GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/ldpctl/parser.c Lines: 0 87 0.0 %
Date: 2017-11-13 Branches: 0 78 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: parser.c,v 1.12 2016/05/23 19:06:03 renato Exp $ */
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/*
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 * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
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 * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
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 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netdb.h>
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#include "ldpd.h"
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#include "parser.h"
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enum token_type {
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	NOTOKEN,
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	ENDTOKEN,
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	KEYWORD,
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	FAMILY,
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	ADDRESS,
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	FLAG,
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	IFNAME
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};
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struct token {
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	enum token_type		 type;
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	const char		*keyword;
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	int			 value;
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	const struct token	*next;
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};
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static const struct token t_main[];
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static const struct token t_fib[];
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static const struct token t_show[];
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static const struct token t_show_iface[];
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static const struct token t_show_iface_af[];
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static const struct token t_show_disc[];
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static const struct token t_show_disc_af[];
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static const struct token t_show_nbr[];
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static const struct token t_show_nbr_af[];
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static const struct token t_show_lib[];
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static const struct token t_show_lib_af[];
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static const struct token t_show_fib[];
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static const struct token t_show_fib_af[];
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static const struct token t_show_l2vpn[];
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static const struct token t_clear[];
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static const struct token t_clear_nbr[];
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static const struct token t_log[];
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static const struct token t_main[] = {
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	{KEYWORD,	"reload",	RELOAD,		NULL},
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	{KEYWORD,	"fib",		FIB,		t_fib},
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	{KEYWORD,	"show",		SHOW,		t_show},
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	{KEYWORD,	"clear",	CLEAR_NBR,	t_clear},
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	{KEYWORD,	"log",		NONE,		t_log},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_fib[] = {
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	{ KEYWORD,	"couple",	FIB_COUPLE,	NULL},
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	{ KEYWORD,	"decouple",	FIB_DECOUPLE,	NULL},
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	{ ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{KEYWORD,	"interfaces",	SHOW_IFACE,	t_show_iface},
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	{KEYWORD,	"discovery",	SHOW_DISC,	t_show_disc},
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	{KEYWORD,	"neighbor",	SHOW_NBR,	t_show_nbr},
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	{KEYWORD,	"lib",		SHOW_LIB,	t_show_lib},
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	{KEYWORD,	"fib",		SHOW_FIB,	t_show_fib},
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	{KEYWORD,	"l2vpn",	NONE,		t_show_l2vpn},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_iface[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{KEYWORD,	"family",	NONE,		t_show_iface_af},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_iface_af[] = {
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	{FAMILY,	"",		NONE,		t_show_iface},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_disc[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{KEYWORD,	"family",	NONE,		t_show_disc_af},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_disc_af[] = {
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	{FAMILY,	"",		NONE,		t_show_disc},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_nbr[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{KEYWORD,	"family",	NONE,		t_show_nbr_af},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_nbr_af[] = {
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	{FAMILY,	"",		NONE,		t_show_nbr},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_lib[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{KEYWORD,	"family",	NONE,		t_show_lib_af},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_lib_af[] = {
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	{FAMILY,	"",		NONE,		t_show_lib},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_fib[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{KEYWORD,	"family",	NONE,		t_show_fib_af},
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	{KEYWORD,	"interface",	SHOW_FIB_IFACE,	t_show_iface},
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	{FLAG,		"connected",	F_CONNECTED,	t_show_fib},
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	{FLAG,		"static",	F_STATIC,	t_show_fib},
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	{ADDRESS,	"",		NONE,		NULL},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_fib_af[] = {
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	{FAMILY,	"",		NONE,		t_show_fib},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_show_l2vpn[] = {
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	{KEYWORD,	"bindings",	SHOW_L2VPN_BINDING,	NULL},
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	{KEYWORD,	"pseudowires",	SHOW_L2VPN_PW,		NULL},
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	{ENDTOKEN,	"",		NONE,			NULL}
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};
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static const struct token t_clear[] = {
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	{KEYWORD,	"neighbors",	CLEAR_NBR,	t_clear_nbr},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_clear_nbr[] = {
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	{NOTOKEN,	"",		NONE,		NULL},
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	{ADDRESS,	"",		NONE,		NULL},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token t_log[] = {
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	{KEYWORD,	"verbose",	LOG_VERBOSE,	NULL},
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	{KEYWORD,	"brief",	LOG_BRIEF,	NULL},
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	{ENDTOKEN,	"",		NONE,		NULL}
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};
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static const struct token *match_token(const char *, const struct token *,
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    struct parse_result *);
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static void show_valid_args(const struct token *);
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struct parse_result *
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parse(int argc, char *argv[])
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{
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	static struct parse_result	res;
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	const struct token	*table = t_main;
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	const struct token	*match;
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	memset(&res, 0, sizeof(res));
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	while (argc >= 0) {
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		if ((match = match_token(argv[0], table, &res)) == NULL) {
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			fprintf(stderr, "valid commands/args:\n");
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			show_valid_args(table);
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			return (NULL);
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		}
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		argc--;
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		argv++;
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		if (match->type == NOTOKEN || match->next == NULL)
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			break;
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		table = match->next;
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	}
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	if (argc > 0) {
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		fprintf(stderr, "superfluous argument: %s\n", argv[0]);
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		return (NULL);
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	}
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	return (&res);
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}
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static const struct token *
