9e5984137

Glenn L McGrath

2003-01-09

SOURCE BUG Duration: 2s

Subject

arping applet by Nick Fedchik

SOURCE BUG

This commit was genuinely broken at the time (not related to our build system): sysdeps/linux/Config.in "fileutils/Config.in" dosyasini kaynak gosteriyor ama bu dosya repoda hic var olmadi (2002-12-05 - 2003-02-15 arasi orijinal yazar hatasi, 3238ea167 ile duzeltildi)

→ Bu hatanin tam hikayesini ve duzeltme diffini gor

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Debian 14.2.0-19) 14.2.0

—

Build Log

(log yok)

Commit Diff GitHub →

include/applets.h +3 -0 include/usage.h +17 -0 networking/Config.in +6 -0 networking/Makefile.in +1 -0 networking/arping.c +492 -0

include/applets.h+3 -0

@@ -58,6 +58,9 @@
	#ifdef CONFIG_AR
	APPLET(ar, ar_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
	#endif
+	#ifdef CONFIG_ARPING
+	APPLET(arping, arping_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+	#endif
	#ifdef CONFIG_ASH
	APPLET_NOUSAGE("ash", ash_main, _BB_DIR_BIN, _BB_SUID_NEVER)
	#endif

include/usage.h+17 -0

@@ -38,6 +38,23 @@
	"\t-x\t\textract\n" \
	"\t-v\t\tverbosely list files processed\n"

+	#define arping_trivial_usage \
+	"[-fqbDUA] [-c count] [-w timeout] [-I device] [-s sender] target\n"
+	#define arping_full_usage \
+	"Ping hosts by ARP requests/replies.\n\n" \
+	"Options:\n" \
+	"\t-f\t\tQuit on first ARP reply\n" \
+	"\t-q\t\tBe quiet\n" \
+	"\t-b\t\tKeep broadcasting, don't go unicast\n" \
+	"\t-D\t\tDuplicated address detection mode\n" \
+	"\t-U\t\tUnsolicited ARP mode, update your neighbours\n" \
+	"\t-A\t\tARP answer mode, update your neighbours\n" \
+	"\t-c count\tStop after sending count ARP request packets\n" \
+	"\t-w timeout\tTime to wait for ARP reply, in seconds\n" \
+	"\t-I device\tOutgoing interface name, default is eth0\n" \
+	"\t-s sender\tSet specific sender IP address\n" \
+	"\ttarget\t\tTarget IP address of ARP request\n"
+
	#define awk_trivial_usage \
	"[-v var=val][-F sep] { -f progname \| 'programtext' } [FILE ...]"
	#define awk_full_usage \

networking/Config.in+6 -0

@@ -11,6 +11,12 @@ config CONFIG_FEATURE_IPV6
	help
	Please submit a patch to add help text for this item.

+	config CONFIG_ARPING
+	bool "arping"
+	default n
+	help
+	Ping hosts by ARP packets
+
	config CONFIG_FTPGET
	bool "ftpget"
	default n

networking/Makefile.in+1 -0

@@ -23,6 +23,7 @@ NETWORKING_DIR:=$(TOPDIR)networking/
	endif

	NETWORKING-y:=
+	NETWORKING-$(CONFIG_ARPING) += arping.o
	NETWORKING-$(CONFIG_FTPGET) += ftpgetput.o
	NETWORKING-$(CONFIG_FTPPUT) += ftpgetput.o
	NETWORKING-$(CONFIG_HOSTNAME) += hostname.o

