From c84a2abb14d365fa3cc206fdd6ff73dd4a895fb5 Mon Sep 17 00:00:00 2001
From: Kevin Yue <yuezk001@gmail.com>
Date: Sat, 18 Sep 2021 20:43:42 +0800
Subject: [PATCH] check the openconnect version

---
 GPService/gpservice.cpp | 48 +++++++++++++++++++++++++++++++++--------
 GPService/gpservice.h   |  5 +++--
 2 files changed, 42 insertions(+), 11 deletions(-)

diff --git a/GPService/gpservice.cpp b/GPService/gpservice.cpp
index 0d5fe4e..0676b9f 100644
--- a/GPService/gpservice.cpp
+++ b/GPService/gpservice.cpp
@@ -1,10 +1,12 @@
 #include "gpservice.h"
 #include "gpserviceadaptor.h"
 
-#include <QFileInfo>
-#include <QtDBus>
-#include <QDateTime>
-#include <QVariant>
+#include <QtCore/QFileInfo>
+#include <QtDBus/QtDBus>
+#include <QtCore/QDateTime>
+#include <QtCore/QVariant>
+#include <QtCore/QRegularExpression>
+#include <QtCore/QRegularExpressionMatch>
 
 GPService::GPService(QObject *parent)
     : QObject(parent)
@@ -104,19 +106,47 @@ void GPService::connect(QString server, QString username, QString passwd, QStrin
         return;
     }
 
+    if (!isValidVersion(bin)) {
+        return;
+    }
+
     QStringList args;
     args << QCoreApplication::arguments().mid(1)
-     << "--protocol=gp"
-     << splitCommand(extraArgs)
-     << "-u" << username
-     << "-C" << passwd
-     << server;
+         << "--protocol=gp"
+         << splitCommand(extraArgs)
+         << "-u" << username
+         << "-C" << passwd
+         << server;
 
     log("Start process with arugments: " + args.join(" "));
 
     openconnect->start(bin, args);
 }
 
+bool GPService::isValidVersion(QString &bin) {
+    QProcess p;
+    p.start(bin, QStringList("--version"));
+    p.waitForFinished();
+    QString output = p.readAllStandardOutput();
+
+    QRegularExpression re("v(\\d+).*?\\n");
+    QRegularExpressionMatch match = re.match(output);
+
+    if (match.hasMatch()) {
+        QString fullVersion = match.captured(0);
+        QString majorVersion = match.captured(1);
+
+        if (majorVersion.toInt() < 8) {
+            emit error("The OpenConnect version must greater than v8.0.0, but got " + fullVersion);
+            return false;
+        }
+    } else {
+        log("Failed to parse the OpenConnect version from " + output);
+    }
+
+    return true;
+}
+
 void GPService::disconnect()
 {
     if (openconnect->state() != QProcess::NotRunning) {
diff --git a/GPService/gpservice.h b/GPService/gpservice.h
index db72f8a..a3b4856 100644
--- a/GPService/gpservice.h
+++ b/GPService/gpservice.h
@@ -1,8 +1,8 @@
 #ifndef GLOBALPROTECTSERVICE_H
 #define GLOBALPROTECTSERVICE_H
 
-#include <QObject>
-#include <QProcess>
+#include <QtCore/QObject>
+#include <QtCore/QProcess>
 
 static const QString binaryPaths[] {
     "/usr/local/bin/openconnect",
@@ -54,6 +54,7 @@ private:
     int vpnStatus = GPService::VpnNotConnected;
 
     void log(QString msg);
+    bool isValidVersion(QString &bin);
     static QString findBinary();
     static QStringList splitCommand(QString command);
 };