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/* 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 IPV4_H
#define IPV4_H
#include "dhcpcd.h"
/* Prefer our macro */
#ifdef HTONL
#undef HTONL
#endif
#ifndef BYTE_ORDER
#define BIG_ENDIAN 1234
#define LITTLE_ENDIAN 4321
#if defined(_BIG_ENDIAN)
#define BYTE_ORDER BIG_ENDIAN
#elif defined(_LITTLE_ENDIAN)
#define BYTE_ORDER LITTLE_ENDIAN
#else
#error Endian unknown
#endif
#endif
#if BYTE_ORDER == BIG_ENDIAN
#define HTONL(A) (A)
#elif BYTE_ORDER == LITTLE_ENDIAN
#define HTONL(A) \
((((uint32_t)(A) & 0xff000000) >> 24) | \
(((uint32_t)(A) & 0x00ff0000) >> 8) | \
(((uint32_t)(A) & 0x0000ff00) << 8) | \
(((uint32_t)(A) & 0x000000ff) << 24))
#endif /* BYTE_ORDER */
#ifdef __sun
/* Solaris lacks these defines.
* While it supports DaD, to seems to only expose IFF_DUPLICATE
* so we have no way of knowing if it's tentative or not.
* I don't even know if Solaris has any special treatment for tentative. */
# define IN_IFF_TENTATIVE 0x01
# define IN_IFF_DUPLICATED 0x02
# define IN_IFF_DETACHED 0x00
#endif
#ifdef IN_IFF_TENTATIVE
#define IN_IFF_NOTUSEABLE \
(IN_IFF_TENTATIVE | IN_IFF_DUPLICATED | IN_IFF_DETACHED)
#endif
#define IN_ARE_ADDR_EQUAL(a, b) ((a)->s_addr == (b)->s_addr)
#define IN_IS_ADDR_UNSPECIFIED(a) ((a)->s_addr == INADDR_ANY)
#ifdef __linux__
#define IP_LIFETIME
#endif
struct ipv4_addr {
TAILQ_ENTRY(ipv4_addr) next;
struct in_addr addr;
struct in_addr mask;
struct in_addr brd;
struct interface *iface;
int addr_flags;
unsigned int flags;
#ifdef IP_LIFETIME
uint32_t vltime;
uint32_t pltime;
#endif
char saddr[INET_ADDRSTRLEN + 3];
#ifdef ALIAS_ADDR
char alias[IF_NAMESIZE];
#endif
};
TAILQ_HEAD(ipv4_addrhead, ipv4_addr);
#define IPV4_AF_STALE (1U << 0)
#define IPV4_AF_NEW (1U << 1)
#define IPV4_ADDR_EQ(a1, a2) ((a1) && (a1)->addr.s_addr == (a2)->addr.s_addr)
#define IPV4_MASK1_EQ(a1, a2) ((a1) && (a1)->mask.s_addr == (a2)->mask.s_addr)
#define IPV4_MASK_EQ(a1, a2) (IPV4_ADDR_EQ(a1, a2) && IPV4_MASK1_EQ(a1, a2))
#define IPV4_BRD1_EQ(a1, a2) ((a1) && (a1)->brd.s_addr == (a2)->brd.s_addr)
#define IPV4_BRD_EQ(a1, a2) (IPV4_MASK_EQ(a1, a2) && IPV4_BRD1_EQ(a1, a2))
struct ipv4_state {
struct ipv4_addrhead addrs;
};
#define IPV4_STATE(ifp) \
((struct ipv4_state *)(ifp)->if_data[IF_DATA_IPV4])
#define IPV4_CSTATE(ifp) \
((const struct ipv4_state *)(ifp)->if_data[IF_DATA_IPV4])
#ifdef INET
struct ipv4_state *ipv4_getstate(struct interface *);
int ipv4_ifcmp(const struct interface *, const struct interface *);
uint8_t inet_ntocidr(struct in_addr);
int inet_cidrtoaddr(int, struct in_addr *);
uint32_t ipv4_getnetmask(uint32_t);
int ipv4_hasaddr(const struct interface *);
bool inet_getroutes(struct dhcpcd_ctx *, rb_tree_t *);
#define STATE_ADDED 0x01
#define STATE_FAKE 0x02
#define STATE_EXPIRED 0x04
int ipv4_deladdr(struct ipv4_addr *, int);
struct ipv4_addr *ipv4_addaddr(struct interface *,
const struct in_addr *, const struct in_addr *, const struct in_addr *,
uint32_t, uint32_t);
struct ipv4_addr *ipv4_applyaddr(void *);
struct ipv4_addr *ipv4_iffindaddr(struct interface *,
const struct in_addr *, const struct in_addr *);
struct ipv4_addr *ipv4_iffindlladdr(struct interface *);
struct ipv4_addr *ipv4_findaddr(struct dhcpcd_ctx *, const struct in_addr *);
struct ipv4_addr *ipv4_findmaskaddr(struct dhcpcd_ctx *,
const struct in_addr *);
void ipv4_markaddrsstale(struct interface *);
void ipv4_deletestaleaddrs(struct interface *);
void ipv4_handleifa(struct dhcpcd_ctx *, int, struct if_head *, const char *,
const struct in_addr *, const struct in_addr *, const struct in_addr *,
int, pid_t);
void ipv4_free(struct interface *);
#endif /* INET */
#endif /* IPV4_H */
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