common/common.h

   1 /**********************************************************
   2  SixXS - Automatic IPv6 Connectivity Configuration Utility
   3 ***********************************************************
   4  Copyright 2003-2005 SixXS - http://www.sixxs.net
   5 ***********************************************************
   6  common/common.h - Common Definitions
   7 ***********************************************************
   8  $Author: jeroen $
   9  $Id: common.h,v 1.23 2007-01-11 14:50:51 jeroen Exp $
  10  $Date: 2007-01-11 14:50:51 $
  11 **********************************************************/
  12
  13 #ifndef AICCU_COMMON_H
  14 #define AICCU_COMMON_H "H5K7:W3NDY5UU5N1K1N1C0l3"
  15
  16 #ifdef _DEBUG
  17 #define D(x) x
  18 #else
  19 #define D(x) {}
  20 #endif
  21
  22 #ifndef _OPENBSD
  23 #ifndef _SUNOS
  24 #ifndef _AIX
  25 #ifndef _XOPEN_SOURCE
  26 #define _XOPEN_SOURCE
  27 #endif
  28 #endif
  29 #endif
  30 #endif
  31 #define __STRICT_ANSI__
  32
  33 /* Don't deprecate strncat etc. */
  34 #ifdef _WIN32
  35 #define _CRT_SECURE_NO_DEPRECATE
  36 #endif
  37
  38 #ifdef _AIX
  39 #define _H_ARPA_ONAMESER_COMPAT "AICCU workaround"
  40 #include <net/net_globals.h>
  41 #endif
  42
  43 #include <stdio.h>
  44 #include <errno.h>
  45 #include <stdarg.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <ctype.h>
  49 #include <time.h>
  50 #include <signal.h>
  51 #include <sys/types.h>
  52 #include <sys/stat.h>
  53 #include <fcntl.h>
  54
  55 #if defined(_SUNOS) || defined(_AIX) || defined(_DARWIN)
  56 /* Include this as it knows quite a bit about endianess */
  57 #include <arpa/nameser_compat.h>
  58 #else
  59 #ifndef _WIN32
  60 #if defined(_OPENBSD) || defined(_DFBSD) || defined(_FREEBSD) || defined(_NETBSD)
  61 #include <sys/endian.h>
  62 #else
  63 #include <endian.h>
  64 #endif
  65 #endif
  66 #endif
  67
  68 /* For MD5 routines */
  69 #define __USE_BSD 1
  70 #include <sys/types.h>
  71
  72 #ifndef _WIN32
  73         /* Unix Specifics */
  74
  75 #ifndef linux
  76         #include <netinet/in_systm.h>
  77 #endif
  78
  79 #ifdef _DARWIN
  80 #define _BSD_SOCKLEN_T_
  81 #endif
  82
  83         #include <sys/socket.h>
  84         #include <netinet/in.h>
  85         #include <netdb.h>
  86         #include <unistd.h>
  87         #include <strings.h>
  88         #include <syslog.h>
  89         #include <arpa/inet.h>
  90         #include <sys/ioctl.h>
  91         #include <sys/select.h>
  92
  93         #include <net/if.h>
  94         #include <netinet/if_ether.h>
  95 #ifdef linux
  96         #include <netpacket/packet.h>
  97         #include <linux/if_tun.h>
  98 #else
  99 #ifdef _DFBSD
 100         #include <net/tun/if_tun.h>
 101 #else
 102 #ifdef _DARWIN
 103         /*
 104          * Darwin doesn't have TUN/TAP support per default
 105          * It is available from http://www-user.rhrk.uni-kl.de/~nissler/tuntap/
 106          * which is a port made by Mattias Nissler
 107          * for compiling convienience we have included the ioctl's here
 108          */
 109         #define TUNSIFHEAD  _IOW('t', 96, int)
 110         #define TUNGIFHEAD  _IOR('t', 97, int)
 111 #else
 112 #ifndef _AIX
 113         #include <net/if_tun.h>
 114 /* endif for !_AIX */
 115 #endif
 116 /* endif for _DARWIN else */
 117 #endif
 118 /* endif for _DFBSD else */
 119 #endif
 120 /* endif for linux else */
 121 #endif
 122         #include <netinet/ip.h>
 123         #include <netinet/ip6.h>
 124         #include <netinet/icmp6.h>
 125         #include <netinet/tcp.h>
 126         #include <netinet/udp.h>
 127         #include <netinet/ip_icmp.h>
 128         #include <sys/ioctl.h>
 129
 130 #if defined(_OPENBSD) || defined(_DARWIN) || defined(_FREEBSD) || defined(_DFBSD)
 131         #include <sys/uio.h>
 132 #endif
 133
 134         #include <pthread.h>
 135
 136         /*
 137          * Windows abstracts sockets to a different
 138          * type, as this is actually pretty nice
 139          * we'll do it too
 140          */
 141         #ifndef SOCKET
 142                 typedef int SOCKET;
 143         #endif
 144
 145         /* closesocket() -> close() on unices */
 146         #define closesocket close
 147
 148         /*
 149          * Expect a BSD style in6_addr who puts
 150          * this between a #ifdef _KERNEL...
