Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | // Copyright (C) 2006-2010 David Sugar, Tycho Softworks |
| 2 | // |
| 3 | // This program is free software; you can redistribute it and/or modify |
| 4 | // it under the terms of the GNU General Public License as published by |
| 5 | // the Free Software Foundation; either version 2 of the License, or |
| 6 | // (at your option) any later version. |
| 7 | // |
| 8 | // This program is distributed in the hope that it will be useful, |
| 9 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | // GNU General Public License for more details. |
| 12 | // |
| 13 | // You should have received a copy of the GNU General Public License |
| 14 | // along with this program; if not, write to the Free Software |
| 15 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 16 | // |
| 17 | // As a special exception, you may use this file as part of a free software |
| 18 | // library without restriction. Specifically, if other files instantiate |
| 19 | // templates or use macros or inline functions from this file, or you compile |
| 20 | // this file and link it with other files to produce an executable, this |
| 21 | // file does not by itself cause the resulting executable to be covered by |
| 22 | // the GNU General Public License. This exception does not however |
| 23 | // invalidate any other reasons why the executable file might be covered by |
| 24 | // the GNU General Public License. |
| 25 | // |
| 26 | // This exception applies only to the code released under the name GNU |
| 27 | // Common C++. If you copy code from other releases into a copy of GNU |
| 28 | // Common C++, as the General Public License permits, the exception does |
| 29 | // not apply to the code that you add in this way. To avoid misleading |
| 30 | // anyone as to the status of such modified files, you must delete |
| 31 | // this exception notice from them. |
| 32 | // |
| 33 | // If you write modifications of your own for GNU Common C++, it is your choice |
| 34 | // whether to permit this exception to apply to your modifications. |
| 35 | // If you do not wish that, delete this exception notice. |
| 36 | // |
| 37 | |
| 38 | #include <cc++/config.h> |
| 39 | #include <cc++/export.h> |
| 40 | #include <cc++/address.h> |
| 41 | #include "private.h" |
| 42 | #include <cstdlib> |
| 43 | #include <fcntl.h> |
| 44 | #include <cstdio> |
| 45 | |
| 46 | |
| 47 | #ifdef CCXX_NAMESPACES |
| 48 | namespace ost { |
| 49 | #endif |
| 50 | |
| 51 | typedef unsigned char bit_t; |
| 52 | |
| 53 | static void bitmask(bit_t *bits, bit_t *mask, unsigned len) |
| 54 | { |
| 55 | while(len--) |
| 56 | *(bits++) &= *(mask++); |
| 57 | } |
| 58 | |
| 59 | static void bitimask(bit_t *bits, bit_t *mask, unsigned len) |
| 60 | { |
| 61 | while(len--) |
| 62 | *(bits++) |= ~(*(mask++)); |
| 63 | } |
| 64 | |
| 65 | static void bitset(bit_t *bits, unsigned blen) |
| 66 | { |
| 67 | bit_t mask; |
| 68 | |
| 69 | while(blen) { |
| 70 | mask = (bit_t)(1 << 7); |
| 71 | while(mask && blen) { |
| 72 | *bits |= mask; |
| 73 | mask >>= 1; |
| 74 | --blen; |
| 75 | } |
| 76 | ++bits; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static unsigned bitcount(bit_t *bits, unsigned len) |
| 81 | { |
| 82 | unsigned count = 0; |
| 83 | bit_t mask, test; |
| 84 | |
| 85 | while(len--) { |
| 86 | mask = (bit_t)(1<<7); |
| 87 | test = *bits++; |
| 88 | while(mask) { |
| 89 | if(!(mask & test)) |
