1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2010 Roy Marples <roy (at) 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 82 struct 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 90 extern int socket_afnet; 91 92 uint32_t get_netmask(uint32_t); 93 char *hwaddr_ntoa(const unsigned char *, size_t); 94 size_t hwaddr_aton(unsigned char *, const char *); 95 96 int getifssid(const char *, char *); 97 struct interface *init_interface(const char *); 98 struct interface *discover_interfaces(int, char * const *); 99 void free_interface(struct interface *); 100 int 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) 103 104 int inet_ntocidr(struct in_addr); 105 int inet_cidrtoaddr(int, struct in_addr *); 106 107 int up_interface(struct interface *); 108 int if_conf(struct interface *); 109 int if_init(struct interface *); 110 111 int do_address(const char *, 112 struct in_addr *, struct in_addr *, struct in_addr *, int); 113 int 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) 124 125 int 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) 135 void free_routes(struct rt *); 136 137 int open_udp_socket(struct interface *); 138 extern const size_t udp_dhcp_len; 139 ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t, 140 struct in_addr, struct in_addr); 141 ssize_t get_udp_data(const uint8_t **, const uint8_t *); 142 int valid_udp_packet(const uint8_t *, size_t, struct in_addr *); 143 144 int open_socket(struct interface *, int); 145 ssize_t send_packet(const struct interface *, struct in_addr, 146 const uint8_t *, ssize_t); 147 ssize_t send_raw_packet(const struct interface *, int, 148 const void *, ssize_t); 149 ssize_t get_raw_packet(struct interface *, int, void *, ssize_t); 150 151 int init_sockets(void); 152 int open_link_socket(void); 153 int manage_link(int); 154 int carrier_status(struct interface *); 155 #endif 156
