Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 376 insertions, 0 deletions

diff --git a/src/test/test-varlink.c b/src/test/test-varlink.c
new file mode 100644
index 0000000..2617ed0
--- /dev/null
+++ b/src/test/test-varlink.c
@@ -0,0 +1,376 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <fcntl.h>
+#include <poll.h>
+#include <pthread.h>
+
+#include "sd-event.h"
+
+#include "data-fd-util.h"
+#include "fd-util.h"
+#include "json.h"
+#include "rm-rf.h"
+#include "strv.h"
+#include "tests.h"
+#include "tmpfile-util.h"
+#include "user-util.h"
+#include "varlink.h"
+
+/* Let's pick some high value, that is higher than the largest listen() backlog, but leaves enough room below
+   the typical RLIMIT_NOFILE value of 1024 so that we can process both sides of each socket in our
+   process. Or in other words: "OVERLOAD_CONNECTIONS * 2 + x < 1024" should hold, for some small x that
+   should cover any auxiliary fds, the listener server fds, stdin/stdout/stderr and whatever else. */
+#define OVERLOAD_CONNECTIONS 333
+
+static int n_done = 0;
+static int block_write_fd = -EBADF;
+
+static int method_something(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
+        _cleanup_(json_variant_unrefp) JsonVariant *ret = NULL;
+        JsonVariant *a, *b;
+        int64_t x, y;
+        int r;
+
+        a = json_variant_by_key(parameters, "a");
+        if (!a)
+                return varlink_error(link, "io.test.BadParameters", NULL);
+
+        x = json_variant_integer(a);
+
+        b = json_variant_by_key(parameters, "b");
+        if (!b)
+                return varlink_error(link, "io.test.BadParameters", NULL);
+
+        y = json_variant_integer(b);
+
+        r = json_build(&ret, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("sum", JSON_BUILD_INTEGER(x + y))));
+        if (r < 0)
+                return r;
+
+        return varlink_reply(link, ret);
+}
+
+static int method_something_more(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
+        _cleanup_(json_variant_unrefp) JsonVariant *ret = NULL;
+        int r;
+
+        struct Something {
+                int x;
+                int y;
+        };
+
+        static const JsonDispatch dispatch_table[] = {
+                { "a", JSON_VARIANT_INTEGER, json_dispatch_int, offsetof(struct Something, x), JSON_MANDATORY },
+                { "b", JSON_VARIANT_INTEGER, json_dispatch_int, offsetof(struct Something, y), JSON_MANDATORY},
+                {}
+        };
+        struct Something s = {};
+
+        r = varlink_dispatch(link, parameters, dispatch_table, &s);
+        if (r != 0)
+                return r;
+
+        for (int i = 0; i < 5; i++) {
+                _cleanup_(json_variant_unrefp) JsonVariant *w = NULL;
+
+                r = json_build(&w, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("sum", JSON_BUILD_INTEGER(s.x + (s.y * i)))));
+                if (r < 0)
+                        return r;
+
+                r = varlink_notify(link, w);
+                if (r < 0)
+                        return r;
+        }
+
+        r = json_build(&ret, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("sum", JSON_BUILD_INTEGER(s.x + (s.y * 5)))));
+        if (r < 0)
+                return r;
+
+        return varlink_reply(link, ret);
+}
+
+static void test_fd(int fd, const void *buf, size_t n) {
+        char rbuf[n + 1];
+        ssize_t m;
+
+        m = read(fd, rbuf, n + 1);
+        assert_se(m >= 0);
+        assert_se(memcmp_nn(buf, n, rbuf, m) == 0);
+}
+
+static int method_passfd(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
