IPv4Layer::IPv4Layer(const IPv4Address& srcIP, const IPv4Address& dstIP)
{
initLayer();
iphdr* ipHdr = getIPv4Header();
ipHdr->ipSrc = srcIP.toInt();
ipHdr->ipDst = dstIP.toInt();
}
ArpLayer::ArpLayer(ArpOpcode opCode, const MacAddress& senderMacAddr, const MacAddress& targetMacAddr, const IPv4Address senderIpAddr, const IPv4Address& targetIpAddr)
{
m_DataLen = sizeof(arphdr);
m_Data = new uint8_t[m_DataLen];
memset(m_Data, 0, sizeof(m_DataLen));
m_Protocol = ARP;
arphdr* arpHeader = getArpHeader();
arpHeader->opcode = htons(opCode);
targetMacAddr.copyTo(arpHeader->targetMacAddr);
senderMacAddr.copyTo(arpHeader->senderMacAddr);
arpHeader->targetIpAddr = targetIpAddr.toInt();
arpHeader->senderIpAddr = senderIpAddr.toInt();
}
uint32_t IPReassemblyHashBy3Tuple(const IPv4Address& ipSrc, const IPv4Address& ipDst, uint16_t ipID)
{
ScalarBuffer<uint8_t> vec[3];
uint16_t ipIdNetworkOrder = htons(ipID);
uint32_t ipSrcAsInt = ipSrc.toInt();
uint32_t ipDstAsInt = ipDst.toInt();
vec[0].buffer = (uint8_t*)&ipSrcAsInt;
vec[0].len = 4;
vec[1].buffer = (uint8_t*)&ipDstAsInt;
vec[1].len = 4;
vec[2].buffer = (uint8_t*)&ipIdNetworkOrder;
vec[2].len = 2;
return pcpp::fnv_hash(vec, 3);
}
void icmp_router_address_structure::setRouterAddress(IPv4Address addr, uint32_t preference)
{
routerAddress = addr.toInt();
preferenceLevel = htonl(preference);
}