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528 lines
14 KiB
C
528 lines
14 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* $Id: ping6.c,v 1.6 2004/03/15 08:28:48 andersen Exp $
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* Mini ping implementation for busybox
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*
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* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This version of ping is adapted from the ping in netkit-base 0.10,
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* which is:
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*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Mike Muuss.
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*
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* Original copyright notice is retained at the end of this file.
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*
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* This version is an adaptation of ping.c from busybox.
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* The code was modified by Bart Visscher <magick@linux-fan.com>
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <sys/times.h>
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#include <signal.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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#include <netinet/icmp6.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stddef.h> /* offsetof */
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#include "busybox.h"
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enum {
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DEFDATALEN = 56,
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MAXIPLEN = 60,
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MAXICMPLEN = 76,
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MAXPACKET = 65468,
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MAX_DUP_CHK = (8 * 128),
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MAXWAIT = 10,
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PINGINTERVAL = 1 /* second */
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};
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#define O_QUIET (1 << 0)
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#define O_VERBOSE (1 << 1)
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#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
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#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
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#define SET(bit) (A(bit) |= B(bit))
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#define CLR(bit) (A(bit) &= (~B(bit)))
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#define TST(bit) (A(bit) & B(bit))
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static void ping(const char *host);
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/* simple version */
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#ifndef CONFIG_FEATURE_FANCY_PING6
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static struct hostent *h;
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void noresp(int ign)
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{
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printf("No response from %s\n", h->h_name);
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exit(EXIT_FAILURE);
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}
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static void ping(const char *host)
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{
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struct sockaddr_in6 pingaddr;
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struct icmp6_hdr *pkt;
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int pingsock, c;
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int sockopt;
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char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
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pingsock = create_icmp6_socket();
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memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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pingaddr.sin6_family = AF_INET6;
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h = xgethostbyname2(host, AF_INET6);
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memcpy(&pingaddr.sin6_addr, h->h_addr, sizeof(pingaddr.sin6_addr));
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pkt = (struct icmp6_hdr *) packet;
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memset(pkt, 0, sizeof(packet));
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pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
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sizeof(sockopt));
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c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
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if (c < 0 || c != sizeof(packet))
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bb_perror_msg_and_die("sendto");
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signal(SIGALRM, noresp);
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alarm(5); /* give the host 5000ms to respond */
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/* listen for replies */
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while (1) {
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struct sockaddr_in6 from;
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size_t fromlen = sizeof(from);
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if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &from, &fromlen)) < 0) {
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if (errno == EINTR)
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continue;
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bb_perror_msg("recvfrom");
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continue;
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}
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if (c >= 8) { /* icmp6_hdr */
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pkt = (struct icmp6_hdr *) packet;
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if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
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break;
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}
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}
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printf("%s is alive!\n", h->h_name);
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return;
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}
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int ping6_main(int argc, char **argv)
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{
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argc--;
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argv++;
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if (argc < 1)
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bb_show_usage();
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ping(*argv);
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return EXIT_SUCCESS;
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}
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#else /* ! CONFIG_FEATURE_FANCY_PING6 */
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/* full(er) version */
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static struct sockaddr_in6 pingaddr;
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static int pingsock = -1;
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static int datalen; /* intentionally uninitialized to work around gcc bug */
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static char* ifname;
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static long ntransmitted, nreceived, nrepeats, pingcount;
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static int myid, options;
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static unsigned long tmin = ULONG_MAX, tmax, tsum;
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static char rcvd_tbl[MAX_DUP_CHK / 8];
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# ifdef CONFIG_FEATURE_FANCY_PING
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extern
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# endif
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struct hostent *hostent;
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static void sendping(int);
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static void pingstats(int);
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static void unpack(char *, int, struct sockaddr_in6 *, int);
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/**************************************************************************/
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static void pingstats(int junk)
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{
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int status;
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signal(SIGINT, SIG_IGN);
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printf("\n--- %s ping statistics ---\n", hostent->h_name);
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printf("%ld packets transmitted, ", ntransmitted);
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printf("%ld packets received, ", nreceived);
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if (nrepeats)
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printf("%ld duplicates, ", nrepeats);
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if (ntransmitted)
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printf("%ld%% packet loss\n",
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(ntransmitted - nreceived) * 100 / ntransmitted);
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if (nreceived)
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printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
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tmin / 10, tmin % 10,
