/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.56 2004/03/15 08:28:48 andersen Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
* Adapted from the ping in netkit-base 0.10:
* Copyright (c) 1989 The Regents of the University of California.
- * Derived from software contributed to Berkeley by Mike Muuss.
+ * All rights reserved.
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * 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 <sys/param.h>
-#include <sys/socket.h>
-#include <sys/file.h>
-#include <sys/time.h>
-#include <sys/times.h>
-#include <sys/signal.h>
-
-#include <netinet/in.h>
-#include <netinet/ip.h>
+#include <net/if.h>
#include <netinet/ip_icmp.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include "busybox.h"
-
-
-static const int DEFDATALEN = 56;
-static const int MAXIPLEN = 60;
-static const int MAXICMPLEN = 76;
-static const int MAXPACKET = 65468;
-#define MAX_DUP_CHK (8 * 128)
-static const int MAXWAIT = 10;
-static const int PINGINTERVAL = 1; /* second */
-
-#define O_QUIET (1 << 0)
-
-#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
-#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
-#define SET(bit) (A(bit) |= B(bit))
-#define CLR(bit) (A(bit) &= (~B(bit)))
-#define TST(bit) (A(bit) & B(bit))
-
-static void ping(const char *host);
-
-/* common routines */
-static int in_cksum(unsigned short *buf, int sz)
-{
- int nleft = sz;
- int sum = 0;
- unsigned short *w = buf;
- unsigned short ans = 0;
-
- while (nleft > 1) {
- sum += *w++;
- nleft -= 2;
- }
+#include "libbb.h"
+#include "common_bufsiz.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
+//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 || PING6
+//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 display output at start"
+//usage: "\n and when finished"
+//usage: "\n -p Pattern to use for payload"
+//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 display output at start"
+//usage: "\n and when finished"
+//usage: "\n -p Pattern to use for payload"
+//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
- if (nleft == 1) {
- *(unsigned char *) (&ans) = *(unsigned char *) w;
- sum += ans;
+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_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+ bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
}
- sum = (sum >> 16) + (sum & 0xFFFF);
- sum += (sum >> 16);
- ans = ~sum;
- return (ans);
+ xmove_fd(sock, pingsock);
}
-/* simple version */
-#ifndef CONFIG_FEATURE_FANCY_PING
-static char *hostname = NULL;
-static void noresp(int ign)
+#if !ENABLE_FEATURE_FANCY_PING
+
+/* Simple version */
+
+struct globals {
+ char *hostname;
+ char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+ uint16_t myid;
+} FIX_ALIASING;
+#define G (*(struct globals*)bb_common_bufsiz1)
+#define INIT_G() do { setup_common_bufsiz(); } while (0)
+
+static void noresp(int ign UNUSED_PARAM)
{
- printf("No response from %s\n", hostname);
+ printf("No response from %s\n", G.hostname);
exit(EXIT_FAILURE);
}
-static void ping(const char *host)
+static void ping4(len_and_sockaddr *lsa)
{
- struct hostent *h;
- struct sockaddr_in pingaddr;
struct icmp *pkt;
- int pingsock, c;
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
-
- pingsock = create_icmp_socket();
-
- memset(&pingaddr, 0, sizeof(struct sockaddr_in));
-
- pingaddr.sin_family = AF_INET;
- h = xgethostbyname(host);
- memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
- hostname = h->h_name;
+ int c;
- pkt = (struct icmp *) packet;
- memset(pkt, 0, sizeof(packet));
+ pkt = (struct icmp *) G.packet;
+ /*memset(pkt, 0, sizeof(G.packet)); already is */
pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+ pkt->icmp_id = G.myid;
+ pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
- c = sendto(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+ xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
- if (c < 0 || c != sizeof(packet))
- bb_perror_msg_and_die("sendto");
-
- signal(SIGALRM, noresp);
- alarm(5); /* give the host 5000ms to respond */
/* listen for replies */
while (1) {
+#if 0
struct sockaddr_in from;
socklen_t fromlen = sizeof(from);
- if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &from, &fromlen)) < 0) {
- if (errno == EINTR)
- continue;
- bb_perror_msg("recvfrom");
+ 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 *) packet;
+ struct iphdr *iphdr = (struct iphdr *) G.packet;
- pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */
+ pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
+ if (pkt->icmp_id != G.myid)
+ continue; /* not our ping */
if (pkt->icmp_type == ICMP_ECHOREPLY)
break;
}
}
- printf("%s is alive!\n", hostname);
- return;
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(pingsock);
}
-int ping_main(int argc, char **argv)
+#if ENABLE_PING6
+static void ping6(len_and_sockaddr *lsa)
{
- argc--;
- argv++;
- if (argc < 1)
- bb_show_usage();
- ping(*argv);
- return EXIT_SUCCESS;
+ 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;
