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authorDenis Vlasenko <vda.linux@googlemail.com>2007-06-17 19:09:05 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2007-06-17 19:09:05 +0000
commit459be35234cc24b69309eb0ee22600024c73713e (patch)
tree15ac4122d9c42ec75ba68d342827e37fcb1306ed /networking
parente79dd06782175d50f639180cde5b2c56933aa2ee (diff)
downloadbusybox-459be35234cc24b69309eb0ee22600024c73713e.tar.gz
hwclock: size optimizations
libbb/time.c: new file, introducing monotonic_us() pscan, traceroute, arping: use it instead of gettimeofday ping, zcip: TODO function old new delta monotonic_us - 89 +89 find_pair 164 180 +16 .rodata 129747 129763 +16 refresh 1144 1152 +8 ............ timeout 8 4 -4 static.start 8 4 -4 last 8 4 -4 parse_conf 1303 1284 -19 time_main 1149 1124 -25 gettimeofday_us 39 - -39 arping_main 2042 1969 -73 hwclock_main 594 501 -93 catcher 485 380 -105 traceroute_main 4300 4117 -183 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 8/11 up/down: 157/-562) Total: -405 bytes
Diffstat (limited to 'networking')
-rw-r--r--networking/arping.c125
-rw-r--r--networking/pscan.c28
-rw-r--r--networking/traceroute.c53
-rw-r--r--networking/wget.c2
4 files changed, 83 insertions, 125 deletions
diff --git a/networking/arping.c b/networking/arping.c
index 1b2604902..a022e70ea 100644
--- a/networking/arping.c
+++ b/networking/arping.c
@@ -8,9 +8,6 @@
* Busybox port: Nick Fedchik <nick@fedchik.org.ua>
*/
-//#include <sys/ioctl.h>
-//#include <signal.h>
-
#include <arpa/inet.h>
#include <net/if.h>
#include <netinet/ether.h>
@@ -18,42 +15,42 @@
#include "libbb.h"
+/* We don't expect to see 1000+ seconds delay, unsigned is enough */
+#define MONOTONIC_US() ((unsigned)monotonic_us())
+
static struct in_addr src;
static struct in_addr dst;
static struct sockaddr_ll me;
static struct sockaddr_ll he;
-static struct timeval last;
-
-enum cfg_e {
- dad = 1,
- unsolicited = 2,
- advert = 4,
- quiet = 8,
- quit_on_reply = 16,
- broadcast_only = 32,
- unicasting = 64
+static unsigned last;
+
+enum {
+ DAD = 1,
+ UNSOLICITED = 2,
+ ADVERT = 4,
+ QUIET = 8,
+ QUIT_ON_REPLY = 16,
+ BCAST_ONLY = 32,
+ UNICASTING = 64
};
static int cfg;
static int s;
static unsigned count = UINT_MAX;
-static unsigned timeout;
+static unsigned timeout_us;
static int sent;
static int brd_sent;
static int received;
static int brd_recv;
static int req_recv;
-#define MS_TDIFF(tv1,tv2) ( ((tv1).tv_sec-(tv2).tv_sec)*1000 + \
- ((tv1).tv_usec-(tv2).tv_usec)/1000 )
-
static int send_pack(int sock, struct in_addr *src_addr,
struct in_addr *dst_addr, struct sockaddr_ll *ME,
struct sockaddr_ll *HE)
{
int err;
- struct timeval now;
- RESERVE_CONFIG_UBUFFER(buf, 256);
+ unsigned now;
+ unsigned char buf[256];
struct arphdr *ah = (struct arphdr *) buf;
unsigned char *p = (unsigned char *) (ah + 1);
@@ -62,7 +59,7 @@ 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;
@@ -70,7 +67,7 @@ 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);
@@ -79,21 +76,21 @@ static int send_pack(int sock, struct in_addr *src_addr,
memcpy(p, dst_addr, 4);
p += 4;
- gettimeofday(&now, NULL);
+ now = MONOTONIC_US();
err = sendto(sock, buf, p - buf, 0, (struct sockaddr *) HE, sizeof(*HE));
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) ATTRIBUTE_NORETURN;
static void finish(void)
{
- if (!(cfg & quiet)) {
+ if (!(cfg & QUIET)) {
printf("Sent %d probe(s) (%d broadcast(s))\n"
"Received %d repl%s"
" (%d request(s), %d broadcast(s))\n",
@@ -101,30 +98,31 @@ static void finish(void)
received, (received == 1) ? "ies" : "y",
req_recv, brd_recv);
}
- if (cfg & dad)
+ if (cfg & DAD)
exit(!!received);
- if (cfg & unsolicited)
+ if (cfg & UNSOLICITED)
exit(0);
exit(!received);
}
static void catcher(void)
{
- struct timeval tv;
- static struct timeval start;
+ static unsigned start;
- gettimeofday(&tv, NULL);
+ unsigned now;
- if (start.tv_sec == 0)
- start = tv;
+ now = MONOTONIC_US();
+ if (start == 0)
+ start = now;
- if (count-- == 0
- || (timeout && MS_TDIFF(tv, start) > timeout * 1000 + 500))
+ if (count == 0 || (timeout_us && (now - start) > (timeout_us + 500000)))
