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      1 /*	$NetBSD: osdep.h,v 1.4 2022/04/03 01:10:58 christos Exp $	*/
      2 
      3 /* osdep.h
      4 
      5    Operating system dependencies... */
      6 
      7 /*
      8  * Copyright (C) 2004-2022 Internet Systems Consortium,Inc. ("ISC")
      9  * Copyright (c) 1996-2003 by Internet Software Consortium
     10  *
     11  * This Source Code Form is subject to the terms of the Mozilla Public
     12  * License, v. 2.0. If a copy of the MPL was not distributed with this
     13  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
     16  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     17  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
     18  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     19  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     20  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
     21  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     22  *
     23  *   Internet Systems Consortium, Inc.
     24  *   PO Box 360
     25  *   Newmarket, NH 03857 USA
     26  *   <info (at) isc.org>
     27  *   https://www.isc.org/
     28  *
     29  */
     30 
     31 #if !defined (__ISC_DHCP_OSDEP_H__)
     32 #define __ISC_DHCP_OSDEP_H__
     33 
     34 #include "site.h"
     35 
     36 #include "config.h"
     37 
     38 #include <inttypes.h>
     39 
     40 #ifndef LITTLE_ENDIAN
     41 #define LITTLE_ENDIAN 1234
     42 #endif /* LITTLE_ENDIAN */
     43 
     44 #ifndef BIG_ENDIAN
     45 #define BIG_ENDIAN 4321
     46 #endif /* BIG_ENDIAN */
     47 
     48 #ifndef BYTE_ORDER
     49 #define BYTE_ORDER DHCP_BYTE_ORDER
     50 #endif /* BYTE_ORDER */
     51 
     52 /* Porting::
     53 
     54    If you add a new network API, you must add a check for it below: */
     55 
     56 #if !defined (USE_SOCKETS) && \
     57     !defined (USE_SOCKET_SEND) && \
     58     !defined (USE_SOCKET_RECEIVE) && \
     59     !defined (USE_RAW_SOCKETS) && \
     60     !defined (USE_RAW_SEND) && \
     61     !defined (USE_SOCKET_RECEIVE) && \
     62     !defined (USE_BPF) && \
     63     !defined (USE_BPF_SEND) && \
     64     !defined (USE_BPF_RECEIVE) && \
     65     !defined (USE_LPF) && \
     66     !defined (USE_LPF_SEND) && \
     67     !defined (USE_LPF_RECEIVE) && \
     68     !defined (USE_NIT) && \
     69     !defined (USE_NIT_SEND) && \
     70     !defined (USE_NIT_RECEIVE) && \
     71     !defined (USE_DLPI_SEND) && \
     72     !defined (USE_DLPI_RECEIVE)
     73 /* Determine default socket API to USE. */
     74 # if defined(HAVE_BPF)
     75 #  define USE_BPF 1
     76 # elif defined(HAVE_LPF)
     77 #  define USE_LPF 1
     78 # elif defined(HAVE_DLPI)
     79 #  define USE_DLPI 1
     80 # endif
     81 #endif
     82 
     83 #if !defined (TIME_MAX)
     84 # define TIME_MAX 2147483647
     85 #endif
     86 
     87 /* snprintf/vsnprintf hacks.  for systems with no libc versions only. */
     88 #ifdef NO_SNPRINTF
     89   extern int isc_print_snprintf(char *, size_t, const char *, ...);
     90   extern int isc_print_vsnprintf(char *, size_t, const char *, va_list ap);
     91 # define snprintf  isc_print_snprintf
     92 # define vsnprintf isc_print_vsnprintf
     93 #endif
     94 
