/* * 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)