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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /tools/testing/selftests/kdbus/test-endpoint.c
Initial import
Diffstat (limited to 'tools/testing/selftests/kdbus/test-endpoint.c')
-rw-r--r--tools/testing/selftests/kdbus/test-endpoint.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/tools/testing/selftests/kdbus/test-endpoint.c b/tools/testing/selftests/kdbus/test-endpoint.c
new file mode 100644
index 000000000..34a7be49c
--- /dev/null
+++ b/tools/testing/selftests/kdbus/test-endpoint.c
@@ -0,0 +1,352 @@
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <errno.h>
+#include <assert.h>
+#include <libgen.h>
+#include <sys/capability.h>
+#include <sys/wait.h>
+#include <stdbool.h>
+
+#include "kdbus-api.h"
+#include "kdbus-util.h"
+#include "kdbus-enum.h"
+#include "kdbus-test.h"
+
+#define KDBUS_SYSNAME_MAX_LEN 63
+
+static int install_name_add_match(struct kdbus_conn *conn, const char *name)
+{
+ struct {
+ struct kdbus_cmd_match cmd;
+ struct {
+ uint64_t size;
+ uint64_t type;
+ struct kdbus_notify_name_change chg;
+ } item;
+ char name[64];
+ } buf;
+ int ret;
+
+ /* install the match rule */
+ memset(&buf, 0, sizeof(buf));
+ buf.item.type = KDBUS_ITEM_NAME_ADD;
+ buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
+ buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
+ strncpy(buf.name, name, sizeof(buf.name) - 1);
+ buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
+ buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
+
+ ret = kdbus_cmd_match_add(conn->fd, &buf.cmd);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int create_endpoint(const char *buspath, uid_t uid, const char *name,
+ uint64_t flags)
+{
+ struct {
+ struct kdbus_cmd cmd;
+
+ /* name item */
+ struct {
+ uint64_t size;
+ uint64_t type;
+ /* max should be KDBUS_SYSNAME_MAX_LEN */
+ char str[128];
+ } name;
+ } ep_make;
+ int fd, ret;
+
+ fd = open(buspath, O_RDWR);
+ if (fd < 0)
+ return fd;
+
+ memset(&ep_make, 0, sizeof(ep_make));
+
+ snprintf(ep_make.name.str,
+ /* Use the KDBUS_SYSNAME_MAX_LEN or sizeof(str) */
+ KDBUS_SYSNAME_MAX_LEN > strlen(name) ?
+ KDBUS_SYSNAME_MAX_LEN : sizeof(ep_make.name.str),
+ "%u-%s", uid, name);
+
+ ep_make.name.type = KDBUS_ITEM_MAKE_NAME;
+ ep_make.name.size = KDBUS_ITEM_HEADER_SIZE +
+ strlen(ep_make.name.str) + 1;
+
+ ep_make.cmd.flags = flags;
+ ep_make.cmd.size = sizeof(ep_make.cmd) + ep_make.name.size;
+
+ ret = kdbus_cmd_endpoint_make(fd, &ep_make.cmd);
+ if (ret < 0) {
+ kdbus_printf("error creating endpoint: %d (%m)\n", ret);
+ return ret;
+ }
+
+ return fd;
+}
+
+static int unpriv_test_custom_ep(const char *buspath)
+{
+ int ret, ep_fd1, ep_fd2;
+ char *ep1, *ep2, *tmp1, *tmp2;
+
+ tmp1 = strdup(buspath);
+ tmp2 = strdup(buspath);
+ ASSERT_RETURN(tmp1 && tmp2);
+
+ ret = asprintf(&ep1, "%s/%u-%s", dirname(tmp1), getuid(), "apps1");
+ ASSERT_RETURN(ret >= 0);
+
+ ret = asprintf(&ep2, "%s/%u-%s", dirname(tmp2), getuid(), "apps2");
+ ASSERT_RETURN(ret >= 0);
+
+ free(tmp1);
+ free(tmp2);
+
+ /* endpoint only accessible to current uid */
+ ep_fd1 = create_endpoint(buspath, getuid(), "apps1", 0);
+ ASSERT_RETURN(ep_fd1 >= 0);
+
+ /* endpoint world accessible */
+ ep_fd2 = create_endpoint(buspath, getuid(), "apps2",
+ KDBUS_MAKE_ACCESS_WORLD);
+ ASSERT_RETURN(ep_fd2 >= 0);
+
+ ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
+ int ep_fd;
+ struct kdbus_conn *ep_conn;
+
+ /*
+ * Make sure that we are not able to create custom
+ * endpoints
+ */
+ ep_fd = create_endpoint(buspath, getuid(),
+ "unpriv_costum_ep", 0);
+ ASSERT_EXIT(ep_fd == -EPERM);
+
+ /*
+ * Endpoint "apps1" only accessible to same users,
+ * that own the endpoint. Access denied by VFS