finish();
- if (last.tv_sec == 0 || MS_TDIFF(tv, last) > 500) {
+ count--;
+
+ if (last == 0 || (now - last) > 500000) {
send_pack(s, &src, &dst, &me, &he);
- if (count == 0 && (cfg & unsolicited))
+ if (count == 0 && (cfg & UNSOLICITED))
finish();
}
alarm(1);
@@ -162,7 +160,7 @@ 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)
@@ -190,11 +188,8 @@ 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;
-
- gettimeofday(&tv, NULL);
printf("%scast re%s from %s [%s]",
FROM->sll_pkttype == PACKET_HOST ? "Uni" : "Broad",
@@ -212,13 +207,8 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
ether_ntoa((struct ether_addr *) p + ah->ar_hln + 4));
}
- if (last.tv_sec) {
- long usecs = (tv.tv_sec - last.tv_sec) * 1000000 +
- tv.tv_usec - last.tv_usec;
- long msecs = (usecs + 500) / 1000;
-
- usecs -= msecs * 1000 - 500;
- printf(" %ld.%03ldms\n", msecs, usecs);
+ if (last) {
+ printf(" %u.%03ums\n", last / 1000, last % 1000);
} else {
printf(" UNSOLICITED?\n");
}
@@ -229,11 +219,11 @@ 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 & BCAST_ONLY)) {
memcpy(he.sll_addr, p, me.sll_halen);
- cfg |= unicasting;
+ cfg |= UNICASTING;
}
return 1;
}
@@ -245,6 +235,7 @@ int arping_main(int argc, char **argv)
int ifindex;
char *source = NULL;
char *target;
+ unsigned char *packet;
s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
@@ -258,28 +249,23 @@ int arping_main(int argc, char **argv)
/* Dad also sets quit_on_reply.
* Advert also sets unsolicited.
*/
- opt_complementary = "Df:AU";
+ opt_complementary = "=1:Df:AU";
opt = getopt32(argc, argv, "DUAqfbc:w:I:s:",
&_count, &_timeout, &device, &source);
cfg |= opt & 0x3f; /* set respective flags */
if (opt & 0x40) /* -c: count */
count = xatou(_count);
if (opt & 0x80) /* -w: timeout */
- timeout = xatoul_range(_timeout, 0, INT_MAX/2000);
- //if (opt & 0x100) /* -i: interface */
- if (strlen(device) > IF_NAMESIZE) {
+ timeout_us = xatou_range(_timeout, 0, INT_MAX/2000000) * 1000000;
+ //if (opt & 0x100) /* -I: interface */
+ if (strlen(device) >= IF_NAMESIZE) {
bb_error_msg_and_die("interface name '%s' is too long",
device);
}
//if (opt & 0x200) /* -s: source */
}
- argc -= optind;
- argv += optind;
-
- if (argc != 1)
- bb_show_usage();
- target = *argv;
+ target = argv[optind];
xfunc_error_retval = 2;
@@ -301,7 +287,7 @@ int arping_main(int argc, char **argv)
}
if (ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK)) {
bb_error_msg("interface %s is not ARPable", device);
- return (cfg & dad ? 0 : 2);
+ return (cfg & DAD ? 0 : 2);
}
}
@@ -317,10 +303,10 @@ 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 = xsocket(AF_INET, SOCK_DGRAM, 0);
@@ -333,7 +319,7 @@ int arping_main(int argc, char **argv)
if (src.s_addr) {
saddr.sin_addr = src;
xbind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
- } else if (!(cfg & dad)) {
+ } else if (!(cfg & DAD)) {
socklen_t alen = sizeof(saddr);
saddr.sin_port = htons(1025);
@@ -364,18 +350,18 @@ int arping_main(int argc, char **argv)
}
if (me.sll_halen == 0) {
bb_error_msg("interface \"%s\" is not ARPable (no ll address)", device);
- return (cfg & dad ? 0 : 2);
+ return (cfg & DAD ? 0 : 2);
}
he = me;
memset(he.sll_addr, -1, he.sll_halen);
- if (!(cfg & quiet)) {
+ 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");
}
@@ -394,9 +380,9 @@ int arping_main(int argc, char **argv)
catcher();
+ packet = xmalloc(4096);
while (1) {
sigset_t sset, osset;
- RESERVE_CONFIG_UBUFFER(packet, 4096);
struct sockaddr_ll from;
socklen_t alen = sizeof(from);
int cc;
@@ -412,6 +398,5 @@ int arping_main(int argc, char **argv)
sigprocmask(SIG_BLOCK, &sset, &osset);
recv_pack(packet, cc, &from);
sigprocmask(SIG_SETMASK, &osset, NULL);
- RELEASE_CONFIG_BUFFER(packet);
}
}
diff --git a/networking/pscan.c b/networking/pscan.c
index 10bf3b606..9fa6993e8 100644
--- a/networking/pscan.c
+++ b/networking/pscan.c
@@ -17,19 +17,6 @@
#define DERR(...) ((void)0)
#endif
-/* return time in usec */
-// TODO: move to libbb and use in traceroute, zcip, arping etc
-// (maybe also use absolute monotonic clock - no time warps
-// due to admin resetting date/time?)
