diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..c1c351d
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,11 @@
+ifneq ($(TARGET_SIMULATOR),true)
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES:= ping.c
+LOCAL_MODULE := ping
+LOCAL_STATIC_LIBRARIES := libcutils libc
+include $(BUILD_EXECUTABLE)
+
+endif  # TARGET_SIMULATOR != true
diff --git a/ping.c b/ping.c
new file mode 100644
index 0000000..2afca98
--- /dev/null
+++ b/ping.c
@@ -0,0 +1,2068 @@
+/*
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+/*
+ *			P I N G . C
+ *
+ * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
+ * measure round-trip-delays and packet loss across network paths.
+ *
+ * Author -
+ *	Mike Muuss
+ *	U. S. Army Ballistic Research Laboratory
+ *	December, 1983
+ *
+ * Status -
+ *	Public Domain.  Distribution Unlimited.
+ * Bugs -
+ *	More statistics could always be gathered.
+ *	This program has to run SUID to ROOT to access the ICMP socket.
+ */
+
+#include "ping_common.h"
+
+#include <netinet/ip.h>
+#include <linux/icmp.h>
+#include <sched.h>
+
+#define bzero(b,sz) memset(b, 0, sz)
+
+/* PING COMMON */
+
+int options;
+
+int sndbuf;
+int ttl;
+int rtt;
+int rtt_addend;
+__u16 acked;
+
+int mx_dup_ck = MAX_DUP_CHK;
+char rcvd_tbl[MAX_DUP_CHK / 8];
+
+
+/* counters */
+long npackets;			/* max packets to transmit */
+long nreceived;			/* # of packets we got back */
+long nrepeats;			/* number of duplicates */
+long ntransmitted;		/* sequence # for outbound packets = #sent */
+long nchecksum;			/* replies with bad checksum */
+long nerrors;			/* icmp errors */
+int interval = 1000;		/* interval between packets (msec) */
+int preload;
+int deadline = 0;		/* time to die */
+int lingertime = MAXWAIT*1000;
+struct timeval start_time, cur_time;
+volatile int exiting;
+volatile int status_snapshot;
+int confirm = 0;
+
+/* Stupid workarounds for bugs/missing functionality in older linuces.
+ * confirm_flag fixes refusing service of kernels without MSG_CONFIRM.
+ * i.e. for linux-2.2 */
+int confirm_flag = MSG_CONFIRM;
+/* And this is workaround for bug in IP_RECVERR on raw sockets which is present
+ * in linux-2.2.[0-19], linux-2.4.[0-7] */
+int working_recverr;
+
+/* timing */
+int timing;			/* flag to do timing */
+long tmin = LONG_MAX;		/* minimum round trip time */
+long tmax;			/* maximum round trip time */
+/* Message for rpm maintainers: have _shame_. If you want
+ * to fix something send the patch to me for sanity checking.
+ * "sparcfix" patch is a complete non-sense, apparenly the person
+ * prepared it was stoned.
+ */
+long long tsum;			/* sum of all times, for doing average */
+long long tsum2;
+int  pipesize = -1;
+
+int datalen = DEFDATALEN;
+
+char *hostname;
+int uid;
+int ident;			/* process id to identify our packets */
+
+static int screen_width = INT_MAX;
+
+/* Fills all the outpack, excluding ICMP header, but _including_
+ * timestamp area with supplied pattern.
+ */
+static void fill(char *patp)
+{
+	int ii, jj, kk;
+	int pat[16];
+	char *cp;
+	char *bp = outpack+8;
+
+	for (cp = patp; *cp; cp++) {
+		if (!isxdigit(*cp)) {
+			fprintf(stderr,
+				"ping: patterns must be specified as hex digits.\n");
+			exit(2);
+		}
+	}
+	ii = sscanf(patp,
+	    "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
+	    &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
+	    &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
+	    &pat[13], &pat[14], &pat[15]);
+
+	if (ii > 0) {
+		for (kk = 0; kk <= maxpacket - (8 + ii); kk += ii)
+			for (jj = 0; jj < ii; ++jj)
+				bp[jj + kk] = pat[jj];
+	}
+	if (!(options & F_QUIET)) {
+		printf("PATTERN: 0x");
+		for (jj = 0; jj < ii; ++jj)
+			printf("%02x", bp[jj] & 0xFF);
+		printf("\n");
+	}
+}
+
+void common_options(int ch)
+{
+	switch(ch) {
+	case 'a':
+		options |= F_AUDIBLE;
+		break;
+	case 'A':
+		options |= F_ADAPTIVE;
+		break;
+	case 'c':
+		npackets = atoi(optarg);
+		if (npackets <= 0) {
+			fprintf(stderr, "ping: bad number of packets to transmit.\n");
+			exit(2);
+		}
+		break;
+	case 'd':
+		options |= F_SO_DEBUG;
+		break;
+	case 'f':
+		options |= F_FLOOD;
+		//setbuf(stdout, (char *)NULL);
+		break;
+	case 'i':		/* wait between sending packets */
+	{
+		if (strchr(optarg, '.')) {
+			float t;
+			if (sscanf(optarg, "%f", &t) != 1) {
+				fprintf(stderr, "ping: bad timing interval.\n");
+				exit(2);
+			}
+			interval = (int)(t*1000);
+		} else if (sscanf(optarg, "%d", &interval) == 1) {
+			interval *= 1000;
+		} else {
+			fprintf(stderr, "ping: bad timing interval.\n");
+			exit(2);
+		}
+
+		if (interval < 0) {
+			fprintf(stderr, "ping: bad timing interval.\n");
+			exit(2);
+		}
+		options |= F_INTERVAL;
+		break;
+	}
+	case 'w':
+		deadline = atoi(optarg);
+		if (deadline < 0) {
+			fprintf(stderr, "ping: bad wait time.\n");
+			exit(2);
+		}
+		break;
+	case 'l':
+		preload = atoi(optarg);
+		if (preload <= 0) {
+			fprintf(stderr, "ping: bad preload value, should be 1..%d\n", mx_dup_ck);
+			exit(2);
+		}
+		if (preload > mx_dup_ck)
+			preload = mx_dup_ck;
+		if (uid && preload > 3) {
+			fprintf(stderr, "ping: cannot set preload to value > 3\n");
+			exit(2);
+		}
+		break;
+	case 'S':
+		sndbuf = atoi(optarg);
+		if (sndbuf <= 0) {
+			fprintf(stderr, "ping: bad sndbuf value.\n");
+			exit(2);
+		}
+		break;
+	case 'n':
+		options |= F_NUMERIC;
+		break;
+	case 'p':		/* fill buffer with user pattern */
+		options |= F_PINGFILLED;
+		fill(optarg);
+		break;
+	case 'q':
+		options |= F_QUIET;
+		break;
+	case 'r':
+		options |= F_SO_DONTROUTE;
+		break;
+	case 's':		/* size of packet to send */
+		datalen = atoi(optarg);
+		if (datalen < 0) {
+			fprintf(stderr, "ping: illegal negative packet size %d.\n", datalen);
+			exit(2);
+		}
+		break;
+	case 'v':
+		options |= F_VERBOSE;
+		break;
+	case 'L':
+		options |= F_NOLOOP;
+		break;
+	case 't':
+		options |= F_TTL;
+		ttl = atoi(optarg);
+		if (ttl < 0 || ttl > 255) {
+			fprintf(stderr, "ping: ttl %u out of range\n", ttl);
+			exit(2);
+		}
+		break;
+	case 'U':
+		options |= F_LATENCY;
+		break;
+	case 'B':
+		options |= F_STRICTSOURCE;
+		break;
+	case 'W':
+		lingertime = atoi(optarg);
+		if (lingertime < 0 || lingertime > INT_MAX/1000000) {
+			fprintf(stderr, "ping: bad linger time.\n");
+			exit(2);
+		}
+		lingertime *= 1000;
+		break;
+	case 'V':
+		printf("ping utility, iputils-ss\n");
+		exit(0);
+	default:
+		abort();
+	}
+}
+
+
+static void sigexit(int signo)
+{
+	exiting = 1;
+}
+
+static void sigstatus(int signo)
+{
+	status_snapshot = 1;
+}
+
+
+int __schedule_exit(int next)
+{
+	static unsigned long waittime;
+	struct itimerval it;
+
+	if (waittime)
+		return next;
+
+	if (nreceived) {
+		waittime = 2 * tmax;
+		if (waittime < 1000*interval)
+			waittime = 1000*interval;
+	} else
+		waittime = lingertime*1000;
+
+	if (next < 0 || next < waittime/1000)
+		next = waittime/1000;
+
+	it.it_interval.tv_sec = 0;
+	it.it_interval.tv_usec = 0;
+	it.it_value.tv_sec = waittime/1000000;
+	it.it_value.tv_usec = waittime%1000000;
+	setitimer(ITIMER_REAL, &it, NULL);
+	return next;
+}
+
+static inline void update_interval(void)
+{
+	int est = rtt ? rtt/8 : interval*1000; 
+
+	interval = (est+rtt_addend+500)/1000;
+	if (uid && interval < MINUSERINTERVAL)
+		interval = MINUSERINTERVAL;
+}
+
+/*
+ * pinger --
+ * 	Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
+ * will be added on by the kernel.  The ID field is our UNIX process ID,
+ * and the sequence number is an ascending integer.  The first 8 bytes
+ * of the data portion are used to hold a UNIX "timeval" struct in VAX
+ * byte-order, to compute the round-trip time.