networking/arping.c+492 -0

@@ -0,0 +1,492 @@
+	/*
+	* 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.
+	*
+	* Author: Alexey Kuznetsov <[email protected]>
+	* Busybox port: Nick Fedchik <[email protected]>
+	*/
+
+	#include <sys/ioctl.h>
+	#include <sys/signal.h>
+	#include <sys/time.h>
+
+	#include <errno.h>
+	#include <stdlib.h>
+	#include <string.h>
+	#include <unistd.h>
+
+	#include <arpa/inet.h>
+	#include <net/if.h>
+	#include <netinet/ether.h>
+	#include <netpacket/packet.h>
+
+	#include "busybox.h"
+
+	#define APPLET_NAME "arping"
+
+	struct in_addr src;
+	struct in_addr dst;
+	struct sockaddr_ll me;
+	struct sockaddr_ll he;
+	struct timeval last;
+	int dad;
+	int unsolicited;
+	int advert;
+	int quiet;
+	int quit_on_reply = 0;
+	int count = -1;
+	int timeout;
+	int unicasting;
+	int s;
+	int broadcast_only;
+	int sent;
+	int brd_sent;
+	int received;
+	int brd_recv;
+	int req_recv;
+
+	#define MS_TDIFF(tv1,tv2) ( ((tv1).tv_sec-(tv2).tv_sec)*1000 + \
+	((tv1).tv_usec-(tv2).tv_usec)/1000 )
+	#if 0
+	static void set_signal(int signo, void (*handler) (void))
+	{
+	struct sigaction sa;
+
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = (void (*)(int)) handler;
+	sa.sa_flags = SA_RESTART;
+	sigaction(signo, &sa, NULL);
+	}
+	#endif
+
+	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;
+	unsigned char buf[256];
+	struct arphdr ah = (struct arphdr ) buf;
+	unsigned char p = (unsigned char ) (ah + 1);
+
+	ah->ar_hrd = htons(ME->sll_hatype);
+	ah->ar_hrd = htons(ARPHRD_ETHER);
+	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);
+
+	memcpy(p, &ME->sll_addr, ah->ar_hln);
+	p += ME->sll_halen;
+
+	memcpy(p, src_addr, 4);
+	p += 4;
+
+	if (advert)
+	memcpy(p, &ME->sll_addr, ah->ar_hln);
+	else
+	memcpy(p, &HE->sll_addr, ah->ar_hln);
+	p += ah->ar_hln;
+
+	memcpy(p, dst_addr, 4);
+	p += 4;
+
+	gettimeofday(&now, NULL);
+	err = sendto(sock, buf, p - buf, 0, (struct sockaddr ) HE, sizeof(HE));
+	if (err == p - buf) {
+	last = now;
+	sent++;
+	if (!unicasting)
+	brd_sent++;
+	}
+	return err;
+	}
+
+	void finish(void)
+	{
+	if (!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) {
+	printf(" (");
+	if (req_recv)
+	printf("%d request(s)", req_recv);
+	if (brd_recv)
+	printf("%s%d broadcast(s)", req_recv ? ", " : "", brd_recv);
+	putchar(')');
+	}
+	putchar('\n');
+	fflush(stdout);
+	}
+	if (dad)
+	exit(!!received);
+	if (unsolicited)
+	exit(0);
+	exit(!received);
+	}
+
+	void catcher(void)
+	{
+	struct timeval tv;
+	struct timeval start;
+
+	gettimeofday(&tv, NULL);
+
+	if (start.tv_sec == 0)
+	start = tv;
+
+	if (count-- == 0
+	\|\| (timeout && MS_TDIFF(tv, start) > timeout * 1000 + 500))
+	finish();
+
+	if (last.tv_sec == 0 \|\| MS_TDIFF(tv, last) > 500) {
+	send_pack(s, &src, &dst, &me, &he);
+	if (count == 0 && unsolicited)
+	finish();
+	}
+	alarm(1);
+	}
+
+	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 &&
+	FROM->sll_pkttype != PACKET_MULTICAST)
+	return 0;
+
+	/* Only these types are recognised */
+	if (ah->ar_op != htons(ARPOP_REQUEST) && ah->ar_op != htons(ARPOP_REPLY))
+	return 0;
+
+	/* ARPHRD check and this darned FDDI hack here :-( */
+	if (ah->ar_hrd != htons(FROM->sll_hatype) &&
+	(FROM->sll_hatype != ARPHRD_FDDI
+	\|\| ah->ar_hrd != htons(ARPHRD_ETHER)))
