linux下的tcp的server和client编程
/* tcpcli.c */ #include#include
#include
#include
#include
#include
#include
#include
#define DEFAULT_PORT 8800
int main(int argc, char** argv)
{
int cPort = DEFAULT_PORT;
int cClient = 0;
int cLen = 0;
struct sockaddr_in cli;
char cbuf = {0};
if(argc < 2)
{
printf("Uasge: client\n");
return -1;
}
memset(cbuf, 0,> cli.sin_family = AF_INET;
cli.sin_port = htons(cPort);
cli.sin_addr.s_addr = inet_addr(argv);
cClient = socket(AF_INET, SOCK_STREAM, 0);
if(cClient < 0)
{
printf("socket() failure!\n");
return -1;
}
if(connect(cClient, (struct sockaddr*)&cli,> {
printf("connect() failure!\n");
return -1;
}
cLen = recv(cClient, cbuf,> if((cLen < 0)||(cLen == 0))
{
printf("recv() failure!\n");
return -1;
}
printf("recv() Data From Server: [%s]\n", cbuf);
close(cClient);
return 0;
}
编译代码：gcc -o tcp_cltclient_tcp.c
执行命令：./tcp_clt 192.168.0.230
TCP scoket服务端程序代码
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
/*********************************************************************
*filename: tcpserver.c
*purpose:tcp服务端程序
********************************************************************/
int main(int argc, char ** argv)
{
int sockfd,new_fd; /* 监听socket: sock_fd,数据传输socket: new_fd */
struct sockaddr_in my_addr; /* 本机地址信息 */
struct sockaddr_in their_addr; /* 客户地址信息 */
unsigned int sin_size, myport, lisnum;
if(argv)myport = atoi(argv);
else myport = 8800;
if(argv)lisnum = atoi(argv);
else lisnum = 2;
if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
printf("socket %d ok \n",myport);
my_addr.sin_family=PF_INET;
my_addr.sin_port=htons(myport);
my_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(my_addr.sin_zero), 0);
if (bind(sockfd, (struct sockaddr *)&my_addr,> perror("bind");
exit(1);
}
printf("bind ok \n");
if (listen(sockfd, lisnum) == -1) {
perror("listen");
exit(1);
}
printf("listen ok \n");
/*
while(1) {
sin_size => if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
perror("accept");
continue;
}
printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
if (!fork()) { //子进程代码段
if (send(new_fd, "Hello, world!\n", 14, 0) == -1) {
perror("send");
close(new_fd);
exit(0);
}
}
close(new_fd); //父进程不再需要该socket
waitpid(-1,NULL,WNOHANG);//等待子进程结束，清除子进程所占用资源
}
*/
sin_size => if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
perror("accept");
exit(0);
}
printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
int step = 0;
while(1) {
charszSnd = {0};
sprintf(szSnd,"i am server [%d]\n",step);
step++;
if (send(new_fd, szSnd, strlen(szSnd), 0) == -1) {
perror("send");
close(new_fd);
break;
}
printf("send msg: %s \n",szSnd);
sleep(1);
}
exit(0);
}
}
编译指令：gcc -o tcp_srv tcpserver.c
执行服务器端程序：./tcp_srv
创建成功，绑定端口成功，监听成功后，循环发送i am server字符串。
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