#define HOST_PORT 10000 int main() { WORD wVersionRequested; WSADATA wsaData; int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { /* Tell the user that we could not find a usable */ /* WinSock DLL. */ return; }
/* Confirm that the WinSock DLL supports 2.2.*/ /* Note that if the DLL supports versions greater */ /* than 2.2 in addition to 2.2, it will still return */ /* 2.2 in wVersion since that is the version we */ /* requested. */
if ( LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 2 ) { /* Tell the user that we could not find a usable */ /* WinSock DLL. */ WSACleanup( ); return; } int clientfd = socket(AF_INET, SOCK_STREAM, 0); if(clientfd < 0) { printf("client create socket failed.\n"); return 0; } int on = 1; if(setsockopt(clientfd, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)) < 0) { printf("set socket option failed.\n"); return 0; } struct sockaddr_in servaddr; memset(&servaddr, 0, sizeof(servaddr));
#define MAX_LISTEN_QUEUE_NUMBER 10 #define HOST_PORT 10000 #define MAX_PACKET_LENGTH 1400 int main() { WORD wVersionRequested; WSADATA wsaData; int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { /* Tell the user that we could not find a usable */ /* WinSock DLL. */ return 0; }
/* Confirm that the WinSock DLL supports 2.2.*/ /* Note that if the DLL supports versions greater */ /* than 2.2 in addition to 2.2, it will still return */ /* 2.2 in wVersion since that is the version we */ /* requested. */
if ( LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 2 ) { /* Tell the user that we could not find a usable */ /* WinSock DLL. */ WSACleanup( ); return 0; }
int clientRecord[FD_SETSIZE]; int index = 0; for(; index < FD_SETSIZE; index++) clientRecord[index] = -1; fd_set readSet; FD_ZERO(&readSet); FD_SET(servfd,&readSet); int maxfd = servfd;
//tcpserver.cc
#include <iostream>
#include <cstring>
#include <strings.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
using namespace std;
int main(int argc, char *argv[])
{
//创建套接字
int sk = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in server;
bzero(&server, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(atoi(argv[1]));
server.sin_addr.s_addr = htonl(INADDR_ANY);
//端口绑定
bind(sk, (struct sockaddr*)&server, sizeof(server));
//监听
listen(sk, 5);
struct sockaddr_in client;
bzero(&client, sizeof(client));
size_t len = sizeof(client);
//接受连接请求
int talk = accept(sk, (struct sockaddr*)&client, &len);
//发送数据
send(talk, "Hello", strlen("Hello") + 1, 0);
//接收数据
char buff[1024] = {'\0'};
recv(talk, buff, sizeof(buff), 0);
cout << buff << endl;
//关闭套接字
close(talk);
close(sk);
return 0;
}
//tcpclient.cc
#include <iostream>
#include <cstring>
#include <strings.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
using namespace std;
int main(int argc, char *argv[])
{
//创建套接字
int sk = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in server;
server.sin_family = AF_INET;
server.sin_port = htons(atoi(argv[2]));
server.sin_addr.s_addr = inet_addr(argv[1]);
//连接服务器
connect(sk, (struct sockaddr*)&server, sizeof(server));
char buff[1024] = {'\0'};
//接收数据
recv(sk, buff, sizeof(buff), 0);
cout << buff << endl;
//发送数据
send(sk, "I am hahaya", strlen("I am hahaya") + 1, 0);
//关闭套接字
close(sk);
return 0;
} tcpclient:
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <string.h>
#define HOST_PORT 10000
int main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
return;
}
/* Confirm that the WinSock DLL supports 2.2.*/
/* Note that if the DLL supports versions greater */
/* than 2.2 in addition to 2.2, it will still return */
/* 2.2 in wVersion since that is the version we */
/* requested. */
