1 /* $NetBSD: ipv4ll.h,v 1.10 2015/08/21 10:39:00 roy Exp $ */ 2 3 /* 4 * dhcpcd - DHCP client daemon 5 * Copyright (c) 2006-2015 Roy Marples <roy@marples.name> 6 * All rights reserved 7 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef IPV4LL_H 31 #define IPV4LL_H 32 33 #include "arp.h" 34 35 extern const struct in_addr inaddr_llmask; 36 extern const struct in_addr inaddr_llbcast; 37 38 #define LINKLOCAL_ADDR 0xa9fe0000 39 #define LINKLOCAL_MASK IN_CLASSB_NET 40 #define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK) 41 42 #ifndef IN_LINKLOCAL 43 # define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR) 44 #endif 45 46 struct ipv4ll_state { 47 struct in_addr addr; 48 struct arp_state *arp; 49 unsigned int conflicts; 50 struct timespec defend; 51 char randomstate[128]; 52 uint8_t down; 53 }; 54 55 #define IPV4LL_STATE(ifp) \ 56 ((struct ipv4ll_state *)(ifp)->if_data[IF_DATA_IPV4LL]) 57 #define IPV4LL_CSTATE(ifp) \ 58 ((const struct ipv4ll_state *)(ifp)->if_data[IF_DATA_IPV4LL]) 59 #define IPV4LL_STATE_RUNNING(ifp) \ 60 (IPV4LL_CSTATE((ifp)) && !IPV4LL_CSTATE((ifp))->down && \ 61 IN_LINKLOCAL(ntohl(IPV4LL_CSTATE((ifp))->addr.s_addr))) 62 63 struct rt* ipv4ll_subnet_route(const struct interface *); 64 struct rt* ipv4ll_default_route(const struct interface *); 65 ssize_t ipv4ll_env(char **, const char *, const struct interface *); 66 void ipv4ll_start(void *); 67 void ipv4ll_claimed(void *); 68 void ipv4ll_handle_failure(void *); 69 70 #define ipv4ll_free(ifp) ipv4ll_freedrop((ifp), 0); 71 #define ipv4ll_drop(ifp) ipv4ll_freedrop((ifp), 1); 72 void ipv4ll_freedrop(struct interface *, int); 73 74 #endif 75