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libtins/tests/src/ipv6_test.cpp
Kasper Laudrup fa79582b89 Add parsing of well known IPv6 extension headers (#287) 
* Add parsing of well known IPv6 extension headers

Add classes for IPv6 extension headers defined in the IPv6 protocol
specification (RFC 2460) as well as functions for creating them from
the IPv6 class' ext_header type.

The currently known extension headers are Hop-By-Hop Option,
Destination Routing, Routing and Fragment.

* Cleanup after PR #287 comments

Pull in stuff from the std namespace with "using" instead of
qualifying with std::.

Keep starting braces on the same line.

Avoid potential copy when appending to vector.
2018-03-28 21:05:01 -07:00

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#include <gtest/gtest.h>
#include <cstring>
#include <string>
#include <stdint.h>
#include <tins/ipv6.h>
#include <tins/tcp.h>
#include <tins/udp.h>
#include <tins/icmp.h>
#include <tins/icmpv6.h>
#include <tins/rawpdu.h>
#include <tins/ethernetII.h>
#include <tins/ipv6_address.h>
using namespace std;
using namespace Tins;
#ifdef _WIN32
#define TINS_DEFAULT_TEST_IP "::"
#else
#define TINS_DEFAULT_TEST_IP "::1"
#endif
class IPv6Test : public testing::Test {
public:
static const uint8_t expected_packet1[], expected_packet2[],
hop_by_hop_options[], broken1[],
fcs_suffix[], routing_header[];
void test_equals(IPv6& ip1, IPv6& ip2);
};
const uint8_t IPv6Test::expected_packet1[] = {
105, 168, 39, 52, 0, 40, 6, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 198, 140,
0, 80, 104, 72, 3, 12, 0, 0, 0, 0, 160, 2, 127, 240, 183, 120, 0, 0, 2,
4, 63, 248, 4, 2, 8, 10, 0, 132, 163, 156, 0, 0, 0, 0, 1, 3, 3, 7
};
const uint8_t IPv6Test::expected_packet2[] = {
96, 0, 0, 0, 0, 36, 0, 1, 254, 128, 0, 0, 0, 0, 0, 0, 2, 208, 9, 255,
254, 227, 232, 222, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
22, 58, 0, 5, 2, 0, 0, 1, 0, 143, 0, 116, 254, 0, 0, 0, 1, 4, 0, 0,
0, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 255, 152, 6, 225
};
const uint8_t IPv6Test::hop_by_hop_options[] = {
0, 1, 1, 0, 0, 2, 0, 1, 1, 0, 0, 1, 134, 221, 96, 0, 0, 0, 0, 180, 0, 255, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 58, 1,
0, 0, 0, 0, 0, 0, 5, 2, 0, 0, 0, 0, 0, 0, 143, 0, 27, 180, 0, 0, 0, 1, 1, 2, 0, 8, 255,
2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 255, 2, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 255, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 255, 0, 0, 9,
222, 173, 190, 239, 190, 173, 254, 237
};
const uint8_t IPv6Test::broken1[] = {
51, 51, 0, 0, 0, 251, 96, 3, 8, 165, 51, 186, 134, 221, 96, 14, 233, 9, 0, 11, 44, 255,
254, 128, 0, 0, 0, 0, 0, 0, 98, 3, 8, 255, 254, 165, 51, 186, 255, 2, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 251, 17, 0, 11, 80, 53, 98, 2, 81, 72, 50, 10
};
const uint8_t IPv6Test::fcs_suffix[] = {
0x33, 0x33, 0xff, 0x01, 0x31, 0x3e, 0x64, 0x3f, 0x5f, 0x01, 0x31, 0x3e, 0x86, 0xdd, 0x60, 0x00,
0x00, 0x00, 0x00, 0x18, 0x3a, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0xff, 0x01, 0x31, 0x3e, 0x87, 0x00, 0x55, 0x69, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x80,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x3f, 0x5f, 0xff, 0xfe, 0x01, 0x31, 0x3e, 0x23, 0x0c,
