sl@0: /* ARPA.C
sl@0: *
sl@0: * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: */
sl@0:
sl@0: /*
sl@0: * Implementation of the ARPA/INET.H functions, based on FreeBSD.
sl@0: */
sl@0:
sl@0: /*
sl@0: * Copyright (c) 1983, 1993
sl@0: * The Regents of the University of California. All rights reserved.
sl@0: *
sl@0: * Redistribution and use in source and binary forms, with or without
sl@0: * modification, are permitted provided that the following conditions
sl@0: * are met:
sl@0: * 1. Redistributions of source code must retain the above copyright
sl@0: * notice, this list of conditions and the following disclaimer.
sl@0: * 2. Redistributions in binary form must reproduce the above copyright
sl@0: * notice, this list of conditions and the following disclaimer in the
sl@0: * documentation and/or other materials provided with the distribution.
sl@0: * 3. All advertising materials mentioning features or use of this software
sl@0: * must display the following acknowledgement:
sl@0: * This product includes software developed by the University of
sl@0: * California, Berkeley and its contributors.
sl@0: * 4. Neither the name of the University nor the names of its contributors
sl@0: * may be used to endorse or promote products derived from this software
sl@0: * without specific prior written permission.
sl@0: *
sl@0: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0: * SUCH DAMAGE.
sl@0: * Portions Copyright (c) 1993 by Digital Equipment Corporation.
sl@0: *
sl@0: * Permission to use, copy, modify, and distribute this software for any
sl@0: * purpose with or without fee is hereby granted, provided that the above
sl@0: * copyright notice and this permission notice appear in all copies, and that
sl@0: * the name of Digital Equipment Corporation not be used in advertising or
sl@0: * publicity pertaining to distribution of the document or software without
sl@0: * specific, written prior permission.
sl@0: *
sl@0: * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
sl@0: * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
sl@0: * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
sl@0: * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
sl@0: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
sl@0: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
sl@0: * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
sl@0: * SOFTWARE.
sl@0: * -
sl@0: * --Copyright--
sl@0: */
sl@0:
sl@0: #include <stdio_r.h>
sl@0: #include <netdb_r.h>
sl@0: #include <ctype.h>
sl@0: #include <sys/types.h>
sl@0: #include <libc/netinet/in.h>
sl@0: #include <libc/arpa/inet.h>
sl@0:
sl@0:
sl@0: /**
sl@0: Ascii internet address interpretation routine.
sl@0: @return The value returned is in network order.
sl@0: @param cp ascii representation of an Internet address
sl@0: */
sl@0: EXPORT_C unsigned long inet_addr(const char *cp)
sl@0: {
sl@0: struct in_addr val;
sl@0:
sl@0: if (inet_aton(cp, &val))
sl@0: return (val.s_addr);
sl@0: return (INADDR_NONE);
sl@0: }
sl@0:
sl@0: /**
sl@0: Check whether "cp" is a valid ascii representation
sl@0: of an Internet address and convert to a binary address.
sl@0: This replaces inet_addr, the return value from which
sl@0: cannot distinguish between failure and a local broadcast address.
sl@0: @return 1 if the address is valid, 0 if not.
sl@0: @param cp ascii representation of an Internet address
sl@0: @param addr internet address
sl@0: */
sl@0: EXPORT_C int inet_aton(const char* cp, struct in_addr* addr)
sl@0: {
sl@0: unsigned long val;
sl@0: int base, n;
sl@0: char c;
sl@0: unsigned int parts[4];
sl@0: unsigned int *pp = parts;
sl@0:
sl@0: c = *cp;
sl@0: for (;;) {
sl@0: /*
sl@0: * Collect number up to ``.''.
sl@0: * Values are specified as for C:
sl@0: * 0x=hex, 0=octal, isdigit=decimal.
sl@0: */
sl@0: if (!isdigit(c))
sl@0: return (0);
sl@0: val = 0; base = 10;
sl@0: if (c == '0') {
sl@0: c = *++cp;
sl@0: if (c == 'x' || c == 'X')
sl@0: base = 16, c = *++cp;
sl@0: else
sl@0: base = 8;
sl@0: }
sl@0: for (;;) {
sl@0: if (isascii(c) && isdigit(c)) {
sl@0: val = (val * base) + (c - '0');
sl@0: c = *++cp;
sl@0: } else if (base == 16 && isascii(c) && isxdigit(c)) {
sl@0: val = (val << 4) |
sl@0: (c + 10 - (islower(c) ? 'a' : 'A'));
sl@0: c = *++cp;
sl@0: } else
sl@0: break;
sl@0: }
sl@0: if (c == '.') {
sl@0: /*
sl@0: * Internet format:
sl@0: * a.b.c.d
sl@0: * a.b.c (with c treated as 16 bits)
sl@0: * a.b (with b treated as 24 bits)
sl@0: */
sl@0: if (pp >= parts + 3)
sl@0: return (0);
sl@0: if (val > 0xff) /* Check 8-bit a, b, c */
sl@0: return (0);
sl@0: *pp++ = val;
sl@0: c = *++cp;
sl@0: } else
sl@0: break;
sl@0: }
sl@0: /*
sl@0: * Check for trailing characters.
