openadk/package/busybox/patches/004-ping.patch

diff -Nur busybox-1.22.1.orig/networking/ping.c busybox-1.22.1/networking/ping.c
--- busybox-1.22.1.orig/networking/ping.c	2014-01-20 03:38:10.000000000 +0100
+++ busybox-1.22.1/networking/ping.c	2014-05-24 14:31:09.000000000 +0200
@@ -152,6 +152,7 @@
 	pingsock = 0,
 };
 
+static int using_dgram;
 static void
 #if ENABLE_PING6
 create_icmp_socket(len_and_sockaddr *lsa)
@@ -184,6 +185,7 @@
 		if (sock < 0)
 #endif
 		bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+		using_dgram = 1;
 	}
 
 	xmove_fd(sock, pingsock);
@@ -234,10 +236,12 @@
 				bb_perror_msg("recvfrom");
 			continue;
 		}
-		if (c >= 76) {			/* ip + icmp */
-			struct iphdr *iphdr = (struct iphdr *) G.packet;
+		if (c >= 76 || using_dgram && (c == 64)) {			/* ip + icmp */
+			if(!using_dgram) {
+				struct iphdr *iphdr = (struct iphdr *) G.packet;
 
-			pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2));	/* skip ip hdr */
+				pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2));	/* skip ip hdr */
+			} else pkt = (struct icmp *) G.packet;
 			if (pkt->icmp_type == ICMP_ECHOREPLY)
 				break;
 		}
@@ -628,19 +632,21 @@
 }
 static void unpack4(char *buf, int sz, struct sockaddr_in *from)
 {
-	struct icmp *icmppkt;
 	struct iphdr *iphdr;
+	struct icmp *icmppkt;
 	int hlen;
 
 	/* discard if too short */
 	if (sz < (datalen + ICMP_MINLEN))
 		return;
+	if(!using_dgram) {
+		/* check IP header */
+		iphdr = (struct iphdr *) buf;
+		hlen = iphdr->ihl << 2;
+		sz -= hlen;
+		icmppkt = (struct icmp *) (buf + hlen);
+	} else icmppkt = (struct icmp *) buf;
 
-	/* check IP header */
-	iphdr = (struct iphdr *) buf;
-	hlen = iphdr->ihl << 2;
-	sz -= hlen;
-	icmppkt = (struct icmp *) (buf + hlen);
 	if (icmppkt->icmp_id != myid)
 		return;				/* not our ping */
 
@@ -652,7 +658,7 @@
 			tp = (uint32_t *) icmppkt->icmp_data;
 		unpack_tail(sz, tp,
 			inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
-			recv_seq, iphdr->ttl);
+			recv_seq, using_dgram ? 42 : iphdr->ttl);
 	} else if (icmppkt->icmp_type != ICMP_ECHO) {
 		bb_error_msg("warning: got ICMP %d (%s)",
 				icmppkt->icmp_type,
@@ -696,11 +702,31 @@
 	int sockopt;
 
 	pingaddr.sin = lsa->u.sin;
-	if (source_lsa) {
+	if (source_lsa && !using_dgram) {
 		if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
 				&source_lsa->u.sa, source_lsa->len))
 			bb_error_msg_and_die("can't set multicast source interface");
 		xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
+	} else if(using_dgram) {
+		struct sockaddr_in sa;
+		socklen_t sl;
+
+		sa.sin_family = AF_INET;
+		sa.sin_port = 0;
+		sa.sin_addr.s_addr = source_lsa ?
