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◆ main openmsx / src / unittest / UnapiNetWire_test.cc
4.9 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#include "catch.hpp"
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#include "UnapiNetWire.hh"
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#include <array>
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#include <cstdint>
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#include <span>
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#include <vector>
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using namespace openmsx;
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// Compile-time guards: the concept accepts our wire structs and rejects unsafe
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// types (padding, containers, floats).
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static_assert(wire_layout<DetectResult>);
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static_assert(wire_layout<TcpStateResult>);
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static_assert(wire_layout<TcpOpenParams>);
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static_assert(wire_layout<UdpRecvResultHeader>);
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static_assert(wire_layout<IcmpRecvResult>);
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namespace {
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struct Padded { uint8_t a; uint32_t b; }; // has padding -> not unique object rep
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}
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static_assert(!wire_layout<Padded>);
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static_assert(!wire_layout<float>);
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static_assert(!wire_layout<std::vector<uint8_t>>);
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[[nodiscard]] static std::vector<uint8_t> vec(std::span<const uint8_t> s)
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{
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	return {s.begin(), s.end()};
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}
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TEST_CASE("UnapiNetWire: default-constructed structs are valid success frames")
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{
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	// v2 rule 1 baked into the types: '{}' yields status 0x00 - and for
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	// DETECT the full acceptance triplet 00 55 02.
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	CHECK(vec(toBytes(DetectResult{})) ==
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	      std::vector<uint8_t>{0x00, 0x55, 0x02, 0x00, 0x00});
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	CHECK(toBytes(TcpStateResult{})[0]      == 0x00);
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	CHECK(toBytes(TcpRecvResultHeader{})[0] == 0x00);
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	CHECK(toBytes(UdpRecvResultHeader{})[0] == 0x00);
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	CHECK(toBytes(IcmpRecvResult{})[0]      == 0x00);
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	CHECK(toBytes(OpenResult{})[0]          == 0x00);
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	CHECK(toBytes(GetLocalIpResult{})[0]    == 0x00);
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	CHECK(toBytes(UdpStateResult{})[0]      == 0x00);
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}
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TEST_CASE("UnapiNetWire: DETECT result is byte-identical")
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{
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	DetectResult r{};
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	r.caps = 0x1F; // DNS + TCP active/passive + UDP + ICMP
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0x55, 0x02, 0x1F, 0x00});
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}
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TEST_CASE("UnapiNetWire: TCP_STATE result is byte-identical (mixed endian)")
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{
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	TcpStateResult r{};
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	r.state       = 0x04;        // TCP_ESTABLISHED
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	r.avail       = 0x0102;
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	r.closeReason = 0x01;
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	r.remoteIp    = 0xC0A80101;  // 192.168.1.1
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	r.remotePort  = 0x1F90;      // 8080
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	r.localPort   = 0x0050;      // 80
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{
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		0x00, 0x04, 0x02, 0x01, 0x01, 0xC0, 0xA8, 0x01, 0x01, 0x90, 0x1F, 0x50, 0x00});
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}
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TEST_CASE("UnapiNetWire: OPEN result is status + 1-based handle")
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{
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	OpenResult r{};
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	r.handle = 0x03;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0x03});
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}
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TEST_CASE("UnapiNetWire: TCP_RECV header is status + little-endian length")
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{
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	TcpRecvResultHeader r{};
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	r.actualLen = 0x0102;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0x02, 0x01});
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}
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TEST_CASE("UnapiNetWire: GET_LOCALIP result is status + 4-byte big-endian")
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{
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	GetLocalIpResult r{};
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	r.ip = 0xC0A80101;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0xC0, 0xA8, 0x01, 0x01});
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}
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TEST_CASE("UnapiNetWire: UDP_STATE result is status + little-endian size")
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{
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	UdpStateResult r{};
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	r.firstDgramSize = 0x0004;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0x04, 0x00});
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}
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TEST_CASE("UnapiNetWire: DNS_QUERY fast path = status + marker + big-endian IP")
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{
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	DnsQueryResult r{};
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	r.ip = 0xC0A80101;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0x01, 0xC0, 0xA8, 0x01, 0x01});
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}
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TEST_CASE("UnapiNetWire: DNS_STATUS complete = status + state + big-endian IP")
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{
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	DnsStatusResult r{};
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	r.ip = 0x08080808;           // 8.8.8.8
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0x02, 0x08, 0x08, 0x08, 0x08});
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}
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TEST_CASE("UnapiNetWire: DNS_STATUS failed lookup = success carrying bad news")
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{
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	DnsStatusFailed r{};
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	r.sub = 0x03;                // "no such host"
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{0x00, 0xFF, 0x03});
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}
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TEST_CASE("UnapiNetWire: UDP_RECV header (status, IP big, port/len little)")
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{
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	UdpRecvResultHeader r{};
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	r.srcIp     = 0xC0A80101;
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	r.srcPort   = 0x0035;        // 53
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	r.actualLen = 0x0004;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{
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		0x00, 0xC0, 0xA8, 0x01, 0x01, 0x35, 0x00, 0x04, 0x00});
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}
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TEST_CASE("UnapiNetWire: ICMP_RECV record (12 bytes, status replaces hasData)")
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{
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	IcmpRecvResult r{};
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	r.srcIp      = 0x08080808;
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	r.ttl        = 0x40;
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	r.identifier = 0x1234;
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	r.sequence   = 0x0001;
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	r.dataLen    = 0x0020;
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	CHECK(vec(toBytes(r)) == std::vector<uint8_t>{
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		0x00, 0x08, 0x08, 0x08, 0x08, 0x40, 0x34, 0x12, 0x01, 0x00, 0x20, 0x00});
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}
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TEST_CASE("UnapiNetWire: TCP_OPEN params round-trip (IP big, ports little)")
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{
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	std::array<uint8_t, 11> bytes{
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		0xC0, 0xA8, 0x01, 0x01, 0x90, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x02};
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	auto p = fromBytes<TcpOpenParams>(bytes);
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	CHECK(uint32_t(p.remoteIp)   == 0xC0A80101);
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	CHECK(uint16_t(p.remotePort) == 0x1F90);
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	CHECK(uint16_t(p.localPort)  == 0x0000);
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	CHECK(uint16_t(p.timeout)    == 0x0000);
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	CHECK(p.flags                == 0x02);
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}
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TEST_CASE("UnapiNetWire: UDP_SEND param header round-trip")
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{
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	std::array<uint8_t, 9> bytes{
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		0x01, 0xC0, 0xA8, 0x01, 0xFF, 0x99, 0x1F, 0x03, 0x00};
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	auto p = fromBytes<UdpSendParamHeader>(bytes);
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	CHECK(p.handle             == 0x01);
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	CHECK(uint32_t(p.destIp)   == 0xC0A801FF);
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	CHECK(uint16_t(p.destPort) == 0x1F99); // 8089
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	CHECK(uint16_t(p.len)      == 0x0003);
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}