/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * dhcpcd - DHCP client daemon
 * Copyright (c) 2006-2020 Roy Marples <roy@marples.name>
 * All rights reserved

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef IF_OPTIONS_H
#define IF_OPTIONS_H

#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>

#include <getopt.h>
#include <limits.h>
#include <stdint.h>

#include "auth.h"
#include "route.h"

/* Don't set any optional arguments here so we retain POSIX
 * compatibility with getopt */
#define IF_OPTS "146bc:de:f:gh:i:j:kl:m:no:pqr:s:t:u:v:wxy:z:" \
		"ABC:DEF:GHI:JKLMNO:PQ:S:TUVW:X:Z:"
#define NOERR_IF_OPTS		":" IF_OPTS

#define DEFAULT_TIMEOUT		30
#define DEFAULT_REBOOT		5

#ifndef HOSTNAME_MAX_LEN
#define HOSTNAME_MAX_LEN	250	/* 255 - 3 (FQDN) - 2 (DNS enc) */
#endif
#define VENDORCLASSID_MAX_LEN	255
#define CLIENTID_MAX_LEN	48
#define USERCLASS_MAX_LEN	255
#define VENDOR_MAX_LEN		255
#define	MUDURL_MAX_LEN		255

#define DHCPCD_ARP			(1ULL << 0)
#define DHCPCD_RELEASE			(1ULL << 1)
#define DHCPCD_RTBUILD			(1ULL << 2)
#define DHCPCD_GATEWAY			(1ULL << 3)
#define DHCPCD_STATIC			(1ULL << 4)
#define DHCPCD_DEBUG			(1ULL << 5)
#define DHCPCD_LASTLEASE		(1ULL << 7)
#define DHCPCD_INFORM			(1ULL << 8)
#define DHCPCD_REQUEST			(1ULL << 9)
#define DHCPCD_IPV4LL			(1ULL << 10)
#define DHCPCD_DUID			(1ULL << 11)
#define DHCPCD_PERSISTENT		(1ULL << 12)
#define DHCPCD_DAEMONISE		(1ULL << 14)
#define DHCPCD_DAEMONISED		(1ULL << 15)
#define DHCPCD_TEST			(1ULL << 16)
#define DHCPCD_MASTER			(1ULL << 17)
#define DHCPCD_HOSTNAME			(1ULL << 18)
#define DHCPCD_CLIENTID			(1ULL << 19)
#define DHCPCD_LINK			(1ULL << 20)
#define DHCPCD_ANONYMOUS		(1ULL << 21)
#define DHCPCD_BACKGROUND		(1ULL << 22)
#define DHCPCD_VENDORRAW		(1ULL << 23)
#define DHCPCD_NOWAITIP			(1ULL << 24) /* To force daemonise */
#define DHCPCD_WAITIP			(1ULL << 25)
#define DHCPCD_SLAACPRIVATE		(1ULL << 26)
#define DHCPCD_CSR_WARNED		(1ULL << 27)
#define DHCPCD_XID_HWADDR		(1ULL << 28)
#define DHCPCD_BROADCAST		(1ULL << 29)
#define DHCPCD_DUMPLEASE		(1ULL << 30)
#define DHCPCD_IPV6RS			(1ULL << 31)
#define DHCPCD_IPV6RA_REQRDNSS		(1ULL << 32)
#define DHCPCD_PRIVSEP			(1ULL << 33)
#define DHCPCD_UNPRIV			(1ULL << 34)
#define DHCPCD_IPV4			(1ULL << 35)
#define DHCPCD_FORKED			(1ULL << 36)
#define DHCPCD_IPV6			(1ULL << 37)
#define DHCPCD_STARTED			(1ULL << 38)
#define DHCPCD_NOALIAS			(1ULL << 39)
#define DHCPCD_IA_FORCED		(1ULL << 40)
#define DHCPCD_STOPPING			(1ULL << 41)
#define DHCPCD_DEPARTED			(1ULL << 42)
#define DHCPCD_HOSTNAME_SHORT		(1ULL << 43)
#define DHCPCD_EXITING			(1ULL << 44)
#define DHCPCD_WAITIP4			(1ULL << 45)
#define DHCPCD_WAITIP6			(1ULL << 46)
#define DHCPCD_DEV			(1ULL << 47)
#define DHCPCD_IAID			(1ULL << 48)
#define DHCPCD_DHCP			(1ULL << 49)
#define DHCPCD_DHCP6			(1ULL << 50)
#define DHCPCD_IF_UP			(1ULL << 51)
#define DHCPCD_INFORM6			(1ULL << 52)
#define DHCPCD_WANTDHCP			(1ULL << 53)
#define DHCPCD_IPV6RA_AUTOCONF		(1ULL << 54)
#define DHCPCD_ROUTER_HOST_ROUTE_WARNED	(1ULL << 55)
#define DHCPCD_LASTLEASE_EXTEND		(1ULL << 56)
#define DHCPCD_BOOTP			(1ULL << 57)
#define DHCPCD_INITIAL_DELAY		(1ULL << 58)
#define DHCPCD_PRINT_PIDFILE		(1ULL << 59)
#define DHCPCD_ONESHOT			(1ULL << 60)
#define DHCPCD_INACTIVE			(1ULL << 61)
#define	DHCPCD_SLAACTEMP		(1ULL << 62)
#define DHCPCD_PRIVSEPROOT		(1ULL << 63)

