*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
+/* 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 "busybox.h"
+#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,
MAXPACKET = 65468,
MAX_DUP_CHK = (8 * 128),
MAXWAIT = 10,
- PINGINTERVAL = 1 /* second */
+ PINGINTERVAL = 1, /* 1 second */
};
-static void ping(const char *host);
-
/* common routines */
static int in_cksum(unsigned short *buf, int sz)
return ans;
}
-#ifndef CONFIG_FEATURE_FANCY_PING
+#if !ENABLE_FEATURE_FANCY_PING
/* simple version */
static char *hostname;
-static void noresp(int ign)
+static void noresp(int ign ATTRIBUTE_UNUSED)
{
printf("No response from %s\n", hostname);
exit(EXIT_FAILURE);
}
-static void ping(const char *host)
+static void ping(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(pingaddr));
-
- pingaddr.sin_family = AF_INET;
- h = xgethostbyname(host);
- memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
- hostname = h->h_name;
+ pingaddr = lsa->sin;
pkt = (struct icmp *) packet;
memset(pkt, 0, sizeof(packet));
pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0,
- (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+ (struct sockaddr *) &pingaddr, sizeof(pingaddr));
if (c < 0) {
- if (ENABLE_FEATURE_CLEAN_UP) close(pingsock);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(pingsock);
bb_perror_msg_and_die("sendto");
}
- signal(SIGALRM, noresp);
- alarm(5); /* give the host 5000ms to respond */
/* listen for replies */
while (1) {
struct sockaddr_in from;
}
if (ENABLE_FEATURE_CLEAN_UP)
close(pingsock);
- printf("%s is alive!\n", hostname);
}
+#if ENABLE_PING6
+static void ping6(len_and_sockaddr *lsa)
+{
+ struct sockaddr_in6 pingaddr;
+ struct icmp6_hdr *pkt;
+ int pingsock, c;
+ int sockopt;
+ char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+
+ pingsock = create_icmp6_socket();
+ pingaddr = lsa->sin6;
+
+ pkt = (struct icmp6_hdr *) packet;
+ memset(pkt, 0, sizeof(packet));
+ pkt->icmp6_type = ICMP6_ECHO_REQUEST;
+
+ sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
+ setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
+
+ c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
+ (struct sockaddr *) &pingaddr, sizeof(pingaddr));
+
+ if (c < 0) {
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(pingsock);
+ bb_perror_msg_and_die("sendto");
+ }
+
+ /* listen for replies */
+ while (1) {
+ struct sockaddr_in6 from;
+ socklen_t fromlen = sizeof(from);
+
+ c = recvfrom(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &from, &fromlen);
+ if (c < 0) {
+ if (errno != EINTR)
+ bb_perror_msg("recvfrom");
+ continue;
+ }
+ if (c >= 8) { /* icmp6_hdr */
+ pkt = (struct icmp6_hdr *) packet;
+ if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
+ break;
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(pingsock);
+}
+#endif
+
int ping_main(int argc, char **argv)
{
- argc--;
+ len_and_sockaddr *lsa;
+#if ENABLE_PING6
+ sa_family_t af = AF_UNSPEC;
+ while (++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++;
- if (argc < 1)
+#endif
+
+ hostname = *argv;
+ if (!hostname)
bb_show_usage();
- ping(*argv);
+
+#if ENABLE_PING6
+ lsa = host_and_af2sockaddr(hostname, 0, af);
+#else
+ lsa = host_and_af2sockaddr(hostname, 0, AF_INET);
+#endif
+ /* Set timer _after_ DNS resolution */
+ signal(SIGALRM, noresp);
+ alarm(5); /* give the host 5000ms to respond */
+
+#if ENABLE_PING6
+ if (lsa->sa.sa_family == AF_INET6)
+ ping6(lsa);
+ else
+#endif
+ ping(lsa);
+ printf("%s is alive!\n", hostname);
return EXIT_SUCCESS;
}
-#else /* ! CONFIG_FEATURE_FANCY_PING */
+