+ */
+ ep_conn = kdbus_hello(ep1, 0, NULL, 0);
+ ASSERT_EXIT(!ep_conn && errno == EACCES);
+
+ /* Endpoint "apps2" world accessible */
+ ep_conn = kdbus_hello(ep2, 0, NULL, 0);
+ ASSERT_EXIT(ep_conn);
+
+ kdbus_conn_free(ep_conn);
+
+ _exit(EXIT_SUCCESS);
+ }),
+ ({ 0; }));
+ ASSERT_RETURN(ret == 0);
+
+ close(ep_fd1);
+ close(ep_fd2);
+ free(ep1);
+ free(ep2);
+
+ return 0;
+}
+
+static int update_endpoint(int fd, const char *name)
+{
+ int len = strlen(name) + 1;
+ struct {
+ struct kdbus_cmd cmd;
+
+ /* name item */
+ struct {
+ uint64_t size;
+ uint64_t type;
+ char str[KDBUS_ALIGN8(len)];
+ } name;
+
+ struct {
+ uint64_t size;
+ uint64_t type;
+ struct kdbus_policy_access access;
+ } access;
+ } ep_update;
+ int ret;
+
+ memset(&ep_update, 0, sizeof(ep_update));
+
+ ep_update.name.size = KDBUS_ITEM_HEADER_SIZE + len;
+ ep_update.name.type = KDBUS_ITEM_NAME;
+ strncpy(ep_update.name.str, name, sizeof(ep_update.name.str) - 1);
+
+ ep_update.access.size = sizeof(ep_update.access);
+ ep_update.access.type = KDBUS_ITEM_POLICY_ACCESS;
+ ep_update.access.access.type = KDBUS_POLICY_ACCESS_WORLD;
+ ep_update.access.access.access = KDBUS_POLICY_SEE;
+
+ ep_update.cmd.size = sizeof(ep_update);
+
+ ret = kdbus_cmd_endpoint_update(fd, &ep_update.cmd);
+ if (ret < 0) {
+ kdbus_printf("error updating endpoint: %d (%m)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int kdbus_test_custom_endpoint(struct kdbus_test_env *env)
+{
+ char *ep, *tmp;
+ int ret, ep_fd;
+ struct kdbus_msg *msg;
+ struct kdbus_conn *ep_conn;
+ struct kdbus_conn *reader;
+ const char *name = "foo.bar.baz";
+ const char *epname = "foo";
+ char fake_ep[KDBUS_SYSNAME_MAX_LEN + 1] = {'\0'};
+
+ memset(fake_ep, 'X', sizeof(fake_ep) - 1);
+
+ /* Try to create a custom endpoint with a long name */
+ ret = create_endpoint(env->buspath, getuid(), fake_ep, 0);
+ ASSERT_RETURN(ret == -ENAMETOOLONG);
+
+ /* Try to create a custom endpoint with a different uid */
+ ret = create_endpoint(env->buspath, getuid() + 1, "foobar", 0);
+ ASSERT_RETURN(ret == -EINVAL);
+
+ /* create a custom endpoint, and open a connection on it */
+ ep_fd = create_endpoint(env->buspath, getuid(), "foo", 0);
+ ASSERT_RETURN(ep_fd >= 0);
+
+ tmp = strdup(env->buspath);
+ ASSERT_RETURN(tmp);
+
+ ret = asprintf(&ep, "%s/%u-%s", dirname(tmp), getuid(), epname);
+ free(tmp);
+ ASSERT_RETURN(ret >= 0);
+
+ /* Register a connection that listen to broadcasts */
+ reader = kdbus_hello(ep, 0, NULL, 0);
+ ASSERT_RETURN(reader);
+
+ /* Register to kernel signals */
+ ret = kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD,
+ KDBUS_MATCH_ID_ANY);
+ ASSERT_RETURN(ret == 0);
+
+ ret = kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE,
+ KDBUS_MATCH_ID_ANY);
+ ASSERT_RETURN(ret == 0);
+
+ ret = install_name_add_match(reader, name);
+ ASSERT_RETURN(ret == 0);
+
+ /* Monitor connections are not supported on custom endpoints */
+ ep_conn = kdbus_hello(ep, KDBUS_HELLO_MONITOR, NULL, 0);
+ ASSERT_RETURN(!ep_conn && errno == EOPNOTSUPP);
+
+ ep_conn = kdbus_hello(ep, 0, NULL, 0);
+ ASSERT_RETURN(ep_conn);
+
+ /* Check that the reader got the IdAdd notification */
+ ret = kdbus_msg_recv(reader, &msg, NULL);
+ ASSERT_RETURN(ret == 0);
+ ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_ADD);
+ ASSERT_RETURN(msg->items[0].id_change.id == ep_conn->id);
+ kdbus_msg_free(msg);
+
+ /*
+ * Add a name add match on the endpoint connection, acquire name from
+ * the unfiltered connection, and make sure the filtered connection
+ * did not get the notification on the name owner change. Also, the
+ * endpoint connection may not be able to call conn_info, neither on
+ * the name nor on the ID.