sl@0: */
sl@0: if (c != '\0' && (!isascii(c) || !isspace(c)))
sl@0: return (0);
sl@0: /*
sl@0: * Concoct the address according to
sl@0: * the number of parts specified.
sl@0: */
sl@0: n = pp - parts + 1;
sl@0: switch (n) {
sl@0:
sl@0: case 0:
sl@0: return (0); /* initial nondigit */
sl@0:
sl@0: case 1: /* a -- 32 bits */
sl@0: break;
sl@0:
sl@0: case 2: /* a.b -- 8.24 bits */
sl@0: if (val > 0xffffff)
sl@0: return (0);
sl@0: val |= parts[0] << 24;
sl@0: break;
sl@0:
sl@0: case 3: /* a.b.c -- 8.8.16 bits */
sl@0: if (val > 0xffff)
sl@0: return (0);
sl@0: val |= (parts[0] << 24) | (parts[1] << 16);
sl@0: break;
sl@0:
sl@0: case 4: /* a.b.c.d -- 8.8.8.8 bits */
sl@0: if (val > 0xff)
sl@0: return (0);
sl@0: val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
sl@0: break;
sl@0: }
sl@0: if (addr)
sl@0: addr->s_addr = htonl(val);
sl@0: return (1);
sl@0: }
sl@0:
sl@0: /*
sl@0: * Convert network-format internet address
sl@0: * to base 256 d.d.d.d representation.
sl@0: */
sl@0: EXPORT_C char* _inet_ntoa_r(struct _reent* rp, struct in_addr in)
sl@0: {
sl@0: unsigned char* p = (unsigned char *)∈
sl@0: _sprintf_r(rp, rp->_tmpnam, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
sl@0: return rp->_tmpnam;
sl@0: }
sl@0:
sl@0: #ifndef _REENT_ONLY
sl@0:
sl@0: EXPORT_C char* inet_ntoa(struct in_addr in)
sl@0: {
sl@0: return _inet_ntoa_r(_REENT,in);
sl@0: }
sl@0:
sl@0: #endif /* _REENT_ONLY */
sl@0:
sl@0: /**
sl@0: Return the local network address portion of an
sl@0: internet address; handles class a/b/c network
sl@0: number formats.
sl@0: @return the local network address portion of an
sl@0: internet address
sl@0: @param in
sl@0: */
sl@0: EXPORT_C unsigned long inet_lnaof(struct in_addr in)
sl@0: {
sl@0: register unsigned long i = ntohl(in.s_addr);
sl@0:
sl@0: if (IN_CLASSA(i))
sl@0: return ((i)&IN_CLASSA_HOST);
sl@0: else if (IN_CLASSB(i))
sl@0: return ((i)&IN_CLASSB_HOST);
sl@0: else
sl@0: return ((i)&IN_CLASSC_HOST);
sl@0: }
sl@0:
sl@0: /**
sl@0: @return the network number from an internet
sl@0: address; handles class a/b/c network #'s.
sl@0: @param in
sl@0: */
sl@0: EXPORT_C unsigned long inet_netof(struct in_addr in)
sl@0: {
sl@0: unsigned long i = ntohl(in.s_addr);
sl@0:
sl@0: if (IN_CLASSA(i))
sl@0: return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
sl@0: else if (IN_CLASSB(i))
sl@0: return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
sl@0: else
sl@0: return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
sl@0: }
sl@0:
sl@0: /** Formulate an Internet address from network + host.
sl@0: */
sl@0: EXPORT_C struct in_addr inet_makeaddr(unsigned long net, unsigned long host)
sl@0: {
sl@0: unsigned long addr;
sl@0:
sl@0: if (net < IN_CLASSA_MAX)
sl@0: addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
sl@0: else if (net < IN_CLASSB_MAX)
sl@0: addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
sl@0: else if (net < IN_CLASSC_MAX)
sl@0: addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
sl@0: else
sl@0: addr = net | host;
sl@0: addr = htonl(addr);
sl@0: return (*(struct in_addr *)&addr);
sl@0: }
sl@0: