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-rw-r--r--src/test/test-socket-util.c528
1 files changed, 528 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..2da98e7
--- /dev/null
+++ b/src/test/test-socket-util.c
@@ -0,0 +1,528 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <fcntl.h>
+#include <grp.h>
+#include <net/if_arp.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 "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, "<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");
+}
+
+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);
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