 151          * Probably against people doing stuff in userspace?
 152          */
 153         #ifndef s6_addr
 154         #ifndef _SUNOS
 155         #define s6_addr __u6_addr.__u6_addr8
 156         #else
 157         #define s6_addr _S6_un._S6_u8
 158         #endif
 159         #endif
 160 #else
 161
 162         /* Winsock */
 163         #include <winsock2.h>
 164         #include <ws2tcpip.h>
 165
 166         /* Windows Specifics */
 167         #include <io.h>
 168
 169 /*
 170          * Some weird M$ person thought it was
 171          * funny to underscore common functions !?
 172          */
 173         #define snprintf        _snprintf
 174         #define vsnprintf       _vsnprintf
 175         #define strcasecmp      _stricmp
 176         #define strncasecmp     _strnicmp
 177         #define strdup          _strdup
 178
 179         /*
 180          * Capitalize this one
 181          * Sleep() is in milliseconds
 182          */
 183         #define sleep(x) Sleep(x*1000)
 184
 185         /* No syslog on Windows */
 186         #define LOG_DEBUG 1
 187         #define LOG_ERR 2
 188         #define LOG_WARNING 3
 189         #define LOG_INFO 4
 190
 191         typedef unsigned long u_int32_t;
 192         typedef unsigned long long u_int64_t;
 193
 194         typedef unsigned char u_int8_t;
 195         typedef unsigned __int16 u_int16_t;
 196         typedef unsigned __int64 u_int64_t;
 197
 198         /* Not available in the Winsock2 includes */
 199         #define IPPROTO_NONE 59 /* IPv6 no next header */
 200
 201         #define BIG_ENDIAN 4321
 202         #define LITTLE_ENDIAN 1234
 203
 204         #define __BIG_ENDIAN BIG_ENDIAN
 205         #define __LITTLE_ENDIAN LITTLE_ENDIAN
 206
 207         /* Fix byte order */
 208         #define __BYTE_ORDER __LITTLE_ENDIAN
 209         #define BYTE_ORDER LITTLE_ENDIAN
 210
 211         #define s6_addr16       _S6_un.Word
 212         #define SHUT_RDWR       SD_BOTH
 213         #define uint8_t         u_int8_t
 214         #define uint16_t        u_int16_t
 215         #define uint32_t        u_int32_t
 216         #define uint64_t        u_int64_t
 217
 218         struct ether
 219         {
 220                 uint16_t        ether_dhost[3];
 221                 uint16_t        ether_shost[3];
 222                 uint16_t        ether_type;
 223         };
 224
 225         /* The IPv6 Header */
 226         struct ip6_hdr
 227         {
 228                 union
 229                 {
 230                         struct ip6_hdrctl
 231                         {
 232                                 uint32_t        ip6_un1_flow;   /* 4 bits version, 8 bits TC, 20 bits flow-ID */
 233                                 uint16_t        ip6_un1_plen;   /* payload length */
 234                                 uint8_t         ip6_un1_nxt;    /* next header */
 235                                 uint8_t         ip6_un1_hlim;   /* hop limit */
 236                         }                       ip6_un1;
 237                         uint8_t                 ip6_un2_vfc;    /* 4 bits version, top 4 bits tclass */
 238                 }                               ip6_ctlun;
 239                 struct in6_addr ip6_src;                        /* source address */
 240                 struct in6_addr ip6_dst;                        /* destination address */
 241         };
 242
 243         /* ICMPv6 */
 244         struct icmp6_hdr
 245         {
 246                 uint8_t                 icmp6_type;             /* type field */
 247                 uint8_t                 icmp6_code;             /* code field */
 248                 uint16_t                icmp6_cksum;            /* checksum field */
 249                 union
 250                 {
 251                         uint32_t        icmp6_un_data32[1];     /* type-specific field */
 252                         uint16_t        icmp6_un_data16[2];     /* type-specific field */
 253                         uint8_t         icmp6_un_data8[4];      /* type-specific field */
 254                 } icmp6_dataun;
 255         };
 256
 257         #define ND_NEIGHBOR_SOLICIT         135
 258         #define ND_NEIGHBOR_ADVERT          136
 259
 260         struct nd_neighbor_solicit
 261         {
 262                 struct in6_addr         nd_ns_target;           /* target address */
 263                                                                 /* could be followed by options */
 264         };
 265
 266         struct nd_neighbor_advert
 267         {
 268                 struct in6_addr         nd_na_target;           /* target address */
 269                                                                 /* could be followed by options */
