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#include <doctest/doctest.h>
#include <vector>
#include "wireframe/net/icmp.hpp"
using namespace wireframe::net;
TEST_CASE("parse_icmpv4 decodes an echo request with identifier/sequence") {
std::vector<unsigned char> bytes = {8, 0, 0x00, 0x00, 0x1c, 0x05, 0x00, 0x01};
auto icmp = parse_icmpv4(bytes);
REQUIRE(icmp.has_value());
CHECK(icmp->type == 8);
CHECK(icmp->code == 0);
REQUIRE(icmp->identifier.has_value());
CHECK(*icmp->identifier == 0x1c05);
REQUIRE(icmp->sequence.has_value());
CHECK(*icmp->sequence == 1);
}
TEST_CASE("parse_icmpv4 decodes an echo reply the same way as a request") {
std::vector<unsigned char> bytes = {0, 0, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02};
auto icmp = parse_icmpv4(bytes);
REQUIRE(icmp.has_value());
CHECK(icmp->type == 0);
REQUIRE(icmp->identifier.has_value());
CHECK(*icmp->identifier == 1);
}
TEST_CASE("parse_icmpv4 decodes a non-echo type without an identifier/sequence") {
std::vector<unsigned char> bytes = {3, 1, 0x00, 0x00}; // dest unreachable, host unreachable
auto icmp = parse_icmpv4(bytes);
REQUIRE(icmp.has_value());
CHECK(icmp->type == 3);
CHECK(icmp->code == 1);
CHECK_FALSE(icmp->identifier.has_value());
}
TEST_CASE("parse_icmpv4 rejects a buffer shorter than the fixed header") {
std::vector<unsigned char> bytes(3, 0);
CHECK_FALSE(parse_icmpv4(bytes).has_value());
}
TEST_CASE("icmpv4_type_name covers known types and falls back for unknown ones") {
CHECK(icmpv4_type_name(8) == "Echo Request");
CHECK(icmpv4_type_name(0) == "Echo Reply");
CHECK(icmpv4_type_name(3) == "Destination Unreachable");
CHECK(icmpv4_type_name(200) == "type=200");
}
TEST_CASE("parse_icmpv6 decodes an echo request with identifier/sequence") {
std::vector<unsigned char> bytes = {128, 0, 0x00, 0x00, 0x1c, 0x05, 0x00, 0x01};
auto icmp = parse_icmpv6(bytes);
REQUIRE(icmp.has_value());
CHECK(icmp->type == 128);
REQUIRE(icmp->identifier.has_value());
CHECK(*icmp->identifier == 0x1c05);
}
TEST_CASE("parse_icmpv6 decodes a non-echo type (e.g. Neighbor Solicitation) without id/seq") {
std::vector<unsigned char> bytes = {135, 0, 0x00, 0x00};
auto icmp = parse_icmpv6(bytes);
REQUIRE(icmp.has_value());
CHECK(icmp->type == 135);
CHECK_FALSE(icmp->identifier.has_value());
}
TEST_CASE("icmpv6_type_name covers known types and falls back for unknown ones") {
CHECK(icmpv6_type_name(128) == "Echo Request");
CHECK(icmpv6_type_name(135) == "Neighbor Solicitation");
CHECK(icmpv6_type_name(134) == "Router Advertisement");
CHECK(icmpv6_type_name(250) == "type=250");
}
TEST_CASE("the same type number means something different in each protocol's table") {
// The whole reason these are two separate tables, not one shared by
// number: ICMPv4's echo request is type 8, but ICMPv6's type 8
// isn't in its table at all (echo request is 128 there instead).
CHECK(icmpv4_type_name(8) == "Echo Request");
CHECK(icmpv6_type_name(8) == "type=8");
// And type 4 means "Parameter Problem" in ICMPv6 but is unmapped
// (falls back) in the ICMPv4 table.
CHECK(icmpv6_type_name(4) == "Parameter Problem");
CHECK(icmpv4_type_name(4) == "Source Quench");
}
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