-static unsigned gettimeofday_us(void)
-{
- struct timeval now;
-
- if (gettimeofday(&now, NULL))
- return 0;
- return (now.tv_sec * 1000000 + now.tv_usec);
-}
-
static const char *port_name(unsigned port)
{
struct servent *server;
@@ -40,6 +27,9 @@ static const char *port_name(unsigned port)
return "unknown";
}
+/* We don't expect to see 1000+ seconds delay, unsigned is enough */
+#define MONOTONIC_US() ((unsigned)monotonic_us())
+
int pscan_main(int argc, char **argv);
int pscan_main(int argc, char **argv)
{
@@ -91,7 +81,7 @@ int pscan_main(int argc, char **argv)
/* Nonblocking connect typically "fails" with errno == EINPROGRESS */
ndelay_on(s);
DMSG("connect to port %u", port);
- start = gettimeofday_us();
+ start = MONOTONIC_US();
if (connect(s, &lsap->sa, lsap->len) == 0) {
/* Unlikely, for me even localhost fails :) */
DMSG("connect succeeded");
@@ -110,15 +100,15 @@ int pscan_main(int argc, char **argv)
closed_ports++;
break;
}
- DERR("port %u errno %d @%u", port, errno, gettimeofday_us() - start);
- if ((gettimeofday_us() - start) > rtt_4)
+ DERR("port %u errno %d @%u", port, errno, MONOTONIC_US() - start);
+ if ((MONOTONIC_US() - start) > rtt_4)
break;
/* Can sleep (much) longer than specified delay.
* We check rtt BEFORE we usleep, otherwise
* on localhost we'll do zero writes done (!)
* before we exceed (rather small) rtt */
usleep(rtt_4/8);
- DMSG("write to port %u @%u", port, gettimeofday_us() - start);
+ DMSG("write to port %u @%u", port, MONOTONIC_US() - start);
if (write(s, " ", 1) >= 0) { /* We were able to write to the socket */
open:
open_ports++;
@@ -126,13 +116,13 @@ int pscan_main(int argc, char **argv)
break;
}
}
- DMSG("out of loop @%u", gettimeofday_us() - start);
+ DMSG("out of loop @%u", MONOTONIC_US() - start);
/* Estimate new rtt - we don't want to wait entire timeout
* for each port. *4 allows for rise in net delay.
* We increase rtt quickly (*4), decrease slowly (4/8 == 1/2)
* because we don't want to accidentally miss ports. */
- rtt_4 = (gettimeofday_us() - start) * 4;
+ rtt_4 = (MONOTONIC_US() - start) * 4;
if (rtt_4 < min_rtt)
rtt_4 = min_rtt;
if (rtt_4 > timeout)
diff --git a/networking/traceroute.c b/networking/traceroute.c
index 40533a82d..9fc15d390 100644
--- a/networking/traceroute.c
+++ b/networking/traceroute.c
@@ -275,7 +275,8 @@ struct hostinfo {
struct outdata {
unsigned char seq; /* sequence number of this packet */
unsigned char ttl; /* ttl packet left with */
- struct timeval tv ATTRIBUTE_PACKED; /* time packet left */
+// UNUSED. Retaining to have the same packet size.
+ struct timeval tv_UNUSED ATTRIBUTE_PACKED; /* time packet left */
};
struct IFADDRLIST {
@@ -533,37 +534,19 @@ findsaddr(const struct sockaddr_in *to, struct sockaddr_in *from)
*/
-/*
- * Subtract 2 timeval structs: out = out - in.
