/* 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 INTERFACE_H
#define INTERFACE_H
#include <net/if.h>
#include <net/route.h> /* for RTM_ADD et all */
#include <netinet/in.h>
#ifdef BSD
#include <netinet/in_var.h> /* for IN_IFF_TENTATIVE et all */
#endif
#include <ifaddrs.h>
/* Some systems have in-built IPv4 DAD.
* However, we need them to do DAD at carrier up as well. */
#ifdef IN_IFF_TENTATIVE
# ifdef __NetBSD__
# define NOCARRIER_PRESERVE_IP
# endif
#endif
/*
* Systems which handle 1 address per alias.
* Currenly this is just Solaris.
* While Linux can do aliased addresses, it is only useful for their
* legacy ifconfig(8) tool which cannot display >1 IPv4 address
* (it can display many IPv6 addresses which makes the limitation odd).
* Linux has ip(8) which is a more feature rich tool, without the above
* restriction.
*/
#ifndef ALIAS_ADDR
# ifdef __sun
# define ALIAS_ADDR
# endif
#endif
#include "config.h"
/* POSIX defines ioctl request as an int, which Solaris and musl use.
* Everyone else use an unsigned long, which happens to be the bigger one
* so we use that in our on wire API. */
#ifdef IOCTL_REQUEST_TYPE
typedef IOCTL_REQUEST_TYPE ioctl_request_t;
#else
typedef unsigned long ioctl_request_t;
#endif
#include "dhcpcd.h"
#include "ipv4.h"
#include "ipv6.h"
#include "route.h"
#define EUI64_ADDR_LEN 8
#define INFINIBAND_ADDR_LEN 20
/* Linux 2.4 doesn't define this */
#ifndef ARPHRD_IEEE1394
# define ARPHRD_IEEE1394 24
#endif
/* The BSD's don't define this yet */
#ifndef ARPHRD_INFINIBAND
# define ARPHRD_INFINIBAND 32
#endif
/* Maximum frame length.
* Support jumbo frames and some extra. */
#define FRAMEHDRLEN_MAX 14 /* only ethernet support */
#define FRAMELEN_MAX (FRAMEHDRLEN_MAX + 9216)
/* Work out if we have a private address or not
* 10/8
* 172.16/12
* 192.168/16
*/
#ifndef IN_PRIVATE
# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \
((addr & 0xfff00000) == 0xac100000) || \
((addr & IN_CLASSB_NET) == 0xc0a80000))
#endif
#ifndef CLLADDR
#ifdef AF_LINK
# define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen)
#endif
#endif
#ifdef __sun
/* Solaris stupidly defines this for compat with BSD
* but then ignores it. */
#undef RTF_CLONING
/* Solaris getifaddrs is very un-suitable for dhcpcd.
* See if-sun.c for details why. */
struct ifaddrs;
int if_getifaddrs(struct ifaddrs **);
#define getifaddrs if_getifaddrs
int if_getsubnet(struct dhcpcd_ctx *, const char *, int, void *, size_t);
#endif
int if_ioctl(struct dhcpcd_ctx *, ioctl_request_t, void *, size_t);
int if_getflags(struct interface *);
int if_setflag(struct interface *, short, short);
#define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING), 0)
#define if_down(ifp) if_setflag((ifp), 0, IFF_UP);
bool if_valid_hwaddr(const uint8_t *, size_t);
struct if_head *if_discover(struct dhcpcd_ctx *, struct ifaddrs **,
int, char * const *);
void if_markaddrsstale(struct if_head *);
void if_learnaddrs(struct dhcpcd_ctx *, struct if_head *, struct ifaddrs **);
void if_deletestaleaddrs(struct if_head *);
struct interface *if_find(struct if_head *, const char *);
struct interface *if_findindex(struct if_head *, unsigned int);
struct interface *if_loopback(struct dhcpcd_ctx *);
void if_free(struct interface *);
int if_domtu(const struct interface *, short int);
#define if_getmtu(ifp) if_domtu((ifp), 0)
#define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu))
int if_carrier(struct interface *);
#ifdef ALIAS_ADDR
int if_makealias(char *, size_t, const char *, int);
#endif
int if_mtu_os(const struct interface *);
/*
* Helper to decode an interface name of bge0:1 to
* devname = bge0, drvname = bge0, ppa = 0, lun = 1.
* If ppa or lun are invalid they are set to -1.
*/
struct if_spec {
char ifname[IF_NAMESIZE];
char devname[IF_NAMESIZE];
char drvname[IF_NAMESIZE];
int ppa;
int vlid;
int lun;
};
int if_nametospec(const char *, struct if_spec *);
/* The below functions are provided by if-KERNEL.c */
int if_conf(struct interface *);
int if_init(struct interface *);
int if_getssid(struct interface *);
bool if_ignore(struct dhcpcd_ctx *, const char *);
int if_vimaster(const struct dhcpcd_ctx *ctx, const char *);
unsigned short if_vlanid(const struct interface *);
int if_opensockets(struct dhcpcd_ctx *);
int if_opensockets_os(struct dhcpcd_ctx *);
void if_closesockets(struct dhcpcd_ctx *);
void if_closesockets_os(struct dhcpcd_ctx *);
int if_handlelink(struct dhcpcd_ctx *);
int if_randomisemac(struct interface *);
int if_setmac(struct interface *ifp, void *, uint8_t);
/* dhcpcd uses the same routing flags as BSD.
* If the platform doesn't use these flags,
* map them in the platform interace file. */
#ifndef RTM_ADD
#define RTM_ADD 0x1 /* Add Route */
#define RTM_DELETE 0x2 /* Delete Route */
#define RTM_CHANGE 0x3 /* Change Metrics or flags */
#define RTM_GET 0x4 /* Report Metrics */
#endif
/* Define SOCK_CLOEXEC and SOCK_NONBLOCK for systems that lack it.
* xsocket() in if.c will map them to fctnl FD_CLOEXEC and O_NONBLOCK. */
#ifdef SOCK_CLOEXEC
# define HAVE_SOCK_CLOEXEC
#else
# define SOCK_CLOEXEC 0x10000000
#endif
#ifdef SOCK_NONBLOCK
# define HAVE_SOCK_NONBLOCK
#else
# define SOCK_NONBLOCK 0x20000000
#endif
int if_route(unsigned char, const struct rt *rt);
int if_initrt(struct dhcpcd_ctx *, rb_tree_t *, int);
int if_missfilter(struct interface *, struct sockaddr *);
int if_missfilter_apply(struct dhcpcd_ctx *);
#ifdef INET
int if_address(unsigned char, const struct ipv4_addr *);
int if_addrflags(const struct interface *, const struct in_addr *,
const char *);
#endif
#ifdef INET6
void if_disable_rtadv(void);
void if_setup_inet6(const struct interface *);
int ip6_forwarding(const char *ifname);
struct ra;
struct ipv6_addr;
int if_applyra(const struct ra *);
int if_address6(unsigned char, const struct ipv6_addr *);
int if_addrflags6(const struct interface *, const struct in6_addr *,
const char *);
int if_getlifetime6(struct ipv6_addr *);
#else
#define if_checkipv6(a, b, c) (-1)
#endif
int if_machinearch(char *, size_t);
struct interface *if_findifpfromcmsg(struct dhcpcd_ctx *,
struct msghdr *, int *);
int xsocket(int, int, int);
#ifdef __linux__
int if_linksocket(struct sockaddr_nl *, int);
int if_getnetlink(struct dhcpcd_ctx *, struct iovec *, int, int,
int (*)(struct dhcpcd_ctx *, void *, struct nlmsghdr *), void *);
#endif
#endif
