static struct sockaddr_ll me;
static struct sockaddr_ll he;
static struct timeval last;
-struct cfg_s {
- int dad:1;
- int unsolicited:1;
- int advert:1;
- int quiet:1;
- int quit_on_reply:1;
- int unicasting:1;
- int broadcast_only:1;
+
+enum cfg_e {
+ dad = 1,
+ unsolicited = 2,
+ advert = 4,
+ quiet = 8,
+ quit_on_reply = 16,
+ broadcast_only = 32,
+ unicasting = 64
};
-static struct cfg_s cfg;
+static int cfg;
static int s;
static int count = -1;
ah->ar_pro = htons(ETH_P_IP);
ah->ar_hln = ME->sll_halen;
ah->ar_pln = 4;
- ah->ar_op = cfg.advert ? htons(ARPOP_REPLY) : htons(ARPOP_REQUEST);
+ ah->ar_op = cfg&advert ? htons(ARPOP_REPLY) : htons(ARPOP_REQUEST);
memcpy(p, &ME->sll_addr, ah->ar_hln);
p += ME->sll_halen;
memcpy(p, src_addr, 4);
p += 4;
- if (cfg.advert)
+ if (cfg&advert)
memcpy(p, &ME->sll_addr, ah->ar_hln);
else
memcpy(p, &HE->sll_addr, ah->ar_hln);
if (err == p - buf) {
last = now;
sent++;
- if (!cfg.unicasting)
+ if (!(cfg&unicasting))
brd_sent++;
}
RELEASE_CONFIG_BUFFER(buf);
static void finish(void)
{
- if (!cfg.quiet) {
- printf("Sent %d probes (%d broadcast(s))\n", sent, brd_sent);
- printf("Received %d repl%s", received, (received > 1) ? "ies" : "y");
+ if (!(cfg&quiet)) {
+ printf("Sent %d probes (%d broadcast(s))\n"
+ "Received %d repl%s",
+ sent, brd_sent,
+ received, (received > 1) ? "ies" : "y");
if (brd_recv || req_recv) {
printf(" (");
if (req_recv)
putchar('\n');
fflush(stdout);
}
- if (cfg.dad)
+ if (cfg&dad)
exit(!!received);
- if (cfg.unsolicited)
+ if (cfg&unsolicited)
exit(0);
exit(!received);
}
if (last.tv_sec == 0 || MS_TDIFF(tv, last) > 500) {
send_pack(s, &src, &dst, &me, &he);
- if (count == 0 && cfg.unsolicited)
+ if (count == 0 && cfg&unsolicited)
finish();
}
alarm(1);
return 0;
memcpy(&src_ip, p + ah->ar_hln, 4);
memcpy(&dst_ip, p + ah->ar_hln + 4 + ah->ar_hln, 4);
- if (!cfg.dad) {
+ if (!(cfg&dad)) {
if (src_ip.s_addr != dst.s_addr)
return 0;
if (src.s_addr != dst_ip.s_addr)
if (src.s_addr && src.s_addr != dst_ip.s_addr)
return 0;
}
- if (!cfg.quiet) {
+ if (!(cfg&quiet)) {
int s_printed = 0;
struct timeval tv;
gettimeofday(&tv, NULL);
- printf("%s ",
- FROM->sll_pkttype == PACKET_HOST ? "Unicast" : "Broadcast");
- printf("%s from ",
- ah->ar_op == htons(ARPOP_REPLY) ? "reply" : "request");
- printf("%s ", inet_ntoa(src_ip));
- printf("[%s]", ether_ntoa((struct ether_addr *) p));
+ printf("%s %s from %s [%s]",
+ FROM->sll_pkttype == PACKET_HOST ? "Unicast" : "Broadcast",
+ ah->ar_op == htons(ARPOP_REPLY) ? "reply" : "request",
+ inet_ntoa(src_ip),
+ ether_ntoa((struct ether_addr *) p));
if (dst_ip.s_addr != src.s_addr) {
printf("for %s ", inet_ntoa(dst_ip));
s_printed = 1;
brd_recv++;
if (ah->ar_op == htons(ARPOP_REQUEST))
req_recv++;
- if (cfg.quit_on_reply)
+ if (cfg&quit_on_reply)
finish();
- if (!cfg.broadcast_only) {
+ if (!(cfg&broadcast_only)) {
memcpy(he.sll_addr, p, me.sll_halen);
- cfg.unicasting = 1;
+ cfg |= unicasting;
}
return 1;
}
int arping_main(int argc, char **argv)
{
- int ch;
char *device = "eth0";
int ifindex;
char *source = NULL;
setuid(getuid());
- while ((ch = getopt(argc, argv, "h?bfDUAqc:w:s:I:")) != EOF) {
- switch (ch) {
- case 'b':
- cfg.broadcast_only = 1;
- break;
- case 'D':
- cfg.dad = 1;
- cfg.quit_on_reply = 1;
- break;
- case 'U':
- cfg.unsolicited = 1;
- break;
- case 'A':
- cfg.advert = 1;
- cfg.unsolicited = 1;
- break;
- case 'q':
- cfg.quiet = 1;
- break;
- case 'c':
- count = atoi(optarg);
- break;
- case 'w':
- timeout = atoi(optarg);
- break;
- case 'I':
- if (optarg == NULL)
- bb_show_usage();
- if (bb_strlen(optarg) > IF_NAMESIZE) {
+ {
+ unsigned long opt;
+ char *_count, *_timeout, *_device;
+
+ /* Dad also sets quit_on_reply.
