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Hallyn" , linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, =?iso-8859-1?q?Bj=F6rn?= Roy Baron , Jann Horn , outreachy@lists.linux.dev, netdev@vger.kernel.org Subject: [PATCH v1] landlock: Abstract unix socket restriction tests Message-ID: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Tests for scoping abstract unix sockets. The patch has three types of tests: i) unix_socket: tests the scoping mechanism for a landlocked process, same as ptrace test. ii) optional_scoping: generates three processes with different domains and tests if a process with a non-scoped domain can connect to other processes. iii) unix_sock_special_cases: since the socket's creator credentials are used for scoping datagram sockets, this test examine the cases where the socket's credentials are different from the process who is using it. Closes: https://github.com/landlock-lsm/linux/issues/7 Signed-off-by: Tahera Fahimi --- .../testing/selftests/landlock/ptrace_test.c | 774 ++++++++++++++++++ 1 file changed, 774 insertions(+) diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c index a19db4d0b3bd..7f1e73788869 100644 --- a/tools/testing/selftests/landlock/ptrace_test.c +++ b/tools/testing/selftests/landlock/ptrace_test.c @@ -17,6 +17,10 @@ #include #include +#include +#include +#include + #include "common.h" /* Copied from security/yama/yama_lsm.c */ @@ -436,4 +440,774 @@ TEST_F(hierarchy, trace) _metadata->exit_code = KSFT_FAIL; } +static void create_unix_domain(struct __test_metadata *const _metadata) +{ + int ruleset_fd; + const struct landlock_ruleset_attr ruleset_attr = { + .scoped = LANDLOCK_SCOPED_ABSTRACT_UNIX_SOCKET, + }; + + ruleset_fd = + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); + EXPECT_LE(0, ruleset_fd) + { + TH_LOG("Failed to create a ruleset: %s", strerror(errno)); + } + enforce_ruleset(_metadata, ruleset_fd); + EXPECT_EQ(0, close(ruleset_fd)); +} + +/* clang-format off */ +FIXTURE(unix_socket) +{ + int server, client, dgram_server, dgram_client; +}; +/* clang-format on */ + +FIXTURE_VARIANT(unix_socket) +{ + bool domain_both; + bool domain_parent; + bool domain_child; + bool connect_to_parent; +}; + +/* + * No domain + * + * P1-. P1 -> P2 : allow + * \ P2 -> P1 : allow + * 'P2 + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_without_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = false, + .domain_parent = false, + .domain_child = false, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_without_domain_connect_to_child) { + /* clang-format on */ + .domain_both = false, + .domain_parent = false, + .domain_child = false, + .connect_to_parent = false, +}; + +/* + * Child domain + * + * P1--. P1 -> P2 : allow + * \ P2 -> P1 : deny + * .'-----. + * | P2 | + * '------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_with_one_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = false, + .domain_parent = false, + .domain_child = true, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_with_one_domain_connect_to_child) { + /* clang-format on */ + .domain_both = false, + .domain_parent = false, + .domain_child = true, + .connect_to_parent = false, +}; + +/* + * Parent domain + * .