m_pNetwork->GetName() + "]");
m_pISpoofLockFile->Write(sData + "\n");
return true;
}
void ReleaseISpoof() {
DEBUG("Releasing ident spoof for user/network [" + (m_pIRCSock ? m_pIRCSock->GetNetwork()->GetUser()->GetUserName() + "/" +
m_pIRCSock->GetNetwork()->GetName() : "<no user/network>") + "]");
SetIRCSock(NULL);
if (m_pISpoofLockFile != NULL) {
if (m_pISpoofLockFile->Seek(0) && m_pISpoofLockFile->Truncate()) {
m_pISpoofLockFile->Write(m_sOrigISpoof);
}
delete m_pISpoofLockFile;
m_pISpoofLockFile = NULL;
}
}
virtual bool OnLoad(const CString& sArgs, CString& sMessage) {
m_pISpoofLockFile = NULL;
m_pIRCSock = NULL;
if (GetNV("Format").empty()) {
SetNV("Format", "global { reply \"%ident%\" }");
}
if (GetNV("File").empty()) {
SetNV("File", "~/.oidentd.conf");
}
return true;
}
virtual EModRet OnIRCConnecting(CIRCSock *pIRCSock) {
if (m_pISpoofLockFile != NULL) {
DEBUG("Aborting connection, ident spoof lock file exists");
PutModule("Aborting connection, another user or network is currently connecting and using the ident spoof file");
return HALTCORE;
}
if (!WriteISpoof()) {
DEBUG("identfile [" + GetNV("File") + "] could not be written");
PutModule("[" + GetNV("File") + "] could not be written, retrying...");
return HALTCORE;
}
SetIRCSock(pIRCSock);
return CONTINUE;
}
virtual void OnIRCConnected() {
if (m_pIRCSock == m_pNetwork->GetIRCSock()) {
ReleaseISpoof();
}
}
virtual void OnIRCConnectionError(CIRCSock *pIRCSock) {
if (m_pIRCSock == pIRCSock) {
ReleaseISpoof();
}
}
virtual void OnIRCDisconnected() {
if (m_pIRCSock == m_pNetwork->GetIRCSock()) {
ReleaseISpoof();
}
}
};
template<> void TModInfo<CIdentFileModule>(CModInfo& Info) {
Info.SetWikiPage("identfile");
}
GLOBALMODULEDEFS(CIdentFileModule, "Write the ident of a user to a file when they are trying to connect")