int dg_echo(int sockfd, SA *pcliaddr, socklen_t clilen)
{
int ret;
#ifndef EMULATE
#ifdef FTDI
if ((ret = dmx_init(&ftdic)) == EXIT_SUCCESS)
#endif // FTDI
#ifdef SC12
if ((ret = dmx_init(port, 250000L, FOSSIL_PARITY_NO, 8, 2)) == EXIT_SUCCESS)
// if ((ret = dmx_init(port, 19200L, FOSSIL_PARITY_NO, 8, 1)) == EXIT_SUCCESS)
#endif // SC12
#endif // EMULATE
{
int n, m;
int channel;
int nchars;
socklen_t len;
unsigned char mesg[MAXLINE];
int i;
#ifdef SC12
int error;
#endif
bzero(dmx, sizeof(dmx));
#ifndef EMULATE
#ifndef SC12
set_timer();
#endif
#endif
for ( ; ; ) {
#ifdef SC12
n = recvfrom(sockfd, mesg, MAXLINE, MSG_BLOCKING, 0L, pcliaddr, &error);
if (n >= 20) // minimum required ArtDMX size
{
#else
len = clilen;
n = recvfrom(sockfd, mesg, MAXLINE, 0, pcliaddr, &len);
#endif
if (strcmp(mesg, "Art-Net") == 0)
{
int opcode = mesg[8] | mesg[9] << 8;
if (opcode == 0x5000) // OpDmx
{
int length = mesg[16] << 8 | (mesg[17] & 0xFE); // force even
if (length <= 512)
{
bcopy(mesg + 18, dmx + 1, length);
dmx_write(port, dmx, length + 1);
fossil_flush_output(port);
}
}
}
#ifdef SC12
}
#endif
}
}
return ret;
}
static int universe_set(struct dmx_t dmx, size_t size)
{
int ret = EXIT_FAILURE;
if ((do_dmx_break(&ftdic) == EXIT_SUCCESS) && (dmx_write(&ftdic, dmx, size) == EXIT_SUCCESS))
{
ret = EXIT_SUCCESS;
}
return ret;
}
void alarm_wakeup(int i)
{
dmx_write(&ftdic, dmx, sizeof(dmx));
}