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-rw-r--r--networking/arping.c141
1 files changed, 65 insertions, 76 deletions
diff --git a/networking/arping.c b/networking/arping.c
index 90a03a58e..782b61b64 100644
--- a/networking/arping.c
+++ b/networking/arping.c
@@ -29,16 +29,17 @@ static struct in_addr dst;
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,
+ unicasting = 32,
+ broadcast_only = 64
};
-static struct cfg_s cfg;
+static int cfg;
static int s;
static int count = -1;
@@ -70,7 +71,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
{
int err;
struct timeval now;
- RESERVE_CONFIG_UBUFFER(buf, 256);
+ unsigned char buf[256];
struct arphdr *ah = (struct arphdr *) buf;
unsigned char *p = (unsigned char *) (ah + 1);
@@ -79,7 +80,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
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;
@@ -87,7 +88,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
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);
@@ -101,16 +102,15 @@ static int send_pack(int sock, struct in_addr *src_addr,
if (err == p - buf) {
last = now;
sent++;
- if (!cfg.unicasting)
+ if (!(cfg&unicasting))
brd_sent++;
}
- RELEASE_CONFIG_BUFFER(buf);
return err;
}
static void finish(void)
{
- if (!cfg.quiet) {
+ 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 (brd_recv || req_recv) {
@@ -124,9 +124,9 @@ static void finish(void)
putchar('\n');
fflush(stdout);
}
- if (cfg.dad)
+ if (cfg&dad)
exit(!!received);
- if (cfg.unsolicited)
+ if (cfg&unsolicited)
exit(0);
exit(!received);
}
@@ -147,7 +147,7 @@ static void catcher(void)
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);
@@ -186,7 +186,7 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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)
@@ -214,7 +214,7 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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;
@@ -254,18 +254,17 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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;
@@ -276,51 +275,40 @@ int arping_main(int argc, char **argv)
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;
+ opt = bb_getopt_ulflags(argc, argv, "DUAqfbc:w:i:s:",
+ &_count, &_timeout, &_device);
+ if (opt & 1) { /* Dad */
+ cfg |= dad;
+ cfg |= quit_on_reply;
+ }
+ if (opt & 2) /* Unsolicited */
+ cfg |= unsolicited;
+ if (opt & 4) { /* Advert */
+ cfg |= advert;
+ cfg |= unsolicited;
+ }
+ if (opt & 8) /* quiet */
+ cfg |= quiet;
+ if (opt & 16) /* quit on reply */
+ cfg |= quit_on_reply;
+ if (opt & 32) /* broadcast only */
+ cfg |= broadcast_only;
+ 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;
@@ -329,12 +317,13 @@ int arping_main(int argc, char **argv)
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;
@@ -354,7 +343,7 @@ int arping_main(int argc, char **argv)
}
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);
}
}
@@ -372,10 +361,10 @@ int arping_main(int argc, char **argv)
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);
@@ -395,7 +384,7 @@ int arping_main(int argc, char **argv)
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);
@@ -435,18 +424,18 @@ int arping_main(int argc, char **argv)
}
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) {
+ if (!(cfg&quiet)) {
printf("ARPING to %s", inet_ntoa(dst));
printf(" from %s via %s\n", 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");
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 05:15:57 +0000