+#else /* FEATURE_FANCY_PING */
+
/* full(er) version */
-#define OPT_STRING "qc:s:I:"
+#define OPT_STRING ("qvc:s:I:4" USE_PING6("6"))
enum {
OPT_QUIET = 1 << 0,
+ OPT_VERBOSE = 1 << 1,
+ OPT_c = 1 << 2,
+ OPT_s = 1 << 3,
+ OPT_I = 1 << 4,
+ OPT_IPV4 = 1 << 5,
+ OPT_IPV6 = (1 << 6) * ENABLE_PING6,
};
-static struct sockaddr_in pingaddr;
+
+static union {
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+#if ENABLE_PING6
+ struct sockaddr_in sin6;
+#endif
+} pingaddr;
static struct sockaddr_in sourceaddr;
static int pingsock = -1;
static unsigned datalen; /* intentionally uninitialized to work around gcc bug */
+static int if_index;
+
static unsigned long ntransmitted, nreceived, nrepeats, pingcount;
static int myid;
static unsigned long tmin = ULONG_MAX, tmax, tsum;
static char rcvd_tbl[MAX_DUP_CHK / 8];
-static struct hostent *hostent;
-
-static void sendping(int);
-static void pingstats(int);
-static void unpack(char *, int, struct sockaddr_in *);
+static const char *hostname;
+static const char *dotted;
#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
/**************************************************************************/
-static void pingstats(int junk)
+static void pingstats(void)
{
int status;
signal(SIGINT, SIG_IGN);
- printf("\n--- %s ping statistics ---\n", hostent->h_name);
+ printf("\n--- %s ping statistics ---\n", hostname);
printf("%lu packets transmitted, ", ntransmitted);
printf("%lu packets received, ", nreceived);
if (nrepeats)
printf("%lu duplicates, ", nrepeats);
if (ntransmitted)
- printf("%lu%% packet loss\n",
- (ntransmitted - nreceived) * 100 / ntransmitted);
+ ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted);
+ printf("%lu%% packet loss\n", 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);
+ tmin / 10, tmin % 10,
+ (tsum / (nreceived + nrepeats)) / 10,
+ (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
if (nreceived != 0)
status = EXIT_SUCCESS;
else
exit(status);
}
-static void sendping(int junk)
+static void sendping(int junk ATTRIBUTE_UNUSED)
{
struct icmp *pkt;
int i;
pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
i = sendto(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+ &pingaddr.sa, sizeof(pingaddr.sin));
if (i < 0)
bb_perror_msg_and_die("sendto");
signal(SIGALRM, sendping);
if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
alarm(PINGINTERVAL);
- } else { /* done, wait for the last ping to come back */
+ } else { /* done, wait for the last ping to come back */
+ /* todo, don't necessarily need to wait so long... */
+ signal(SIGALRM, pingstats);
+ alarm(MAXWAIT);
+ }
+}
+#if ENABLE_PING6
+static void sendping6(int junk ATTRIBUTE_UNUSED)
+{
+ struct icmp6_hdr *pkt;
+ int i;
+ char packet[datalen + sizeof (struct icmp6_hdr)];
+
+ pkt = (struct icmp6_hdr *) packet;
+
+ pkt->icmp6_type = ICMP6_ECHO_REQUEST;
+ pkt->icmp6_code = 0;
+ pkt->icmp6_cksum = 0;
+ pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
+ pkt->icmp6_id = myid;
+ CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
+ ntransmitted++;
+
+ gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
+
+ i = sendto(pingsock, packet, sizeof(packet), 0,
+ &pingaddr.sa, sizeof(pingaddr.sin6));
+
+ if (i < 0)
+ bb_perror_msg_and_die("sendto");
+ if ((size_t)i != sizeof(packet))
+ bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
+ (int)sizeof(packet));
+
+ signal(SIGALRM, sendping6);
+ 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);
}
}
+#endif
static char *icmp_type_name(int id)
{
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 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(char *buf, int sz, struct sockaddr_in *from)