0x57, 0xb7
};
const uint8_t IPv6Test::routing_header[] = {
134, 147, 35, 211, 55, 142, 34, 26, 149, 214, 122, 35, 134, 221,
96, 15, 187, 116, 0, 136, 43, 63, 252, 0, 0, 66, 0, 0, 0, 1, 0, 0
, 0, 0, 0, 0, 0, 2, 252, 0, 0, 2, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0
, 1, 41, 6, 4, 2, 2, 0, 0, 0, 252, 0, 0, 2, 0, 0, 0, 6, 0, 0, 0,
0, 0, 0, 0, 1, 252, 0, 0, 2, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 1,
252, 0, 0, 2, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 1, 96, 15, 187,
116, 0, 40, 6, 64, 252, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
1, 252, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 31, 144,
169, 160, 186, 49, 30, 141, 2, 27, 99, 141, 160, 18, 112, 248,
138, 245, 0, 0, 2, 4, 7, 148, 4, 2, 8, 10, 128, 29, 165, 34, 128,
29, 165, 34, 1, 3, 3, 7
};
void IPv6Test::test_equals(IPv6& ip1, IPv6& ip2) {
EXPECT_EQ(ip1.version(), ip2.version());
EXPECT_EQ(ip1.traffic_class(), ip2.traffic_class());
EXPECT_EQ(ip1.flow_label(), ip2.flow_label());
EXPECT_EQ(ip1.payload_length(), ip2.payload_length());
EXPECT_EQ(ip1.next_header(), ip2.next_header());
EXPECT_EQ(ip1.hop_limit(), ip2.hop_limit());
EXPECT_EQ(ip1.dst_addr(), ip2.dst_addr());
EXPECT_EQ(ip1.src_addr(), ip2.src_addr());
EXPECT_EQ(ip1.search_header(IPv6::HOP_BY_HOP) != NULL,
ip2.search_header(IPv6::HOP_BY_HOP) != NULL);
const IPv6::ext_header* header1 = ip1.search_header(IPv6::HOP_BY_HOP),
*header2 = ip2.search_header(IPv6::HOP_BY_HOP);
if(header1 && header2) {
EXPECT_EQ(header1->data_size(), header2->data_size());
}
EXPECT_EQ(ip1.inner_pdu() != NULL, ip2.inner_pdu() != NULL);
const ICMPv6* icmp1 = ip1.find_pdu<ICMPv6>(), *icmp2 = ip2.find_pdu<ICMPv6>();
ASSERT_EQ(icmp1 != NULL, icmp2 != NULL);
if(icmp1 && icmp2) {
EXPECT_EQ(icmp1->checksum(), icmp2->checksum());
}
}
TEST_F(IPv6Test, Constructor) {
IPv6 ipv6("::1:2:3", "f0aa:beef::1");
EXPECT_EQ(ipv6.version(), 6);
EXPECT_EQ(ipv6.traffic_class(), 0);
EXPECT_EQ(ipv6.flow_label(), 0U);
EXPECT_EQ(ipv6.payload_length(), 0);
EXPECT_EQ(ipv6.next_header(), 0);
EXPECT_EQ(ipv6.hop_limit(), 0);
EXPECT_EQ(ipv6.dst_addr(), "::1:2:3");
EXPECT_EQ(ipv6.src_addr(), "f0aa:beef::1");
}
TEST_F(IPv6Test, ConstructorFromBuffer) {
IPv6 ipv6(expected_packet1, sizeof(expected_packet1));
EXPECT_EQ(ipv6.version(), 6);
EXPECT_EQ(ipv6.traffic_class(), 0x9a);
EXPECT_EQ(ipv6.flow_label(), 0x82734U);
EXPECT_EQ(ipv6.payload_length(), 40);
EXPECT_EQ(ipv6.next_header(), 6);
EXPECT_EQ(ipv6.hop_limit(), 64);
EXPECT_EQ(ipv6.dst_addr(), "::1");
EXPECT_EQ(ipv6.src_addr(), "::1");
ASSERT_TRUE(ipv6.inner_pdu() != NULL);
TCP* tcp = ipv6.find_pdu<TCP>();
ASSERT_TRUE(tcp != NULL);
EXPECT_EQ(tcp->sport(), 50828);
EXPECT_EQ(tcp->dport(), 80);
}
// This one has a hop-by-hop ext header
TEST_F(IPv6Test, ConstructorFromBuffer2) {
IPv6 ipv6(expected_packet2, sizeof(expected_packet2));
EXPECT_EQ(ipv6.version(), 6);
EXPECT_EQ(ipv6.traffic_class(), 0);
EXPECT_EQ(ipv6.flow_label(), 0U);
EXPECT_EQ(ipv6.payload_length(), 36);
EXPECT_EQ(ipv6.next_header(), IPv6::HOP_BY_HOP);
