1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * dhcpcd - DHCP client daemon
4 * Copyright (c) 2006-2020 Roy Marples <roy@marples.name>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #define LINKLOCAL_ADDR 0xa9fe0000
33 #define LINKLOCAL_MASK IN_CLASSB_NET
34 #define LINKLOCAL_BCAST (LINKLOCAL_ADDR | ~LINKLOCAL_MASK)
37 # define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR)
44 struct in_addr pickedaddr;
45 struct ipv4_addr *addr;
46 char randomstate[128];
50 #ifndef KERNEL_RFC5227
51 struct arp_state *arp;
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 (IPV4LL_CSTATE((ifp))->addr != NULL))
63 int ipv4ll_subnetroute(rb_tree_t *, struct interface *);
64 int ipv4ll_defaultroute(rb_tree_t *,struct interface *);
65 ssize_t ipv4ll_env(FILE *, const char *, const struct interface *);
66 void ipv4ll_start(void *);
67 void ipv4ll_claimed(void *);
68 void ipv4ll_handle_failure(void *);
69 struct ipv4_addr *ipv4ll_handleifa(int, struct ipv4_addr *, pid_t pid);
70 #ifdef HAVE_ROUTE_METRIC
71 int ipv4ll_recvrt(int, const struct rt *);
74 void ipv4ll_reset(struct interface *);
75 void ipv4ll_drop(struct interface *);
76 void ipv4ll_free(struct interface *);