send 函数 的问题，求高人解释
这个是基于ipv6 的tcp 通信的一个小软件，不知道怎么搞得最后发送结果无法显示
// Ipv6TcpSrvDlg.cpp : 实现文件
//
#include "stdafx.h"
#include "Ipv6TcpSrv.h"
#include "Ipv6TcpSrvDlg.h"
#include "afxdialogex.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
#include <winsock2.h>
#include <ws2tcpip.h>
#include <tpipv6.h> //可以从tpipv6-001205-SP3-IE6安装后所在目录里找到
#pragma comment(lib,"ws2_32") //引入库函数
#define BuffSize 1024
SOCKET s;//发送和接收的Socket
SOCKADDR_IN6 addrSrv;
struct addrinfo hints,*res =NULL;
bool Flag = false;
// 用于应用程序“关于”菜单项的 CAboutDlg 对话框
class CAboutDlg : public CDialogEx
{
public:
CAboutDlg();
// 对话框数据
enum { IDD = IDD_ABOUTBOX };
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持
// 实现
protected:
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()
// CIpv6TcpSrvDlg 对话框
CIpv6TcpSrvDlg::CIpv6TcpSrvDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CIpv6TcpSrvDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
m_localaddr = _T("::1");
m_romoaddr = _T("::1");
m_message = _T("");
}
void CIpv6TcpSrvDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
DDX_Control(pDX, IDC_MessageList, m_ctlMessagelist);
DDX_Control(pDX, IDC_CreateConnect, m_createconnect);
DDX_Control(pDX, IDC_Disconnect, m_disconnect);
DDX_Text(pDX, IDC_LocalAddr, m_localaddr);
DDX_Text(pDX, IDC_Message, m_message);
DDX_Text(pDX, IDC_RomoAddr, m_romoaddr);
DDX_Control(pDX, IDC_SendMessage, m_sendmessage);
}
BEGIN_MESSAGE_MAP(CIpv6TcpSrvDlg, CDialogEx)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_CreateConnect, &CIpv6TcpSrvDlg::OnBnClickedCreateconnect)
ON_BN_CLICKED(IDC_Disconnect, &CIpv6TcpSrvDlg::OnBnClickedDisconnect)
ON_BN_CLICKED(IDC_Quit, &CIpv6TcpSrvDlg::OnBnClickedQuit)
ON_BN_CLICKED(IDC_SendMessage, &CIpv6TcpSrvDlg::OnBnClickedSendmessage)
END_MESSAGE_MAP()
// CIpv6TcpSrvDlg 消息处理程序
BOOL CIpv6TcpSrvDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
// 将“关于...”菜单项添加到系统菜单中。
// IDM_ABOUTBOX 必须在系统命令范围内。
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
BOOL bNameValid;
CString strAboutMenu;
bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
ASSERT(bNameValid);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
// 执行此操作
SetIcon(m_hIcon, TRUE);// 设置大图标
SetIcon(m_hIcon, FALSE);// 设置小图标
// TODO: 在此添加额外的初始化代码
m_sendmessage.EnableWindow(FALSE);
m_createconnect.EnableWindow(TRUE);
m_disconnect.EnableWindow(FALSE);
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
return TRUE; // 除非将焦点设置到控件，否则返回 TRUE
}
void CIpv6TcpSrvDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialogEx::OnSysCommand(nID, lParam);
}
}
// 如果向对话框添加最小化按钮，则需要下面的代码
// 来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
// 这将由框架自动完成。
void CIpv6TcpSrvDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // 用于绘制的设备上下文
SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);
