/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include #include #include #include "alloc-util.h" #include "async.h" #include "escape.h" #include "exit-status.h" #include "fd-util.h" #include "fs-util.h" #include "in-addr-util.h" #include "io-util.h" #include "log.h" #include "macro.h" #include "path-util.h" #include "process-util.h" #include "random-util.h" #include "rm-rf.h" #include "socket-util.h" #include "string-util.h" #include "tests.h" #include "tmpfile-util.h" assert_cc(SUN_PATH_LEN == 108); TEST(ifname_valid) { assert_se( ifname_valid("foo")); assert_se( ifname_valid("eth0")); assert_se(!ifname_valid("0")); assert_se(!ifname_valid("99")); assert_se( ifname_valid("a99")); assert_se( ifname_valid("99a")); assert_se(!ifname_valid(NULL)); assert_se(!ifname_valid("")); assert_se(!ifname_valid(" ")); assert_se(!ifname_valid(" foo")); assert_se(!ifname_valid("bar\n")); assert_se(!ifname_valid(".")); assert_se(!ifname_valid("..")); assert_se(ifname_valid("foo.bar")); assert_se(!ifname_valid("x:y")); assert_se( ifname_valid_full("xxxxxxxxxxxxxxx", 0)); assert_se(!ifname_valid_full("xxxxxxxxxxxxxxxx", 0)); assert_se( ifname_valid_full("xxxxxxxxxxxxxxxx", IFNAME_VALID_ALTERNATIVE)); assert_se( ifname_valid_full("xxxxxxxxxxxxxxxx", IFNAME_VALID_ALTERNATIVE)); assert_se(!ifname_valid_full("999", IFNAME_VALID_ALTERNATIVE)); assert_se( ifname_valid_full("999", IFNAME_VALID_ALTERNATIVE | IFNAME_VALID_NUMERIC)); assert_se(!ifname_valid_full("0", IFNAME_VALID_ALTERNATIVE | IFNAME_VALID_NUMERIC)); } static void test_socket_print_unix_one(const char *in, size_t len_in, const char *expected) { _cleanup_free_ char *out = NULL, *c = NULL; assert_se(len_in <= SUN_PATH_LEN); SocketAddress a = { .sockaddr = { .un = { .sun_family = AF_UNIX } }, .size = offsetof(struct sockaddr_un, sun_path) + len_in, .type = SOCK_STREAM, }; memcpy(a.sockaddr.un.sun_path, in, len_in); assert_se(socket_address_print(&a, &out) >= 0); assert_se(c = cescape(in)); log_info("\"%s\" → \"%s\" (expect \"%s\")", in, out, expected); assert_se(streq(out, expected)); } TEST(socket_print_unix) { /* Some additional tests for abstract addresses which we don't parse */ test_socket_print_unix_one("\0\0\0\0", 4, "@\\000\\000\\000"); test_socket_print_unix_one("@abs", 5, "@abs"); test_socket_print_unix_one("\n", 2, "\\n"); test_socket_print_unix_one("", 1, ""); test_socket_print_unix_one("\0", 1, ""); test_socket_print_unix_one("\0_________________________there's 108 characters in this string_____________________________________________", 108, "@_________________________there\\'s 108 characters in this string_____________________________________________"); test_socket_print_unix_one("////////////////////////////////////////////////////////////////////////////////////////////////////////////", 108, "////////////////////////////////////////////////////////////////////////////////////////////////////////////"); test_socket_print_unix_one("\0\a\b\n\255", 6, "@\\a\\b\\n\\255\\000"); } TEST(sockaddr_equal) { union sockaddr_union a = { .in.sin_family = AF_INET, .in.sin_port = 0, .in.sin_addr.s_addr = htobe32(INADDR_ANY), }; union sockaddr_union b = { .in.sin_family = AF_INET, .in.sin_port = 0, .in.sin_addr.s_addr = htobe32(INADDR_ANY), }; union sockaddr_union c = { .in.sin_family = AF_INET, .in.sin_port = 0, .in.sin_addr.s_addr = htobe32(1234), }; union sockaddr_union d = { .in6.sin6_family = AF_INET6, .in6.sin6_port = 0, .in6.sin6_addr = IN6ADDR_ANY_INIT, }; union sockaddr_union e = { .vm.svm_family = AF_VSOCK, .vm.svm_port = 0, .vm.svm_cid = VMADDR_CID_ANY, }; assert_se(sockaddr_equal(&a, &a)); assert_se(sockaddr_equal(&a, &b)); assert_se(sockaddr_equal(&d, &d)); assert_se(sockaddr_equal(&e, &e)); assert_se(!sockaddr_equal(&a, &c)); assert_se(!sockaddr_equal(&b, &c)); assert_se(!sockaddr_equal(&a, &e)); } TEST(sockaddr_un_len) { static