版权声明:转载请说明出处 https://blog.csdn.net/qq_33166886/article/details/85598632
可能有时候会涉及到使用串口或其他形式发送一组数据的时候,最近正好碰到,所以用这种方式简单的实现了一下,没有中间校验环节,也没有丢包重发的部分,很简单的实现,不知道会不会有什么问题出现或者不严谨的地方,另外,Linux下一切皆文件,串口的读写形式也是一样的,所以这儿用tcp测试,因为不需要用硬件测试,只需要虚拟机就能测试
client.c
#include <stdlib.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
int main(int argc, char **argv)
{
int cfd,i;
int recbyte;
int sin_size;
unsigned char buffer[10] = {0};
struct sockaddr_in s_add, c_add;
unsigned short portnum = 0x8888;
printf("Hello,welcome to client!\r\n");
if(argc != 2)
{
printf("usage: echo ip\n");
return -1;
}
cfd = socket(AF_INET, SOCK_STREAM, 0);
if(-1 == cfd)
{
printf("socket fail ! \r\n");
return -1;
}
printf("socket ok !\r\n");
bzero(&s_add,sizeof(struct sockaddr_in));
s_add.sin_family=AF_INET;
s_add.sin_addr.s_addr= inet_addr(argv[1]);
s_add.sin_port=htons(portnum);
printf("s_addr = %#x ,port : %#x\r\n",s_add.sin_addr.s_addr,s_add.sin_port);
if(-1 == connect(cfd,(struct sockaddr *)(&s_add), sizeof(struct sockaddr)))
{
printf("connect fail !\r\n");
return -1;
}
printf("connect ok !\r\n");
while(1)
{
if(-1 == (recbyte = read(cfd, &buffer[0], 1)))
{
printf("read data fail !\r\n");
return -1;
}
if(buffer[0] == 0x0a){
for(i=0;i<8;i++){
if(-1 == (recbyte = read(cfd, &buffer[i+1], 1)))
{
printf("read data fail !\r\n");
return -1;
}
printf("read ok\r\nREC:\r\n");
}
if(-1 == (recbyte = read(cfd, &buffer[9], 1)))
{
printf("read data fail !\r\n");
return -1;
}
if(buffer[9] == 0x0d)
{
printf("%d\r\n",buffer[1]);
printf("%d\r\n",buffer[2]);
printf("%d\r\n",buffer[3]);
printf("%d\r\n",buffer[4]);
printf("%d\r\n",buffer[5]);
printf("%d\r\n",buffer[6]);
printf("%d\r\n",buffer[7]);
printf("%d\r\n",buffer[8]);
}
else
memset(buffer, 0, strlen(buffer));
}
}
close(cfd);
return 0;
}
server.c
#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
int main()
{
int sfp, nfp, num = 0;
struct sockaddr_in s_add,c_add;
int sin_size;
unsigned short portnum=0x8888;
char buffer[10] = {0};
buffer[0] = 0x0a;
buffer[1] = 0x01;
buffer[2] = 0x02;
buffer[3] = 0x03;
buffer[4] = 0x04;
buffer[5] = 0x05;
buffer[6] = 0x06;
buffer[7] = 0x07;
buffer[8] = 0x08;
buffer[9] = 0x0d;
printf("Hello,welcome to my server !\r\n");
sfp = socket(AF_INET, SOCK_STREAM, 0);
if(-1 == sfp)
{
printf("socket fail ! \r\n");
return -1;
}
printf("socket ok !\r\n");
bzero(&s_add,sizeof(struct sockaddr_in));
s_add.sin_family=AF_INET;
s_add.sin_addr.s_addr=htonl(INADDR_ANY);
s_add.sin_port=htons(portnum);
if(-1 == bind(sfp,(struct sockaddr *)(&s_add), sizeof(struct sockaddr)))
{
printf("bind fail !\r\n");
return -1;
}
printf("bind ok !\r\n");
if(-1 == listen(sfp,5))
{
printf("listen fail !\r\n");
return -1;
}
printf("listen ok\r\n");
sin_size = sizeof(struct sockaddr_in);
nfp = accept(sfp, (struct sockaddr *)(&c_add), &sin_size);
if(-1 == nfp)
{
printf("accept fail !\r\n");
return -1;
}
printf("accept ok!\r\nServer start get connect from %#x : %#x\r\n",
ntohl(c_add.sin_addr.s_addr), ntohs(c_add.sin_port));
while(1)
{
send(nfp, buffer, strlen(buffer), 0);
//usleep(500000);
}
close(nfp);
close(sfp);
return 0;
}