cpp1.c

基于linux嵌入式开发板的图像采集 服务器端作为图像采集端客户从服务器接受图像

#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<string.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<sys/wait.h>
#include<sys/socket.h>

#define ServerPort 20
#define BACKLOG 1
#define MAXSIZE 1024

main()
{
	int sock_fd,new_fd;
	struct sockaddr_in my_addr;
	struct sockaddr_in their_addr;
	int sin_size;
	char buf[MAXSIZE];
	char *flag;
	int nsize=1024;
        FILE *fp;

	flag=(char *)malloc(sizeof(char));
	if((sock_fd=socket(AF_INET,SOCK_STREAM,0))==-1)
	{
		perror("socket");
		exit(1);
	}

	my_addr.sin_family=AF_INET;
	my_addr.sin_port=htons(ServerPort);
	my_addr.sin_addr.s_addr=inet_addr("192.168.2.120");
	bzero(&(my_addr.sin_zero),8);
	

	if(bind(sock_fd,(struct sockaddr*)&my_addr,sizeof(struct sockaddr))==-1)
	{
		perror("bindB");
		exit(1);
	}
	if(listen(sock_fd,BACKLOG)==-1)
	{
		perror("listen");
		exit(1);
	}
	while(1)
	{
		sin_size=sizeof(struct sockaddr_in);
		if((new_fd=accept(sock_fd,(struct sockaddr*)&their_addr,&sin_size))==-1)
		{
			perror("accept");
			continue;
		}
		printf("server:got connection from %s\n",inet_ntoa(their_addr.sin_addr));
		if(recv(new_fd,flag,1,0)==-1)
		{
			perror("receive");
			exit(1);
		}
		if(strcmp(flag,"1")!=0)
		{
			printf("no order received");
			continue;
		}
                break;
        }
	if((fp=fopen("/var/test.bmp","r"))==NULL)
	{
   	        printf("can't find the test file");
	        return 0;
	}
        while(nsize==1024)
	{
		bzero(buf,1024);
		nsize=fread(buf,1,1024,fp);
		nsize=write(new_fd,buf,nsize);
		if(nsize<=0)
		{
			printf("can't send data\n");
			return 0;
		}
	}
	fclose(fp);
	printf("succeed in transfers");
	close(new_fd);
        close(sock_fd);
	printf("send over");
}