1/* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2011 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 <sys/types.h> 32#include <sys/param.h> 33#include <sys/socket.h> 34 35#include <net/if.h> 36#include <netinet/in.h> 37#include <netinet/if_ether.h> 38 39#include <limits.h> 40 41#include "config.h" 42#include "dhcp.h" 43#include "dhcpcd.h" 44#include "ipv6.h" 45 46/* Some systems have route metrics */ 47#ifndef HAVE_ROUTE_METRIC 48# ifdef __linux__ 49# define HAVE_ROUTE_METRIC 1 50# endif 51# ifndef HAVE_ROUTE_METRIC 52# define HAVE_ROUTE_METRIC 0 53# endif 54#endif 55 56#ifndef DUID_LEN 57# define DUID_LEN 128 + 2 58#endif 59 60#define EUI64_ADDR_LEN 8 61#define INFINIBAND_ADDR_LEN 20 62 63/* Linux 2.4 doesn't define this */ 64#ifndef ARPHRD_IEEE1394 65# define ARPHRD_IEEE1394 24 66#endif 67 68/* The BSD's don't define this yet */ 69#ifndef ARPHRD_INFINIBAND 70# define ARPHRD_INFINIBAND 32 71#endif 72 73/* Work out if we have a private address or not 74 * 10/8 75 * 172.16/12 76 * 192.168/16 77 */ 78#ifndef IN_PRIVATE 79# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \ 80 ((addr & 0xfff00000) == 0xac100000) || \ 81 ((addr & IN_CLASSB_NET) == 0xc0a80000)) 82#endif 83 84#define LINKLOCAL_ADDR 0xa9fe0000 85#define LINKLOCAL_MASK IN_CLASSB_NET 86#define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK) 87 88#ifndef IN_LINKLOCAL 89# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR) 90#endif 91 92struct rt { 93 struct in_addr dest; 94 struct in_addr net; 95 struct in_addr gate; 96 const struct interface *iface; 97 int metric; 98 struct in_addr src; 99 struct rt *next; 100}; 101 102extern int socket_afnet; 103 104uint32_t get_netmask(uint32_t); 105char *hwaddr_ntoa(const unsigned char *, size_t); 106size_t hwaddr_aton(unsigned char *, const char *); 107 108int getifssid(const char *, char *); 109struct interface *discover_interfaces(int, char * const *); 110void free_interface(struct interface *); 111int do_mtu(const char *, short int); 112#define get_mtu(iface) do_mtu(iface, 0) 113#define set_mtu(iface, mtu) do_mtu(iface, mtu) 114 115int inet_ntocidr(struct in_addr); 116int inet_cidrtoaddr(int, struct in_addr *); 117 118int up_interface(struct interface *); 119int if_conf(struct interface *); 120int if_init(struct interface *); 121 122int do_address(const char *, 123 struct in_addr *, struct in_addr *, struct in_addr *, int); 124int if_address(const struct interface *, 125 const struct in_addr *, const struct in_addr *, 126 const struct in_addr *, int); 127#define add_address(iface, addr, net, brd) \ 128 if_address(iface, addr, net, brd, 1) 129#define del_address(iface, addr, net) \ 130 if_address(iface, addr, net, NULL, -1) 131#define has_address(iface, addr, net) \ 132 do_address(iface, addr, net, NULL, 0) 133#define get_address(iface, addr, net, dst) \ 134 do_address(iface, addr, net, dst, 1) 135 136int if_route(const struct rt *rt, int); 137#define add_route(rt) if_route(rt, 1) 138#define change_route(rt) if_route(rt, 0) 139#define del_route(rt) if_route(rt, -1) 140#define del_src_route(rt) if_route(rt, -2); 141void free_routes(struct rt *); 142 143int if_address6(const struct interface *, const struct ipv6_addr *, int); 144#define add_address6(ifp, a) if_address6(ifp, a, 1) 145#define del_address6(ifp, a) if_address6(ifp, a, -1) 146 147int if_route6(const struct rt6 *rt, int); 148#define add_route6(rt) if_route6(rt, 1) 149#define change_route6(rt) if_route6(rt, 0) 150#define del_route6(rt) if_route6(rt, -1) 151#define del_src_route6(rt) if_route6(rt, -2); 152 153int open_udp_socket(struct interface *); 154extern const size_t udp_dhcp_len; 155ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t, 156 struct in_addr, struct in_addr); 157ssize_t get_udp_data(const uint8_t **, const uint8_t *); 158int valid_udp_packet(const uint8_t *, size_t, struct in_addr *, int); 159 160int open_socket(struct interface *, int); 161ssize_t send_packet(const struct interface *, struct in_addr, 162 const uint8_t *, ssize_t); 163ssize_t send_raw_packet(const struct interface *, int, 164 const void *, ssize_t); 165ssize_t get_raw_packet(struct interface *, int, void *, ssize_t, int *); 166 167int init_sockets(void); 168int open_link_socket(void); 169int manage_link(int); 170int carrier_status(struct interface *); 171#endif 172