This commit was manufactured by cvs2svn to create tag 'busybox_1_00'.

1 files changed, 472 insertions, 0 deletions

diff --git a/busybox/networking/ping.c b/busybox/networking/ping.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * $Id: ping.c,v 1.56 2004/03/15 08:28:48 andersen Exp $
+ * Mini ping implementation for busybox
+ *
+ * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This version of ping is adapted from the ping in netkit-base 0.10,
+ * which is:
+ *
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Muuss.
+ *
+ * Original copyright notice is retained at the end of this file.
+ */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/time.h>
+#include <sys/times.h>
+#include <sys/signal.h>
+
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/ip_icmp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "busybox.h"
+
+
+static const int DEFDATALEN = 56;
+static const int MAXIPLEN = 60;
+static const int MAXICMPLEN = 76;
+static const int MAXPACKET = 65468;
+#define	MAX_DUP_CHK	(8 * 128)
+static const int MAXWAIT = 10;
+static const int PINGINTERVAL = 1;		/* second */
+
+#define O_QUIET         (1 << 0)
+
+#define	A(bit)		rcvd_tbl[(bit)>>3]	/* identify byte in array */
+#define	B(bit)		(1 << ((bit) & 0x07))	/* identify bit in byte */
+#define	SET(bit)	(A(bit) |= B(bit))
+#define	CLR(bit)	(A(bit) &= (~B(bit)))
+#define	TST(bit)	(A(bit) & B(bit))
+
+static void ping(const char *host);
+
+/* common routines */
+static int in_cksum(unsigned short *buf, int sz)
+{
+	int nleft = sz;
+	int sum = 0;
+	unsigned short *w = buf;
+	unsigned short ans = 0;
+
+	while (nleft > 1) {
+		sum += *w++;
+		nleft -= 2;
+	}
+
+	if (nleft == 1) {
+		*(unsigned char *) (&ans) = *(unsigned char *) w;
+		sum += ans;
+	}
+
+	sum = (sum >> 16) + (sum & 0xFFFF);
+	sum += (sum >> 16);
+	ans = ~sum;
+	return (ans);
+}
+
+/* simple version */
+#ifndef CONFIG_FEATURE_FANCY_PING
+static char *hostname = NULL;
+static void noresp(int ign)
+{
+	printf("No response from %s\n", hostname);
+	exit(EXIT_FAILURE);
+}
+
+static void ping(const char *host)
+{
+	struct hostent *h;
+	struct sockaddr_in pingaddr;
+	struct icmp *pkt;
+	int pingsock, c;
+	char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+
+	pingsock = create_icmp_socket();
+
+	memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+	pingaddr.sin_family = AF_INET;
+	h = xgethostbyname(host);
+	memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
+	hostname = h->h_name;
+
+	pkt = (struct icmp *) packet;
+	memset(pkt, 0, sizeof(packet));
+	pkt->icmp_type = ICMP_ECHO;
+	pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+
+	c = sendto(pingsock, packet, sizeof(packet), 0,
+			   (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+
+	if (c < 0 || c != sizeof(packet))
+		bb_perror_msg_and_die("sendto");
+
+	signal(SIGALRM, noresp);
+	alarm(5);					/* give the host 5000ms to respond */
+	/* listen for replies */
+	while (1) {
+		struct sockaddr_in from;
+		size_t fromlen = sizeof(from);
+
+		if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
+						  (struct sockaddr *) &from, &fromlen)) < 0) {
+			if (errno == EINTR)
+				continue;
+			bb_perror_msg("recvfrom");
+			continue;
+		}
+		if (c >= 76) {			/* ip + icmp */
+			struct iphdr *iphdr = (struct iphdr *) packet;
+
+			pkt = (struct icmp *) (packet + (iphdr->ihl << 2));	/* skip ip hdr */
+			if (pkt->icmp_type == ICMP_ECHOREPLY)
+				break;
+		}
+	}
+	printf("%s is alive!\n", hostname);
+	return;
+}
+
+extern int ping_main(int argc, char **argv)
+{
+	argc--;
+	argv++;
+	if (argc < 1)
+		bb_show_usage();
+	ping(*argv);
