UDP 打洞示例 包含 服务器 客户端

客户端示例：

#include "Net.h"#include "../p2pInfo.h"int main(){CUdp  udp;if (0!=udp.Open(16888)){printf("client udp open failed \n");    return -1;}P2P_CLIENT_INFO clientInfo;memset(&clientInfo,0,sizeof(P2P_CLIENT_INFO));clientInfo.nClientPort=16888;clientInfo.nID=0;sprintf(clientInfo.sClientIP,"%s","10.10.2.161");P2P_CMD_HEAD cmdHead;cmdHead.nCmd=P2P_CMD_REGISTER_REQ;cmdHead.nPayloadLen=sizeof(P2P_CLIENT_INFO);memcpy(cmdHead.sPayLoad,&clientInfo,sizeof(P2P_CLIENT_INFO));long lDestIP=0;CBSocket::ConvertStringToIP((int*)&lDestIP,"114.247.165.37");int nRet=0;nRet=udp.Send((unsigned char *)&cmdHead,CMD_HEAD_LEN+cmdHead.nPayloadLen,lDestIP,P2P_SERVER_PORT);printf("send register len %d \n",nRet);nRet=udp.Recv();if (nRet>0){    printf("recv data \n");}else{printf("recv P2P_CMD_REGISTER_ACK time out \n");return 0;}P2P_CLIENT_INFO remoteClientInfo;memset(&remoteClientInfo,0,sizeof(P2P_CLIENT_INFO));P2P_CMD_HEAD recvHead;memset(&recvHead,0,sizeof(P2P_CMD_HEAD));while (1){    cmdHead.nCmd=P2P_CMD_COMUNICATION_REQ;cmdHead.nValue=1;    // remote idcmdHead.nPayloadLen=sizeof(P2P_CLIENT_INFO);nRet=udp.Send((unsigned char *)&cmdHead,CMD_HEAD_LEN+cmdHead.nPayloadLen,lDestIP,P2P_SERVER_PORT);printf("send commuication len %d \n",nRet);nRet=udp.Recv();if (nRet>0){memcpy(&recvHead,udp.GetBuffer(),nRet);if (0==recvHead.nValue){    memcpy(&remoteClientInfo,recvHead.sPayLoad,sizeof(P2P_CLIENT_INFO));printf("recv P2P_CMD_COMUNICATION_ACK remote ip:%s port:%d\n",remoteClientInfo.sClientPublicIP,remoteClientInfo.nClientPublicPort);break;}usleep(100*1000);}else{printf("recv P2P_CMD_COMUNICATION_ACK time out \n");}}// send udp hole to remote ipCBSocket::ConvertStringToIP((int*)&lDestIP,remoteClientInfo.sClientPublicIP);cmdHead.nCmd=P2P_CMD_UDP_HOLE_REQ;cmdHead.nPayloadLen=0;udp.Send((unsigned char *)&cmdHead,CMD_HEAD_LEN,lDestIP,remoteClientInfo.nClientPublicPort);usleep(1000*1000);udp.Send((unsigned char *)&cmdHead,CMD_HEAD_LEN,lDestIP,remoteClientInfo.nClientPublicPort);usleep(1000*1000);udp.Send((unsigned char *)&cmdHead,CMD_HEAD_LEN,lDestIP,remoteClientInfo.nClientPublicPort);nRet=udp.Recv();if (nRet>0){memcpy(&recvHead,udp.GetBuffer(),nRet);if (recvHead.nCmd==P2P_CMD_UDP_HOLE_ACK || recvHead.nCmd==P2P_CMD_UDP_HOLE_REQ){    printf("recv P2P_CMD_UDP_HOLE  udp hole success\n");}}else{printf("P2P_CMD_UDP_HOLE recv out \n");return 0;}return 0;}

服务器端示例: 