------. + * | P1 --. P1 -> P2 : deny + * '------' \ P2 -> P1 : allow + * ' + * P2 + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_parent_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = false, + .domain_parent = true, + .domain_child = false, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_parent_domain_connect_to_child) { + /* clang-format on */ + .domain_both = false, + .domain_parent = true, + .domain_child = false, + .connect_to_parent = false, +}; + +/* + * Parent + child domain (siblings) + * .------. + * | P1 ---. P1 -> P2 : deny + * '------' \ P2 -> P1 : deny + * .---'--. + * | P2 | + * '------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_sibling_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = false, + .domain_parent = true, + .domain_child = true, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_sibling_domain_connect_to_child) { + /* clang-format on */ + .domain_both = false, + .domain_parent = true, + .domain_child = true, + .connect_to_parent = false, +}; + +/* + * Same domain (inherited) + * .-------------. + * | P1----. | P1 -> P2 : allow + * | \ | P2 -> P1 : allow + * | ' | + * | P2 | + * '-------------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_sibling_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = true, + .domain_parent = false, + .domain_child = false, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_sibling_domain_connect_to_child) { + /* clang-format on */ + .domain_both = true, + .domain_parent = false, + .domain_child = false, + .connect_to_parent = false, +}; + +/* + * Inherited + child domain + * .-----------------. + * | P1----. | P1 -> P2 : allow + * | \ | P2 -> P1 : deny + * | .-'----. | + * | | P2 | | + * | '------' | + * '-----------------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_nested_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = true, + .domain_parent = false, + .domain_child = true, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, allow_nested_domain_connect_to_child) { + /* clang-format on */ + .domain_both = true, + .domain_parent = false, + .domain_child = true, + .connect_to_parent = false, +}; + +/* + * Inherited + parent domain + * .-----------------. + * |.------. | P1 -> P2 : deny + * || P1 ----. | P2 -> P1 : allow + * |'------' \ | + * | ' | + * | P2 | + * '-----------------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_nested_and_parent_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = true, + .domain_parent = true, + .domain_child = false, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_nested_and_parent_domain_connect_to_child) { + /* clang-format on */ + .domain_both = true, + .domain_parent = true, + .domain_child = false, + .connect_to_parent = false, +}; +/* + * Inherited + parent and child domain (siblings) + * .-----------------. + * | .------. | P1 -> P2 : deny + * | | P1 . | P2 -> P1 : deny + * | '------'\ | + * | \ | + * | .--'---. | + * | | P2 | | + * | '------' | + * '-----------------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_forked_domain_connect_to_parent) { + /* clang-format on */ + .domain_both = true, + .domain_parent = true, + .domain_child = true, + .connect_to_parent = true, +}; +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_socket, deny_with_forked_domain_connect_to_child) { + /* clang-format on */ + .domain_both = true, + .domain_parent = true, + .domain_child = true, + .connect_to_parent = false, +}; + +FIXTURE_SETUP(unix_socket) +{ +} + +FIXTURE_TEARDOWN(unix_socket) +{ + close(self->server); + close(self->client); + close(self->dgram_server); + close(self->dgram_client); +} + +/* Test UNIX_STREAM_CONNECT