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Diffstat (limited to '')
| -rw-r--r-- | src/test/test-socket-util.c | 524 |
1 files changed, 524 insertions, 0 deletions
diff --git a/src/test/test-socket-util.c b/src/test/test-socket-util.c new file mode 100644 index 0000000..4ff7d71 --- /dev/null +++ b/src/test/test-socket-util.c @@ -0,0 +1,524 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <fcntl.h> +#include <grp.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +#include "alloc-util.h" +#include "async.h" +#include "escape.h" +#include "exit-status.h" +#include "fd-util.h" +#include "in-addr-util.h" +#include "io-util.h" +#include "log.h" +#include "macro.h" +#include "process-util.h" +#include "socket-util.h" +#include "string-util.h" +#include "tests.h" +#include "tmpfile-util.h" + +assert_cc(SUN_PATH_LEN == 108); + +static void test_ifname_valid(void) { + log_info("/* %s */", __func__); + + assert( ifname_valid("foo")); + assert( ifname_valid("eth0")); + + assert(!ifname_valid("0")); + assert(!ifname_valid("99")); + assert( ifname_valid("a99")); + assert( ifname_valid("99a")); + + assert(!ifname_valid(NULL)); + assert(!ifname_valid("")); + assert(!ifname_valid(" ")); + assert(!ifname_valid(" foo")); + assert(!ifname_valid("bar\n")); + assert(!ifname_valid(".")); + assert(!ifname_valid("..")); + assert(ifname_valid("foo.bar")); + assert(!ifname_valid("x:y")); + + assert( ifname_valid_full("xxxxxxxxxxxxxxx", 0)); + assert(!ifname_valid_full("xxxxxxxxxxxxxxxx", 0)); + assert( ifname_valid_full("xxxxxxxxxxxxxxxx", IFNAME_VALID_ALTERNATIVE)); + assert( ifname_valid_full("xxxxxxxxxxxxxxxx", IFNAME_VALID_ALTERNATIVE)); + assert(!ifname_valid_full("999", IFNAME_VALID_ALTERNATIVE)); + assert( ifname_valid_full("999", IFNAME_VALID_ALTERNATIVE | IFNAME_VALID_NUMERIC)); + assert(!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(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)); +} + +static void test_socket_print_unix(void) { + log_info("/* %s */", __func__); + + /* 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, "<unnamed>"); + test_socket_print_unix_one("\0", 1, "<unnamed>"); + 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"); +} + +static void test_sockaddr_equal(void) { + 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, + }; + + log_info("/* %s */", __func__); + + 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)); +} + +static void test_sockaddr_un_len(void) { + log_info("/* %s */", __func__); + + 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)); +} + +static void test_in_addr_is_multicast(void) { + union in_addr_union a, b; + int f; + + log_info("/* %s */", __func__); + + 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); +} + +static void test_getpeercred_getpeergroups(void) { + int r; + + log_info("/* %s */", __func__); + + 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(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); + } +} + +static void test_passfd_read(void) { + static const char file_contents[] = "test contents for passfd"; + _cleanup_close_pair_ int pair[2] = { -1, -1 }; + int r; + + log_info("/* %s */", __func__); + + 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 */ + char tmpfile[] = "/tmp/test-socket-util-passfd-read-XXXXXX"; + _cleanup_close_ int tmpfd = -1; + + pair[0] = safe_close(pair[0]); + + tmpfd = mkostemp_safe(tmpfile); + assert_se(tmpfd >= 0); + assert_se(write(tmpfd, file_contents, strlen(file_contents)) == (ssize_t) strlen(file_contents)); + tmpfd = safe_close(tmpfd); + + 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)); +} + +static void test_passfd_contents_read(void) { + _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; + + log_info("/* %s */", __func__); + + 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"; + _cleanup_close_ int tmpfd = -1; + + pair[0] = safe_close(pair[0]); + + tmpfd = mkostemp_safe(tmpfile); + assert_se(tmpfd >= 0); + assert_se(write(tmpfd, file_contents, strlen(file_contents)) == (ssize_t) strlen(file_contents)); + tmpfd = safe_close(tmpfd); + + 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)); +} + +static void test_receive_nopassfd(void) { + _cleanup_close_pair_ int pair[2] = { -1, -1 }; + static const char wire_contents[] = "no fd passed here"; + int r; + + log_info("/* %s */", __func__); + + 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); +} + +static void test_send_nodata_nofd(void) { + _cleanup_close_pair_ int pair[2] = { -1, -1 }; + int r; + + log_info("/* %s */", __func__); + + 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); +} + +static void test_send_emptydata(void) { + _cleanup_close_pair_ int pair[2] = { -1, -1 }; + int r; + + log_info("/* %s */", __func__); + + 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); +} + +static void test_flush_accept(void) { + _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) >= 0); + assert_se(listen(listen_dgram, SOMAXCONN) < 0); + assert_se(listen(listen_seqpacket, SOMAXCONN) >= 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); +} + +int main(int argc, char *argv[]) { + test_setup_logging(LOG_DEBUG); + + test_ifname_valid(); + test_socket_print_unix(); + test_sockaddr_equal(); + test_sockaddr_un_len(); + test_in_addr_is_multicast(); + test_getpeercred_getpeergroups(); + test_passfd_read(); + test_passfd_contents_read(); + test_receive_nopassfd(); + test_send_nodata_nofd(); + test_send_emptydata(); + test_flush_accept(); + + return 0; +} |