mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-11-28 06:00:36 +00:00
Shrink patch from Bernhard Fischer.
This commit is contained in:
Rob Landley
parent
1f6dc6d358
commit
8ea5205726
@ -1,10 +1,8 @@
|
||||
/* vi:set ts=4:*/
|
||||
/*
|
||||
* arping.c - Ping hosts by ARP requests/replies
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version
|
||||
* 2 of the License, or (at your option) any later version.
|
||||
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
||||
*
|
||||
* Author: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
|
||||
* Busybox port: Nick Fedchik <nick@fedchik.org.ua>
|
||||
@ -26,29 +24,32 @@
|
||||
|
||||
#include "busybox.h"
|
||||
|
||||
#define APPLET_NAME "arping"
|
||||
|
||||
static struct in_addr src;
|
||||
static struct in_addr dst;
|
||||
static struct sockaddr_ll me;
|
||||
static struct sockaddr_ll he;
|
||||
static struct timeval last;
|
||||
static int dad;
|
||||
static int unsolicited;
|
||||
static int advert;
|
||||
static int quiet;
|
||||
static int quit_on_reply = 0;
|
||||
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;
|
||||
};
|
||||
static struct cfg_s cfg;
|
||||
|
||||
static int s;
|
||||
static int count = -1;
|
||||
static int timeout;
|
||||
static int unicasting;
|
||||
static int s;
|
||||
static int broadcast_only;
|
||||
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 )
|
||||
#if 0
|
||||
@ -69,7 +70,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
|
||||
{
|
||||
int err;
|
||||
struct timeval now;
|
||||
unsigned char buf[256];
|
||||
RESERVE_CONFIG_UBUFFER(buf, 256);
|
||||
struct arphdr *ah = (struct arphdr *) buf;
|
||||
unsigned char *p = (unsigned char *) (ah + 1);
|
||||
|
||||
@ -78,7 +79,7 @@ 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 = 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;
|
||||
@ -86,7 +87,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
|
||||
memcpy(p, src_addr, 4);
|
||||
p += 4;
|
||||
|
||||
if (advert)
|
||||
if (cfg.advert)
|
||||
memcpy(p, &ME->sll_addr, ah->ar_hln);
|
||||
else
|
||||
memcpy(p, &HE->sll_addr, ah->ar_hln);
|
||||
@ -100,15 +101,16 @@ static int send_pack(int sock, struct in_addr *src_addr,
|
||||
if (err == p - buf) {
|
||||
last = now;
|
||||
sent++;
|
||||
if (!unicasting)
|
||||
if (!cfg.unicasting)
|
||||
brd_sent++;
|
||||
}
|
||||
RELEASE_CONFIG_BUFFER(buf);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void finish(void)
|
||||
{
|
||||
if (!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) {
|
||||
@ -122,9 +124,9 @@ static void finish(void)
|
||||
putchar('\n');
|
||||
fflush(stdout);
|
||||
}
|
||||
if (dad)
|
||||
if (cfg.dad)
|
||||
exit(!!received);
|
||||
if (unsolicited)
|
||||
if (cfg.unsolicited)
|
||||
exit(0);
|
||||
exit(!received);
|
||||
}
|
||||
@ -145,7 +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 && unsolicited)
|
||||
if (count == 0 && cfg.unsolicited)
|
||||
finish();
|
||||
}
|
||||
alarm(1);
|
||||
@ -153,13 +155,10 @@ static void catcher(void)
|
||||
|
||||
static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
|
||||
{
|
||||
struct timeval tv;
|
||||
struct arphdr *ah = (struct arphdr *) buf;
|
||||
unsigned char *p = (unsigned char *) (ah + 1);
|
||||
struct in_addr src_ip, dst_ip;
|
||||
|
||||
gettimeofday(&tv, NULL);
|
||||
|
||||
/* Filter out wild packets */
|
||||
if (FROM->sll_pkttype != PACKET_HOST &&
|
||||
FROM->sll_pkttype != PACKET_BROADCAST &&
|
||||
@ -187,7 +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 (!dad) {
|
||||
if (!cfg.dad) {
