1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * dhcpcd - DHCP client daemon 4 * Copyright (c) 2006-2023 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 <stdbool.h> 33 34 #include "dhcpcd.h" 35 36 #if !defined(CTL_FREE_LIST) 37 #define CTL_FREE_LIST 1 38 #elif CTL_FREE_LIST == 0 39 #undef CTL_FREE_LIST 40 #endif 41 42 /* Limit queue size per fd */ 43 #define CONTROL_QUEUE_MAX 100 44 45 struct fd_data { 46 TAILQ_ENTRY(fd_data) next; 47 void *data; 48 size_t data_size; 49 size_t data_len; 50 unsigned int data_flags; 51 }; 52 TAILQ_HEAD(fd_data_head, fd_data); 53 54 struct fd_list { 55 TAILQ_ENTRY(fd_list) next; 56 struct dhcpcd_ctx *ctx; 57 int fd; 58 unsigned int flags; 59 struct fd_data_head queue; 60 #ifdef CTL_FREE_LIST 61 struct fd_data_head free_queue; 62 #endif 63 }; 64 TAILQ_HEAD(fd_list_head, fd_list); 65 66 #define FD_LISTEN 0x01U 67 #define FD_UNPRIV 0x02U 68 #define FD_SENDLEN 0x04U 69 70 int control_start(struct dhcpcd_ctx *, const char *, sa_family_t); 71 int control_stop(struct dhcpcd_ctx *); 72 int control_open(const char *, sa_family_t, bool); 73 ssize_t control_send(struct dhcpcd_ctx *, int, char * const *); 74 struct fd_list *control_new(struct dhcpcd_ctx *, int, unsigned int); 75 void control_free(struct fd_list *); 76 void control_delete(struct fd_list *); 77 int control_queue(struct fd_list *, void *, size_t); 78 void control_recvdata(struct fd_list *fd, char *, size_t); 79 #endif 80