+ */
+ ret = install_name_add_match(ep_conn, name);
+ ASSERT_RETURN(ret == 0);
+
+ ret = kdbus_name_acquire(env->conn, name, NULL);
+ ASSERT_RETURN(ret == 0);
+
+ ret = kdbus_msg_recv(ep_conn, NULL, NULL);
+ ASSERT_RETURN(ret == -EAGAIN);
+
+ ret = kdbus_conn_info(ep_conn, 0, name, 0, NULL);
+ ASSERT_RETURN(ret == -ESRCH);
+
+ ret = kdbus_conn_info(ep_conn, 0, "random.crappy.name", 0, NULL);
+ ASSERT_RETURN(ret == -ESRCH);
+
+ ret = kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL);
+ ASSERT_RETURN(ret == -ENXIO);
+
+ ret = kdbus_conn_info(ep_conn, 0x0fffffffffffffffULL, NULL, 0, NULL);
+ ASSERT_RETURN(ret == -ENXIO);
+
+ /* Check that the reader did not receive the name notification */
+ ret = kdbus_msg_recv(reader, NULL, NULL);
+ ASSERT_RETURN(ret == -EAGAIN);
+
+ /*
+ * Release the name again, update the custom endpoint policy,
+ * and try again. This time, the connection on the custom endpoint
+ * should have gotten it.
+ */
+ ret = kdbus_name_release(env->conn, name);
+ ASSERT_RETURN(ret == 0);
+
+ /* Check that the reader did not receive the name notification */
+ ret = kdbus_msg_recv(reader, NULL, NULL);
+ ASSERT_RETURN(ret == -EAGAIN);
+
+ ret = update_endpoint(ep_fd, name);
+ ASSERT_RETURN(ret == 0);
+
+ ret = kdbus_name_acquire(env->conn, name, NULL);
+ ASSERT_RETURN(ret == 0);
+
+ ret = kdbus_msg_recv(ep_conn, &msg, NULL);
+ ASSERT_RETURN(ret == 0);
+ ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_ADD);
+ ASSERT_RETURN(msg->items[0].name_change.old_id.id == 0);
+ ASSERT_RETURN(msg->items[0].name_change.new_id.id == env->conn->id);
+ ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
+ kdbus_msg_free(msg);
+
+ ret = kdbus_msg_recv(reader, &msg, NULL);
+ ASSERT_RETURN(ret == 0);
+ ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
+
+ kdbus_msg_free(msg);
+
+ ret = kdbus_conn_info(ep_conn, 0, name, 0, NULL);
+ ASSERT_RETURN(ret == 0);
+
+ ret = kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL);
+ ASSERT_RETURN(ret == 0);
+
+ /* If we have privileges test custom endpoints */
+ ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
+ ASSERT_RETURN(ret >= 0);
+
+ /*
+ * All uids/gids are mapped and we have the necessary caps
+ */
+ if (ret && all_uids_gids_are_mapped()) {
+ ret = unpriv_test_custom_ep(env->buspath);
+ ASSERT_RETURN(ret == 0);
+ }
+
+ kdbus_conn_free(reader);
+ kdbus_conn_free(ep_conn);
+ close(ep_fd);
+
+ return TEST_OK;
+}