Bluez下的rfcomm层通信测试程序

在去年完成了Bluez在X86平台下安装后,为了测试安装十分成功,根据一些资料编写了一个简单的蓝牙server—client传递字符串的程 序,有server 端启动后发送一个简单的字符串"hello"给client端,client端如果能够接收到就打印在屏幕上.本来那个时候想将server 端交叉编译后移植到ARM平台的,后来还是没有这样做,就直接在X86平台上进行了通信实验,很简单的就通过了,现在写好了利用两个Bluetooth设 备进行文件传输的程序,在X86平台上已经编译和传输文件通过,但是还是存在一些小的问题,这段时间又在公司来实习培训了,都没有去弄了.下周开始要开始 弄自己的这些程序了,希望能够很快的解决掉自己的毕业设计好全力弄公司的工作.还有朋友ifq说在传输很大的字符串(超过1000)时会出现问题,我还没 有去寻找解决的办法.实际上Bluetooth 的通信其实和普通socket编程中建立tcp连接很相似.下面是测试程序的代码:

客户端代码:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
int main( int argc , char **argv)
{
       struct sockaddr_rc addr={0};
       int s,status;
       char *dest,*buf; //="00:11:67:32:61:62";
   
       void baswap(bdaddr_t *dst, const bdaddr_t *src)
         {
register unsigned char *d = (unsigned char *) dst;
register const unsigned char *s = (const unsigned char *) src;
register int i;
for (i = 0; i < 6; i++)
      d[i] = s[5-i];
         }

       int str2ba(const char *str, bdaddr_t *ba)
         {
uint8_t b[6];
const char *ptr = str;
int i;

for (i = 0; i < 6; i++) {
      b[i] = (uint8_t) strtol(ptr, NULL, 16);
      if (i != 5 && !(ptr = strchr(ptr, ':')))
       ptr = ":00:00:00:00:00";
      ptr++;
}
baswap(ba, (bdaddr_t *) b);
return 0;
         }

       if(argc==2)
         {
           dest=argv[1];
         }
       else
         {
           printf("prarm error/n");
           exit(1);
         }
   
       // allocatea socket
       s=socket(AF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM);
       if(s<0)
         {
           perror("create socket error");
           exit(1);
         }
   
       // set the connection parameters (who to connect to )
       addr.rc_family=AF_BLUETOOTH;
       addr.rc_channel=(uint8_t)1;
       str2ba(dest,&addr.rc_bdaddr);
   
       // connect to server
       printf("connectting.../n");
       status=connect(s,(struct sockaddr *)&addr,sizeof(addr));
   
       // send a message
       if(status==0){
         printf("scuess!/n");
         status=write(s,"hello!",6);

       close(s);
       return 0;
}

服务器端代码:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
int main (int argc,char **argv)
{
     struct sockaddr_rc loc_addr ={0},rem_addr={0};
     char buf[1024] ={0},*addr;
     int s,client, bytes_read,result;
     int opt = sizeof(rem_addr);
  
     printf("Creating socket.../n");
     s=socket(AF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM);
     if(s<0)
       {
         perror("create socket error");
         exit(1);
       }
     else
       {
         printf("success!/n");
       }

     loc_addr.rc_family=AF_BLUETOOTH;
     loc_addr.rc_bdaddr=*BDADDR_ANY;
     loc_addr.rc_channel=(uint8_t)1;
  
     printf("Binding socket.../n");
     result=bind(s,(struct sockaddr *)&loc_addr, sizeof(loc_addr));
     if(result<0)
       {
         perror("bind socket error:");
         exit(1);
       }
     else
       {
         printf("success!/n");
       }
   
     void baswap(bdaddr_t *dst, const bdaddr_t *src)
       {
register unsigned char *d = (unsigned char *) dst;
register const unsigned char *s = (const unsigned char *) src;
register int i;
for (i = 0; i < 6; i++)
    d[i] = s[5-i];
       }

     int ba2str(const bdaddr_t *ba, char *str)
       {
uint8_t b[6];

baswap((bdaddr_t *) b, ba);
return sprintf(str, "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
    b[0], b[1], b[2], b[3], b[4], b[5]);
       }

     /*result=ba2str(&loc_addr.rc_bdaddr,addr);
     if(result<0)
       {
         perror("addr convert error");
         exit(1);
       }
       printf("local addr is:%s/n",addr);*/
     printf("Listen... ");
     result=listen(s,1);
     if(result<0)
       {
         printf("error:%d/n:",result);
         perror("listen error:");
         exit(1);
       }
     else
       {
         printf("requested!/n");
       }

     printf("Accepting.../n");
     client= accept(s,(struct sockaddr *)&rem_addr,&opt);
     if(client<0)
       {
         perror("accept error");
         exit(1);
       }
     else
       {
         printf("OK!/n");
       }
     ba2str(&rem_addr.rc_bdaddr,buf);
     fprintf(stderr,"accepted connection from %s /n",buf);
     memset(buf,0,sizeof(buf));

     while(1)
       {
         bytes_read = read(client,buf,sizeof(buf));
         if(bytes_read>0){
       printf("received[%s]/n",buf);
         exit(1);
         }
       }

     close(client);
     close(s);
     return 0 ;
}