| 90 | return count; |
| 91 | ++count; |
| 92 | mask >>= 1; |
| 93 | } |
| 94 | } |
| 95 | return count; |
| 96 | } |
| 97 | |
| 98 | IPV4Cidr::IPV4Cidr() |
| 99 | { |
| 100 | memset(&network, 0, sizeof(network)); |
| 101 | memset(&netmask, 0, sizeof(netmask)); |
| 102 | } |
| 103 | |
| 104 | IPV4Cidr::IPV4Cidr(const char *cp) |
| 105 | { |
| 106 | set(cp); |
| 107 | } |
| 108 | |
| 109 | IPV4Cidr::IPV4Cidr(IPV4Cidr &cidr) |
| 110 | { |
| 111 | memcpy(&network, &cidr.network, sizeof(network)); |
| 112 | memcpy(&netmask, &cidr.netmask, sizeof(netmask)); |
| 113 | } |
| 114 | |
| 115 | bool IPV4Cidr::isMember(const struct in_addr &addr) const |
| 116 | { |
| 117 | struct in_addr host = addr; |
| 118 | |
| 119 | bitmask((bit_t *)&host, (bit_t *)&netmask, sizeof(host)); |
| 120 | if(!memcmp(&host, &network, sizeof(host))) |
| 121 | return true; |
| 122 | |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | bool IPV4Cidr::isMember(const struct sockaddr *saddr) const |
| 127 | { |
| 128 | struct sockaddr_in *addr = (struct sockaddr_in *)saddr; |
| 129 | struct in_addr host; |
| 130 | |
| 131 | if(saddr->sa_family != AF_INET) |
| 132 | return false; |
| 133 | |
| 134 | memcpy(&host, &addr->sin_addr.s_addr, sizeof(host)); |
| 135 | bitmask((bit_t *)&host, (bit_t *)&netmask, sizeof(host)); |
| 136 | if(!memcmp(&host, &network, sizeof(host))) |
| 137 | return true; |
| 138 | |
| 139 | return false; |
| 140 | } |
| 141 | |
| 142 | struct in_addr IPV4Cidr::getBroadcast(void) const |
| 143 | { |
| 144 | struct in_addr bcast; |
| 145 | memcpy(&bcast, &network, sizeof(network)); |
| 146 | bitimask((bit_t *)&bcast, (bit_t *)&netmask, sizeof(bcast)); |
| 147 | return bcast; |
| 148 | } |
| 149 | |
| 150 | unsigned IPV4Cidr::getMask(const char *cp) const |
| 151 | { |
| 152 | unsigned dcount = 0; |
| 153 | const char *gp = cp; |
| 154 | const char *mp = strchr(cp, '/'); |
| 155 | unsigned char dots[4]; |
| 156 | #ifdef WIN32 |
| 157 | DWORD mask; |
| 158 | #else |
| 159 | uint32 mask; |
| 160 | #endif |
| 161 | |
| 162 | if(mp) { |
| 163 | if(!strchr(++mp, '.')) |
| 164 | return atoi(mp); |
| 165 | |
| 166 | mask = inet_addr(mp); |
| 167 | return bitcount((bit_t *)&mask, sizeof(mask)); |
| 168 | } |
| 169 | |
| 170 | memset(dots, 0, sizeof(dots)); |
| 171 | dots[0] = atoi(cp); |
| 172 | while(*gp && dcount < 3) { |
| 173 | if(*(gp++) == '.') |
| 174 | dots[++dcount] = atoi(gp); |
| 175 | } |
| 176 | |
| 177 | if(dots[3]) |
| 178 | return 32; |
| 179 | |
| 180 | if(dots[2]) |
| 181 | return 24; |
| 182 | |
| 183 | if(dots[1]) |
| 184 | return 16; |
| 185 | |
| 186 | return 8; |
| 187 | } |
| 188 | |
| 189 | void IPV4Cidr::set(const char *cp) |
| 190 | { |
| 191 | char cbuf[INET_IPV4_ADDRESS_SIZE]; |
| 192 | char *ep; |
| 193 | unsigned dots = 0; |
| 194 | #ifdef WIN32 |
| 195 | DWORD addr; |
| 196 | #endif |
| 197 | |
| 198 | memset(&netmask, 0, sizeof(netmask)); |
| 199 | bitset((bit_t *)&netmask, getMask(cp)); |
| 200 | setString(cbuf, sizeof(cbuf), cp); |
| 201 | |
| 202 | ep = (char *)strchr(cp, '/'); |
| 203 | |
| 204 | if(ep) |
| 205 | *ep = 0; |
| 206 | |
| 207 | cp = cbuf; |
| 208 | while(NULL != (cp = strchr(cp, '.'))) { |
| 209 | ++dots; |
| 210 | ++cp; |
| 211 | } |
| 212 | |
| 213 | while(dots++ < 3) |
| 214 | addString(cbuf, sizeof(cbuf), ".0"); |
| 215 | |
| 216 | #ifdef WIN32 |
| 217 | addr = inet_addr(cbuf); |
| 218 | memcpy(&network, &addr, sizeof(network)); |
| 219 | #else |
| 220 | inet_aton(cbuf, &network); |