- * Out is assumed to be >= in.
- */
-static inline void
-tvsub(struct timeval *out, struct timeval *in)
-{
-
- if ((out->tv_usec -= in->tv_usec) < 0) {
- --out->tv_sec;
- out->tv_usec += 1000000;
- }
- out->tv_sec -= in->tv_sec;
-}
-
static int
-wait_for_reply(int sock, struct sockaddr_in *fromp, const struct timeval *tp)
+wait_for_reply(int sock, struct sockaddr_in *fromp)
{
fd_set fds;
- struct timeval now, tvwait;
- struct timezone tz;
+ struct timeval tvwait;
int cc = 0;
socklen_t fromlen = sizeof(*fromp);
FD_ZERO(&fds);
FD_SET(sock, &fds);
- tvwait.tv_sec = tp->tv_sec + waittime;
- tvwait.tv_usec = tp->tv_usec;
- (void)gettimeofday(&now, &tz);
- tvsub(&tvwait, &now);
+ tvwait.tv_sec = waittime;
+ tvwait.tv_usec = 0;
if (select(sock + 1, &fds, NULL, NULL, &tvwait) > 0)
cc = recvfrom(sock, (char *)packet, sizeof(packet), 0,
@@ -609,7 +592,7 @@ in_cksum(uint16_t *addr, int len)
static void
-send_probe(int seq, int ttl, struct timeval *tp)
+send_probe(int seq, int ttl)
{
int cc;
struct udpiphdr *ui, *oui;
@@ -633,7 +616,8 @@ send_probe(int seq, int ttl, struct timeval *tp)
/* Payload */
outdata->seq = seq;
outdata->ttl = ttl;
- memcpy(&outdata->tv, tp, sizeof(outdata->tv));
+// UNUSED: was storing gettimeofday's result there, but never ever checked it
+ /*memcpy(&outdata->tv, tp, sizeof(outdata->tv));*/
#if ENABLE_FEATURE_TRACEROUTE_USE_ICMP
if (useicmp)
@@ -706,7 +690,6 @@ send_probe(int seq, int ttl, struct timeval *tp)
packlen, (struct sockaddr *)&whereto, sizeof(whereto));
if (cc != packlen) {
bb_info_msg("wrote %s %d chars, ret=%d", hostname, packlen, cc);
-// (void)fflush(stdout);
}
}
@@ -908,9 +891,9 @@ getaddr(uint32_t *ap, const char *host)
#endif
static void
-print_delta_ms(struct timeval *t1p, struct timeval *t2p)
+print_delta_ms(unsigned t1p, unsigned t2p)
{
- unsigned tt = (t2p->tv_sec - t1p->tv_sec) * 1000000 + (t2p->tv_usec - t1p->tv_usec);
+ unsigned tt = t2p - t1p;
printf(" %u.%03u ms", tt/1000, tt%1000);
}
@@ -1230,17 +1213,17 @@ int traceroute_main(int argc, char **argv)
printf("%2d ", ttl);
for (probe = 0; probe < nprobes; ++probe) {
int cc;
- struct timeval t1, t2;
- struct timezone tz;
+ unsigned t1;
+ unsigned t2;
struct ip *ip;
if (sentfirst && pausemsecs > 0)
usleep(pausemsecs * 1000);
- (void)gettimeofday(&t1, &tz);
- send_probe(++seq, ttl, &t1);
+ t1 = monotonic_us();
+ send_probe(++seq, ttl);
++sentfirst;
- while ((cc = wait_for_reply(s, from, &t1)) != 0) {
- (void)gettimeofday(&t2, &tz);
+ while ((cc = wait_for_reply(s, from)) != 0) {
+ t2 = monotonic_us();
i = packet_ok(packet, cc, from, seq);
/* Skip short packet */
if (i == 0)
@@ -1251,7 +1234,7 @@ int traceroute_main(int argc, char **argv)
lastaddr = from->sin_addr.s_addr;
++gotlastaddr;
}
- print_delta_ms(&t1, &t2);
+ print_delta_ms(t1, t2);
ip = (struct ip *)packet;
if (op & OPT_TTL_FLAG)
printf(" (%d)", ip->ip_ttl);
diff --git a/networking/wget.c b/networking/wget.c
index fe669bbdd..fc7f7c32c 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -705,7 +705,7 @@ progressmeter(int flag)
ratio = 100;
if (totalsize != 0 && !chunked) {
/* long long helps to have working ETA even if !LFS */
- ratio = (int) (100 * (unsigned long long)(transferred+beg_range) / totalsize);
+ ratio = (int) (100ULL * (transferred+beg_range) / totalsize);
ratio = MIN(ratio, 100);
}