+ */
+int pinger(void)
+{
+	static int oom_count;
+	static int tokens;
+	int i;
+
+	/* Have we already sent enough? If we have, return an arbitrary positive value. */ 
+	if (exiting || (npackets && ntransmitted >= npackets && !deadline))
+		return 1000;
+
+	/* Check that packets < rate*time + preload */
+	if (cur_time.tv_sec == 0) {
+		gettimeofday(&cur_time, NULL);
+		tokens = interval*(preload-1);
+	} else {
+		long ntokens;
+		struct timeval tv;
+
+		gettimeofday(&tv, NULL);
+		ntokens = (tv.tv_sec - cur_time.tv_sec)*1000 +
+			(tv.tv_usec-cur_time.tv_usec)/1000;
+		if (!interval) {
+			/* Case of unlimited flood is special;
+			 * if we see no reply, they are limited to 100pps */
+			if (ntokens < MININTERVAL && in_flight() >= preload)
+				return MININTERVAL-ntokens;
+		}
+		ntokens += tokens;
+		if (ntokens > interval*preload)
+			ntokens = interval*preload;
+		if (ntokens < interval)
+			return interval - ntokens;
+
+		cur_time = tv;
+		tokens = ntokens - interval;
+	}
+
+resend:
+	i = send_probe();
+
+	if (i == 0) {
+		oom_count = 0;
+		advance_ntransmitted();
+		if (!(options & F_QUIET) && (options & F_FLOOD)) {
+			/* Very silly, but without this output with
+			 * high preload or pipe size is very confusing. */
+			if ((preload < screen_width && pipesize < screen_width) ||
+			    in_flight() < screen_width)
+				write(STDOUT_FILENO, ".", 1);
+		}
+		return interval - tokens;
+	}
+
+	/* And handle various errors... */
+	if (i > 0) {
+		/* Apparently, it is some fatal bug. */
+		abort();
+	} else if (errno == ENOBUFS || errno == ENOMEM) {
+		int nores_interval;
+
+		/* Device queue overflow or OOM. Packet is not sent. */
+		tokens = 0;
+		/* Slowdown. This works only in adaptive mode (option -A) */
+		rtt_addend += (rtt < 8*50000 ? rtt/8 : 50000);
+		if (options&F_ADAPTIVE)
+			update_interval();
+		nores_interval = SCHINT(interval/2);
+		if (nores_interval > 500)
+			nores_interval = 500;
+		oom_count++;
+		if (oom_count*nores_interval < lingertime)
+			return nores_interval;
+		i = 0;
+		/* Fall to hard error. It is to avoid complete deadlock
+		 * on stuck output device even when dealine was not requested.
+		 * Expected timings are screwed up in any case, but we will
+		 * exit some day. :-) */
+	} else if (errno == EAGAIN) {
+		/* Socket buffer is full. */
+		tokens += interval;
+		return MININTERVAL;
+	} else {
+		if ((i=receive_error_msg()) > 0) {
+			/* An ICMP error arrived. */
+			tokens += interval;
+			return MININTERVAL;
+		}
+		/* Compatibility with old linuces. */
+		if (i == 0 && confirm_flag && errno == EINVAL) {
+			confirm_flag = 0;
+			errno = 0;
+		}
+		if (!errno)
+			goto resend;
+	}
+
+	/* Hard local error. Pretend we sent packet. */
+	advance_ntransmitted();
+
+	if (i == 0 && !(options & F_QUIET)) {
+		if (options & F_FLOOD)
+			write(STDOUT_FILENO, "E", 1);
+		else
+			perror("ping: sendmsg");
+	}
+	tokens = 0;
+	return SCHINT(interval);
+}
+
+/* Set socket buffers, "alloc" is an estimate of memory taken by single packet. */
+
+void sock_setbufs(int icmp_sock, int alloc)
+{
+	int rcvbuf, hold;
+	int tmplen = sizeof(hold);
+
+	if (!sndbuf)
+		sndbuf = alloc;
+	setsockopt(icmp_sock, SOL_SOCKET, SO_SNDBUF, (char *)&sndbuf, sizeof(sndbuf));
+
+	rcvbuf = hold = alloc * preload;
+	if (hold < 65536)
+		hold = 65536;
+	setsockopt(icmp_sock, SOL_SOCKET, SO_RCVBUF, (char *)&hold, sizeof(hold));
+	if (getsockopt(icmp_sock, SOL_SOCKET, SO_RCVBUF, (char *)&hold, &tmplen) == 0) {
+		if (hold < rcvbuf)
+			fprintf(stderr, "WARNING: probably, rcvbuf is not enough to hold preload.\n");
+	}
+}
+
+/* Protocol independent setup and parameter checks. */
+
+void setup(int icmp_sock)
+{
+	int hold;
+	struct timeval tv;
+
+	if ((options & F_FLOOD) && !(options & F_INTERVAL))
+		interval = 0;
+
+	if (uid && interval < MINUSERINTERVAL) {
+		fprintf(stderr, "ping: cannot flood; minimal interval, allowed for user, is %dms\n", MINUSERINTERVAL);
+		exit(2);
+	}
+
+	if (interval >= INT_MAX/preload) {
+		fprintf(stderr, "ping: illegal preload and/or interval\n");
+		exit(2);
+	}
+
+	hold = 1;
+	if (options & F_SO_DEBUG)
+		setsockopt(icmp_sock, SOL_SOCKET, SO_DEBUG, (char *)&hold, sizeof(hold));
+	if (options & F_SO_DONTROUTE)
+		setsockopt(icmp_sock, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, sizeof(hold));
+
+#ifdef SO_TIMESTAMP
+	if (!(options&F_LATENCY)) {
+		int on = 1;
+		if (setsockopt(icmp_sock, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)))
+			fprintf(stderr, "Warning: no SO_TIMESTAMP support, falling back to SIOCGSTAMP\n");
+	}
+#endif
+
+	/* Set some SNDTIMEO to prevent blocking forever
+	 * on sends, when device is too slow or stalls. Just put limit
+	 * of one second, or "interval", if it is less.
+	 */
+	tv.tv_sec = 1;
+	tv.tv_usec = 0;
+	if (interval < 1000) {
+		tv.tv_sec = 0;
+		tv.tv_usec = 1000 * SCHINT(interval);
+	}
+	setsockopt(icmp_sock, SOL_SOCKET, SO_SNDTIMEO, (char*)&tv, sizeof(tv));
+
+	/* Set RCVTIMEO to "interval". Note, it is just an optimization
+	 * allowing to avoid redundant poll(). */
+	tv.tv_sec = SCHINT(interval)/1000;
+	tv.tv_usec = 1000*(SCHINT(interval)%1000);
+	if (setsockopt(icmp_sock, SOL_SOCKET, SO_RCVTIMEO, (char*)&tv, sizeof(tv)))
+		options |= F_FLOOD_POLL;
+
+	if (!(options & F_PINGFILLED)) {
+		int i;
+		char *p = outpack+8;
+
+		/* Do not forget about case of small datalen,
+		 * fill timestamp area too!
+		 */
+		for (i = 0; i < datalen; ++i)
+			*p++ = i;
+	}
+
+	ident = getpid() & 0xFFFF;
+
+	set_signal(SIGINT, sigexit);
+	set_signal(SIGALRM, sigexit);
+	set_signal(SIGQUIT, sigstatus);
+
+	gettimeofday(&start_time, NULL);
+
+	if (deadline) {
+		struct itimerval it;
+
+		it.it_interval.tv_sec = 0;
+		it.it_interval.tv_usec = 0;
+		it.it_value.tv_sec = deadline;
+		it.it_value.tv_usec = 0;
+		setitimer(ITIMER_REAL, &it, NULL);
+	}
+
+#if 0
+	if (isatty(STDOUT_FILENO)) {
+		struct winsize w;
+
+		if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
+			if (w.ws_col > 0)
+				screen_width = w.ws_col;
+		}
+	}
+#endif
+}
+
+void main_loop(int icmp_sock, __u8 *packet, int packlen)
+{
+	char addrbuf[128];
+	char ans_data[4096];
+	struct iovec iov;
+	struct msghdr msg;
+	struct cmsghdr *c;
+	int cc;
+	int next;
+	int polling;
+
+	iov.iov_base = (char *)packet;
+
+	for (;;) {
+		/* Check exit conditions. */
+		if (exiting)
+			break;
+		if (npackets && nreceived + nerrors >= npackets)
+			break;
+		if (deadline && nerrors)
+			break;
+		/* Check for and do special actions. */
+		if (status_snapshot)
+			status();
+
+		/* Send probes scheduled to this time. */
+		do {
+			next = pinger();
+			next = schedule_exit(next);
+		} while (next <= 0);
+
+		/* "next" is time to send next probe, if positive.
+		 * If next<=0 send now or as soon as possible. */
+
+		/* Technical part. Looks wicked. Could be dropped,
+		 * if everyone used the newest kernel. :-) 
+		 * Its purpose is:
+		 * 1. Provide intervals less than resolution of scheduler.
+		 *    Solution: spinning.
+		 * 2. Avoid use of poll(), when recvmsg() can provide
+		 *    timed waiting (SO_RCVTIMEO). */
+		polling = 0;
+		if ((options & (F_ADAPTIVE|F_FLOOD_POLL)) || next<SCHINT(interval)) {
+			int recv_expected = in_flight();
+
+			/* If we are here, recvmsg() is unable to wait for
+			 * required timeout. */ 
+			if (1000*next <= 1000000/(int)HZ) {
+				/* Very short timeout... So, if we wait for
+				 * something, we sleep for MININTERVAL.