+	return 0;
+
+	/* Protocol must be IP. */
+	if (ah->ar_pro != htons(ETH_P_IP))
+	return 0;
+	if (ah->ar_pln != 4)
+	return 0;
+	if (ah->ar_hln != me.sll_halen)
+	return 0;
+	if (len < sizeof(ah) + 2 (4 + ah->ar_hln))
+	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 (src_ip.s_addr != dst.s_addr)
+	return 0;
+	if (src.s_addr != dst_ip.s_addr)
+	return 0;
+	if (memcmp(p + ah->ar_hln + 4, &me.sll_addr, ah->ar_hln))
+	return 0;
+	} else {
+	/* DAD packet was:
+	src_ip = 0 (or some src)
+	src_hw = ME
+	dst_ip = tested address
+	dst_hw = <unspec>
+
+	We fail, if receive request/reply with:
+	src_ip = tested_address
+	src_hw != ME
+	if src_ip in request was not zero, check
+	also that it matches to dst_ip, otherwise
+	dst_ip/dst_hw do not matter.
+	*/
+	if (src_ip.s_addr != dst.s_addr)
+	return 0;
+	if (memcmp(p, &me.sll_addr, me.sll_halen) == 0)
+	return 0;
+	if (src.s_addr && src.s_addr != dst_ip.s_addr)
+	return 0;
+	}
+	if (!quiet) {
+	int s_printed = 0;
+
+	printf("%s ",
+	FROM->sll_pkttype == PACKET_HOST ? "Unicast" : "Broadcast");
+	printf("%s from ",
+	ah->ar_op == htons(ARPOP_REPLY) ? "reply" : "request");
+	printf("%s ", inet_ntoa(src_ip));
+	printf("[%s]", ether_ntoa((struct ether_addr *) p));
+	if (dst_ip.s_addr != src.s_addr) {
+	printf("for %s ", inet_ntoa(dst_ip));
+	s_printed = 1;
+	}
+	if (memcmp(p + ah->ar_hln + 4, me.sll_addr, ah->ar_hln)) {
+	if (!s_printed)
+	printf("for ");
+	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;
+	long msecs = (usecs + 500) / 1000;
+
+	usecs -= msecs * 1000 - 500;
+	printf(" %ld.%03ldms\n", msecs, usecs);
+	} else {
+	printf(" UNSOLICITED?\n");
+	}
+	fflush(stdout);
+	}
+	received++;
+	if (FROM->sll_pkttype != PACKET_HOST)
+	brd_recv++;
+	if (ah->ar_op == htons(ARPOP_REQUEST))
+	req_recv++;
+	if (quit_on_reply)
+	finish();
+	if (!broadcast_only) {
+	memcpy(he.sll_addr, p, me.sll_halen);
+	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;
+	char *source = NULL;
+	char *target;
+
+	s = socket(PF_PACKET, SOCK_DGRAM, 0);
+	socket_errno = errno;
+
+	setuid(uid);
+
+	while ((ch = getopt(argc, argv, "h?bfDUAqc:w:s:I")) != EOF) {
+	switch (ch) {
+	case 'b':
+	broadcast_only = 1;
+	break;
+	case 'D':
+	dad++;
+	quit_on_reply = 1;
+	break;
+	case 'U':
+	unsolicited++;
+	break;
+	case 'A':
+	advert++;
+	unsolicited++;
+	break;
+	case 'q':
+	quiet++;
+	break;
+	case 'c':
+	count = atoi(optarg);
+	break;
+	case 'w':
+	timeout = atoi(optarg);
+	break;
+	case 'I':
+	device = optarg;
+	break;
+	case 'f':
+	quit_on_reply = 1;
+	break;
+	case 's':
+	source = optarg;
+	break;
+	case 'h':
+	case '?':
+	default:
+	show_usage();
+	}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+	show_usage();
+
+	target = *argv;
+
+	if (device == NULL) {
+	error_msg("-I <interface> is required!");
+	exit(1);
+	}
+
+	if (s < 0) {
+	error_msg("socket");
+	exit(socket_errno);
+	}
+
+	if (1) {
+	struct ifreq ifr;
+
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, device, IFNAMSIZ - 1);
+	if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
+	error_msg("unknown interface %s", device);
+	exit(2);
+	}
+	ifindex = ifr.ifr_ifindex;
+
+	if (ioctl(s, SIOCGIFFLAGS, (char *) &ifr)) {
+	error_msg("SIOCGIFFLAGS");
+	exit(2);
+	}
