1 files changed, 480 insertions, 0 deletions

diff --git a/networking/ping6.c b/networking/ping6.c
new file mode 100644
index 000000000..9f0509e66
--- /dev/null
+++ b/networking/ping6.c
@@ -0,0 +1,480 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * $Id: ping6.c,v 1.6 2004/03/15 08:28:48 andersen Exp $
+ * 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 <sys/param.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/times.h>
+#include <signal.h>
+
+#include <netinet/in.h>
+#include <netinet/ip6.h>
+#include <netinet/icmp6.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>                             /* offsetof */
+#include "busybox.h"
+
+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 struct hostent *h;
+
+static void noresp(int ign)
+{
+        printf("No response from %s\n", h->h_name);
+        exit(EXIT_FAILURE);
+}
+
+static void ping(const char *host)
+{
+        struct sockaddr_in6 pingaddr;
+        struct icmp6_hdr *pkt;
+        int pingsock, c;
+        int sockopt;
+        char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+
+        pingsock = create_icmp6_socket();
+
+        memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+        pingaddr.sin6_family = AF_INET6;
+        h = xgethostbyname2(host, AF_INET6);
+        memcpy(&pingaddr.sin6_addr, h->h_addr, sizeof(pingaddr.sin6_addr));
+
+        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, (char *) &sockopt,
+                           sizeof(sockopt));
+
+        c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
+                           (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
+
+        if (c < 0 || c != sizeof(packet)) {
+                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;
+                size_t fromlen = sizeof(from);
+
+                if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
+                                                  (struct sockaddr *) &from, &fromlen)) < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        bb_perror_msg("recvfrom");
+                        continue;
+                }
+                if (c >= 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", h->h_name);
+        return;
+}
+
+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 struct hostent *hostent;
+
+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", hostent->h_name);
+        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++);
+        pkt->icmp6_id = myid;
+        CLR(pkt->icmp6_seq % MAX_DUP_CHK);
+
+        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");
+        else if ((size_t)i != sizeof(packet))
+                bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
+                           (int)sizeof(packet));
+
+        signal(SIGALRM, sendping);
+        if (pingcount == 0 || ntransmitted < pingcount) {       /* schedule next in 1s */
+                alarm(PINGINTERVAL);
+        } else {                                        /* done, wait for the last ping to come back */
+                /* todo, don't necessarily need to wait so long... */
+                signal(SIGALRM, pingstats);
+                alarm(MAXWAIT);
+        }
+}
+
+/* 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) {
+                ++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(icmppkt->icmp6_seq % MAX_DUP_CHK)) {
+                        ++nrepeats;
+                        --nreceived;
+                        dupflag = 1;
+                } else {
+                        SET(icmppkt->icmp6_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)),
+                           icmppkt->icmp6_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));
+}
+
+static void ping(const char *host)
+{
+        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();
+
+        memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+        pingaddr.sin6_family = AF_INET6;
+        hostent = xgethostbyname2(host, AF_INET6);
+        if (hostent->h_addrtype != AF_INET6)
+                bb_error_msg_and_die("unknown address type; only AF_INET6 is currently supported");
+
+        memcpy(&pingaddr.sin6_addr, hostent->h_addr, sizeof(pingaddr.sin6_addr));
+
+#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;
+        setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
+                           sizeof(sockopt));
+
+        sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
+        setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
+                           sizeof(sockopt));
+
+        sockopt = 1;
+        setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
+                           sizeof(sockopt));
+
+        if (if_index)
+                pingaddr.sin6_scope_id = if_index;
+
+        printf("PING %s (%s): %d data bytes\n",
+                   hostent->h_name,
+                   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 *cmsgptr = NULL;
+                int hoplimit = -1;
+                msg.msg_controllen = sizeof(control_buf);
+
+                if ((c = recvmsg(pingsock, &msg, 0)) < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        bb_perror_msg("recvfrom");
+                        continue;
+                }
+                for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
+                         cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) {
+                        if (cmsgptr->cmsg_level == SOL_IPV6 &&
+                                cmsgptr->cmsg_type == IPV6_HOPLIMIT ) {
+                                hoplimit = *(int*)CMSG_DATA(cmsgptr);
+                        }
+                }
+                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.
+ */