Annotation of embedaddon/ipguard/ipguard.c, revision 1.1.1.1.4.1
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: *
1.1.1.1.4.1! misho 26: * $Id: ipguard.c,v 1.1.1.1 2012/02/21 21:59:41 misho Exp $
1.1 misho 27: *
28: */
29:
30: #include "ipguard.h"
31:
1.1.1.1.4.1! misho 32:
! 33: char iface[IFNAMSIZ];
! 34: char ethers_name[PATH_MAX];
! 35: char log_name[PATH_MAX];
! 36: char pid_name[PATH_MAX];
! 37: char fmac[18];
! 38: char pcapf[PCAPFSIZ];
! 39: char suser[MAXLOGNAME];
! 40: int ethers_update;
! 41: int fake_regen;
! 42: int fake_num;
! 43: int fake_time;
! 44: int buffer_num;
! 45: int addr_nosubst;
! 46: int nofirst;
! 47: int grant;
! 48: int read_only;
! 49: int duplex;
! 50: int fixbc;
! 51: int hidden;
! 52: int promisc;
! 53: int debug;
! 54: int verbose;
! 55:
! 56: unsigned int all, good, grat, wgrat, zmac, zip, bad, bmac, bsip, btip,
! 57: bnew, bgrat, mymac, fake, pfake, nzh, nbe, mis;
! 58: char pfmac[18];
! 59: char s[128+1];
! 60:
! 61:
1.1 misho 62: void usage(char *name) {
63: fprintf(stdout, "%s v%s (c) %s <%s>\n\n", NAME, VERSION, AUTHOR, MAIL);
64: fprintf(stdout, "usage: %s [-h] [-ajgrxziovd]\n", name);
65: fprintf(stdout, " [-f ethers] [-l log] [-p pid] [-m mac] [-c filter] [-u seconds] [-k seconds]\n");
66: fprintf(stdout, " [-n fakes] [-t mseconds] [-b buf] [-s user] <iface>\n\n");
67: }
68:
69: void help(void) {
70: fprintf(stdout, "available options:\n");
71: fprintf(stdout, " -f | -e <ethers> ethers file (" ETHERSFILE ")\n");
72: fprintf(stdout, " -l <log> log file (" LOGNAME "_<iface>.log)\n");
73: fprintf(stdout, " -p <pid> pid file (" PIDNAME "_<iface>.pid)\n");
74: fprintf(stdout, " -m <mac> fake mac (" FAKEMAC ")\n");
75: fprintf(stdout, " -c <filter> pcap expression (none)\n");
76: fprintf(stdout, " -u <seconds> update ethers interval (%d)\n", ETHERSTO);
77: fprintf(stdout, " -k <seconds> fake regenerate time (%d)\n", FAKEREGEN);
78: fprintf(stdout, " -n <fakes> fake replies number (%d)\n", FAKENUM);
79: fprintf(stdout, " -t <mseconds> time between fakes (%d)\n", FAKETIME);
80: fprintf(stdout, " -b <buf> mac-ip buffer size (%d)\n", BUFSIZE);
81: fprintf(stdout, " -s <user> set user (none)\n");
82: fprintf(stdout, " -a no address substitution\n");
83: fprintf(stdout, " -j disable first mac-ip\n");
84: fprintf(stdout, " -g default to grant\n");
85: fprintf(stdout, " -r read only\n");
86: fprintf(stdout, " -x duplex mode\n");
87: fprintf(stdout, " -z fix by broadcast\n");
88: fprintf(stdout, " -i hidden mode\n");
89: fprintf(stdout, " -o promiscuous mode\n");
90: fprintf(stdout, " -v be verbose\n");
91: fprintf(stdout, " -d[d[d]] don't fork [debug [more]]\n");
92: fprintf(stdout, " -h this help\n");
93: }
94:
95: int main(int argc, char *argv[]) {
96: extern char *optarg;
97: extern int optind;
98: int n;
99:
100: if (getuid()) {
101: fprintf(stderr, "error: must be run as root to init libnet\n");
