//TODO: move this into an "ideal-mac" directory, and use the
// same interfaces we use for sift/smac/etc. to channel
// data over devnet_xmit, using the idealized MAC layer
int
mac_xmit(uchar *ear_dst_addr, uchar *ear_hdr, int hdrlen, uchar *data, int datalen)
{
//fprintf(stderr, "mac_xmit(), ear_dst_addr=[%s]\n", ear_dst_addr);
return devnet_xmit(ear_dst_addr, PROTO_EAR, ear_hdr, hdrlen, 0);
}
void
dam_broadcast(Dampkt *p)
{
uchar data[4 + 2*(DAM_ID_LEN+1) + 2*8];
memmove(&data[0], &(p->timestamp), 4);
memmove(&data[4], p->transID, DAM_ID_LEN+1);
memmove(&data[4 + DAM_ID_LEN+1], p->maxID, DAM_ID_LEN+1);
memmove(&data[4 + 2*(DAM_ID_LEN+1)], &(p->maxPr), 8);
memmove(&data[4 + 2*(DAM_ID_LEN+1) + 8], &(p->transPr), 8);
NETTRACEMARK(4);
LOGMARK(8);
devnet_xmit("::1", PROTO_DAM_INTERNAL, data, 4 + 2*(DAM_ID_LEN+1) + 2*8, 0);
LOGMARK(9);
NETTRACEMARK(5);
return;
}
void
startup(void)
{
/* Monitor code is @ 0x8001000 */
void (*fptr)() = (void *)0x8001000;
int frames_rcvd = 0, addrchars, i;
uchar demod_dst[16+1];
LPFData lpf_data;
/* If we are the clone of someone, my_id is already set, keep it, for timeslot stuff */
if (my_id == -1)
{
addrchars = strlen((char *)NIC_OUI);
my_id = 0;
for (i = addrchars-1; i >= 0; i--)
{
my_id += (*(NIC_OUI+i) - '0') * pow10(addrchars - 1 - i);
}
}
sprint(&demod_dst[0], "%d", my_id+1);
hdlr_install();
/* Power up both RX interfaces */
devnet_ctl(NIC_NCR_WRITE, NIC_CMD_POWERUP, 0);
devnet_ctl(NIC_NCR_WRITE, NIC_CMD_POWERUP, 1);
print("swradio-lpf [%d] installing vector code...\n", my_id);
/* Make sure we're talking on regular segment */
/* uncommenmt if doing segmented network */
sample_flag = 0;
syn_sent = 0;
fb1.rpos = fb1.rlen = 0;
fb2.rpos = fb2.rlen = 0;
init_lpf_data(&lpf_data, CUTOFF_FREQUENCY, NUM_TAPS, DECIMATION);
/* LPF needs at least NUM_TAPS+1 inputs; get_floats is fine. */
while (!sample_flag)
{
sleep();
}
run_lpf((void *)&fb1, (void *)&fb2, &lpf_data);
sample_flag = 0;
/* */
/* run_demod needs 1 input, OK here. run_equalizer needs 51 */
/* inputs (same reason as for LPF). This means running the */
/* pipeline up to demod 50 times in advance: */
/* */
while (frames_rcvd < NUM_TAPS)
{
while (!sample_flag)
{
sleep();
}
frames_rcvd++;
sample_flag = 0;
run_lpf((void *)&fb1, (void *)&fb2, &lpf_data);
/*
print("swradio-lpf (node [%d]) sending [%d] bytes to DEMOD (node [%s])\n",
my_id, sizeof(fb1), demod_dst);
print("fb2.rpos = [%d], fb2.rlen = [%d]\n", fb2.rpos, fb2.rlen);
*/
devnet_xmit((uchar *)&demod_dst, 0, (uchar *)&fb2, sizeof(fb2), 1);
/* */
/* Since we are doing Call-By-Value, we must make this change */
/* here. The corresponding calculation in run_demod is a No-op */
/* */
fb2.rpos++;
}
/* Wait till intr_hdlr is done */
done_flag = 0;
while (!done_flag)
{
if (sample_flag)
{
run_lpf((void *)&fb1, (void *)&fb2, &lpf_data);
/*
print("swradio-lpf (node [%d]) sending [%d] bytes to DEMOD (node [%s])\n",
my_id, sizeof(fb1), demod_dst);
print("fb2.rpos = [%d], fb2.rlen = [%d]\n", fb2.rpos, fb2.rlen);
*/
/* Now send fb2 to be Demod'd. We dont re-xmit */
devnet_xmit((uchar *)&demod_dst, 0, (uchar *)&fb2, sizeof(fb2), 1);
/* */
/* Since we are doing Call-By-Value, we must make this change */
/* here. The corresponding calculation in run_demod is a No-op */
/* */
fb2.rpos++;
sample_flag = 0;
}
sleep();
}
/* Forcefully go to monitor */
fptr();
return;
}
int devnet_xmit(uchar *dst, uchar proto, uchar *data, int nbytes, int whichifc)
{
int framesize;
int n = 0, i;
uchar *tptr;
ulong ifc_shift_offset = (whichifc & 0xFFF) << 4;
ulong savedSR;
//@@printf("in devnet_xmit, sending [%d] bytes to [%s], proto [%d], via ifc [%d]\n", nbytes, dst, proto, whichifc);
/* Save SR, then disable intrs: */
savedSR = getpsr();
splhi();
/* Save the dst for future use */
for (i = 0; i < 16; i++)
{
*(NIC_DST + ifc_shift_offset + i) = *(dst + i);
}
/* Write 16 byte src_addr */
for (i = 0; i < 16; i++)
{
*(NIC_TDR + ifc_shift_offset) = *(NIC_OUI + i);
}
n += 16;
/* Write 16 byte dst_addr */
for (i = 0; i < 16; i++)
{
*(NIC_TDR + ifc_shift_offset) = *(dst + i);
//printf("devnet_xmit(), *(dst+i) = [%d]\n", *(dst+i));
}
n += 16;
/* Write 4 byte payloadlen */
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 24) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 16) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 8) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 0) & 0xFF;
n += 4;
/* Write 1 byte nexthdr */
*(NIC_TDR + ifc_shift_offset) = proto;
n += 1;
/* */
/* The 32 bit cksum added by hw */
/* is not counted as part of fsz */
/* */
framesize = devnet_getmaxfsz(whichifc);
/* Write data */
tptr = data;
for (i = 0; (i < nbytes) && (n < framesize); i++)
{
*(NIC_TDR + ifc_shift_offset) = *tptr++;
n++;
}
/* if nbytes+header size was more than a frame, recurse */
if (nbytes + 16 + 16 + 4 + 1 > framesize)
{
printf(
"Warning!!! devnet_xmit recursing: nbytes+header = %d, framesize = %d\n",
nbytes + 16 + 16 + 4 + 1, framesize);
devnet_xmit(dst, proto, tptr, nbytes - i, whichifc);
} else
while (n < framesize)
{
/* Send padding */
*(NIC_TDR + ifc_shift_offset) = 0;
n++;
}
/* Restore SR */
spldone(savedSR);
/* */
/* If frame could'nt be sent, LSB */
/* of NIC_NSR will be 1, return -1 */
/* */
return -((*(NIC_NSR + ifc_shift_offset)) & 0x1);
}