EXPECT_EQ(ipv6.hop_limit(), 1);
EXPECT_EQ(ipv6.dst_addr(), "ff02::16");
EXPECT_EQ(ipv6.src_addr(), "fe80::2d0:9ff:fee3:e8de");
ICMPv6* pdu = ipv6.find_pdu<ICMPv6>();
ASSERT_TRUE(pdu != NULL);
EXPECT_EQ(pdu->type(), 143);
EXPECT_EQ(pdu->code(), 0);
EXPECT_EQ(pdu->checksum(), 0x74fe);
EXPECT_EQ(pdu->checksum(), 0x74fe);
const IPv6::ext_header* header = ipv6.search_header(IPv6::HOP_BY_HOP);
ASSERT_TRUE(header != NULL);
EXPECT_EQ(header->data_size(), 6U);
}
TEST_F(IPv6Test, ConstructorFromBuffer_MLD2_Packet) {
EthernetII eth(hop_by_hop_options, sizeof(hop_by_hop_options));
PDU::serialization_type buffer = eth.serialize();
EXPECT_EQ(
PDU::serialization_type(
hop_by_hop_options,
hop_by_hop_options + sizeof(hop_by_hop_options)
),
buffer
);
}
TEST_F(IPv6Test, Serialize) {
IPv6 ip1(expected_packet1, sizeof(expected_packet1));
IPv6::serialization_type buffer = ip1.serialize();
ASSERT_EQ(buffer.size(), sizeof(expected_packet1));
EXPECT_EQ(
IPv6::serialization_type(expected_packet1, expected_packet1 + sizeof(expected_packet1)),
buffer
);
IPv6 ip2(&buffer[0], (uint32_t)buffer.size());
test_equals(ip1, ip2);
}
TEST_F(IPv6Test, Broken1) {
EthernetII pkt(broken1, sizeof(broken1));
EXPECT_EQ(
PDU::serialization_type(broken1, broken1 + sizeof(broken1)),
pkt.serialize()
);
}
TEST_F(IPv6Test, FCSSuffix) {
EthernetII pkt(fcs_suffix, sizeof(fcs_suffix));
EXPECT_EQ(pkt.rfind_pdu<IPv6>().payload_length(), 24u);
EXPECT_EQ(pkt.rfind_pdu<ICMPv6>().size(), 24u);
EXPECT_EQ(
PDU::serialization_type(fcs_suffix, fcs_suffix + pkt.size()),
pkt.serialize()
);
}
TEST_F(IPv6Test, Version) {
IPv6 ipv6;
ipv6.version(3);
EXPECT_EQ(ipv6.version(), 3);
}
TEST_F(IPv6Test, TrafficClass) {
IPv6 ipv6;
ipv6.traffic_class(0x7a);
EXPECT_EQ(ipv6.traffic_class(), 0x7a);
}
TEST_F(IPv6Test, FlowLabel) {
IPv6 ipv6;
ipv6.flow_label(0x918d7);
EXPECT_EQ(ipv6.flow_label(), 0x918d7U);
}
TEST_F(IPv6Test, PayloadLength) {
IPv6 ipv6;
ipv6.payload_length(0xaf71);
EXPECT_EQ(ipv6.payload_length(), 0xaf71U);
}
TEST_F(IPv6Test, NextHeader) {
IPv6 ipv6;
ipv6.next_header(0x7a);
EXPECT_EQ(ipv6.next_header(), 0x7a);
}
TEST_F(IPv6Test, HopLimit) {
IPv6 ipv6;
ipv6.hop_limit(0x7a);
EXPECT_EQ(ipv6.hop_limit(), 0x7a);
}
TEST_F(IPv6Test, SourceAddress) {
IPv6 ipv6;
ipv6.src_addr("99af:1293::1");
EXPECT_EQ(ipv6.src_addr(), "99af:1293::1");
}
TEST_F(IPv6Test, DestinationAddress) {
IPv6 ipv6;
ipv6.dst_addr("99af:1293::1");
EXPECT_EQ(ipv6.dst_addr(), "99af:1293::1");
}
// Make sure that a big payload is not considered ICMP extensions
TEST_F(IPv6Test, BigEncapsulatedPacketIsNotConsideredToHaveExtensions) {
IPv6 encapsulated = IPv6(TINS_DEFAULT_TEST_IP) / UDP(99, 12) / RawPDU(std::string(250, 'A'));
EthernetII pkt = EthernetII() / IPv6() / ICMPv6(ICMPv6::TIME_EXCEEDED) / encapsulated;
PDU::serialization_type buffer = pkt.serialize();
EthernetII serialized(&buffer[0], buffer.size());
ASSERT_EQ(encapsulated.size(), serialized.rfind_pdu<RawPDU>().payload().size());
ASSERT_TRUE(serialized.rfind_pdu<ICMPv6>().extensions().extensions().empty());
}
// Use a large buffer. This wil set the length field
TEST_F(IPv6Test, SerializePacketHavingICMPExtensionsWithLengthAndLotsOfPayload) {
