TCP打洞问题求教 写了个打洞服务器多线程下有阻塞现象 求教
本帖最后由 cliffgao2s 于 2013-12-05 21:17:31 编辑 在写P2P多线程文件传输软件，现在就差打洞问题
我的TCP打洞原理是按照这篇帖子来的 http://blog.csdn.net/nicolas16/article/details/1763910
但是没有参考他的代码 服务器代码是自己写的
使用的基于阻塞态SOCKET 服务器LISTEN到一个CONNECT开启新线程
保持连接，并在新线程中响应打洞相关事件
单线程连接测试几个事件都是能响应的
但是多线程连接下在LOGIN-IN那个最里层循环的RECV处确一直是阻塞的
还有就是问下这思路没问题吧
通过2个MAP 记录 内网IP-NAT后SOCKADDR_IN 以及 内网IP—连接SOCKET
这样收到直接查询到服务或请求的原内网IP后直接用MAP FIND到相关参数SEND
STRUCT REGINFO 4个参数 FLAG IPSOURCE IPDST NATPORT （在不同FLAG下参数会复用对应不同数据）
flag=0 注册消息
flag=1 请求打洞消息
flag=2 SERVER向目标B发起尝试连接NAT A 请求
flag=3 目标B返回SERVER已打洞消息，触发SERVER告诉A替换IP和PORT 并连接
flag=5 最终客户端收到该消息替换IP进行连接
#include <IOSTREAM>
struct reginfo
{
int flag;
u_long IPSource;
u_long DstIP;
u_short NATPort;
}info;
struct DrillHole
{
int flag;
u_long IPSourceA;
u_long NATIPA;
u_short NATPortA;
}Hole;
struct DriveClient
{
int dflag;
u_long ReqDstIP;
u_long ipnull;
u_short natnull;
}client;
#include <afxmt.h>
#include "Exception.h"
#include "DataType.h"
#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")
#include <map>
using std::map;
typedef map<u_long,SOCKADDR_IN>m_hole; //1 原内网地址 2 外部地址*100000+外部端
typedef map<u_long, SOCKET>m_socket;
//map<u_long,u_long> m_ask; //关联请求者与被请求者的内网IP 在收到打洞请求时进行绑定
struct Cthread
{
SOCKET revv;
SOCKADDR_IN sockadd;
m_hole mhole;
m_socket mSock;
}thr;
void InitWinSock()
{
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
printf("Windows sockets 2.2 startup");
throw Exception("");
}
else{
printf("Using %s (Status: %s)\n",
wsaData.szDescription, wsaData.szSystemStatus);
printf("with API versions %d.%d to %d.%d\n\n",
LOBYTE(wsaData.wVersion), HIBYTE(wsaData.wVersion),
LOBYTE(wsaData.wHighVersion), HIBYTE(wsaData.wHighVersion));
}
}
SOCKET mksock(int type)
{
SOCKET sock = socket(AF_INET, type, 0);
if (sock < 0)
{
printf("create socket error");
throw Exception("");
}
return sock;
}
void BindSockListen(SOCKET sock)
{
sockaddr_in sin;
sin.sin_addr.S_un.S_addr = INADDR_ANY;
sin.sin_family = AF_INET;
sin.sin_port = htons(9333);
if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) < 0)
throw Exception("bind error");
}
SOCKADDR_IN FindNatIP(u_long ipsoc,m_hole mhole)
{
//mux.Lock();
m_hole::iterator ite=mhole.find(ipsoc);
//mux.Unlock();
return ite->second;
}
SOCKET FindSocket(u_long ipsoc,m_socket msocket)
{
//mux.Lock();
m_socket::iterator ite=msocket.find(ipsoc);
//mux.Unlock();
return ite->second;
}
DWORD WINAPI ListenThread(LPVOID lpParameter) //接收信息和响应消息线程
{
Cthread *inputdata=(Cthread*)lpParameter; //传入结构体参数
SOCKET lis=inputdata->revv; //与客户端通信socket
SOCKADDR_IN rev = inputdata->sockadd; //客户端NAT后地址
m_hole enumMap=inputdata->mhole;
m_socket enumSock = inputdata->mSock;
int len=sizeof(SOCKADDR);
int ret=recv(lis,(char*)&info,sizeof(reginfo),0);
