- shrink it a bit further.

   text	   data	    bss	    dec	    hex	filename
   3627	      4	    120	   3751	    ea7	networking/arping.o.oorig
   3548	      4	     96	   3648	    e40	networking/arping.o

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");
         }