const struct sockaddr_un fs = { .sun_family = AF_UNIX, .sun_path = "/foo/bar/waldo", }; static const struct sockaddr_un abstract = { .sun_family = AF_UNIX, .sun_path = "\0foobar", }; assert_se(SOCKADDR_UN_LEN(fs) == offsetof(struct sockaddr_un, sun_path) + strlen(fs.sun_path) + 1); assert_se(SOCKADDR_UN_LEN(abstract) == offsetof(struct sockaddr_un, sun_path) + 1 + strlen(abstract.sun_path + 1)); } TEST(in_addr_is_multicast) { union in_addr_union a, b; int f; assert_se(in_addr_from_string_auto("192.168.3.11", &f, &a) >= 0); assert_se(in_addr_is_multicast(f, &a) == 0); assert_se(in_addr_from_string_auto("224.0.0.1", &f, &a) >= 0); assert_se(in_addr_is_multicast(f, &a) == 1); assert_se(in_addr_from_string_auto("FF01:0:0:0:0:0:0:1", &f, &b) >= 0); assert_se(in_addr_is_multicast(f, &b) == 1); assert_se(in_addr_from_string_auto("2001:db8::c:69b:aeff:fe53:743e", &f, &b) >= 0); assert_se(in_addr_is_multicast(f, &b) == 0); } TEST(getpeercred_getpeergroups) { int r; r = safe_fork("(getpeercred)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL); assert_se(r >= 0); if (r == 0) { static const gid_t gids[] = { 3, 4, 5, 6, 7 }; gid_t *test_gids; size_t n_test_gids; uid_t test_uid; gid_t test_gid; struct ucred ucred; int pair[2]; if (geteuid() == 0) { test_uid = 1; test_gid = 2; test_gids = (gid_t*) gids; n_test_gids = ELEMENTSOF(gids); assert_se(setgroups(n_test_gids, test_gids) >= 0); assert_se(setresgid(test_gid, test_gid, test_gid) >= 0); assert_se(setresuid(test_uid, test_uid, test_uid) >= 0); } else { long ngroups_max; test_uid = getuid(); test_gid = getgid(); ngroups_max = sysconf(_SC_NGROUPS_MAX); assert_se(ngroups_max > 0); test_gids = newa(gid_t, ngroups_max); r = getgroups(ngroups_max, test_gids); assert_se(r >= 0); n_test_gids = (size_t) r; } assert_se(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) >= 0); assert_se(getpeercred(pair[0], &ucred) >= 0); assert_se(ucred.uid == test_uid); assert_se(ucred.gid == test_gid); assert_se(ucred.pid == getpid_cached()); { _cleanup_free_ gid_t *peer_groups = NULL; r = getpeergroups(pair[0], &peer_groups); assert_se(r >= 0 || IN_SET(r, -EOPNOTSUPP, -ENOPROTOOPT)); if (r >= 0) { assert_se((size_t) r == n_test_gids); assert_se(memcmp(peer_groups, test_gids, sizeof(gid_t) * n_test_gids) == 0); } } safe_close_pair(pair); _exit(EXIT_SUCCESS); } } TEST(passfd_read) { static const char file_contents[] = "test contents for passfd"; _cleanup_close_pair_ int pair[2] = { -1, -1 }; int r; assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0); r = safe_fork("(passfd_read)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL); assert_se(r >= 0); if (r == 0) { /* Child */ pair[0] = safe_close(pair[0]); char tmpfile[] = "/tmp/test-socket-util-passfd-read-XXXXXX"; assert_se(write_tmpfile(tmpfile, file_contents) == 0); _cleanup_close_ int tmpfd = open(tmpfile, O_RDONLY); assert_se(tmpfd >= 0); assert_se(unlink(tmpfile) == 0); assert_se(send_one_fd(pair[1], tmpfd, MSG_DONTWAIT) == 0); _exit(EXIT_SUCCESS); } /* Parent */ char buf[64]; struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1); _cleanup_close_ int fd = -1; pair[1] = safe_close(pair[1]); assert_se(receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd) == 0); assert_se(fd >= 0); r = read(fd, buf, sizeof(buf)-1); assert_se(r >= 0); buf[r] = 0; assert_se(streq(buf, file_contents)); } TEST(passfd_contents_read) { _cleanup_close_pair_ int pair[2] = { -1, -1 }; static const char file_contents[] = "test contents in the file"; static const char wire_contents[] = "test contents on the wire"; int r; assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0); r = safe_fork("(passfd_contents_read)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL); assert_se(r >= 0); if (r == 0) { /* Child */ struct iovec iov = IOVEC_INIT_STRING(wire_contents); char tmpfile[] = "/tmp/test-socket-util-passfd-contents-read-XXXXXX"; pair[0] = safe_close(pair[0]); assert_se(write_tmpfile(tmpfile, file_contents) == 0); _cleanup_close_ int tmpfd = open(tmpfile, O_RDONLY); assert_se(tmpfd >= 0); assert_se(unlink(tmpfile) == 0); assert_se(send_one_fd_iov(pair[1], tmpfd, &iov, 1, MSG_DONTWAIT) > 0); _exit(EXIT_SUCCESS); } /* Parent */ char buf[64]; struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1); _cleanup_close_ int fd = -1; ssize_t k; pair[1] = safe_close(pair[1]); k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd); assert_se(k > 0); buf[k] = 0; assert_se(streq(buf, wire_contents)); assert_se(fd >= 0); r = read(fd, buf, sizeof(buf)-1); assert_se(r >= 0); buf[r] = 0; assert_se(streq(buf, file_contents)); } TEST(receive_nopassfd) { _cleanup_close_pair_ int pair[2] = { -1, -1 }; static const char wire_contents[] = "no fd passed here"; int r; assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0); r = safe_fork("(receive_nopassfd)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL); assert_se(r >= 0); if (r == 0) { /* Child */ struct iovec iov = IOVEC_INIT_STRING(wire_contents); pair[0] = safe_close(pair[0]); assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) > 0); _exit(EXIT_SUCCESS); } /* Parent */ char buf[64]; struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1); int fd = -999; ssize_t k; pair[1] = safe_close(pair[1]); k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd); assert_se(k > 0); buf[k] = 0; assert_se(streq(buf, wire_contents)); /* no fd passed here, confirm it was reset */ assert_se(fd == -1); } TEST(send_nodata_nofd) { _cleanup_close_pair_ int pair[2] = { -1, -1 }; int r; assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0); r = safe_fork("(send_nodata_nofd)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL); assert_se(r >= 0); if (r == 0) { /* Child */ pair[0] = safe_close(pair[0]); assert_se(send_one_fd_iov(pair[1], -1, NULL, 0, MSG_DONTWAIT) == -EINVAL); _exit(EXIT_SUCCESS); } /* Parent */ char buf[64]; struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1); int fd = -999; ssize_t k; pair[1] = safe_close(pair[1]); k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd); /* recvmsg() will return errno EAGAIN if nothing was sent */ assert_se(k == -EAGAIN); /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */ assert_se(fd == -999); } TEST(send_emptydata) { _cleanup_close_pair_ int pair[2] = { -1, -1 }; int r; assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0); r = safe_fork("(send_emptydata)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL); assert_se(r >= 0); if (r == 0) { /* Child */ struct iovec iov = IOVEC_INIT_STRING(""); /* zero-length iov */ assert_se(iov.iov_len == 0); pair[0] = safe_close(pair[0]); /* This will succeed, since iov is set. */ assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) == 0); _exit(EXIT_SUCCESS); } /* Parent */ char buf[64]; struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1); int fd = -999; ssize_t k; pair[1] = safe_close(pair[1]); k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd); /* receive_one_fd_iov() returns -EIO if an fd is not found and no data was returned. */ assert_se(k == -EIO); /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */ assert_se(fd == -999); } TEST(flush_accept) { _cleanup_close_ int listen_stream = -1, listen_dgram = -1, listen_seqpacket = 1, connect_stream = -1, connect_dgram = -1, connect_seqpacket = -1; static const union sockaddr_union sa = { .un.sun_family = AF_UNIX }; union sockaddr_union lsa; socklen_t l; listen_stream = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); assert_se(listen_stream >= 0); listen_dgram = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); assert_se(listen_dgram >= 0); listen_seqpacket = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); assert_se(listen_seqpacket >= 0); assert_se(flush_accept(listen_stream) < 0); assert_se(flush_accept(listen_dgram) < 0); assert_se(flush_accept(listen_seqpacket) < 0); assert_se(bind(listen_stream, &sa.sa, sizeof(sa_family_t)) >= 0); assert_se(bind(listen_dgram, &sa.sa, sizeof(sa_family_t)) >= 0); assert_se(bind(listen_seqpacket, &sa.sa, sizeof(sa_family_t)) >= 0); assert_se(flush_accept(listen_stream) < 0); assert_se(flush_accept(listen_dgram) < 0); assert_se(flush_accept(listen_seqpacket) < 0); assert_se(listen(listen_stream, SOMAXCONN_DELUXE) >= 0); assert_se(listen(listen_dgram, SOMAXCONN_DELUXE) < 0); assert_se(listen(listen_seqpacket, SOMAXCONN_DELUXE) >= 0); assert_se(flush_accept(listen_stream) >= 0); assert_se(flush_accept(listen_dgram) < 0); assert_se(flush_accept(listen_seqpacket) >= 0); connect_stream = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); assert_se(connect_stream >= 0); connect_dgram = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); assert_se(connect_dgram >= 0); connect_seqpacket = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); assert_se(connect_seqpacket >= 0); l = sizeof(lsa); assert_se(getsockname(listen_stream, &lsa.sa, &l) >= 0); assert_se(connect(connect_stream, &lsa.sa, l) >= 0); l = sizeof(lsa); assert_se(getsockname(listen_dgram, &lsa.sa, &l) >= 0); assert_se(connect(connect_dgram, &lsa.sa, l) >= 0); l = sizeof(lsa); assert_se(getsockname(listen_seqpacket, &lsa.sa, &l) >= 0); assert_se(connect(connect_seqpacket, &lsa.sa, l) >= 0); assert_se(flush_accept(listen_stream) >= 0); assert_se(flush_accept(listen_dgram) < 0); assert_se(flush_accept(listen_seqpacket) >= 0); } TEST(ipv6_enabled) { log_info("IPv6 supported: %s", yes_no(socket_ipv6_is_supported())); log_info("IPv6 enabled: %s", yes_no(socket_ipv6_is_enabled())); } TEST(sockaddr_un_set_path) { _cleanup_(rm_rf_physical_and_freep) char *t = NULL; _cleanup_(unlink_and_freep) char *sh = NULL; _cleanup_free_ char *j = NULL; union sockaddr_union sa; _cleanup_close_ int fd1 = -1, fd2 = -1, fd3 = -1; assert_se(mkdtemp_malloc("/tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaXXXXXX", &t) >= 0); assert_se(strlen(t) > SUN_PATH_LEN); assert_se(j = path_join(t, "sock")); assert_se(sockaddr_un_set_path(&sa.un, j) == -ENAMETOOLONG); /* too long for AF_UNIX socket */ assert_se(asprintf(&sh, "/tmp/%" PRIx64, random_u64()) >= 0); assert_se(symlink(t, sh) >= 0); /* create temporary symlink, to access it anyway */ free(j); assert_se(j = path_join(sh, "sock")); assert_se(sockaddr_un_set_path(&sa.un, j) >= 0); fd1 = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0); assert_se(fd1 >= 0); assert_se(bind(fd1, &sa.sa, SOCKADDR_LEN(sa)) >= 0); assert_se(listen(fd1, 1) >= 0); sh = unlink_and_free(sh); /* remove temporary symlink */ fd2 = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0); assert_se(fd2 >= 0); assert_se(connect(fd2, &sa.sa, SOCKADDR_LEN(sa)) < 0); assert_se(errno == ENOENT); /* we removed the symlink, must fail */ free(j); assert_se(j = path_join(t, "sock")); fd3 = open(j, O_CLOEXEC|O_PATH|O_NOFOLLOW); assert_se(fd3 > 0); assert_se(sockaddr_un_set_path(&sa.un, FORMAT_PROC_FD_PATH(fd3)) >= 0); /* connect via O_PATH instead, circumventing 108ch limit */ assert_se(connect(fd2, &sa.sa, SOCKADDR_LEN(sa)) >= 0); } DEFINE_TEST_MAIN(LOG_DEBUG);