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Device Emulation (contd.): Lookup NDP Cache for IPv6 neighbor mac

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This commit is contained in:
Srivats P 2016-01-13 21:15:47 +05:30
parent 21197146e2
commit 07dd945f50
2 changed files with 39 additions and 8 deletions
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21
server/device.cpp
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@ -382,11 +382,30 @@ quint64 Device::neighborMac(const PacketBuffer *pktBuf)
dstIp = qFromBigEndian<quint32>(pktData + ipHdrLen - 4);
mask = ~0 << (32 - ip4PrefixLength_);
qDebug("dst %x self %x mask %x", dstIp, ip4_, mask);
qDebug("dst %x mask %x self %x", dstIp, mask, ip4_);
tgtIp = ((dstIp & mask) == (ip4_ & mask)) ? dstIp : ip4Gateway_;
return arpTable_.value(tgtIp);
}
else if ((ethType == kEthTypeIp6) && hasIp6_) { // IPv6
UInt128 dstIp, tgtIp, mask;
if (pktBuf->length() < (kIp6HdrLen+2)) {
qDebug("incomplete IPv6 header: expected %d, actual %d",
kIp6HdrLen, pktBuf->length()-2);
return false;
}
dstIp = qFromBigEndian<UInt128>(pktData + 24);
mask = ~UInt128(0, 0) << (128 - ip6PrefixLength_);
qDebug("dst %s mask %s self %s",
qPrintable(QHostAddress(dstIp.toArray()).toString()),
qPrintable(QHostAddress(mask.toArray()).toString()),
qPrintable(QHostAddress(ip6_.toArray()).toString()));
tgtIp = ((dstIp & mask) == (ip6_ & mask)) ? dstIp : ip6Gateway_;
return ndpTable_.value(tgtIp);
}
return false;
}

12
test/emultest.py
View File

@ -447,6 +447,7 @@ def test_multiEmulDevNoVlan(drone, ports, dut, dut_ports, dut_ip,
s = stream_cfg.stream.add()
s.stream_id.id = stream_id.stream_id[i].id
s.core.is_enabled = True
s.core.frame_len = 80 # FIXME: change to 128
s.control.packets_per_sec = 100
s.control.num_packets = 10
@ -703,6 +704,7 @@ def test_multiEmulDevNoVlan(drone, ports, dut, dut_ports, dut_ip,
print(cap_pkts)
log.info('dumping Rx capture buffer (filtered)')
for i in range(num_devs):
if has_ip4:
cap_pkts = subprocess.check_output([tshark, '-nr', 'capture.pcap',
'-Y', '(ip.src == 10.10.1.' + str(101+i*ip_step) + ') '
' && (ip.dst == 10.10.2.' + str(101+i*ip_step) + ')'
@ -710,6 +712,16 @@ def test_multiEmulDevNoVlan(drone, ports, dut, dut_ports, dut_ip,
+ format(1+i*mac_step, '02x')+')'])
print(cap_pkts)
assert cap_pkts.count('\n') == s.control.num_packets/num_devs
if has_ip6:
cap_pkts = subprocess.check_output([tshark, '-nr', 'capture.pcap',
'-Y', '(ipv6.src == 1234:1::'
+ format(101+i*ip_step, 'x') + ') '
' && (ipv6.dst == 1234:2::'
+ format(101+i*ip_step, 'x') + ')'
' && (eth.dst == 00:01:02:03:0b:'
+ format(1+i*mac_step, '02x')+')'])
print(cap_pkts)
assert cap_pkts.count('\n') == s.control.num_packets/num_devs
os.remove('capture.pcap')
drone.stopTransmit(ports.tx)