if(ret>0)
{
char *showIP=inet_ntoa(rev.sin_addr); //客户端NAT后的IP
int nflag=info.flag;
if (nflag==0)
{
char *show=inet_ntoa((in_addr&)info.IPSource);
info.NATPort=rev.sin_port;//客户端IP，port存到info中
printf("Have a user log-in its infos are NAT后IP:%s and 端口: %u 原IP: %s\n",
showIP,rev.sin_port,show);
enumMap[info.IPSource]=rev; //按登陆存入用户的原内网地址以及NAT后地址与端口号
enumSock[info.IPSource] = lis;
while(1)
{
ret=recv(lis,(char*)&info,sizeof(reginfo),0);
if (ret>0)
{
int flag=info.flag;
/************************************************************************/
/* 第一步 向双方发送对方的NAT后IP 与端口
第二布 向被请求方发送信息要求与自己NAT路由协商*/
/************************************************************************/
if(flag==1)
{
char *showDst=inet_ntoa((in_addr&)info.DstIP);
printf("Get a DrillHole Request Requirer is %s and the dest PC is %s\n",showIP,showDst);
/*mux.Lock();
m_ask[info.DstIP]=info.IPSource; //以请求的目标打洞主机为KEY，关联发起打洞者 在FLAG=3是使用
mux.Unlock();*/
//DrillHole hole;
Hole.flag=2;
Hole.IPSourceA=info.IPSource;
Hole.NATIPA=FindNatIP(info.IPSource,enumMap).sin_addr.S_un.S_addr;
Hole.NATPortA=FindNatIP(info.IPSource,enumMap).sin_port;
/*下面发送请求者A的NAT后地址与端口发送给B的NAT转换后地址和端口*/
//SOCKET con=socket(AF_INET,SOCK_STREAM,0);
SOCKET sock = FindSocket(info.DstIP, enumSock);
send(sock, (char*)&Hole, sizeof(DrillHole), 0);
// SOCKADDR_IN req;
// req.sin_addr.S_un.S_addr=FindNatIP(info.DstIP,enumMap).sin_addr.S_un.S_addr;
// req.sin_port=FindNatIP(info.DstIP,enumMap).sin_port;
// req.sin_family=AF_INET;
// if (!connect(con,(SOCKADDR*)&req,len))
// {
// send(con,(char*)&Hole,sizeof(DrillHole),0);
// }
//closesocket(con);
}
if (flag==3) //被请求方B完成尝试连接NATA，告诉SERVER,SERVER告诉A连接NATB
{
//reginfo 结构体此时客户端应返回它刚试图连接的NAT后地址A和端口A
//DriveClient *drive;
printf("The DST PC has done prepare work !\n");
client.dflag=5; //可以启动到对端的TCP连接的标记
client.ReqDstIP=info.IPSource; //将被请求者(B)内网IP发给请求者作为某种确认与识别哪个打洞的消息
SOCKET conn=FindSocket(info.IPSource, enumSock);
SOCKADDR_IN ctrl;
ctrl.sin_addr.S_un.S_addr=info.DstIP; //用以向请求者NAT后地址与端口进行通信 返回相关消息
ctrl.sin_port=info.NATPort;
ctrl.sin_family=AF_INET;
send(conn, (char*)&client,sizeof(DriveClient),0);
// if(!connect(conn,(SOCKADDR*)&ctrl,len))
// {
// client.dflag=5;
//
// send(conn,(char*)&client,sizeof(DriveClient),0);
// }
// else
// {
// printf("Link Error!!!\n");
// }
// closesocket(conn);
}
}
}
}
else
{
printf("Message Type Error!\n");
}
}
/*else
{
::Sleep(1);
//printf("Recv no information,line is idiol!\n");
continue;
}*/
return 0;
}
void main()
{
m_hole enumMap;
m_socket enumSock;
/*reginfo *info;
DrillHole *Hole;*/
SOCKET PrimaryUDP;
InitWinSock();
printf("\nServer is listening...\n");
PrimaryUDP = mksock(SOCK_STREAM);
BindSockListen(PrimaryUDP);
listen(PrimaryUDP,5000);
int optval=TRUE;