+ pkt->icmp6_id = G.myid;
+
+ sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
+ setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, 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_id != G.myid)
+ continue; /* not our ping */
+ if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
+ break;
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(pingsock);
}
+#endif
-#else /* ! CONFIG_FEATURE_FANCY_PING */
-/* full(er) version */
-static struct sockaddr_in pingaddr;
-static int pingsock = -1;
-static int datalen; /* intentionally uninitialized to work around gcc bug */
+#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;
-static long ntransmitted, nreceived, nrepeats, pingcount;
-static int myid, options;
-static unsigned long tmin = ULONG_MAX, tmax, tsum;
-static char rcvd_tbl[MAX_DUP_CHK / 8];
+ INIT_G();
-#ifndef CONFIG_FEATURE_FANCY_PING6
-static
+#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
- struct hostent *hostent;
+ /* Set timer _after_ DNS resolution */
+ signal(SIGALRM, noresp);
+ alarm(5); /* give the host 5000ms to respond */
-static void sendping(int);
-static void pingstats(int);
-static void unpack(char *, int, struct sockaddr_in *);
+ create_icmp_socket(lsa);
+ G.myid = (uint16_t) getpid();
+#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;
+}
-/**************************************************************************/
-static void pingstats(int junk)
+#else /* FEATURE_FANCY_PING */
+
+
+/* Full(er) version */
+
+#define OPT_STRING ("qvc:+s:t:+w:+W:+I:np:4" 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_p = 1 << 9,
+ OPT_IPV4 = 1 << 10,
+ OPT_IPV6 = (1 << 11) * 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;
+ uint8_t pattern;
+ 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 )
+#define INIT_G() do { \
+ setup_common_bufsiz(); \
+ BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
+ 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)
{
- int status;
+ unsigned long ul;
+ unsigned long nrecv;
signal(SIGINT, SIG_IGN);
- printf("\n--- %s ping statistics ---\n", hostent->h_name);
- printf("%ld packets transmitted, ", ntransmitted);
- printf("%ld packets received, ", nreceived);
- if (nrepeats)
- printf("%ld duplicates, ", nrepeats);
- if (ntransmitted)
- printf("%ld%% packet loss\n",
- (ntransmitted - nreceived) * 100 / ntransmitted);
- if (nreceived)
- printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
- tmin / 10, tmin % 10,
- (tsum / (nreceived + nrepeats)) / 10,
- (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
- if (nreceived != 0)
- status = EXIT_SUCCESS;
- else
- status = EXIT_FAILURE;
- exit(status);
+ 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(int junk)
+static void sendping_tail(void (*sp)(int), int size_pkt)
{
- struct icmp *pkt;
- int i;
- char packet[datalen + sizeof(struct icmp)];
+ 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);
+ }
+}
- pkt = (struct icmp *) packet;
+static void sendping4(int junk UNUSED_PARAM)
+{
+ struct icmp *pkt = G.snd_packet;
+ memset(pkt, G.pattern, datalen + ICMP_MINLEN + 4);
pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_code = 0;
- pkt->icmp_cksum = 0;
- pkt->icmp_seq = htons(ntransmitted++);
+ /*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;
- CLR(ntohs(pkt->icmp_seq) % MAX_DUP_CHK);
- gettimeofday((struct timeval *) &pkt->icmp_dun, NULL);
- pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+ /* 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();
- i = sendto(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+ pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN);
- if (i < 0)
- bb_perror_msg_and_die("sendto");
- else if ((size_t)i != sizeof(packet))
- bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
- (int)sizeof(packet));
+ sendping_tail(sendping4, ICMP_MINLEN);
+}
+#if ENABLE_PING6
+static void sendping6(int junk UNUSED_PARAM)
+{
+ struct icmp6_hdr *pkt = G.snd_packet;
- signal(SIGALRM, sendping);
- if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
- alarm(PINGINTERVAL);
- } else { /* done, wait for the last ping to come back */
- /* todo, don't necessarily need to wait so long... */
- signal(SIGALRM, pingstats);
- alarm(MAXWAIT);
- }
+ memset(pkt, G.pattern, 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 char *icmp_type_name (int id)
+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";
+ 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;
-static void unpack(char *buf, int sz, struct sockaddr_in *from)
+ 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;
- struct timeval tv, *tp;
- int hlen, dupflag;
- unsigned long triptime;
-
- gettimeofday(&tv, NULL);
+ int hlen;
- /* check IP header */
- iphdr = (struct iphdr *) buf;
- hlen = iphdr->ihl << 2;
/* 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 */
+ return; /* not our ping */
if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
- u_int16_t recv_seq = ntohs(icmppkt->icmp_seq);
- ++nreceived;
- tp = (struct timeval *) icmppkt->icmp_data;
-