+        _cleanup_(json_variant_unrefp) JsonVariant *ret = NULL;
+        JsonVariant *a;
+        int r;
+
+        a = json_variant_by_key(parameters, "fd");
+        if (!a)
+                return varlink_error(link, "io.test.BadParameters", NULL);
+
+        assert_se(streq_ptr(json_variant_string(a), "whoop"));
+
+        int xx = varlink_peek_fd(link, 0),
+                yy = varlink_peek_fd(link, 1),
+                zz = varlink_peek_fd(link, 2);
+
+        log_info("%i %i %i", xx, yy, zz);
+
+        assert_se(xx >= 0);
+        assert_se(yy >= 0);
+        assert_se(zz >= 0);
+
+        test_fd(xx, "foo", 3);
+        test_fd(yy, "bar", 3);
+        test_fd(zz, "quux", 4);
+
+        _cleanup_close_ int vv = acquire_data_fd("miau", 4, 0);
+        _cleanup_close_ int ww = acquire_data_fd("wuff", 4, 0);
+
+        assert_se(vv >= 0);
+        assert_se(ww >= 0);
+
+        r = json_build(&ret, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("yo", JSON_BUILD_INTEGER(88))));
+        if (r < 0)
+                return r;
+
+        assert_se(varlink_push_fd(link, vv) == 0);
+        assert_se(varlink_push_fd(link, ww) == 1);
+
+        TAKE_FD(vv);
+        TAKE_FD(ww);
+
+        return varlink_reply(link, ret);
+}
+
+static int method_done(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
+
+        if (++n_done == 2)
+                sd_event_exit(varlink_get_event(link), EXIT_FAILURE);
+
+        return 0;
+}
+
+static int reply(Varlink *link, JsonVariant *parameters, const char *error_id, VarlinkReplyFlags flags, void *userdata) {
+        JsonVariant *sum;
+
+        sum = json_variant_by_key(parameters, "sum");
+
+        assert_se(json_variant_integer(sum) == 7+22);
+
+        if (++n_done == 2)
+                sd_event_exit(varlink_get_event(link), EXIT_FAILURE);
+
+        return 0;
+}
+
+static int on_connect(VarlinkServer *s, Varlink *link, void *userdata) {
+        uid_t uid = UID_INVALID;
+
+        assert_se(s);
+        assert_se(link);
+
+        assert_se(varlink_get_peer_uid(link, &uid) >= 0);
+        assert_se(getuid() == uid);
+        assert_se(varlink_set_allow_fd_passing_input(link, true) >= 0);
+        assert_se(varlink_set_allow_fd_passing_output(link, true) >= 0);
+
+        return 0;
+}
+
+static int overload_reply(Varlink *link, JsonVariant *parameters, const char *error_id, VarlinkReplyFlags flags, void *userdata) {
+
+        /* This method call reply should always be called with a disconnection, since the method call should
+         * be talking to an overloaded server */
+
+        log_debug("Over reply triggered with error: %s", strna(error_id));
+        assert_se(streq(error_id, VARLINK_ERROR_DISCONNECTED));
+        sd_event_exit(varlink_get_event(link), 0);
+
+        return 0;
+}
+
+static void flood_test(const char *address) {
+        _cleanup_(varlink_flush_close_unrefp) Varlink *c = NULL;
+        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+        _cleanup_free_ Varlink **connections = NULL;
+        size_t k;
+        char x = 'x';
+
+        log_debug("Flooding server...");
+
+        /* Block the main event loop while we flood */
+        assert_se(write(block_write_fd, &x, sizeof(x)) == sizeof(x));
+
+        assert_se(sd_event_default(&e) >= 0);
+
+        /* Flood the server with connections */
+        assert_se(connections = new0(Varlink*, OVERLOAD_CONNECTIONS));
+        for (k = 0; k < OVERLOAD_CONNECTIONS; k++) {
+                _cleanup_free_ char *t = NULL;
+                log_debug("connection %zu", k);