{
}
fflush(stdout);
}
+#if ENABLE_PING6
+static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
+{
+ struct icmp6_hdr *icmppkt;
+ struct timeval tv, *tp;
+ int dupflag;
+ unsigned long triptime;
+ char buf[INET6_ADDRSTRLEN];
+
+ gettimeofday(&tv, NULL);
+
+ /* 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);
+ ++nreceived;
+ tp = (struct timeval *) &icmppkt->icmp6_data8[4];
+
+ if ((tv.tv_usec -= tp->tv_usec) < 0) {
+ --tv.tv_sec;
+ tv.tv_usec += 1000000;
+ }
+ tv.tv_sec -= tp->tv_sec;
+
+ triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
+ tsum += triptime;
+ if (triptime < tmin)
+ tmin = triptime;
+ if (triptime > tmax)
+ tmax = triptime;
+
+ if (TST(recv_seq % MAX_DUP_CHK)) {
+ ++nrepeats;
+ --nreceived;
+ dupflag = 1;
+ } else {
+ SET(recv_seq % MAX_DUP_CHK);
+ dupflag = 0;
+ }
+
+ if (option_mask32 & OPT_QUIET)
+ return;
+
+ printf("%d bytes from %s: icmp6_seq=%u", sz,
+ inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr,
+ buf, sizeof(buf)),
+ recv_seq);
+ printf(" ttl=%d time=%lu.%lu ms", hoplimit,
+ triptime / 10, triptime % 10);
+ if (dupflag)
+ printf(" (DUP!)");
+ puts("");
+ } 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));
+ }
+ fflush(stdout);
+}
+#endif
-static void ping(const char *host)
+static void ping(len_and_sockaddr *lsa)
{
char packet[datalen + MAXIPLEN + MAXICMPLEN];
int sockopt;
pingsock = create_icmp_socket();
-
+ pingaddr.sin = lsa->sin;
if (sourceaddr.sin_addr.s_addr) {
xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr));
}
- memset(&pingaddr, 0, sizeof(pingaddr));
-
- pingaddr.sin_family = AF_INET;
- hostent = xgethostbyname(host);
- if (hostent->h_addrtype != AF_INET)
- bb_error_msg_and_die("unknown address type; only AF_INET is currently supported");
-
- memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr));
-
/* enable broadcast pings */
setsockopt_broadcast(pingsock);
sockopt = 48 * 1024; /* explain why 48k? */
setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
- printf("PING %s (%s)",
- hostent->h_name,
- inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr));
+ printf("PING %s (%s)", hostname, dotted);
if (sourceaddr.sin_addr.s_addr) {
printf(" from %s",
inet_ntoa(*(struct in_addr *) &sourceaddr.sin_addr.s_addr));
if (pingcount > 0 && nreceived >= pingcount)
break;
}
- pingstats(0);
}
+#if ENABLE_PING6
+extern int BUG_bad_offsetof_icmp6_cksum(void);
+static void ping6(len_and_sockaddr *lsa)
+{
+ char packet[datalen + MAXIPLEN + MAXICMPLEN];
+ char buf[INET6_ADDRSTRLEN];
+ int sockopt;
+ struct msghdr msg;
+ struct sockaddr_in6 from;
+ struct iovec iov;
+ char control_buf[CMSG_SPACE(36)];
+
+ pingsock = create_icmp6_socket();
+ pingaddr.sin6 = lsa->sin6;
+ //if (sourceaddr.sin_addr.s_addr) {
+ // xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr));
+ //}
+
+#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 for broadcast pings */
+ sockopt = 48 * 1024; /* explain why 48k? */
+ 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_scope_id = if_index;
+
+ printf("PING %s (%s): %d data bytes\n", hostname, dotted, datalen);
+
+ signal(SIGINT, pingstats);
+
+ /* 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 = packet;
+ iov.iov_len = sizeof(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);
+ }
+ }
+ unpack6(packet, c, &from, hoplimit);
+ if (pingcount > 0 && nreceived >= pingcount)
+ break;
+ }
+}
+#endif
/* TODO: consolidate ether-wake.c, dnsd.c, ifupdown.c, nslookup.c
* versions of below thing. BTW we have far too many "%u.%u.%u.%u" too...
