/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Get/set/delete bridge with netlink

 *

 * Authors:	Stephen Hemminger <shemminger@vyatta.com>

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/socket.h>

#include <string.h>

#include <errno.h>

#include "version.h"

#include "utils.h"

#include "br_common.h"

#include "namespace.h"

#include "color.h"

struct rtnl_handle rth = { .fd = -1 };

int preferred_family = AF_UNSPEC;

int oneline;

int show_stats;

int show_details;

static int color;

int compress_vlans;

int json;

int timestamp;

static const char *batch_file;

int force;

static void usage(void) __attribute__((noreturn));

static void usage(void)

{

	fprintf(stderr,

"Usage: bridge [ OPTIONS ] OBJECT { COMMAND | help }\n"

"       bridge [ -force ] -batch filename\n"

"where	OBJECT := { link | fdb | mdb | vlan | monitor }\n"

"	OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |\n"

"		     -o[neline] | -t[imestamp] | -n[etns] name |\n"

"		     -c[ompressvlans] -color -p[retty] -j[son] }\n");

	exit(-1);

}

static int do_help(int argc, char **argv)

{

	usage();

}

static const struct cmd {

	const char *cmd;

	int (*func)(int argc, char **argv);

} cmds[] = {

	{ "link",	do_link },

	{ "fdb",	do_fdb },

	{ "mdb",	do_mdb },

	{ "vlan",	do_vlan },

	{ "monitor",	do_monitor },

	{ "help",	do_help },

	{ 0 }

};

static int do_cmd(const char *argv0, int argc, char **argv)

{

	const struct cmd *c;

	for (c = cmds; c->cmd; ++c) {

		if (matches(argv0, c->cmd) == 0)

			return c->func(argc-1, argv+1);

	}

	fprintf(stderr,

		"Object \"%s\" is unknown, try \"bridge help\".\n", argv0);

	return -1;

}

static int batch(const char *name)

{

	char *line = NULL;

	size_t len = 0;

	int ret = EXIT_SUCCESS;

	if (name && strcmp(name, "-") != 0) {

		if (freopen(name, "r", stdin) == NULL) {

			fprintf(stderr,

				"Cannot open file \"%s\" for reading: %s\n",

				name, strerror(errno));

			return EXIT_FAILURE;

		}

	}

	if (rtnl_open(&rth, 0) < 0) {

		fprintf(stderr, "Cannot open rtnetlink\n");

		return EXIT_FAILURE;

	}

	rtnl_set_strict_dump(&rth);

	cmdlineno = 0;

	while (getcmdline(&line, &len, stdin) != -1) {

		char *largv[100];

		int largc;

		largc = makeargs(line, largv, 100);

		if (largc == 0)

			continue;       /* blank line */

		if (do_cmd(largv[0], largc, largv)) {

			fprintf(stderr, "Command failed %s:%d\n",

				name, cmdlineno);

			ret = EXIT_FAILURE;

			if (!force)

				break;

		}

	}

	if (line)

		free(line);

	rtnl_close(&rth);

	return ret;

}

int

main(int argc, char **argv)

{

	while (argc > 1) {

		const char *opt = argv[1];

		if (strcmp(opt, "--") == 0) {

			argc--; argv++;

			break;

		}

		if (opt[0] != '-')

			break;

		if (opt[1] == '-')

			opt++;

		if (matches(opt, "-help") == 0) {

			usage();

		} else if (matches(opt, "-Version") == 0) {

			printf("bridge utility, 0.0\n");

			exit(0);

		} else if (matches(opt, "-stats") == 0 ||

			   matches(opt, "-statistics") == 0) {

			++show_stats;

		} else if (matches(opt, "-details") == 0) {

			++show_details;

		} else if (matches(opt, "-oneline") == 0) {

			++oneline;

		} else if (matches(opt, "-timestamp") == 0) {

			++timestamp;

		} else if (matches(opt, "-family") == 0) {

			argc--;

			argv++;

			if (argc <= 1)

				usage();

			if (strcmp(argv[1], "inet") == 0)

				preferred_family = AF_INET;

			else if (strcmp(argv[1], "inet6") == 0)

				preferred_family = AF_INET6;

			else if (strcmp(argv[1], "help") == 0)

				usage();

			else

				invarg("invalid protocol family", argv[1]);

		} else if (strcmp(opt, "-4") == 0) {

			preferred_family = AF_INET;

		} else if (strcmp(opt, "-6") == 0) {

			preferred_family = AF_INET6;

		} else if (matches(opt, "-netns") == 0) {

			NEXT_ARG();

			if (netns_switch(argv[1]))

				exit(-1);

		} else if (matches(opt, "-compressvlans") == 0) {

			++compress_vlans;

		} else if (matches_color(opt, &color)) {

		} else if (matches(opt, "-force") == 0) {

			++force;

		} else if (matches(opt, "-json") == 0) {

			++json;

		} else if (matches(opt, "-pretty") == 0) {

			++pretty;

		} else if (matches(opt, "-batch") == 0) {

			argc--;

			argv++;

			if (argc <= 1)

				usage();

			batch_file = argv[1];

		} else {

			fprintf(stderr,

				"Option \"%s\" is unknown, try \"bridge help\".\n",

				opt);

			exit(-1);

		}

		argc--;	argv++;

	}

	_SL_ = oneline ? "\\" : "\n";

	check_enable_color(color, json);

	if (batch_file)

		return batch(batch_file);

	if (rtnl_open(&rth, 0) < 0)

		exit(1);

	rtnl_set_strict_dump(&rth);

	if (argc > 1)

		return do_cmd(argv[1], argc-1, argv+1);

	rtnl_close(&rth);

	usage();

}