1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright 2006-2008 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 43 #ifndef DUID_LEN 44 # define DUID_LEN 128 + 2 45 #endif 46 47 #define EUI64_ADDR_LEN 8 48 #define INFINIBAND_ADDR_LEN 20 49 50 /* Linux 2.4 doesn't define this */ 51 #ifndef ARPHRD_IEEE1394 52 # define ARPHRD_IEEE1394 24 53 #endif 54 55 /* The BSD's don't define this yet */ 56 #ifndef ARPHRD_INFINIBAND 57 # define ARPHRD_INFINIBAND 32 58 #endif 59 60 #define HWADDR_LEN 20 61 62 /* Work out if we have a private address or not 63 * 10/8 64 * 172.16/12 65 * 192.168/16 66 */ 67 #ifndef IN_PRIVATE 68 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \ 69 ((addr & 0xfff00000) == 0xac100000) || \ 70 ((addr & IN_CLASSB_NET) == 0xc0a80000)) 71 #endif 72 73 #define LINKLOCAL_ADDR 0xa9fe0000 74 #define LINKLOCAL_MASK IN_CLASSB_NET 75 #define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK) 76 77 #ifndef IN_LINKLOCAL 78 # define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR) 79 #endif 80 81 /* There is an argument that this should be converted to an STAIL using 82 * queue(3). However, that isn't readily available on all libc's that 83 * dhcpcd works on. The only benefit of STAILQ over this is the ability to 84 * quickly loop backwards through the list - currently we reverse the list 85 * and then move through it forwards. This isn't that much of a big deal 86 * though as the norm is to just have one default route, and an IPV4LL route. 87 * You can (and do) get more routes in the DHCP message, but not enough to 88 * really warrant a change to STAIL queue for performance reasons. */ 89 struct rt { 90 struct in_addr dest; 91 struct in_addr net; 92 struct in_addr gate; 93 struct rt *next; 94 }; 95 96 struct interface 97 { 98 char name[IF_NAMESIZE]; 99 sa_family_t family; 100 unsigned char hwaddr[HWADDR_LEN]; 101 size_t hwlen; 102 int arpable; 103 104 int raw_fd; 105 int udp_fd; 106 int arp_fd; 107 int link_fd; 108 size_t buffer_size, buffer_len, buffer_pos; 109 unsigned char *buffer; 110 111 struct in_addr addr; 112 struct in_addr net; 113 struct rt *routes; 114 115 char leasefile[PATH_MAX]; 116 time_t start_uptime; 117 118 unsigned char *clientid; 119 }; 120 121 uint32_t get_netmask(uint32_t); 122 char *hwaddr_ntoa(const unsigned char *, size_t); 123 size_t hwaddr_aton(unsigned char *, const char *); 124 125 struct interface *read_interface(const char *, int); 126 int do_mtu(const char *, short int); 127 #define get_mtu(iface) do_mtu(iface, 0) 128 #define set_mtu(iface, mtu) do_mtu(iface, mtu) 129 130 int inet_ntocidr(struct in_addr); 131 int inet_cidrtoaddr(int, struct in_addr *); 132 133 int up_interface(const char *); 134 int do_interface(const char *, unsigned char *, size_t *, 135 struct in_addr *, struct in_addr *, int); 136 int if_address(const char *, const struct in_addr *, const struct in_addr *, 137 const struct in_addr *, int); 138 #define add_address(ifname, addr, net, brd) \ 139 if_address(ifname, addr, net, brd, 1) 140 #define del_address(ifname, addr, net) \ 141 if_address(ifname, addr, net, NULL, -1) 142 #define has_address(ifname, addr, net) \ 143 do_interface(ifname, NULL, NULL, addr, net, 0) 144 #define get_address(ifname, addr, net) \ 145 do_interface(ifname, NULL, NULL, addr, net, 1) 146 147 int if_route(const struct interface *, 148 const struct in_addr *,const struct in_addr *, 149 const struct in_addr *, int, int); 150 #define add_route(iface, dest, mask, gate, metric) \ 151 if_route(iface, dest, mask, gate, metric, 1) 152 #define change_route(iface, dest, mask, gate, metric) \ 153 if_route(iface, dest, mask, gate, metric, 0) 154 #define del_route(iface, dest, mask, gate, metric) \ 155 if_route(iface, dest, mask, gate, metric, -1) 156 void free_routes(struct rt *); 157 158 int open_udp_socket(struct interface *); 159 const size_t udp_dhcp_len; 160 ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t, 161 struct in_addr, struct in_addr); 162 ssize_t get_udp_data(const uint8_t **, const uint8_t *); 163 int valid_udp_packet(const uint8_t *, size_t); 164 165 int open_socket(struct interface *, int); 166 ssize_t send_packet(const struct interface *, struct in_addr, 167 const uint8_t *, ssize_t); 168 ssize_t send_raw_packet(const struct interface *, int, 169 const void *, ssize_t); 170 ssize_t get_raw_packet(struct interface *, int, void *, ssize_t); 171 172 int send_arp(const struct interface *, int, in_addr_t, in_addr_t); 173 174 int open_link_socket(struct interface *); 175 int link_changed(struct interface *); 176 int carrier_status(const char *); 177 #endif 178
