return 0;
}
-int bus_message_from_malloc(void *buffer, size_t length, sd_bus_message **ret) {
+int bus_message_from_malloc(
+ void *buffer,
+ size_t length,
+ struct ucred *ucred,
+ const char *label,
+ sd_bus_message **ret) {
+
sd_bus_message *m;
struct bus_header *h;
- size_t total, fs, bs;
+ size_t total, fs, bs, label_sz, a;
int r;
assert(buffer || length <= 0);
if (length != total)
return -EBADMSG;
- m = new0(sd_bus_message, 1);
+ if (label) {
+ label_sz = strlen(label);
+ a = ALIGN(sizeof(sd_bus_message)) + label_sz + 1;
+ } else
+ a = sizeof(sd_bus_message);
+
+ m = malloc0(a);
if (!m)
return -ENOMEM;
m->body = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN_TO(fs, 8);
m->sealed = true;
+ if (ucred) {
+ m->uid = ucred->uid;
+ m->pid = ucred->pid;
+ m->gid = ucred->gid;
+ m->uid_valid = m->gid_valid = true;
+ }
+
+ if (label) {
+ m->label = (char*) m + ALIGN(sizeof(sd_bus_message));
+ memcpy(m->label, label, label_sz + 1);
+ }
+
m->n_iovec = 1;
m->iovec[0].iov_base = buffer;
m->iovec[0].iov_len = length;
return 0;
}
+const char *sd_bus_message_get_label(sd_bus_message *m) {
+ if (!m)
+ return NULL;
+
+ return m->label;
+}
+
int sd_bus_message_is_signal(sd_bus_message *m, const char *interface, const char *member) {
if (!m)
return -EINVAL;
if (!contents)
return -EINVAL;
+ /*
+ * We enforce a global limit on container depth, that is much
+ * higher than the 32 structs and 32 arrays the specification
+ * mandates. This is simpler to implement for us, and we need
+ * this only to ensure our container array doesn't grow
+ * without bounds. We are happy to return any data from a
+ * message as long as the data itself is valid, even if the
+ * overall message might be not.
+ *
+ * Note that the message signature is validated when
+ * parsing the headers, and that validation does check the
+ * 32/32 limit.
+ *
+ * Note that the specification defines no limits on the depth
+ * of stacked variants, but we do.
+ */
+ if (m->n_containers >= BUS_CONTAINER_DEPTH)
+ return -EBADMSG;
+
w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1));
if (!w)
return -ENOMEM;