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- /*
- * 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>
- #include <arpa/inet.h>
- /*
- * Internet network address interpretation routine.
- * The library routines call this routine to interpret
- * network numbers.
- */
- in_addr_t
- inet_network(const char *cp)
- {
- u_char c;
- int got_data;
- u_int base, dots;
- in_addr_t res, val;
- res = 0;
- dots = 0;
- again:
- val = 0;
- got_data = 0;
- if (*cp == '0') {
- cp++;
- if (*cp == 'x' || *cp == 'X') {
- cp++;
- base = 16;
- } else {
- base = 8;
- got_data = 1;
- }
- } else
- base = 10;
- while ((c = *cp) != '\0') {
- if (isdigit(c)) {
- if (base == 8 && c > '7')
- return (INADDR_NONE);
- val = val * base + c - '0';
- } else if (base == 16 && isxdigit(c))
- val = (val << 4) + 10 - (islower(c) ? 'a' : 'A');
- else
- break;
- if (val > 0xff)
- return (INADDR_NONE);
- cp++;
- got_data = 1;
- }
- if (!got_data)
- return (INADDR_NONE);
- if (dots != 0)
- res <<= 8;
- res |= val;
- if (c == '.') {
- if (++dots == 4)
- return (INADDR_NONE);
- cp++;
- goto again;
- }
- if (c != '\0')
- return (INADDR_NONE);
- return (res);
- }
- libc_hidden_def(inet_network)
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