string VlanLayer::toString()
{
ostringstream cfiStream;
cfiStream << ntohs(getVlanHeader()->cfi);
ostringstream priStream;
priStream << ntohs(getVlanHeader()->priority);
ostringstream idStream;
idStream << getVlanID();
return "VLAN Layer, Priority: " + priStream.str() + ", Vlan ID: " + idStream.str() + ", CFI: " + cfiStream.str();
}
void VlanLayer::parseNextLayer()
{
if (m_DataLen <= sizeof(vlan_header))
return;
vlan_header* hdr = getVlanHeader();
switch (ntohs(hdr->etherType))
{
case PCPP_ETHERTYPE_IP:
m_NextLayer = new IPv4Layer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
case PCPP_ETHERTYPE_IPV6:
m_NextLayer = new IPv6Layer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
case PCPP_ETHERTYPE_ARP:
m_NextLayer = new ArpLayer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
case PCPP_ETHERTYPE_VLAN:
m_NextLayer = new VlanLayer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
case PCPP_ETHERTYPE_PPPOES:
m_NextLayer = new PPPoESessionLayer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
case PCPP_ETHERTYPE_PPPOED:
m_NextLayer = new PPPoEDiscoveryLayer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
case PCPP_ETHERTYPE_MPLS:
m_NextLayer = new MplsLayer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
break;
default:
m_NextLayer = new PayloadLayer(m_Data + sizeof(vlan_header), m_DataLen - sizeof(vlan_header), this, m_Packet);
}
}
VlanLayer::VlanLayer(const uint16_t vlanID, bool cfi, uint8_t priority, uint16_t etherType)
{
m_DataLen = sizeof(vlan_header);
m_Data = new uint8_t[m_DataLen];
memset(m_Data, 0, m_DataLen);
m_Protocol = VLAN;
vlan_header* vlanHeader = getVlanHeader();
setVlanID(vlanID);
setCFI(cfi);
setPriority(priority);
vlanHeader->etherType = htons(etherType);
}
VlanLayer::VlanLayer(const uint16_t vlanID, bool cfi, uint8_t priority, uint16_t etherType)
{
m_DataLen = sizeof(vlan_header);
m_Data = new uint8_t[m_DataLen];
memset(m_Data, 0, sizeof(m_DataLen));
m_Protocol = VLAN;
vlan_header* vlanHeader = getVlanHeader();
setVlanID(vlanID);
vlanHeader->cfi = cfi;
vlanHeader->priority = 0x07 & priority;
vlanHeader->etherType = htons(etherType);
}
