libyang-dup-user-type.c

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <err.h>
#include <assert.h>
#include <arpa/inet.h>
#include <stdbool.h>

#include <libyang/libyang.h>

static struct ly_ctx *ly_ctx;

static void validate(struct lyd_node **config)
{
	if (lyd_validate(config, LYD_OPT_CONFIG, ly_ctx) != 0)
		errx(1, "lyd_validate");
}

static void print_addr(struct lyd_node *config, const char *xpath)
{
	struct ly_set *set;
	struct lyd_node_leaf_list *node;
	struct in_addr addr;

	set = lyd_find_path(config, xpath);
	assert(set);
	node = (struct lyd_node_leaf_list *)set->set.d[0];

	printf("address (from value_str): %s\n", node->value_str);

	memcpy(&addr, node->value.ptr, sizeof(addr));
	printf("address (from value.ptr): %s\n", inet_ntoa(addr));
}

int main(int argc, char **argv)
{
	const struct lys_module *module;
	struct lyd_node *config1 = NULL, *config2;
	struct lyd_node *node;
	const char *xpath_neighbor = "/frr-ripd:ripd/instance/explicit-neighbor[.='1.1.1.1']";

	putenv("LIBYANG_USER_TYPES_PLUGINS_DIR=/usr/local/lib/frr/yang");

	/* initialization */
	ly_ctx = ly_ctx_new(NULL, 0);
	if (!ly_ctx)
		errx(1, "ly_ctx_new");

	ly_ctx_set_searchdir(ly_ctx, "/usr/local/share/yang/");
	module = lys_parse_path(ly_ctx, "/usr/local/share/yang/frr-ripd.yang",
				LYS_IN_YANG);
	if (!module)
		errx(1, "lys_parse_path");

	validate(&config1);

	printf("===========================================\n");
	printf("config1:\n");
	printf("===========================================\n");

	ly_errno = 0;
	node = lyd_new_path(config1, ly_ctx, xpath_neighbor, NULL, 0,
			    LYD_PATH_OPT_UPDATE);
	if (node == NULL && ly_errno)
		errx(1, "lyd_new_path");

	print_addr(config1, xpath_neighbor);

	printf("===========================================\n");
	printf("config2 (copy from config1):\n");
	printf("===========================================\n");

	config2 = lyd_dup_withsiblings(config1, 1);
	if (config2 == NULL)
		errx(1, "lyd_dup_withsiblings");
	lyd_free_withsiblings(config1);

	print_addr(config2, xpath_neighbor);

	/* cleanup */
	lyd_free_withsiblings(config2);
	ly_ctx_remove_module(module, NULL);
	ly_ctx_destroy(ly_ctx, NULL);

	return 0;
}