+				 * Otherwise, spin! */
+				if (recv_expected) {
+					next = MININTERVAL;
+				} else {
+					next = 0;
+					/* When spinning, no reasons to poll.
+					 * Use nonblocking recvmsg() instead. */
+					polling = MSG_DONTWAIT;
+					/* But yield yet. */
+					sched_yield();
+				}
+			}
+
+			if (!polling &&
+			    ((options & (F_ADAPTIVE|F_FLOOD_POLL)) || interval)) {
+				struct pollfd pset;
+				pset.fd = icmp_sock;
+				pset.events = POLLIN|POLLERR;
+				pset.revents = 0;
+				if (poll(&pset, 1, next) < 1 ||
+				    !(pset.revents&(POLLIN|POLLERR)))
+					continue;
+				polling = MSG_DONTWAIT;
+			}
+		}
+
+		for (;;) {
+			struct timeval *recv_timep = NULL;
+			struct timeval recv_time;
+			int not_ours = 0; /* Raw socket can receive messages
+					   * destined to other running pings. */
+
+			iov.iov_len = packlen;
+			msg.msg_name = addrbuf;
+			msg.msg_namelen = sizeof(addrbuf);
+			msg.msg_iov = &iov;
+			msg.msg_iovlen = 1;
+			msg.msg_control = ans_data;
+			msg.msg_controllen = sizeof(ans_data);
+
+			cc = recvmsg(icmp_sock, &msg, polling);
+			polling = MSG_DONTWAIT;
+
+			if (cc < 0) {
+				if (errno == EAGAIN || errno == EINTR)
+					break;
+				if (!receive_error_msg()) {
+					if (errno) {
+						perror("ping: recvmsg");
+						break;
+					}
+					not_ours = 1;
+				}
+			} else {
+
+#ifdef SO_TIMESTAMP
+				for (c = CMSG_FIRSTHDR(&msg); c; c = CMSG_NXTHDR(&msg, c)) {
+					if (c->cmsg_level != SOL_SOCKET ||
+					    c->cmsg_type != SO_TIMESTAMP)
+						continue;
+					if (c->cmsg_len < CMSG_LEN(sizeof(struct timeval)))
+						continue;
+					recv_timep = (struct timeval*)CMSG_DATA(c);
+				}
+#endif
+
+				if ((options&F_LATENCY) || recv_timep == NULL) {
+					if ((options&F_LATENCY) ||
+					    ioctl(icmp_sock, SIOCGSTAMP, &recv_time))
+						gettimeofday(&recv_time, NULL);
+					recv_timep = &recv_time;
+				}
+
+				not_ours = parse_reply(&msg, cc, addrbuf, recv_timep);
+			}
+
+			/* See? ... someone runs another ping on this host. */ 
+			if (not_ours)
+				install_filter();
+
+			/* If nothing is in flight, "break" returns us to pinger. */
+			if (in_flight() == 0)
+				break;
+
+			/* Otherwise, try to recvmsg() again. recvmsg()
+			 * is nonblocking after the first iteration, so that
+			 * if nothing is queued, it will receive EAGAIN
+			 * and return to pinger. */
+		}
+	}
+	finish();
+}
+
+int gather_statistics(__u8 *ptr, int cc, __u16 seq, int hops,
+		      int csfailed, struct timeval *tv, char *from)
+{
+	int dupflag = 0;
+	long triptime = 0;
+
+	++nreceived;
+	if (!csfailed)
+		acknowledge(seq);
+
+	if (timing && cc >= 8+sizeof(struct timeval)) {
+		struct timeval tmp_tv;
+		memcpy(&tmp_tv, ptr, sizeof(tmp_tv));
+
+restamp:
+		tvsub(tv, &tmp_tv);
+		triptime = tv->tv_sec * 1000000 + tv->tv_usec;
+		if (triptime < 0) {
+			fprintf(stderr, "Warning: time of day goes back (%ldus), taking countermeasures.\n", triptime);
+			triptime = 0;
+			if (!(options & F_LATENCY)) {
+				gettimeofday(tv, NULL);
+				options |= F_LATENCY;
+				goto restamp;
+			}
+		}
+		if (!csfailed) {
+			tsum += triptime;
+			tsum2 += (long long)triptime * (long long)triptime;
+			if (triptime < tmin)
+				tmin = triptime;
+			if (triptime > tmax)
+				tmax = triptime;
+			if (!rtt)
+				rtt = triptime*8;
+			else
+				rtt += triptime-rtt/8;
+			if (options&F_ADAPTIVE)
+				update_interval();
+		}
+	}
+
+	if (csfailed) {
+		++nchecksum;
+		--nreceived;
+	} else if (TST(seq % mx_dup_ck)) {
+		++nrepeats;
+		--nreceived;
+		dupflag = 1;
+	} else {
+		SET(seq % mx_dup_ck);
+		dupflag = 0;
+	}
+	confirm = confirm_flag;
+
+	if (options & F_QUIET)
+		return 1;
+
+	if (options & F_FLOOD) {
+		if (!csfailed)
+			write(STDOUT_FILENO, "\b \b", 3);
+		else
+			write(STDOUT_FILENO, "\bC", 1);
+	} else {
+		int i;
+		__u8 *cp, *dp;
+		printf("%d bytes from %s: icmp_seq=%u", cc, from, seq);
+
+		if (hops >= 0)
+			printf(" ttl=%d", hops);
+
+		if (cc < datalen+8) {
+			printf(" (truncated)\n");
+			return 1;
+		}
+		if (timing) {
+			if (triptime >= 100000)
+				printf(" time=%ld ms", triptime/1000);
+			else if (triptime >= 10000)
+				printf(" time=%ld.%01ld ms", triptime/1000,
+				       (triptime%1000)/100);
+			else if (triptime >= 1000)
+				printf(" time=%ld.%02ld ms", triptime/1000,
+				       (triptime%1000)/10);
+			else
+				printf(" time=%ld.%03ld ms", triptime/1000,
+				       triptime%1000);
+		}
+		if (dupflag)
+			printf(" (DUP!)");
+		if (csfailed)
+			printf(" (BAD CHECKSUM!)");
+
+		/* check the data */
+		cp = ((u_char*)ptr) + sizeof(struct timeval);
+		dp = &outpack[8 + sizeof(struct timeval)];
+		for (i = sizeof(struct timeval); i < datalen; ++i, ++cp, ++dp) {
+			if (*cp != *dp) {
+				printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
+				       i, *dp, *cp);
+				cp = (u_char*)ptr + sizeof(struct timeval);
+				for (i = sizeof(struct timeval); i < datalen; ++i, ++cp) {
+					if ((i % 32) == sizeof(struct timeval))
+						printf("\n#%d\t", i);
+					printf("%x ", *cp);
+				}
+				break;
+			}
+		}
+	}
+	return 0;
+}
+
+static long llsqrt(long long a)
+{
+	long long prev = ~((long long)1 << 63);
+	long long x = a;
+
+	if (x > 0) {
+		while (x < prev) {
+			prev = x;
+			x = (x+(a/x))/2;
+		}
+	}
+
+	return (long)x;
+}
+
+/*
+ * finish --
+ *	Print out statistics, and give up.