|
||||
if (src_ip.s_addr != dst.s_addr)
|
||||
return 0;
|
||||
if (src.s_addr != dst_ip.s_addr)
|
||||
@ -215,8 +214,11 @@ 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 (!quiet) {
|
||||
if (!cfg.quiet) {
|
||||
int s_printed = 0;
|
||||
struct timeval tv;
|
||||
|
||||
gettimeofday(&tv, NULL);
|
||||
|
||||
printf("%s ",
|
||||
FROM->sll_pkttype == PACKET_HOST ? "Unicast" : "Broadcast");
|
||||
@ -234,6 +236,7 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
|
||||
printf("[%s]",
|
||||
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;
|
||||
@ -251,48 +254,46 @@ 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 (quit_on_reply)
|
||||
if (cfg.quit_on_reply)
|
||||
finish();
|
||||
if (!broadcast_only) {
|
||||
if (!cfg.broadcast_only) {
|
||||
memcpy(he.sll_addr, p, me.sll_halen);
|
||||
unicasting = 1;
|
||||
cfg.unicasting = 1;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
int arping_main(int argc, char **argv)
|
||||
{
|
||||
int socket_errno;
|
||||
int ch;
|
||||
uid_t uid = getuid();
|
||||
char *device = "eth0";
|
||||
int ifindex = 0;
|
||||
int ifindex;
|
||||
char *source = NULL;
|
||||
char *target;
|
||||
|
||||
s = socket(PF_PACKET, SOCK_DGRAM, 0);
|
||||
socket_errno = errno;
|
||||
ifindex = errno;
|
||||
|
||||
setuid(uid);
|
||||
setuid(getuid());
|
||||
|
||||
while ((ch = getopt(argc, argv, "h?bfDUAqc:w:s:I:")) != EOF) {
|
||||
switch (ch) {
|
||||
case 'b':
|
||||
broadcast_only = 1;
|
||||
cfg.broadcast_only = 1;
|
||||
break;
|
||||
case 'D':
|
||||
dad++;
|
||||
quit_on_reply = 1;
|
||||
cfg.dad = 1;
|
||||
cfg.quit_on_reply = 1;
|
||||
break;
|
||||
case 'U':
|
||||
unsolicited++;
|
||||
cfg.unsolicited = 1;
|
||||
break;
|
||||
case 'A':
|
||||
advert++;
|
||||
unsolicited++;
|
||||
cfg.advert = 1;
|
||||
cfg.unsolicited = 1;
|
||||
break;
|
||||
case 'q':
|
||||
quiet++;
|
||||
cfg.quiet = 1;
|
||||
break;
|
||||
case 'c':
|
||||
count = atoi(optarg);
|
||||
@ -304,14 +305,13 @@ int arping_main(int argc, char **argv)
|
||||
if (optarg == NULL)
|
||||
bb_show_usage();
|
||||
if (bb_strlen(optarg) > IF_NAMESIZE) {
|
||||
bb_error_msg("Interface name `%s' must be less than %d", optarg,
|
||||
IF_NAMESIZE);
|
||||
exit(2);
|
||||
bb_error_msg_and_die("Interface name `%s' must be less than %d",
|
||||
optarg, IF_NAMESIZE);
|
||||
}
|
||||
device = optarg;
|
||||
break;
|
||||
case 'f':
|
||||
quit_on_reply = 1;
|
||||
cfg.quit_on_reply = 1;
|
||||
break;
|
||||
case 's':
|
||||
source = optarg;
|
||||
@ -329,11 +329,11 @@ int arping_main(int argc, char **argv)
|
||||
bb_show_usage();
|
||||
|
||||
target = *argv;
|
||||
|
||||
bb_default_error_retval = 2;
|
||||
|
||||
if (s < 0) {
|
||||
bb_error_msg("socket");
|
||||
exit(socket_errno);
|
||||
bb_perror_msg("socket");
|
||||
exit(ifindex);
|
||||
}
|
||||
|
||||
{
|
||||
@ -342,22 +342,19 @@ int arping_main(int argc, char **argv)
|
||||
memset(&ifr, 0, sizeof(ifr));
|
||||
strncpy(ifr.ifr_name, device, IFNAMSIZ - 1);
|
||||
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
|
||||
bb_error_msg("Interface %s not found", device);
|
||||
exit(2);
|
||||
bb_error_msg_and_die("Interface %s not found", device);
|
||||
}
|
||||
ifindex = ifr.ifr_ifindex;
|
||||
|
||||
if (ioctl(s, SIOCGIFFLAGS, (char *) &ifr)) {
|
||||
bb_error_msg("SIOCGIFFLAGS");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("SIOCGIFFLAGS");
|
||||
}
|
||||
if (!(ifr.ifr_flags & IFF_UP)) {
|
||||
bb_error_msg("Interface %s is down", device);
|
||||
exit(2);
|
||||
bb_error_msg_and_die("Interface %s is down", device);