if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 2 )
{
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
WSACleanup( );
return;
}
int clientfd = socket(AF_INET, SOCK_STREAM, 0);
if(clientfd < 0)
{
printf("client create socket failed.\n");
return 0;
}
int on = 1;
if(setsockopt(clientfd, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)) < 0)
{
printf("set socket option failed.\n");
return 0;
}
struct sockaddr_in servaddr;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(HOST_PORT);
servaddr.sin_addr.S_un.S_addr = inet_addr("192.168.1.56");
char buf[BUFSIZ];
memset(buf,0,BUFSIZ);
strncpy(buf,"shawn's client",14);
//buf[BUFSIZ] = '\0';
if(connect(clientfd,(const struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
{
printf("%d\n",errno);
return 0;
}
int index = 0;
for(index = 0; index < 5; index++)
{
send(clientfd,buf,strlen(buf) + 1, 0);
_sleep(10);
}
memset(buf,0,BUFSIZ);
strcpy(buf,"end");
send(clientfd,buf,strlen(buf) + 1, 0);
closesocket(clientfd);
getchar();
return 0;
}
tcpserver.c:
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#define MAX_LISTEN_QUEUE_NUMBER 10
#define HOST_PORT 10000
#define MAX_PACKET_LENGTH 1400
int main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
return 0;
}
/* Confirm that the WinSock DLL supports 2.2.*/
/* Note that if the DLL supports versions greater */
/* than 2.2 in addition to 2.2, it will still return */
/* 2.2 in wVersion since that is the version we */
/* requested. */
if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 2 )
{
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
WSACleanup( );
return 0;
}
int servfd, clientfd;
servfd = socket(AF_INET, SOCK_STREAM, 0);
if(servfd < 0)
{
printf("server create socket failed.\n");
return 0;
}
int on = 1;
if(setsockopt(servfd, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)) < 0)
{
printf("set socket option failed.\n");
return 0;
}
struct sockaddr_in servaddr;
struct sockaddr_in clientaddr;
memset(&servaddr,0,sizeof(servaddr));
memset(&clientaddr,0,sizeof(clientaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(HOST_PORT);
servaddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
if(bind(servfd, (const struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
{
printf("bind failed.\n");
return 0;
}
if(listen(servfd,10) < 0)
{
printf("listen failed.\n");
return 0;
}
char buf[MAX_PACKET_LENGTH];
memset(buf,0,MAX_PACKET_LENGTH);
int length = sizeof(clientaddr);
int clientRecord[FD_SETSIZE];
int index = 0;
for(; index < FD_SETSIZE; index++)
clientRecord[index] = -1;
fd_set readSet;
FD_ZERO(&readSet);
FD_SET(servfd,&readSet);
int maxfd = servfd;
for(;;)
{
struct timeval time;
time.tv_sec = 10;
time.tv_usec = 0;
if(select(maxfd,&readSet,NULL,NULL,&time) <= 0)
continue;
if(FD_ISSET(servfd,&readSet))
{
clientfd = accept(servfd, (struct sockaddr *)&clientaddr,&length);
for(index = 0; index < FD_SETSIZE; index++)
{
if(clientRecord[index] < 0)
{
clientRecord[index] = clientfd;
break;
}
}
if(index == FD_SETSIZE)
{
printf("too many sockets.\n");
break;
}
}
for(index = 0; index < FD_SETSIZE; index++)
{
if(clientRecord[index] > 0)
{
FD_SET(clientRecord[index],&readSet);
maxfd = maxfd > clientRecord[index] ? maxfd : clientRecord[index];
}
else
break;
}
int sockfd;
for(index = 0; index < FD_SETSIZE; index++)
{
if((sockfd = clientRecord[index]) < 0)
continue;
if(FD_ISSET(sockfd,&readSet))
{
while(1)
{
recv(sockfd,buf,MAX_PACKET_LENGTH,0);
printf("%s\n",buf);
if(strcmp(buf,"end") == 0)
break;
}
closesocket(sockfd);
clientRecord[index] = -1;
}
}
}
closesocket(servfd);
return 0;
}
我在做一个聊天室设计, 用C++ Winsock, 客户端和客户端可以对话, 但是要通过服务器转发, 服务器提供管理客户端用户功能, 现在不知道怎么转发。谢谢你的提示，我就是用UDP的。