网上查到，Android下的原始套接字 需要机子root之后才能使用(机子root之后到底能不能使用，我没测试过[20151103])。
PS：我看了一下，java实现的 RockSaw 的与那吗里面也是使用的jni方式。看了 jpcap-0.6.rar 的源码，貌似也是jni。
使用下面这个 Qt代码，在创建 套接字的部分 会返回错误代码（我遇到的是 errno 返回 1 或者 93）：
（工程的 AndroidManifest.xml 文件里面已经加入
“
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
”）
#include "MainWindow.h"
#include "ui_MainWindow.h"
#include <QScrollBar>
#include <QMessageBox>
#include <QDebug>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
//ui->textEdit->append();
//ui->plainTextEdit->appendPlainText();
}
MainWindow::~MainWindow()
{
delete ui;
}
int g_i01 = 0;
int g_i02 = 0;
void MainWindow::on_pbtnTextEdit_clicked()
{
//ui->textEdit->setReadOnly(true);
ui->textEdit->append(QString::number(g_i01));
g_i01 ++;
// http://www.w-cun.com/post/diaozheng_1976.htm
// http://stackoverflow.com/questions/7411761/how-to-increase-qtablewidget-vertical-scrollbar-width
int iWidth = ui->plainTextEdit->verticalScrollBar()->width();
QMessageBox::about(this, "title", QString::number(iWidth));
ui->plainTextEdit->verticalScrollBar()->setStyleSheet("QScrollBar:vertical { "+QString::number(iWidth * 2)+"px; }");
}
void MainWindow::on_pbtnPlainTextEdit_clicked()
{/*
ui->plainTextEdit->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
QScrollBar* pScrollBar = ui->plainTextEdit->verticalScrollBar();
pScrollBar->resize(pScrollBar->width() *2, pScrollBar->height());
*/
ui->lineEdit->setReadOnly(true);
ui->plainTextEdit->setReadOnly(true);
//ui->textEdit->sel
ui->plainTextEdit->appendPlainText(QString::number(g_i02));
g_i02 ++;
qDebug() << "on_pbtnPlainTextEdit_clicked";
/*
QTextCharFormat fmt;
fmt.setBackground(Qt::yellow);
QTextCursor cursor(ui->plainTextEdit->document());
cursor.setPosition(begin, QTextCursor::MoveAnchor);
cursor.setPosition(end, QTextCursor::KeepAnchor);
cursor.setCharFormat(fmt);
*/
}
int main_z();
void* thread_z(void* arg);
void MainWindow::on_pushButton_clicked()
{
pthread_t tid1 = 0;
int iRtn = pthread_create(&tid1, NULL, thread_z, &tid1);
if(iRtn != 0)
{
QString str1 = __func__;
QString str2 = strerror(iRtn);
qDebug() << str1 + str2;
}
//main_z();
QMessageBox::about(this, "on_pushButton_clicked", "after main_z");
}
void* thread_z(void* arg)
{
main_z();
}
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/if_packet.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>
#include <unistd.h> // 函数close()
#include <errno.h>
typedef struct _iphdr //定义IP首部
{
unsigned char h_verlen; //4位首部长度+4位IP版本号
unsigned char tos; //8位服务类型TOS
unsigned short total_len; //16位总长度（字节）
unsigned short ident; //16位标识
unsigned short frag_and_flags; //3位标志位
unsigned char ttl; //8位生存时间 TTL
unsigned char proto; //8位协议 (TCP, UDP 或其他)
unsigned short checksum; //16位IP首部校验和
unsigned int sourceIP; //32位源IP地址
unsigned int destIP; //32位目的IP地址
}IP_HEADER;
typedef struct _udphdr //定义UDP首部
