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path: root/src/libsystemd/sd-bus/bus-message.c
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Diffstat (limited to 'src/libsystemd/sd-bus/bus-message.c')
-rw-r--r--src/libsystemd/sd-bus/bus-message.c149
1 files changed, 100 insertions, 49 deletions
diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c
index 18685be8ff..72e2b9f785 100644
--- a/src/libsystemd/sd-bus/bus-message.c
+++ b/src/libsystemd/sd-bus/bus-message.c
@@ -113,8 +113,7 @@ static void message_reset_containers(sd_bus_message *m) {
free(m->containers[i].offsets);
}
- free(m->containers);
- m->containers = NULL;
+ m->containers = mfree(m->containers);
m->n_containers = m->containers_allocated = 0;
m->root_container.index = 0;
@@ -144,11 +143,7 @@ static void message_free(sd_bus_message *m) {
if (m->iovec != m->iovec_fixed)
free(m->iovec);
- if (m->destination_ptr) {
- free(m->destination_ptr);
- m->destination_ptr = NULL;
- }
-
+ m->destination_ptr = mfree(m->destination_ptr);
message_reset_containers(m);
free(m->root_container.signature);
free(m->root_container.offsets);
@@ -608,8 +603,8 @@ static sd_bus_message *message_new(sd_bus *bus, uint8_t type) {
m->header = (struct bus_header*) ((uint8_t*) m + ALIGN(sizeof(struct sd_bus_message)));
m->header->endian = BUS_NATIVE_ENDIAN;
m->header->type = type;
- m->header->version = bus ? bus->message_version : 1;
- m->allow_fds = !bus || bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING);
+ m->header->version = bus->message_version;
+ m->allow_fds = bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING);
m->root_container.need_offsets = BUS_MESSAGE_IS_GVARIANT(m);
m->bus = sd_bus_ref(bus);
@@ -1028,7 +1023,9 @@ _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) {
_public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) {
assert_return(m, NULL);
- assert_return(sd_bus_error_is_set(&m->error), NULL);
+
+ if (!sd_bus_error_is_set(&m->error))
+ return NULL;
return &m->error;
}
@@ -2209,7 +2206,14 @@ static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c,
assert(!c->need_offsets || i == c->n_offsets);
assert(c->need_offsets || n_variable == 0);
- if (n_variable <= 0) {
+ if (isempty(c->signature)) {
+ /* The unary type is encoded as fixed 1 byte padding */
+ a = message_extend_body(m, 1, 1, add_offset, false);
+ if (!a)
+ return -ENOMEM;
+
+ *a = 0;
+ } else if (n_variable <= 0) {
int alignment = 1;
/* Structures with fixed-size members only have to be
@@ -2680,7 +2684,7 @@ _public_ int sd_bus_message_append_array_memfd(
int r;
assert_return(m, -EINVAL);
- assert_return(memfd >= 0, -EINVAL);
+ assert_return(memfd >= 0, -EBADF);
assert_return(bus_type_is_trivial(type), -EINVAL);
assert_return(size > 0, -EINVAL);
assert_return(!m->sealed, -EPERM);
@@ -2756,7 +2760,7 @@ _public_ int sd_bus_message_append_string_memfd(
int r;
assert_return(m, -EINVAL);
- assert_return(memfd >= 0, -EINVAL);
+ assert_return(memfd >= 0, -EBADF);
assert_return(size > 0, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(!m->poisoned, -ESTALE);
@@ -2899,18 +2903,20 @@ static int bus_message_close_header(sd_bus_message *m) {
signature = strempty(m->root_container.signature);
l = strlen(signature);
- sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l, 1);
- d = message_extend_body(m, 1, 1 + l + sz, false, true);
+ sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l + 2, 1);
+ d = message_extend_body(m, 1, 1 + l + 2 + sz, false, true);
if (!d)
return -ENOMEM;
*(uint8_t*) d = 0;
- memcpy((uint8_t*) d + 1, signature, l);
+ *((uint8_t*) d + 1) = SD_BUS_TYPE_STRUCT_BEGIN;
+ memcpy((uint8_t*) d + 2, signature, l);
+ *((uint8_t*) d + 1 + l + 1) = SD_BUS_TYPE_STRUCT_END;
- bus_gvariant_write_word_le((uint8_t*) d + 1 + l, sz, sizeof(struct bus_header) + m->fields_size);
+ bus_gvariant_write_word_le((uint8_t*) d + 1 + l + 2, sz, sizeof(struct bus_header) + m->fields_size);
m->footer = d;
- m->footer_accessible = 1 + l + sz;
+ m->footer_accessible = 1 + l + 2 + sz;