#define DHCPCD_NODROP	(DHCPCD_EXITING | DHCPCD_PERSISTENT)

#define DHCPCD_WAITOPTS	(DHCPCD_WAITIP | DHCPCD_WAITIP4 | DHCPCD_WAITIP6)

#define DHCPCD_WARNINGS	(DHCPCD_CSR_WARNED | \
		DHCPCD_ROUTER_HOST_ROUTE_WARNED)

/* These options only make sense in the config file, so don't use any
   valid short options for them */
#define O_BASE			MAX('z', 'Z') + 1
#define O_ARPING		O_BASE + 1
#define O_FALLBACK		O_BASE + 2
#define O_DESTINATION		O_BASE + 3
#define O_IPV6RS		O_BASE + 4
#define O_NOIPV6RS		O_BASE + 5
#define O_IPV6RA_FORK		O_BASE + 6
#define O_LINK_RCVBUF		O_BASE + 7
#define O_ANONYMOUS		O_BASE + 8
#define O_NOALIAS		O_BASE + 9
#define O_IA_NA			O_BASE + 10
#define O_IA_TA			O_BASE + 11
#define O_IA_PD			O_BASE + 12
#define O_HOSTNAME_SHORT	O_BASE + 13
#define O_DEV			O_BASE + 14
#define O_NODEV			O_BASE + 15
#define O_NOIPV4		O_BASE + 16
#define O_NOIPV6		O_BASE + 17
#define O_IAID			O_BASE + 18
#define O_DEFINE		O_BASE + 19
#define O_DEFINE6		O_BASE + 20
#define O_EMBED			O_BASE + 21
#define O_ENCAP			O_BASE + 22
#define O_VENDOPT		O_BASE + 23
#define O_VENDCLASS		O_BASE + 24
#define O_AUTHPROTOCOL		O_BASE + 25
#define O_AUTHTOKEN		O_BASE + 26
#define O_AUTHNOTREQUIRED	O_BASE + 27
#define O_NODHCP		O_BASE + 28
#define O_NODHCP6		O_BASE + 29
#define O_DHCP			O_BASE + 30
#define O_DHCP6			O_BASE + 31
#define O_IPV4			O_BASE + 32
#define O_IPV6			O_BASE + 33
#define O_CONTROLGRP		O_BASE + 34
#define O_SLAAC			O_BASE + 35
#define O_GATEWAY		O_BASE + 36
#define O_NOUP			O_BASE + 37
#define O_IPV6RA_AUTOCONF	O_BASE + 38
#define O_IPV6RA_NOAUTOCONF	O_BASE + 39
#define O_REJECT		O_BASE + 40
#define O_BOOTP			O_BASE + 42
#define O_DEFINEND		O_BASE + 43
#define O_NODELAY		O_BASE + 44
#define O_INFORM6		O_BASE + 45
#define O_LASTLEASE_EXTEND	O_BASE + 46
#define O_INACTIVE		O_BASE + 47
#define O_MUDURL		O_BASE + 48
#define O_MSUSERCLASS		O_BASE + 49