int ping_main(int argc, char **argv)
{
+ const char *hostname;
char *opt_c, *opt_s, *opt_I;
+ USE_PING6(sa_family_t af = AF_UNSPEC;)
datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
- /* exactly one argument needed */
- opt_complementary = "=1";
+ /* exactly one argument needed, -v and -q don't mix. So do 4, 6 */
+ opt_complementary = "=1:q--v:v--q" USE_PING6(":4--6:6--4");
getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I);
- if (option_mask32 & 2) pingcount = xatoul(opt_c); // -c
- if (option_mask32 & 4) datalen = xatou16(opt_s); // -s
- if (option_mask32 & 8) { // -I
-/* TODO: ping6 accepts iface too:
- if_index = if_nametoindex(*argv);
- if (!if_index) ...
-make it true for ping. */
- if (parse_nipquad(opt_I, &sourceaddr))
- bb_show_usage();
+ if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c
+ if (option_mask32 & OPT_s) datalen = xatou16(opt_s); // -s
+ if (option_mask32 & OPT_I) { // -I
+ if_index = if_nametoindex(opt_I);
+ if (!if_index)
+ if (parse_nipquad(opt_I, &sourceaddr))
+ bb_show_usage();
}
-
myid = (int16_t) getpid();
- ping(argv[optind]);
+ hostname = argv[optind];
+#if ENABLE_PING6
+ if (option_mask32 & OPT_IPV4)
+ af = AF_INET;
+ if (option_mask32 & OPT_IPV6)
+ af = AF_INET6;
+ lsa = host_and_af2sockaddr(hostname, 0, af);
+#else
+ lsa = host_and_af2sockaddr(hostname, 0, AF_INET);
+#endif
+ dotted = xmalloc_sockaddr2dotted_noport(lsa->sa, lsa->len);
+#if ENABLE_PING6
+ if (lsa->sa.sa_family == AF_INET6)
+ ping6(lsa);
+ else
+#endif
+ ping(lsa);
+ pingstats();
return EXIT_SUCCESS;
}
-#endif /* ! CONFIG_FEATURE_FANCY_PING */
+#endif /* FEATURE_FANCY_PING */
+
+
+#if ENABLE_PING6
+int ping6_main(int argc, char **argv)
+{
+ argv[0] = "-6";
+ return ping_main(argc + 1, argv - 1);
+}
+#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.
+ */
+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * Mini ping implementation for busybox
- *
- * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- *
- * This version of ping is adapted from the ping in netkit-base 0.10,
- * which is:
- *
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Mike Muuss.
- *
- * Original copyright notice is retained at the end of this file.
- *
- * This version is an adaptation of ping.c from busybox.
