/* SPDX-License-Identifier: BSD-2-Clause */ /* * dhcpcd - DHCP client daemon * Copyright (c) 2006-2019 Roy Marples * 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 #include /* for RTM_ADD et all */ #include #ifdef BSD #include /* for IN_IFF_TENTATIVE et all */ #endif #include /* 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" #include "dhcpcd.h" #include "ipv4.h" #include "ipv6.h" #include "ipv6nd.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_getflags(struct interface *ifp); int if_setflag(struct interface *ifp, short flag); #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING)) 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 *); /* 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); #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 *); #ifdef IPV6_MANAGETEMPADDR int ip6_use_tempaddr(const char *ifname); int ip6_temp_preferred_lifetime(const char *ifname); int ip6_temp_valid_lifetime(const char *ifname); #else #define ip6_use_tempaddr(a) (0) #endif int ip6_forwarding(const char *ifname); 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); #endif