//m_rev=socket(AF_INET,SOCK_STREAM,0);
SOCKADDR_IN rev;
int len=sizeof(SOCKADDR);
setsockopt(PrimaryUDP,SO_REUSEADDR,optval,(char*)&optval,sizeof(optval));
/************************************************************************/
/* 监听并响应客户端的注册与打洞响应事件 */
/************************************************************************/
while(1)
{
SOCKET m_rev=accept(PrimaryUDP,(SOCKADDR*)&rev,&len);
thr.sockadd=rev;
thr.revv=m_rev;
thr.mhole=enumMap;
thr.mSock = enumSock;
HANDLE server;
server=CreateThread(NULL,0,ListenThread,&thr,0,NULL);
CloseHandle(server);
//int ret=recv(m_rev,(char*)&info,sizeof(reginfo),0);
//closesocket(m_rev);
}
}
求救助 #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#include <io.h>
#else
#include <unistd.h>
#include <sys/time.h>
#include <pthread.h>
#define CRITICAL_SECTION pthread_mutex_t
#define _vsnprintf vsnprintf
#endif
//Log{
#define MAXLOGSIZE 20000000
#define MAXLINSIZE 16000
#include <time.h>
#include <sys/timeb.h>
#include <stdarg.h>
char logfilename1[]="MyLog1.log";
char logfilename2[]="MyLog2.log";
static char logstr[MAXLINSIZE+1];
char datestr[16];
char timestr[16];
char mss[4];
CRITICAL_SECTION cs_log;
FILE *flog;
#ifdef WIN32
void Lock(CRITICAL_SECTION *l) {
EnterCriticalSection(l);
}
void Unlock(CRITICAL_SECTION *l) {
LeaveCriticalSection(l);
}
#else
void Lock(CRITICAL_SECTION *l) {
pthread_mutex_lock(l);
}
void Unlock(CRITICAL_SECTION *l) {
pthread_mutex_unlock(l);
}
#endif
void LogV(const char *pszFmt,va_list argp) {
struct tm *now;
struct timeb tb;
if (NULL==pszFmt
[解决办法]
0==pszFmt[0]) return;
_vsnprintf(logstr,MAXLINSIZE,pszFmt,argp);
ftime(&tb);
now=localtime(&tb.time);
sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);
sprintf(timestr,"%02d:%02d:%02d",now->tm_hour ,now->tm_min ,now->tm_sec );
sprintf(mss,"%03d",tb.millitm);
printf("%s %s.%s %s",datestr,timestr,mss,logstr);
flog=fopen(logfilename1,"a");
if (NULL!=flog) {
fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);
if (ftell(flog)>MAXLOGSIZE) {
fclose(flog);
if (rename(logfilename1,logfilename2)) {
remove(logfilename2);
rename(logfilename1,logfilename2);
}
} else {
fclose(flog);
}
}
}
void Log(const char *pszFmt,...) {
va_list argp;
Lock(&cs_log);
va_start(argp,pszFmt);
LogV(pszFmt,argp);
va_end(argp);
Unlock(&cs_log);
}
//Log}
int main(int argc,char * argv[]) {
int i;
#ifdef WIN32
InitializeCriticalSection(&cs_log);
#else
pthread_mutex_init(&cs_log,NULL);
#endif
for (i=0;i<10000;i++) {
Log("This is a Log %04d from FILE:%s LINE:%d\n",i, __FILE__, __LINE__);
}
#ifdef WIN32
DeleteCriticalSection(&cs_log);
#else
pthread_mutex_destroy(&cs_log);
#endif
return 0;
}
//1-78行添加到你带main的.c或.cpp的那个文件的最前面
//81-85行添加到你的main函数开头
//89-93行添加到你的main函数结束前
//在要写LOG的地方仿照第87行的写法写LOG到文件MyLog1.log中
