1 /*
2  * Copyright (c) 2002 - 2003
3  * NetGroup, Politecnico di Torino (Italy)
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  *
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  * 3. Neither the name of the Politecnico di Torino nor the names of its
16  * contributors may be used to endorse or promote products derived from
17  * this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 /*
33  * Include the appropriate OS header files on Windows and various flavors
34  * of UNIX, include various non-OS header files on Windows, and define
35  * various items as needed, to isolate most of netdissect's platform
36  * differences to this one file.
37  */
38 
39 #ifndef netdissect_stdinc_h
40 #define netdissect_stdinc_h
41 
42 #include <errno.h>
43 
44 #ifdef _WIN32
45 
46 /*
47  * Includes and definitions for Windows.
48  */
49 
50 #include <stdint.h>
51 #include <stdio.h>
52 #include <winsock2.h>
53 #include <ws2tcpip.h>
54 #include <ctype.h>
55 #include <time.h>
56 #include <io.h>
57 #include <fcntl.h>
58 #include <sys/types.h>
59 
60 #ifndef uint8_t
61 #define uint8_t		unsigned char
62 #endif
63 
64 #ifndef int8_t
65 #define int8_t		signed char
66 #endif
67 
68 #ifndef uint16_t
69 #define uint16_t	unsigned short
70 #endif
71 
72 #ifndef int16_t
73 #define int16_t		signed short
74 #endif
75 
76 #ifndef uint32_t
77 #define uint32_t	unsigned int
78 #endif
79 
80 #ifndef int32_t
81 #define int32_t		signed int
82 #endif
83 
84 #ifdef _MSC_EXTENSIONS
85 
86 #ifndef uint64_t
87 #define uint64_t	unsigned _int64
88 #endif
89 
90 #ifndef int64_t
91 #define int64_t		_int64
92 #endif
93 
94 #ifndef PRId64
95 #define PRId64		"I64d"
96 #endif
97 
98 #ifndef PRIo64
99 #define PRIo64		"I64o"
100 #endif
101 
102 #ifndef PRIu64
103 #define PRIu64		"I64u"
104 #endif
105 
106 #ifndef PRIx64
107 #define PRIx64		"I64x"
108 #endif
109 
110 #else /* _MSC_EXTENSIONS */
111 
112 #ifndef uint64_t
113 #define uint64_t	unsigned long long
114 #endif
115 
116 #ifndef int64_t
117 #define int64_t		long long
118 #endif
119 
120 #ifndef PRId64
121 #define PRId64		"lld"
122 #endif
123 
124 #ifndef PRIo64
125 #define PRIo64		"llo"
126 #endif
127 
128 #ifndef PRIu64
129 #define PRIu64		"llu"
130 #endif
131 
132 #ifndef PRIx64
133 #define PRIx64		"llx"
134 #endif
135 
136 #endif /* _MSC_EXTENSIONS */
137 
138 /*
139  * Suppress definition of intN_t in bittypes.h, as included by <pcap/pcap.h>
140  * on Windows.
141  * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented, and
142  * we check for u_intN_t in the UN*X configure script.)
143  */
144 #define HAVE_U_INT8_T
145 #define HAVE_U_INT16_T
146 #define HAVE_U_INT32_T
147 #define HAVE_U_INT64_T
148 
149 #ifdef _MSC_VER
150 #define stat _stat
151 #define open _open
152 #define fstat _fstat
153 #define read _read
154 #define close _close
155 #define O_RDONLY _O_RDONLY
156 #endif  /* _MSC_VER */
157 
158 /*
159  * With MSVC, for C, __inline is used to make a function an inline.
160  */
161 #ifdef _MSC_VER
162 #define inline __inline
163 #endif
164 
165 #ifdef AF_INET6
166 #define HAVE_OS_IPV6_SUPPORT
167 #endif
168 
169 #ifndef INET6_ADDRSTRLEN
170 #define INET6_ADDRSTRLEN 46
171 #endif
172 
173 /* It is in MSVC's <errno.h>, but not defined in MingW+Watcom.
174  */
175 #ifndef EAFNOSUPPORT
176 #define EAFNOSUPPORT WSAEAFNOSUPPORT
177 #endif
178 
179 #ifndef caddr_t
180 typedef char* caddr_t;
181 #endif /* caddr_t */
182 
183 #define MAXHOSTNAMELEN	64
184 #define snprintf _snprintf
185 #define vsnprintf _vsnprintf
186 #define RETSIGTYPE void
187 
188 #else /* _WIN32 */
189 
190 /*
191  * Includes and definitions for various flavors of UN*X.
192  */
193 
194 #include <ctype.h>
195 #include <unistd.h>
196 #include <netdb.h>
197 #if HAVE_INTTYPES_H
198 #include <inttypes.h>
199 #elif HAVE_STDINT_H
200 #include <stdint.h>
201 #endif
202 #include <sys/param.h>
203 #include <sys/types.h>			/* concession to AIX */
204 #include <sys/time.h>
205 #include <sys/socket.h>
206 #include <netinet/in.h>
207 
208 #ifdef TIME_WITH_SYS_TIME
209 #include <time.h>
210 #endif
211 
212 #include <arpa/inet.h>
213 
214 #endif /* _WIN32 */
215 
216 #ifndef HAVE___ATTRIBUTE__
217 #define __attribute__(x)
218 #endif
219 
220 /*
221  * Used to declare a structure unaligned, so that the C compiler,
222  * if necessary, generates code that doesn't assume alignment.
223  * This is required because there is no guarantee that the packet
224  * data we get from libpcap/WinPcap is properly aligned.