} else {
m->header->dbus1.fields_size = m->fields_size;
m->header->dbus1.body_size = m->body_size;
@@ -3814,6 +3820,14 @@ static int build_struct_offsets(
assert(n_offsets);
if (isempty(signature)) {
+ /* Unary type is encoded as *fixed* 1 byte padding */
+ r = message_peek_body(m, &m->rindex, 1, 1, &q);
+ if (r < 0)
+ return r;
+
+ if (*(uint8_t *) q != 0)
+ return -EBADMSG;
+
*item_size = 0;
*offsets = NULL;
*n_offsets = 0;
@@ -3954,12 +3968,6 @@ static int enter_struct_or_dict_entry(
if (r < 0)
return r;
- } else if (c->item_size <= 0) {
-
- /* gvariant empty struct */
- *item_size = 0;
- *offsets = NULL;
- *n_offsets = 0;
} else
/* gvariant with contents */
return build_struct_offsets(m, contents, c->item_size, item_size, offsets, n_offsets);
@@ -4146,7 +4154,14 @@ _public_ int sd_bus_message_enter_container(sd_bus_message *m,
w->before = before;
w->begin = m->rindex;
- w->end = m->rindex + c->item_size;
+
+ /* Unary type has fixed size of 1, but virtual size of 0 */
+ if (BUS_MESSAGE_IS_GVARIANT(m) &&
+ type == SD_BUS_TYPE_STRUCT &&
+ isempty(signature))
+ w->end = m->rindex + 0;
+ else
+ w->end = m->rindex + c->item_size;
w->array_size = array_size;
w->item_size = item_size;
@@ -4756,7 +4771,6 @@ _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) {
r = sd_bus_message_skip(m, s);
if (r < 0)
return r;
- assert(r != 0);
r = sd_bus_message_exit_container(m);
if (r < 0)
@@ -5164,11 +5178,21 @@ int bus_message_parse_fields(sd_bus_message *m) {
return -EBADMSG;
if (*p == 0) {
+ size_t l;
char *c;
- /* We found the beginning of the signature string, yay! */
+ /* We found the beginning of the signature
+ * string, yay! We require the body to be a
+ * structure, so verify it and then strip the
+ * opening/closing brackets. */
+
+ l = ((char*) m->footer + m->footer_accessible) - p - (1 + sz);
+ if (l < 2 ||
+ p[1] != SD_BUS_TYPE_STRUCT_BEGIN ||
+ p[1 + l - 1] != SD_BUS_TYPE_STRUCT_END)
+ return -EBADMSG;
- c = strndup(p + 1, ((char*) m->footer + m->footer_accessible) - p - (1 + sz));
+ c = strndup(p + 1 + 1, l - 2);
if (!c)
return -ENOMEM;
@@ -5589,21 +5613,23 @@ _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) {
return 1;
}
-int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str, char ***strv) {
- const char *contents;
+static int bus_message_get_arg_skip(
+ sd_bus_message *m,
+ unsigned i,
+ char *_type,
+ 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 r;
for (j = 0;; j++) {
+ const char *contents;
+ char type;
+
r = sd_bus_message_peek_type(m, &type, &contents);
if (r < 0)
return r;
@@ -5615,31 +5641,56 @@ int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str, char **
!(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g")))
return -ENXIO;
- if (j >= i)
- break;
+ if (j >= i) {
+ if (_contents)
+ *_contents = contents;
+ if (_type)
+ *_type = type;
+ return 0;
+ }
r = sd_bus_message_skip(m, NULL);
if (r < 0)
return r;
}
- if (type == SD_BUS_TYPE_ARRAY) {
+}
- r = sd_bus_message_read_strv(m, strv);
- if (r < 0)
- return r;
+int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str) {
+ char type;
+ int r;
- *str = NULL;
+ assert(m);
+ assert(str);
- } else {
- r = sd_bus_message_read_basic(m, type, str);
- if (r < 0)
- return r;
+ r = bus_message_get_arg_skip(m, i, &type, NULL);
+ if (r < 0)
+ return r;
- *strv = NULL;
- }
+ if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE))
+ return -ENXIO;
- return 0;
+ return sd_bus_message_read_basic(m, type, str);
+}
+
+int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv) {
+ const char *contents;
+ char type;
+ int r;
+
+ assert(m);
+ assert(strv);
+
+ r = bus_message_get_arg_skip(m, i, &type, &contents);
+ if (r < 0)
+ return r;
+
+ if (type != SD_BUS_TYPE_ARRAY)
+ return -ENXIO;
+ if (!STR_IN_SET(contents, "s", "o", "g"))
+ return -ENXIO;
+
+ return sd_bus_message_read_strv(m, strv);
}
_public_ int sd_bus_message_get_errno(sd_bus_message *m) {
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-23 13:09:22 +0000