     95 /* Porting::
     96 
     97    If you add a new network API, and have it set up so that it can be
     98    used for sending or receiving, but doesn't have to be used for both,
     99    then set up an ifdef like the ones below: */
    100 
    101 #ifdef USE_SOCKETS
    102 #  define USE_SOCKET_SEND
    103 #  define USE_SOCKET_RECEIVE
    104 #  if defined(HAVE_DLPI) && !defined(sun) && !defined(USE_V4_PKTINFO)
    105 #    define USE_DLPI_HWADDR
    106 #  elif defined(HAVE_LPF)
    107 #    define USE_LPF_HWADDR
    108 #  elif defined(HAVE_BPF)
    109 #    define USE_BPF_HWADDR
    110 #  endif
    111 #endif
    112 
    113 #ifdef USE_RAW_SOCKETS
    114 #  define USE_RAW_SEND
    115 #  define USE_SOCKET_RECEIVE
    116 #endif
    117 
    118 #ifdef USE_BPF
    119 #  define USE_BPF_SEND
    120 #  define USE_BPF_RECEIVE
    121 #endif
    122 
    123 #ifdef USE_LPF
    124 #  define USE_LPF_SEND
    125 #  define USE_LPF_RECEIVE
    126 #endif
    127 
    128 #ifdef USE_NIT
    129 #  define USE_NIT_SEND
    130 #  define USE_NIT_RECEIVE
    131 #endif
    132 
    133 #ifdef USE_DLPI
    134 #  define USE_DLPI_SEND
    135 #  define USE_DLPI_RECEIVE
    136 #endif
    137 
    138 #ifdef USE_UPF
    139 #  define USE_UPF_SEND
    140 #  define USE_UPF_RECEIVE
    141 #endif
    142 
    143 #if defined (SO_BINDTODEVICE) && !defined (HAVE_SO_BINDTODEVICE)
    144 # define HAVE_SO_BINDTODEVICE
    145 #endif
    146 
    147 /* Porting::
    148 
    149    If you add support for sending packets directly out an interface,
    150    and your support does not do ARP or routing, you must use a fallback
    151    mechanism to deal with packets that need to be sent to routers.
    152    Currently, all low-level packet interfaces use BSD sockets as a
    153    fallback. */
    154 
    155 #if defined (USE_BPF_SEND) || defined (USE_NIT_SEND) || \
    156     defined (USE_DLPI_SEND) || defined (USE_UPF_SEND) || \
    157     defined (USE_LPF_SEND) || \
    158     (defined (USE_SOCKET_SEND) && defined (HAVE_SO_BINDTODEVICE))
    159 #  define USE_SOCKET_FALLBACK
    160 #  define USE_FALLBACK
    161 #endif
    162 
    163 /* Porting::
    164 
    165    If you add support for sending packets directly out an interface
    166    and need to be able to assemble packets, add the USE_XXX_SEND
    167    definition for your interface to the list tested below. */
    168 
    169 #if defined (USE_RAW_SEND) || defined (USE_BPF_SEND) || \
    170 		defined (USE_NIT_SEND) || defined (USE_UPF_SEND) || \
    171 		defined (USE_DLPI_SEND) || defined (USE_LPF_SEND)
    172 #  define PACKET_ASSEMBLY
    173 #endif
    174 
    175 /* Porting::
    176 
    177    If you add support for receiving packets directly from an interface
    178    and need to be able to decode raw packets, add the USE_XXX_RECEIVE
    179    definition for your interface to the list tested below. */
    180 
    181 #if defined (USE_RAW_RECEIVE) || defined (USE_BPF_SEND) || \
    182 		defined (USE_NIT_RECEIVE) || defined (USE_UPF_RECEIVE) || \
    183 		defined (USE_DLPI_RECEIVE) || defined (USE_LPF_RECEIVE)
    184 #  define PACKET_DECODING
    185 #endif
    186 
    187 /* If we don't have a DLPI packet filter, we have to filter in userland.
