From 137669449a175280f6ab676e1c42ffe7401a4592 Mon Sep 17 00:00:00 2001 From: Bernhard Reutner-Fischer Date: Fri, 31 Mar 2006 18:02:46 +0000 Subject: [PATCH] - 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 --- networking/arping.c | 141 ++++++++++++++++++++------------------------ 1 file 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"); } -- 2.25.1