IPv6 encapsulated = IPv6(TINS_DEFAULT_TEST_IP) / UDP(99, 12) / RawPDU(std::string(250, 'A'));
EthernetII pkt = EthernetII() / IPv6() / ICMPv6(ICMPv6::TIME_EXCEEDED) / encapsulated;
const uint8_t payload[] = { 24, 150, 1, 1 };
ICMPExtension extension(1, 1);
ICMPExtension::payload_type ext_payload(payload, payload + sizeof(payload));
extension.payload(ext_payload);
pkt.rfind_pdu<ICMPv6>().extensions().add_extension(extension);
PDU::serialization_type buffer = pkt.serialize();
EthernetII serialized(&buffer[0], buffer.size());
ASSERT_EQ(1UL, serialized.rfind_pdu<ICMPv6>().extensions().extensions().size());
EXPECT_EQ(ext_payload, serialized.rfind_pdu<ICMPv6>().extensions().extensions().begin()->payload());
}
// Use a short buffer and set the length field
TEST_F(IPv6Test, SerializePacketHavingICMPExtensionsWithLengthAndShortPayload) {
IPv6 encapsulated = IPv6(TINS_DEFAULT_TEST_IP) / UDP(99, 12) / RawPDU(std::string(40, 'A'));
EthernetII pkt = EthernetII() / IPv6() / ICMPv6(ICMPv6::TIME_EXCEEDED) / encapsulated;
const uint8_t payload[] = { 24, 150, 1, 1 };
ICMPExtension extension(1, 1);
ICMPExtension::payload_type ext_payload(payload, payload + sizeof(payload));
extension.payload(ext_payload);
pkt.rfind_pdu<ICMPv6>().extensions().add_extension(extension);
pkt.rfind_pdu<ICMPv6>().use_length_field(true);
PDU::serialization_type buffer = pkt.serialize();
EthernetII serialized(&buffer[0], buffer.size());
ASSERT_EQ(1UL, serialized.rfind_pdu<ICMPv6>().extensions().extensions().size());
EXPECT_EQ(ext_payload, serialized.rfind_pdu<ICMPv6>().extensions().extensions().begin()->payload());
}
// Use a short buffer and don't set the length field
TEST_F(IPv6Test, SerializePacketHavingICMPExtensionsWithoutLengthAndShortPayload) {
IPv6 encapsulated = IPv6(TINS_DEFAULT_TEST_IP) / UDP(99, 12) / RawPDU(std::string(40, 'A'));
EthernetII pkt = EthernetII() / IPv6() / ICMPv6(ICMPv6::TIME_EXCEEDED) / encapsulated;
const uint8_t payload[] = { 24, 150, 1, 1 };
ICMPExtension extension(1, 1);
ICMPExtension::payload_type ext_payload(payload, payload + sizeof(payload));
extension.payload(ext_payload);
pkt.rfind_pdu<ICMPv6>().extensions().add_extension(extension);
pkt.rfind_pdu<ICMPv6>().use_length_field(false);
PDU::serialization_type buffer = pkt.serialize();
EthernetII serialized(&buffer[0], buffer.size());
ASSERT_EQ(1UL, serialized.rfind_pdu<ICMPv6>().extensions().extensions().size());
EXPECT_EQ(ext_payload, serialized.rfind_pdu<ICMPv6>().extensions().extensions().begin()->payload());
}
TEST_F(IPv6Test, MDLv1Request) {
const uint8_t mldv1[] = {
51, 51, 0, 0, 0, 1, 100, 112, 2, 226, 169, 250, 134, 221, 96, 0, 0, 0, 0, 32, 0, 1, 254,
128, 0, 0, 0, 0, 0, 0, 102, 112, 2, 255, 254, 226, 169, 250, 255, 2, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 58, 0, 5, 2, 0, 0, 0, 0, 130, 0, 70, 203, 39, 16, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
EthernetII pkt(mldv1, sizeof(mldv1));
EXPECT_EQ(
PDU::serialization_type(mldv1, mldv1 + sizeof(mldv1)),
pkt.serialize()
);
}
TEST_F(IPv6Test, OptionIteration) {
EthernetII pkt(routing_header, sizeof(routing_header));
