tcp简单实验
server.c
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h> /*socket
* bind
* listen
* accept
* send/recv
*/ #define SERVER_PORT 8888
#define BACKLOG 10 int main(int argc, char **argv)
{
int iSocketServer;
int iSocketClient;
struct sockaddr_in tSocketServerAddr;
struct sockaddr_in tSocketClientAddr;
int iRet;
int iAddrLen; int iRecvLen;
unsigned char ucRecvBuf[1000]; //接收缓冲区 int iClientNum = -1; signal(SIGCHLD,SIG_IGN); //等待为子进程收尸信号 /* AF_INET为ipv4类型，SOCK_STREAM为Tcp连接类型，*/
iSocketServer = socket(AF_INET, SOCK_STREAM, 0); if( -1 == iSocketServer)
{
printf("socket error!\n");
return -1;
} tSocketServerAddr.sin_family = AF_INET;
tSocketServerAddr.sin_port = htons(SERVER_PORT); /* host to net ,short */
tSocketServerAddr.sin_addr.s_addr = INADDR_ANY; /* 本机上的所有IP */
memset(tSocketServerAddr.sin_zero, 0, 8); /* 设置无用的空间为0 */
//配置本地信息iRet = bind(iSocketServer, (const struct sockaddr *)&tSocketServerAddr, sizeof(struct sockaddr));
if( -1 == iRet)
{
printf("bind error!\n");
return -1;
}
//最大监听个数BACKLOG
iRet = listen(iSocketServer, BACKLOG);
if( -1 == iRet)
{
printf("listen error!\n");
return -1;
} while(1)
{
iAddrLen = sizeof(struct sockaddr);
iSocketClient = accept(iSocketServer, (struct sockaddr *)&tSocketClientAddr, &iAddrLen);
if (-1 != iSocketClient)
{
iClientNum++;
printf("Get connect from client %d : %s\n", iClientNum, inet_ntoa(tSocketClientAddr.sin_addr));
if(!fork())
{
/* 子进程的源码 */
while(1)
{
/* 接收客户端信息并打印出来 */
iRecvLen = recv(iSocketClient, ucRecvBuf, 999, 0);
if(iRecvLen <= 0)
{
close(iSocketClient);
return -1;
}
else
{
ucRecvBuf[iRecvLen] = '\0';
printf("Get Msg From Client %d: %s\n", iClientNum, ucRecvBuf);
}
}
}
}
} close(iSocketServer);
return 0;
}
client.c
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h> /*socket
* connet
* send/recv
*/
#define SERVER_PORT 8888 int main(int argc, char **argv)
{
int iSocketClient;
struct sockaddr_in tSocketServerAddr; int iRet;
unsigned char ucSendBuf[1000];
int iSendLen; if(argc != 2)
{
printf("Usage:\n");
printf("%s<server_ip>\n", argv[0]);
return -1;
} iSocketClient = socket(AF_INET, SOCK_STREAM, 0); tSocketServerAddr.sin_family = AF_INET;
tSocketServerAddr.sin_port = htons(SERVER_PORT); /* host to net ,short */
if(0 == inet_aton(argv[1], &tSocketServerAddr.sin_addr)) /* 本机上的所有IP */
{
printf("invalid server_ip\n");
return -1;
}
memset(tSocketServerAddr.sin_zero, 0, 8); /* 设置无用的空间为0 */ iRet = connect(iSocketClient, (struct sockaddr *)&tSocketServerAddr, sizeof(struct sockaddr)); if(iRet == -1)
{
printf("connect error!\n");
return -1;
} while(1)
{
if(fgets(ucSendBuf, 999, stdin))
{
iSendLen = send(iSocketClient, ucSendBuf, strlen(ucSendBuf), 0);
if(iSendLen <= 0)
{
close(iSocketClient);
return -1;
}
}
} return 0;
}