18d36e1dfSRoy Marples /* SPDX-License-Identifier: BSD-2-Clause */ 27827cba2SAaron LI /* 37827cba2SAaron LI * dhcpcd - DHCP client daemon 480aa9461SRoy Marples * Copyright (c) 2006-2023 Roy Marples <roy@marples.name> 57827cba2SAaron LI * All rights reserved 67827cba2SAaron LI 77827cba2SAaron LI * Redistribution and use in source and binary forms, with or without 87827cba2SAaron LI * modification, are permitted provided that the following conditions 97827cba2SAaron LI * are met: 107827cba2SAaron LI * 1. Redistributions of source code must retain the above copyright 117827cba2SAaron LI * notice, this list of conditions and the following disclaimer. 127827cba2SAaron LI * 2. Redistributions in binary form must reproduce the above copyright 137827cba2SAaron LI * notice, this list of conditions and the following disclaimer in the 147827cba2SAaron LI * documentation and/or other materials provided with the distribution. 157827cba2SAaron LI * 167827cba2SAaron LI * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 177827cba2SAaron LI * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 187827cba2SAaron LI * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 197827cba2SAaron LI * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 207827cba2SAaron LI * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 217827cba2SAaron LI * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 227827cba2SAaron LI * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 237827cba2SAaron LI * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 247827cba2SAaron LI * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 257827cba2SAaron LI * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 267827cba2SAaron LI * SUCH DAMAGE. 277827cba2SAaron LI */ 287827cba2SAaron LI 297827cba2SAaron LI #ifndef IPV4LL_H 307827cba2SAaron LI #define IPV4LL_H 317827cba2SAaron LI 327827cba2SAaron LI #define LINKLOCAL_ADDR 0xa9fe0000 337827cba2SAaron LI #define LINKLOCAL_MASK IN_CLASSB_NET 347827cba2SAaron LI #define LINKLOCAL_BCAST (LINKLOCAL_ADDR | ~LINKLOCAL_MASK) 357827cba2SAaron LI 367827cba2SAaron LI #ifndef IN_LINKLOCAL 377827cba2SAaron LI # define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR) 387827cba2SAaron LI #endif 397827cba2SAaron LI 407827cba2SAaron LI #ifdef IPV4LL 417827cba2SAaron LI #include "arp.h" 427827cba2SAaron LI 437827cba2SAaron LI struct ipv4ll_state { 448d36e1dfSRoy Marples struct in_addr pickedaddr; 457827cba2SAaron LI struct ipv4_addr *addr; 467827cba2SAaron LI char randomstate[128]; 47*0b4c9755SRoy Marples bool running; 488d36e1dfSRoy Marples bool seeded; 498d36e1dfSRoy Marples bool down; 508d36e1dfSRoy Marples size_t conflicts; 51d4fb1e02SRoy Marples #ifndef KERNEL_RFC5227 52d4fb1e02SRoy Marples struct arp_state *arp; 53d4fb1e02SRoy Marples #endif 547827cba2SAaron LI }; 557827cba2SAaron LI 567827cba2SAaron LI #define IPV4LL_STATE(ifp) \ 577827cba2SAaron LI ((struct ipv4ll_state *)(ifp)->if_data[IF_DATA_IPV4LL]) 587827cba2SAaron LI #define IPV4LL_CSTATE(ifp) \ 597827cba2SAaron LI ((const struct ipv4ll_state *)(ifp)->if_data[IF_DATA_IPV4LL]) 607827cba2SAaron LI #define IPV4LL_STATE_RUNNING(ifp) \ 617827cba2SAaron LI (IPV4LL_CSTATE((ifp)) && !IPV4LL_CSTATE((ifp))->down && \ 627827cba2SAaron LI (IPV4LL_CSTATE((ifp))->addr != NULL)) 637827cba2SAaron LI 648d36e1dfSRoy Marples int ipv4ll_subnetroute(rb_tree_t *, struct interface *); 658d36e1dfSRoy Marples int ipv4ll_defaultroute(rb_tree_t *,struct interface *); 668d36e1dfSRoy Marples ssize_t ipv4ll_env(FILE *, const char *, const struct interface *); 677827cba2SAaron LI void ipv4ll_start(void *); 687827cba2SAaron LI void ipv4ll_claimed(void *); 697827cba2SAaron LI void ipv4ll_handle_failure(void *); 701b3b16a2SRoy Marples struct ipv4_addr *ipv4ll_handleifa(int, struct ipv4_addr *, pid_t pid); 717827cba2SAaron LI #ifdef HAVE_ROUTE_METRIC 727827cba2SAaron LI int ipv4ll_recvrt(int, const struct rt *); 737827cba2SAaron LI #endif 747827cba2SAaron LI 758d36e1dfSRoy Marples void ipv4ll_reset(struct interface *); 768d36e1dfSRoy Marples void ipv4ll_drop(struct interface *); 778d36e1dfSRoy Marples void ipv4ll_free(struct interface *); 787827cba2SAaron LI #endif 797827cba2SAaron LI 807827cba2SAaron LI #endif 81