+			source_lsa->u.sin.sin_addr.s_addr : 0;
+		sl = sizeof(sa);
+
+		if (bind(pingsock, (struct sockaddr *) &sa, sl) == -1) {
+			perror("bind");
+			exit(2);
+		}
+
+		if (getsockname(pingsock, (struct sockaddr *) &sa, &sl) == -1) {
+			perror("getsockname");
+			exit(2);
+		}
+		myid = sa.sin_port;
 	}
 
 	/* enable broadcast pings */
@@ -717,6 +743,15 @@
 		setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
 	}
 
+	if(using_dgram) {
+		int hold = 65536;
+		if (setsockopt(pingsock, SOL_IP, IP_RECVTTL, (char *)&hold, sizeof(hold)))
+			perror("WARNING: setsockopt(IP_RECVTTL)");
+		if (setsockopt(pingsock, SOL_IP, IP_RETOPTS, (char *)&hold, sizeof(hold)))
+			perror("WARNING: setsockopt(IP_RETOPTS)");
+
+	}
+
 	signal(SIGINT, print_stats_and_exit);
 
 	/* start the ping's going ... */
@@ -751,10 +786,33 @@
 	char control_buf[CMSG_SPACE(36)];
 
 	pingaddr.sin6 = lsa->u.sin6;
-	if (source_lsa)
+	if (source_lsa && !using_dgram)
 		xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
+	else if(using_dgram) {
+                struct sockaddr_in6 sa = {0};
+                socklen_t sl;
+
+                sa.sin6_family = AF_INET6;
+                sa.sin6_port = 0;
+		if(source_lsa) {
+			memcpy(&sa.sin6_addr, &source_lsa->u.sin6.sin6_addr, sizeof(struct in6_addr));
+		}
+                sl = sizeof(sa);
+
+                if (bind(pingsock, (struct sockaddr *) &sa, sl) == -1) {
+                        perror("bind");
+                        exit(2);
+                }
+
+                if (getsockname(pingsock, (struct sockaddr *) &sa, &sl) == -1) {
+                        perror("getsockname");
+                        exit(2);
+                }
+                myid = sa.sin6_port;
+	}
 
 #ifdef ICMP6_FILTER
+	if(!using_dgram)
 	{
 		struct icmp6_filter filt;
 		if (!(option_mask32 & OPT_VERBOSE)) {
@@ -880,7 +938,7 @@
 			str_I = NULL; /* don't try to bind to device later */
 		}
 	}
-	myid = (uint16_t) getpid();
+	if(!using_dgram) myid = (uint16_t) getpid();
 	hostname = argv[optind];
 #if ENABLE_PING6
 	{
diff -Nur busybox-1.22.1.orig/networking/ping.c.orig busybox-1.22.1/networking/ping.c.orig
--- busybox-1.22.1.orig/networking/ping.c.orig	1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.22.1/networking/ping.c.orig	2014-01-20 03:38:10.000000000 +0100
@@ -0,0 +1,966 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ping implementation for busybox
+ *
+ * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
+ *
+ * Adapted from the ping in netkit-base 0.10:
+ * 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.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+/* from ping6.c:
+ * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
+ *
+ * This version of ping is adapted from the ping in netkit-base 0.10,
+ * which is:
+ *
+ * Original copyright notice is retained at the end of this file.
+ *
+ * This version is an adaptation of ping.c from busybox.
+ * The code was modified by Bart Visscher <magick@linux-fan.com>
+ */
+
+#include <net/if.h>
+#include <netinet/ip_icmp.h>
+#include "libbb.h"
+
+#ifdef __BIONIC__
+/* should be in netinet/ip_icmp.h */
+# define ICMP_DEST_UNREACH    3  /* Destination Unreachable  */
+# define ICMP_SOURCE_QUENCH   4  /* Source Quench    */
+# define ICMP_REDIRECT        5  /* Redirect (change route)  */
+# define ICMP_ECHO            8  /* Echo Request      */
+# define ICMP_TIME_EXCEEDED  11  /* Time Exceeded    */
+# define ICMP_PARAMETERPROB  12  /* Parameter Problem    */
+# define ICMP_TIMESTAMP      13  /* Timestamp Request    */
+# define ICMP_TIMESTAMPREPLY 14  /* Timestamp Reply    */
+# define ICMP_INFO_REQUEST   15  /* Information Request    */
+# define ICMP_INFO_REPLY     16  /* Information Reply    */
+# define ICMP_ADDRESS        17  /* Address Mask Request    */
+# define ICMP_ADDRESSREPLY   18  /* Address Mask Reply    */
+#endif
+
+//config:config PING
+//config:	bool "ping"
+//config:	default y
+//config:	select PLATFORM_LINUX
+//config:	help
+//config:	  ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
+//config:	  elicit an ICMP ECHO_RESPONSE from a host or gateway.
+//config:
+//config:config PING6
+//config:	bool "ping6"
+//config:	default y
+//config:	depends on FEATURE_IPV6 && PING
+//config:	help
+//config:	  This will give you a ping that can talk IPv6.
+//config:
+//config:config FEATURE_FANCY_PING
+//config:	bool "Enable fancy ping output"
+//config:	default y
+//config:	depends on PING
+//config:	help
+//config:	  Make the output from the ping applet include statistics, and at the
+//config:	  same time provide full support for ICMP packets.