IPv6& ipv6 = pkt.rfind_pdu<IPv6>();
const IPv6::headers_type& headers = ipv6.headers();
ASSERT_EQ(1UL, headers.size());
const IPv6::ext_header& header = headers[0];
EXPECT_EQ(IPv6::ROUTING, header.option());
}
TEST_F(IPv6Test, OptionAddition) {
EthernetII pkt(routing_header, sizeof(routing_header));
IPv6& ipv6 = pkt.rfind_pdu<IPv6>();
// Add a dummy header
ipv6.add_header(IPv6::ext_header(IPv6::AUTHENTICATION));
const IPv6::headers_type& headers = ipv6.headers();
ASSERT_EQ(2UL, headers.size());
EXPECT_EQ(IPv6::ROUTING, headers[0].option());
EXPECT_EQ(IPv6::AUTHENTICATION, headers[1].option());
ipv6.serialize();
EXPECT_EQ(IPv6::ROUTING, headers[0].option());
EXPECT_EQ(IPv6::AUTHENTICATION, headers[1].option());
EXPECT_TRUE(ipv6.search_header(IPv6::ROUTING) != 0);
EXPECT_TRUE(ipv6.search_header(IPv6::AUTHENTICATION) != 0);
}
TEST_F(IPv6Test, HopByHopPadding) {
IPv6 ipv6_header;
ipv6_header.add_header(IPv6::ExtensionHeader::HOP_BY_HOP);
EXPECT_EQ(48UL, ipv6_header.serialize().size());
}
TEST_F(IPv6Test, HopByHopParsing) {
EthernetII pkt(hop_by_hop_options, sizeof(hop_by_hop_options));
IPv6& ipv6 = pkt.rfind_pdu<IPv6>();
const IPv6::headers_type& headers = ipv6.headers();
EXPECT_EQ(1UL, headers.size());
const IPv6::ext_header* ext_header = ipv6.search_header(IPv6::ExtensionHeader::HOP_BY_HOP);
EXPECT_TRUE(ext_header != NULL);
const IPv6::hop_by_hop_header hbh_header = IPv6::hop_by_hop_header::from_extension_header(*ext_header);
EXPECT_EQ(1UL, hbh_header.options.size());
EXPECT_EQ(5, hbh_header.options[0].first);
}
TEST_F(IPv6Test, HopByHopExtensionHeader) {
const uint8_t options[] = {42, 3, 0, 0, 0, 86, 0, 17, 2, 0, 0, 1, 2, 0, 0};
IPv6::ext_header hdr(IPv6::HOP_BY_HOP, options, options + sizeof(options));
IPv6::hop_by_hop_header header = IPv6::hop_by_hop_header::from_extension_header(hdr);
EXPECT_EQ(3UL, header.options.size());
EXPECT_EQ(42, header.options[0].first);
EXPECT_EQ(86, header.options[1].first);
EXPECT_EQ(17, header.options[2].first);
}
TEST_F(IPv6Test, DestinationRoutingExtensionHeader) {
EXPECT_THROW(IPv6::destination_routing_header::from_extension_header(IPv6::HOP_BY_HOP),
invalid_ipv6_extension_header);
IPv6::destination_routing_header header = IPv6::destination_routing_header::from_extension_header(IPv6::DESTINATION_ROUTING_OPTIONS);
EXPECT_EQ(0UL, header.options.size());
}
TEST_F(IPv6Test, RoutingExtensionHeader) {
const uint8_t header_data[] = {42, 17, 0, 0, 0, 0, 0};
IPv6::ext_header hdr(IPv6::ROUTING, header_data, header_data + sizeof(header_data));
IPv6::routing_header header = IPv6::routing_header::from_extension_header(hdr);
EXPECT_EQ(42, header.routing_type);
EXPECT_EQ(17, header.segments_left);
EXPECT_EQ(5UL, header.data.size());
}
TEST_F(IPv6Test, FragmentExtensionHeader) {
const uint8_t header_data[] = {128, 1, 0, 0, 0, 42};
IPv6::ext_header hdr(IPv6::FRAGMENT, header_data, header_data + sizeof(header_data));
IPv6::fragment_header header = IPv6::fragment_header::from_extension_header(hdr);
EXPECT_EQ(4096, header.fragment_offset);
EXPECT_TRUE(header.more_fragments);
EXPECT_EQ(42UL, header.identification);
}
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