Differential D22012 Diff 97318 contrib/dhcpcd/src/ipv4.h

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contrib/dhcpcd/src/ipv4.h

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				/* SPDX-License-Identifier: BSD-2-Clause */
				/*
				* dhcpcd - DHCP client daemon
				* Copyright (c) 2006-2019 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;

				/* Buffer for BPF */
				size_t buffer_size, buffer_len, buffer_pos;
				char *buffer;
				};

				#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

				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);
				void 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 */