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
36 #if !defined(CTL_FREE_LIST)
37 #define CTL_FREE_LIST 1
38 #elif CTL_FREE_LIST == 0
42 /* Limit queue size per fd */
43 #define CONTROL_QUEUE_MAX 100
46 TAILQ_ENTRY(fd_data) next;
51 TAILQ_HEAD(fd_data_head, fd_data);
54 TAILQ_ENTRY(fd_list) next;
55 struct dhcpcd_ctx *ctx;
58 struct fd_data_head queue;
61 struct fd_data_head free_queue;
64 TAILQ_HEAD(fd_list_head, fd_list);
66 #define FD_LISTEN (1<<0)
67 #define FD_UNPRIV (1<<1)
69 int control_start(struct dhcpcd_ctx *, const char *, sa_family_t);
70 int control_stop(struct dhcpcd_ctx *);
71 int control_open(const char *, sa_family_t, bool);
72 ssize_t control_send(struct dhcpcd_ctx *, int, char * const *);
73 int control_queue(struct fd_list *, void *, size_t, bool);