release/src/router/dhcpv6/common.h

   1 /*      $KAME: common.h,v 1.42 2005/09/16 11:30:13 suz Exp $    */
   2 /*
   3  * Copyright (C) 1998 and 1999 WIDE Project.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the project nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #ifdef __KAME__
  32 #define IN6_IFF_INVALID (IN6_IFF_ANYCAST|IN6_IFF_TENTATIVE|\
  33                 IN6_IFF_DUPLICATED|IN6_IFF_DETACHED)
  34 #else
  35 #define IN6_IFF_INVALID (0)
  36 #endif
  37
  38 #ifdef HAVE_ANSI_FUNC
  39 #define FNAME __func__
  40 #elif defined (HAVE_GCC_FUNCTION)
  41 #define FNAME __FUNCTION__
  42 #else
  43 #define FNAME ""
  44 #endif
  45
  46 /* XXX: bsdi4 does not have TAILQ_EMPTY */
  47 #ifndef TAILQ_EMPTY
  48 #define TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
  49 #endif
  50
  51 /* and linux *_FIRST and *_NEXT */
  52 #ifndef LIST_EMPTY
  53 #define LIST_EMPTY(head)        ((head)->lh_first == NULL)
  54 #endif
  55 #ifndef LIST_FIRST
  56 #define LIST_FIRST(head)        ((head)->lh_first)
  57 #endif
  58 #ifndef LIST_NEXT
  59 #define LIST_NEXT(elm, field)   ((elm)->field.le_next)
  60 #endif
  61 #ifndef LIST_FOREACH
  62 #define LIST_FOREACH(var, head, field)                                  \
  63         for ((var) = LIST_FIRST((head));                                \
  64             (var);                                                      \
  65             (var) = LIST_NEXT((var), field))
  66 #endif
  67 #ifndef TAILQ_FIRST
  68 #define TAILQ_FIRST(head)       ((head)->tqh_first)
  69 #endif
  70 #ifndef TAILQ_LAST
  71 #define TAILQ_LAST(head, headname)                                      \
  72         (*(((struct headname *)((head)->tqh_last))->tqh_last))
  73 #endif
  74 #ifndef TAILQ_PREV
  75 #define TAILQ_PREV(elm, headname, field)                                \
  76         (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
  77 #endif
  78 #ifndef TAILQ_NEXT
  79 #define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
  80 #endif
  81 #ifndef TAILQ_FOREACH
  82 #define TAILQ_FOREACH(var, head, field)                                 \
  83         for ((var) = TAILQ_FIRST((head));                               \
  84             (var);                                                      \
  85             (var) = TAILQ_NEXT((var), field))
  86 #endif
  87 #ifdef HAVE_TAILQ_FOREACH_REVERSE_OLD
  88 #undef TAILQ_FOREACH_REVERSE
  89 #endif
  90 #ifndef TAILQ_FOREACH_REVERSE
  91 #define TAILQ_FOREACH_REVERSE(var, head, headname, field)               \
  92         for ((var) = TAILQ_LAST((head), headname);                      \
  93             (var);                                                      \
  94             (var) = TAILQ_PREV((var), headname, field))
  95 #endif
  96
  97
  98 #ifndef SO_REUSEPORT
  99 #define SO_REUSEPORT SO_REUSEADDR
 100 #endif
 101
 102 /* s*_len stuff */
 103 static __inline u_int8_t
 104 sysdep_sa_len (const struct sockaddr *sa)
 105 {
 106 #ifndef HAVE_SA_LEN
 107   switch (sa->sa_family)
 108     {
 109     case AF_INET:
 110       return sizeof (struct sockaddr_in);
 111     case AF_INET6:
 112       return sizeof (struct sockaddr_in6);
 113     }
 114   return sizeof (struct sockaddr_in);
 115 #else
 116   return sa->sa_len;
 117 #endif
 118 }
 119
 120 extern int foreground;
 121 extern int debug_thresh;
 122 extern int duid_type;
 123 extern char *device;
 124
 125 #include "debug.h"
 126
 127 /* search option for dhcp6_find_listval() */
 128 #define MATCHLIST_PREFIXLEN 0x1
 129
 130 /* common.c */
 131 typedef enum { IFADDRCONF_ADD, IFADDRCONF_REMOVE } ifaddrconf_cmd_t;
 132 extern int dhcp6_copy_list __P((struct dhcp6_list *, struct dhcp6_list *));
 133 extern void dhcp6_move_list __P((struct dhcp6_list *, struct dhcp6_list *));
 134 extern void dhcp6_clear_list __P((struct dhcp6_list *));
 135 extern void dhcp6_clear_listval __P((struct dhcp6_listval *));
 136 extern struct dhcp6_listval *dhcp6_find_listval __P((struct dhcp6_list *,
 137     dhcp6_listval_type_t, void *, int));
 138 extern struct dhcp6_listval *dhcp6_add_listval __P((struct dhcp6_list *,
 139     dhcp6_listval_type_t, void *, struct dhcp6_list *));
