1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * dhcpcd - DHCP client daemon 4 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name> 5 * All rights reserved 6 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef INTERFACE_H 30 #define INTERFACE_H 31 32 #include <net/if.h> 33 #include <net/route.h> /* for RTM_ADD et all */ 34 #include <netinet/in.h> 35 #ifdef BSD 36 #include <netinet/in_var.h> /* for IN_IFF_TENTATIVE et all */ 37 #endif 38 39 #include <ifaddrs.h> 40 41 /* Some systems have in-built IPv4 DAD. 42 * However, we need them to do DAD at carrier up as well. */ 43 #ifdef IN_IFF_TENTATIVE 44 # ifdef __NetBSD__ 45 # define NOCARRIER_PRESERVE_IP 46 # endif 47 #endif 48 49 /* 50 * Systems which handle 1 address per alias. 51 * Currenly this is just Solaris. 52 * While Linux can do aliased addresses, it is only useful for their 53 * legacy ifconfig(8) tool which cannot display >1 IPv4 address 54 * (it can display many IPv6 addresses which makes the limitation odd). 55 * Linux has ip(8) which is a more feature rich tool, without the above 56 * restriction. 57 */ 58 #ifndef ALIAS_ADDR 59 # ifdef __sun 60 # define ALIAS_ADDR 61 # endif 62 #endif 63 64 #include "config.h" 65 #include "dhcpcd.h" 66 #include "ipv4.h" 67 #include "ipv6.h" 68 #include "ipv6nd.h" 69 #include "route.h" 70 71 #define EUI64_ADDR_LEN 8 72 #define INFINIBAND_ADDR_LEN 20 73 74 /* Linux 2.4 doesn't define this */ 75 #ifndef ARPHRD_IEEE1394 76 # define ARPHRD_IEEE1394 24 77 #endif 78 79 /* The BSD's don't define this yet */ 80 #ifndef ARPHRD_INFINIBAND 81 # define ARPHRD_INFINIBAND 32 82 #endif 83 84 /* Work out if we have a private address or not 85 * 10/8 86 * 172.16/12 87 * 192.168/16 88 */ 89 #ifndef IN_PRIVATE 90 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \ 91 ((addr & 0xfff00000) == 0xac100000) || \ 92 ((addr & IN_CLASSB_NET) == 0xc0a80000)) 93 #endif 94 95 #ifndef CLLADDR 96 #ifdef AF_LINK 97 # define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen) 98 #endif 99 #endif 100 101 #ifdef __sun 102 /* Solaris stupidly defines this for compat with BSD 103 * but then ignores it. */ 104 #undef RTF_CLONING 105 106 /* Solaris getifaddrs is very un-suitable for dhcpcd. 107 * See if-sun.c for details why. */ 108 struct ifaddrs; 109 int if_getifaddrs(struct ifaddrs **); 110 #define getifaddrs if_getifaddrs 111 int if_getsubnet(struct dhcpcd_ctx *, const char *, int, void *, size_t); 112 #endif 113 114 int if_getflags(struct interface *ifp); 115 int if_setflag(struct interface *ifp, short flag); 116 #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING)) 117 bool if_valid_hwaddr(const uint8_t *, size_t); 118 struct if_head *if_discover(struct dhcpcd_ctx *, struct ifaddrs **, 119 int, char * const *); 120 void if_markaddrsstale(struct if_head *); 121 void if_learnaddrs(struct dhcpcd_ctx *, struct if_head *, struct ifaddrs **); 122 void if_deletestaleaddrs(struct if_head *); 123 struct interface *if_find(struct if_head *, const char *); 124 struct interface *if_findindex(struct if_head *, unsigned int); 125 struct interface *if_loopback(struct dhcpcd_ctx *); 126 void if_free(struct interface *); 127 int if_domtu(const struct interface *, short int); 128 #define if_getmtu(ifp) if_domtu((ifp), 0) 129 #define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu)) 130 int if_carrier(struct interface *); 131 132 #ifdef ALIAS_ADDR 133 int if_makealias(char *, size_t, const char *, int); 134 #endif 135 136 int if_mtu_os(const struct interface *); 137 138 /* 139 * Helper to decode an interface name of bge0:1 to 140 * devname = bge0, drvname = bge0, ppa = 0, lun = 1. 