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(tsum / (nreceived + nrepeats)) / 10,
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(tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
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if (nreceived != 0)
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status = EXIT_SUCCESS;
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else
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status = EXIT_FAILURE;
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exit(status);
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}
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static void sendping(int junk)
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{
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struct icmp6_hdr *pkt;
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int i;
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char packet[datalen + sizeof (struct icmp6_hdr)];
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pkt = (struct icmp6_hdr *) packet;
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pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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pkt->icmp6_code = 0;
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pkt->icmp6_cksum = 0;
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pkt->icmp6_seq = ntransmitted++;
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pkt->icmp6_id = myid;
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CLR(pkt->icmp6_seq % MAX_DUP_CHK);
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gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
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i = sendto(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
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if (i < 0)
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bb_perror_msg_and_die("sendto");
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else if ((size_t)i != sizeof(packet))
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bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
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(int)sizeof(packet));
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signal(SIGALRM, sendping);
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if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
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alarm(PINGINTERVAL);
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} else { /* done, wait for the last ping to come back */
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/* todo, don't necessarily need to wait so long... */
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signal(SIGALRM, pingstats);
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alarm(MAXWAIT);
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}
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}
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/* RFC3542 changed some definitions from RFC2292 for no good reason, whee !
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* the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
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#ifndef MLD_LISTENER_QUERY
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# define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
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#endif
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#ifndef MLD_LISTENER_REPORT
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# define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
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#endif
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#ifndef MLD_LISTENER_REDUCTION
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# define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
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#endif
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static char *icmp6_type_name (int id)
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{
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switch (id) {
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case ICMP6_DST_UNREACH: return "Destination Unreachable";
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case ICMP6_PACKET_TOO_BIG: return "Packet too big";
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case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
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case ICMP6_PARAM_PROB: return "Parameter Problem";
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case ICMP6_ECHO_REPLY: return "Echo Reply";
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case ICMP6_ECHO_REQUEST: return "Echo Request";
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case MLD_LISTENER_QUERY: return "Listener Query";
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case MLD_LISTENER_REPORT: return "Listener Report";
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case MLD_LISTENER_REDUCTION: return "Listener Reduction";
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default: return "unknown ICMP type";
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}
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}
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static void unpack(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
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{
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struct icmp6_hdr *icmppkt;
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struct timeval tv, *tp;
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int dupflag;
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unsigned long triptime;
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char buf[INET6_ADDRSTRLEN];
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gettimeofday(&tv, NULL);
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/* discard if too short */
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if (sz < (datalen + sizeof(struct icmp6_hdr)))
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return;
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icmppkt = (struct icmp6_hdr *) packet;
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if (icmppkt->icmp6_id != myid)
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return; /* not our ping */
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if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
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++nreceived;
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tp = (struct timeval *) &icmppkt->icmp6_data8[4];
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if ((tv.tv_usec -= tp->tv_usec) < 0) {
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--tv.tv_sec;
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tv.tv_usec += 1000000;
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}
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tv.tv_sec -= tp->tv_sec;
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triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
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tsum += triptime;
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if (triptime < tmin)
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tmin = triptime;
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if (triptime > tmax)
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tmax = triptime;
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if (TST(icmppkt->icmp6_seq % MAX_DUP_CHK)) {
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++nrepeats;
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--nreceived;
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dupflag = 1;
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} else {
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SET(icmppkt->icmp6_seq % MAX_DUP_CHK);
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dupflag = 0;
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}
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if (options & O_QUIET)
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return;
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printf("%d bytes from %s: icmp6_seq=%u", sz,
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inet_ntop(AF_INET6, &pingaddr.sin6_addr,
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buf, sizeof(buf)),
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icmppkt->icmp6_seq);
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printf(" ttl=%d time=%lu.%lu ms", hoplimit,
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triptime / 10, triptime % 10);
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if (dupflag)
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printf(" (DUP!)");
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printf("\n");
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} else
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if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST)
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bb_error_msg("Warning: Got ICMP %d (%s)",
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icmppkt->icmp6_type, icmp6_type_name (icmppkt->icmp6_type));
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}
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static void ping(const char *host)
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{
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char packet[datalen + MAXIPLEN + MAXICMPLEN];
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char buf[INET6_ADDRSTRLEN];
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int sockopt;
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struct msghdr msg;
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struct sockaddr_in6 from;
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struct iovec iov;
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char control_buf[CMSG_SPACE(36)];
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pingsock = create_icmp6_socket();
