+
+/*
+ * cmd_recv_stream_2_11 allocates path_name and channel_name.
+ */
+int cmd_recv_stream_2_11(const struct lttng_buffer_view *payload,
+ char **ret_path_name, char **ret_channel_name,
+ uint64_t *tracefile_size, uint64_t *tracefile_count,
+ uint64_t *trace_archive_id)
+{
+ int ret;
+ struct lttcomm_relayd_add_stream_2_11 header;
+ size_t header_len, received_names_size;
+ struct lttng_buffer_view channel_name_view;
+ struct lttng_buffer_view pathname_view;
+ char *path_name = NULL;
+ char *channel_name = NULL;
+
+ header_len = sizeof(header);
+
+ if (payload->size < header_len) {
+ ERR("Unexpected payload size in \"cmd_recv_stream_2_11\": expected >= %zu bytes, got %zu bytes",
+ header_len, payload->size);
+ ret = -1;
+ goto error;
+ }
+ memcpy(&header, payload->data, header_len);
+
+ header.channel_name_len = be32toh(header.channel_name_len);
+ header.pathname_len = be32toh(header.pathname_len);
+ header.tracefile_size = be64toh(header.tracefile_size);
+ header.tracefile_count = be64toh(header.tracefile_count);
+ header.trace_archive_id = be64toh(header.trace_archive_id);
+
+ received_names_size = header.channel_name_len + header.pathname_len;
+ if (payload->size < header_len + received_names_size) {
+ ERR("Unexpected payload size in \"cmd_recv_stream_2_11\": expected >= %zu bytes, got %zu bytes",
+ header_len + received_names_size, payload->size);
+ ret = -1;
+ goto error;
+ }
+
+ /* Validate length against defined constant. */
+ if (header.channel_name_len > DEFAULT_STREAM_NAME_LEN) {
+ ret = -ENAMETOOLONG;
+ ERR("Channel name too long");
+ goto error;
+ }
+ if (header.pathname_len > LTTNG_NAME_MAX) {
+ ret = -ENAMETOOLONG;
+ ERR("Pathname too long");
+ goto error;
+ }
+
+ /* Validate that names are (NULL terminated. */
+ channel_name_view = lttng_buffer_view_from_view(payload, header_len,
+ header.channel_name_len);
+ pathname_view = lttng_buffer_view_from_view(payload,
+ header_len + header.channel_name_len, header.pathname_len);
+
+ if (channel_name_view.data[channel_name_view.size - 1] != '\0') {
+ ERR("cmd_recv_stream_2_11 channel_name is invalid (not NULL terminated)");
+ ret = -1;
+ goto error;
+ }
+
+ if (pathname_view.data[pathname_view.size - 1] != '\0') {
+ ERR("cmd_recv_stream_2_11 patname is invalid (not NULL terminated)");
+ ret = -1;
+ goto error;
+ }
+
+ channel_name = strdup(channel_name_view.data);
+ if (!channel_name) {
+ ret = -errno;
+ PERROR("Channel name allocation");
+ goto error;
+ }
+
+ path_name = create_output_path(pathname_view.data);
+ if (!path_name) {
+ PERROR("Path name allocation");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ *tracefile_size = header.tracefile_size;
+ *tracefile_count = header.tracefile_count;
+ *trace_archive_id = header.trace_archive_id;
+ *ret_path_name = path_name;
+ *ret_channel_name = channel_name;
+ /* Move ownership to caller */
+ path_name = NULL;
+ channel_name = NULL;
+ ret = 0;
+error:
+ free(channel_name);
+ free(path_name);
+ return ret;
+}