external/bsd/dhcpcd/dist/control.h

   1 /* $NetBSD: control.h,v 1.7 2015/01/30 09:47:05 roy Exp $ */
   2
   3 /*
   4  * dhcpcd - DHCP client daemon
   5  * Copyright (c) 2006-2015 Roy Marples <roy@marples.name>
   6  * All rights reserved
   7
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef CONTROL_H
  31 #define CONTROL_H
  32
  33 #include "dhcpcd.h"
  34
  35 /* Limit queue size per fd */
  36 #define CONTROL_QUEUE_MAX       100
  37
  38 struct fd_data {
  39         TAILQ_ENTRY(fd_data) next;
  40         char *data;
  41         size_t data_len;
  42         uint8_t freeit;
  43 };
  44 TAILQ_HEAD(fd_data_head, fd_data);
  45
  46 struct fd_list {
  47         TAILQ_ENTRY(fd_list) next;
  48         struct dhcpcd_ctx *ctx;
  49         int fd;
  50         unsigned int flags;
  51         struct fd_data_head queue;
  52         struct fd_data_head free_queue;
  53 };
  54 TAILQ_HEAD(fd_list_head, fd_list);
  55
  56 #define FD_LISTEN       (1<<0)
  57 #define FD_UNPRIV       (1<<1)
  58
  59 int control_start(struct dhcpcd_ctx *, const char *);
  60 int control_stop(struct dhcpcd_ctx *);
  61 int control_open(struct dhcpcd_ctx *, const char *);
  62 ssize_t control_send(struct dhcpcd_ctx *, int, char * const *);
  63 int control_queue(struct fd_list *fd, char *data, size_t data_len, uint8_t fit);
  64 void control_close(struct dhcpcd_ctx *ctx);
  65
  66 #endif