linux socket聊天程序（线程版本pthread）

最新推荐文章于 2021-05-11 02:01:06 发布

chuniyb

最新推荐文章于 2021-05-11 02:01:06 发布

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分类专栏： linux网络类文章标签： socket linux 聊天 struct server stream

本文链接：https://blog.youkuaiyun.com/chuniyb/article/details/4090610

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本文介绍了一个简单的TCP服务器和客户端程序实现。服务器端采用多线程处理多个客户端连接，并能接收和发送消息；客户端则可以与服务器进行双向通信。程序使用标准C库函数完成网络通信。

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/******************server.c*************/

#include<stdio.h>
#include<strings.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>

#define PORT 1234
#define BACKLOG 1
#define MAXDATASIZE 100

struct ARG
{
int connfd;
struct sockaddr_in client;
};
void *func(void *arg );
void main()
{
pthread_t tid;
int listenfd, connectfd;
struct sockaddr_in server;
struct sockaddr_in client;
socklen_t addrlen;
char buf[MAXDATASIZE];
struct ARG *arg, in;
arg = &in;

if((listenfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
  perror("socket() error.");
  exit(1);
}

int opt = 1;
setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));

bzero(&server, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(PORT);
server.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(listenfd, (struct sockaddr *)&server, sizeof(server)) == -1)
{
  perror("bind() error.");
  exit(1);
}
if(listen(listenfd, BACKLOG) == -1)
{
  perror("listen() error.");
  exit(1);
}

addrlen = sizeof(client);
while(1)
{
if((connectfd = accept(listenfd, (struct sockaddr *)&client, &addrlen )) == -1)
{
  perror("accept() error.");
  exit(1);
}
printf("You got a connection from client ip is: %s,port is:%d/n"
  ,inet_ntoa(client.sin_addr), htons(client.sin_port));

//arg = (struct ARG *)malloc(sizeof(struct ARG));
arg->connfd = connectfd;
arg->client = client;

if(pthread_create(&tid, NULL, func, (void *)arg))
{
  perror("error pthread_create");
  exit(1);
}
while(1)
{
  recv(connectfd, buf, MAXDATASIZE,0);
  printf("the client says: %s/n",buf);
}
close(connectfd);
close(listenfd);
}
}

void *func(void *arg)
{
char buf[MAXDATASIZE];
struct ARG *info;
info = (struct ARG *)arg;
while(1)
{

fgets(buf, MAXDATASIZE, stdin);
send(info->connfd, buf, MAXDATASIZE, 0);

}

}

//下面是客户端

//////////////////////////////////client.c///////////////////////////////////////////

#include<stdio.h>
#include<unistd.h>
#include<strings.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netdb.h>

#define PORT 1234
#define MAXDATASIZE 100

void *func(void *arg);
int main ( int argc, char *argv[])
{
pthread_t tid;
int sockfd, num;
char buf[MAXDATASIZE] ="123456789";
struct hostent *he;
struct sockaddr_in server;

if(argc!=2)
{
  printf("usage %s<ip address>/n",argv[0]);
  exit(1);
}
if((he = gethostbyname(argv[1])) == NULL)
{
  printf("gethostbyname error/n");
  exit(1);
}
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
  printf("socket() error /n");
  exit(1);
}
bzero(&server, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(PORT);
server.sin_addr = *((struct in_addr *)he->h_addr);
if(connect(sockfd, (struct sockaddr *)&server, sizeof(server)) == -1)
{
  printf("connetc() error/n");
  exit(1);
}

if(pthread_create(&tid, NULL, func, (void *)&sockfd))
{
  perror("error pthread_create");
  return 2;

}
while(1)
{

  num= recv(sockfd, buf, MAXDATASIZE, 0);
  printf("server message: %s/n",buf);
}
close(sockfd);
}

void *func(void *arg)
{
int *sockfd;
char buf[MAXDATASIZE];
sockfd = (int *)arg;
while(1)
{
fgets(buf, MAXDATASIZE, stdin);
send(*sockfd, buf, MAXDATASIZE, 0);
}
}