102: exit(EXIT_FAILURE);
103: }
104:
105: srand((unsigned int) getpid());
106:
107: iface[0] = fmac[0] = pfmac[0] = pcapf[0] = log_name[0] = pid_name[0] = suser[0] = '\0';
108: strncpy(ethers_name, ETHERSFILE, PATH_MAX);
109: strncpy(fmac, FAKEMAC, 18);
110: ethers_update = ETHERSTO;
111: fake_regen = FAKEREGEN;
112: fake_num = FAKENUM;
113: fake_time = FAKETIME;
114: buffer_num = BUFSIZE;
115: addr_nosubst = nofirst = grant = read_only = duplex = fixbc = hidden =
116: promisc = debug = verbose = 0;
117:
118: all = good = grat = wgrat = zmac = zip = bad = bmac = bsip =
119: btip = bnew = bgrat = mymac = fake = pfake = nzh = nbe = mis = 0;
120:
121: /* Still unused letters: q:w:y and all of figures ;)
122: */
123:
124: while ((n = getopt(argc, argv, "f:e:l:p:m:c:s:u:k:n:t:b:ajgrxziovdh")) != EOF) {
125: switch (n) {
126: case 'f':
127: case 'e': strncpy(ethers_name, optarg, PATH_MAX); break;
128: case 'l': strncpy(log_name, optarg, PATH_MAX); break;
129: case 'p': strncpy(pid_name, optarg, PATH_MAX); break;
130: case 'm': strncpy(fmac, optarg, 18); break;
131: case 'c': strncpy(pcapf, optarg, PCAPFSIZ); break;
132: case 's': strncpy(suser, optarg, MAXLOGNAME); break;
133: case 'u': ethers_update = atoi(optarg); break;
134: case 'k': fake_regen = atoi(optarg); break;
135: case 'n': fake_num = atoi(optarg); break;
136: case 't': fake_time = atoi(optarg); break;
137: case 'b': buffer_num = atoi(optarg); break;
138: case 'a': addr_nosubst++; break;
139: case 'j': nofirst++; break;
140: case 'g': grant++; break;
141: case 'r': read_only++; break;
142: case 'x': duplex++; break;
143: case 'z': fixbc++; break;
144: case 'i': hidden++; break;
145: case 'o': promisc++; break;
146: case 'v': verbose++; break;
147: case 'd': debug++; break;
148: case 'h': usage(argv[0]); help(); exit(EXIT_SUCCESS);
149: default: usage(argv[0]); exit(EXIT_FAILURE);
150: }
151: }
152: if (argc > optind) { strncpy(iface, argv[optind], IFNAMSIZ); }
153: else { usage(argv[0]); exit(EXIT_FAILURE); }
154:
155: if (!log_name[0]) snprintf(log_name, PATH_MAX, "%s_%s.log", LOGNAME, iface);
156: if (!pid_name[0]) snprintf(pid_name, PATH_MAX, "%s_%s.pid", PIDNAME, iface);
157:
158: if (!pcapf[0]) strncpy(pcapf, "arp", 3);
159: else { pcapf[PCAPFSIZ-10] = '\0'; strncat(pcapf, " and arp", 8); }
160:
161: log_open();
162:
163: if (verbose) { log_str(NOTICE, "Starting", argv[0]); }
164:
165: if (debug > 1) {
166: fprintf(stderr, "PARAMS:");
167: for (n = 1; n < argc; n++) fprintf(stderr, " %s", argv[n]);
168: fprintf(stderr, "\n");
169: fprintf(stderr, "PCAP FILTER: %s\n", pcapf);
170: }
171:
172: if (!debug) daemonize();
173: pid_creat();
174: packet_init(iface);
175: if (suser[0]) set_user();
176: sig_init();
177:
178: while (1) packet_recv();
179:
180: exit_ipguard(EXIT_SUCCESS);
181: return 0;
182: }
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