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Fix serialization for QinQ (#316)

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* Add QinQ Frame

* Fix serialization for QinQ
This commit is contained in:
Teodoro Vargas
2018-10-09 15:02:01 -06:00
committed by Matias Fontanini
parent c26e4943c2
commit 57ac099703
6 changed files with 27 additions and 10 deletions
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1
include/tins/pdu.h
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@@ -170,6 +170,7 @@ public:
ICMPv6,
SLL,
DHCPv6,
DOT1AD,
DOT1Q,
PPPOE,
STP,

7
src/detail/pdu_helpers.cpp
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@@ -211,6 +211,8 @@ Constants::Ethernet::e pdu_flag_to_ether_type(PDU::PDUType flag) {
return Constants::Ethernet::ARP;
case PDU::DOT1Q:
return Constants::Ethernet::VLAN;
case PDU::DOT1AD:
return Constants::Ethernet::QINQ;
case PDU::PPPOE:
return Constants::Ethernet::PPPOED;
case PDU::MPLS:
@@ -238,6 +240,9 @@ PDU::PDUType ether_type_to_pdu_flag(Constants::Ethernet::e flag) {
return PDU::ARP;
case Constants::Ethernet::VLAN:
return PDU::DOT1Q;
case Constants::Ethernet::QINQ:
case Constants::Ethernet::OLD_QINQ:
return PDU::DOT1AD;
case Constants::Ethernet::PPPOED:
return PDU::PPPOE;
//case PDU::RSNEAPOL
@@ -295,4 +300,4 @@ PDU::PDUType ip_type_to_pdu_flag(Constants::IP::e flag) {
}
} // Internals
} // Tins
} // Tins

11
src/dot1q.cpp
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@@ -107,15 +107,10 @@ uint32_t Dot1Q::trailer_size() const {
void Dot1Q::write_serialization(uint8_t* buffer, uint32_t total_sz) {
OutputMemoryStream stream(buffer, total_sz);
if (inner_pdu()) {
Constants::Ethernet::e flag;
Constants::Ethernet::e flag = Constants::Ethernet::UNKNOWN;
PDUType type = inner_pdu()->pdu_type();
if (type == PDU::DOT1Q) {
flag = Constants::Ethernet::QINQ;
}
else {
// Set the appropriate payload type flag
flag = Internals::pdu_flag_to_ether_type(type);
}
// Set the appropriate payload type flag
flag = Internals::pdu_flag_to_ether_type(type);
if (flag != Constants::Ethernet::UNKNOWN) {
payload_type(static_cast<uint16_t>(flag));
}

11
src/ethernetII.cpp
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@@ -156,7 +156,7 @@ bool EthernetII::matches_response(const uint8_t* ptr, uint32_t total_sz) const {
void EthernetII::write_serialization(uint8_t* buffer, uint32_t total_sz) {
OutputMemoryStream stream(buffer, total_sz);
if (inner_pdu()) {
Constants::Ethernet::e flag;
Constants::Ethernet::e flag = Constants::Ethernet::UNKNOWN;
const PDUType type = inner_pdu()->pdu_type();
// Dirty trick to successfully tag PPPoE session/discovery packets
if (type == PDU::PPPOE) {
@@ -164,6 +164,15 @@ void EthernetII::write_serialization(uint8_t* buffer, uint32_t total_sz) {
flag = (pppoe->code() == 0) ? Constants::Ethernet::PPPOES
: Constants::Ethernet::PPPOED;
}
// Dirty trick: Double Dot1Q is interpreted as Dot1AD
else if (type == PDU::DOT1Q) {
if (inner_pdu()->inner_pdu()) {
const PDUType inner_type = inner_pdu()->inner_pdu()->pdu_type();
if (inner_type == PDU::DOT1Q) {
flag = Constants::Ethernet::QINQ;
}
}
}
else {
flag = Internals::pdu_flag_to_ether_type(type);
}

1
src/utils/pdu_utils.cpp
View File

@@ -81,6 +81,7 @@ string to_string(PDU::PDUType pduType) {
ENUM_TEXT(ICMPv6);
ENUM_TEXT(SLL);
ENUM_TEXT(DHCPv6);
ENUM_TEXT(DOT1AD);
ENUM_TEXT(DOT1Q);
ENUM_TEXT(PPPOE);
ENUM_TEXT(STP);

6
tests/src/dot1q_test.cpp
View File

@@ -86,6 +86,12 @@ TEST_F(Dot1QTest, QinQ) {
EthernetII pkt = EthernetII() / Dot1Q(10) / Dot1Q(42) / IP("192.168.1.2") /
TCP(23, 45) / RawPDU("asdasdasd");
PDU::serialization_type buffer = pkt.serialize();
// First PID of the serialized packet should be Dot1AD = 0x88a8
EXPECT_EQ(buffer[12], 0x88);
EXPECT_EQ(buffer[13], 0xa8);
// Second PID of the serialized packet chouls be Dot1Q = 0x8100
EXPECT_EQ(buffer[16], 0x81);
EXPECT_EQ(buffer[17], 0x00);
EthernetII pkt2(&buffer[0], buffer.size());
const Dot1Q& q1 = pkt2.rfind_pdu<Dot1Q>();
ASSERT_TRUE(q1.inner_pdu() != NULL);