and UNIX_MAY_SEND for parent and child, + * when they have scoped domain or no domain. */ +TEST_F(unix_socket, abstract_unix_socket) +{ + int status; + pid_t child; + socklen_t addrlen; + int sock_len = 5; + struct sockaddr_un addr, dgram_addr = { + .sun_family = AF_UNIX, + }; + const char sun_path[8] = "\0test"; + const char sun_path_dgram[8] = "\0dgrm"; + bool can_connect_to_parent, can_connect_to_child; + int err, err_dgram; + int pipe_child[2], pipe_parent[2]; + char buf_parent; + /* + * can_connect_to_child is true if a parent process can connect to its + * child process. The parent process is not isolated from the child + * with a dedicated Landlock domain. + */ + can_connect_to_child = !variant->domain_parent; + /* + * can_connect_to_parent is true if a child process can connect to its parent + * process. This depends on the child process is not isolated from + * the parent with a dedicated Landlock domain. + */ + can_connect_to_parent = !variant->domain_child; + + ASSERT_EQ(0, pipe2(pipe_child, O_CLOEXEC)); + ASSERT_EQ(0, pipe2(pipe_parent, O_CLOEXEC)); + if (variant->domain_both) { + create_unix_domain(_metadata); + if (!__test_passed(_metadata)) + return; + } + + addrlen = offsetof(struct sockaddr_un, sun_path) + sock_len; + memcpy(&addr.sun_path, sun_path, sock_len); + memcpy(&dgram_addr.sun_path, sun_path_dgram, sock_len); + + child = fork(); + ASSERT_LE(0, child); + if (child == 0) { + char buf_child; + + ASSERT_EQ(0, close(pipe_parent[1])); + ASSERT_EQ(0, close(pipe_child[0])); + if (variant->domain_child) + create_unix_domain(_metadata); + + /* Waits for the parent to be in a domain, if any. */ + ASSERT_EQ(1, read(pipe_parent[0], &buf_child, 1)); + + /* create a socket for child process */ + if (variant->connect_to_parent) { + self->client = socket(AF_UNIX, SOCK_STREAM, 0); + self->dgram_client = socket(AF_UNIX, SOCK_DGRAM, 0); + + ASSERT_NE(-1, self->client); + ASSERT_NE(-1, self->dgram_client); + + ASSERT_EQ(1, read(pipe_parent[0], &buf_child, 1)); + + err = connect(self->client, (struct sockaddr *)&addr, + addrlen); + err_dgram = connect(self->dgram_client, + (struct sockaddr *)&dgram_addr, + addrlen); + if (can_connect_to_parent) { + EXPECT_EQ(0, err); + EXPECT_EQ(0, err_dgram); + } else { + EXPECT_EQ(-1, err); + EXPECT_EQ(-1, err_dgram); + EXPECT_EQ(EPERM, errno); + } + } else { + /* child process should create a listening socket */ + self->server = socket(AF_UNIX, SOCK_STREAM, 0); + self->dgram_server = socket(AF_UNIX, SOCK_DGRAM, 0); + + ASSERT_NE(-1, self->server); + ASSERT_NE(-1, self->dgram_server); + + ASSERT_EQ(0, bind(self->server, + (struct sockaddr *)&addr, addrlen)); + ASSERT_EQ(0, bind(self->dgram_server, + (struct sockaddr *)&dgram_addr, + addrlen)); + ASSERT_EQ(0, listen(self->server, 32)); + + /* signal to parent that child is listening */ + ASSERT_EQ(1, write(pipe_child[1], ".", 1)); + /* wait to connect */ + ASSERT_EQ(1, read(pipe_parent[0], &buf_child, 1)); + } + _exit(_metadata->exit_code); + return; + } + + ASSERT_EQ(0, close(pipe_child[1])); + ASSERT_EQ(0, close(pipe_parent[0])); + + if (variant->domain_parent) + create_unix_domain(_metadata); + + /* Signals that the parent is in a domain, if any. */ + ASSERT_EQ(1, write(pipe_parent[1], ".", 1)); + + if (!variant->connect_to_parent) { + self->client = socket(AF_UNIX, SOCK_STREAM, 0); + self->dgram_client = socket(AF_UNIX, SOCK_DGRAM, 0); + + ASSERT_NE(-1, self->client); + ASSERT_NE(-1, self->dgram_client); + + /* Waits