* Copyright (C) 2003 by Arthur van Hoff (avh@strangeberry.com)
* Copyright (C) 2004 by David Brownell
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- * 02111-1307 USA
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
/*
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>
-#include <sys/time.h>
#include <sys/socket.h>
#include <arpa/inet.h>
struct in_addr source_ip;
struct ether_addr target_addr;
struct in_addr target_ip;
-} __attribute__ ((__packed__));
+} ATTRIBUTE_PACKED;
+enum {
/* 169.254.0.0 */
-static const uint32_t LINKLOCAL_ADDR = 0xa9fe0000;
+ LINKLOCAL_ADDR = 0xa9fe0000,
/* protocol timeout parameters, specified in seconds */
-static const unsigned PROBE_WAIT = 1;
-static const unsigned PROBE_MIN = 1;
-static const unsigned PROBE_MAX = 2;
-static const unsigned PROBE_NUM = 3;
-static const unsigned MAX_CONFLICTS = 10;
-static const unsigned RATE_LIMIT_INTERVAL = 60;
-static const unsigned ANNOUNCE_WAIT = 2;
-static const unsigned ANNOUNCE_NUM = 2;
-static const unsigned ANNOUNCE_INTERVAL = 2;
-static const time_t DEFEND_INTERVAL = 10;
+ PROBE_WAIT = 1,
+ PROBE_MIN = 1,
+ PROBE_MAX = 2,
+ PROBE_NUM = 3,
+ MAX_CONFLICTS = 10,
+ RATE_LIMIT_INTERVAL = 60,
+ ANNOUNCE_WAIT = 2,
+ ANNOUNCE_NUM = 2,
+ ANNOUNCE_INTERVAL = 2,
+ DEFEND_INTERVAL = 10
+};
static const unsigned char ZCIP_VERSION[] = "0.75 (18 April 2005)";
static char *prog;
execl(script, script, arg, NULL);
perror("execl");
_exit(EXIT_FAILURE);
- }
+ }
if (waitpid(pid, &status, 0) <= 0) {
why = "waitpid";
/**
* Print usage information.
*/
-static void __attribute__ ((noreturn))
-usage(const char *msg)
+static void ATTRIBUTE_NORETURN
+zcip_usage(const char *msg)
{
fprintf(stderr, "%s: %s\n", prog, msg);
#ifdef NO_BUSYBOX
/**
* main program
*/
+
+#ifdef NO_BUSYBOX
int
main(int argc, char *argv[])
__attribute__ ((weak, alias ("zcip_main")));
+#endif
int zcip_main(int argc, char *argv[])
{
if (inet_aton(optarg, &ip) == 0
|| (ntohl(ip.s_addr) & IN_CLASSB_NET)
!= LINKLOCAL_ADDR) {
- usage("invalid link address");
+ zcip_usage("invalid link address");
}
continue;
case 'v':
foreground = 1;
continue;
default:
- usage("bad option");
+ zcip_usage("bad option");
}
}
if (optind < argc - 1) {
script = argv[optind++];
}
if (optind != argc || !intf)
- usage("wrong number of arguments");
+ zcip_usage("wrong number of arguments");
openlog(prog, 0, LOG_DAEMON);
// initialize the interface (modprobe, ifup, etc)
goto fail;
} else {
struct ifreq ifr;
- short seed[3];
+ unsigned short seed[3];
// get the interface's ethernet address
memset(&ifr, 0, sizeof (ifr));
fds[0].events = POLLIN;
fds[0].revents = 0;
- // poll, being ready to adjust current timeout
+ // poll, being ready to adjust current timeout
if (timeout > 0) {
gettimeofday(&tv1, NULL);
tv1.tv_usec += (timeout % 1000) * 1000;
gettimeofday(&tv2, NULL);
if (timercmp(&tv1, &tv2, <)) {
- timeout = -1;
+ timeout = 0;
} else {
timersub(&tv1, &tv2, &tv1);
timeout = 1000 * tv1.tv_sec
&& p.arp.ar_op != htons(ARPOP_REPLY))
continue;
- // some cases are always conflicts
+ // some cases are always conflicts
if ((p.source_ip.s_addr == ip.s_addr)
&& (memcmp(&addr, &p.source_addr,
ETH_ALEN) != 0)) {
bad:
if (foreground)
perror(why);
- else
+ else
syslog(LOG_ERR, "%s %s, %s error: %s",
prog, intf, why, strerror(errno));
return EXIT_FAILURE;