网络编程day2

将TCP服务器客户端的代码再写一遍上交

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define ERR_MSG(msg)                          \
    do                                        \
    {                                         \
        fprintf(stderr, "line:%d", __LINE__); \
        perror(msg);                          \
    } while (0)
#define IP "192.168.8.253"
#define PORT 6666
int main(int argc, const char *argv[])
{
    int cfd = socket(AF_INET, SOCK_STREAM, 0);
    if (cfd < 0)
    {
        ERR_MSG("socket");
        return -1;
    }
    printf("socket success __%d__\n",__LINE__);
    int reuse=1;
    if(setsockopt(cfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0)
    {
        ERR_MSG("setsockopt");
        return -1;
    }
    printf("允许快速重用端口成功 __%d__\n",__LINE__);
    struct sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(PORT);
    sin.sin_addr.s_addr = inet_addr(IP);
     if(connect(cfd, (struct sockaddr *)&sin, sizeof(sin))<0)
    {
        ERR_MSG("connect");
        return -1;
    }
    printf("connect success __%d__\n", __LINE__);
    char buf[128] = "";
    ssize_t res = 0;
    while (1)
    {
        bzero(buf, sizeof(buf));
		printf("please puts>>>");
		fgets(buf,sizeof(buf),stdin);
		buf[strlen(buf)-1]=0;
		if(write(cfd,buf,sizeof(buf))<0)
           {
               ERR_MSG("send");
               return -1;
           }

        res = read(cfd, buf, sizeof(buf));
        if (res < 0)
        {
            ERR_MSG("recv");
            return -1;
        }
		else if(0==res)
		{
			printf("cfd=%d 客户端已下线 __%d__\n",cfd,__LINE__);
			break;
		}
        printf("cfd=%d %s __%d__\n",cfd,buf,__LINE__);

将UDP服务器客户端的代码再写一遍上交

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define ERR_MSG(msg)                          \
    do                                        \
    {                                         \
        fprintf(stderr, "line:%d", __LINE__); \
        perror(msg);                          \
    } while (0)
#define IP "192.168.8.253"
#define PORT 6666
int main(int argc, const char *argv[])
{
    int sfd=socket(AF_INET,SOCK_DGRAM,0);
    if(sfd<0)
    {
        ERR_MSG("socket");
        return -1;
    }
    printf("socket success __%d__\n",__LINE__);
    struct sockaddr_in sin;
    sin.sin_family =AF_INET;
    sin.sin_port=htons(PORT);
    sin.sin_addr.s_addr=inet_addr(IP);

    struct sockaddr_in rcvaddr;
    socklen_t addrlen=sizeof(rcvaddr);
    char buf[128]="";
    ssize_t res =0;
    while(1)
    {
        bzero(buf, sizeof(buf));
		printf("please puts>>>");
		fgets(buf,sizeof(buf),stdin);
		buf[strlen(buf)-1]=0;
             if(sendto(sfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,sizeof(sin))<0)
        {
            perror("sento");
            return -1;
        }
		printf("send succes\n");
        bzero(buf,sizeof(buf));
        res =recvfrom(sfd,buf,sizeof(buf),0,(struct sockaddr*)&rcvaddr,&addrlen);
        if(res<0)
        {
            perror("recvfrom");
            return -1;
        }
        printf("[%s : %d] sfd=%d %s __%d__\n",inet_ntoa(rcvaddr.sin_addr),ntohs(rcvaddr.sin_port),sfd,buf,__LINE__);
   
    }
    return 0;
}

. 测试机械臂协议

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define ERR_MSG(msg)                          \
    do                                        \
    {                                         \
        fprintf(stderr, "line:%d", __LINE__); \
        perror(msg);                          \
    } while (0)
#define IP "192.168.9.1"
#define PORT 8888
struct node
{
    char buf_set;
    char buf_jixie;
    char buf_x;
    char buf_y;
    char buf_end;
};
int main(int argc, const char *argv[])
{
    struct node buf;
    buf.buf_set = 0xff;
    buf.buf_end = 0xff;
    buf.buf_jixie = 0x02;
    
    buf.buf_x = 0x00;
    char y1 = 0xff ;
    char y2 = 0xff;
    int n;

    int cfd = socket(AF_INET, SOCK_STREAM, 0);
    if (cfd < 0)
    {
        ERR_MSG("socket");
        return -1;
    }
    printf("socket success __%d__\n", __LINE__);
    int reuse = 1;
    if (setsockopt(cfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)
    {
        ERR_MSG("setsockopt");
        return -1;
    }
    printf("允许快速重用端口成功 __%d__\n", __LINE__);
    struct sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(PORT);
    sin.sin_addr.s_addr = inet_addr(IP);
    if (connect(cfd, (struct sockaddr *)&sin, sizeof(sin)) < 0)
    {
        ERR_MSG("connect");
        return -1;
    }
    printf("connect success __%d__\n", __LINE__);
    

    char con[128];
    int i = 0;
    scanf("%s", con);
    while (1)
    {

        
        switch (con[i])
        {
        case 'w':
            buf.buf_x = 0x00;
            y1++;
            buf.buf_y = y1;
            break;
        case 's':
            buf.buf_x = 0x00;
            y1--;
            buf.buf_y = y1;
            break;
        case 'a':
            buf.buf_x = 0x01;
            y2++;
            buf.buf_y = y2;
            break;
        case 'd':
            buf.buf_x = 0x01;
            y2--;
            buf.buf_y = y2;
            break;
        default:
            break;
        }
        printf("%c",con[i]);
        i++;

        if (con[i] == 0)
            break;
    }
    write(cfd, &buf.buf_set, sizeof(buf));
    write(cfd, &buf.buf_jixie, sizeof(buf));
    write(cfd, &buf.buf_x, sizeof(buf));
    write(cfd, &buf.buf_y, sizeof(buf));
    write(cfd, &buf.buf_end, sizeof(buf));
    printf("%#hhx ", buf.buf_set);
    printf("%#hhx ", buf.buf_jixie);
    printf("%#hhx ", buf.buf_x);
    printf("%#hhx ", buf.buf_y);
    printf("%#hhx\n ", buf.buf_end);



    close(cfd);

    return 0;
}