+ * Advert also sets unsolicited.
+ */
+ bb_opt_complementally = "Df:AU";
+ opt = bb_getopt_ulflags(argc, argv, "DUAqfbc:w:i:s:",
+ &_count, &_timeout, &_device);
+ cfg |= opt & 63; /* set respective flags */
+ if (opt & 64) /* count */
+ count = atoi(_count);
+ if (opt & 128) /* timeout */
+ timeout = atoi(_timeout);
+ if (opt & 256) { /* interface */
+ if (bb_strlen(_device) > IF_NAMESIZE) {
bb_error_msg_and_die("Interface name `%s' must be less than %d",
- optarg, IF_NAMESIZE);
+ _device, IF_NAMESIZE);
}
- device = optarg;
- break;
- case 'f':
- cfg.quit_on_reply = 1;
- break;
- case 's':
- source = optarg;
- break;
- case 'h':
- case '?':
- default:
- bb_show_usage();
+ device = _device;
}
+ if (opt & 512) /* source */
+ source = optarg;
}
argc -= optind;
argv += optind;
bb_show_usage();
target = *argv;
- bb_default_error_retval = 2;
+
if (s < 0) {
- bb_perror_msg("socket");
- exit(ifindex);
+ bb_default_error_retval = ifindex;
+ bb_perror_msg_and_die("socket");
}
+ bb_default_error_retval = 2;
{
struct ifreq ifr;
}
if (ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK)) {
bb_error_msg("Interface %s is not ARPable", device);
- exit(cfg.dad ? 0 : 2);
+ exit(cfg&dad ? 0 : 2);
}
}
bb_error_msg_and_die("invalid source address %s", source);
}
- if (!cfg.dad && cfg.unsolicited && src.s_addr == 0)
+ if (!(cfg&dad) && cfg&unsolicited && src.s_addr == 0)
src = dst;
- if (!cfg.dad || src.s_addr) {
+ if (!(cfg&dad) || src.s_addr) {
struct sockaddr_in saddr;
int probe_fd = socket(AF_INET, SOCK_DGRAM, 0);
if (bind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr)) == -1) {
bb_error_msg_and_die("bind");
}
- } else if (!cfg.dad) {
+ } else if (!(cfg&dad)) {
int on = 1;
socklen_t alen = sizeof(saddr);
}
if (me.sll_halen == 0) {
bb_error_msg("Interface \"%s\" is not ARPable (no ll address)", device);
- exit(cfg.dad ? 0 : 2);
+ exit(cfg&dad ? 0 : 2);
}
he = me;
memset(he.sll_addr, -1, he.sll_halen);
- if (!cfg.quiet) {
- printf("ARPING to %s", inet_ntoa(dst));
- printf(" from %s via %s\n", inet_ntoa(src),
- device ? device : "unknown");
+ if (!(cfg&quiet)) {
+ printf("ARPING to %s from %s via %s\n",
+ inet_ntoa(dst), inet_ntoa(src),
+ device ? device : "unknown");
}
- if (!src.s_addr && !cfg.dad) {
+ if (!src.s_addr && !(cfg&dad)) {
bb_error_msg_and_die("no src address in the non-DAD mode");
}
while (1) {
sigset_t sset, osset;
- unsigned char packet[4096];
+ RESERVE_CONFIG_UBUFFER(packet, 4096);
struct sockaddr_ll from;
socklen_t alen = sizeof(from);
int cc;
- if ((cc = recvfrom(s, packet, sizeof(packet), 0,
+ if ((cc = recvfrom(s, packet, 4096, 0,
(struct sockaddr *) &from, &alen)) < 0) {
perror("recvfrom");
continue;
sigprocmask(SIG_BLOCK, &sset, &osset);
recv_pack(packet, cc, &from);
sigprocmask(SIG_SETMASK, &osset, NULL);
+ RELEASE_CONFIG_BUFFER(packet);
}
}
projects / oweals / busybox.git / blobdiff