void
packetio_send_discover(uint16_t thisSeqNum, bool_t sendAck)
{
size_t nbytes;
topo_discover_header_t* dhdr;
// buf, src-addr, dst-addr, service-type, g_opcode, seq, B'cast
dhdr = fmt_base(g_txbuf, &g_hwaddr, &Etheraddr_broadcast, ToS_TopologyDiscovery, Opcode_Discover, thisSeqNum, TRUE);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t);
dhdr->mh_gen = 0;
if (sendAck)
{
dhdr->mh_numstations = htons(1);
memcpy((void*)(dhdr+1),&uutMAC,sizeof(etheraddr_t));
nbytes += sizeof(etheraddr_t);
} else {
dhdr->mh_numstations = 0;
}
nbytes += sizeof(topo_discover_header_t);
tx_sendpacket(nbytes, thisSeqNum);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_discover: seqnum = %d\n", thisSeqNum);
END_TRACE
}
void
packetio_send_emit(uint16_t thisSeqNum, etheraddr_t* pDst, uint16_t emiteeCnt)
{
size_t nbytes;
topo_emit_header_t *emithdr;
topo_emitee_desc_t *pEmitee;
topo_emitee_desc_t emitee;
etheraddr_t OUI_hwaddr = {{0x00,0x0d,0x3a,0xd7,0xf1,0x50}};
uint count = emiteeCnt;
IF_TRACED(TRC_PACKET)
dbgprintf("tx_emit: seqnum = %d, dst= " ETHERADDR_FMT ", numEmitees=%d\n",
thisSeqNum, ETHERADDR_PRINT(pDst), count);
END_TRACE
// buf, src-addr, dst, service-type, g_opcode, seq, B'cast
emithdr = (topo_emit_header_t*)fmt_base(g_txbuf,&g_hwaddr,pDst,ToS_TopologyDiscovery,Opcode_Emit,thisSeqNum,FALSE);
emithdr->eh_numdescs = htons(emiteeCnt);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t) + sizeof(topo_emit_header_t);
pEmitee = (topo_emitee_desc_t*)(emithdr+1);
emitee.ed_type = 0;
emitee.ed_pause = 3;
memcpy(&emitee.ed_src,&OUI_hwaddr,sizeof(etheraddr_t));
memcpy(&emitee.ed_dst,&OUI_hwaddr,sizeof(etheraddr_t));
for (; emiteeCnt>0; emiteeCnt--)
{
memcpy(pEmitee,&emitee,sizeof(topo_emitee_desc_t));
pEmitee++;
nbytes += sizeof(topo_emitee_desc_t);
}
tx_sendpacket(nbytes, thisSeqNum);
}
void
packetio_tx_qltlvResp(uint16_t thisSeqNum, tlv_desc_t *tlvDescr, size_t LtlvOffset)
{
size_t nbytes, sz_ltlv;
if (g_topo_session == NULL)
{
warn("packetio_tx_qltlvResp: no mapping session when qLTLV was received. No response is being sent.\n");
return;
}
fmt_base(g_txbuf, &g_hwaddr, &g_topo_session->ssn_mapper_real, ToS_TopologyDiscovery,
Opcode_QueryLargeTlvResp, thisSeqNum, FALSE);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t);
/* write the TLV, starting at the indicated offset */
sz_ltlv = tlv_write_tlv( tlvDescr, &g_txbuf[nbytes], TOPO_MAX_FRAMESZ - nbytes, FALSE, LtlvOffset);
if (sz_ltlv == 0)
{ /* there was an error - the TLV could not be written for some reason */
g_txbuf[nbytes++] = 0; /* zero the two bytes of LTLV length and flag, */
g_txbuf[nbytes++] = 0; /* which will be the only things sent. */
}
nbytes += sz_ltlv;
tx_sendpacket(nbytes, thisSeqNum);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_ack: %d -> " ETHERADDR_FMT "\n",
thisSeqNum, ETHERADDR_PRINT(&g_topo_session->ssn_mapper_real));
END_TRACE
}
void
packetio_tx_flat(void)
{
topo_flat_header_t *fh;
size_t nbytes;
fh = fmt_base(g_txbuf, &g_hwaddr, &g_topo_session->ssn_mapper_real, ToS_TopologyDiscovery, Opcode_Flat,
g_sequencenum, FALSE /*g_topo_session->ssn_use_broadcast*/);
fh->fh_ctc_bytes = htonl(g_ctc_bytes);
fh->fh_ctc_packets = htons((uint16_t)g_ctc_packets);
/*(doesn't work! padded to 8!) sizeof(topo_flat_header_t)*/;
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t) + sizeof(uint32_t) + sizeof(uint16_t);
tx_sendpacket(nbytes, g_sequencenum);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_flat(len:" FMT_SIZET "+" FMT_SIZET "+" FMT_SIZET "): " FMT_UINT32 " bytes, " FMT_UINT32 \
" packets -> " ETHERADDR_FMT "\n",
