/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include "bpf-socket-bind.h" #include "load-fragment.h" #include "manager.h" #include "process-util.h" #include "rlimit-util.h" #include "rm-rf.h" #include "service.h" #include "strv.h" #include "tests.h" #include "unit.h" #include "virt.h" static int find_netcat_executable(char **ret_path) { char **candidates = STRV_MAKE("ncat", "nc", "netcat"); int r = 0; STRV_FOREACH(c, candidates) { r = find_executable(*c, ret_path); if (r == 0) break; } return r; } static int test_socket_bind( Manager *m, const char *unit_name, const char *netcat_path, const char *port, char **allow_rules, char **deny_rules) { _cleanup_free_ char *exec_start = NULL; _cleanup_(unit_freep) Unit *u = NULL; CGroupContext *cc = NULL; int cld_code, r; assert_se(u = unit_new(m, sizeof(Service))); assert_se(unit_add_name(u, unit_name) == 0); assert_se(cc = unit_get_cgroup_context(u)); STRV_FOREACH(rule, allow_rules) { r = config_parse_cgroup_socket_bind( u->id, "filename", 1, "Service", 1, "SocketBindAllow", 0, *rule, &cc->socket_bind_allow, u); if (r < 0) return log_unit_error_errno(u, r, "Failed to parse SocketBindAllow: %m"); } fprintf(stderr, "SocketBindAllow: "); cgroup_context_dump_socket_bind_items(cc->socket_bind_allow, stderr); fputc('\n', stderr); STRV_FOREACH(rule, deny_rules) { r = config_parse_cgroup_socket_bind( u->id, "filename", 1, "Service", 1, "SocketBindDeny", 0, *rule, &cc->socket_bind_deny, u); if (r < 0) return log_unit_error_errno(u, r, "Failed to parse SocketBindDeny: %m"); } fprintf(stderr, "SocketBindDeny: "); cgroup_context_dump_socket_bind_items(cc->socket_bind_deny, stderr); fputc('\n', stderr); exec_start = strjoin("-timeout --preserve-status -sSIGTERM 1s ", netcat_path, " -l ", port, " -vv"); assert_se(exec_start != NULL); r = config_parse_exec(u->id, "filename", 1, "Service", 1, "ExecStart", SERVICE_EXEC_START, exec_start, SERVICE(u)->exec_command, u); if (r < 0) return log_error_errno(r, "Failed to parse ExecStart"); SERVICE(u)->type = SERVICE_ONESHOT; u->load_state = UNIT_LOADED; r = unit_start(u, NULL); if (r < 0) return log_error_errno(r, "Unit start failed %m"); while (!IN_SET(SERVICE(u)->state, SERVICE_DEAD, SERVICE_FAILED)) { r = sd_event_run(m->event, UINT64_MAX); if (r < 0) return log_error_errno(errno, "Event run failed %m"); } cld_code = SERVICE(u)->exec_command[SERVICE_EXEC_START]->exec_status.code; if (cld_code != CLD_EXITED) return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "ExecStart didn't exited, code='%s'", sigchld_code_to_string(cld_code)); if (SERVICE(u)->state != SERVICE_DEAD) return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Service is not dead"); return 0; } int main(int argc, char *argv[]) { _cleanup_free_ char *unit_dir = NULL, *netcat_path = NULL; _cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL; _cleanup_(manager_freep) Manager *m = NULL; struct rlimit rl; int r; test_setup_logging(LOG_DEBUG); if (detect_container() > 0) return log_tests_skipped("test-socket-bind fails inside LXC and Docker containers: https://github.com/systemd/systemd/issues/9666"); assert_se(getrlimit(RLIMIT_MEMLOCK, &rl) >= 0); rl.rlim_cur = rl.rlim_max = MAX(rl.rlim_max, CAN_MEMLOCK_SIZE); (void) setrlimit_closest(RLIMIT_MEMLOCK, &rl); if (!can_memlock()) return log_tests_skipped("Can't use mlock()"); r = bpf_socket_bind_supported(); if (r <= 0) return log_tests_skipped("socket-bind is not supported"); if (find_netcat_executable(&netcat_path) != 0) return log_tests_skipped("Cannot find netcat executable"); r = enter_cgroup_subroot(NULL); if (r == -ENOMEDIUM) return log_tests_skipped("cgroupfs not available"); assert_se(get_testdata_dir("units", &unit_dir) >= 0); assert_se(set_unit_path(unit_dir) >= 0); assert_se(runtime_dir = setup_fake_runtime_dir()); assert_se(manager_new(RUNTIME_SCOPE_USER, MANAGER_TEST_RUN_BASIC, &m) >= 0); assert_se(manager_startup(m, NULL, NULL, NULL) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "2000", STRV_MAKE("2000"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "2000", STRV_MAKE("ipv6:2001-2002"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("ipv4:6666", "6667"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("6667", "6668", ""), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "7777", STRV_MAKE_EMPTY, STRV_MAKE_EMPTY) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "8888", STRV_MAKE("any"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "8888", STRV_MAKE("ipv6:tcp:8888-8889"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "10000", STRV_MAKE("ipv6:udp:9999-10000"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("ipv4:tcp:6666"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("ipv4:udp:6666"), STRV_MAKE("any")) >= 0); assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("tcp:6666"), STRV_MAKE("any")) >= 0); return 0; }