+                assert_se(varlink_connect_address(connections + k, address) >= 0);
+
+                assert_se(asprintf(&t, "flood-%zu", k) >= 0);
+                assert_se(varlink_set_description(connections[k], t) >= 0);
+                assert_se(varlink_attach_event(connections[k], e, k) >= 0);
+                assert_se(varlink_sendb(connections[k], "io.test.Rubbish", JSON_BUILD_OBJECT(JSON_BUILD_PAIR("id", JSON_BUILD_INTEGER(k)))) >= 0);
+        }
+
+        /* Then, create one more, which should fail */
+        log_debug("Creating overload connection...");
+        assert_se(varlink_connect_address(&c, address) >= 0);
+        assert_se(varlink_set_description(c, "overload-client") >= 0);
+        assert_se(varlink_attach_event(c, e, k) >= 0);
+        assert_se(varlink_bind_reply(c, overload_reply) >= 0);
+        assert_se(varlink_invokeb(c, "io.test.Overload", JSON_BUILD_OBJECT(JSON_BUILD_PAIR("foo", JSON_BUILD_CONST_STRING("bar")))) >= 0);
+
+        /* Unblock it */
+        log_debug("Unblocking server...");
+        block_write_fd = safe_close(block_write_fd);
+
+        /* This loop will terminate as soon as the overload reply callback is called */
+        assert_se(sd_event_loop(e) >= 0);
+
+        /* And close all connections again */
+        for (k = 0; k < OVERLOAD_CONNECTIONS; k++)
+                connections[k] = varlink_unref(connections[k]);
+}
+
+static void *thread(void *arg) {
+        _cleanup_(varlink_flush_close_unrefp) Varlink *c = NULL;
+        _cleanup_(json_variant_unrefp) JsonVariant *i = NULL, *j = NULL;
+        JsonVariant *o = NULL, *k = NULL;
+        const char *error_id;
+        VarlinkReplyFlags flags = 0;
+        const char *e;
+        int x = 0;
+
+        assert_se(json_build(&i, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("a", JSON_BUILD_INTEGER(88)),
+                                                   JSON_BUILD_PAIR("b", JSON_BUILD_INTEGER(99)))) >= 0);
+
+        assert_se(varlink_connect_address(&c, arg) >= 0);
+        assert_se(varlink_set_description(c, "thread-client") >= 0);
+        assert_se(varlink_set_allow_fd_passing_input(c, true) >= 0);
+        assert_se(varlink_set_allow_fd_passing_output(c, true) >= 0);
+
+        assert_se(varlink_collect(c, "io.test.DoSomethingMore", i, &j, &error_id, &flags) >= 0);
+
+        assert_se(!error_id);
+        assert_se(!flags);
+        assert_se(json_variant_is_array(j) && !json_variant_is_blank_array(j));
+
+        JSON_VARIANT_ARRAY_FOREACH(k, j) {
+                assert_se(json_variant_integer(json_variant_by_key(k, "sum")) == 88 + (99 * x));
+                x++;
+        }
+        assert_se(x == 6);
+
+        assert_se(varlink_call(c, "io.test.DoSomething", i, &o, &e, NULL) >= 0);
+        assert_se(json_variant_integer(json_variant_by_key(o, "sum")) == 88 + 99);
+        assert_se(!e);
+
+        int fd1 = acquire_data_fd("foo", 3, 0);
+        int fd2 = acquire_data_fd("bar", 3, 0);
+        int fd3 = acquire_data_fd("quux", 4, 0);
+
+        assert_se(fd1 >= 0);
+        assert_se(fd2 >= 0);
+        assert_se(fd3 >= 0);
+
+        assert_se(varlink_push_fd(c, fd1) == 0);
+        assert_se(varlink_push_fd(c, fd2) == 1);
+        assert_se(varlink_push_fd(c, fd3) == 2);
+
+        assert_se(varlink_callb(c, "io.test.PassFD", &o, &e, NULL, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("fd", JSON_BUILD_STRING("whoop")))) >= 0);
+
+        int fd4 = varlink_peek_fd(c, 0);
+        int fd5 = varlink_peek_fd(c, 1);
+
+        assert_se(fd4 >= 0);
+        assert_se(fd5 >= 0);
+