+ */
+void finish(void)
+{
+	struct timeval tv = cur_time;
+
+	tvsub(&tv, &start_time);
+
+	putchar('\n');
+	fflush(stdout);
+	printf("--- %s ping statistics ---\n", hostname);
+	printf("%ld packets transmitted, ", ntransmitted);
+	printf("%ld received", nreceived);
+	if (nrepeats)
+		printf(", +%ld duplicates", nrepeats);
+	if (nchecksum)
+		printf(", +%ld corrupted", nchecksum);
+	if (nerrors)
+		printf(", +%ld errors", nerrors);
+	if (ntransmitted) {
+		printf(", %d%% packet loss",
+		       (int) ((((long long)(ntransmitted - nreceived)) * 100) /
+			      ntransmitted));
+		printf(", time %ldms", 1000*tv.tv_sec+tv.tv_usec/1000);
+	}
+	putchar('\n');
+
+	if (nreceived && timing) {
+		long tmdev;
+
+		tsum /= nreceived + nrepeats;
+		tsum2 /= nreceived + nrepeats;
+		tmdev = llsqrt(tsum2 - tsum * tsum);
+
+		printf("rtt min/avg/max/mdev = %ld.%03ld/%lu.%03ld/%ld.%03ld/%ld.%03ld ms",
+		       tmin/1000, tmin%1000,
+		       (unsigned long)(tsum/1000), (long)(tsum%1000),
+		       tmax/1000, tmax%1000,
+		       tmdev/1000, tmdev%1000
+		       );
+	}
+	if (pipesize > 1)
+		printf(", pipe %d", pipesize);
+	if (ntransmitted > 1 && (!interval || (options&(F_FLOOD|F_ADAPTIVE)))) {
+		int ipg = (1000000*(long long)tv.tv_sec+tv.tv_usec)/(ntransmitted-1);
+		printf(", ipg/ewma %d.%03d/%d.%03d ms",
+		       ipg/1000, ipg%1000, rtt/8000, (rtt/8)%1000);
+	}
+	putchar('\n');
+	exit(!nreceived || (deadline && nreceived < npackets));
+}
+
+
+void status(void)
+{
+	int loss = 0;
+	long tavg = 0;
+
+	status_snapshot = 0;
+
+	if (ntransmitted)
+		loss = (((long long)(ntransmitted - nreceived)) * 100) / ntransmitted;
+
+	fprintf(stderr, "\r%ld/%ld packets, %d%% loss", ntransmitted, nreceived, loss);
+
+	if (nreceived && timing) {
+		tavg = tsum / (nreceived + nrepeats);
+
+		fprintf(stderr, ", min/avg/ewma/max = %ld.%03ld/%lu.%03ld/%d.%03d/%ld.%03ld ms",
+		       tmin/1000, tmin%1000,
+		       tavg/1000, tavg%1000,
+		       rtt/8000, (rtt/8)%1000,
+		       tmax/1000, tmax%1000
+		       );
+	}
+	fprintf(stderr, "\n");
+}
+
+/* PING COMMON */
+
+#define	MAXIPLEN	60
+#define	MAXICMPLEN	76
+#define	NROUTES		9		/* number of record route slots */
+#define TOS_MAX		255		/* 8-bit TOS field */
+
+
+static int ts_type;
+static int nroute = 0;
+static __u32 route[10];
+
+
+
+struct sockaddr_in whereto;	/* who to ping */
+int optlen = 0;
+int settos = 0;			/* Set TOS, Precendence or other QOS options */
+int icmp_sock;			/* socket file descriptor */
+u_char outpack[0x10000];
+int maxpacket = sizeof(outpack);
+
+static int broadcast_pings = 0;
+
+static char *pr_addr(__u32);
+static void pr_options(unsigned char * cp, int hlen);
+static void pr_iph(struct iphdr *ip);
+static void usage(void) __attribute__((noreturn));
+static u_short in_cksum(const u_short *addr, int len, u_short salt);
+static void pr_icmph(__u8 type, __u8 code, __u32 info, struct icmphdr *icp);
+static int parsetos(char *str);
+
+static struct {
+	struct cmsghdr cm;
+	struct in_pktinfo ipi;
+} cmsg = { {sizeof(struct cmsghdr) + sizeof(struct in_pktinfo), SOL_IP, IP_PKTINFO},
+	   {0, }};
+int cmsg_len;
+
+struct sockaddr_in source;
+char *device;
+int pmtudisc = -1;
+
+int receive_error_msg()
+{
+	int res;
+	char cbuf[512];
+	struct iovec  iov;
+	struct msghdr msg;
+	struct cmsghdr *cmsg;
+	struct sock_extended_err *e;
+	struct icmphdr icmph;
+	struct sockaddr_in target;
+	int net_errors = 0;
+	int local_errors = 0;
+	int saved_errno = errno;
+
+	iov.iov_base = &icmph;
+	iov.iov_len = sizeof(icmph);
+	msg.msg_name = (void*)&target;
+	msg.msg_namelen = sizeof(target);
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_flags = 0;
+	msg.msg_control = cbuf;
+	msg.msg_controllen = sizeof(cbuf);
+
+	res = recvmsg(icmp_sock, &msg, MSG_ERRQUEUE|MSG_DONTWAIT);
+	if (res < 0)
+		goto out;
+
+	e = NULL;
+	for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+		if (cmsg->cmsg_level == SOL_IP) {
+			if (cmsg->cmsg_type == IP_RECVERR)
+				e = (struct sock_extended_err *)CMSG_DATA(cmsg);
+		}
+	}
+	if (e == NULL)
+		abort();
+
+	if (e->ee_origin == SO_EE_ORIGIN_LOCAL) {
+		local_errors++;
+		if (options & F_QUIET)
+			goto out;
+		if (options & F_FLOOD)
+			write(STDOUT_FILENO, "E", 1);
+		else if (e->ee_errno != EMSGSIZE)
+			fprintf(stderr, "ping: local error: %s\n", strerror(e->ee_errno));
+		else
+			fprintf(stderr, "ping: local error: Message too long, mtu=%u\n", e->ee_info);
+		nerrors++;
+	} else if (e->ee_origin == SO_EE_ORIGIN_ICMP) {
+		struct sockaddr_in *sin = (struct sockaddr_in*)(e+1);
+
+		if (res < sizeof(icmph) ||
+		    target.sin_addr.s_addr != whereto.sin_addr.s_addr ||
+		    icmph.type != ICMP_ECHO ||
+		    icmph.un.echo.id != ident) {
+			/* Not our error, not an error at all. Clear. */
+			saved_errno = 0;
+			goto out;
+		}
+
+		acknowledge(ntohs(icmph.un.echo.sequence));
+
+		if (!working_recverr) {
+			struct icmp_filter filt;
+			working_recverr = 1;
+			/* OK, it works. Add stronger filter. */
+			filt.data = ~((1<<ICMP_SOURCE_QUENCH)|
+				      (1<<ICMP_REDIRECT)|
+				      (1<<ICMP_ECHOREPLY));
+			if (setsockopt(icmp_sock, SOL_RAW, ICMP_FILTER, (char*)&filt, sizeof(filt)) == -1)
+				perror("\rWARNING: setsockopt(ICMP_FILTER)");
+		}
+
+		net_errors++;
+		nerrors++;
+		if (options & F_QUIET)
+			goto out;
+		if (options & F_FLOOD) {
+			write(STDOUT_FILENO, "\bE", 2);
+		} else {
+			printf("From %s icmp_seq=%u ", pr_addr(sin->sin_addr.s_addr), ntohs(icmph.un.echo.sequence));
+			pr_icmph(e->ee_type, e->ee_code, e->ee_info, NULL);
+			fflush(stdout);
+		}
+	}
+
+out:
+	errno = saved_errno;
+	return net_errors ? : -local_errors;
+}
+
+/*
+ * pinger --
+ * 	Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
+ * will be added on by the kernel.  The ID field is our UNIX process ID,
+ * and the sequence number is an ascending integer.  The first 8 bytes
+ * of the data portion are used to hold a UNIX "timeval" struct in VAX
+ * byte-order, to compute the round-trip time.
+ */
+int send_probe()
+{
+	struct icmphdr *icp;
+	int cc;
+	int i;
+
+	icp = (struct icmphdr *)outpack;
+	icp->type = ICMP_ECHO;
+	icp->code = 0;
+	icp->checksum = 0;
+	icp->un.echo.sequence = htons(ntransmitted+1);
+	icp->un.echo.id = ident;			/* ID */
+
+	CLR((ntransmitted+1) % mx_dup_ck);
+
+	if (timing) {
+		if (options&F_LATENCY) {
+			static volatile int fake_fucked_egcs = sizeof(struct timeval);
+			struct timeval tmp_tv;
+			gettimeofday(&tmp_tv, NULL);
+			/* egcs is crap or glibc is crap, but memcpy 
+			   does not copy anything, if len is constant! */
+			memcpy(icp+1, &tmp_tv, fake_fucked_egcs);
+		} else {
+			memset(icp+1, 0, sizeof(struct timeval));
+		}
+	}
+
+	cc = datalen + 8;			/* skips ICMP portion */
+
+	/* compute ICMP checksum here */
+	icp->checksum = in_cksum((u_short *)icp, cc, 0);
+
+	if (timing && !(options&F_LATENCY)) {
+		static volatile int fake_fucked_egcs = sizeof(struct timeval);
+	        struct timeval tmp_tv;
+		gettimeofday(&tmp_tv, NULL);
+		/* egcs is crap or glibc is crap, but memcpy 
+		   does not copy anything, if len is constant! */
+		memcpy(icp+1, &tmp_tv, fake_fucked_egcs);
+		icp->checksum = in_cksum((u_short *)(icp+1), fake_fucked_egcs, ~icp->checksum);
+	}
+
+        do {
+		static struct iovec iov = {outpack, 0};
+		static struct msghdr m = { &whereto, sizeof(whereto),
+						   &iov, 1, &cmsg, 0, 0 };
+		m.msg_controllen = cmsg_len;
+		iov.iov_len = cc;
+
+		i = sendmsg(icmp_sock, &m, confirm);
+		confirm = 0;
+	} while (0);
+
+	return (cc == i ? 0 : i);
+}
+
+/*
+ * parse_reply --
+ *	Print out the packet, if it came from us.  This logic is necessary
+ * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
+ * which arrive ('tis only fair).  This permits multiple copies of this
+ * program to be run without having intermingled output (or statistics!).
+ */
+int
+parse_reply(struct msghdr *msg, int cc, void *addr, struct timeval *tv)
+{
+	struct sockaddr_in *from = addr;
+	__u8 *buf = msg->msg_iov->iov_base;
+	struct icmphdr *icp;
+	struct iphdr *ip;
+	int hlen;
+	int csfailed;
+
+	/* Check the IP header */
+	ip = (struct iphdr *)buf;
+	hlen = ip->ihl*4;
+	if (cc < hlen + 8 || ip->ihl < 5) {
+		if (options & F_VERBOSE)
+			fprintf(stderr, "ping: packet too short (%d bytes) from %s\n", cc,
+				pr_addr(from->sin_addr.s_addr));
+		return 1;
+	}
+
+	/* Now the ICMP part */
+	cc -= hlen;
+	icp = (struct icmphdr *)(buf + hlen);
+	csfailed = in_cksum((u_short *)icp, cc, 0);
+
+	if (icp->type == ICMP_ECHOREPLY) {
+		if (icp->un.echo.id != ident)
+			return 1;			/* 'Twas not our ECHO */
+		if (gather_statistics((__u8*)(icp+1), cc,
+				      ntohs(icp->un.echo.sequence),
+				      ip->ttl, 0, tv, pr_addr(from->sin_addr.s_addr)))
+			return 0;
+	} else {
+		/* We fall here when a redirect or source quench arrived.