    188    Probably not worth doing, actually. */
    189 #if defined (USE_DLPI_RECEIVE) && !defined (USE_DLPI_PFMOD)
    190 #  define USERLAND_FILTER
    191 #endif
    192 
    193 /* jmp_buf is assumed to be a struct unless otherwise defined in the
    194    system header. */
    195 #ifndef jbp_decl
    196 # define jbp_decl(x)	jmp_buf *x
    197 #endif
    198 #ifndef jref
    199 # define jref(x)	(&(x))
    200 #endif
    201 #ifndef jdref
    202 # define jdref(x)	(*(x))
    203 #endif
    204 #ifndef jrefproto
    205 # define jrefproto	jmp_buf *
    206 #endif
    207 
    208 #ifndef BPF_FORMAT
    209 # define BPF_FORMAT "/dev/bpf%d"
    210 #endif
    211 
    212 #if defined (F_SETFD) && !defined (HAVE_SETFD)
    213 # define HAVE_SETFD
    214 #endif
    215 
    216 #if defined (IFF_POINTOPOINT) && !defined (HAVE_IFF_POINTOPOINT)
    217 # define HAVE_IFF_POINTOPOINT
    218 #endif
    219 
    220 #if defined (AF_LINK) && !defined (HAVE_AF_LINK)
    221 # define HAVE_AF_LINK
    222 #endif
    223 
    224 #if defined (ARPHRD_TUNNEL) && !defined (HAVE_ARPHRD_TUNNEL)
    225 # define HAVE_ARPHRD_TUNNEL
    226 #endif
    227 
    228 #if defined (ARPHRD_LOOPBACK) && !defined (HAVE_ARPHRD_LOOPBACK)
    229 # define HAVE_ARPHRD_LOOPBACK
    230 #endif
    231 
    232 #if defined (ARPHRD_ROSE) && !defined (HAVE_ARPHRD_ROSE)
    233 # define HAVE_ARPHRD_ROSE
    234 #endif
    235 
    236 #if defined (ARPHRD_IRDA) && !defined (HAVE_ARPHRD_IRDA)
    237 # define HAVE_ARPHRD_IRDA
    238 #endif
    239 
    240 #if defined (ARPHRD_SIT) && !defined (HAVE_ARPHRD_SIT)
    241 # define HAVE_ARPHRD_SIT
    242 #endif
    243 
    244 #if defined (ARPHRD_IEEE1394) & !defined (HAVE_ARPHRD_IEEE1394)
    245 # define HAVE_ARPHRD_IEEE1394
    246 #endif
    247 
    248 #if defined (ARPHRD_IEEE802) && !defined (HAVE_ARPHRD_IEEE802)
    249 # define HAVE_ARPHRD_IEEE802
    250 #endif
    251 
    252 #if defined (ARPHRD_IEEE802_TR) && !defined (HAVE_ARPHRD_IEEE802_TR)
    253 # define HAVE_ARPHRD_IEEE802_TR
    254 #endif
    255 
    256 #if defined (ARPHRD_FDDI) && !defined (HAVE_ARPHRD_FDDI)
    257 # define HAVE_ARPHRD_FDDI
    258 #endif
    259 
    260 #if defined (ARPHRD_AX25) && !defined (HAVE_ARPHRD_AX25)
    261 # define HAVE_ARPHRD_AX25
    262 #endif
    263 
    264 #if defined (ARPHRD_NETROM) && !defined (HAVE_ARPHRD_NETROM)
    265 # define HAVE_ARPHRD_NETROM
    266 #endif
    267 
    268 #if defined (ARPHRD_METRICOM) && !defined (HAVE_ARPHRD_METRICOM)
    269 # define HAVE_ARPHRD_METRICOM
    270 #endif
    271 
    272 #if defined (AF_LINK) && !defined (HAVE_AF_LINK)
    273 # define HAVE_AF_LINK
    274 #endif
    275 
    276 /* Linux needs to define SHUT_* in /usr/include/sys/socket.h someday... */
    277 #if !defined (SHUT_RD)
    278 # define SHUT_RD 0
    279 #endif
    280 
    281 #if !defined (SOCKLEN_T)
    282 # define SOCKLEN_T socklen_t
    283 #elif defined(_AIX)
    284 #undef SOCKLEN_T
    285 #define SOCKLEN_T socklen_t
    286 #endif
    287 
    288 #if !defined (STDERR_FILENO)
    289 # define STDERR_FILENO 2
    290 #endif
    291 
    292 #endif /* __ISC_DHCP_OSDEP_H__ */
    293