1/* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2010 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 45#ifndef DUID_LEN 46# define DUID_LEN 128 + 2 47#endif 48 49#define EUI64_ADDR_LEN 8 50#define INFINIBAND_ADDR_LEN 20 51 52/* Linux 2.4 doesn't define this */ 53#ifndef ARPHRD_IEEE1394 54# define ARPHRD_IEEE1394 24 55#endif 56 57/* The BSD's don't define this yet */ 58#ifndef ARPHRD_INFINIBAND 59# define ARPHRD_INFINIBAND 32 60#endif 61 62 63/* Work out if we have a private address or not 64 * 10/8 65 * 172.16/12 66 * 192.168/16 67 */ 68#ifndef IN_PRIVATE 69# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \ 70 ((addr & 0xfff00000) == 0xac100000) || \ 71 ((addr & IN_CLASSB_NET) == 0xc0a80000)) 72#endif 73 74#define LINKLOCAL_ADDR 0xa9fe0000 75#define LINKLOCAL_MASK IN_CLASSB_NET 76#define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK) 77 78#ifndef IN_LINKLOCAL 79# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR) 80#endif 81 82struct rt { 83 struct in_addr dest; 84 struct in_addr net; 85 struct in_addr gate; 86 const struct interface *iface; 87 struct rt *next; 88}; 89 90extern int socket_afnet; 91 92uint32_t get_netmask(uint32_t); 93char *hwaddr_ntoa(const unsigned char *, size_t); 94size_t hwaddr_aton(unsigned char *, const char *); 95 96int getifssid(const char *, char *); 97struct interface *init_interface(const char *); 98struct interface *discover_interfaces(int, char * const *); 99void free_interface(struct interface *); 100int do_mtu(const char *, short int); 101#define get_mtu(iface) do_mtu(iface, 0) 102#define set_mtu(iface, mtu) do_mtu(iface, mtu) 103 104int inet_ntocidr(struct in_addr); 105int inet_cidrtoaddr(int, struct in_addr *); 106 107int up_interface(struct interface *); 108int if_conf(struct interface *); 109int if_init(struct interface *); 110 111int do_address(const char *, 112 struct in_addr *, struct in_addr *, struct in_addr *, int); 113int if_address(const struct interface *, 114 const struct in_addr *, const struct in_addr *, 115 const struct in_addr *, int); 116#define add_address(iface, addr, net, brd) \ 117 if_address(iface, addr, net, brd, 1) 118#define del_address(iface, addr, net) \ 119 if_address(iface, addr, net, NULL, -1) 120#define has_address(iface, addr, net) \ 121 do_address(iface, addr, net, NULL, 0) 122#define get_address(iface, addr, net, dst) \ 123 do_address(iface, addr, net, dst, 1) 124 125int if_route(const struct interface *, const struct in_addr *, 126 const struct in_addr *, const struct in_addr *, int, int); 127#define add_route(iface, dest, mask, gate, metric) \ 128 if_route(iface, dest, mask, gate, metric, 1) 129#define change_route(iface, dest, mask, gate, metric) \ 130 if_route(iface, dest, mask, gate, metric, 0) 131#define del_route(iface, dest, mask, gate, metric) \ 132 if_route(iface, dest, mask, gate, metric, -1) 133#define del_src_route(iface, dest, mask, gate, metric) \ 134 if_route(iface, dest, mask, gate, metric, -2) 135void free_routes(struct rt *); 136 137int open_udp_socket(struct interface *); 138extern const size_t udp_dhcp_len; 139ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t, 140 struct in_addr, struct in_addr); 141ssize_t get_udp_data(const uint8_t **, const uint8_t *); 142int valid_udp_packet(const uint8_t *, size_t, struct in_addr *); 143 144int open_socket(struct interface *, int); 145ssize_t send_packet(const struct interface *, struct in_addr, 146 const uint8_t *, ssize_t); 147ssize_t send_raw_packet(const struct interface *, int, 148 const void *, ssize_t); 149ssize_t get_raw_packet(struct interface *, int, void *, ssize_t); 150 151int init_sockets(void); 152int open_link_socket(void); 153int manage_link(int); 154int carrier_status(struct interface *); 155#endif 156