// 使图标在工作区矩形中居中
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// 绘制图标
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialogEx::OnPaint();
}
}
//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CIpv6TcpSrvDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}
DWORD CALLBACK RecvProc(void *pWnd)
{
CIpv6TcpSrvDlg &dlg = *(CIpv6TcpSrvDlg *)pWnd;
int RecvLen; //接受字节数
char RecvBuff[BuffSize+1]; //接受缓冲区
SOCKADDR_IN6 addrClient; //IPv6地址结构
int AddrLen; //地址长度
CString strMessage;
AddrLen = sizeof (addrClient);
ZeroMemory(&addrClient, sizeof(addrClient));
while(Flag)
{
SOCKET sock= accept(s,(SOCKADDR*)&addrClient,&AddrLen);
RecvLen = recv(sock,RecvBuff+1,BuffSize,0); //由于recvfrom不正常,这里改用recv
if (RecvLen>0)
{
RecvBuff[RecvLen] = '\0';
strMessage.Format("Received:%s",RecvBuff);
dlg.m_ctlMessagelist.SendMessage(LB_INSERTSTRING,-1,WPARAM((LPCTSTR)strMessage));
}
}
return 1;
}
void CIpv6TcpSrvDlg::OnBnClickedCreateconnect()
{
// TODO: 在此添加控件通知处理程序代码
int ret;
UpdateData(TRUE);
memset(&hints,0,sizeof(hints));
hints.ai_flags=AI_PASSIVE;
hints.ai_family=AF_INET6;
hints.ai_socktype=SOCK_STREAM;
hints.ai_protocol=IPPROTO_TCP ;
ret = getaddrinfo(m_localaddr,"3000",&hints,&res); //解析本机IPv6地址
if (ret!=0)
{
AfxMessageBox("解析本机IPv6地址失败");
return;
}
s =socket(AF_INET6,SOCK_STREAM,IPPROTO_TCP);
if (s==INVALID_SOCKET)
{
AfxMessageBox("建立SOCKET失败");
return;
}
else
{
AfxMessageBox("建立SOCKET成功");
ret = bind(s,res->ai_addr,res->ai_addrlen); //绑定监听端口
if (ret == SOCKET_ERROR)
{
AfxMessageBox("绑定SOCKET失败");
return;
}
else
{
AfxMessageBox("绑定SOCKET成功");
m_createconnect.EnableWindow(FALSE);
m_disconnect.EnableWindow(TRUE);
m_sendmessage.EnableWindow(TRUE);
}
}
listen(s,SOMAXCONN);
DWORD ThreadID;
Flag = true;
CreateThread(NULL,
0,
RecvProc,
this,
0,
&ThreadID);
}
void CIpv6TcpSrvDlg::OnBnClickedDisconnect()
{
// TODO: 在此添加控件通知处理程序代码
Flag= false;
closesocket(s);
m_createconnect.EnableWindow(TRUE);
m_disconnect.EnableWindow(FALSE);
m_sendmessage.EnableWindow(FALSE);
}
void CIpv6TcpSrvDlg::OnBnClickedQuit()
{
// TODO: 在此添加控件通知处理程序代码
Flag = false;
closesocket(s);
WSACleanup();
freeaddrinfo(res);
EndDialog(1);
}
void CIpv6TcpSrvDlg::OnBnClickedSendmessage()
{
// TODO: 在此添加控件通知处理程序代码
int ret;
UpdateData(TRUE);
memset(&hints,0,sizeof(hints));
hints.ai_family=AF_INET6;
hints.ai_socktype=SOCK_STREAM;
hints.ai_protocol=IPPROTO_TCP;
hints.ai_flags=AI_PASSIVE;
connect(s ,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
ret = getaddrinfo(m_romoaddr,"3000",&hints,&res); //解析远程接受主机IPv6地址
if (ret != 0)
{
AfxMessageBox("解析远程IPv6地址失败");
return;
}
else
{
int a= send(s,m_message,m_message.GetLength()+1,0);
}
}
[解决办法]
WSAGetLastError()的值是什么？
[解决办法]
m_message 是个MFC的CString对象吧，这样的东西是不方便在网络上传送的
你应该发送char *的数据(字节码数据)
