int _BROAD (int tm, int con, char ADR [16], char MSG [16])//how many milliseconds, every X times, what address, send content; 
{
int i=0; Char * MSG. MSG=MSG; 
BOOL fBroadcast=TRUE; 
WORD wVersionRequested; 
WVersionRequested=MAKEWORD (2, 2); Int err; 
WSADATA WSADATA; 
If (=="X" (ADR) 
{
SOCKADDR_IN broad; 
Bool fb=true; 
The SOCKET Serv=SOCKET (AF_INET, SOCK_DGRAM, IPPROTO_UDP);//create the receiving set of words 
The setsockopt (Serv, SOL_SOCKET, SO_BROADCAST, (CHAR *) & amp; Fb, sizeof (BOOL)); 
Broad. Sin_family=AF_INET; 
Broad. Sin_addr. S_addr=
//broad sin_addr. S_un. S_addr=htonl (INADDR_BROADCAST); 
Broad. Sin_port=htons (5333); 
Bind (Serv, (SOCKADDR *) & amp; Broad, sizeof (broad)); 
SOCKADDR_IN Sevr; 
Sevr. Sin_family=AF_INET; 
Sevr. Sin_addr. S_addr=inet_addr (" 192.168.1.233 "); 
Char g [30]; 
While (I!=con) 
{
MessageBox (NULL, TEXT (" Xx "), TEXT (" GC "), 0). 
//sendto (bro, MSG, lstrlen (MSG), 0, (SOCKADDR *) & amp; Broad, sizeof (BOOL)); 
Sendto (Serv, MSG, err, 0, (SOCKADDR *) & amp; Broad, sizeof (broad)); 
//i++; 
//MessageBox (NULL, TEXT (" broadcast "), TEXT (" GC "), 0). 
Sleep (tm); 
} 
Closesocket (Serv); 
JSQ=false; 
} 
The _endthread (); 
return 0; 
} 
The main () 
{
_beginthread (void) (*) (void *) _BROAD (500, 5, "X", "?" ), and 0, t); 
} 

CodePudding user response:

Anecdotal hearsay, need administrator privileges,

CodePudding user response:

Check to see if the API returns the right, the second is to send a packet format is correct, is blocked by a firewall

CodePudding user response:

1. The if (ADR=="X")===="a slip of the pen or code that is written?
2. Bind (Serv, (SOCKADDR *) & amp; Broad, sizeof (broad)); Before, what did you write there? Let others help you find a BUG, it somehow code should also be neat and specification,
3. The full text, I didn't see you have to send broadcast data, even I doubt you bind all wrong, look for the example of a UDP communication code, knock, compile operation, in to this problem,