src/ra.h

   1 /**
   2  * Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
   3  * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License v2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  */
  15 #pragma once
  16
  17 #define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
  18                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
  19
  20 #define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
  21                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
  22
  23 struct icmpv6_opt {
  24         uint8_t type;
  25         uint8_t len;
  26         uint8_t data[6];
  27 };
  28
  29 struct icmpv6_opt_route_info {
  30         uint8_t type;
  31         uint8_t len;
  32         uint8_t prefix_len;
  33         uint8_t flags;
  34         uint32_t lifetime;
  35         uint8_t prefix[];
  36 };
  37
  38 #define ND_OPT_ROUTE_INFORMATION 24
  39
  40
  41 #define icmpv6_for_each_option(opt, start, end)\
  42         for (opt = (struct icmpv6_opt*)(start);\
  43         (void*)(opt + 1) <= (void*)(end) && opt->len > 0 &&\
  44         (void*)(opt + opt->len) <= (void*)(end); opt += opt->len)
  45
  46
  47 int ra_init(const char *ifname, const struct in6_addr *ifid,
  48                 unsigned int options, unsigned int holdoff_interval);
  49 bool ra_link_up(void);
  50 bool ra_process(void);