| 221 | #endif |
| 222 | bitmask((bit_t *)&network, (bit_t *)&netmask, sizeof(network)); |
| 223 | } |
| 224 | |
| 225 | |
| 226 | |
| 227 | |
| 228 | #ifdef CCXX_IPV6 |
| 229 | |
| 230 | IPV6Cidr::IPV6Cidr() |
| 231 | { |
| 232 | memset(&network, 0, sizeof(network)); |
| 233 | memset(&netmask, 0, sizeof(netmask)); |
| 234 | } |
| 235 | |
| 236 | IPV6Cidr::IPV6Cidr(const char *cp) |
| 237 | { |
| 238 | set(cp); |
| 239 | } |
| 240 | |
| 241 | IPV6Cidr::IPV6Cidr(IPV6Cidr &cidr) |
| 242 | { |
| 243 | memcpy(&network, &cidr.network, sizeof(network)); |
| 244 | memcpy(&netmask, &cidr.netmask, sizeof(netmask)); |
| 245 | } |
| 246 | |
| 247 | bool IPV6Cidr::isMember(const struct in6_addr &addr) const |
| 248 | { |
| 249 | struct in6_addr host = addr; |
| 250 | |
| 251 | bitmask((bit_t *)&host, (bit_t *)&netmask, sizeof(host)); |
| 252 | if(!memcmp(&host, &network, sizeof(host))) |
| 253 | return true; |
| 254 | |
| 255 | return false; |
| 256 | } |
| 257 | |
| 258 | bool IPV6Cidr::isMember(const struct sockaddr *saddr) const |
| 259 | { |
| 260 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *)saddr; |
| 261 | struct in6_addr host; |
| 262 | |
| 263 | if(saddr->sa_family != AF_INET6) |
| 264 | return false; |
| 265 | |
| 266 | memcpy(&host, &addr->sin6_addr, sizeof(host)); |
| 267 | bitmask((bit_t *)&host, (bit_t *)&netmask, sizeof(host)); |
| 268 | if(!memcmp(&host, &network, sizeof(host))) |
| 269 | return true; |
| 270 | |
| 271 | return false; |
| 272 | } |
| 273 | |
| 274 | struct in6_addr IPV6Cidr::getBroadcast(void) const |
| 275 | { |
| 276 | struct in6_addr bcast; |
| 277 | memcpy(&bcast, &network, sizeof(network)); |
| 278 | bitimask((bit_t *)&bcast, (bit_t *)&netmask, sizeof(bcast)); |
| 279 | return bcast; |
| 280 | } |
| 281 | |
| 282 | unsigned IPV6Cidr::getMask(const char *cp) const |
| 283 | { |
| 284 | unsigned count = 0, rcount = 0; |
| 285 | const char *sp = strchr(cp, '/'); |
| 286 | int flag = 0; |
| 287 | |
| 288 | if(sp) |
| 289 | return atoi(++sp); |
| 290 | |
| 291 | if(!strncmp(cp, "ff00:", 5)) |
| 292 | return 8; |
| 293 | |
| 294 | if(!strncmp(cp, "fe80:", 5)) |
| 295 | return 10; |
| 296 | |
| 297 | if(!strncmp(cp, "2002:", 5)) |
| 298 | return 16; |
| 299 | |
| 300 | sp = strrchr(cp, ':'); |
| 301 | while(*(++sp) == '0') |
| 302 | ++sp; |
| 303 | if(*sp) |
| 304 | return 128; |
| 305 | |
| 306 | while(*cp && count < 128) { |
| 307 | if(*(cp++) == ':') { |
| 308 | count+= 16; |
| 309 | while(*cp == '0') |
| 310 | ++cp; |
| 311 | if(*cp == ':') { |
| 312 | if(!flag) |
| 313 | rcount = count; |
| 314 | flag = 1; |
| 315 | } |
| 316 | else |
| 317 | flag = 0; |
| 318 | } |
| 319 | } |
| 320 | return rcount; |
| 321 | } |
| 322 | |
| 323 | void IPV6Cidr::set(const char *cp) |
| 324 | { |
| 325 | char cbuf[INET_IPV6_ADDRESS_SIZE]; |
| 326 | char *ep; |
| 327 | |
| 328 | memset(&netmask, 0, sizeof(netmask)); |
| 329 | bitset((bit_t *)&netmask, getMask(cp)); |
| 330 | setString(cbuf, sizeof(cbuf), cp); |
| 331 | ep = (char *)strchr(cp, '/'); |
| 332 | if(ep) |
| 333 | *ep = 0; |
| 334 | |
| 335 | inet_pton(AF_INET6, cbuf, &network); |
| 336 | bitmask((bit_t *)&network, (bit_t *)&netmask, sizeof(network)); |
| 337 | } |
| 338 | |
| 339 | #endif |
| 340 | |
| 341 | #ifdef CCXX_NAMESPACES |
| 342 | } |
| 343 | #endif |
| 344 | |
| 345 | /** EMACS ** |
| 346 | * Local variables: |
| 347 | * mode: c++ |
| 348 | * c-basic-offset: 4 |
| 349 | * End: |
| 350 | */ |