1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2018 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef INTERFACE_H 29 #define INTERFACE_H 30 31 #include <net/if.h> 32 #include <net/route.h> /* for RTM_ADD et all */ 33 #include <netinet/in.h> 34 #ifdef BSD 35 #include <netinet/in_var.h> /* for IN_IFF_TENTATIVE et all */ 36 #endif 37 38 #include <ifaddrs.h> 39 40 /* Some systems have in-built IPv4 DAD. 41 * However, we need them to do DAD at carrier up as well. */ 42 #ifdef IN_IFF_TENTATIVE 43 # ifdef __NetBSD__ 44 # define NOCARRIER_PRESERVE_IP 45 # endif 46 #endif 47 48 /* 49 * Systems which handle 1 address per alias. 50 * Currenly this is just Solaris. 51 * While Linux can do aliased addresses, it is only useful for their 52 * legacy ifconfig(8) tool which cannot display >1 IPv4 address 53 * (it can display many IPv6 addresses which makes the limitation odd). 54 * Linux has ip(8) which is a more feature rich tool, without the above 55 * restriction. 56 */ 57 #ifndef ALIAS_ADDR 58 # ifdef __sun 59 # define ALIAS_ADDR 60 # endif 61 #endif 62 63 #include "config.h" 64 #include "dhcpcd.h" 65 #include "ipv4.h" 66 #include "ipv6.h" 67 #include "route.h" 68 69 #define EUI64_ADDR_LEN 8 70 #define INFINIBAND_ADDR_LEN 20 71 72 /* Linux 2.4 doesn't define this */ 73 #ifndef ARPHRD_IEEE1394 74 # define ARPHRD_IEEE1394 24 75 #endif 76 77 /* The BSD's don't define this yet */ 78 #ifndef ARPHRD_INFINIBAND 79 # define ARPHRD_INFINIBAND 32 80 #endif 81 82 /* Work out if we have a private address or not 83 * 10/8 84 * 172.16/12 85 * 192.168/16 86 */ 87 #ifndef IN_PRIVATE 88 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \ 89 ((addr & 0xfff00000) == 0xac100000) || \ 90 ((addr & IN_CLASSB_NET) == 0xc0a80000)) 91 #endif 92 93 #define RAW_EOF 1 << 0 94 #define RAW_PARTIALCSUM 2 << 0 95 96 #ifndef CLLADDR 97 #ifdef AF_LINK 98 # define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen) 99 #endif 100 #endif 101 102 #ifdef __sun 103 /* Solaris stupidly defines this for compat with BSD 104 * but then ignores it. */ 105 #undef RTF_CLONING 106 107 /* Solaris getifaddrs is very un-suitable for dhcpcd. 108 * See if-sun.c for details why. */ 109 struct ifaddrs; 110 int if_getifaddrs(struct ifaddrs **); 111 #define getifaddrs if_getifaddrs 112 #endif 113 114 int if_setflag(struct interface *ifp, short flag); 115 #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING)) 116 bool if_valid_hwaddr(const uint8_t *, size_t); 117 struct if_head *if_discover(struct dhcpcd_ctx *, struct ifaddrs **, 118 int, char * const *); 119 void if_markaddrsstale(struct if_head *); 120 void if_learnaddrs(struct dhcpcd_ctx *, struct if_head *, struct ifaddrs **); 121 void if_deletestaleaddrs(struct if_head *); 122 struct interface *if_find(struct if_head *, const char *); 123 struct interface *if_findindex(struct if_head *, unsigned int); 124 struct interface *if_loopback(struct dhcpcd_ctx *); 125 void if_sortinterfaces(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 /* 133 * Helper to decode an interface name of bge0:1 to 134 * devname = bge0, drvname = bge0, ppa = 0, lun = 1. 135 * If ppa or lun are invalid they are set to -1. 136 */ 137 struct if_spec { 138 char ifname[IF_NAMESIZE]; 139 char devname[IF_NAMESIZE]; 140 char drvname[IF_NAMESIZE]; 141 int ppa; 142 int lun; 143 }; 144 int if_nametospec(const char *, struct if_spec *); 145 146 /* The below functions are provided by if-KERNEL.c */ 147 int if_conf(struct interface *); 148 int if_init(struct interface *); 149 int if_getssid(struct interface *); 150 int if_vimaster(const struct dhcpcd_ctx *ctx, const char *); 151 unsigned short if_vlanid(const struct interface *); 152 int if_opensockets(struct dhcpcd_ctx *); 153 int if_opensockets_os(struct dhcpcd_ctx *); 154 void if_closesockets(struct dhcpcd_ctx *); 155 void if_closesockets_os(struct dhcpcd_ctx *); 156 int if_handlelink(struct dhcpcd_ctx *); 157 158 /* dhcpcd uses the same routing flags as BSD. 159 * If the platform doesn't use these flags, 160 * map them in the platform interace file. */ 161 #ifndef RTM_ADD 162 #define RTM_ADD 0x1 /* Add Route */ 163 #define RTM_DELETE 0x2 /* Delete Route */ 164 #define RTM_CHANGE 0x3 /* Change Metrics or flags */ 165 #define RTM_GET 0x4 /* Report Metrics */ 166 #endif 167 168 /* Define SOCK_CLOEXEC and SOCK_NONBLOCK for systems that lack it. 169 * xsocket() in if.c will map them to fctnl FD_CLOEXEC and O_NONBLOCK. */ 170 #ifdef SOCK_CLOEXEC 171 # define HAVE_SOCK_CLOEXEC 172 #else 173 # define SOCK_CLOEXEC 0x10000000 174 #endif 175 #ifdef SOCK_NONBLOCK 176 # define HAVE_SOCK_NONBLOCK 177 #else 178 # define SOCK_NONBLOCK 0x20000000 179 #endif 180 181 int if_route(unsigned char, const struct rt *rt); 182 int if_initrt(struct dhcpcd_ctx *, int); 183 184 #ifdef INET 185 int if_address(unsigned char, const struct ipv4_addr *); 186 int if_addrflags(const struct interface *, const struct in_addr *, 187 const char *); 188 189 #endif 190 191 #ifdef INET6 192 void if_setup_inet6(const struct interface *); 193 #ifdef IPV6_MANAGETEMPADDR 194 int ip6_use_tempaddr(const char *ifname); 195 int ip6_temp_preferred_lifetime(const char *ifname); 196 int ip6_temp_valid_lifetime(const char *ifname); 197 #else 198 #define ip6_use_tempaddr(a) (0) 199 #endif 200 201 int if_address6(unsigned char, const struct ipv6_addr *); 202 int if_addrflags6(const struct interface *, const struct in6_addr *, 203 const char *); 204 int if_getlifetime6(struct ipv6_addr *); 205 206 #else 207 #define if_checkipv6(a, b, c) (-1) 208 #endif 209 210 int if_machinearch(char *, size_t); 211 int xsocket(int, int, int); 212 #endif 213