- if ((tv.tv_usec -= tp->tv_usec) < 0) {
- --tv.tv_sec;
- tv.tv_usec += 1000000;
- }
- tv.tv_sec -= tp->tv_sec;
-
- triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
- tsum += triptime;
- if (triptime < tmin)
- tmin = triptime;
- if (triptime > tmax)
- tmax = triptime;
+ 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];
- if (TST(recv_seq % MAX_DUP_CHK)) {
- ++nrepeats;
- --nreceived;
- dupflag = 1;
- } else {
- SET(recv_seq % MAX_DUP_CHK);
- dupflag = 0;
- }
+ /* discard if too short */
+ if (sz < (datalen + sizeof(struct icmp6_hdr)))
+ return;
- if (options & O_QUIET)
- return;
-
- printf("%d bytes from %s: icmp_seq=%u", sz,
- inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
- recv_seq);
- printf(" ttl=%d", iphdr->ttl);
- printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
- if (dupflag)
- printf(" (DUP!)");
- printf("\n");
- } else
- if (icmppkt->icmp_type != ICMP_ECHO)
- bb_error_msg("Warning: Got ICMP %d (%s)",
- icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
- fflush(stdout);
+ 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 ping(const char *host)
+static void ping4(len_and_sockaddr *lsa)
{
- char packet[datalen + MAXIPLEN + MAXICMPLEN];
int sockopt;
- pingsock = create_icmp_socket();
-
- memset(&pingaddr, 0, sizeof(struct sockaddr_in));
-
- pingaddr.sin_family = AF_INET;
- hostent = xgethostbyname(host);
- if (hostent->h_addrtype != AF_INET)
- bb_error_msg_and_die("unknown address type; only AF_INET is currently supported.");
-
- memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr));
+ 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 */
- sockopt = 1;
- setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
- sizeof(sockopt));
+ setsockopt_broadcast(pingsock);
- /* set recv buf for broadcast pings */
- sockopt = 48 * 1024;
- setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
- sizeof(sockopt));
+ /* 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_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
- printf("PING %s (%s): %d data bytes\n",
- hostent->h_name,
- inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
- datalen);
+ if (opt_ttl != 0) {
+ setsockopt_int(pingsock, IPPROTO_IP, IP_TTL, opt_ttl);
+ /* above doesnt affect packets sent to bcast IP, so... */
+ setsockopt_int(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, opt_ttl);
+ }
- signal(SIGINT, pingstats);
+ signal(SIGINT, print_stats_and_exit);
/* start the ping's going ... */
- sendping(0);
+ sendping4(0);
/* listen for replies */
while (1) {
socklen_t fromlen = (socklen_t) sizeof(from);
int c;
- if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &from, &fromlen)) < 0) {
- if (errno == EINTR)
- continue;
- bb_perror_msg("recvfrom");
+ 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;
}
- unpack(packet, c, &from);
- if (pingcount > 0 && nreceived >= pingcount)
+ unpack4(G.rcv_packet, c, &from);
+ if (pingcount && G.nreceived >= pingcount)
break;
}
- pingstats(0);
}
-
-int ping_main(int argc, char **argv)
+#if ENABLE_PING6
+static void ping6(len_and_sockaddr *lsa)
{
- char *thisarg;
+ 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(%s)", "ICMP6_FILTER");
+ }
+#endif /*ICMP6_FILTER*/
- datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
+ /* enable broadcast pings */
+ setsockopt_broadcast(pingsock);
- argc--;
- argv++;
- options = 0;
- /* Parse any options */
- while (argc >= 1 && **argv == '-') {
- thisarg = *argv;
- thisarg++;
- switch (*thisarg) {
- case 'q':
- options |= O_QUIET;
- break;
- case 'c':
- if (--argc <= 0)
- bb_show_usage();
- argv++;
- pingcount = atoi(*argv);
- break;
- case 's':
- if (--argc <= 0)
- bb_show_usage();
- argv++;
- datalen = atoi(*argv);
+ /* 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_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
+
+ sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
+ BUILD_BUG_ON(offsetof(struct icmp6_hdr, icmp6_cksum) != 2);
+ setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
+
+ /* request ttl info to be returned in ancillary data */
+ setsockopt_1(pingsock, SOL_IPV6, IPV6_HOPLIMIT);
+
+ 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;
- default:
- bb_show_usage();
+ }
+}
+#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, *str_p;
+
+ 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";
+ opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I, &str_p);
+ 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 */
}
- argc--;
- argv++;
}
- if (argc < 1)
- bb_show_usage();
+ if (opt & OPT_p)
+ G.pattern = xstrtou_range(str_p, 16, 0, 255);
+
+ 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
- myid = getpid() & 0xFFFF;
- ping(*argv);
- return EXIT_SUCCESS;
+ 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 /* ! CONFIG_FEATURE_FANCY_PING */
+#endif /* FEATURE_FANCY_PING */
+
+
+#if ENABLE_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
+}
+#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.
+ */
projects / oweals / busybox.git / blobdiff