addr/addr_from_str.c

Go to the documentation of this file.
00001 // Copyright 2006 Benedikt Böhm <hollow@gentoo.org>
00002 //
00003 // This program is free software; you can redistribute it and/or modify
00004 // it under the terms of the GNU General Public License as published by
00005 // the Free Software Foundation; either version 2 of the License, or
00006 // (at your option) any later version.
00007 //
00008 // This program is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011 // GNU General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this program; if not, write to the
00015 // Free Software Foundation, Inc.,
00016 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00017 
00018 #include "addr.h"
00019 #include "scanf.h"
00020 #include "str.h"
00021 
00022 int addr_from_str(const char *str, uint32_t *ip, uint32_t *mask)
00023 {
00024         int rc = 0;
00025         unsigned long long int cidr;
00026         
00027         union {
00028                 uint8_t  b[4];
00029                 uint32_t l;
00030         } u;
00031         
00032         const char *p = str_index(str, '/', str_len(str));
00033         
00034         if (ip && (!p || p - str > 0)) {
00035                 if (_lucid_sscanf(str, "%hhu.%hhu.%hhu.%hhu",
00036                                   &u.b[0], &u.b[1], &u.b[2], &u.b[3]) == 4) {
00037                         *ip = addr_hton(u.l);
00038                         rc = 1;
00039                 }
00040         }
00041         
00042         if (!p || !mask)
00043                 return rc;
00044         
00045         p++;
00046         
00047         /* CIDR notation */
00048         if (!str_isempty(p) && str_isdigit(p)) {
00049                 str_toumax(p, &cidr, 10, str_len(p));
00050                 
00051                 if (cidr > 0 && cidr <= 32) {
00052                         *mask = 0xffffffff & ~((1 << (32 - cidr)) - 1);
00053                         rc   += 2;
00054                 }
00055         }
00056         
00057         if (!str_isempty(p)) {
00058                 if (_lucid_sscanf(p, "%hhu.%hhu.%hhu.%hhu",
00059                                   &u.b[0], &u.b[1], &u.b[2], &u.b[3]) == 4) {
00060                         *mask = addr_hton(u.l);
00061                         rc += 2;
00062                 }
00063         }
00064         
00065         return rc;
00066 }

Generated on Sun Dec 3 17:45:53 2006 for lucid by  doxygen 1.5.1