for the child to listen */ + ASSERT_EQ(1, read(pipe_child[0], &buf_parent, 1)); + err = connect(self->client, (struct sockaddr *)&addr, addrlen); + err_dgram = connect(self->dgram_client, + (struct sockaddr *)&dgram_addr, addrlen); + + if (can_connect_to_child) { + EXPECT_EQ(0, err); + EXPECT_EQ(0, err_dgram); + } else { + EXPECT_EQ(-1, err); + EXPECT_EQ(-1, err_dgram); + EXPECT_EQ(EPERM, errno); + } + ASSERT_EQ(1, write(pipe_parent[1], ".", 1)); + } else { + self->server = socket(AF_UNIX, SOCK_STREAM, 0); + self->dgram_server = socket(AF_UNIX, SOCK_DGRAM, 0); + ASSERT_NE(-1, self->server); + ASSERT_NE(-1, self->dgram_server); + ASSERT_EQ(0, bind(self->server, (struct sockaddr *)&addr, + addrlen)); + ASSERT_EQ(0, bind(self->dgram_server, + (struct sockaddr *)&dgram_addr, addrlen)); + ASSERT_EQ(0, listen(self->server, 32)); + + /* signal to child that parent is listening */ + ASSERT_EQ(1, write(pipe_parent[1], ".", 1)); + } + + ASSERT_EQ(child, waitpid(child, &status, 0)); + + if (WIFSIGNALED(status) || !WIFEXITED(status) || + WEXITSTATUS(status) != EXIT_SUCCESS) + _metadata->exit_code = KSFT_FAIL; +} +/* clang-format off */ +FIXTURE(optional_scoping) +{ + int parent_server, child_server, client; +}; +/* clang-format on */ + +/* Domain is defined as follows: + * 0 --> no domain + * 1 --> have domain + * 2 --> have domain and is scoped + **/ +FIXTURE_VARIANT(optional_scoping) +{ + int domain_all; + int domain_parent; + int domain_children; + int domain_child; + int domain_grand_child; + int type; +}; +/* + * .-----------------. + * | ####### | P3 -> P2 : allow + * | P1----# P2 # | P3 -> P1 : deny + * | # | # | + * | # P3 # | + * | ####### | + * '-----------------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(optional_scoping, deny_scoped) { + .domain_all = 1, + .domain_parent = 0, + .domain_children = 2, + .domain_child = 0, + .domain_grand_child = 0, + .type = SOCK_DGRAM, + /* clang-format on */ +}; +/* + * .-----------------. + * | .-----. | P3 -> P2 : allow + * | P1----| P2 | | P3 -> P1 : allow + * | | | | + * | | P3 | | + * | '-----' | + * '-----------------' + */ +/* clang-format off */ +FIXTURE_VARIANT_ADD(optional_scoping, allow_with_domain) { + .domain_all = 1, + .domain_parent = 0, + .domain_children = 1, + .domain_child = 0, + .domain_grand_child = 0, + .type = SOCK_DGRAM, + /* clang-format on */ +}; + +FIXTURE_SETUP(optional_scoping) +{ +} + +FIXTURE_TEARDOWN(optional_scoping) +{ +} + +/* Test UNIX_STREAM_CONNECT and UNIX_MAY_SEND for parent, child + * and grand child processes when they can have scoped or non-scoped + * domains. + **/ +TEST_F(optional_scoping, unix_scoping) +{ + pid_t child; + socklen_t addrlen; + int sock_len = 5; + int status; + struct sockaddr_un addr = { + .sun_family = AF_UNIX, + }; + const char sun_path[8] = "\0test"; + bool can_connect_to_parent, can_connect_to_child; + int pipe_parent[2]; + + if (variant->domain_grand_child == 2) + can_connect_to_child = false; + else + can_connect_to_child = true; + + if (!can_connect_to_child || variant->domain_children == 2) + can_connect_to_parent = false; + else + can_connect_to_parent = true; + + addrlen = offsetof(struct sockaddr_un, sun_path) + sock_len; + memcpy(&addr.sun_path, sun_path, sock_len); + + ASSERT_EQ(0, pipe2(pipe_parent, O_CLOEXEC)); + + if (variant->domain_all == 1) { + create_domain(_metadata); + } else if (variant->domain_all == 