Return to inet_network.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / net

Annotation of 43BSDReno/lib/libc/net/inet_network.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #if defined(LIBC_SCCS) && !defined(lint)
        !            21: static char sccsid[] = "@(#)inet_network.c     5.6 (Berkeley) 6/1/90";
        !            22: #endif /* LIBC_SCCS and not lint */
        !            23: 
        !            24: #include <sys/types.h>
        !            25: #include <netinet/in.h>
        !            26: #include <ctype.h>
        !            27: 
        !            28: /*
        !            29:  * Internet network address interpretation routine.
        !            30:  * The library routines call this routine to interpret
        !            31:  * network numbers.
        !            32:  */
        !            33: u_long
        !            34: inet_network(cp)
        !            35:        register char *cp;
        !            36: {
        !            37:        register u_long val, base, n;
        !            38:        register char c;
        !            39:        u_long parts[4], *pp = parts;
        !            40:        register int i;
        !            41: 
        !            42: again:
        !            43:        val = 0; base = 10;
        !            44:        if (*cp == '0')
        !            45:                base = 8, cp++;
        !            46:        if (*cp == 'x' || *cp == 'X')
        !            47:                base = 16, cp++;
        !            48:        while (c = *cp) {
        !            49:                if (isdigit(c)) {
        !            50:                        val = (val * base) + (c - '0');
        !            51:                        cp++;
        !            52:                        continue;
        !            53:                }
        !            54:                if (base == 16 && isxdigit(c)) {
        !            55:                        val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
        !            56:                        cp++;
        !            57:                        continue;
        !            58:                }
        !            59:                break;
        !            60:        }
        !            61:        if (*cp == '.') {
        !            62:                if (pp >= parts + 4)
        !            63:                        return (INADDR_NONE);
        !            64:                *pp++ = val, cp++;
        !            65:                goto again;
        !            66:        }
        !            67:        if (*cp && !isspace(*cp))
        !            68:                return (INADDR_NONE);
        !            69:        *pp++ = val;
        !            70:        n = pp - parts;
        !            71:        if (n > 4)
        !            72:                return (INADDR_NONE);
        !            73:        for (val = 0, i = 0; i < n; i++) {
        !            74:                val <<= 8;
        !            75:                val |= parts[i] & 0xff;
        !            76:        }
        !            77:        return (val);
        !            78: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.