2024.8.20

#include <stdio.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pthread.h>

void *recv_opp(void *arg)
{
	int sock_fd = *(int *)arg;
	char *buf = malloc(100);
	while(1)
	{
		memset(buf,0,100);
		int n = recv(sock_fd,buf,100,0);
		if(n != 0)
		{
			printf("服务器:%s",buf);
		}
	}
}



int main(int argc,char **argv)
{
	//1.创建套接字
	int sock_fd = socket(AF_INET,SOCK_STREAM,0);
	//2.绑定
	
	struct sockaddr_in serve_addr;
	serve_addr.sin_family = AF_INET;
	serve_addr.sin_port = htons(atoi(argv[2]));//网络字节序-----主机字节序
	serve_addr.sin_addr.s_addr = inet_addr(argv[1]);//网络字节序
	
	socklen_t serve_len = sizeof(serve_addr);
	
	bind(sock_fd, (struct sockaddr *)&serve_addr,serve_len);
	
	
	//3.发起连接请求
	connect(sock_fd,(struct sockaddr *)&serve_addr,serve_len);
	
	char *buf = malloc(100);
	pthread_t tid;
	pthread_create(&tid,NULL,recv_opp, (void *)&sock_fd);
	while(1)
	{
		memset(buf,0,100);
		//4.发消息
		fgets(buf,100,stdin);
		
		send(sock_fd,buf,100,0);
	}

	
}
#include <stdio.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pthread.h>

int con_fd = -1;
void *send_opp(void *arg)
{
	int fd = con_fd;
	char *buf = malloc(100);
	while(1)
	{
		memset(buf,0,100);
		fgets(buf,100,stdin);
		send(fd,buf,100,0);
	}
}
/*tcp协议客户端服务器CS结构的通信（打印客户端的IP和端口号，客户端能够多次运行）*/
void *nv_shen(void *arg)
{
	int fd = con_fd;
	struct sockaddr_in addr = *(struct sockaddr_in *)arg;
	
	char *buf = malloc(100);
	while(1)
	{
		
		memset(buf,0,100);
		int n = recv(fd,buf,100,0);//recv和send配套阻塞
		if(n == 0)
		{
			printf("【端口号：[%d],%s】 : 已退出\n", ntohs(addr.sin_port), inet_ntoa(addr.sin_addr));
			break;
		}
		printf("【端口号：[%d],%s】 : %s\n", ntohs(addr.sin_port), inet_ntoa(addr.sin_addr),buf );
		
		
		
	}
		
}



int main(int argc,char **argv)
{
	//1.创建套接字
	int sock_fd = socket(AF_INET,SOCK_STREAM,0);
	//2.绑定
	
	struct sockaddr_in serve_addr, cilent_addr;//
	serve_addr.sin_family = AF_INET;
	serve_addr.sin_port = htons(atoi(argv[2]));//网络字节序-----主机字节序
	serve_addr.sin_addr.s_addr = inet_addr(argv[1]);//网络字节序
	
	socklen_t serve_len = sizeof(serve_addr);
	socklen_t cilent_len = sizeof(cilent_addr);
	
	bind(sock_fd, (struct sockaddr *)&serve_addr,serve_len);
	
	//3.监听
	listen(sock_fd,4);
	printf("%d",con_fd);
	//创建线程
	pthread_t tid1,tid2;
	char *buf = malloc(100);
	//5.接收消息
	while(1)
	{
		
		//4.等待连接
		
		printf("等待连接...\n");
		con_fd = accept(sock_fd, (struct sockaddr *)&cilent_addr, &cilent_len);//阻塞运行
		//有对端地址，怎么访问到？
		cilent_addr.sin_port;
		
		printf("端口号：[%d],%s连接成功...\n", ntohs(cilent_addr.sin_port), inet_ntoa(cilent_addr.sin_addr) );
		
		pthread_create(&tid1,NULL,nv_shen,  (void *)&cilent_addr);
		pthread_create(&tid2,NULL,send_opp, NULL);
	}
}