sizeof(topo_ether_header_t),sizeof(topo_base_header_t),sizeof(topo_flat_header_t),
g_ctc_bytes, g_ctc_packets,
ETHERADDR_PRINT(&g_topo_session->ssn_mapper_real));
END_TRACE
}
void
packetio_tx_hello(void)
{
topo_hello_header_t *tx_hh;
size_t nbytes;
tx_hh = fmt_base(g_txbuf, &g_hwaddr, &Etheraddr_broadcast, ToS_TopologyDiscovery, Opcode_Hello, 0, TRUE);
tx_hh->hh_gen = htons(g_generation);
if (g_topo_session != NULL && g_topo_session->ssn_is_valid)
{
tx_hh->hh_curmapraddr = g_topo_session->ssn_mapper_real;
tx_hh->hh_aprmapraddr = g_topo_session->ssn_mapper_current;
} else {
memset(&tx_hh->hh_curmapraddr, 0, sizeof(etheraddr_t));
memset(&tx_hh->hh_aprmapraddr, 0, sizeof(etheraddr_t));
}
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t) + sizeof(topo_hello_header_t);
/* write the TLVs (reserving room for the EOP byte) */
nbytes += tlv_write_info(&g_txbuf[nbytes], TOPO_MAX_FRAMESZ - nbytes - 1);
/* now add the EOP */
g_txbuf[nbytes] = 0;
nbytes++;
tx_sendpacket(nbytes, 0);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_hello (%s): topo-ssn=%p gen=%d\n",
(g_topo_session && g_topo_session->ssn_is_valid)?"topo":"quick",
g_topo_session, ntohs(tx_hh->hh_gen));
END_TRACE
}
void
packetio_send_reset(etheraddr_t* pDst)
{
size_t nbytes;
// buf, src-addr, dst-addr, service-type, g_opcode, seq, B'cast
fmt_base(g_txbuf, &g_hwaddr, pDst, ToS_TopologyDiscovery, Opcode_Reset, 0, FALSE);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t);
tx_sendpacket(nbytes, 0);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_reset: dst= " ETHERADDR_FMT "\n", ETHERADDR_PRINT(pDst));
END_TRACE
}
void
packetio_send_charge(uint16_t thisSeqNum, etheraddr_t* pDst)
{
size_t nbytes;
// buf, src-addr, dst-addr, service-type, g_opcode, seq, B'cast
fmt_base(g_txbuf, &g_hwaddr, pDst, ToS_TopologyDiscovery, Opcode_Charge, thisSeqNum, FALSE);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t);
tx_sendpacket(nbytes, thisSeqNum);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_charge: seqnum = %d, dst= " ETHERADDR_FMT "\n",
thisSeqNum, ETHERADDR_PRINT(pDst));
END_TRACE
}
void
packetio_tx_ack(uint16_t thisSeqNum)
{
size_t nbytes;
fmt_base(g_txbuf, &g_hwaddr, &g_topo_session->ssn_mapper_real, ToS_TopologyDiscovery,
Opcode_ACK, thisSeqNum, FALSE /*g_topo_session->ssn_use_broadcast*/);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t);
tx_sendpacket(nbytes, thisSeqNum);
IF_TRACED(TRC_PACKET)
dbgprintf("tx_ack: %d -> " ETHERADDR_FMT "\n",
thisSeqNum, ETHERADDR_PRINT(&g_topo_session->ssn_mapper_real));
END_TRACE
}
void
packetio_tx_queryresp(void)
{
topo_queryresp_header_t *qr;
topo_recvee_desc_t *p;
size_t nbytes, bytes_left;
qr = fmt_base(g_txbuf, &g_hwaddr, &g_topo_session->ssn_mapper_real, ToS_TopologyDiscovery, Opcode_QueryResp,
g_sequencenum, FALSE /*g_topo_session->ssn_use_broadcast*/);
nbytes = sizeof(topo_ether_header_t) + sizeof(topo_base_header_t) +
sizeof(topo_queryresp_header_t);
bytes_left = TOPO_MAX_FRAMESZ - nbytes;
qr->qr_numdescs = 0;
p = (topo_recvee_desc_t*)(qr + 1);
while ((bytes_left >= sizeof(topo_recvee_desc_t)) &&
seeslist_dequeue(p))
{
p++;
bytes_left -= sizeof(topo_recvee_desc_t);
nbytes += sizeof(topo_recvee_desc_t);
qr->qr_numdescs++;
}
/* any more to follow? */
if (!seeslist_is_empty())
qr->qr_numdescs |= 0x8000; /* set the M (more) bit */
qr->qr_numdescs = htons(qr->qr_numdescs);
tx_sendpacket(nbytes, g_sequencenum);
#ifdef __DEBUG__
IF_TRACED(TRC_PACKET)
dbgprintf("tx_queryresp: -> " ETHERADDR_FMT "\n", ETHERADDR_PRINT(&g_topo_session->ssn_mapper_real));
END_TRACE
#endif
}