#include "Net.h"#include "../p2pInfo.h"#define MAX_CLIENT_COUNT 16P2P_CLIENT_INFO* pClientList[MAX_CLIENT_COUNT];void AddClient(P2P_CLIENT_INFO* pClientInfo){for(int i=0;i<MAX_CLIENT_COUNT;i++){if (!pClientList[i]){    P2P_CLIENT_INFO* pClient=new P2P_CLIENT_INFO;memcpy(pClient,pClientInfo,sizeof(P2P_CLIENT_INFO));pClientList[i]=pClient;return;}}}P2P_CLIENT_INFO* FindClient(int nID){for(int i=0;i<MAX_CLIENT_COUNT;i++){if (pClientList[i]){    if (nID==pClientList[i]->nID)    {        return pClientList[i];    }}}return NULL;}P2P_CLIENT_INFO* FindClient(long ip, unsigned short nPort){for(int i=0;i<MAX_CLIENT_COUNT;i++){if (pClientList[i]){int nIp=0;CBSocket::ConvertStringToIP(&nIp,pClientList[i]->sClientPublicIP);    if (nPort==pClientList[i]->nClientPublicPort && ip==nIp)    {        return pClientList[i];    }}}return NULL;}int main(){CUdp udp;udp.Open(P2P_SERVER_PORT);int nRet=0;P2P_CMD_HEAD* pCmdHead=new P2P_CMD_HEAD;P2P_CMD_HEAD* pSendCmdHead=new P2P_CMD_HEAD;memset(pCmdHead,0,sizeof(P2P_CMD_HEAD));memset(pSendCmdHead,0,sizeof(P2P_CMD_HEAD));long lRemoteIP=0;unsigned short nRemotePort=0;int i=0;for (i = 0; i <16; i++){    pClientList[i]=NULL;}while (1){    nRet=udp.Recv(lRemoteIP,nRemotePort);if (nRet>0){    memcpy(pCmdHead,udp.GetBuffer(),nRet);switch (pCmdHead->nCmd){    case P2P_CMD_REGISTER_REQ:        {printf("recv register req \n");P2P_CLIENT_INFO* pClient=(P2P_CLIENT_INFO*)pCmdHead->sPayLoad;CBSocket::ConvertIPToString(lRemoteIP,pClient->sClientPublicIP);pClient->nClientPublicPort=nRemotePort;AddClient(pClient);printf("recv command P2P_CMD_REGISTER_REQ from ip:%s port:%d\n",pClient->sClientPublicIP,pClient->nClientPublicPort);pSendCmdHead->nCmd=P2P_CMD_REGISTER_ACK;pSendCmdHead->nPayloadLen=sizeof(P2P_CLIENT_INFO);memcpy(pSendCmdHead->sPayLoad,pClient,sizeof(P2P_CLIENT_INFO));udp.Send((unsigned char *)pSendCmdHead,CMD_HEAD_LEN+pSendCmdHead->nPayloadLen,lRemoteIP,nRemotePort);    }        break;    case P2P_CMD_COMUNICATION_REQ:        {printf("recv command P2P_CMD_COMUNICATION_REQ\n");P2P_CLIENT_INFO* pTargetClientInfo=FindClient(pCmdHead->nValue);if (!pTargetClientInfo){printf("not find client info id:%d\n",pCmdHead->nValue);    continue;}pSendCmdHead->nCmd=P2P_CMD_COMUNICATION_ACK;pSendCmdHead->nPayloadLen=sizeof(P2P_CLIENT_INFO);memcpy(pSendCmdHead->sPayLoad,pTargetClientInfo,sizeof(P2P_CLIENT_INFO));udp.Send((unsigned char *)pSendCmdHead,CMD_HEAD_LEN+pSendCmdHead->nPayloadLen,lRemoteIP,nRemotePort);// send to remote clientint nIP=0;P2P_CLIENT_INFO* pSelfClientInfo=FindClient(lRemoteIP,nRemotePort);if (pSelfClientInfo){printf("find self client info ip:%s\n",pSelfClientInfo->sClientPublicIP);memcpy(pSendCmdHead->sPayLoad,pSelfClientInfo,sizeof(P2P_CLIENT_INFO));CBSocket::ConvertStringToIP(&nIP,pTargetClientInfo->sClientPublicIP);udp.Send((unsigned char *)pSendCmdHead,CMD_HEAD_LEN+pSendCmdHead->nPayloadLen,nIP,pTargetClientInfo->nClientPublicPort);}else{printf("not find self client info");}    }        break;    default:        break;}}else{printf("udp recv time out \n");}}return 0;}

示例下载地址:    http://download.csdn.net/detail/mtour/8119489