 270                 uint8_t                 nd_no_type;             /* Option providing the target MAC address */
 271                 uint8_t                 nd_no_len;              /* Length (1) */
 272                 uint8_t                 nd_no_mac[6];           /* MAC address */
 273
 274         };
 275
 276         const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt);
 277         int inet_pton(int af, const char *src, void *dst);
 278 #endif /* WIN32 */
 279
 280
 281 #ifndef MSG_NOSIGNAL
 282 #define MSG_NOSIGNAL    0
 283 #endif
 284
 285 #ifndef LITTLE_ENDIAN
 286 #define LITTLE_ENDIAN  __LITTLE_ENDIAN
 287 #endif
 288 #ifndef BIG_ENDIAN
 289 #define BIG_ENDIAN     __BIG_ENDIAN
 290 #endif
 291 #ifndef PDP_ENDIAN
 292 #define PDP_ENDIAN     __PDP_ENDIAN
 293 #endif
 294 #ifndef BYTE_ORDER
 295 #define BYTE_ORDER     __BYTE_ORDER
 296 #endif
 297
 298 /* Boolean support */
 299 #ifndef bool
 300 #define bool uint32_t
 301 #endif
 302 #ifndef false
 303 #define false 0
 304 #endif
 305 #ifndef true
 306 #define true (!false)
 307 #endif
 308
 309 #ifndef offsetof
 310 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 311 #endif
 312
 313 /* Include MD5 and SHA1 support */
 314 #include "hash_md5.h"
 315 #include "hash_sha1.h"
 316
 317 /* Resolver includes */
 318 #ifndef _WIN32
 319 #include <netinet/in.h>
 320 #include <arpa/nameser.h>
 321 #include <resolv.h>
 322 #include <netdb.h>
 323 #endif
 324
 325 #ifdef AICCU_GNUTLS
 326 #include <gnutls/gnutls.h>
 327 #endif
 328
 329 #ifndef NS_GET16SZ
 330 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
 331 #endif
 332
 333 #ifndef NS_GET32SZ
 334 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
 335 #endif
 336
 337
 338 #ifndef NS_GET16
 339 #define NS_GET16(s, cp) do { \
 340         register u_char *t_cp = (u_char *)(cp); \
 341         (s) = ((u_int16_t)t_cp[0] << 8) \
 342             | ((u_int16_t)t_cp[1]) \
 343             ; \
 344         (cp) += NS_INT16SZ; \
 345 } while (0)
 346 #endif
 347
 348 #ifndef NS_GET32
 349 #define NS_GET32(l, cp) do { \
 350         register u_char *t_cp = (u_char *)(cp); \
 351         (l) = ((u_int32_t)t_cp[0] << 24) \
 352             | ((u_int32_t)t_cp[1] << 16) \
 353             | ((u_int32_t)t_cp[2] << 8) \
 354             | ((u_int32_t)t_cp[3]) \
 355             ; \
 356         (cp) += NS_INT32SZ; \
 357 } while (0)
 358 #endif
 359
 360 /* parseline() rules */
 361 enum pl_ruletype
 362 {
 363         PLRT_STRING,            /* Offset points to a String (strdup()) */
 364         PLRT_INTEGER,           /* Offset points to a Integer (unsigned int) */
 365         PLRT_BOOL,              /* Offset points to a Boolean. */
 366         PLRT_IPV4,              /* Offset points to a IPv4 address (inet_pton(..., AF_INET)) */
 367         PLRT_IPV6,              /* Offset points to a IPv6 address (inet_pton(..., AF_INET6)) */
 368         PLRT_END                /* End of rules */
 369 };
 370
 371 struct pl_rule
 372 {
 373         const char              *title;
 374         unsigned int            type;
 375         unsigned int            offset;
 376 };
 377
 378
 379 struct tlssocket
 380 {
 381         SOCKET                  socket;
 382 #ifdef AICCU_GNUTLS
 383         bool                    tls_active;     /* TLS active? */
 384         gnutls_session          session;        /* The GnuTLS sesision */
 385 #endif
 386 };
 387
 388 typedef struct tlssocket * TLSSOCKET;
 389
 390 /* Common Functions */
 391 void dologA(int level, const char *fmt, va_list ap);
 392 void dolog(int level, const char *fmt, ...);
 393
 394 #ifdef _AIX
 395 void vsyslog(int priority, const char *format, va_list ap);
 396 #endif
 397
 398 /* Networking functions */
 399 void sock_printf(TLSSOCKET sock, const char *fmt, ...);
 400 int sock_getline(TLSSOCKET sock, char *rbuf, unsigned int rbuflen, unsigned int *filled, char *ubuf, unsigned int ubuflen);
 401 TLSSOCKET connect_client(const char *hostname, const char *service, int family, int socktype);
 402 TLSSOCKET listen_server(const char *description, const char *hostname, const char *service, int family, int socktype);
 403 void sock_free(TLSSOCKET sock);
 404 #ifdef AICCU_GNUTLS
 405 bool sock_gotls(TLSSOCKET sock);
 406 #endif
 407
 408 /* Parsing functions */
 409 unsigned int countfields(char *s);
 410 bool copyfield(char *s, unsigned int n, char *buf, unsigned int buflen);
 411 bool parseline(char *line, const char *split, struct pl_rule *rules, void *data);
 412
 413 /* Convienience */
 414 void MD5String(const char *sString, char *sSignature, unsigned int siglen);
 415 bool is_rfc1918(char *ipv4);
 416
 417 #endif /* AICCU_COMMON_H */