Qt 嵌入式 利用wpa_supplicant编写WIFI、有线网络管理器
来源：互联网 发布：税友软件怎么样 编辑：程序博客网 时间：2024/06/03 06:43
原文链接：http://blog.csdn.net/dr_abel/article/details/51335599
嵌入式linux系统中没有内置自动化程度高的管理程序，这个程序就完成根据有线插拔来判断是否启用无线的功能。
QTENetworkManager
qtenetworkmanager.h
#ifndef QTENETWORKMANAGER_H#define QTENETWORKMANAGER_H#include <QObject>#include <QTimer>#include <QList>#include "QTEDefine.h"#include <qthread.h>#include "QTEDefine.h"class QTENetworkClearThread : public QThread{ Q_OBJECTpublic: QTENetworkClearThread(QObject* parent = 0) : QThread(parent) { }signals: void cleared(); void notcleared(); // QThread interfaceprotected: void run();};class QTEDhcpThread : public QThread{ Q_OBJECTpublic: QTEDhcpThread(QObject* parent = 0) : QThread(parent) { } void setnet(QString eth = "eth0") {net=eth;}signals: void passed(QString); // QThread interfaceprotected: void run();private: QString net;};// thread unsafeclass QTENetworkManager : public QObject{ Q_OBJECTpublic: static QTENetworkManager *Instance(QObject* parent = 0); QList<TWifi>& wifiList() { return m_wifiList; } inline TWifi currentWifi(){ return m_curWifi; } bool setCurrentWifi(QString bssid_mac, QString password = ""); void setRefresh(bool ref = true) { ref ? m_workTimer->start(5000) : m_workTimer->stop(); } void setDHCP(bool bUse = false) { m_bUseDHCP = bUse; } void configIPAddress(QString ip, QString mask, QString gw, QString dns); QString currentNetName(); QTimer* workTimer() { return m_workTimer; } void saveAddr(QString ip, QString mask, QString gw, QString dns); void getAddr(QString& ip, QString& mask, QString& gw, QString& dns);signals: //没有配置就会发送这个信号 void sigScanning(); //断开连接的状态 void sigDisConnected(); //正在连接的状态 void sigConnecting(); //连接成功的状态 void sigConnected(); //Wifi列表更新 之上状态改变会影响list中wifi的标志位。 void sigRefreshed(); //Wifi状态改变 void sigStatusChanged(QString status); //有线连接上 void sigLanConnected(); //有线断开 void sigLanDisConnected(); //网络线路连接上 void sigNetworkClear(); //网络线路断开 void sigNetworkNotClear();private slots: void refreshWifiList(); void refreshWifiStatus(); void checkLanConnection(); void DhcpPassed(QString netname); void checkNetworkClear();private: explicit QTENetworkManager(QObject *parent = 0); void readStatus(); void restoreWifi(); bool restartWifi(); void saveScript(); void config();signals:public slots:private: static QTENetworkManager* _instance; QTimer* m_workTimer; QList<TWifi> m_wifiList; TWifi m_curWifi; bool m_bUseDHCP; QString m_netName; QTEDhcpThread* m_thread; QTENetworkClearThread* m_clearThread; QString m_status;};#endif // QTENETWORKMANAGER_Hqtenetworkmanager.cpp#include "QTENetworkManager.h"#include "hnlinux.h"#include "QTEDefine.h"QTENetworkManager* QTENetworkManager::_instance = NULL;QTENetworkManager *QTENetworkManager::Instance(QObject *parent){ if(_instance) return _instance; _instance = new QTENetworkManager(parent); return _instance;}bool QTENetworkManager::setCurrentWifi(QString bssid_mac, QString password){ for(QList<TWifi>::Iterator it = m_wifiList.begin(); it != m_wifiList.end(); it++) { TWifi wifi = *it; if(bssid_mac == wifi[ESSID_BSSID]) { m_status = ""; m_curWifi = wifi; m_curWifi[ESSID_PASS] = password; break; } } restoreWifi(); if(!restartWifi()) return false; return true;}void QTENetworkManager::configIPAddress(QString ip, QString mask, QString gw, QString dns){ saveAddr(ip, mask, gw, dns); saveScript(); config();}QString QTENetworkManager::currentNetName(){ if("eth0" == m_netName) return "Wired Lan"; if("wlan0" == m_netName) if("COMPLETED" == m_status) return m_curWifi[ESSID_NAME]; return "";}void QTENetworkManager::readStatus(){ //从 status 中读取 char result[MAX_LEN]; char key[MAX_LEN]; //设置一个合适的长度，以存储每一行输出 char value[MAX_LEN]; //设置一个合适的长度，以存储每一行输出 bzero(result, MAX_LEN); bzero(key, MAX_LEN); bzero(value, MAX_LEN); FILE *pp = popen("wpa_cli -iwlan0 status", "r"); //建立管道 if (!pp) return; while( fgets(result, sizeof(result), pp) != NULL) { sscanf(result, "%[^=]=%s", key, value); //如果这里不用QString包含，会对比地址 if(QString("wpa_state") == QString(key)) { m_curWifi[ESSID_STATUS] = value; } else if(QString("bssid") == QString(key)) { m_curWifi[ESSID_BSSID] = value; } else if(QString("ssid") == QString(key)) { m_curWifi[ESSID_NAME] = value; } } pclose(pp); return;}void QTENetworkManager::refreshWifiList(){ static int scanid = 0; if(scanid == 12) scanid = 0, system("wpa_cli -iwlan0 scan"); scanid ++; FILE *pp = popen("wpa_cli -iwlan0 scan_r", "r"); //建立管道 if (!pp) return; char cmdresult[MAX_LEN]; //设置一个合适的长度，以存储每一行输出 fgets(cmdresult, sizeof(cmdresult), pp) ; //"" char bssid[MAX_PATH]; char frequency[MAX_PATH]; char signal[MAX_PATH]; char flag[MAX_PATH]; char ssid[MAX_PATH]; m_wifiList.clear(); while( fgets(cmdresult, sizeof(cmdresult), pp) != NULL) { sscanf(cmdresult, "%s\t%s\t%s\t%s\t%s\n", bssid, frequency, signal, flag, ssid); TWifi wifi; wifi[ESSID_NAME] = ssid; if( strstr(flag, "WPA")) wifi[ESSID_TYPE] = "WPA"; else wifi[ESSID_TYPE] = "WEP"; if(strstr(flag, "WPA") || strstr(flag, "WEP")) wifi[ESSID_ENCRYP] = "YES"; else wifi[ESSID_ENCRYP] = "NO"; wifi[ESSID_PASS] = ""; wifi[ESSID_BSSID] = bssid; wifi[ESSID_FREQ] = frequency; wifi[ESSID_SIGNAL] = signal; wifi[ESSID_FLAG] = flag; if(wifi[ESSID_BSSID] == m_curWifi[ESSID_BSSID]) wifi[ESSID_STATUS] = m_curWifi[ESSID_STATUS]; else wifi[ESSID_STATUS] = ""; m_wifiList.push_back(wifi); //pline() << ssid << frequency << signal << flag << bssid << wifi[ESSID_STATUS]; } //pline() << m_wifiList.size(); pclose(pp); //关闭管道 emit sigRefreshed();}void QTENetworkManager::refreshWifiStatus(){ readStatus(); if(m_status == m_curWifi[ESSID_STATUS]) return; pline() << m_curWifi[ESSID_BSSID] << m_curWifi[ESSID_NAME] << m_curWifi[ESSID_STATUS]; m_status = m_curWifi[ESSID_STATUS]; emit sigStatusChanged(m_status); if("COMPLETED" == m_status) emit sigConnected(); else if("SCANNING" == m_status) emit sigScanning(); else if("ASSOCIATING" == m_status) emit sigConnecting(); else if("INACTIVE" == m_status) emit sigDisConnected(); else if("4WAY_HANDSHAKE" == m_status) emit sigDisConnected(); else if("DISCONNECTED" == m_status) emit sigDisConnected();}void QTENetworkManager::checkLanConnection(){ char cmdbuf[MAX_PATH]; char cmdresult[MAX_PATH]; //设置一个合适的长度，以存储每一行输出 bzero(cmdbuf, MAX_PATH); bzero(cmdresult, MAX_PATH); sprintf(cmdbuf, "cat /sys/class/net/eth0/carrier"); FILE *pp = popen(cmdbuf, "r"); //建立管道 fgets(cmdresult, sizeof(cmdresult), pp); //"" pclose(pp); QString netName = m_netName; if(strstr(cmdresult, "0")) m_netName = "wlan0"; else m_netName = "eth0"; if(netName != m_netName) { config(); if("wlan0" == m_netName) emit sigLanDisConnected(); else emit sigLanConnected(); } return;}void QTENetworkManager::DhcpPassed(QString netname){ int sockfd; struct ifreq ifr; struct sockaddr_in sin; sockfd = socket(AF_INET, SOCK_DGRAM, 0); if (sockfd == -1) { perror("socket"); return; } strncpy(ifr.ifr_name, netname.toAscii().data(), IFNAMSIZ); ifr.ifr_name[IFNAMSIZ - 1] = 0; //ip if(ioctl(sockfd, SIOCGIFADDR, &ifr) <0) perror("ioctl"); memcpy(&sin, &ifr.ifr_addr, sizeof(sin)); QString ip = QString(inet_ntoa(sin.sin_addr)); //mask if (ioctl(sockfd, SIOCGIFNETMASK, &ifr) < 0) perror("ioctl"); memcpy(&sin, &ifr.ifr_addr, sizeof(sin)); QString mask = QString(inet_ntoa(sin.sin_addr)); //mac if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) < 0) perror("ioctl"); memcpy(&sin, &ifr.ifr_addr, sizeof(sin)); QString mac = QString(inet_ntoa(sin.sin_addr)); close(sockfd); //gw FILE *fp; char buf[MAX_PATH]; char gateway[MAX_PATH]; bzero(buf, MAX_PATH); bzero(gateway, MAX_PATH); fp = popen("ip route", "r"); while(fgets(buf, sizeof(buf), fp) != NULL) { if(strstr(buf, "default via")) { sscanf(buf, "%*s%*s%s", gateway); break; } } pclose(fp); QString gw = gateway; //dns QFile file("/etc/resolv.conf"); file.open(QFile::ReadOnly); QByteArray nameserver = file.readLine(); nameserver[nameserver.size()-1] = '\0'; QList<QByteArray> namelist = nameserver.split(' '); QString dns = namelist.size() > 1 ? namelist[1] : gw; file.close(); //pt pline() << netname << ip << mask << gw << dns; saveAddr(ip, mask, gw, dns); saveScript();}void QTENetworkManager::checkNetworkClear(){ return; m_clearThread->start();}QTENetworkManager::QTENetworkManager(QObject *parent) : QObject(parent){ m_bUseDHCP = false; m_clearThread = new QTENetworkClearThread(this); connect(m_clearThread, SIGNAL(cleared()), this, SIGNAL(sigNetworkClear())); connect(m_clearThread, SIGNAL(notcleared()), this, SIGNAL(sigNetworkNotClear())); m_thread = new QTEDhcpThread(this); connect(m_thread, SIGNAL(passed(QString)), this, SLOT(DhcpPassed(QString))); //检查网线 //搜索热点 //刷新连接状态 m_workTimer = new QTimer(this); m_workTimer->setSingleShot(false); connect(m_workTimer, SIGNAL(timeout()), this, SLOT(refreshWifiList())); connect(m_workTimer, SIGNAL(timeout()), this, SLOT(refreshWifiStatus())); connect(m_workTimer, SIGNAL(timeout()), this, SLOT(checkLanConnection())); connect(m_workTimer, SIGNAL(timeout()), this, SLOT(checkNetworkClear()));#ifdef __MIPS_LINUX__ m_workTimer->start(5000); //更新一次，以后一直调用scan_r 5-6s system("wpa_cli -iwlan0 scan");#endif}void QTENetworkManager::restoreWifi(){ QString name = m_curWifi[ESSID_NAME]; QString password = m_curWifi[ESSID_PASS]; QString encryt = m_curWifi[ESSID_ENCRYP]; QString type = m_curWifi[ESSID_TYPE]; char cmdbuf[MAX_PATH]; char cmdresult[MAX_PATH]; FILE* fp=fopen("/etc/wpa_supplicant.conf", "wb"); fprintf(fp, "ctrl_interface=/var/run/wpa_supplicant\nctrl_interface_group=0\nap_scan=1\n\n"); if("NO" == encryt) { pline() << "None Encryption"; fprintf(fp, "network={\n\tssid=%s\n\tkey_mgmt=NONE\n\tpriority=5\n}\n", name.toAscii().data()); } else if("WEP" == type) { pline() << "WEP Encryption"; fprintf(fp, "network={\n\tssid=\"%s\"\n\tkey_mgmt=NONE\n\twep_key0=%s\n\twep_tx_keyidx=0\n\tpriority=5\n\tauth_alg=SHARED\n}\n", name.toAscii().data(), password.toAscii().data()); } else if("WPA" == type) { pline() << "WPA Encryption"; bzero(cmdbuf, MAX_PATH); bzero(cmdresult, MAX_PATH);#if 0 sprintf(cmdbuf, "wpa_passphrase %s %s | awk 'NR==4{print $1}'", name.toAscii().data(), wifiPassword.toAscii().data()); FILE *pp = popen(cmdbuf, "r"); //建立管道 fgets(cmdresult, sizeof(cmdresult), pp) ; //"" pclose(pp); fprintf(fp, "network={\n\tssid=\"%s\"\n\tkey_mgmt=WPA-PSK\n\tgroup=TKIP\n\tpairwise=CCMP\n\tproto=WPA\n\t#psk=\"%s\"\n\t%s\tpriority=5\n}\n", name, wifiPassword, cmdresult);#else sprintf(cmdbuf, "wpa_passphrase %s %s", name.toAscii().data(), password.toAscii().data()); FILE *pp = popen(cmdbuf, "r"); //建立管道 while(fgets(cmdresult, sizeof(cmdresult), pp)) //"" { fputs(cmdresult, fp); } pclose(pp);#endif } fclose(fp);}bool QTENetworkManager::restartWifi(){ char cmdbuf[MAX_PATH]; char cmdresult[MAX_PATH]; //设置一个合适的长度，以存储每一行输出 bzero(cmdbuf, MAX_PATH); bzero(cmdresult, MAX_PATH); sprintf(cmdbuf, "wpa_cli -iwlan0 reconf"); FILE *pp = popen(cmdbuf, "r"); //建立管道 fgets(cmdresult, sizeof(cmdresult), pp); //"" pclose(pp); if(strstr(cmdresult, "FAIL")) return false; return true;}void QTENetworkManager::saveScript(){ QString ip, mask, gw, dns; getAddr(ip, mask, gw, dns); QFile script("./net.sh"); script.open(QFile::WriteOnly); char cmdbuf[MAX_PATH]; bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "#!