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sd-bus: add support for matches against arrays of strings in messages

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This commit is contained in:
Lennart Poettering 2014-11-28 19:16:37 +01:00
parent d9fba53316
commit 198b158f49
4 changed files with 106 additions and 36 deletions
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67
src/libsystemd/sd-bus/bus-match.c
View File

@ -134,6 +134,7 @@ static bool value_node_test(
enum bus_match_node_type parent_type,
uint8_t value_u8,
const char *value_str,
char **value_strv,
sd_bus_message *m) {
assert(node);
@ -179,17 +180,46 @@ static bool value_node_test(
case BUS_MATCH_INTERFACE:
case BUS_MATCH_MEMBER:
case BUS_MATCH_PATH:
case BUS_MATCH_ARG ... BUS_MATCH_ARG_LAST:
return streq_ptr(node->value.str, value_str);
case BUS_MATCH_ARG ... BUS_MATCH_ARG_LAST: {
char **i;
case BUS_MATCH_ARG_NAMESPACE ... BUS_MATCH_ARG_NAMESPACE_LAST:
return namespace_simple_pattern(node->value.str, value_str);
if (value_str)
return streq_ptr(node->value.str, value_str);
STRV_FOREACH(i, value_strv)
if (streq_ptr(node->value.str, *i))
return true;
return false;
}
case BUS_MATCH_ARG_NAMESPACE ... BUS_MATCH_ARG_NAMESPACE_LAST: {
char **i;
if (value_str)
return namespace_simple_pattern(node->value.str, value_str);
STRV_FOREACH(i, value_strv)
if (namespace_simple_pattern(node->value.str, *i))
return true;
return false;
}
case BUS_MATCH_PATH_NAMESPACE:
return path_simple_pattern(node->value.str, value_str);
case BUS_MATCH_ARG_PATH ... BUS_MATCH_ARG_PATH_LAST:
return path_complex_pattern(node->value.str, value_str);
case BUS_MATCH_ARG_PATH ... BUS_MATCH_ARG_PATH_LAST: {
char **i;
if (value_str)
return path_complex_pattern(node->value.str, value_str);
STRV_FOREACH(i, value_strv)
if (path_complex_pattern(node->value.str, *i))
return true;
return false;
}
default:
assert_not_reached("Invalid node type");
@ -235,7 +265,7 @@ int bus_match_run(
struct bus_match_node *node,
sd_bus_message *m) {
_cleanup_strv_free_ char **test_strv = NULL;
const char *test_str = NULL;
uint8_t test_u8 = 0;
int r;
@ -343,15 +373,15 @@ int bus_match_run(
break;
case BUS_MATCH_ARG ... BUS_MATCH_ARG_LAST:
test_str = bus_message_get_arg(m, node->type - BUS_MATCH_ARG);
(void) bus_message_get_arg(m, node->type - BUS_MATCH_ARG, &test_str, &test_strv);
break;
case BUS_MATCH_ARG_PATH ... BUS_MATCH_ARG_PATH_LAST:
test_str = bus_message_get_arg(m, node->type - BUS_MATCH_ARG_PATH);
(void) bus_message_get_arg(m, node->type - BUS_MATCH_ARG_PATH, &test_str, &test_strv);
break;
case BUS_MATCH_ARG_NAMESPACE ... BUS_MATCH_ARG_NAMESPACE_LAST:
test_str = bus_message_get_arg(m, node->type - BUS_MATCH_ARG_NAMESPACE);
(void) bus_message_get_arg(m, node->type - BUS_MATCH_ARG_NAMESPACE, &test_str, &test_strv);
break;
default:
@ -365,7 +395,20 @@ int bus_match_run(
if (test_str)
found = hashmap_get(node->compare.children, test_str);
else if (node->type == BUS_MATCH_MESSAGE_TYPE)
else if (test_strv) {
char **i;
STRV_FOREACH(i, test_strv) {
found = hashmap_get(node->compare.children, *i);
if (found) {
r = bus_match_run(bus, found, m);
if (r != 0)
return r;
}
}
found = NULL;
} else if (node->type == BUS_MATCH_MESSAGE_TYPE)
found = hashmap_get(node->compare.children, UINT_TO_PTR(test_u8));
else
found = NULL;
@ -381,7 +424,7 @@ int bus_match_run(
/* No hash table, so let's iterate manually... */
for (c = node->child; c; c = c->next) {
if (!value_node_test(c, node->type, test_u8, test_str, m))
if (!value_node_test(c, node->type, test_u8, test_str, test_strv, m))
continue;
r = bus_match_run(bus, c, m);

