Return to ethers.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / ipguard

Annotation of embedaddon/ipguard/ethers.c, revision 1.1.1.1

1.1       misho       1: /*  ethers.c
                      2:  *
                      3:  * Copyright (c) 2010 SeaD <sead at deep.perm.ru>
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  *
                     14:  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     15:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     16:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     17:  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
                     18:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     19:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     20:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     21:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     22:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     23:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     24:  * SUCH DAMAGE.
                     25:  *
                     26:  *  $Id: ethers.c,v 1.14 2010/07/12 03:46:36 sead Exp $
                     27:  *
                     28:  */
                     29: 
                     30: #include "ipguard.h"
                     31: 
                     32: #define STR_SIZE        128
                     33: #define ADDR_LEN        64
                     34: 
                     35: void ethers_init(void) {
                     36:     FILE *eth_fp;
                     37:     char str[STR_SIZE];
                     38:     char mac[ADDR_LEN], ip[ADDR_LEN];
                     39:     register int n, m;
                     40: 
                     41:     if (!(eth_fp = fopen(ethers_name, "r"))) {
                     42:         snprintf(s, 128, "fopen(%s):", ethers_name);
                     43:         log_str(WARNING, s, strerror(errno));
                     44:         return;
                     45:     }
                     46: 
                     47:     while (fgets(str, STR_SIZE, eth_fp)) {
                     48:         if (debug > 2) fprintf(stderr, "ETHERS: %s", str);
                     49:         for (n = 0; n < STR_SIZE; n++)
                     50:             if ((str[n] == '\n') || (str[n] == '\r') || (str[n] == '#')) {
                     51:                 str[n] = '\0'; break;
                     52:             }
                     53:         for (mac[0] = ip[0] = '\0', n = 0; n < STR_SIZE; n++)
                     54:             if ((str[n] != ' ') && (str[n] != '\t')) break;
                     55:         if ((str[n] == '+') || (str[n] == '\0')) continue;
                     56:         for (m = 0; (m < ADDR_LEN) && (n < STR_SIZE); m++, n++) {
                     57:             if ((str[n] == ' ') || (str[n] == '\t') || (str[n] == '\0')) {
                     58:                 mac[m] = '\0'; break;
                     59:             }
                     60:             mac[m] = str[n];
                     61:         }
                     62:         for (; n < STR_SIZE; n++) if ((str[n] != ' ') && (str[n] != '\t')) break;
                     63:         for (m = 0; (m < ADDR_LEN) && (n < STR_SIZE); m++, n++) {
                     64:             if ((str[n] == ' ') || (str[n] == '\t') || (str[n] == '\0')) {
                     65:                 ip[m] = '\0'; break;
                     66:             }
                     67:             ip[m] = str[n];
                     68:         }
                     69: 
                     70:         if (ip[0] == '\0') { if (verbose) log_str(NOTICE, "Incorrect MAC-IP pair:", str); continue; }
                     71:         if (strchr(mac, '.')) { strncpy(str, mac, ADDR_LEN); strncpy(mac, ip, ADDR_LEN); strncpy(ip, str, ADDR_LEN); }
                     72:         if (!strchr(mac, ':')) { if (verbose) log_str(NOTICE, "Wrong MAC address", ip); continue; }
                     73:         if (!strchr(ip, '.')) { if (verbose) log_str(NOTICE, "Wrong IP address", ip); continue; }
                     74: 
                     75:         pair_add(mac, ip);
                     76:     }
                     77: 
                     78:     if (fclose(eth_fp)) {
                     79:         snprintf(s, 128, "fclose(%s):", ethers_name);
                     80:         log_str(ERROR, s, strerror(errno));
                     81:         exit_ipguard(EXIT_FAILURE);
                     82:     }
                     83: }
                     84: 
                     85: void ethers_reinit(void) {
                     86:     pair_destroy(); pair_init(); ethers_init();
                     87:     log_str(NOTICE, "MAC-IP file rescanned:", ethers_name);
                     88: }