broadcast.cpp

使用于2410终端上的一个播放类似ppt文件的程序,涉及Tcp/IP通信、局域网广播、Qt视窗系统、pThread等多个方面。修改makefile中编译工具即可编译

#include <qapplication.h>
#include <qwidget.h>
#include <qpushbutton.h>
#include <qpainter.h>
#include <qpixmap.h>
#include <qpicture.h>
#include <qmessagebox.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
#include <sys/socket.h>
#include <pthread.h>
#include "mytypes.h"
#include <semaphore.h>
#include <time.h>
//related to msg list
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/msg.h>

int 	udpclient()
{
	int sock=socket(AF_INET,SOCK_DGRAM,0);
	if(sock==-1)
	{
		printf("create sock error\n");
		return -1;
	}
	struct sockaddr_in addr;
	memset(&addr,0,sizeof(struct sockaddr_in));
	addr.sin_addr.s_addr = htonl(INADDR_ANY);
	addr.sin_family=AF_INET;
	addr.sin_port=htons(7010);
	if(bind(sock,(struct sockaddr*)&addr,sizeof(struct sockaddr))==-1)
	{
		printf("bind error\n");
		return -1;
	}
	int recvlen,clientsock;
	char recvbuff[2000];
	bool recving=false;
	FILE* pfile=NULL;
	int hasrecv=0;
	int oldfiletag=-1;
	for(;;)
	{
		if((recvlen=recvfrom(sock,recvbuff,2000,0,NULL,NULL))>0)
		{
			printf("recvlen:%d\n",hasrecv+=recvlen-sizeof(BROADCASTHEAD));
			if (recvlen>0)
			{
				if(!recving||oldfiletag!=PBROADCASTHEAD(recvbuff)->ifiletag)
				{
					if(pfile)
					{
						fclose(pfile);
						hasrecv=0;
					}
					pfile=fopen("main.bmp","w+b");
					printf("cread file\n");
					char* ptemp=new char[PBROADCASTHEAD(recvbuff)->itotalsize];
					fwrite(ptemp,1,PBROADCASTHEAD(recvbuff)->itotalsize,pfile);
					recving=true;
					oldfiletag=PBROADCASTHEAD(recvbuff)->ifiletag;
				}
				printf("recv size:%d,ipos:%d\n",recvlen,PBROADCASTHEAD(recvbuff)->ipos);
				//printf("data:%s",recvbuff+sizeof(BROADCASTHEAD));
				fseek(pfile,PBROADCASTHEAD(recvbuff)->ipos*1024,SEEK_SET);
				fwrite(recvbuff+sizeof(BROADCASTHEAD),1,recvlen-sizeof(BROADCASTHEAD),pfile);
				if(hasrecv==PBROADCASTHEAD(recvbuff)->itotalsize)
				{
					printf("close file\n");
					fclose(pfile);
					pfile=NULL;
					recving=false;
					hasrecv=0;
				}
			}
		}
	}
	close(sock);
	return -1;

}
int main()
{
	udpclient();
	return 0;
}