54
src/libsystemd/sd-bus/bus-message.c
View File

@ -5333,35 +5333,57 @@ _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) {
return 1;
}
const char* bus_message_get_arg(sd_bus_message *m, unsigned i) {
int r;
const char *t = NULL;
int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str, char ***strv) {
const char *contents;
unsigned j;
char type;
int r;
assert(m);
assert(str);
assert(strv);
r = sd_bus_message_rewind(m, true);
if (r < 0)
return NULL;
return r;
for (j = 0; j <= i; j++) {
char type;
r = sd_bus_message_peek_type(m, &type, NULL);
for (j = 0;; j++) {
r = sd_bus_message_peek_type(m, &type, &contents);
if (r < 0)
return NULL;
return r;
if (r == 0)
return -ENXIO;
if (type != SD_BUS_TYPE_STRING &&
type != SD_BUS_TYPE_OBJECT_PATH &&
type != SD_BUS_TYPE_SIGNATURE)
return NULL;
/* Don't match against arguments after the first one we don't understand */
if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE) &&
!(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g")))
return -ENXIO;
r = sd_bus_message_read_basic(m, type, &t);
if (j >= i)
break;
r = sd_bus_message_skip(m, NULL);
if (r < 0)
return NULL;
return r;
}
return t;
if (type == SD_BUS_TYPE_ARRAY) {
r = sd_bus_message_read_strv(m, strv);
if (r < 0)
return r;
*str = NULL;
} else {
r = sd_bus_message_read_basic(m, type, str);
if (r < 0)
return r;
*strv = NULL;
}
return 0;
}
bool bus_header_is_complete(struct bus_header *h, size_t size) {

2
src/libsystemd/sd-bus/bus-message.h
View File

@ -223,7 +223,7 @@ int bus_message_from_malloc(
const char *label,
sd_bus_message **ret);
const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str, char ***strv);
int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);

19
src/libsystemd/sd-bus/test-bus-match.c
View File

@ -33,8 +33,9 @@
static bool mask[32];
static int filter(sd_bus *b, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
log_info("Ran %i", PTR_TO_INT(userdata));
mask[PTR_TO_INT(userdata)] = true;
log_info("Ran %u", PTR_TO_UINT(userdata));
assert(PTR_TO_UINT(userdata) < ELEMENTSOF(mask));
mask[PTR_TO_UINT(userdata)] = true;
return 0;
}
@ -85,9 +86,9 @@ int main(int argc, char *argv[]) {
};
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
_cleanup_bus_unref_ sd_bus *bus = NULL;
_cleanup_bus_close_unref_ sd_bus *bus = NULL;
enum bus_match_node_type i;
sd_bus_slot slots[15];
sd_bus_slot slots[19];
int r;
r = sd_bus_open_system(&bus);
@ -108,16 +109,20 @@ int main(int argc, char *argv[]) {
assert_se(match_add(slots, &root, "arg1='two'", 12) >= 0);
assert_se(match_add(slots, &root, "member='waldo',arg2path='/prefix/'", 13) >= 0);
assert_se(match_add(slots, &root, "member=waldo,path='/foo/bar',arg3namespace='prefix'", 14) >= 0);
assert_se(match_add(slots, &root, "arg4='pi'", 15) >= 0);
assert_se(match_add(slots, &root, "arg4='pa'", 16) >= 0);
assert_se(match_add(slots, &root, "arg4='po'", 17) >= 0);
assert_se(match_add(slots, &root, "arg4='pu'", 18) >= 0);
bus_match_dump(&root, 0);
assert_se(sd_bus_message_new_signal(bus, &m, "/foo/bar", "bar.x", "waldo") >= 0);
assert_se(sd_bus_message_append(m, "ssss", "one", "two", "/prefix/three", "prefix.four") >= 0);
assert_se(sd_bus_message_append(m, "ssssas", "one", "two", "/prefix/three", "prefix.four", 3, "pi", "pa", "po") >= 0);
assert_se(bus_message_seal(m, 1, 0) >= 0);
zero(mask);
assert_se(bus_match_run(NULL, &root, m) == 0);
assert_se(mask_contains((unsigned[]) { 9, 8, 7, 5, 10, 12, 13, 14 }, 8));
assert_se(mask_contains((unsigned[]) { 9, 8, 7, 5, 10, 12, 13, 14, 15, 16, 17 }, 11));
assert_se(bus_match_remove(&root, &slots[8].match_callback) >= 0);
assert_se(bus_match_remove(&root, &slots[13].match_callback) >= 0);
@ -126,7 +131,7 @@ int main(int argc, char *argv[]) {
zero(mask);
assert_se(bus_match_run(NULL, &root, m) == 0);
assert_se(mask_contains((unsigned[]) { 9, 5, 10, 12, 14, 7 }, 6));
assert_se(mask_contains((unsigned[]) { 9, 5, 10, 12, 14, 7, 15, 16, 17 }, 9));
for (i = 0; i < _BUS_MATCH_NODE_TYPE_MAX; i++) {
char buf[32];