1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2015 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 #ifdef __FreeBSD__ 33 #include <net/if_var.h> 34 #endif 35 #include <net/route.h> /* for RTM_ADD et all */ 36 #include <netinet/in.h> 37 #ifdef BSD 38 #include <netinet/in_var.h> /* for IN_IFF_TENTATIVE et all */ 39 #endif 40 41 /* Some systems have route metrics. 42 * OpenBSD route priority is not this. */ 43 #ifndef HAVE_ROUTE_METRIC 44 # if defined(__linux__) 45 # define HAVE_ROUTE_METRIC 1 46 # endif 47 #endif 48 49 /* Some systems have in-built IPv4 DAD. 50 * However, we need them to do DAD at carrier up as well. */ 51 #ifdef IN_IFF_TENTATIVE 52 # ifdef __NetBSD__ 53 # define NOCARRIER_PRESERVE_IP 54 # endif 55 #endif 56 57 #include "config.h" 58 #include "dhcpcd.h" 59 #include "ipv4.h" 60 #include "ipv6.h" 61 62 #define EUI64_ADDR_LEN 8 63 #define INFINIBAND_ADDR_LEN 20 64 65 /* Linux 2.4 doesn't define this */ 66 #ifndef ARPHRD_IEEE1394 67 # define ARPHRD_IEEE1394 24 68 #endif 69 70 /* The BSD's don't define this yet */ 71 #ifndef ARPHRD_INFINIBAND 72 # define ARPHRD_INFINIBAND 32 73 #endif 74 75 /* Work out if we have a private address or not 76 * 10/8 77 * 172.16/12 78 * 192.168/16 79 */ 80 #ifndef IN_PRIVATE 81 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \ 82 ((addr & 0xfff00000) == 0xac100000) || \ 83 ((addr & IN_CLASSB_NET) == 0xc0a80000)) 84 #endif 85 86 #define LINKLOCAL_ADDR 0xa9fe0000 87 #define LINKLOCAL_MASK IN_CLASSB_NET 88 #define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK) 89 90 #ifndef IN_LINKLOCAL 91 # define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR) 92 #endif 93 94 #define RAW_EOF 1 << 0 95 #define RAW_PARTIALCSUM 2 << 0 96 97 int if_setflag(struct interface *ifp, short flag); 98 #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING)) 99 struct if_head *if_discover(struct dhcpcd_ctx *, int, char * const *); 100 struct interface *if_find(struct if_head *, const char *); 101 struct interface *if_findindex(struct if_head *, unsigned int); 102 void if_sortinterfaces(struct dhcpcd_ctx *); 103 void if_free(struct interface *); 104 int if_domtu(const char *, short int); 105 #define if_getmtu(iface) if_domtu(iface, 0) 106 #define if_setmtu(iface, mtu) if_domtu(iface, mtu) 107 int if_carrier(struct interface *); 108 int split_interface_lease(const char *ifname, int *ifname_len, 109 const char **lease_identifier); 110 111 /* The below functions are provided by if-KERNEL.c */ 112 int if_conf(struct interface *); 113 int if_init(struct interface *); 114 int if_getssid(struct interface *); 115 int if_vimaster(const char *); 116 int if_openlinksocket(void); 117 int if_managelink(struct dhcpcd_ctx *); 118 119 /* dhcpcd uses the same routing flags as BSD. 120 * If the platform doesn't use these flags, 121 * map them in the platform interace file. */ 122 #ifndef RTM_ADD 123 #define RTM_ADD 0x1 /* Add Route */ 124 #define RTM_DELETE 0x2 /* Delete Route */ 125 #define RTM_CHANGE 0x3 /* Change Metrics or flags */ 126 #define RTM_GET 0x4 /* Report Metrics */ 127 #endif 128 129 #ifdef INET 130 extern const char *if_pfname; 131 int if_openrawsocket(struct interface *, uint16_t); 132 ssize_t if_sendrawpacket(const struct interface *, 133 uint16_t, const void *, size_t, const uint8_t *dest_hw_addr); 134 ssize_t if_readrawpacket(struct interface *, uint16_t, void *, size_t, int *); 135 136 int if_address(const struct interface *, 137 const struct in_addr *, const struct in_addr *, 138 const struct in_addr *, int); 139 #define if_addaddress(ifp, addr, net, brd) \ 140 if_address(ifp, addr, net, brd, 1) 141 #define if_deladdress(ifp, addr, net) \ 142 if_address(ifp, addr, net, NULL, -1) 143 144 int if_addrflags(const struct in_addr *, const struct interface *); 145 146 int if_route(unsigned char, const struct rt *rt); 147 int if_initrt(struct interface *); 148 #endif 149 150 #ifdef INET6 151 int if_checkipv6(struct dhcpcd_ctx *ctx, const struct interface *, int); 152 #ifdef IPV6_MANAGETEMPADDR 153 int ip6_use_tempaddr(const char *ifname); 154 int ip6_temp_preferred_lifetime(const char *ifname); 155 int ip6_temp_valid_lifetime(const char *ifname); 156 #else 157 #define ip6_use_tempaddr(a) (0) 158 #endif 159 160 int if_address6(const struct ipv6_addr *, int); 161 #define if_addaddress6(a) if_address6(a, 1) 162 #define if_deladdress6(a) if_address6(a, -1) 163 164 int if_addrflags6(const struct in6_addr *, const struct interface *); 165 int if_getlifetime6(struct ipv6_addr *); 166 167 int if_route6(unsigned char, const struct rt6 *rt); 168 int if_initrt6(struct interface *); 169 #else 170 #define if_checkipv6(a, b, c) (-1) 171 #endif 172 173 int if_machinearch(char *, size_t); 174 #endif 175