+	if (!(ifr.ifr_flags & IFF_UP)) {
+	error_msg("Interface \"%s\" is down", device);
+	exit(2);
+	}
+	if (ifr.ifr_flags & (IFF_NOARP \| IFF_LOOPBACK)) {
+	error_msg("Interface \"%s\" is not ARPable", device);
+	exit(dad ? 0 : 2);
+	}
+	}
+
+	if (inet_aton(target, &dst) != 1) {
+	struct hostent *hp;
+
+	hp = gethostbyname2(target, AF_INET);
+	if (!hp) {
+	error_msg("invalid or unknown target %s", target);
+	exit(2);
+	}
+	memcpy(&dst, hp->h_addr, 4);
+	}
+
+	if (source && inet_aton(source, &src) != 1) {
+	error_msg("invalid source address %s", source);
+	exit(2);
+	}
+
+	if (!dad && unsolicited && src.s_addr == 0)
+	src = dst;
+
+	if (!dad \|\| src.s_addr) {
+	struct sockaddr_in saddr;
+	int probe_fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+	if (probe_fd < 0) {
+	error_msg("socket");
+	exit(2);
+	}
+	if (device) {
+	if (setsockopt
+	(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device,
+	strlen(device) + 1) == -1)
+	perror("WARNING: interface is ignored");
+	}
+	memset(&saddr, 0, sizeof(saddr));
+	saddr.sin_family = AF_INET;
+	if (src.s_addr) {
+	saddr.sin_addr = src;
+	if (bind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr)) == -1) {
+	error_msg("bind");
+	exit(2);
+	}
+	} else if (!dad) {
+	int on = 1;
+	int alen = sizeof(saddr);
+
+	saddr.sin_port = htons(1025);
+	saddr.sin_addr = dst;
+
+	if (setsockopt
+	(probe_fd, SOL_SOCKET, SO_DONTROUTE, (char *) &on,
+	sizeof(on)) == -1)
+	perror("WARNING: setsockopt(SO_DONTROUTE)");
+	if (connect(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr))
+	== -1) {
+	error_msg("connect");
+	exit(2);
+	}
+	if (getsockname(probe_fd, (struct sockaddr *) &saddr, &alen) ==
+	-1) {
+	error_msg("getsockname");
+	exit(2);
+	}
+	src = saddr.sin_addr;
+	}
+	close(probe_fd);
+	};
+
+	me.sll_family = AF_PACKET;
+	me.sll_ifindex = ifindex;
+	me.sll_protocol = htons(ETH_P_ARP);
+	if (bind(s, (struct sockaddr *) &me, sizeof(me)) == -1) {
+	error_msg("bind");
+	exit(2);
+	}
+
+	if (1) {
+	int alen = sizeof(me);
+
+	if (getsockname(s, (struct sockaddr *) &me, &alen) == -1) {
+	error_msg("getsockname");
+	exit(2);
+	}
+	}
+	if (me.sll_halen == 0) {
+	error_msg("Interface \"%s\" is not ARPable (no ll address)", device);
+	exit(dad ? 0 : 2);
+	}
+	he = me;
+	memset(he.sll_addr, -1, he.sll_halen);
+
+	if (!quiet)
+	printf("ARPING to %s from %s via %s\n", inet_ntoa(dst),
+	inet_ntoa(src), device ? device : "unknown");
+
+	if (!src.s_addr && !dad) {
+	error_msg("no src address in the non-DAD mode");
+	exit(2);
+	}
+
+	{
+	struct sigaction sa;
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_flags = SA_RESTART;
+
+	sa.sa_handler = (void (*)(int)) finish;
+	sigaction(SIGINT, &sa, NULL);
+
+	sa.sa_handler = (void (*)(int)) catcher;
+	sigaction(SIGALRM, &sa, NULL);
+	}
+
+	catcher();
+
+	while (1) {
+	sigset_t sset, osset;
+	char packet[4096];
+	struct sockaddr_ll from;
+	int alen = sizeof(from);
+	int cc;
+
+	if ((cc = recvfrom(s, packet, sizeof(packet), 0,
+	(struct sockaddr *) &from, &alen)) < 0) {
+	perror("recvfrom");
+	continue;
+	}
+	sigemptyset(&sset);
+	sigaddset(&sset, SIGALRM);
+	sigaddset(&sset, SIGINT);
+	sigprocmask(SIG_BLOCK, &sset, &osset);
+	recv_pack(packet, cc, &from);
+	sigprocmask(SIG_SETMASK, &osset, NULL);
+	}
+	}