Is there anybody know how the Angilent I/O instrument work?I want wo build a LXI instrument on DM642

the  Angilent  I/O  interface :

if  I  click  "add  an  instrument"  ,    open  this  :

at  this  time, it  will  send   broadcast  message,DM642  will  receive.

this  is  my  code  on  DM642:

void  receive_broad()

{

 int broadsock;
 struct sockaddr_in broadClient,broadaddr;
 int len = sizeof(struct sockaddr_in);
 struct fd_set FuSet;
 char buf[100];
 char * ip;

 int retn=0;
 int so_broadcast=1;

 struct timeval timeout={10,0};
 
  fdOpenSession(TaskSelf());
     
 bzero( &broadaddr, sizeof(struct sockaddr_in) );

 broadaddr.sin_family = AF_INET;
 broadaddr.sin_addr.s_addr=INADDR_ANY;
 broadaddr.sin_port = htons(BROAD_PORT);                 
 broadaddr.sin_len  = sizeof(broadaddr); 
 
 
   
 broadsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);  
 if(broadsock<0)
  printf("the broad socket is failure!\n");

 retn=bind(broadsock,&broadaddr,len);
 if(retn<0)
  printf("the broad socket bind is fail!\n");
 
 while(1)
 { 
  recvfrom(broadsock,(void *)buf,100,MSG_WAITALL,(PSA)&broadClient,&len);
  NtIPN2Str((broadClient.sin_addr.s_addr),ip);//turn to char
  printf("the from addr is %s\n",ip);
  printf("the msg is %s\n",buf);
 }
 
             
    fdCloseSession(TaskSelf());
    TaskBlock(TaskSelf());

}

and  now,  DSP  can  receive  message  from  Angilent  I/O  instrumen's  message  on  192.168.1.11:

but  the  angilent  IO instrument  has  no  change .

who  can  help  me ?