+	return EXIT_SUCCESS;
+}
+
+#else /* ! CONFIG_FEATURE_FANCY_PING */
+/* full(er) version */
+static struct sockaddr_in pingaddr;
+static int pingsock = -1;
+static int datalen; /* intentionally uninitialized to work around gcc bug */
+
+static long ntransmitted, nreceived, nrepeats, pingcount;
+static int myid, options;
+static unsigned long tmin = ULONG_MAX, tmax, tsum;
+static char rcvd_tbl[MAX_DUP_CHK / 8];
+
+struct hostent *hostent;
+
+static void sendping(int);
+static void pingstats(int);
+static void unpack(char *, int, struct sockaddr_in *);
+
+/**************************************************************************/
+
+static void pingstats(int junk)
+{
+	int status;
+
+	signal(SIGINT, SIG_IGN);
+
+	printf("\n--- %s ping statistics ---\n", hostent->h_name);
+	printf("%ld packets transmitted, ", ntransmitted);
+	printf("%ld packets received, ", nreceived);
+	if (nrepeats)
+		printf("%ld duplicates, ", nrepeats);
+	if (ntransmitted)
+		printf("%ld%% packet loss\n",
+			   (ntransmitted - nreceived) * 100 / ntransmitted);
+	if (nreceived)
+		printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
+			   tmin / 10, tmin % 10,
+			   (tsum / (nreceived + nrepeats)) / 10,
+			   (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
+	if (nreceived != 0)
+		status = EXIT_SUCCESS;
+	else
+		status = EXIT_FAILURE;
+	exit(status);
+}
+
+static void sendping(int junk)
+{
+	struct icmp *pkt;
+	int i;
+	char packet[datalen + 8];
+
+	pkt = (struct icmp *) packet;
+
+	pkt->icmp_type = ICMP_ECHO;
+	pkt->icmp_code = 0;
+	pkt->icmp_cksum = 0;
+	pkt->icmp_seq = ntransmitted++;
+	pkt->icmp_id = myid;
+	CLR(pkt->icmp_seq % MAX_DUP_CHK);
+
+	gettimeofday((struct timeval *) &packet[8], NULL);
+	pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+
+	i = sendto(pingsock, packet, sizeof(packet), 0,
+			   (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+
+	if (i < 0)
+		bb_perror_msg_and_die("sendto");
+	else if ((size_t)i != sizeof(packet))
+		bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
+			   (int)sizeof(packet));
+
+	signal(SIGALRM, sendping);
+	if (pingcount == 0 || ntransmitted < pingcount) {	/* schedule next in 1s */
+		alarm(PINGINTERVAL);
+	} else {					/* done, wait for the last ping to come back */
+		/* todo, don't necessarily need to wait so long... */
+		signal(SIGALRM, pingstats);
+		alarm(MAXWAIT);
+	}
+}
+
+static char *icmp_type_name (int id)
+{
+	switch (id) {
+	case ICMP_ECHOREPLY: 		return "Echo Reply";
+	case ICMP_DEST_UNREACH: 	return "Destination Unreachable";
+	case ICMP_SOURCE_QUENCH: 	return "Source Quench";
+	case ICMP_REDIRECT: 		return "Redirect (change route)";
+	case ICMP_ECHO: 			return "Echo Request";
+	case ICMP_TIME_EXCEEDED: 	return "Time Exceeded";
+	case ICMP_PARAMETERPROB: 	return "Parameter Problem";
+	case ICMP_TIMESTAMP: 		return "Timestamp Request";
+	case ICMP_TIMESTAMPREPLY: 	return "Timestamp Reply";
+	case ICMP_INFO_REQUEST: 	return "Information Request";
+	case ICMP_INFO_REPLY: 		return "Information Reply";
+	case ICMP_ADDRESS: 			return "Address Mask Request";
+	case ICMP_ADDRESSREPLY: 	return "Address Mask Reply";
+	default: 					return "unknown ICMP type";
+	}
+}
+
+static void unpack(char *buf, int sz, struct sockaddr_in *from)
+{
+	struct icmp *icmppkt;
+	struct iphdr *iphdr;
+	struct timeval tv, *tp;
+	int hlen, dupflag;
+	unsigned long triptime;
+
+	gettimeofday(&tv, NULL);
+
+	/* check IP header */
+	iphdr = (struct iphdr *) buf;
+	hlen = iphdr->ihl << 2;
+	/* discard if too short */
+	if (sz < (datalen + ICMP_MINLEN))
+		return;
+
+	sz -= hlen;
+	icmppkt = (struct icmp *) (buf + hlen);