+
+/* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
+//applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
+//applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
+
+//kbuild:lib-$(CONFIG_PING)  += ping.o
+//kbuild:lib-$(CONFIG_PING6) += ping.o
+
+//usage:#if !ENABLE_FEATURE_FANCY_PING
+//usage:# define ping_trivial_usage
+//usage:       "HOST"
+//usage:# define ping_full_usage "\n\n"
+//usage:       "Send ICMP ECHO_REQUEST packets to network hosts"
+//usage:# define ping6_trivial_usage
+//usage:       "HOST"
+//usage:# define ping6_full_usage "\n\n"
+//usage:       "Send ICMP ECHO_REQUEST packets to network hosts"
+//usage:#else
+//usage:# define ping_trivial_usage
+//usage:       "[OPTIONS] HOST"
+//usage:# define ping_full_usage "\n\n"
+//usage:       "Send ICMP ECHO_REQUEST packets to network hosts\n"
+//usage:	IF_PING6(
+//usage:     "\n	-4,-6		Force IP or IPv6 name resolution"
+//usage:	)
+//usage:     "\n	-c CNT		Send only CNT pings"
+//usage:     "\n	-s SIZE		Send SIZE data bytes in packets (default:56)"
+//usage:     "\n	-t TTL		Set TTL"
+//usage:     "\n	-I IFACE/IP	Use interface or IP address as source"
+//usage:     "\n	-W SEC		Seconds to wait for the first response (default:10)"
+//usage:     "\n			(after all -c CNT packets are sent)"
+//usage:     "\n	-w SEC		Seconds until ping exits (default:infinite)"
+//usage:     "\n			(can exit earlier with -c CNT)"
+//usage:     "\n	-q		Quiet, only displays output at start"
+//usage:     "\n			and when finished"
+//usage:
+//usage:# define ping6_trivial_usage
+//usage:       "[OPTIONS] HOST"
+//usage:# define ping6_full_usage "\n\n"
+//usage:       "Send ICMP ECHO_REQUEST packets to network hosts\n"
+//usage:     "\n	-c CNT		Send only CNT pings"
+//usage:     "\n	-s SIZE		Send SIZE data bytes in packets (default:56)"
+//usage:     "\n	-I IFACE/IP	Use interface or IP address as source"
+//usage:     "\n	-q		Quiet, only displays output at start"
+//usage:     "\n			and when finished"
+//usage:
+//usage:#endif
+//usage:
+//usage:#define ping_example_usage
+//usage:       "$ ping localhost\n"
+//usage:       "PING slag (127.0.0.1): 56 data bytes\n"
+//usage:       "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
+//usage:       "\n"
+//usage:       "--- debian ping statistics ---\n"
+//usage:       "1 packets transmitted, 1 packets received, 0% packet loss\n"
+//usage:       "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
+//usage:#define ping6_example_usage
+//usage:       "$ ping6 ip6-localhost\n"
+//usage:       "PING ip6-localhost (::1): 56 data bytes\n"
+//usage:       "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
+//usage:       "\n"
+//usage:       "--- ip6-localhost ping statistics ---\n"
+//usage:       "1 packets transmitted, 1 packets received, 0% packet loss\n"
+//usage:       "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
+
+#if ENABLE_PING6
+# include <netinet/icmp6.h>
+/* I see RENUMBERED constants in bits/in.h - !!?
+ * What a fuck is going on with libc? Is it a glibc joke? */
+# ifdef IPV6_2292HOPLIMIT
+#  undef IPV6_HOPLIMIT
+#  define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
+# endif
+#endif
+
+enum {
+	DEFDATALEN = 56,
+	MAXIPLEN = 60,
+	MAXICMPLEN = 76,
+	MAX_DUP_CHK = (8 * 128),
+	MAXWAIT = 10,
+	PINGINTERVAL = 1, /* 1 second */
+	pingsock = 0,
+};
+
+static void
+#if ENABLE_PING6
+create_icmp_socket(len_and_sockaddr *lsa)
+#else
+create_icmp_socket(void)
+#define create_icmp_socket(lsa) create_icmp_socket()
+#endif
+{
+	int sock;
+#if ENABLE_PING6
+	if (lsa->u.sa.sa_family == AF_INET6)
+		sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
+	else
+#endif
+		sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
+	if (sock < 0) {
+		if (errno != EPERM)
+			bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
+#if defined(__linux__) || defined(__APPLE__)
+		/* We don't have root privileges.  Try SOCK_DGRAM instead.
+		 * Linux needs net.ipv4.ping_group_range for this to work.