+        test_fd(fd4, "miau", 4);
+        test_fd(fd5, "wuff", 4);
+
+        assert_se(varlink_callb(c, "io.test.IDontExist", &o, &e, NULL, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("x", JSON_BUILD_REAL(5.5)))) >= 0);
+        assert_se(streq_ptr(json_variant_string(json_variant_by_key(o, "method")), "io.test.IDontExist"));
+        assert_se(streq(e, VARLINK_ERROR_METHOD_NOT_FOUND));
+
+        flood_test(arg);
+
+        assert_se(varlink_send(c, "io.test.Done", NULL) >= 0);
+
+        return NULL;
+}
+
+static int block_fd_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        char c;
+
+        assert_se(fd_nonblock(fd, false) >= 0);
+
+        assert_se(read(fd, &c, sizeof(c)) == sizeof(c));
+        /* When a character is written to this pipe we'll block until the pipe is closed. */
+
+        assert_se(read(fd, &c, sizeof(c)) == 0);
+
+        assert_se(fd_nonblock(fd, true) >= 0);
+
+        assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
+
+        return 0;
+}
+
+int main(int argc, char *argv[]) {
+        _cleanup_(sd_event_source_unrefp) sd_event_source *block_event = NULL;
+        _cleanup_(varlink_server_unrefp) VarlinkServer *s = NULL;
+        _cleanup_(varlink_flush_close_unrefp) Varlink *c = NULL;
+        _cleanup_(rm_rf_physical_and_freep) char *tmpdir = NULL;
+        _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+        _cleanup_close_pair_ int block_fds[2] = EBADF_PAIR;
+        pthread_t t;
+        const char *sp;
+
+        test_setup_logging(LOG_DEBUG);
+
+        assert_se(mkdtemp_malloc("/tmp/varlink-test-XXXXXX", &tmpdir) >= 0);
+        sp = strjoina(tmpdir, "/socket");
+
+        assert_se(sd_event_default(&e) >= 0);
+
+        assert_se(pipe2(block_fds, O_NONBLOCK|O_CLOEXEC) >= 0);
+        assert_se(sd_event_add_io(e, &block_event, block_fds[0], EPOLLIN, block_fd_handler, NULL) >= 0);
+        assert_se(sd_event_source_set_priority(block_event, SD_EVENT_PRIORITY_IMPORTANT) >= 0);
+        block_write_fd = TAKE_FD(block_fds[1]);
+
+        assert_se(varlink_server_new(&s, VARLINK_SERVER_ACCOUNT_UID) >= 0);
+        assert_se(varlink_server_set_description(s, "our-server") >= 0);
+
+        assert_se(varlink_server_bind_method(s, "io.test.PassFD", method_passfd) >= 0);
+        assert_se(varlink_server_bind_method(s, "io.test.DoSomething", method_something) >= 0);
+        assert_se(varlink_server_bind_method(s, "io.test.DoSomethingMore", method_something_more) >= 0);
+        assert_se(varlink_server_bind_method(s, "io.test.Done", method_done) >= 0);
+        assert_se(varlink_server_bind_connect(s, on_connect) >= 0);
+        assert_se(varlink_server_listen_address(s, sp, 0600) >= 0);
+        assert_se(varlink_server_attach_event(s, e, 0) >= 0);
+        assert_se(varlink_server_set_connections_max(s, OVERLOAD_CONNECTIONS) >= 0);
+
+        assert_se(json_build(&v, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("a", JSON_BUILD_INTEGER(7)),
+                                                   JSON_BUILD_PAIR("b", JSON_BUILD_INTEGER(22)))) >= 0);
+
+        assert_se(varlink_connect_address(&c, sp) >= 0);
+        assert_se(varlink_set_description(c, "main-client") >= 0);
+        assert_se(varlink_bind_reply(c, reply) >= 0);
+
+        assert_se(varlink_invoke(c, "io.test.DoSomething", v) >= 0);
+
+        assert_se(varlink_attach_event(c, e, 0) >= 0);
+
+        assert_se(pthread_create(&t, NULL, thread, (void*) sp) == 0);
+
+        assert_se(sd_event_loop(e) >= 0);
+
+        assert_se(pthread_join(t, NULL) == 0);
+
+        return 0;
+}