+		 * Also this branch processes icmp errors, when IP_RECVERR
+		 * is broken. */
+		   
+	        switch (icp->type) {
+		case ICMP_ECHO:
+			/* MUST NOT */
+			return 1;
+		case ICMP_SOURCE_QUENCH:
+		case ICMP_REDIRECT:
+		case ICMP_DEST_UNREACH:
+		case ICMP_TIME_EXCEEDED:
+		case ICMP_PARAMETERPROB:
+			{
+				struct iphdr * iph = (struct  iphdr *)(&icp[1]);
+				struct icmphdr *icp1 = (struct icmphdr*)((unsigned char *)iph + iph->ihl*4);
+				int error_pkt;
+				if (cc < 8+sizeof(struct iphdr)+8 ||
+				    cc < 8+iph->ihl*4+8)
+					return 1;
+				if (icp1->type != ICMP_ECHO ||
+				    iph->daddr != whereto.sin_addr.s_addr ||
+				    icp1->un.echo.id != ident)
+					return 1;
+				error_pkt = (icp->type != ICMP_REDIRECT &&
+					     icp->type != ICMP_SOURCE_QUENCH);
+				if (error_pkt) {
+					acknowledge(ntohs(icp1->un.echo.sequence));
+					if (working_recverr) {
+						return 0;
+					} else {
+						static int once;
+						/* Sigh, IP_RECVERR for raw socket
+						 * was broken until 2.4.9. So, we ignore
+						 * the first error and warn on the second.
+						 */
+						if (once++ == 1)
+							fprintf(stderr, "\rWARNING: kernel is not very fresh, upgrade is recommended.\n");
+						if (once == 1)
+							return 0;
+					}
+				}
+				nerrors+=error_pkt;
+				if (options&F_QUIET)
+					return !error_pkt;
+				if (options & F_FLOOD) {
+					if (error_pkt)
+						write(STDOUT_FILENO, "\bE", 2);
+					return !error_pkt;
+				}
+				printf("From %s: icmp_seq=%u ",
+				       pr_addr(from->sin_addr.s_addr),
+				       ntohs(icp1->un.echo.sequence));
+				if (csfailed)
+					printf("(BAD CHECKSUM)");
+				pr_icmph(icp->type, icp->code, ntohl(icp->un.gateway), icp);
+				return !error_pkt;
+			}
+	        default:
+			/* MUST NOT */
+			break;
+		}
+		if ((options & F_FLOOD) && !(options & (F_VERBOSE|F_QUIET))) {
+			if (!csfailed)
+				write(STDOUT_FILENO, "!E", 2);
+			else
+				write(STDOUT_FILENO, "!EC", 3);
+			return 0;
+		}
+		if (!(options & F_VERBOSE) || uid)
+			return 0;
+		printf("From %s: ", pr_addr(from->sin_addr.s_addr));
+		if (csfailed) {
+			printf("(BAD CHECKSUM)\n");
+			return 0;
+		}
+		pr_icmph(icp->type, icp->code, ntohl(icp->un.gateway), icp);
+		return 0;
+	}
+
+	if (!(options & F_FLOOD)) {
+		pr_options(buf + sizeof(struct iphdr), hlen);
+
+		if (options & F_AUDIBLE)
+			putchar('\a');
+		putchar('\n');
+		fflush(stdout);
+	}
+	return 0;
+}
+
+u_short
+in_cksum(const u_short *addr, register int len, u_short csum)
+{
+	register int nleft = len;
+	const u_short *w = addr;
+	register u_short answer;
+	register int sum = csum;
+
+	/*
+	 *  Our algorithm is simple, using a 32 bit accumulator (sum),
+	 *  we add sequential 16 bit words to it, and at the end, fold
+	 *  back all the carry bits from the top 16 bits into the lower
+	 *  16 bits.
+	 */
+	while (nleft > 1)  {
+		sum += *w++;
+		nleft -= 2;
+	}
+
+	/* mop up an odd byte, if necessary */
+	if (nleft == 1)
+		sum += htons(*(u_char *)w << 8);
+
+	/*
+	 * add back carry outs from top 16 bits to low 16 bits
+	 */
+	sum = (sum >> 16) + (sum & 0xffff);	/* add hi 16 to low 16 */
+	sum += (sum >> 16);			/* add carry */
+	answer = ~sum;				/* truncate to 16 bits */
+	return (answer);
+}
+
+/*
+ * pr_icmph --
+ *	Print a descriptive string about an ICMP header.
+ */
+void pr_icmph(__u8 type, __u8 code, __u32 info, struct icmphdr *icp)
+{
+	switch(type) {
+	case ICMP_ECHOREPLY:
+		printf("Echo Reply\n");
+		/* XXX ID + Seq + Data */
+		break;
+	case ICMP_DEST_UNREACH:
+		switch(code) {
+		case ICMP_NET_UNREACH:
+			printf("Destination Net Unreachable\n");
+			break;
+		case ICMP_HOST_UNREACH:
+			printf("Destination Host Unreachable\n");
+			break;
+		case ICMP_PROT_UNREACH:
+			printf("Destination Protocol Unreachable\n");
+			break;
+		case ICMP_PORT_UNREACH:
+			printf("Destination Port Unreachable\n");
+			break;
+		case ICMP_FRAG_NEEDED:
+			printf("Frag needed and DF set (mtu = %u)\n", info);
+			break;
+		case ICMP_SR_FAILED:
+			printf("Source Route Failed\n");
+			break;
+		case ICMP_PKT_FILTERED:
+			printf("Packet filtered\n");
+			break;
+		default:
+			printf("Dest Unreachable, Bad Code: %d\n", code);
+			break;
+		}
+		if (icp && (options & F_VERBOSE))
+			pr_iph((struct iphdr*)(icp + 1));
+		break;
+	case ICMP_SOURCE_QUENCH:
+		printf("Source Quench\n");
+		if (icp && (options & F_VERBOSE))
+			pr_iph((struct iphdr*)(icp + 1));
+		break;
+	case ICMP_REDIRECT:
+		switch(code) {
+		case ICMP_REDIR_NET:
+			printf("Redirect Network");
+			break;
+		case ICMP_REDIR_HOST:
+			printf("Redirect Host");
+			break;
+		case ICMP_REDIR_NETTOS:
+			printf("Redirect Type of Service and Network");
+			break;
+		case ICMP_REDIR_HOSTTOS:
+			printf("Redirect Type of Service and Host");
+			break;
+		default:
+			printf("Redirect, Bad Code: %d", code);
+			break;
+		}
+		if (icp)
+			printf("(New nexthop: %s)\n", pr_addr(icp->un.gateway));
+		if (icp && (options & F_VERBOSE))
+			pr_iph((struct iphdr*)(icp + 1));
+		break;
+	case ICMP_ECHO:
+		printf("Echo Request\n");
+		/* XXX ID + Seq + Data */
+		break;
+	case ICMP_TIME_EXCEEDED:
+		switch(code) {
+		case ICMP_EXC_TTL:
+			printf("Time to live exceeded\n");
+			break;
+		case ICMP_EXC_FRAGTIME:
+			printf("Frag reassembly time exceeded\n");
+			break;
+		default:
+			printf("Time exceeded, Bad Code: %d\n", code);
+			break;
+		}
+		if (icp && (options & F_VERBOSE))
+			pr_iph((struct iphdr*)(icp + 1));
+		break;
+	case ICMP_PARAMETERPROB:
+		printf("Parameter problem: pointer = %u\n", icp ? (ntohl(icp->un.gateway)>>24) : info);
+		if (icp && (options & F_VERBOSE))
+			pr_iph((struct iphdr*)(icp + 1));
+		break;
+	case ICMP_TIMESTAMP:
+		printf("Timestamp\n");
+		/* XXX ID + Seq + 3 timestamps */
+		break;
+	case ICMP_TIMESTAMPREPLY:
+		printf("Timestamp Reply\n");
+		/* XXX ID + Seq + 3 timestamps */
+		break;
+	case ICMP_INFO_REQUEST:
+		printf("Information Request\n");
+		/* XXX ID + Seq */
+		break;
+	case ICMP_INFO_REPLY:
+		printf("Information Reply\n");
+		/* XXX ID + Seq */
+		break;
+#ifdef ICMP_MASKREQ
+	case ICMP_MASKREQ:
+		printf("Address Mask Request\n");
+		break;
+#endif
+#ifdef ICMP_MASKREPLY
+	case ICMP_MASKREPLY:
+		printf("Address Mask Reply\n");
+		break;
+#endif
+	default:
+		printf("Bad ICMP type: %d\n", type);
+	}
+}
+
+void pr_options(unsigned char * cp, int hlen)
+{
+	int i, j;
+	int optlen, totlen;
+	unsigned char * optptr;
+	static int old_rrlen;
+	static char old_rr[MAX_IPOPTLEN];
+
+	totlen = hlen-sizeof(struct iphdr);
+	optptr = cp;
+
+	while (totlen > 0) {
+		if (*optptr == IPOPT_EOL)
+			break;
+		if (*optptr == IPOPT_NOP) {
+			totlen--;
+			optptr++;
+			printf("\nNOP");
+			continue;
+		}
+		cp = optptr;
+		optlen = optptr[1];
+		if (optlen < 2 || optlen > totlen)
+			break;
+
+		switch (*cp) {
+		case IPOPT_SSRR:
+		case IPOPT_LSRR:
+			printf("\n%cSRR: ", *cp==IPOPT_SSRR ? 'S' : 'L');
+			j = *++cp;
+			i = *++cp;
+			i -= 4;
+			cp++;
+			if (j > IPOPT_MINOFF) {
+				for (;;) {
+					__u32 address;
+					memcpy(&address, cp, 4);
+					cp += 4;
+					if (address == 0)
+						printf("\t0.0.0.0");
+					else
+						printf("\t%s", pr_addr(address));
