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Annotation of embedaddon/ntp/lib/isc/netscope.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
                      3:  * Copyright (C) 2002  Internet Software Consortium.
                      4:  *
                      5:  * Permission to use, copy, modify, and/or distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
                     10:  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
                     11:  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
                     12:  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
                     13:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
                     14:  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
                     15:  * PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17: 
                     18: /*! \file */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char rcsid[] =
                     22:        "$Id: netscope.c,v 1.13 2007/06/19 23:47:17 tbox Exp $";
                     23: #endif /* LIBC_SCCS and not lint */
                     24: 
                     25: #include <config.h>
                     26: 
                     27: #include <isc/string.h>
                     28: #include <isc/net.h>
                     29: #include <isc/netscope.h>
                     30: #include <isc/result.h>
                     31: 
                     32: isc_result_t
                     33: isc_netscope_pton(int af, char *scopename, void *addr, isc_uint32_t *zoneid) {
                     34:        char *ep;
                     35: #ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
                     36:        unsigned int ifid;
                     37: #endif
                     38:        struct in6_addr *in6;
                     39:        isc_uint32_t zone;
                     40:        isc_uint64_t llz;
                     41: 
                     42:        /* at this moment, we only support AF_INET6 */
                     43:        if (af != AF_INET6)
                     44:                return (ISC_R_FAILURE);
                     45: 
                     46:        in6 = (struct in6_addr *)addr;
                     47: 
                     48:        /*
                     49:         * Basically, "names" are more stable than numeric IDs in terms of
                     50:         * renumbering, and are more preferred.  However, since there is no
                     51:         * standard naming convention and APIs to deal with the names.  Thus,
                     52:         * we only handle the case of link-local addresses, for which we use
                     53:         * interface names as link names, assuming one to one mapping between
                     54:         * interfaces and links.
                     55:         */
                     56: #ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
                     57:        if (IN6_IS_ADDR_LINKLOCAL(in6) &&
                     58:            (ifid = if_nametoindex((const char *)scopename)) != 0)
                     59:                zone = (isc_uint32_t)ifid;
                     60:        else {
                     61: #endif
                     62:                llz = isc_string_touint64(scopename, &ep, 10);
                     63:                if (ep == scopename)
                     64:                        return (ISC_R_FAILURE);
                     65: 
                     66:                /* check overflow */
                     67:                zone = (isc_uint32_t)(llz & 0xffffffffUL);
                     68:                if (zone != llz)
                     69:                        return (ISC_R_FAILURE);
                     70: #ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
                     71:        }
                     72: #endif
                     73: 
                     74:        *zoneid = zone;
                     75:        return (ISC_R_SUCCESS);
                     76: }