ChamSys MagicQ - Page 271

ChamSys Ltd www.chamsys.co.uk
MagicQ User Manual 271 Version 1.4.9.0
getsockopt (remote_ether_sock,SOL_SOCKET,SO_REUSEADDR, opts, &optlen);
opts[0] = 1;
setsockopt (remote_ether_sock,SOL_SOCKET,SO_REUSEADDR, opts, optlen);
/* Give the socket a name. */
name.sin_family = AF_INET;
name.sin_port = htons (REMOTE_ETHER_PORT);
name.sin_addr.s_addr = htonl (INADDR_ANY);
if (bind (remote_ether_sock, (struct sockaddr *) &name, sizeof (name)) < 0)
{
closesocket(remote_ether_sock);
return (FALSE);
}
getsockopt (remote_ether_sock,SOL_SOCKET,SO_BROADCAST, opts, &optlen);
opts[0] = 1;
setsockopt (remote_ether_sock,SOL_SOCKET,SO_BROADCAST, opts, optlen);
{
u_long block;
block = 1;
ioctlsocket(remote_ether_sock,FIONBIO,&block);
}
return TRUE;
}
int remote_ether_rx(char *data, word16 size)
{
char message[MAX_CREP_MSG];
int nbytes;
remote_ether_message_t *rem = (remote_ether_message_t *) message;
struct sockaddr_in name;
int name_len = sizeof(name);
if (!remote_ether_sock) return (0);
nbytes = recvfrom (remote_ether_sock, message, MAX_CREP_MSG, 0, (struct
sockaddr *) &name, &name_len);
if (nbytes > 0)
{
if (rem->chamsys == (('C'<<24)|('R'<<16)|('E'<<8)|('P')))
{
int len = wswap(rem->length);
remote_ether_bkwd = rem->seq_fwd;
if (len<(MAX_CREP_MSG-(sizeof(remote_ether_message_t)+1)))
{
if (len>size) len = size;
memcpy(data,&(rem->data),len);
return (len);
}
}
}
return (0);
}
char remote_ether_tx(char *data, word16 size)
{
// Format the message