141 * If ppa or lun are invalid they are set to -1. 142 */ 143 struct if_spec { 144 char ifname[IF_NAMESIZE]; 145 char devname[IF_NAMESIZE]; 146 char drvname[IF_NAMESIZE]; 147 int ppa; 148 int lun; 149 }; 150 int if_nametospec(const char *, struct if_spec *); 151 152 /* The below functions are provided by if-KERNEL.c */ 153 int if_conf(struct interface *); 154 int if_init(struct interface *); 155 int if_getssid(struct interface *); 156 bool if_ignore(struct dhcpcd_ctx *, const char *); 157 int if_vimaster(const struct dhcpcd_ctx *ctx, const char *); 158 unsigned short if_vlanid(const struct interface *); 159 int if_opensockets(struct dhcpcd_ctx *); 160 int if_opensockets_os(struct dhcpcd_ctx *); 161 void if_closesockets(struct dhcpcd_ctx *); 162 void if_closesockets_os(struct dhcpcd_ctx *); 163 int if_handlelink(struct dhcpcd_ctx *); 164 165 /* dhcpcd uses the same routing flags as BSD. 166 * If the platform doesn't use these flags, 167 * map them in the platform interace file. */ 168 #ifndef RTM_ADD 169 #define RTM_ADD 0x1 /* Add Route */ 170 #define RTM_DELETE 0x2 /* Delete Route */ 171 #define RTM_CHANGE 0x3 /* Change Metrics or flags */ 172 #define RTM_GET 0x4 /* Report Metrics */ 173 #endif 174 175 /* Define SOCK_CLOEXEC and SOCK_NONBLOCK for systems that lack it. 176 * xsocket() in if.c will map them to fctnl FD_CLOEXEC and O_NONBLOCK. */ 177 #ifdef SOCK_CLOEXEC 178 # define HAVE_SOCK_CLOEXEC 179 #else 180 # define SOCK_CLOEXEC 0x10000000 181 #endif 182 #ifdef SOCK_NONBLOCK 183 # define HAVE_SOCK_NONBLOCK 184 #else 185 # define SOCK_NONBLOCK 0x20000000 186 #endif 187 188 int if_route(unsigned char, const struct rt *rt); 189 int if_initrt(struct dhcpcd_ctx *, rb_tree_t *, int); 190 191 #ifdef INET 192 int if_address(unsigned char, const struct ipv4_addr *); 193 int if_addrflags(const struct interface *, const struct in_addr *, 194 const char *); 195 196 #endif 197 198 #ifdef INET6 199 void if_disable_rtadv(void); 200 void if_setup_inet6(const struct interface *); 201 #ifdef IPV6_MANAGETEMPADDR 202 int ip6_use_tempaddr(const char *ifname); 203 int ip6_temp_preferred_lifetime(const char *ifname); 204 int ip6_temp_valid_lifetime(const char *ifname); 205 #else 206 #define ip6_use_tempaddr(a) (0) 207 #endif 208 int ip6_forwarding(const char *ifname); 209 210 int if_applyra(const struct ra *); 211 int if_address6(unsigned char, const struct ipv6_addr *); 212 int if_addrflags6(const struct interface *, const struct in6_addr *, 213 const char *); 214 int if_getlifetime6(struct ipv6_addr *); 215 216 #else 217 #define if_checkipv6(a, b, c) (-1) 218 #endif 219 220 int if_machinearch(char *, size_t); 221 struct interface *if_findifpfromcmsg(struct dhcpcd_ctx *, 222 struct msghdr *, int *); 223 int xsocket(int, int, int); 224 #endif 225