{
unsigned short uh_sport; //16位源端口
unsigned short uh_dport; //16位目的端口
unsigned int uh_len;//16位UDP包长度
unsigned int uh_sum;//16位校验和
}UDP_HEADER;
typedef struct _tcphdr //定义TCP首部
{
unsigned short th_sport; //16位源端口
unsigned short th_dport; //16位目的端口
unsigned int th_seq; //32位序列号
unsigned int th_ack; //32位确认号
unsigned char th_lenres;//4位首部长度/6位保留字
unsigned char th_flag; //6位标志位
unsigned short th_win; //16位窗口大小
unsigned short th_sum; //16位校验和
unsigned short th_urp; //16位紧急数据偏移量
}TCP_HEADER;
typedef struct _icmphdr {
unsigned char icmp_type;
unsigned char icmp_code; /* type sub code */
unsigned short icmp_cksum;
unsigned short icmp_id;
unsigned short icmp_seq;
/* This is not the std header, but we reserve space for time */
unsigned short icmp_timestamp;
}ICMP_HEADER;
void analyseIP(IP_HEADER *ip)
{
unsigned char* p = (unsigned char*)&ip->sourceIP;
printf("Source IP : %u.%u.%u.%u
",p[0],p[1],p[2],p[3]);
p = (unsigned char*)&ip->destIP;
printf("Destination IP : %u.%u.%u.%u
",p[0],p[1],p[2],p[3]);
}
void analyseTCP(TCP_HEADER *tcp)
{
printf("TCP -----
");
printf("Source port: %u
", ntohs(tcp->th_sport));
printf("Dest port: %u
", ntohs(tcp->th_dport));
}
void analyseUDP(UDP_HEADER *udp)
{
printf("UDP -----
");
printf("Source port: %u
", ntohs(udp->uh_sport));
printf("Dest port: %u
", ntohs(udp->uh_dport));
}
void analyseICMP(ICMP_HEADER *icmp)
{
printf("ICMP -----
");
printf("type: %u
", icmp->icmp_type);
printf("sub code: %u
", icmp->icmp_code);
}
int main_z(void)
{
int sockfd;
IP_HEADER *ip;
char buf[10240];
ssize_t n;
qDebug() << "main_z in";
/* capture ip datagram without ethernet header */
//if ((sockfd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP)))== -1)
if ((sockfd = socket(PF_INET, SOCK_RAW, IPPROTO_TCP|IPPROTO_UDP|IPPROTO_ICMP))== -1)
//if ((sockfd = socket(PF_INET, SOCK_RAW, IPPROTO_IP))== -1)
//int skt = socket(AF_INET, SOCK_STREAM, 0);
{
qDebug() << "socket error : "+QString::number(errno);
printf("socket error!
");
return 1;
}
return 0;
while (1)
{
n = recv(sockfd, buf, sizeof(buf), 0);
if (n == -1)
{
printf("recv error!
");
break;
}
else if (n==0)
continue;
//接收数据不包括数据链路帧头
ip = ( IP_HEADER *)(buf);
analyseIP(ip);
size_t iplen = (ip->h_verlen&0x0f)*4;
TCP_HEADER *tcp = (TCP_HEADER *)(buf +iplen);
if (ip->proto == IPPROTO_TCP)
{
TCP_HEADER *tcp = (TCP_HEADER *)(buf +iplen);
analyseTCP(tcp);
qDebug() << "TCP";
}
else if (ip->proto == IPPROTO_UDP)
{
UDP_HEADER *udp = (UDP_HEADER *)(buf + iplen);
analyseUDP(udp);
qDebug() << "UDP";
}
else if (ip->proto == IPPROTO_ICMP)
{
ICMP_HEADER *icmp = (ICMP_HEADER *)(buf + iplen);
analyseICMP(icmp);
qDebug() << "ICMP";
}
else if (ip->proto == IPPROTO_IGMP)
{
printf("IGMP----
");
qDebug() << "IGMP";
}
else
{
printf("other protocol!
");
qDebug() << "other protocol !";
}
printf("
");
break;
}
close(sockfd);
return 0;
}