/* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <ctype.h> #include <netinet/in.h> /* * Internet network address interpretation routine. * The library routines call this routine to interpret * network numbers. */ u_int32_t inet_network(const char *cp) { register u_long val, base, n; register char c; u_long parts[4], *pp = parts; register int i; again: /* * Collect number up to ``.''. * Values are specified as for C: * 0x=hex, 0=octal, other=decimal. */ val = 0; base = 10; /* * The 4.4BSD version of this file also accepts 'x__' as a hexa * number. I don't think this is correct. -- Uli */ if (*cp == '0') { if (*++cp == 'x' || *cp == 'X') base = 16, cp++; else base = 8; } while ((c = *cp)) { if (isdigit(c)) { val = (val * base) + (c - '0'); cp++; continue; } if (base == 16 && isxdigit(c)) { val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); cp++; continue; } break; } if (*cp == '.') { if (pp >= parts + 4) return (INADDR_NONE); *pp++ = val, cp++; goto again; } if (*cp && !isspace(*cp)) return (INADDR_NONE); *pp++ = val; n = pp - parts; if (n > 4) return (INADDR_NONE); for (val = 0, i = 0; i < n; i++) { val <<= 8; val |= parts[i] & 0xff; } return (val); }