+		 * MacOSX allows ICMP_ECHO, ICMP_TSTAMP or ICMP_MASKREQ
+		 */
+#if ENABLE_PING6
+		if (lsa->u.sa.sa_family == AF_INET6)
+			sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_ICMPV6);
+		else
+#endif
+			sock = socket(AF_INET, SOCK_DGRAM, 1); /* 1 == ICMP */
+		if (sock < 0)
+#endif
+		bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+	}
+
+	xmove_fd(sock, pingsock);
+}
+
+#if !ENABLE_FEATURE_FANCY_PING
+
+/* Simple version */
+
+struct globals {
+	char *hostname;
+	char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define INIT_G() do { } while (0)
+
+static void noresp(int ign UNUSED_PARAM)
+{
+	printf("No response from %s\n", G.hostname);
+	exit(EXIT_FAILURE);
+}
+
+static void ping4(len_and_sockaddr *lsa)
+{
+	struct icmp *pkt;
+	int c;
+
+	pkt = (struct icmp *) G.packet;
+	/*memset(pkt, 0, sizeof(G.packet)); already is */
+	pkt->icmp_type = ICMP_ECHO;
+	pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
+
+	xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
+
+	/* listen for replies */
+	while (1) {
+#if 0
+		struct sockaddr_in from;
+		socklen_t fromlen = sizeof(from);
+
+		c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
+				(struct sockaddr *) &from, &fromlen);
+#else
+		c = recv(pingsock, G.packet, sizeof(G.packet), 0);
+#endif
+		if (c < 0) {
+			if (errno != EINTR)
+				bb_perror_msg("recvfrom");
+			continue;
+		}
+		if (c >= 76) {			/* ip + icmp */
+			struct iphdr *iphdr = (struct iphdr *) G.packet;
+
+			pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2));	/* skip ip hdr */
+			if (pkt->icmp_type == ICMP_ECHOREPLY)
+				break;
+		}
+	}
+	if (ENABLE_FEATURE_CLEAN_UP)
+		close(pingsock);
+}
+
+#if ENABLE_PING6
+static void ping6(len_and_sockaddr *lsa)
+{
+	struct icmp6_hdr *pkt;
+	int c;
+	int sockopt;
+
+	pkt = (struct icmp6_hdr *) G.packet;
+	/*memset(pkt, 0, sizeof(G.packet)); already is */
+	pkt->icmp6_type = ICMP6_ECHO_REQUEST;
+
+	sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
+	setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
+
+	xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
+
+	/* listen for replies */
+	while (1) {
+#if 0
+		struct sockaddr_in6 from;
+		socklen_t fromlen = sizeof(from);
+
+		c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
+				(struct sockaddr *) &from, &fromlen);
+#else
+		c = recv(pingsock, G.packet, sizeof(G.packet), 0);
+#endif
+		if (c < 0) {
+			if (errno != EINTR)
+				bb_perror_msg("recvfrom");
+			continue;
+		}
+		if (c >= ICMP_MINLEN) {	/* icmp6_hdr */
+			if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
+				break;
+		}
+	}
+	if (ENABLE_FEATURE_CLEAN_UP)
+		close(pingsock);
+}
+#endif
+
+#if !ENABLE_PING6
+# define common_ping_main(af, argv) common_ping_main(argv)
+#endif
+static int common_ping_main(sa_family_t af, char **argv)
+{
+	len_and_sockaddr *lsa;
+
+	INIT_G();
+
+#if ENABLE_PING6
+	while ((++argv)[0] && argv[0][0] == '-') {
+		if (argv[0][1] == '4') {
+			af = AF_INET;
+			continue;
+		}
+		if (argv[0][1] == '6') {
+			af = AF_INET6;
+			continue;
+		}
+		bb_show_usage();
+	}
+#else
+	argv++;
+#endif
+
+	G.hostname = *argv;
+	if (!G.hostname)
+		bb_show_usage();
+
+#if ENABLE_PING6
+	lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
+#else
+	lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
+#endif
+	/* Set timer _after_ DNS resolution */
+	signal(SIGALRM, noresp);
+	alarm(5); /* give the host 5000ms to respond */
+
+	create_icmp_socket(lsa);
+#if ENABLE_PING6
+	if (lsa->u.sa.sa_family == AF_INET6)
+		ping6(lsa);
+	else
+#endif
+		ping4(lsa);
+	printf("%s is alive!\n", G.hostname);
+	return EXIT_SUCCESS;
+}
+
+
+#else /* FEATURE_FANCY_PING */
+
+
+/* Full(er) version */
+
+#define OPT_STRING ("qvc:s:t:w:W:I:n4" IF_PING6("6"))
+enum {
+	OPT_QUIET = 1 << 0,
