TCP、UDP客户端

TCP客户端

#include <mystdio.h>

#define CLI_PORT 6666
#define CLI_IP "192.168.124.210"

int main(int argc, const char *argv[])//argv[1] IP argv[2] 端口号
{
   if(argc <3)
   {
       printf("请在命令传参端口号和IP地址\n");
       return -1;
   }
   //创建流式套接字文件
   int cfd = socket(AF_INET,SOCK_STREAM,0);
   if(cfd < 0)
   {
       perror("socket");
       return -1;
   }
   printf("socket seccuss cfd = %d __%d__\n",cfd,__LINE__);
   //允许端口号重复使用
   int reuse = 1;
   if(setsockopt(cfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0)
   {
       perror("setsockopt");
       return -1;
   }

   //填充客户端自身的地址信息，给bind函数绑定使用;
   struct sockaddr_in cin;
   cin.sin_family = AF_INET;
   cin.sin_port = htons(CLI_PORT);
   cin.sin_addr.s_addr = inet_addr(CLI_IP);

   //填充服务器的地址信息，给connet函数使用
   struct sockaddr_in sin;
   sin.sin_family = AF_INET;
   sin.sin_port = htons(atoi(argv[1]));
   sin.sin_addr.s_addr = inet_addr(argv[2]);

   //连接指定的服务器
   if(connect(cfd,(struct sockaddr*)&sin,sizeof(sin))<0)
   {
       perror("connect");
       return -1;
   }
   printf("connet seccuss __%d__\n",__LINE__);


   char buf[128]="";
   ssize_t res;
   while(1)
   {
       //从终端输入数据
       printf("请输入数据>>>\n");
       fgets(buf,sizeof(buf),stdin);
       buf[strlen(buf)-1] = '\0';
       //发送数据
       res = send(cfd,buf,sizeof(buf),0);
       if(res < 0)
       {
           perror("send");
           return -1;
       }

       //接收
       bzero(buf,sizeof(buf));
       res = recv(cfd,buf,sizeof(buf),0);
       if(res < 0)
       {
           perror("recv");
           return -1;
       }
       else if(0 == res)
       {
           printf("服务器下线 __%d__\n",__LINE__);
           break;
       }
       printf("%s __%d__",buf,__LINE__);


   }

close(cfd);

return 0;
}

UDP客户端

#include <mystdio.h>

#define PORT 8888
#define IP "192.168.124.210"

int main(int argc, const char *argv[])
{
   int cfd = socket(AF_INET,SOCK_DGRAM,0);
   if(cfd < 0)
   {
       fprintf(stderr,"line:%d",__LINE__);
       perror("sockaddr");
       return -1;
   }
   printf("创建报式套接字成功 cfd=%d __%d__\n",cfd,__LINE__);
   //允许端口被重复使用
   int reuse = 1;
   if(setsockopt(cfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0)
   {
       fprintf(stderr,"line:%d",__LINE__);
       perror("setsockopt");
       return -1;
   }
   //填充服务器的地址信息
   struct sockaddr_in sin;
   sin.sin_family        = AF_INET;
   sin.sin_port        = htons(PORT);
   sin.sin_addr.s_addr = inet_addr(IP);

   char buf[128] = "";
   struct sockaddr_in rcv;
   socklen_t addrlen = sizeof(rcv);
   while(1)
   {
       bzero(buf,sizeof(buf));
       printf("请输入信息>>>\n");
       fgets(buf,sizeof(buf),stdin);
       buf[strlen(buf)-1] = '\0';
       if(sendto(cfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,sizeof(sin))<0)
       {
           fprintf(stderr,"line:%d",__LINE__);
           perror("sendto");
           return -1;
       }
       if(strcmp(buf,"quit") == 0)
       {
           break;
       }
       printf("发送成功\n");

       bzero(buf,sizeof(buf));
       if(recvfrom(cfd,buf,sizeof(buf),0,(struct sockaddr*)&rcv,&addrlen)<0)
       {
           fprintf(stderr,"line:%d",__LINE__);
           perror("recvfrom");
           return -1;
       }
       if(strcmp(buf,"quit") == 0)
       {
           break;
       }
       printf("[%s:%d] %s __%d__\n",\
               inet_ntoa(rcv.sin_addr),ntohs(rcv.sin_port),buf,__LINE__);
       }

close(cfd);
return 0;
}

机械臂

#include <mystdio.h>

#define CLI_PORT 6666
#define CLI_IP "192.168.124.210"

   //填充服务器的地址信息，给connet函数使用
   struct sockaddr_in sin;
   sin.sin_family = AF_INET;
   sin.sin_port = htons(atoi(argv[1]));
   sin.sin_addr.s_addr = inet_addr(argv[2]);

   //连接指定的服务器
   if(connect(cfd,(struct sockaddr*)&sin,sizeof(sin))<0)
   {
       perror("connect");
       return -1;
   }
   printf("connet seccuss __%d__\n",__LINE__);

   int fd = open("/dev/input/event1",O_RDONLY);
   if(fd<0)
   {
       perror("open");
       return -1;
   }

   struct input_event ev;

   char buf[5]={0xff,0x02,0x00,30,0xff};
   unsigned char str[5] = {0xff,0x02,0x01,20,0xff};
   if(send(cfd,buf,sizeof(buf),0)< 0)
   {
       perror("send");
       return -1;
   }
   if(send(cfd,str,sizeof(str),0)< 0)
   {
       perror("send");
       return -1;
   }

   while(1)
   {
       if(read(fd,&ev,sizeof(ev))<0)
       {
           perror("read");
           return -1;
       }

       switch(ev.code*ev.value)
       {
       case 17:
           buf[3] += 5;
           if(buf[3]>90)
               buf[3] = 90;
           break;
       case 31:
           buf[3] -= 5;
           if(buf[3] < -90)
               buf[3] = -90;
           break;
       case 30:
           str[3] -= 5;
           if(str[3] < 0)
               str[3] = 0;
           break;
       case 32:
           str[3] += 5;
           if(str[3] >180 )
               str[3] = 180;
           break;
       default:
           continue;
       }

       if(send(cfd,buf,sizeof(buf),0)<0)
       {
           perror("send");
           return -1;
       }
       if(send(cfd,str,sizeof(str),0)<0)
       {
           perror("send");
           return -1;
       }