1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * dhcpcd - DHCP client daemon 4 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name> 5 * All rights reserved 6 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef CONTROL_H 30 #define CONTROL_H 31 32 #include "dhcpcd.h" 33 34 #if !defined(CTL_FREE_LIST) 35 #define CTL_FREE_LIST 1 36 #elif CTL_FREE_LIST == 0 37 #undef CTL_FREE_LIST 38 #endif 39 40 /* Limit queue size per fd */ 41 #define CONTROL_QUEUE_MAX 100 42 43 struct fd_data { 44 TAILQ_ENTRY(fd_data) next; 45 void *data; 46 size_t data_size; 47 size_t data_len; 48 }; 49 TAILQ_HEAD(fd_data_head, fd_data); 50 51 struct fd_list { 52 TAILQ_ENTRY(fd_list) next; 53 struct dhcpcd_ctx *ctx; 54 int fd; 55 unsigned int flags; 56 struct fd_data_head queue; 57 size_t queue_len; 58 #ifdef CTL_FREE_LIST 59 struct fd_data_head free_queue; 60 #endif 61 }; 62 TAILQ_HEAD(fd_list_head, fd_list); 63 64 #define FD_LISTEN (1<<0) 65 #define FD_UNPRIV (1<<1) 66 67 int control_start(struct dhcpcd_ctx *, const char *); 68 int control_stop(struct dhcpcd_ctx *); 69 int control_open(const char *); 70 ssize_t control_send(struct dhcpcd_ctx *, int, char * const *); 71 int control_queue(struct fd_list *, void *, size_t, bool); 72 void control_close(struct dhcpcd_ctx *ctx); 73 74 #endif 75