2) { + create_unix_domain(_metadata); + } + + child = fork(); + ASSERT_LE(0, child); + if (child == 0) { + int pipe_child[2]; + ASSERT_EQ(0, pipe2(pipe_child, O_CLOEXEC)); + pid_t grand_child; + struct sockaddr_un child_addr = { + .sun_family = AF_UNIX, + }; + const char child_sun_path[8] = "\0tsst"; + + memcpy(&child_addr.sun_path, child_sun_path, sock_len); + + if (variant->domain_children == 1) { + create_domain(_metadata); + } else if (variant->domain_children == 2) { + create_unix_domain(_metadata); + } + grand_child = fork(); + ASSERT_LE(0, grand_child); + if (grand_child == 0) { + ASSERT_EQ(0, close(pipe_parent[1])); + ASSERT_EQ(0, close(pipe_child[1])); + + char buf1, buf2; + int err; + if (variant->domain_child == 1) { + create_domain(_metadata); + } else if (variant->domain_child == 2) { + create_unix_domain(_metadata); + } + + self->client = socket(AF_UNIX, variant->type, 0); + ASSERT_NE(-1, self->client); + + ASSERT_EQ(1, read(pipe_parent[0], &buf1, 1)); + err = connect(self->client, (struct sockaddr *)&addr, + addrlen); + if (can_connect_to_parent) { + EXPECT_EQ(0, err); + } else { + EXPECT_EQ(-1, err); + EXPECT_EQ(EPERM, errno); + } + EXPECT_EQ(0, close(self->client)); + + self->client = socket(AF_UNIX, variant->type, 0); + ASSERT_NE(-1, self->client); + + ASSERT_EQ(1, read(pipe_child[0], &buf2, 1)); + err = connect(self->client, + (struct sockaddr *)&child_addr, addrlen); + if (can_connect_to_child) { + EXPECT_EQ(0, err); + } else { + EXPECT_EQ(-1, err); + EXPECT_EQ(EPERM, errno); + } + + EXPECT_EQ(0, close(self->client)); + + _exit(_metadata->exit_code); + return; + } + + ASSERT_EQ(0, close(pipe_child[0])); + if (variant->domain_child == 1) { + create_domain(_metadata); + } else if (variant->domain_child == 2) { + create_unix_domain(_metadata); + } + + self->child_server = socket(AF_UNIX, variant->type, 0); + ASSERT_NE(-1, self->child_server); + ASSERT_EQ(0, bind(self->child_server, + (struct sockaddr *)&child_addr, addrlen)); + if (variant->type == SOCK_STREAM) + ASSERT_EQ(0, listen(self->child_server, 32)); + + ASSERT_EQ(1, write(pipe_child[1], ".", 1)); + ASSERT_EQ(grand_child, waitpid(grand_child, &status, 0)); + return; + } + ASSERT_EQ(0, close(pipe_parent[0])); + + if (variant->domain_parent == 1) { + create_domain(_metadata); + } else if (variant->domain_parent == 2) { + create_unix_domain(_metadata); + } + + self->parent_server = socket(AF_UNIX, variant->type, 0); + ASSERT_NE(-1, self->parent_server); + ASSERT_EQ(0, + bind(self->parent_server, (struct sockaddr *)&addr, addrlen)); + + if (variant->type == SOCK_STREAM) + ASSERT_EQ(0, listen(self->parent_server, 32)); + /* signal to grand_child that parent is listening */ + ASSERT_EQ(1, write(pipe_parent[1], ".", 1)); + ASSERT_EQ(child, waitpid(child, &status, 0)); + if (WIFSIGNALED(status) || !WIFEXITED(status) || + WEXITSTATUS(status) != EXIT_SUCCESS) + _metadata->exit_code = KSFT_FAIL; +} + +/* The following test is only considered for dgram sockets. + * In all special cases, the client's domain is true. + */ +/* clang-format off */ +FIXTURE(unix_sock_special_cases) { + int server_socket, client; + int stream_server, stream_client; +}; +/* clang-format on */ + +FIXTURE_VARIANT(unix_sock_special_cases) +{ + const bool domain_server; + const bool domain_server_socket; +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_sock_special_cases, allow_server_sock_domain){ + /* clang-format on */ + .domain_server = false, + .domain_server_socket = true, +}; + +/* clang-format off */ +FIXTURE_VARIANT_ADD(unix_sock_special_cases, deny_server_domain){ + /* clang-format off */ + .domain_server = true, + .domain_server_socket = false, +}; + +FIXTURE_SETUP(unix_sock_special_cases) +{ +} + +FIXTURE_TEARDOWN(unix_sock_special_cases) +{ + close(self->client); + close(self->server_socket); + close(self->stream_server); + close(self->stream_client); +} + +/* Test UNIX_STREAM_CONNECT and UNIX_MAY_SEND for parent and + * child processes when conecting socket has different domain + * than the process using it. + **/ +TEST_F(unix_sock_special_cases, dgram_cases) +{ + pid_t child; + socklen_t addrlen; + int sock_len = 5; + struct sockaddr_un addr, addr_stream = { + .sun_family = AF_UNIX, + }; + const char sun_path[8] = "\0test"; + const char sun_path_stream[8] = "\0strm"; + int err, status; + int pipe_child[2], pipe_parent[2]; + char buf_parent; + + ASSERT_EQ(0, pipe2(pipe_child, O_CLOEXEC)); + ASSERT_EQ(0, pipe2(pipe_parent, O_CLOEXEC)); + + addrlen = offsetof(struct sockaddr_un, sun_path) + sock_len; + memcpy(&addr.sun_path, sun_path, sock_len); + + child = fork(); + ASSERT_LE(0, child); + if (child == 0) { + char buf_child; + + ASSERT_EQ(0, close(pipe_parent[1])); + ASSERT_EQ(0, close(pipe_child[0])); + + /* client always has domain */ + create_unix_domain(_metadata); + + if (variant->domain_server_socket) { + int data_socket; + int fd_sock = socket(AF_UNIX, SOCK_DGRAM, 0); + + ASSERT_NE(-1, fd_sock); + + self->stream_server = socket(AF_UNIX, SOCK_STREAM, 0); + + ASSERT_NE(-1, self->stream_server); + memcpy(&addr_stream.sun_path, sun_path_stream, + sock_len); + ASSERT_EQ(0, bind(self->stream_server, + (struct sockaddr *)&addr_stream, + addrlen)); + ASSERT_EQ(0, listen(self->stream_server, 32)); + + ASSERT_EQ(1, write(pipe_child[1], ".", 1)); + + data_socket = accept(self->stream_server, NULL, NULL); + + ASSERT_EQ(0, send_fd(data_socket, fd_sock)); + ASSERT_EQ(0, close(fd_sock)); + TH_LOG("sending completed\n"); + } + + self->client = socket(AF_UNIX, SOCK_DGRAM, 0); + ASSERT_NE(-1, self->client); + /* wait for parent signal for connection */ + ASSERT_EQ(1, read(pipe_parent[0], &buf_child, 1)); + + err = connect(self->client, (struct sockaddr *)&addr, addrlen); + if (!variant->domain_server_socket) { + EXPECT_EQ(-1, err); + EXPECT_EQ(EPERM, errno); + } else { + EXPECT_EQ(0, err); + } + _exit(_metadata->exit_code); + return; + } + + ASSERT_EQ(0, close(pipe_child[1])); + ASSERT_EQ(0, close(pipe_parent[0])); + + if (!variant->domain_server_socket) { + self->server_socket = socket(AF_UNIX, SOCK_DGRAM, 0); + } else { + int cli = socket(AF_UNIX, SOCK_STREAM, 0); + ASSERT_NE(-1, cli); + memcpy(&addr_stream.sun_path, sun_path_stream, sock_len); + ASSERT_EQ(1, read(pipe_child[0], &buf_parent, 1)); + ASSERT_EQ(0, connect(cli, (struct sockaddr *)&addr_stream, + addrlen)); + + self->server_socket = recv_fd(cli); + ASSERT_LE(0, self->server_socket); + } + + ASSERT_NE(-1, self->server_socket); + + if (variant->domain_server) + create_unix_domain(_metadata); + + ASSERT_EQ(0, + bind(self->server_socket, (struct sockaddr *)&addr, addrlen)); + /* signal to child that parent is listening */ + ASSERT_EQ(1, write(pipe_parent[1], ".", 1)); + + ASSERT_EQ(child, waitpid(child, &status, 0)); + + if (WIFSIGNALED(status) || !WIFEXITED(status) || + WEXITSTATUS(status) != EXIT_SUCCESS) + _metadata->exit_code = KSFT_FAIL; +} TEST_HARNESS_MAIN