Annotation of embedaddon/ipguard/ipguard.c, revision 1.1
1.1 ! misho 1: /* ipguard.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: ipguard.c,v 1.18 2010/07/12 03:46:36 sead Exp $
! 27: *
! 28: */
! 29:
! 30: #include "ipguard.h"
! 31:
! 32: void usage(char *name) {
! 33: fprintf(stdout, "%s v%s (c) %s <%s>\n\n", NAME, VERSION, AUTHOR, MAIL);
! 34: fprintf(stdout, "usage: %s [-h] [-ajgrxziovd]\n", name);
! 35: fprintf(stdout, " [-f ethers] [-l log] [-p pid] [-m mac] [-c filter] [-u seconds] [-k seconds]\n");
! 36: fprintf(stdout, " [-n fakes] [-t mseconds] [-b buf] [-s user] <iface>\n\n");
! 37: }
! 38:
! 39: void help(void) {
! 40: fprintf(stdout, "available options:\n");
! 41: fprintf(stdout, " -f | -e <ethers> ethers file (" ETHERSFILE ")\n");
! 42: fprintf(stdout, " -l <log> log file (" LOGNAME "_<iface>.log)\n");
! 43: fprintf(stdout, " -p <pid> pid file (" PIDNAME "_<iface>.pid)\n");
! 44: fprintf(stdout, " -m <mac> fake mac (" FAKEMAC ")\n");
! 45: fprintf(stdout, " -c <filter> pcap expression (none)\n");
! 46: fprintf(stdout, " -u <seconds> update ethers interval (%d)\n", ETHERSTO);
! 47: fprintf(stdout, " -k <seconds> fake regenerate time (%d)\n", FAKEREGEN);
! 48: fprintf(stdout, " -n <fakes> fake replies number (%d)\n", FAKENUM);
! 49: fprintf(stdout, " -t <mseconds> time between fakes (%d)\n", FAKETIME);
! 50: fprintf(stdout, " -b <buf> mac-ip buffer size (%d)\n", BUFSIZE);
! 51: fprintf(stdout, " -s <user> set user (none)\n");
! 52: fprintf(stdout, " -a no address substitution\n");
! 53: fprintf(stdout, " -j disable first mac-ip\n");
! 54: fprintf(stdout, " -g default to grant\n");
! 55: fprintf(stdout, " -r read only\n");
! 56: fprintf(stdout, " -x duplex mode\n");
! 57: fprintf(stdout, " -z fix by broadcast\n");
! 58: fprintf(stdout, " -i hidden mode\n");
! 59: fprintf(stdout, " -o promiscuous mode\n");
! 60: fprintf(stdout, " -v be verbose\n");
! 61: fprintf(stdout, " -d[d[d]] don't fork [debug [more]]\n");
! 62: fprintf(stdout, " -h this help\n");
! 63: }
! 64:
! 65: int main(int argc, char *argv[]) {
! 66: extern char *optarg;
! 67: extern int optind;
! 68: int n;
! 69:
! 70: if (getuid()) {
! 71: fprintf(stderr, "error: must be run as root to init libnet\n");
! 72: exit(EXIT_FAILURE);
! 73: }
! 74:
! 75: srand((unsigned int) getpid());
! 76:
! 77: iface[0] = fmac[0] = pfmac[0] = pcapf[0] = log_name[0] = pid_name[0] = suser[0] = '\0';
! 78: strncpy(ethers_name, ETHERSFILE, PATH_MAX);
! 79: strncpy(fmac, FAKEMAC, 18);
! 80: ethers_update = ETHERSTO;
! 81: fake_regen = FAKEREGEN;
! 82: fake_num = FAKENUM;
! 83: fake_time = FAKETIME;
! 84: buffer_num = BUFSIZE;
! 85: addr_nosubst = nofirst = grant = read_only = duplex = fixbc = hidden =
! 86: promisc = debug = verbose = 0;
! 87:
! 88: all = good = grat = wgrat = zmac = zip = bad = bmac = bsip =
! 89: btip = bnew = bgrat = mymac = fake = pfake = nzh = nbe = mis = 0;
! 90:
! 91: /* Still unused letters: q:w:y and all of figures ;)
! 92: */
! 93:
! 94: while ((n = getopt(argc, argv, "f:e:l:p:m:c:s:u:k:n:t:b:ajgrxziovdh")) != EOF) {
! 95: switch (n) {
! 96: case 'f':
! 97: case 'e': strncpy(ethers_name, optarg, PATH_MAX); break;
! 98: case 'l': strncpy(log_name, optarg, PATH_MAX); break;
! 99: case 'p': strncpy(pid_name, optarg, PATH_MAX); break;
! 100: case 'm': strncpy(fmac, optarg, 18); break;
! 101: case 'c': strncpy(pcapf, optarg, PCAPFSIZ); break;
! 102: case 's': strncpy(suser, optarg, MAXLOGNAME); break;
! 103: case 'u': ethers_update = atoi(optarg); break;
! 104: case 'k': fake_regen = atoi(optarg); break;
! 105: case 'n': fake_num = atoi(optarg); break;
! 106: case 't': fake_time = atoi(optarg); break;
! 107: case 'b': buffer_num = atoi(optarg); break;
! 108: case 'a': addr_nosubst++; break;
! 109: case 'j': nofirst++; break;
! 110: case 'g': grant++; break;
! 111: case 'r': read_only++; break;
! 112: case 'x': duplex++; break;
! 113: case 'z': fixbc++; break;
! 114: case 'i': hidden++; break;
! 115: case 'o': promisc++; break;
! 116: case 'v': verbose++; break;
! 117: case 'd': debug++; break;
! 118: case 'h': usage(argv[0]); help(); exit(EXIT_SUCCESS);
! 119: default: usage(argv[0]); exit(EXIT_FAILURE);
! 120: }
! 121: }
! 122: if (argc > optind) { strncpy(iface, argv[optind], IFNAMSIZ); }
! 123: else { usage(argv[0]); exit(EXIT_FAILURE); }
! 124:
! 125: if (!log_name[0]) snprintf(log_name, PATH_MAX, "%s_%s.log", LOGNAME, iface);
! 126: if (!pid_name[0]) snprintf(pid_name, PATH_MAX, "%s_%s.pid", PIDNAME, iface);
! 127:
! 128: if (!pcapf[0]) strncpy(pcapf, "arp", 3);
! 129: else { pcapf[PCAPFSIZ-10] = '\0'; strncat(pcapf, " and arp", 8); }
! 130:
! 131: log_open();
! 132:
! 133: if (verbose) { log_str(NOTICE, "Starting", argv[0]); }
! 134:
! 135: if (debug > 1) {
! 136: fprintf(stderr, "PARAMS:");
! 137: for (n = 1; n < argc; n++) fprintf(stderr, " %s", argv[n]);
! 138: fprintf(stderr, "\n");
! 139: fprintf(stderr, "PCAP FILTER: %s\n", pcapf);
! 140: }
! 141:
! 142: if (!debug) daemonize();
! 143: pid_creat();
! 144: packet_init(iface);
! 145: if (suser[0]) set_user();
! 146: sig_init();
! 147:
! 148: while (1) packet_recv();
! 149:
! 150: exit_ipguard(EXIT_SUCCESS);
! 151: return 0;
! 152: }
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