+	OPT_VERBOSE = 1 << 1,
+	OPT_c = 1 << 2,
+	OPT_s = 1 << 3,
+	OPT_t = 1 << 4,
+	OPT_w = 1 << 5,
+	OPT_W = 1 << 6,
+	OPT_I = 1 << 7,
+	/*OPT_n = 1 << 8, - ignored */
+	OPT_IPV4 = 1 << 9,
+	OPT_IPV6 = (1 << 10) * ENABLE_PING6,
+};
+
+
+struct globals {
+	int if_index;
+	char *str_I;
+	len_and_sockaddr *source_lsa;
+	unsigned datalen;
+	unsigned pingcount; /* must be int-sized */
+	unsigned opt_ttl;
+	unsigned long ntransmitted, nreceived, nrepeats;
+	uint16_t myid;
+	unsigned tmin, tmax; /* in us */
+	unsigned long long tsum; /* in us, sum of all times */
+	unsigned deadline;
+	unsigned timeout;
+	unsigned total_secs;
+	unsigned sizeof_rcv_packet;
+	char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
+	void *snd_packet; /* [datalen + ipv4/ipv6_const] */
+	const char *hostname;
+	const char *dotted;
+	union {
+		struct sockaddr sa;
+		struct sockaddr_in sin;
+#if ENABLE_PING6
+		struct sockaddr_in6 sin6;
+#endif
+	} pingaddr;
+	unsigned char rcvd_tbl[MAX_DUP_CHK / 8];
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define if_index     (G.if_index    )
+#define source_lsa   (G.source_lsa  )
+#define str_I        (G.str_I       )
+#define datalen      (G.datalen     )
+#define pingcount    (G.pingcount   )
+#define opt_ttl      (G.opt_ttl     )
+#define myid         (G.myid        )
+#define tmin         (G.tmin        )
+#define tmax         (G.tmax        )
+#define tsum         (G.tsum        )
+#define deadline     (G.deadline    )
+#define timeout      (G.timeout     )
+#define total_secs   (G.total_secs  )
+#define hostname     (G.hostname    )
+#define dotted       (G.dotted      )
+#define pingaddr     (G.pingaddr    )
+#define rcvd_tbl     (G.rcvd_tbl    )
+void BUG_ping_globals_too_big(void);
+#define INIT_G() do { \
+	if (sizeof(G) > COMMON_BUFSIZE) \
+		BUG_ping_globals_too_big(); \
+	datalen = DEFDATALEN; \
+	timeout = MAXWAIT; \
+	tmin = UINT_MAX; \
+} while (0)
+
+
+#define BYTE(bit)	rcvd_tbl[(bit)>>3]
+#define MASK(bit)	(1 << ((bit) & 7))
+#define SET(bit)	(BYTE(bit) |= MASK(bit))
+#define CLR(bit)	(BYTE(bit) &= (~MASK(bit)))
+#define TST(bit)	(BYTE(bit) & MASK(bit))
+
+static void print_stats_and_exit(int junk) NORETURN;
+static void print_stats_and_exit(int junk UNUSED_PARAM)
+{
+	unsigned long ul;
+	unsigned long nrecv;
+
+	signal(SIGINT, SIG_IGN);
+
+	nrecv = G.nreceived;
+	printf("\n--- %s ping statistics ---\n"
+		"%lu packets transmitted, "
+		"%lu packets received, ",
+		hostname, G.ntransmitted, nrecv
+	);
+	if (G.nrepeats)
+		printf("%lu duplicates, ", G.nrepeats);
+	ul = G.ntransmitted;
+	if (ul != 0)
+		ul = (ul - nrecv) * 100 / ul;
+	printf("%lu%% packet loss\n", ul);
+	if (tmin != UINT_MAX) {
+		unsigned tavg = tsum / (nrecv + G.nrepeats);
+		printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
+			tmin / 1000, tmin % 1000,
+			tavg / 1000, tavg % 1000,
+			tmax / 1000, tmax % 1000);
+	}
+	/* if condition is true, exit with 1 -- 'failure' */
+	exit(nrecv == 0 || (deadline && nrecv < pingcount));
+}
+
+static void sendping_tail(void (*sp)(int), int size_pkt)
+{
+	int sz;
+
+	CLR((uint16_t)G.ntransmitted % MAX_DUP_CHK);
+	G.ntransmitted++;
+
+	size_pkt += datalen;
+
+	/* sizeof(pingaddr) can be larger than real sa size, but I think
+	 * it doesn't matter */
+	sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
+	if (sz != size_pkt)
+		bb_error_msg_and_die(bb_msg_write_error);
+
+	if (pingcount == 0 || deadline || G.ntransmitted < pingcount) {
+		/* Didn't send all pings yet - schedule next in 1s */
+		signal(SIGALRM, sp);
+		if (deadline) {
+			total_secs += PINGINTERVAL;
+			if (total_secs >= deadline)
+				signal(SIGALRM, print_stats_and_exit);
+		}
+		alarm(PINGINTERVAL);
+	} else { /* -c NN, and all NN are sent (and no deadline) */
+		/* Wait for the last ping to come back.