/bin/sh\n\n"); script.write(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "ifconfig eth0 %s netmask %s up\n", ip.toAscii().data(), mask.toAscii().data()); script.write(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "ifconfig wlan0 %s netmask %s up\n", ip.toAscii().data(), mask.toAscii().data()); script.write(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "route add default gw %s netmask 0.0.0.0 dev eth0\n", gw.toAscii().data()); script.write(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "route add default gw %s netmask 0.0.0.0 dev wlan0\n", gw.toAscii().data()); script.write(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "echo nameserver %s > /etc/resolv.conf\n", dns.toAscii().data()); script.write(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "wpa_supplicant -B -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n"); script.write(cmdbuf); script.close(); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "chmod +x ./net.sh"); system(cmdbuf);}void QTENetworkManager::config(){ char cmdbuf[MAX_PATH]; bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "ip route | awk '{print $1}' | while read line; do ip route del $line; done"); system(cmdbuf); //system("route"); if(m_bUseDHCP) { m_thread->setnet(m_netName); m_thread->start(); return; } QString ip, mask, gw, dns; getAddr(ip, mask, gw, dns); pline() << m_netName << ip << mask << gw << dns; // add .0 route bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "ifconfig %s 0.0.0.0 up", m_netName.toAscii().data()); system(cmdbuf); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "ifconfig %s %s netmask %s", m_netName.toAscii().data(), ip.toAscii().data(), mask.toAscii().data()); system(cmdbuf); QStringList sl = gw.split("."); if(sl.size() < 3) { sl.clear(); sl << "0" << "0" << "0" << "0";} QString net = QString("%1.%2.%3.0").arg(sl[0]).arg(sl[1]).arg(sl[2]);#if 0 //dhcp后 ifconfig up 引发了添加这条route //ifconfig 0.0.0.0 也能引发添加这条route bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "route add -net %s netmask %s dev %s", net.toAscii().data(), mask.toAscii().data(), m_netName.toAscii().data()); system(cmdbuf);#endif bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "route add default gw %s netmask 0.0.0.0 dev %s", gw.toAscii().data(), m_netName.toAscii().data()); system(cmdbuf); //system("route"); bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "echo nameserver %s > /etc/resolv.conf", dns.toAscii().data()); system(cmdbuf);}void QTENetworkManager::saveAddr(QString ip, QString mask, QString gw, QString dns){ QSettings netSet; netSet.setValue("/Network/IP", ip); netSet.setValue("/Network/Gateway", gw); netSet.setValue("/Network/Mask", mask); netSet.setValue("/Network/DNS", dns); netSet.sync();}void QTENetworkManager::getAddr(QString &ip, QString &mask, QString &gw, QString &dns){ QSettings netSet; ip = netSet.value("/Network/IP").toString(); mask = netSet.value("/Network/Mask").toString(); gw = netSet.value("/Network/Gateway").toString(); dns = netSet.value("/Network/DNS").toString();}void QTEDhcpThread::run(){ char cmdbuf[MAX_PATH]; bzero(cmdbuf, MAX_PATH); sprintf(cmdbuf, "udhcpc -i %s", net.toAscii().data()); system(cmdbuf); emit passed(net);}void QTENetworkClearThread::run(){ static bool _bclear = false; bool bclear = false; char cmdbuf[MAX_PATH]; char cmdresult[MAX_PATH]; //设置一个合适的长度，以存储每一行输出 bzero(cmdbuf, MAX_PATH); bzero(cmdresult, MAX_PATH); sprintf(cmdbuf, "ping 222.175.114.244 -w 2 -c 1"); FILE *pp = popen(cmdbuf, "r"); //建立管道 while(fgets(cmdresult, sizeof(cmdresult), pp)) { if(strstr(cmdresult, "1 packets transmitted, 1 packets received, 0% packet loss")) bclear = true; break; } pclose(pp); if(_bclear != bclear) { if(bclear) emit cleared(); else emit notcleared(); _bclear = bclear; } return;} 0 0
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