+					j -= 4;
+					putchar('\n');
+					if (j <= IPOPT_MINOFF)
+						break;
+				}
+			}
+			break;
+		case IPOPT_RR:
+			j = *++cp;		/* get length */
+			i = *++cp;		/* and pointer */
+			if (i > j)
+				i = j;
+			i -= IPOPT_MINOFF;
+			if (i <= 0)
+				continue;
+			if (i == old_rrlen
+			    && !memcmp((char *)cp, old_rr, i)
+			    && !(options & F_FLOOD)) {
+				printf("\t(same route)");
+				i = ((i + 3) / 4) * 4;
+				cp += i;
+				break;
+			}
+			old_rrlen = i;
+			memcpy((char *)cp, old_rr, i);
+			printf("\nRR: ");
+			cp++;
+			for (;;) {
+				__u32 address;
+				memcpy(&address, cp, 4);
+				cp += 4;
+				if (address == 0)
+					printf("\t0.0.0.0");
+				else
+					printf("\t%s", pr_addr(address));
+				i -= 4;
+				putchar('\n');
+				if (i <= 0)
+					break;
+			}
+			break;
+		case IPOPT_TS:
+		{
+			int stdtime = 0, nonstdtime = 0;
+			__u8 flags;
+			j = *++cp;		/* get length */
+			i = *++cp;		/* and pointer */
+			if (i > j)
+				i = j;
+			i -= 5;
+			if (i <= 0)
+				continue;
+			flags = *++cp;
+			printf("\nTS: ");
+			cp++;
+			for (;;) {
+				long l;
+
+				if ((flags&0xF) != IPOPT_TS_TSONLY) {
+					__u32 address;
+					memcpy(&address, cp, 4);
+					cp += 4;
+					if (address == 0)
+						printf("\t0.0.0.0");
+					else
+						printf("\t%s", pr_addr(address));
+					i -= 4;
+					if (i <= 0)
+						break;
+				}
+				l = *cp++;
+				l = (l<<8) + *cp++;
+				l = (l<<8) + *cp++;
+				l = (l<<8) + *cp++;
+
+				if  (l & 0x80000000) {
+					if (nonstdtime==0)
+						printf("\t%ld absolute not-standard", l&0x7fffffff);
+					else
+						printf("\t%ld not-standard", (l&0x7fffffff) - nonstdtime);
+					nonstdtime = l&0x7fffffff;
+				} else {
+					if (stdtime==0)
+						printf("\t%ld absolute", l);
+					else
+						printf("\t%ld", l - stdtime);
+					stdtime = l;
+				}
+				i -= 4;
+				putchar('\n');
+				if (i <= 0)
+					break;
+			}
+			if (flags>>4)
+				printf("Unrecorded hops: %d\n", flags>>4);
+			break;
+		}
+		default:
+			printf("\nunknown option %x", *cp);
+			break;
+		}
+		totlen -= optlen;
+		optptr += optlen;
+	}
+}
+
+
+/*
+ * pr_iph --
+ *	Print an IP header with options.
+ */
+void pr_iph(struct iphdr *ip)
+{
+	int hlen;
+	u_char *cp;
+
+	hlen = ip->ihl << 2;
+	cp = (u_char *)ip + 20;		/* point to options */
+
+	printf("Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst Data\n");
+	printf(" %1x  %1x  %02x %04x %04x",
+	       ip->version, ip->ihl, ip->tos, ip->tot_len, ip->id);
+	printf("   %1x %04x", ((ip->frag_off) & 0xe000) >> 13,
+	       (ip->frag_off) & 0x1fff);
+	printf("  %02x  %02x %04x", ip->ttl, ip->protocol, ip->check);
+	printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->saddr));
+	printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->daddr));
+	printf("\n");
+	pr_options(cp, hlen);
+}
+
+/*
+ * pr_addr --
+ *	Return an ascii host address as a dotted quad and optionally with
+ * a hostname.
+ */
+char *
+pr_addr(__u32 addr)
+{
+	struct hostent *hp;
+	static char buf[4096];
+
+	if ((options & F_NUMERIC) ||
+	    !(hp = gethostbyaddr((char *)&addr, 4, AF_INET)))
+		sprintf(buf, "%s", inet_ntoa(*(struct in_addr *)&addr));
+	else
+		snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
+			 inet_ntoa(*(struct in_addr *)&addr));
+	return(buf);
+}
+
+
+/* Set Type of Service (TOS) and other Quality of Service relating bits */
+int parsetos(char *str)
+{
+        const char *cp;
+        int tos;
+        char *ep;
+
+        /* handle both hex and decimal values */
+        if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) {
+		cp = str + 2;
+		tos = (int)strtol(cp, &ep, 16);
+        } else
+                tos = (int)strtol(str, &ep, 10);
+
+        /* doesn't look like decimal or hex, eh? */
+        if (*ep != '\0') {
+        	fprintf(stderr, "ping: \"%s\" bad value for TOS\n", str);
+        	exit(2);
+        }
+
+        if (tos > TOS_MAX) {
+        	fprintf(stderr, "ping: the decimal value of TOS bits must be 0-254 (or zero)\n");
+        	exit(2);
+        }
+	return(tos);
+}
+
+#include <linux/filter.h>
+
+void install_filter(void)
+{
+	static int once;
+	static struct sock_filter insns[] = {
+		BPF_STMT(BPF_LDX|BPF_B|BPF_MSH, 0), /* Skip IP header. F..g BSD... Look into ping6. */
+		BPF_STMT(BPF_LD|BPF_H|BPF_IND, 4), /* Load icmp echo ident */
+		BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 0xAAAA, 0, 1), /* Ours? */
+		BPF_STMT(BPF_RET|BPF_K, ~0U), /* Yes, it passes. */
+		BPF_STMT(BPF_LD|BPF_B|BPF_IND, 0), /* Load icmp type */
+		BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, ICMP_ECHOREPLY, 1, 0), /* Echo? */
+		BPF_STMT(BPF_RET|BPF_K, 0xFFFFFFF), /* No. It passes. */
+		BPF_STMT(BPF_RET|BPF_K, 0) /* Echo with wrong ident. Reject. */
+	};
+	static struct sock_fprog filter = {
+		sizeof insns / sizeof(insns[0]),
+		insns
+	};
+
+	if (once)
+		return;
+	once = 1;
+
+	/* Patch bpflet for current identifier. */
+	insns[2] = (struct sock_filter)BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __constant_htons(ident), 0, 1);
+
+	if (setsockopt(icmp_sock, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)))
+		perror("WARNING: failed to install socket filter\n");
+}
+
+
+void usage(void)
+{
+	fprintf(stderr,
+"Usage: ping [-LRUbdfnqrvVaA] [-c count] [-i interval] [-w deadline]\n"
+"            [-p pattern] [-s packetsize] [-t ttl] [-I interface or address]\n"
+"            [-M mtu discovery hint] [-S sndbuf]\n"
+"            [ -T timestamp option ] [ -Q tos ] [hop1 ...] destination\n");
+	exit(2);
+}
+
+int main(int argc, char *argv[])
+{
+	struct hostent *hp;
+	int ch, hold, packlen;
+	int socket_errno;
+	u_char *packet;
+	char *target, hnamebuf[MAXHOSTNAMELEN];
+	char rspace[3 + 4 * NROUTES + 1];	/* record route space */
+
+	icmp_sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
+	socket_errno = errno;
+
+	/* if we were setuid root, undo that */
+	if (setuid(getuid())) return -1;
+
+	source.sin_family = AF_INET;
+
+	preload = 1;
+	while ((ch = getopt(argc, argv, COMMON_OPTSTR "bRT:")) != EOF) {
+		switch(ch) {
+		case 'b':
+		        broadcast_pings = 1;
+			break;
+		case 'Q':
+			settos = parsetos(optarg);
+			if (settos &&
+			    (setsockopt(icmp_sock, IPPROTO_IP, IP_TOS,
+					(char *)&settos, sizeof(int)) < 0)) {
+				perror("ping: error setting QOS sockopts");
+				exit(2);
+			}
+			break;
+		case 'R':
+			if (options & F_TIMESTAMP) {
+				fprintf(stderr, "Only one of -T or -R may be used\n");
+				exit(2);
+			}
+			options |= F_RROUTE;
+			break;
+		case 'T':
+			if (options & F_RROUTE) {
+				fprintf(stderr, "Only one of -T or -R may be used\n");
+				exit(2);
+			}
+			options |= F_TIMESTAMP;
+			if (strcmp(optarg, "tsonly") == 0)
+				ts_type = IPOPT_TS_TSONLY;
+			else if (strcmp(optarg, "tsandaddr") == 0)
+				ts_type = IPOPT_TS_TSANDADDR;
+			else if (strcmp(optarg, "tsprespec") == 0)
+				ts_type = IPOPT_TS_PRESPEC;
+			else {
+				fprintf(stderr, "Invalid timestamp type\n");
+				exit(2);
+			}
+			break;
+		case 'I':
+		{
+			char dummy;
+			int i1, i2, i3, i4;
+
+			if (sscanf(optarg, "%u.%u.%u.%u%c",
+				   &i1, &i2, &i3, &i4, &dummy) == 4) {