+		 * -W timeout: wait for a response in seconds.
+		 * Affects only timeout in absense of any responses,
+		 * otherwise ping waits for two RTTs. */
+		unsigned expire = timeout;
+
+		if (G.nreceived) {
+			/* approx. 2*tmax, in seconds (2 RTT) */
+			expire = tmax / (512*1024);
+			if (expire == 0)
+				expire = 1;
+		}
+		signal(SIGALRM, print_stats_and_exit);
+		alarm(expire);
+	}
+}
+
+static void sendping4(int junk UNUSED_PARAM)
+{
+	struct icmp *pkt = G.snd_packet;
+
+	//memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
+	pkt->icmp_type = ICMP_ECHO;
+	/*pkt->icmp_code = 0;*/
+	pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
+	pkt->icmp_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
+	pkt->icmp_id = myid;
+
+	/* If datalen < 4, we store timestamp _past_ the packet,
+	 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
+	 */
+	/*if (datalen >= 4)*/
+		/* No hton: we'll read it back on the same machine */
+		*(uint32_t*)&pkt->icmp_dun = monotonic_us();
+
+	pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN);
+
+	sendping_tail(sendping4, ICMP_MINLEN);
+}
+#if ENABLE_PING6
+static void sendping6(int junk UNUSED_PARAM)
+{
+	struct icmp6_hdr *pkt = G.snd_packet;
+
+	//memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
+	pkt->icmp6_type = ICMP6_ECHO_REQUEST;
+	/*pkt->icmp6_code = 0;*/
+	/*pkt->icmp6_cksum = 0;*/
+	pkt->icmp6_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
+	pkt->icmp6_id = myid;
+
+	/*if (datalen >= 4)*/
+		*(bb__aliased_uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
+
+	//TODO? pkt->icmp_cksum = inet_cksum(...);
+
+	sendping_tail(sendping6, sizeof(struct icmp6_hdr));
+}
+#endif
+
+static const 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";
+	}
+}
+#if ENABLE_PING6
+/* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
+ * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
+#ifndef MLD_LISTENER_QUERY
+# define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
+#endif
+#ifndef MLD_LISTENER_REPORT
+# define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
+#endif
+#ifndef MLD_LISTENER_REDUCTION
+# define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
+#endif
+static const char *icmp6_type_name(int id)
+{
+	switch (id) {
+	case ICMP6_DST_UNREACH:      return "Destination Unreachable";
+	case ICMP6_PACKET_TOO_BIG:   return "Packet too big";
+	case ICMP6_TIME_EXCEEDED:    return "Time Exceeded";
+	case ICMP6_PARAM_PROB:       return "Parameter Problem";
+	case ICMP6_ECHO_REPLY:       return "Echo Reply";
+	case ICMP6_ECHO_REQUEST:     return "Echo Request";
+	case MLD_LISTENER_QUERY:     return "Listener Query";
+	case MLD_LISTENER_REPORT:    return "Listener Report";
+	case MLD_LISTENER_REDUCTION: return "Listener Reduction";
+	default:                     return "unknown ICMP type";
+	}
+}
+#endif
+
+static void unpack_tail(int sz, uint32_t *tp,
+		const char *from_str,
+		uint16_t recv_seq, int ttl)
+{
+	unsigned char *b, m;
+	const char *dupmsg = " (DUP!)";
+	unsigned triptime = triptime; /* for gcc */
+
+	if (tp) {
+		/* (int32_t) cast is for hypothetical 64-bit unsigned */
+		/* (doesn't hurt 32-bit real-world anyway) */
+		triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
+		tsum += triptime;
+		if (triptime < tmin)
+			tmin = triptime;
+		if (triptime > tmax)
+			tmax = triptime;
+	}
+
+	b = &BYTE(recv_seq % MAX_DUP_CHK);
+	m = MASK(recv_seq % MAX_DUP_CHK);
+	/*if TST(recv_seq % MAX_DUP_CHK):*/
+	if (*b & m) {
+		++G.nrepeats;
+	} else {
+		/*SET(recv_seq % MAX_DUP_CHK):*/
+		*b |= m;
+		++G.nreceived;
+		dupmsg += 7;
+	}
+
+	if (option_mask32 & OPT_QUIET)
+		return;
+
+	printf("%d bytes from %s: seq=%u ttl=%d", sz,
+		from_str, recv_seq, ttl);
+	if (tp)
+		printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
+	puts(dupmsg);
+	fflush_all();
+}
+static void unpack4(char *buf, int sz, struct sockaddr_in *from)
+{
+	struct icmp *icmppkt;
+	struct iphdr *iphdr;
+	int hlen;
+
+	/* discard if too short */
+	if (sz < (datalen + ICMP_MINLEN))
+		return;
+
+	/* check IP header */