+
+	if (icmppkt->icmp_id != myid)
+	    return;				/* not our ping */
+
+	if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
+	    ++nreceived;
+		tp = (struct timeval *) icmppkt->icmp_data;
+
+		if ((tv.tv_usec -= tp->tv_usec) < 0) {
+			--tv.tv_sec;
+			tv.tv_usec += 1000000;
+		}
+		tv.tv_sec -= tp->tv_sec;
+
+		triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
+		tsum += triptime;
+		if (triptime < tmin)
+			tmin = triptime;
+		if (triptime > tmax)
+			tmax = triptime;
+
+		if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
+			++nrepeats;
+			--nreceived;
+			dupflag = 1;
+		} else {
+			SET(icmppkt->icmp_seq % MAX_DUP_CHK);
+			dupflag = 0;
+		}
+
+		if (options & O_QUIET)
+			return;
+
+		printf("%d bytes from %s: icmp_seq=%u", sz,
+			   inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
+			   icmppkt->icmp_seq);
+		printf(" ttl=%d", iphdr->ttl);
+		printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
+		if (dupflag)
+			printf(" (DUP!)");
+		printf("\n");
+	} else
+		if (icmppkt->icmp_type != ICMP_ECHO)
+			bb_error_msg("Warning: Got ICMP %d (%s)",
+					icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
+}
+
+static void ping(const char *host)
+{
+	char packet[datalen + MAXIPLEN + MAXICMPLEN];
+	int sockopt;
+
+	pingsock = create_icmp_socket();
+
+	memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+	pingaddr.sin_family = AF_INET;
+	hostent = xgethostbyname(host);
+	if (hostent->h_addrtype != AF_INET)
+		bb_error_msg_and_die("unknown address type; only AF_INET is currently supported.");
+
+	memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr));
+
+	/* enable broadcast pings */
+	sockopt = 1;
+	setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
+			   sizeof(sockopt));
+
+	/* set recv buf for broadcast pings */
+	sockopt = 48 * 1024;
+	setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
+			   sizeof(sockopt));
+
+	printf("PING %s (%s): %d data bytes\n",
+	           hostent->h_name,
+		   inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
+		   datalen);
+
+	signal(SIGINT, pingstats);
+
+	/* start the ping's going ... */
+	sendping(0);
+
+	/* listen for replies */
+	while (1) {
+		struct sockaddr_in from;
+		socklen_t fromlen = (socklen_t) sizeof(from);
+		int c;
+
+		if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
+						  (struct sockaddr *) &from, &fromlen)) < 0) {
+			if (errno == EINTR)
+				continue;
+			bb_perror_msg("recvfrom");
+			continue;
+		}
+		unpack(packet, c, &from);
+		if (pingcount > 0 && nreceived >= pingcount)
+			break;
+	}
+	pingstats(0);
+}
+
+extern int ping_main(int argc, char **argv)
+{
+	char *thisarg;
+
+	datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
+
+	argc--;
+	argv++;
+	options = 0;
+	/* Parse any options */
+	while (argc >= 1 && **argv == '-') {
+		thisarg = *argv;
+		thisarg++;
+		switch (*thisarg) {
+		case 'q':
+			options |= O_QUIET;
+			break;
+		case 'c':
+			if (--argc <= 0)
+			        bb_show_usage();
+			argv++;
+			pingcount = atoi(*argv);
+			break;
+		case 's':
+			if (--argc <= 0)
+			        bb_show_usage();
+			argv++;
+			datalen = atoi(*argv);
+			break;
+		default:
+			bb_show_usage();
+		}
+		argc--;
+		argv++;
+	}
+	if (argc < 1)
+		bb_show_usage();
+
+	myid = getpid() & 0xFFFF;
+	ping(*argv);
+	return EXIT_SUCCESS;
+}
+#endif /* ! CONFIG_FEATURE_FANCY_PING */
+
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Muuss.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
+ *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
+ *
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */