tcp多线程源代码（自存）

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <pthread.h>

#define BUF_SIZE 1024
int listen_sock = 0;

char message[BUF_SIZE] = {0};
socklen_t clnt_addr_sz;
struct sockaddr_in serv_addr, clnt_addr;
int n = 0;
pthread_t tid;
int *pconnect_fd;

void *do_client(void *arg)
{
	int connect_sock = *(int *)arg;
	if (connect_sock < 0)
		{
			perror("Fail to accept");
			exit(EXIT_FAILURE);
		}
		printf("==================================\n");
		printf("connect_sock: %d\n",connect_sock);
		printf("client IP: %s\n",inet_ntoa(clnt_addr.sin_addr));
		printf("client port: %d\n",ntohs(clnt_addr.sin_port));

		while(1)
		{
		
			memset(message,0,sizeof(message));
			clnt_addr_sz=sizeof(clnt_addr);

			n = recv(connect_sock, message, sizeof(message),0);

			if (n<0)
			{
				perror("Fail to recv");
				exit(EXIT_FAILURE);
			}
			else if(n == 0)
			{
				printf("client is not connect\n");
				exit(EXIT_FAILURE);
			}
			printf("recv %d bytes: %s\n",n,message);



			n = send(connect_sock, message, sizeof(message),0);
			if (n<0)
			{
				perror("Fail to send");
				exit(EXIT_FAILURE);
			}
			else if(n == 0)
			{
				printf("client is not connect");
				exit(EXIT_FAILURE);
			}



			if (strncmp(message,"quit",4) == 0)
				break;

		}
		free(arg);

}
void error_handling(char *message);

int main(int argc, char *argv[])
{

	if(argc!=3)
	{
		printf("Usage: %s <port>\n", argv[0]);
		exit(1);
	}

	
	listen_sock=socket(AF_INET, SOCK_STREAM, 0);         //创建一个面向消息类型的套接字,注意第二个实参SOCK_DGRAM
	if(listen_sock==-1)
		error_handling("UDP socket creation error");

	memset(&serv_addr, 0, sizeof(serv_addr));
	serv_addr.sin_family=AF_INET;
	serv_addr.sin_addr.s_addr=inet_addr(argv[1]);
	serv_addr.sin_port=htons(atoi(argv[2]));

	
	clnt_addr_sz = sizeof(clnt_addr);
	if (bind(listen_sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr))==-1)  //将通信地址信息绑定到套接字上，构成UDP套接字
		error_handling("bind() error");

	
	if ( listen(listen_sock,5) == -1)
	{
		perror("Fail to listen");
		exit(EXIT_FAILURE);
	}
	printf("Listen...\n");
	n = sizeof(serv_addr);
	
	int ret = 0;
	while(1)
	{	
		pconnect_fd = (int *)malloc(sizeof(int));
		*pconnect_fd = accept(listen_sock,(struct sockaddr*)&clnt_addr,&clnt_addr_sz);
		ret = pthread_create(&tid,NULL,do_client,(void*)pconnect_fd);
		
		if (ret != 0)
		{
			perror("Fail to pthread_create");
			return -1;
		}
		pthread_detach(tid);
	}
	

	close(listen_sock);
	return 0;
}

void error_handling(char *message)
{
	fputs(message, stderr);
	fputc('\n', stderr);
	exit(1);
}