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Annotation of src/lib/libc/inet/nsap_addr.c, Revision 1.5.6.2

1.5.6.2 ! christos    1: /*     $NetBSD: nsap_addr.c,v 1.5 2008/06/21 20:41:48 christos Exp $   */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
        !             5:  * Copyright (c) 1996-1999 by Internet Software Consortium.
        !             6:  *
        !             7:  * Permission to use, copy, modify, and distribute this software for any
        !             8:  * purpose with or without fee is hereby granted, provided that the above
        !             9:  * copyright notice and this permission notice appear in all copies.
        !            10:  *
        !            11:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
        !            12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            13:  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
        !            14:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            15:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            16:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
        !            17:  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            18:  */
        !            19:
        !            20: #include <sys/cdefs.h>
        !            21: #if defined(LIBC_SCCS) && !defined(lint)
        !            22: #if 0
        !            23: static const char rcsid[] = "Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp";
        !            24: #else
        !            25: __RCSID("$NetBSD: nsap_addr.c,v 1.5 2008/06/21 20:41:48 christos Exp $");
        !            26: #endif
        !            27: #endif /* LIBC_SCCS and not lint */
        !            28:
        !            29: #include "port_before.h"
        !            30:
        !            31: #include "namespace.h"
        !            32: #include <sys/types.h>
        !            33: #include <sys/param.h>
        !            34: #include <sys/socket.h>
        !            35:
        !            36: #include <netinet/in.h>
        !            37: #include <arpa/inet.h>
        !            38: #include <arpa/nameser.h>
        !            39:
        !            40: #include <assert.h>
        !            41: #include <ctype.h>
        !            42: #include <resolv.h>
        !            43: #include <resolv_mt.h>
        !            44:
        !            45: #include "port_after.h"
        !            46:
        !            47: #ifdef __weak_alias
        !            48: __weak_alias(inet_nsap_addr,_inet_nsap_addr)
        !            49: __weak_alias(inet_nsap_ntoa,_inet_nsap_ntoa)
        !            50: #endif
        !            51:
        !            52: static char
        !            53: xtob(int c) {
        !            54:        return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
        !            55: }
        !            56:
        !            57: u_int
        !            58: inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
        !            59:        u_char c, nib;
        !            60:        u_int len = 0;
        !            61:
        !            62:        _DIAGASSERT(ascii != NULL);
        !            63:        _DIAGASSERT(binary != NULL);
        !            64:
        !            65:        if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
        !            66:                return (0);
        !            67:        ascii += 2;
        !            68:
        !            69:        while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
        !            70:                if (c == '.' || c == '+' || c == '/')
        !            71:                        continue;
        !            72:                if (!isascii(c))
        !            73:                        return (0);
        !            74:                if (islower(c))
        !            75:                        c = toupper(c);
        !            76:                if (isxdigit(c)) {
        !            77:                        nib = xtob(c);
        !            78:                        c = *ascii++;
        !            79:                        if (c != '\0') {
        !            80:                                c = toupper(c);
        !            81:                                if (isxdigit(c)) {
        !            82:                                        *binary++ = (nib << 4) | xtob(c);
        !            83:                                        len++;
        !            84:                                } else
        !            85:                                        return (0);
        !            86:                        }
        !            87:                        else
        !            88:                                return (0);
        !            89:                }
        !            90:                else
        !            91:                        return (0);
        !            92:        }
        !            93:        return (len);
        !            94: }
        !            95:
        !            96: char *
        !            97: inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
        !            98:        int nib;
        !            99:        int i;
        !           100:        char *tmpbuf = inet_nsap_ntoa_tmpbuf;
        !           101:        char *start;
        !           102:
        !           103:        _DIAGASSERT(binary != NULL);
        !           104:
        !           105:        if (ascii)
        !           106:                start = ascii;
        !           107:        else {
        !           108:                ascii = tmpbuf;
        !           109:                start = tmpbuf;
        !           110:        }
        !           111:
        !           112:        *ascii++ = '0';
        !           113:        *ascii++ = 'x';
        !           114:
        !           115:        if (binlen > 255)
        !           116:                binlen = 255;
        !           117:
        !           118:        for (i = 0; i < binlen; i++) {
        !           119:                nib = (u_int32_t)*binary >> 4;
        !           120:                *ascii++ = nib + (nib < 10 ? '0' : '7');
        !           121:                nib = *binary++ & 0x0f;
        !           122:                *ascii++ = nib + (nib < 10 ? '0' : '7');
        !           123:                if (((i % 2) == 0 && (i + 1) < binlen))
        !           124:                        *ascii++ = '.';
        !           125:        }
        !           126:        *ascii = '\0';
        !           127:        return (start);
        !           128: }
        !           129:
        !           130: /*! \file */

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