+				__u8 *ptr;
+				ptr = (__u8*)&source.sin_addr;
+				ptr[0] = i1;
+				ptr[1] = i2;
+				ptr[2] = i3;
+				ptr[3] = i4;
+				options |= F_STRICTSOURCE;
+			} else {
+				device = optarg;
+			}
+			break;
+		}
+		case 'M':
+			if (strcmp(optarg, "do") == 0)
+				pmtudisc = IP_PMTUDISC_DO;
+			else if (strcmp(optarg, "dont") == 0)
+				pmtudisc = IP_PMTUDISC_DONT;
+			else if (strcmp(optarg, "want") == 0)
+				pmtudisc = IP_PMTUDISC_WANT;
+			else {
+				fprintf(stderr, "ping: wrong value for -M: do, dont, want are valid ones.\n");
+				exit(2);
+			}
+			break;
+		case 'V':
+			printf("ping utility, iputils-ss\n");
+			exit(0);
+		COMMON_OPTIONS
+			common_options(ch);
+			break;
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc == 0) 
+		usage();
+	if (argc > 1) {
+		if (options & F_RROUTE)
+			usage();
+		else if (options & F_TIMESTAMP) {
+			if (ts_type != IPOPT_TS_PRESPEC)
+				usage();
+			if (argc > 5)
+				usage();
+		} else {
+			if (argc > 10)
+				usage();
+			options |= F_SOURCEROUTE;
+		}
+	}
+	while (argc > 0) {
+		target = *argv;
+
+		bzero((char *)&whereto, sizeof(whereto));
+		whereto.sin_family = AF_INET;
+		if (inet_aton(target, &whereto.sin_addr) == 1) {
+			hostname = target;
+			if (argc == 1)
+				options |= F_NUMERIC;
+		} else {
+			hp = gethostbyname(target);
+			hp = gethostbyname(target);
+			hp = gethostbyname(target);
+			if (!hp) {
+				fprintf(stderr, "ping: unknown host %s\n", target);
+				exit(2);
+			}
+			memcpy(&whereto.sin_addr, hp->h_addr, 4);
+			strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
+			hnamebuf[sizeof(hnamebuf) - 1] = 0;
+			hostname = hnamebuf;
+		}
+		if (argc > 1)
+			route[nroute++] = whereto.sin_addr.s_addr;
+		argc--;
+		argv++;
+	}
+
+	if (source.sin_addr.s_addr == 0) {
+		int alen;
+		struct sockaddr_in dst = whereto;
+		int probe_fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+		if (probe_fd < 0) {
+			perror("socket");
+			exit(2);
+		}
+		if (device) {
+			struct ifreq ifr;
+			memset(&ifr, 0, sizeof(ifr));
+			strncpy(ifr.ifr_name, device, IFNAMSIZ-1);
+			if (setsockopt(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device, strlen(device)+1) == -1) {
+				if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
+					struct ip_mreqn imr;
+					if (ioctl(probe_fd, SIOCGIFINDEX, &ifr) < 0) {
+						fprintf(stderr, "ping: unknown iface %s\n", device);
+						exit(2);
+					}
+					memset(&imr, 0, sizeof(imr));
+					imr.imr_ifindex = ifr.ifr_ifindex;
+					if (setsockopt(probe_fd, SOL_IP, IP_MULTICAST_IF, &imr, sizeof(imr)) == -1) {
+						perror("ping: IP_MULTICAST_IF");
+						exit(2);
+					}
+				}
+			}
+		}
+
+		if (settos &&
+		    setsockopt(probe_fd, IPPROTO_IP, IP_TOS, (char *)&settos, sizeof(int)) < 0)
+			perror("Warning: error setting QOS sockopts");
+
+		dst.sin_port = htons(1025);
+		if (nroute)
+			dst.sin_addr.s_addr = route[0];
+		if (connect(probe_fd, (struct sockaddr*)&dst, sizeof(dst)) == -1) {
+			if (errno == EACCES) {
+				if (broadcast_pings == 0) {
+					fprintf(stderr, "Do you want to ping broadcast? Then -b\n");
+					exit(2);
+				}
+				fprintf(stderr, "WARNING: pinging broadcast address\n");
+				if (setsockopt(probe_fd, SOL_SOCKET, SO_BROADCAST,
+					       &broadcast_pings, sizeof(broadcast_pings)) < 0) {
+					perror ("can't set broadcasting");
+					exit(2);
+				}
+				if (connect(probe_fd, (struct sockaddr*)&dst, sizeof(dst)) == -1) {
+					perror("connect");
+					exit(2);
+				}
+			} else {
+				perror("connect");
+				exit(2);
+			}
+		}
+		alen = sizeof(source);
+		if (getsockname(probe_fd, (struct sockaddr*)&source, &alen) == -1) {
+			perror("getsockname");
+			exit(2);
+		}
+		source.sin_port = 0;
+		close(probe_fd);
+	} while (0);
+
+	if (whereto.sin_addr.s_addr == 0)
+		whereto.sin_addr.s_addr = source.sin_addr.s_addr;
+
+	if (icmp_sock < 0) {
+		errno = socket_errno;
+		perror("ping: icmp open socket");
+		exit(2);
+	}
+
+	if (device) {
+		struct ifreq ifr;
+
+		memset(&ifr, 0, sizeof(ifr));
+		strncpy(ifr.ifr_name, device, IFNAMSIZ-1);
+		if (ioctl(icmp_sock, SIOCGIFINDEX, &ifr) < 0) {
+			fprintf(stderr, "ping: unknown iface %s\n", device);
+			exit(2);
+		}
+		cmsg.ipi.ipi_ifindex = ifr.ifr_ifindex;
+		cmsg_len = sizeof(cmsg);
+	}
+
+	if (broadcast_pings || IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) {
+		if (uid) {
+			if (interval < 1000) {
+				fprintf(stderr, "ping: broadcast ping with too short interval.\n");
+				exit(2);
+			}
+			if (pmtudisc >= 0 && pmtudisc != IP_PMTUDISC_DO) {
+				fprintf(stderr, "ping: broadcast ping does not fragment.\n");
+				exit(2);
+			}
+		}
+		if (pmtudisc < 0)
+			pmtudisc = IP_PMTUDISC_DO;
+	}
+
+	if (pmtudisc >= 0) {
+		if (setsockopt(icmp_sock, SOL_IP, IP_MTU_DISCOVER, &pmtudisc, sizeof(pmtudisc)) == -1) {
+			perror("ping: IP_MTU_DISCOVER");
+			exit(2);
+		}
+	}
+
+	if ((options&F_STRICTSOURCE) &&
+	    bind(icmp_sock, (struct sockaddr*)&source, sizeof(source)) == -1) {
+		perror("bind");
+		exit(2);
+	}
+
+	if (1) {
+		struct icmp_filter filt;
+		filt.data = ~((1<<ICMP_SOURCE_QUENCH)|
+			      (1<<ICMP_DEST_UNREACH)|
+			      (1<<ICMP_TIME_EXCEEDED)|
+			      (1<<ICMP_PARAMETERPROB)|
+			      (1<<ICMP_REDIRECT)|
+			      (1<<ICMP_ECHOREPLY));
+		if (setsockopt(icmp_sock, SOL_RAW, ICMP_FILTER, (char*)&filt, sizeof(filt)) == -1)
+			perror("WARNING: setsockopt(ICMP_FILTER)");
+	}
+
+	hold = 1;
+	if (setsockopt(icmp_sock, SOL_IP, IP_RECVERR, (char *)&hold, sizeof(hold)))
+		fprintf(stderr, "WARNING: your kernel is veeery old. No problems.\n");
+
+	/* record route option */
+	if (options & F_RROUTE) {
+	        bzero(rspace, sizeof(rspace));
+		rspace[0] = IPOPT_NOP;
+		rspace[1+IPOPT_OPTVAL] = IPOPT_RR;
+		rspace[1+IPOPT_OLEN] = sizeof(rspace)-1;
+		rspace[1+IPOPT_OFFSET] = IPOPT_MINOFF;
+		optlen = 40;
+		if (setsockopt(icmp_sock, IPPROTO_IP, IP_OPTIONS, rspace, sizeof(rspace)) < 0) {
+			perror("ping: record route");
+			exit(2);
+		}
+	}
+	if (options & F_TIMESTAMP) {
+	        bzero(rspace, sizeof(rspace));
+		rspace[0] = IPOPT_TIMESTAMP;
+		rspace[1] = (ts_type==IPOPT_TS_TSONLY ? 40 : 36);
+		rspace[2] = 5;
+		rspace[3] = ts_type;
+		if (ts_type == IPOPT_TS_PRESPEC) {
+			int i;
+			rspace[1] = 4+nroute*8;
+			for (i=0; i<nroute; i++)
+				*(__u32*)&rspace[4+i*8] = route[i];
+		}
+		if (setsockopt(icmp_sock, IPPROTO_IP, IP_OPTIONS, rspace, rspace[1]) < 0) {
+			rspace[3] = 2;
+			if (setsockopt(icmp_sock, IPPROTO_IP, IP_OPTIONS, rspace, rspace[1]) < 0) {
+				perror("ping: ts option");
+				exit(2);
+			}
+		}
+		optlen = 40;
+	}
+	if (options & F_SOURCEROUTE) {
+	        int i;
+	        bzero(rspace, sizeof(rspace));
+		rspace[0] = IPOPT_NOOP;
+		rspace[1+IPOPT_OPTVAL] = (options & F_SO_DONTROUTE) ? IPOPT_SSRR
+			: IPOPT_LSRR;
+		rspace[1+IPOPT_OLEN] = 3 + nroute*4;
+		rspace[1+IPOPT_OFFSET] = IPOPT_MINOFF;
+		for (i=0; i<nroute; i++)
+			*(__u32*)&rspace[4+i*4] = route[i];
+		
+		if (setsockopt(icmp_sock, IPPROTO_IP, IP_OPTIONS, rspace, 4 + nroute*4) < 0) {
+			perror("ping: record route");
+			exit(2);
+		}
+		optlen = 40;
+	}
+
+	/* Estimate memory eaten by single packet. It is rough estimate.