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match_token(const char *word, const struct token *table,
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    struct parse_result *res)
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{
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	uint			 i, match;
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	const struct token	*t = NULL;
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	match = 0;
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	for (i = 0; table[i].type != ENDTOKEN; i++) {
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		switch (table[i].type) {
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		case NOTOKEN:
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			if (word == NULL || strlen(word) == 0) {
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				match++;
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				t = &table[i];
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			}
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			break;
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		case KEYWORD:
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			if (word != NULL && strncmp(word, table[i].keyword,
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			    strlen(word)) == 0) {
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				match++;
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				t = &table[i];
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				if (t->value)
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					res->action = t->value;
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			}
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			break;
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		case FLAG:
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			if (word != NULL && strncmp(word, table[i].keyword,
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			    strlen(word)) == 0) {
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				match++;
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				t = &table[i];
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				res->flags |= t->value;
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			}
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			break;
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		case FAMILY:
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			if (word == NULL)
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				break;
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			if (!strcmp(word, "inet") ||
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			    !strcasecmp(word, "IPv4")) {
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				match++;
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				t = &table[i];
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				res->family = AF_INET;
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			}
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			if (!strcmp(word, "inet6") ||
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			    !strcasecmp(word, "IPv6")) {
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				match++;
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				t = &table[i];
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				res->family = AF_INET6;
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			}
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			break;
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		case ADDRESS:
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			if (parse_addr(word, &res->family, &res->addr)) {
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				match++;
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				t = &table[i];
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				if (t->value)
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					res->action = t->value;
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			}
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			break;
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		case IFNAME:
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			if (!match && word != NULL && strlen(word) > 0) {
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				if (strlcpy(res->ifname, word,
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				    sizeof(res->ifname)) >=
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				    sizeof(res->ifname))
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					err(1, "interface name too long");
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				match++;
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				t = &table[i];
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				if (t->value)
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					res->action = t->value;
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			}
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			break;
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		case ENDTOKEN:
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			break;
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		}
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	}
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	if (match != 1) {
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		if (word == NULL)
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			fprintf(stderr, "missing argument:\n");
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		else if (match > 1)
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			fprintf(stderr, "ambiguous argument: %s\n", word);
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		else if (match < 1)
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			fprintf(stderr, "unknown argument: %s\n", word);
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		return (NULL);
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	}
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	return (t);
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}
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static void
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show_valid_args(const struct token *table)
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{
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	int	i;
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	for (i = 0; table[i].type != ENDTOKEN; i++) {
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		switch (table[i].type) {
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		case NOTOKEN:
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			fprintf(stderr, "  <cr>\n");
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			break;
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		case KEYWORD:
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		case FLAG:
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			fprintf(stderr, "  %s\n", table[i].keyword);
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			break;
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		case FAMILY:
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			fprintf(stderr, "  [ inet | inet6 | IPv4 | IPv6 ]\n");
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			break;
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		case ADDRESS:
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			fprintf(stderr, "  <address>\n");
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			break;
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		case IFNAME:
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			fprintf(stderr, "  <interface>\n");
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		case ENDTOKEN:
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			break;
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		}
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	}
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}
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int
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parse_addr(const char *word, int *family, union ldpd_addr *addr)
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{
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	struct in_addr		 ina;
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	struct addrinfo		 hints, *r;
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	struct sockaddr_in6	*sa_in6;
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	if (word == NULL)
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		return (0);
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	memset(addr, 0, sizeof(*addr));
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	memset(&ina, 0, sizeof(ina));
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	if (inet_net_pton(AF_INET, word, &ina, sizeof(ina)) != -1) {
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		*family = AF_INET;
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		addr->v4.s_addr = ina.s_addr;
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		return (1);
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	}
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	memset(&hints, 0, sizeof(hints));
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	hints.ai_family = AF_INET6;
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	hints.ai_socktype = SOCK_DGRAM; /*dummy*/
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	hints.ai_flags = AI_NUMERICHOST;
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	if (getaddrinfo(word, "0", &hints, &r) == 0) {
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		sa_in6 = (struct sockaddr_in6 *)r->ai_addr;
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		*family = AF_INET6;
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		addr->v6 = sa_in6->sin6_addr;
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		freeaddrinfo(r);
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		return (1);
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	}
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	return (0);
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}