 140 extern int dhcp6_vbuf_copy __P((struct dhcp6_vbuf *, struct dhcp6_vbuf *));
 141 extern void dhcp6_vbuf_free __P((struct dhcp6_vbuf *));
 142 extern int dhcp6_vbuf_cmp __P((struct dhcp6_vbuf *, struct dhcp6_vbuf *));
 143 extern struct dhcp6_event *dhcp6_create_event __P((struct dhcp6_if *, int));
 144 extern void dhcp6_remove_event __P((struct dhcp6_event *));
 145 extern void dhcp6_remove_evdata __P((struct dhcp6_event *));
 146 extern struct authparam *new_authparam __P((int, int, int));
 147 extern struct authparam *copy_authparam __P((struct authparam *));
 148 extern int dhcp6_auth_replaycheck __P((int, u_int64_t, u_int64_t));
 149 extern int getifaddr __P((struct in6_addr *, char *, struct in6_addr *,
 150                           int, int, int));
 151 extern int getifidfromaddr __P((struct in6_addr *, unsigned int *));
 152 extern int transmit_sa __P((int, struct sockaddr *, char *, size_t));
 153 extern long random_between __P((long, long));
 154 extern int prefix6_mask __P((struct in6_addr *, int));
 155 extern int sa6_plen2mask __P((struct sockaddr_in6 *, int));
 156 extern char *addr2str __P((struct sockaddr *));
 157 extern char *in6addr2str __P((struct in6_addr *, int));
 158 extern int in6_addrscopebyif __P((struct in6_addr *, char *));
 159 extern int in6_scope __P((struct in6_addr *));
 160 extern void setloglevel __P((int));
 161 extern int get_duid __P((char *, struct duid *));
 162 extern void dhcp6_init_options __P((struct dhcp6_optinfo *));
 163 extern void dhcp6_clear_options __P((struct dhcp6_optinfo *));
 164 extern int dhcp6_copy_options __P((struct dhcp6_optinfo *,
 165                                    struct dhcp6_optinfo *));
 166 extern int dhcp6_get_options __P((struct dhcp6opt *, struct dhcp6opt *,
 167                                   struct dhcp6_optinfo *));
 168 extern int dhcp6_set_options __P((int, struct dhcp6opt *, struct dhcp6opt *,
 169                                   struct dhcp6_optinfo *));
 170 extern void dhcp6_set_timeoparam __P((struct dhcp6_event *));
 171 extern void dhcp6_reset_timer __P((struct dhcp6_event *));
 172 extern char *dhcp6optstr __P((int));
 173 extern char *dhcp6msgstr __P((int));
 174 extern char *dhcp6_stcodestr __P((u_int16_t));
 175 extern char *duidstr __P((struct duid *));
 176 extern char *dhcp6_event_statestr __P((struct dhcp6_event *));
 177 extern int get_rdvalue __P((int, void *, size_t));
 178 extern int duidcpy __P((struct duid *, struct duid *));
 179 extern int duidcmp __P((struct duid *, struct duid *));
 180 extern void duidfree __P((struct duid *));
 181 extern int ifaddrconf __P((ifaddrconf_cmd_t, char *, struct sockaddr_in6 *,
 182                            int, int, int));
 183 extern int safefile __P((const char *));
 184
 185 /* missing */
 186 #ifndef HAVE_STRLCAT
 187 extern size_t strlcat __P((char *, const char *, size_t));
 188 #endif
 189 #ifndef HAVE_STRLCPY
 190 extern size_t strlcpy __P((char *, const char *, size_t));
 191 #endif
 192
 193 /*
 194  * compat hacks in case libc and kernel get out of sync:
 195  *
 196  * glibc 2.4 and uClibc 0.9.29 introduce IPV6_RECVPKTINFO etc. and change IPV6_PKTINFO
 197  * This is only supported in Linux kernel >= 2.6.14
 198  *
 199  * This is only an approximation because the kernel version that libc was compiled against
 200  * could be older or newer than the one being run.  But this should not be a problem --
 201  * we just keep using the old kernel interface.
 202  *
 203  * these are placed here because they're needed in all of socket.c, recv.c and send.c
 204  */
 205 #ifdef __linux__
 206 #  if defined IPV6_RECVHOPLIMIT || defined IPV6_RECVPKTINFO
 207 #    include <linux/version.h>
 208 #    if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
 209 #      if defined IPV6_RECVHOPLIMIT && defined IPV6_2292HOPLIMIT
 210 #        undef IPV6_RECVHOPLIMIT
 211 #        define IPV6_RECVHOPLIMIT IPV6_2292HOPLIMIT
 212 #      endif
 213 #      if defined IPV6_RECVPKTINFO && defined IPV6_2292PKTINFO
 214 #        undef IPV6_RECVPKTINFO
 215 #        undef IPV6_PKTINFO
 216 #        define IPV6_RECVPKTINFO IPV6_2292PKTINFO
 217 #        define IPV6_PKTINFO IPV6_2292PKTINFO
 218 #      endif
 219 #    endif
 220 #  endif
 221 #endif
 222