|
||||
}
|
||||
if (ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK)) {
|
||||
bb_error_msg("Interface %s is not ARPable", device);
|
||||
exit(dad ? 0 : 2);
|
||||
exit(cfg.dad ? 0 : 2);
|
||||
}
|
||||
}
|
||||
|
||||
@ -366,27 +363,24 @@ int arping_main(int argc, char **argv)
|
||||
|
||||
hp = gethostbyname2(target, AF_INET);
|
||||
if (!hp) {
|
||||
bb_error_msg("invalid or unknown target %s", target);
|
||||
exit(2);
|
||||
bb_error_msg_and_die("invalid or unknown target %s", target);
|
||||
}
|
||||
memcpy(&dst, hp->h_addr, 4);
|
||||
}
|
||||
|
||||
if (source && !inet_aton(source, &src)) {
|
||||
bb_error_msg("invalid source address %s", source);
|
||||
exit(2);
|
||||
bb_error_msg_and_die("invalid source address %s", source);
|
||||
}
|
||||
|
||||
if (!dad && unsolicited && src.s_addr == 0)
|
||||
if (!cfg.dad && cfg.unsolicited && src.s_addr == 0)
|
||||
src = dst;
|
||||
|
||||
if (!dad || src.s_addr) {
|
||||
if (!cfg.dad || src.s_addr) {
|
||||
struct sockaddr_in saddr;
|
||||
int probe_fd = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
|
||||
if (probe_fd < 0) {
|
||||
bb_error_msg("socket");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("socket");
|
||||
}
|
||||
if (device) {
|
||||
if (setsockopt
|
||||
@ -399,10 +393,9 @@ int arping_main(int argc, char **argv)
|
||||
if (src.s_addr) {
|
||||
saddr.sin_addr = src;
|
||||
if (bind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr)) == -1) {
|
||||
bb_error_msg("bind");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("bind");
|
||||
}
|
||||
} else if (!dad) {
|
||||
} else if (!cfg.dad) {
|
||||
int on = 1;
|
||||
socklen_t alen = sizeof(saddr);
|
||||
|
||||
@ -412,16 +405,14 @@ int arping_main(int argc, char **argv)
|
||||
if (setsockopt
|
||||
(probe_fd, SOL_SOCKET, SO_DONTROUTE, (char *) &on,
|
||||
sizeof(on)) == -1)
|
||||
perror("WARNING: setsockopt(SO_DONTROUTE)");
|
||||
bb_perror_msg("WARNING: setsockopt(SO_DONTROUTE)");
|
||||
if (connect(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr))
|
||||
== -1) {
|
||||
bb_error_msg("connect");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("connect");
|
||||
}
|
||||
if (getsockname(probe_fd, (struct sockaddr *) &saddr, &alen) ==
|
||||
-1) {
|
||||
bb_error_msg("getsockname");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("getsockname");
|
||||
}
|
||||
src = saddr.sin_addr;
|
||||
}
|
||||
@ -432,34 +423,31 @@ int arping_main(int argc, char **argv)
|
||||
me.sll_ifindex = ifindex;
|
||||
me.sll_protocol = htons(ETH_P_ARP);
|
||||
if (bind(s, (struct sockaddr *) &me, sizeof(me)) == -1) {
|
||||
bb_error_msg("bind");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("bind");
|
||||
}
|
||||
|
||||
{
|
||||
socklen_t alen = sizeof(me);
|
||||
|
||||
if (getsockname(s, (struct sockaddr *) &me, &alen) == -1) {
|
||||
bb_error_msg("getsockname");
|
||||
exit(2);
|
||||
bb_error_msg_and_die("getsockname");
|
||||
}
|
||||
}
|
||||
if (me.sll_halen == 0) {
|
||||
bb_error_msg("Interface \"%s\" is not ARPable (no ll address)", device);
|
||||
exit(dad ? 0 : 2);
|
||||
exit(cfg.dad ? 0 : 2);
|
||||
}
|
||||
he = me;
|
||||
memset(he.sll_addr, -1, he.sll_halen);
|
||||
|
||||
if (!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 && !dad) {
|
||||
bb_error_msg("no src address in the non-DAD mode");
|
||||
exit(2);
|
||||
if (!src.s_addr && !cfg.dad) {
|
||||
bb_error_msg_and_die("no src address in the non-DAD mode");
|
||||
}
|
||||
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user