+	iphdr = (struct iphdr *) buf;
+	hlen = iphdr->ihl << 2;
+	sz -= hlen;
+	icmppkt = (struct icmp *) (buf + hlen);
+	if (icmppkt->icmp_id != myid)
+		return;				/* not our ping */
+
+	if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
+		uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
+		uint32_t *tp = NULL;
+
+		if (sz >= ICMP_MINLEN + sizeof(uint32_t))
+			tp = (uint32_t *) icmppkt->icmp_data;
+		unpack_tail(sz, tp,
+			inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
+			recv_seq, iphdr->ttl);
+	} else if (icmppkt->icmp_type != ICMP_ECHO) {
+		bb_error_msg("warning: got ICMP %d (%s)",
+				icmppkt->icmp_type,
+				icmp_type_name(icmppkt->icmp_type));
+	}
+}
+#if ENABLE_PING6
+static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
+{
+	struct icmp6_hdr *icmppkt;
+	char buf[INET6_ADDRSTRLEN];
+
+	/* discard if too short */
+	if (sz < (datalen + sizeof(struct icmp6_hdr)))
+		return;
+
+	icmppkt = (struct icmp6_hdr *) packet;
+	if (icmppkt->icmp6_id != myid)
+		return;				/* not our ping */
+
+	if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
+		uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
+		uint32_t *tp = NULL;
+
+		if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
+			tp = (uint32_t *) &icmppkt->icmp6_data8[4];
+		unpack_tail(sz, tp,
+			inet_ntop(AF_INET6, &from->sin6_addr,
+					buf, sizeof(buf)),
+			recv_seq, hoplimit);
+	} else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
+		bb_error_msg("warning: got ICMP %d (%s)",
+				icmppkt->icmp6_type,
+				icmp6_type_name(icmppkt->icmp6_type));
+	}
+}
+#endif
+
+static void ping4(len_and_sockaddr *lsa)
+{
+	int sockopt;
+
+	pingaddr.sin = lsa->u.sin;
+	if (source_lsa) {
+		if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
+				&source_lsa->u.sa, source_lsa->len))
+			bb_error_msg_and_die("can't set multicast source interface");
+		xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
+	}
+
+	/* enable broadcast pings */
+	setsockopt_broadcast(pingsock);
+
+	/* set recv buf (needed if we can get lots of responses: flood ping,
+	 * broadcast ping etc) */
+	sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
+	setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
+
+	if (opt_ttl != 0) {
+		setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
+		/* above doesnt affect packets sent to bcast IP, so... */
+		setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
+	}
+
+	signal(SIGINT, print_stats_and_exit);
+
+	/* start the ping's going ... */
+	sendping4(0);
+
+	/* listen for replies */
+	while (1) {
+		struct sockaddr_in from;
+		socklen_t fromlen = (socklen_t) sizeof(from);
+		int c;
+
+		c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
+				(struct sockaddr *) &from, &fromlen);
+		if (c < 0) {
+			if (errno != EINTR)
+				bb_perror_msg("recvfrom");
+			continue;
+		}
+		unpack4(G.rcv_packet, c, &from);
+		if (pingcount && G.nreceived >= pingcount)
+			break;
+	}
+}
+#if ENABLE_PING6
+extern int BUG_bad_offsetof_icmp6_cksum(void);
+static void ping6(len_and_sockaddr *lsa)
+{
+	int sockopt;
+	struct msghdr msg;
+	struct sockaddr_in6 from;
+	struct iovec iov;
+	char control_buf[CMSG_SPACE(36)];
+
+	pingaddr.sin6 = lsa->u.sin6;
+	if (source_lsa)
+		xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
+
+#ifdef ICMP6_FILTER
+	{
+		struct icmp6_filter filt;
+		if (!(option_mask32 & OPT_VERBOSE)) {
+			ICMP6_FILTER_SETBLOCKALL(&filt);
+			ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
+		} else {
+			ICMP6_FILTER_SETPASSALL(&filt);
+		}
+		if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
+					sizeof(filt)) < 0)
+			bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
+	}
+#endif /*ICMP6_FILTER*/
+
+	/* enable broadcast pings */
+	setsockopt_broadcast(pingsock);
+
+	/* set recv buf (needed if we can get lots of responses: flood ping,
+	 * broadcast ping etc) */
+	sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
+	setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
+
+	sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