225  *
226  * This assumes that, for all compilers that support __attribute__:
227  *
228  *	1) they support __attribute__((packed));
229  *
230  *	2) for all instruction set architectures requiring strict
231  *	   alignment, declaring a structure with that attribute
232  *	   causes the compiler to generate code that handles
233  *	   misaligned 2-byte, 4-byte, and 8-byte integral
234  *	   quantities.
235  *
236  * It does not (yet) handle compilers where you can get the compiler
237  * to generate code of that sort by some other means.
238  *
239  * This is required in order to, for example, keep the compiler from
240  * generating, for
241  *
242  *	if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
243  *
244  * in print-bootp.c, code that loads the first 4-byte word of a
245  * "struct bootp", masking out the bp_hops field, and comparing the result
246  * against 0x01010600.
247  *
248  * Note: this also requires that padding be put into the structure,
249  * at least for compilers where it's implemented as __attribute__((packed)).
250  */
251 #if !(defined(_MSC_VER) && defined(UNALIGNED))
252 /* MSVC may have its own macro defined with the same name and purpose. */
253 #undef UNALIGNED
254 #define UNALIGNED	__attribute__((packed))
255 #endif
256 
257 /*
258  * fopen() read and write modes for text files and binary files.
259  */
260 #if defined(_WIN32) || defined(MSDOS)
261   #define FOPEN_READ_TXT   "rt"
262   #define FOPEN_READ_BIN   "rb"
263   #define FOPEN_WRITE_TXT  "wt"
264   #define FOPEN_WRITE_BIN  "wb"
265 #else
266   #define FOPEN_READ_TXT   "r"
267   #define FOPEN_READ_BIN   FOPEN_READ_TXT
268   #define FOPEN_WRITE_TXT  "w"
269   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
270 #endif
271 
272 /*
273  * Inline x86 assembler-language versions of ntoh[ls]() and hton[ls](),
274  * defined if the OS doesn't provide them.  These assume no more than
275  * an 80386, so, for example, it avoids the bswap instruction added in
276  * the 80486.
277  *
278  * (We don't use them on OS X; Apple provides their own, which *doesn't*
279  * avoid the bswap instruction, as OS X only supports machines that
280  * have it.)
281  */
282 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
283   #undef ntohl
284   #undef ntohs
285   #undef htonl
286   #undef htons
287 
288   static __inline__ unsigned long __ntohl (unsigned long x);
289   static __inline__ unsigned short __ntohs (unsigned short x);
290 
291   #define ntohl(x)  __ntohl(x)
292   #define ntohs(x)  __ntohs(x)
293   #define htonl(x)  __ntohl(x)
294   #define htons(x)  __ntohs(x)
295 
__ntohl(unsigned long x)296   static __inline__ unsigned long __ntohl (unsigned long x)
297   {
298     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
299              "rorl  $16, %0\n\t"    /* swap words        */
300              "xchgb %b0, %h0"       /* swap higher bytes */
301             : "=q" (x) : "0" (x));
302     return (x);
303   }
304 
__ntohs(unsigned short x)305   static __inline__ unsigned short __ntohs (unsigned short x)
306   {
307     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
308             : "=q" (x) : "0" (x));
309     return (x);
310   }
311 #endif
312 
313 /*
314  * If the OS doesn't define AF_INET6 and struct in6_addr:
315  *
316  * define AF_INET6, so we can use it internally as a "this is an
317  * IPv6 address" indication;
318  *
319  * define struct in6_addr so that we can use it for IPv6 addresses.
320  */
321 #ifndef HAVE_OS_IPV6_SUPPORT
322 #ifndef AF_INET6
323 #define AF_INET6	24
324 
325 struct in6_addr {
326 	union {
327 		__uint8_t   __u6_addr8[16];
328 		__uint16_t  __u6_addr16[8];
329 		__uint32_t  __u6_addr32[4];
330 	} __u6_addr;			/* 128-bit IP6 address */
331 };
332 #endif
333 #endif
334 
335 #ifndef NI_MAXHOST
336 #define	NI_MAXHOST	1025
337 #endif
338 
339 #ifndef INET_ADDRSTRLEN
340 #define INET_ADDRSTRLEN 16
341 #endif
342 
343 #ifndef TRUE
344 #define TRUE 1
345 #endif
346 
347 #ifndef FALSE
348 #define FALSE 0
349 #endif
350 
351 /*
352  * The Apple deprecation workaround macros below were adopted from the
353  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
354  */
355 
356 #define XSTRINGIFY(x) #x
357 
358 /*
359  *	Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
360  */
361 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
362 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
363 
364 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
365 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
366 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
367 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
368 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
369 #  else
370 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
371 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
372 #  endif
373 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
374 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
375 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
376 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
377 #else
378 #  define DIAG_OFF(x)
379 #  define DIAG_ON(x)
380 #endif
381 
382 /*
383  *	For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
384  */
385 #ifdef __APPLE__
386 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
387 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
388 #else
389 #  define USES_APPLE_DEPRECATED_API
390 #  define USES_APPLE_RST
391 #endif
392 
393 /*
394  * end of Apple deprecation workaround macros
395  */
396 
397 /*
398  * Function attributes, for various compilers.
399  */
400 #include "funcattrs.h"
401 
402 #ifndef min
403 #define min(a,b) ((a)>(b)?(b):(a))
404 #endif
405 #ifndef max
406 #define max(a,b) ((b)>(a)?(b):(a))
407 #endif
408 
409 #endif /* netdissect_stdinc_h */
410