- * The code was modified by Bart Visscher <magick@linux-fan.com>
- */
-
-#include <netinet/icmp6.h>
-#include <net/if.h>
-#include "busybox.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
-
-enum {
- DEFDATALEN = 56,
- MAXIPLEN = 60,
- MAXICMPLEN = 76,
- MAXPACKET = 65468,
- MAX_DUP_CHK = (8 * 128),
- MAXWAIT = 10,
- PINGINTERVAL = 1 /* second */
-};
-
-static void ping(const char *host);
-
-#ifndef CONFIG_FEATURE_FANCY_PING6
-
-/* simple version */
-
-static const char *hostname;
-
-static void noresp(int ign)
-{
- printf("No response from %s\n", hostname);
- exit(EXIT_FAILURE);
-}
-
-static void ping(const char *host)
-{
- len_and_sockaddr *lsa;
- struct sockaddr_in6 pingaddr;
- struct icmp6_hdr *pkt;
- int pingsock, c;
- int sockopt;
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
-
- hostname = host;
-
- pingsock = create_icmp6_socket();
-
- lsa = host_and_af2sockaddr(host, 0, AF_INET6);
- pingaddr = lsa->sin6;
-
- pkt = (struct icmp6_hdr *) packet;
- memset(pkt, 0, sizeof(packet));
- pkt->icmp6_type = ICMP6_ECHO_REQUEST;
-
- sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
- setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
-
- c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
- (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
-
- if (c < 0) {
- if (ENABLE_FEATURE_CLEAN_UP) close(pingsock);
- bb_perror_msg_and_die("sendto");
- }
-
- signal(SIGALRM, noresp);
- alarm(5); /* give the host 5000ms to respond */
- /* listen for replies */
- while (1) {
- struct sockaddr_in6 from;
- socklen_t fromlen = sizeof(from);
-
- c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &from, &fromlen);
- if (c < 0) {
- if (errno != EINTR)
- bb_perror_msg("recvfrom");
- continue;
- }
- if (c >= 8) { /* icmp6_hdr */
- pkt = (struct icmp6_hdr *) packet;
- if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
- break;
- }
- }
- if (ENABLE_FEATURE_CLEAN_UP)
- close(pingsock);
- printf("%s is alive!\n", hostname);
-}
-
-int ping6_main(int argc, char **argv)
-{
- argc--;
- argv++;
- if (argc < 1)
- bb_show_usage();
- ping(*argv);
- return EXIT_SUCCESS;
-}
-
-#else /* ! CONFIG_FEATURE_FANCY_PING6 */
-
-/* full(er) version */
-
-#define OPT_STRING "qvc:s:I:"
-enum {
- OPT_QUIET = 1 << 0,
- OPT_VERBOSE = 1 << 1,
-};
-
-static struct sockaddr_in6 pingaddr;
-static int pingsock = -1;
-static unsigned datalen; /* intentionally uninitialized to work around gcc bug */
-static int if_index;
-
-static unsigned long ntransmitted, nreceived, nrepeats, pingcount;
-static int myid;
-static unsigned long tmin = ULONG_MAX, tmax, tsum;
-static char rcvd_tbl[MAX_DUP_CHK / 8];
-
-static char *hostname;
-
-static void sendping(int);
-static void pingstats(int);
-static void unpack(char *, int, struct sockaddr_in6 *, int);
-
-#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 pingstats(int junk)
-{
- int status;
-
- signal(SIGINT, SIG_IGN);
-
- printf("\n--- %s ping statistics ---\n", hostname);
- printf("%lu packets transmitted, ", ntransmitted);
- printf("%lu packets received, ", nreceived);
- if (nrepeats)
- printf("%lu duplicates, ", nrepeats);
- if (ntransmitted)
- printf("%lu%% packet loss\n",
- (ntransmitted - nreceived) * 100 / ntransmitted);
- if (nreceived)
- printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
- tmin / 10, tmin % 10,
- (tsum / (nreceived + nrepeats)) / 10,
- (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
- if (nreceived != 0)
- status = EXIT_SUCCESS;
- else
- status = EXIT_FAILURE;
- exit(status);
-}
-
-static void sendping(int junk)
-{
- struct icmp6_hdr *pkt;
- int i;
- char packet[datalen + sizeof (struct icmp6_hdr)];
-
- pkt = (struct icmp6_hdr *) packet;
-
- pkt->icmp6_type = ICMP6_ECHO_REQUEST;
- pkt->icmp6_code = 0;
- pkt->icmp6_cksum = 0;
- pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
- pkt->icmp6_id = myid;
- CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
- ntransmitted++;
-
- gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
-
- i = sendto(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
-
- if (i < 0)
- bb_perror_msg_and_die("sendto");
- if ((size_t)i != sizeof(packet))
- bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
- (int)sizeof(packet));
-
- signal(SIGALRM, sendping);
- if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
- alarm(PINGINTERVAL);
- } else { /* done, wait for the last ping to come back */
- /* todo, don't necessarily need to wait so long... */
- signal(SIGALRM, pingstats);
- alarm(MAXWAIT);
- }
-}
-
-/* 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 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";
- }
-}
-
-static void unpack(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
-{
- struct icmp6_hdr *icmppkt;
- struct timeval tv, *tp;
- int dupflag;
- unsigned long triptime;
- char buf[INET6_ADDRSTRLEN];
-
- gettimeofday(&tv, NULL);
-
- /* 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);
- ++nreceived;
- tp = (struct timeval *) &icmppkt->icmp6_data8[4];
-
- if ((tv.tv_usec -= tp->tv_usec) < 0) {
- --tv.tv_sec;
- tv.tv_usec += 1000000;
- }
- tv.tv_sec -= tp->tv_sec;
-
- triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
- tsum += triptime;
- if (triptime < tmin)
- tmin = triptime;
- if (triptime > tmax)
- tmax = triptime;
-
- if (TST(recv_seq % MAX_DUP_CHK)) {
- ++nrepeats;
- --nreceived;
- dupflag = 1;
- } else {
- SET(recv_seq % MAX_DUP_CHK);
- dupflag = 0;
- }
-
- if (option_mask32 & OPT_QUIET)
- return;
-
- printf("%d bytes from %s: icmp6_seq=%u", sz,
- inet_ntop(AF_INET6, &pingaddr.sin6_addr,
- buf, sizeof(buf)),
- recv_seq);
- printf(" ttl=%d time=%lu.%lu ms", hoplimit,
- triptime / 10, triptime % 10);
- if (dupflag)
- printf(" (DUP!)");
- puts("");
- } 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));
- }
- fflush(stdout);
-}
-
-extern int BUG_bad_offsetof_icmp6_cksum(void);
-static void ping(const char *host)
-{
- len_and_sockaddr *lsa;
- char packet[datalen + MAXIPLEN + MAXICMPLEN];
- char buf[INET6_ADDRSTRLEN];
- int sockopt;
- struct msghdr msg;
- struct sockaddr_in6 from;
- struct iovec iov;
- char control_buf[CMSG_SPACE(36)];
-
- pingsock = create_icmp6_socket();
-
- lsa = host_and_af2sockaddr(host, 0, AF_INET6);
- hostname = xmalloc_sockaddr2host_noport(&lsa->sa, lsa->len);
- pingaddr = lsa->sin6;
-
-#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 for broadcast pings */
- sockopt = 48 * 1024; /* explain why 48k? */
- 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_scope_id = if_index;
-
- printf("PING %s (%s): %d data bytes\n",
- hostname,
- inet_ntop(AF_INET6, &pingaddr.sin6_addr,
- buf, sizeof(buf)),
- datalen);
-
- signal(SIGINT, pingstats);
-
- /* start the ping's going ... */
- sendping(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 = packet;
- iov.iov_len = sizeof(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);
- }
- }
- unpack(packet, c, &from, hoplimit);
- if (pingcount > 0 && nreceived >= pingcount)
- break;
- }
- pingstats(0);
-}
-
-int ping6_main(int argc, char **argv)
-{
- char *opt_c, *opt_s, *opt_I;
-
- datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
-
- /* exactly one argument needed, -v and -q don't mix */
- opt_complementary = "=1:q--v:v--q";
- getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I);
- if (option_mask32 & 4) pingcount = xatoul(opt_c); // -c
- if (option_mask32 & 8) datalen = xatou16(opt_s); // -s
- if (option_mask32 & 0x10) { // -I
- if_index = if_nametoindex(opt_I);
- if (!if_index)
- bb_error_msg_and_die(
- "%s: invalid interface name", opt_I);
- }
-
- myid = (int16_t) getpid();
- ping(argv[optind]);
- return EXIT_SUCCESS;
-}
-#endif /* ! CONFIG_FEATURE_FANCY_PING6 */
-
-/*
- * 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 / commitdiff