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/* $OpenBSD: inet_network.c,v 1.13 2015/10/22 23:55:51 mmcc Exp $ */ |
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/* |
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* Copyright (c) 1983, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/types.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <ctype.h> |
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/* |
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* Internet network address interpretation routine. |
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* The library routines call this routine to interpret |
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* network numbers. |
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*/ |
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in_addr_t |
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inet_network(const char *cp) |
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{ |
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in_addr_t val, base, n; |
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u_char c; |
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in_addr_t parts[4], *pp = parts; |
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int i; |
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again: |
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val = 0; base = 10; |
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if (*cp == '0') |
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base = 8, cp++; |
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if (*cp == 'x' || *cp == 'X') |
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base = 16, cp++; |
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while ((c = *cp)) { |
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if (isdigit(c)) { |
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val = (val * base) + (c - '0'); |
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cp++; |
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continue; |
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} |
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if (base == 16 && isxdigit(c)) { |
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val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); |
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cp++; |
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continue; |
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} |
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break; |
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} |
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if (*cp == '.') { |
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if (pp >= parts + 3) |
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return (INADDR_NONE); |
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*pp++ = val, cp++; |
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goto again; |
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} |
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if (*cp && !isspace((unsigned char)*cp)) |
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return (INADDR_NONE); |
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*pp++ = val; |
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n = pp - parts; |
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for (val = 0, i = 0; i < 4; i++) { |
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val <<= 8; |
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if (i < n) |
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val |= parts[i] & 0xff; |
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} |
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return (val); |
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} |
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DEF_WEAK(inet_network); |