+	 * Actually, for small datalen's it depends on kernel side a lot. */
+	hold = datalen + 8;
+	hold += ((hold+511)/512)*(optlen + 20 + 16 + 64 + 160);
+	sock_setbufs(icmp_sock, hold);
+
+	if (broadcast_pings) {
+		if (setsockopt(icmp_sock, SOL_SOCKET, SO_BROADCAST,
+			       &broadcast_pings, sizeof(broadcast_pings)) < 0) {
+			perror ("ping: can't set broadcasting");
+			exit(2);
+		}
+        }
+
+	if (options & F_NOLOOP) {
+		int loop = 0;
+		if (setsockopt(icmp_sock, IPPROTO_IP, IP_MULTICAST_LOOP,
+							&loop, 1) == -1) {
+			perror ("ping: can't disable multicast loopback");
+			exit(2);
+		}
+	}
+	if (options & F_TTL) {
+		int ittl = ttl;
+		if (setsockopt(icmp_sock, IPPROTO_IP, IP_MULTICAST_TTL,
+							&ttl, 1) == -1) {
+			perror ("ping: can't set multicast time-to-live");
+			exit(2);
+		}
+		if (setsockopt(icmp_sock, IPPROTO_IP, IP_TTL,
+							&ittl, sizeof(ittl)) == -1) {
+			perror ("ping: can't set unicast time-to-live");
+			exit(2);
+		}
+	}
+
+	if (datalen > 0xFFFF - 8 - optlen - 20) {
+		if (uid || datalen > sizeof(outpack)-8) {
+			fprintf(stderr, "Error: packet size %d is too large. Maximum is %d\n", datalen, 0xFFFF-8-20-optlen);
+			exit(2);
+		}
+		/* Allow small oversize to root yet. It will cause EMSGSIZE. */
+		fprintf(stderr, "WARNING: packet size %d is too large. Maximum is %d\n", datalen, 0xFFFF-8-20-optlen);
+	}
+
+	if (datalen >= sizeof(struct timeval))	/* can we time transfer */
+		timing = 1;
+	packlen = datalen + MAXIPLEN + MAXICMPLEN;
+	if (!(packet = (u_char *)malloc((u_int)packlen))) {
+		fprintf(stderr, "ping: out of memory.\n");
+		exit(2);
+	}
+
+	printf("PING %s (%s) ", hostname, inet_ntoa(whereto.sin_addr));
+	if (device || (options&F_STRICTSOURCE))
+		printf("from %s %s: ", inet_ntoa(source.sin_addr), device ?: "");
+	printf("%d(%d) bytes of data.\n", datalen, datalen+8+optlen+20);
+
+	setup(icmp_sock);
+
+	main_loop(icmp_sock, packet, packlen);
+	return 0;
+}
+
+void *dlopen(const char *filename, int flag) { return 0; }
+char *dlerror(void) { return 0; }
+void *dlsym(void *handle, const char *symbol) { return 0; }
+int dlclose(void *handle) { return 0; }
diff --git a/ping_common.h b/ping_common.h
new file mode 100644
index 0000000..a7c494d
--- /dev/null
+++ b/ping_common.h
@@ -0,0 +1,199 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <linux/sockios.h>
+#include <sys/file.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <sys/uio.h>
+#include <sys/poll.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <netdb.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <linux/errqueue.h>
+
+#define	DEFDATALEN	(64 - 8)	/* default data length */
+
+#define	MAXWAIT		10		/* max seconds to wait for response */
+#define MININTERVAL	10		/* Minimal interpacket gap */
+#define MINUSERINTERVAL	200		/* Minimal allowed interval for non-root */
+
+#define SCHINT(a)	(((a) <= MININTERVAL) ? MININTERVAL : (a))
+
+#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))
+
+/* various options */
+extern int options;
+#define	F_FLOOD		0x001
+#define	F_INTERVAL	0x002
+#define	F_NUMERIC	0x004
+#define	F_PINGFILLED	0x008
+#define	F_QUIET		0x010
+#define	F_RROUTE	0x020
+#define	F_SO_DEBUG	0x040
+#define	F_SO_DONTROUTE	0x080
+#define	F_VERBOSE	0x100
+#define	F_TIMESTAMP	0x200
+#define	F_FLOWINFO	0x200
+#define	F_SOURCEROUTE	0x400
+#define	F_TCLASS	0x400
+#define	F_FLOOD_POLL	0x800
+#define	F_LATENCY	0x1000
+#define	F_AUDIBLE	0x2000
+#define	F_ADAPTIVE	0x4000
+#define	F_STRICTSOURCE	0x8000
+#define F_NOLOOP	0x10000
+#define F_TTL		0x20000
+
+/*
+ * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
+ * number of received sequence numbers we can keep track of.
+ */
+#define	MAX_DUP_CHK	0x10000
+extern int mx_dup_ck;
+extern char rcvd_tbl[MAX_DUP_CHK / 8];
+
+
+extern u_char outpack[];
+extern int maxpacket;
+
+extern int datalen;
+extern char *hostname;
+extern int uid;
+extern int ident;			/* process id to identify our packets */
+
+extern int sndbuf;
+extern int ttl;
+
+extern long npackets;			/* max packets to transmit */
+extern long nreceived;			/* # of packets we got back */
+extern long nrepeats;			/* number of duplicates */
+extern long ntransmitted;		/* sequence # for outbound packets = #sent */
+extern long nchecksum;			/* replies with bad checksum */
+extern long nerrors;			/* icmp errors */
+extern int interval;			/* interval between packets (msec) */
+extern int preload;
+extern int deadline;			/* time to die */
+extern int lingertime;
+extern struct timeval start_time, cur_time;
+extern volatile int exiting;
+extern volatile int status_snapshot;
+extern int confirm;
+extern int confirm_flag;
+extern int working_recverr;
+
+#ifndef MSG_CONFIRM
+#define MSG_CONFIRM 0
+#endif
+
+
+/* timing */
+extern int timing;			/* flag to do timing */
+extern long tmin;			/* minimum round trip time */
+extern long tmax;			/* maximum round trip time */
+extern long long tsum;			/* sum of all times, for doing average */
+extern long long tsum2;
+extern int rtt;
+extern __u16 acked;
+extern int pipesize;
+
+#define COMMON_OPTIONS \
+case 'a': case 'U': case 'c': case 'd': \
+case 'f': case 'i': case 'w': case 'l': \
+case 'S': case 'n': case 'p': case 'q': \
+case 'r': case 's': case 'v': case 'L': \
+case 't': case 'A': case 'W': case 'B':
+
+#define COMMON_OPTSTR "h?VQ:I:M:aUc:dfi:w:l:S:np:qrs:vLt:AW:B"
+
+
+/*
+ * tvsub --
+ *	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 inline void set_signal(int signo, void (*handler)(int))
+{
+	struct sigaction sa;
+
+	memset(&sa, 0, sizeof(sa));
+
+	sa.sa_handler = (void (*)(int))handler;
+#ifdef SA_INTERRUPT
+	sa.sa_flags = SA_INTERRUPT;
+#endif
+	sigaction(signo, &sa, NULL);
+}
+
+extern int __schedule_exit(int next);
+
+static inline int schedule_exit(int next)
+{
+	if (npackets && ntransmitted >= npackets && !deadline)
+		next = __schedule_exit(next);
+	return next;
+}
+
+static inline int in_flight(void)
+{
+	__u16 diff = (__u16)ntransmitted - acked;
+	return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors;
+}
+
+static inline void acknowledge(__u16 seq)
+{ 
+	__u16 diff = (__u16)ntransmitted - seq;
+	if (diff <= 0x7FFF) {
+		if ((int)diff+1 > pipesize)
+			pipesize = (int)diff+1;
+		if ((__s16)(seq - acked) > 0 ||
+		    (__u16)ntransmitted - acked > 0x7FFF)
+			acked = seq;
+	}
+}
+
+static inline void advance_ntransmitted(void)
+{
+	ntransmitted++;
+	/* Invalidate acked, if 16 bit seq overflows. */
+	if ((__u16)ntransmitted - acked > 0x7FFF)
+		acked = (__u16)ntransmitted + 1;
+}
+
+
+extern int send_probe(void);
+extern int receive_error_msg(void);
+extern int parse_reply(struct msghdr *msg, int len, void *addr, struct timeval *);
+extern void install_filter(void);
+
+extern int pinger(void);
+extern void sock_setbufs(int icmp_sock, int alloc);
+extern void setup(int icmp_sock);
+extern void main_loop(int icmp_sock, __u8 *buf, int buflen) __attribute__((noreturn));
+extern void finish(void) __attribute__((noreturn));
+extern void status(void);
+extern void common_options(int ch);
+extern int gather_statistics(__u8 *ptr, int cc, __u16 seq, int hops,
+			     int csfailed, struct timeval *tv, char *from);