+	if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
+		BUG_bad_offsetof_icmp6_cksum();
+	setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
+
+	/* request ttl info to be returned in ancillary data */
+	setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
+
+	if (if_index)
+		pingaddr.sin6.sin6_scope_id = if_index;
+
+	signal(SIGINT, print_stats_and_exit);
+
+	/* start the ping's going ... */
+	sendping6(0);
+
+	/* listen for replies */
+	msg.msg_name = &from;
+	msg.msg_namelen = sizeof(from);
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_control = control_buf;
+	iov.iov_base = G.rcv_packet;
+	iov.iov_len = G.sizeof_rcv_packet;
+	while (1) {
+		int c;
+		struct cmsghdr *mp;
+		int hoplimit = -1;
+		msg.msg_controllen = sizeof(control_buf);
+
+		c = recvmsg(pingsock, &msg, 0);
+		if (c < 0) {
+			if (errno != EINTR)
+				bb_perror_msg("recvfrom");
+			continue;
+		}
+		for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
+			if (mp->cmsg_level == SOL_IPV6
+			 && mp->cmsg_type == IPV6_HOPLIMIT
+			 /* don't check len - we trust the kernel: */
+			 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
+			) {
+				/*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
+				move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
+			}
+		}
+		unpack6(G.rcv_packet, c, &from, hoplimit);
+		if (pingcount && G.nreceived >= pingcount)
+			break;
+	}
+}
+#endif
+
+static void ping(len_and_sockaddr *lsa)
+{
+	printf("PING %s (%s)", hostname, dotted);
+	if (source_lsa) {
+		printf(" from %s",
+			xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
+	}
+	printf(": %d data bytes\n", datalen);
+
+	create_icmp_socket(lsa);
+	/* untested whether "-I addr" really works for IPv6: */
+	if (str_I)
+		setsockopt_bindtodevice(pingsock, str_I);
+
+	G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
+	G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
+#if ENABLE_PING6
+	if (lsa->u.sa.sa_family == AF_INET6) {
+		/* +4 reserves a place for timestamp, which may end up sitting
+		 * _after_ packet. Saves one if() - see sendping4/6() */
+		G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
+		ping6(lsa);
+	} else
+#endif
+	{
+		G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
+		ping4(lsa);
+	}
+}
+
+static int common_ping_main(int opt, char **argv)
+{
+	len_and_sockaddr *lsa;
+	char *str_s;
+
+	INIT_G();
+
+	/* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
+	opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
+	opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
+	if (opt & OPT_s)
+		datalen = xatou16(str_s); // -s
+	if (opt & OPT_I) { // -I
+		if_index = if_nametoindex(str_I);
+		if (!if_index) {
+			/* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
+			source_lsa = xdotted2sockaddr(str_I, 0);
+			str_I = NULL; /* don't try to bind to device later */
+		}
+	}
+	myid = (uint16_t) getpid();
+	hostname = argv[optind];
+#if ENABLE_PING6
+	{
+		sa_family_t af = AF_UNSPEC;
+		if (opt & OPT_IPV4)
+			af = AF_INET;
+		if (opt & OPT_IPV6)
+			af = AF_INET6;
+		lsa = xhost_and_af2sockaddr(hostname, 0, af);
+	}
+#else
+	lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
+#endif
+
+	if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
+		/* leaking it here... */
+		source_lsa = NULL;
+
+	dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
+	ping(lsa);
+	print_stats_and_exit(EXIT_SUCCESS);
+	/*return EXIT_SUCCESS;*/
+}
+#endif /* FEATURE_FANCY_PING */
+
+
+int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ping_main(int argc UNUSED_PARAM, char **argv)
+{
+#if !ENABLE_FEATURE_FANCY_PING
+	return common_ping_main(AF_UNSPEC, argv);
+#else
+	return common_ping_main(0, argv);
+#endif
+}
+
+#if ENABLE_PING6
+int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ping6_main(int argc UNUSED_PARAM, char **argv)
+{
+# if !ENABLE_FEATURE_FANCY_PING
+	return common_ping_main(AF_INET6, argv);
+# else
+	return common_ping_main(OPT_IPV6, argv);
+# endif
+}
+#endif
+
+/* from ping6.c:
+ * 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.
+ */