+/*
+ * Copyright (C) 2020 Simon Marchi <simon.marchi@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#include <common/buffer-view.h>
+#include <common/dynamic-buffer.h>
+#include <common/snapshot.h>
+#include <lttng/snapshot-internal.h>
+#include <lttng/snapshot.h>
+
+#include <assert.h>
+#include <stdlib.h>
+
+LTTNG_HIDDEN
+bool lttng_snapshot_output_validate(const struct lttng_snapshot_output *output)
+{
+ bool valid = false;
+ size_t len;
+
+ /*
+ * It is mandatory to have a ctrl_url. If there is only one output
+ * URL (in the net://, net6:// or file:// form), it will be in this
+ * field.
+ */
+ len = lttng_strnlen(output->ctrl_url, sizeof(output->ctrl_url));
+ if (len == 0 || len >= sizeof(output->ctrl_url)) {
+ goto end;
+ }
+
+ len = lttng_strnlen(output->data_url, sizeof(output->data_url));
+ if (len >= sizeof(output->data_url)) {
+ goto end;
+ }
+
+ len = lttng_strnlen(output->name, sizeof(output->name));
+ if (len >= sizeof(output->name)) {
+ goto end;
+ }
+
+ valid = true;
+
+end:
+ return valid;
+}
+
+LTTNG_HIDDEN
+bool lttng_snapshot_output_is_equal(
+ const struct lttng_snapshot_output *a,
+ const struct lttng_snapshot_output *b)
+{
+ bool equal = false;
+
+ assert(a);
+ assert(b);
+
+ if (a->max_size != b->max_size) {
+ goto end;
+ }
+
+ if (strcmp(a->name, b->name) != 0) {
+ goto end;
+ }
+
+ if (strcmp(a->ctrl_url, b->ctrl_url) != 0) {
+ goto end;
+ }
+
+ if (strcmp(a->data_url, b->data_url) != 0) {
+ goto end;
+ }
+
+ equal = true;
+
+end:
+ return equal;
+}
+
+/*
+ * This is essentially the same as `struct lttng_snapshot_output`, but packed.
+ */
+struct lttng_snapshot_output_comm {
+ uint32_t id;
+ uint64_t max_size;
+ char name[LTTNG_NAME_MAX];
+ char ctrl_url[PATH_MAX];
+ char data_url[PATH_MAX];
+} LTTNG_PACKED;
+
+LTTNG_HIDDEN
+int lttng_snapshot_output_serialize(
+ const struct lttng_snapshot_output *output,
+ struct lttng_dynamic_buffer *buf)
+{
+ struct lttng_snapshot_output_comm comm;
+ int ret;
+
+ comm.id = output->id;
+ comm.max_size = output->max_size;
+
+ ret = lttng_strncpy(comm.name, output->name, sizeof(comm.name));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_strncpy(comm.ctrl_url, output->ctrl_url, sizeof(comm.ctrl_url));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_strncpy(comm.data_url, output->data_url, sizeof(comm.data_url));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(buf, &comm, sizeof(comm));
+ if (ret) {
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_snapshot_output_create_from_buffer(
+ const struct lttng_buffer_view *view,
+ struct lttng_snapshot_output **output_p)
+{
+ const struct lttng_snapshot_output_comm *comm;
+ struct lttng_snapshot_output *output = NULL;
+ int ret;
+
+ if (view->size != sizeof(*comm)) {
+ ret = -1;
+ goto end;
+ }
+
+ output = lttng_snapshot_output_create();
+ if (!output) {
+ ret = -1;
+ goto end;
+ }
+
+ comm = (const struct lttng_snapshot_output_comm *) view->data;
+
+ output->id = comm->id;
+ output->max_size = comm->max_size;
+
+ ret = lttng_strncpy(output->name, comm->name, sizeof(output->name));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_strncpy(output->ctrl_url, comm->ctrl_url, sizeof(output->ctrl_url));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_strncpy(output->data_url, comm->data_url, sizeof(output->data_url));
+ if (ret) {
+ goto end;
+ }
+
+ *output_p = output;
+ output = NULL;
+ ret = sizeof(*comm);
+
+end:
+ lttng_snapshot_output_destroy(output);
+ return ret;
+}