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Redo fix for incorrect vlan parsing of rx emuldev frames

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The previous fix in 6977278654 was incorrect and incomplete since it
won't handle the case when emulated devices have PRIO and/or CFI/DEI
set.

This is the correct fix where Prio and CFI/DEI are no longer part of the
device key.
This commit is contained in:
Srivats P 2020-01-26 19:01:37 +05:30
parent f0dd0c307b
commit 176fc7dd15
2 changed files with 8 additions and 5 deletions
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5
server/device.cpp
View File

@ -33,7 +33,8 @@ const int kIp6HdrLen = 40;
/*
* NOTE:
* 1. Device Key is (VLANS + MAC) - is assumed to be unique for a device
* 1. Device Key is (VLANS [without prio/cfi] + MAC)
* - is assumed to be unique for a device
* 2. Device clients/users (viz. DeviceManager) should take care when
* setting params that change the key, if the key is used elsewhere
* (e.g. in a hash)
@ -67,7 +68,7 @@ void Device::setVlan(int index, quint16 vlan, quint16 tpid)
vlan_[index] = (tpid << 16) | vlan;
ofs = index * sizeof(quint16);
key_[ofs] = vlan >> 8;
key_[ofs] = (vlan >> 8) & 0x0f; // Vlan prio/cfi should not be part of key
key_[ofs+1] = vlan & 0xff;
if (index >= numVlanTags_)

8
server/devicemanager.cpp
View File

@ -265,10 +265,11 @@ _eth_type:
if (tpidList_.contains(ethType)) {
offset += 2;
vlan = qFromBigEndian<quint16>(pktData + offset) & 0x0FFF;
vlan = qFromBigEndian<quint16>(pktData + offset);
dk.setVlan(idx++, vlan);
offset += 2;
qDebug("%s: idx: %d vlan %d", __FUNCTION__, idx, vlan);
qDebug("%s: idx: %d vlan: 0x%04x/%d", __FUNCTION__,
idx, vlan, vlan & 0x0fff);
goto _eth_type;
}
@ -383,7 +384,8 @@ _eth_type:
vlan = qFromBigEndian<quint16>(pktData + offset);
dk.setVlan(idx++, vlan);
offset += 2;
qDebug("%s: idx: %d vlan %d", __FUNCTION__, idx, vlan);
qDebug("%s: idx: %d vlan: 0x%04x/%d", __FUNCTION__,
idx, vlan, vlan & 0x0fff);
goto _eth_type;
}