extern const struct option cf_options[];

struct if_sla {
	char ifname[IF_NAMESIZE];
	uint32_t sla;
	uint8_t prefix_len;
	uint64_t suffix;
	bool sla_set;
};

struct if_ia {
	uint8_t iaid[4];
#ifdef INET6
	uint16_t ia_type;
	uint8_t iaid_set;
	struct in6_addr addr;
	uint8_t prefix_len;
#ifndef SMALL
	uint32_t sla_max;
	size_t sla_len;
	struct if_sla *sla;
#endif
#endif
};

struct vivco {
	size_t len;
	uint8_t *data;
};

struct if_options {
	time_t mtime;
	uint8_t iaid[4];
	int metric;
	uint8_t requestmask[256 / NBBY];
	uint8_t requiremask[256 / NBBY];
	uint8_t nomask[256 / NBBY];
	uint8_t rejectmask[256 / NBBY];
	uint8_t dstmask[256 / NBBY];
	uint8_t requestmasknd[(UINT16_MAX + 1) / NBBY];
	uint8_t requiremasknd[(UINT16_MAX + 1) / NBBY];
	uint8_t nomasknd[(UINT16_MAX + 1) / NBBY];
	uint8_t rejectmasknd[(UINT16_MAX + 1) / NBBY];
	uint8_t requestmask6[(UINT16_MAX + 1) / NBBY];
	uint8_t requiremask6[(UINT16_MAX + 1) / NBBY];
	uint8_t nomask6[(UINT16_MAX + 1) / NBBY];
	uint8_t rejectmask6[(UINT16_MAX + 1) / NBBY];
	uint32_t leasetime;
	uint32_t timeout;
	uint32_t reboot;
	unsigned long long options;

	struct in_addr req_addr;
	struct in_addr req_mask;
	struct in_addr req_brd;
	rb_tree_t routes;
	struct in6_addr req_addr6;
	uint8_t req_prefix_len;
	unsigned int mtu;
	char **config;

	char **environ;

	char hostname[HOSTNAME_MAX_LEN + 1]; /* We don't store the length */
	uint8_t fqdn;
	uint8_t vendorclassid[VENDORCLASSID_MAX_LEN + 2];
	uint8_t clientid[CLIENTID_MAX_LEN + 2];
	uint8_t userclass[USERCLASS_MAX_LEN + 2];
	uint8_t vendor[VENDOR_MAX_LEN + 2];
	uint8_t mudurl[MUDURL_MAX_LEN + 2];

	size_t blacklist_len;
	in_addr_t *blacklist;
	size_t whitelist_len;
	in_addr_t *whitelist;
	ssize_t arping_len;
	in_addr_t *arping;
	char *fallback;

	struct if_ia *ia;
	size_t ia_len;

	struct dhcp_opt *dhcp_override;
	size_t dhcp_override_len;
	struct dhcp_opt *nd_override;
	size_t nd_override_len;
	struct dhcp_opt *dhcp6_override;
	size_t dhcp6_override_len;
	uint32_t vivco_en;
	struct vivco *vivco;
	size_t vivco_len;
	struct dhcp_opt *vivso_override;
	size_t vivso_override_len;

	struct auth auth;
};

struct if_options *default_config(struct dhcpcd_ctx *);
struct if_options *read_config(struct dhcpcd_ctx *,
    const char *, const char *, const char *);
int add_options(struct dhcpcd_ctx *, const char *,
    struct if_options *, int, char **);
void free_dhcp_opt_embenc(struct dhcp_opt *);
void free_options(struct dhcpcd_ctx *, struct if_options *);

#endif