sockpp/tests/unit/test_unix_address.cpp

// test_unix_address.cpp
//
// Unit tests for the `unix_address` class.
//

// --------------------------------------------------------------------------
// This file is part of the "sockpp" C++ socket library.
//
// Copyright (c) 2018 Frank Pagliughi
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// --------------------------------------------------------------------------
//

#include "sockpp/unix_address.h"
#include "catch2_version.h"
#include <string>

using namespace sockpp;

std::string PATH { "/tmp/sock" };

TEST_CASE("unix_address sizes", "[address]") {
	#if defined(__linux__)
		REQUIRE(108 == unix_address::MAX_PATH_NAME);
	#endif

	// On most systems, size should be 104, 108, or larger.
	REQUIRE(unix_address::MAX_PATH_NAME > 64);
}

TEST_CASE("unix_address default constructor", "[address]") {
    unix_address addr;

    REQUIRE(!addr.is_set());
    REQUIRE(addr.path().empty());
    REQUIRE(sizeof(sockaddr_un) == addr.size());

    // TODO: Do we have a unix_address::create() method yet?
}

TEST_CASE("unix_address path constructor", "[address]") {
    unix_address addr(PATH);

    REQUIRE(addr.is_set());
    REQUIRE(PATH == addr.path());
    REQUIRE(sizeof(sockaddr_un) == addr.size());

    // Check the low-level struct
    REQUIRE(AF_UNIX == addr.sockaddr_un_ptr()->sun_family);
    REQUIRE(0 == strncmp(PATH.c_str(),
                         (const char*) &addr.sockaddr_un_ptr()->sun_path,
                         unix_address::MAX_PATH_NAME));

    SECTION("copy constructor") {
        unix_address addr2(addr);

        REQUIRE(addr2.is_set());
        REQUIRE(PATH == addr2.path());
        REQUIRE(sizeof(sockaddr_un) == addr2.size());

        // Check the low-level struct
        REQUIRE(AF_UNIX == addr2.sockaddr_un_ptr()->sun_family);
        REQUIRE(0 == strncmp(PATH.c_str(),
                            (const char*) &addr2.sockaddr_un_ptr()->sun_path,
                            unix_address::MAX_PATH_NAME));
    }

    SECTION("sockaddr conversions") {
        auto sa = addr.sockaddr_ptr();
        unix_address addr2(*sa);

        REQUIRE(addr2.is_set());
        REQUIRE(PATH == addr2.path());
        REQUIRE(sizeof(sockaddr_un) == addr2.size());

        // Check the low-level struct
        REQUIRE(AF_UNIX == addr2.sockaddr_un_ptr()->sun_family);
        REQUIRE(0 == strncmp(PATH.c_str(),
                             (const char*) &addr2.sockaddr_un_ptr()->sun_path,
                             unix_address::MAX_PATH_NAME));
    }

	SECTION("full path") {
		// Test what happens if 'sun_path' is full, with no NUL termination
		std::string path;
		sockaddr_un unaddr;
		unaddr.sun_family = AF_UNIX;

		for (size_t i=0; i<unix_address::MAX_PATH_NAME; ++i) {
			char c = 'a' + (i % 26);
			unaddr.sun_path[i] = c;
			path.push_back(c);
		}

		// sockaddr_un constructor
		unix_address addr(unaddr);
		REQUIRE(unix_address::MAX_PATH_NAME == addr.path().size());
		REQUIRE(path == addr.path());

		// path (string) constructor
		unix_address addr2(path);
		REQUIRE(unix_address::MAX_PATH_NAME == addr2.path().size());
		REQUIRE(path == addr2.path());
	}
}

TEST_CASE("unix_address sockaddr_un constructor", "[address]") {
    sockaddr_un unaddr;
    unaddr.sun_family = AF_UNIX;
    strcpy(unaddr.sun_path, PATH.c_str());

    unix_address addr(unaddr);

    REQUIRE(addr.is_set());
    REQUIRE(PATH == addr.path());
    REQUIRE(sizeof(sockaddr_un) == addr.size());

    // Check the low-level struct
    REQUIRE(AF_UNIX == addr.sockaddr_un_ptr()->sun_family);
    REQUIRE(0 == strncmp(PATH.c_str(),
                         (const char*) &addr.sockaddr_un_ptr()->sun_path,
                         unix_address::MAX_PATH_NAME));

    SECTION("reject bad sockaddr_un") {
        unaddr.sun_family = AF_INET;
        REQUIRE_THROWS_AS([&] {
            unix_address addr2(unaddr);
        }(), std::invalid_argument);
    }
}