2023/12/15 work

1.? tcp 客户端、服务端通讯

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <myhead.h>

#define SERVICE_PORT 9994
#define SERVICE_IP "192.168.0.106"

int main(int argc, const char *argv[])
{
	//服务端
	//1. 创建socket
	int serviceId;
	if((serviceId = socket(AF_INET,SOCK_STREAM,0)) == -1){
		perror("service socket error");
		return -1;
	}
	//2. 绑定
	struct sockaddr_in serviceAddr;
	serviceAddr.sin_family = AF_INET;
	serviceAddr.sin_port = htons(SERVICE_PORT);
	serviceAddr.sin_addr.s_addr = inet_addr(SERVICE_IP);

	if(bind(serviceId,(struct sockaddr*)&serviceAddr,sizeof(serviceAddr)) == -1){
		perror("service bind error");
		return -1;
	}

	//3.监听
	if(listen(serviceId,128) ==-1){
		perror("service listen error");
		return -1;
	}

	printf("service success %d\n",serviceId);

	//4. 接收连接请求,接收客户端ip
	int newServiceId;
	struct sockaddr_in cliAddr;
	int cliAddrLen = sizeof(cliAddr);
	if((newServiceId = accept(serviceId,(struct sockaddr*)&cliAddr
					,&cliAddrLen)) == -1){
		perror("service accept error");
		return -1;
	}

	printf("[%s:%d]\n",inet_ntoa(cliAddr.sin_addr),ntohs(cliAddr.sin_port));
	//5. 循环接收消息
	char sbuf[120] ="";
	while(1){
		
		bzero(sbuf,sizeof(sbuf));
		//读取
		int len = recv(newServiceId,sbuf,sizeof(sbuf),0);
		printf("[%s:%d ] 客户端发送的消息 %s \n",inet_ntoa(cliAddr.sin_addr),ntohs(cliAddr.sin_port),sbuf);
		if(len == 0){
			printf("client break\n");
			break;
		}

		if(strcmp(sbuf,"tc") ==0){
			printf("service break\n");
			break;
		}

		//拼接个笑脸发送给客户端
		strcat(sbuf,"*_*");
		send(newServiceId,sbuf,sizeof(sbuf),0);
	}

	//关闭文件描述符
	close(newServiceId);
	close(serviceId);

	return 0;
}



#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <myhead.h>

#define SERVICE_PORT 9994
#define SERVICE_IP "192.168.0.106"

int main(int argc, const char *argv[])
{
	//客户端
	//1.创建socket
	int clientId;
	if((clientId = socket(AF_INET,SOCK_STREAM,0)) == -1){
		perror("client socket error");
		return -1;
	}

	//2. 客户端不绑定
	

	//3. 客户端连接服务器端
	struct sockaddr_in cliAddr;
	cliAddr.sin_family = AF_INET;
	cliAddr.sin_port = htons(SERVICE_PORT);
	cliAddr.sin_addr.s_addr = inet_addr(SERVICE_IP);
	if(connect(clientId,(struct sockaddr*)&cliAddr,sizeof(cliAddr)) == -1){
		perror("client connect error");
		return -1;
	}

	printf("client socket success\n");
	//4.发送消息给客户端及接收服务器端消息
	char cbuf[120] ="";
	while(1){
		bzero(cbuf,sizeof(cbuf));
		fgets(cbuf,sizeof(cbuf),stdin);
		//处理\n
		cbuf[strlen(cbuf) -1] = 0;

		//发送消息
		send(clientId,cbuf,sizeof(cbuf),0);

		bzero(cbuf,sizeof(cbuf));

		//接收到的消息
		int len = recv(clientId,cbuf,sizeof(cbuf),0);
		printf("[%s:%d] 服务器发送的消息 %s\n",SERVICE_IP,SERVICE_PORT,cbuf);
		if(len == 0 ){
			printf("service break\n");
			break;
		}

		if(strcmp(cbuf,"tc") == 0){
			printf("client break");
			break;
		}
	}
	
	//关闭socket流描述符
	close(clientId);

	return 0;
}

2.udp 客户端 服务器端通讯

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <myhead.h>

#define SERVICE_PORT 8889
#define SERVICE_IP "192.168.0.106"


int main(int argc, const char *argv[])
{
	//udp服务端
	//1.创建socket
	int udpService;
	if((udpService = socket(AF_INET,SOCK_DGRAM,0)) == -1){
		perror("udpService socket error");
		return -1;
	}

	//绑定
	struct sockaddr_in udpAddr;
	udpAddr.sin_family = AF_INET;
	udpAddr.sin_port = htons(SERVICE_PORT);
	//点分十进制 ip 转化成 网络套接字 
	udpAddr.sin_addr.s_addr = inet_addr(SERVICE_IP);
	if(bind(udpService,(struct sockaddr*)&udpAddr,sizeof(udpAddr)) == -1){
		perror("udpService bind error");
		return -1;
	}

	//服务端获取到客户端 ip 及端口
	struct sockaddr_in udpCliAddr;
	int udpCliAddrLen = sizeof(udpCliAddr);
	printf("udpService success\n");
	//接收/发送消息
	char ubuf[120] ="";
	while(1){

		bzero(ubuf,sizeof(ubuf));
		int len = recvfrom(udpService,ubuf,sizeof(ubuf),0,
				(struct sockaddr*)&udpCliAddr,&udpCliAddrLen);
		printf("[%s:%d] 客户端发送的消息 %s\n",inet_ntoa(udpCliAddr.sin_addr),
				ntohs(udpCliAddr.sin_port),ubuf);

		if(strcmp(ubuf,"tc") == 0){
			printf("udpService break\n");
			break;
		}
		//发送
		strcat(ubuf,"*_*");
		sendto(udpService,ubuf,sizeof(ubuf),0,(struct sockaddr*)&udpCliAddr,
				udpCliAddrLen);
	
	}

	close(udpService);

	return 0;
}


#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <myhead.h>

#define SERVICE_PORT 8889
#define SERVICE_IP "192.168.0.106"

int main(int argc, const char *argv[])
{
	//udp客户端
	//1. 创建socket
	int udpClient;
	if((udpClient = socket(AF_INET,SOCK_DGRAM,0)) == -1){
		perror("udpClient socket error");
		return -1;
	}

	struct sockaddr_in udpService;
	udpService.sin_family = AF_INET;
	udpService.sin_port = htons(SERVICE_PORT);
	udpService.sin_addr.s_addr = inet_addr(SERVICE_IP);
	//int udpLen = sizeof(udpService);
	printf("udpClient success\n");
	char ucbuf[120] ="";
	while(1){
		bzero(ucbuf,sizeof(ucbuf));
		printf("发送消息 ");
		fgets(ucbuf,sizeof(ucbuf),stdin);
		//处理\n
		ucbuf[strlen(ucbuf)-1] = 0;

		//发送
		sendto(udpClient,ucbuf,sizeof(ucbuf),0,(struct sockaddr*)&udpService,sizeof(udpService));

		bzero(ucbuf,sizeof(ucbuf));

		//接收
		int len = recvfrom(udpClient,ucbuf,sizeof(ucbuf),0,NULL,NULL);
		printf("[%s:%d] 服务端回复的消息 %s\n",SERVICE_IP,SERVICE_PORT,ucbuf);
		if(strcmp(ucbuf,"tc") == 0){
			printf("udpClient break\n");
			break;
		}

	}

	close(udpClient);
	return 0;
}

3. 思维导图