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memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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pingaddr.sin6_family = AF_INET6;
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hostent = xgethostbyname2(host, AF_INET6);
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if (hostent->h_addrtype != AF_INET6)
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bb_error_msg_and_die("unknown address type; only AF_INET6 is currently supported.");
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memcpy(&pingaddr.sin6_addr, hostent->h_addr, sizeof(pingaddr.sin6_addr));
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#ifdef ICMP6_FILTER
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{
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struct icmp6_filter filt;
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if (!(options & O_VERBOSE)) {
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ICMP6_FILTER_SETBLOCKALL(&filt);
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#if 0
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if ((options & F_FQDN) || (options & F_FQDNOLD) ||
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(options & F_NODEADDR) || (options & F_SUPTYPES))
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ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
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else
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#endif
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ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
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} else {
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ICMP6_FILTER_SETPASSALL(&filt);
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}
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if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
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sizeof(filt)) < 0)
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bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
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}
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#endif /*ICMP6_FILTER*/
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/* enable broadcast pings */
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sockopt = 1;
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setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
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sizeof(sockopt));
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/* set recv buf for broadcast pings */
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sockopt = 48 * 1024;
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setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
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sizeof(sockopt));
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sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
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sizeof(sockopt));
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sockopt = 1;
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setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
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sizeof(sockopt));
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if (ifname) {
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if ((pingaddr.sin6_scope_id = if_nametoindex(ifname)) == 0)
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bb_error_msg_and_die("%s: invalid interface name", ifname);
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}
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printf("PING %s (%s): %d data bytes\n",
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hostent->h_name,
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inet_ntop(AF_INET6, &pingaddr.sin6_addr,
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buf, sizeof(buf)),
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datalen);
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signal(SIGINT, pingstats);
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/* start the ping's going ... */
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sendping(0);
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/* listen for replies */
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msg.msg_name=&from;
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msg.msg_namelen=sizeof(from);
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msg.msg_iov=&iov;
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msg.msg_iovlen=1;
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msg.msg_control=control_buf;
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iov.iov_base=packet;
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iov.iov_len=sizeof(packet);
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while (1) {
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int c;
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struct cmsghdr *cmsgptr = NULL;
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int hoplimit=-1;
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msg.msg_controllen=sizeof(control_buf);
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if ((c = recvmsg(pingsock, &msg, 0)) < 0) {
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if (errno == EINTR)
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continue;
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bb_perror_msg("recvfrom");
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continue;
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}
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for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
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cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) {
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if (cmsgptr->cmsg_level == SOL_IPV6 &&
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cmsgptr->cmsg_type == IPV6_HOPLIMIT ) {
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hoplimit=*(int*)CMSG_DATA(cmsgptr);
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}
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}
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unpack(packet, c, &from, hoplimit);
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if (pingcount > 0 && nreceived >= pingcount)
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break;
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}
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pingstats(0);
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}
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int ping6_main(int argc, char **argv)
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{
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char *thisarg;
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datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
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argc--;
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argv++;
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options = 0;
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/* Parse any options */
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while (argc >= 1 && **argv == '-') {
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thisarg = *argv;
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thisarg++;
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switch (*thisarg) {
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case 'v':
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options &= ~O_QUIET;
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options |= O_VERBOSE;
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break;
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case 'q':
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options &= ~O_VERBOSE;
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options |= O_QUIET;
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break;
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case 'c':
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if (--argc <= 0)
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bb_show_usage();
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argv++;
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pingcount = atoi(*argv);
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break;
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case 's':
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if (--argc <= 0)
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bb_show_usage();
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argv++;
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datalen = atoi(*argv);
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break;
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case 'I':
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if (--argc <= 0)
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bb_show_usage();
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argv++;
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ifname = *argv;
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break;
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default:
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bb_show_usage();
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}
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argc--;
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argv++;
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}
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if (argc < 1)
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bb_show_usage();
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myid = getpid() & 0xFFFF;
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ping(*argv);
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return EXIT_SUCCESS;
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}
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#endif /* ! CONFIG_FEATURE_FANCY_PING6 */
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/*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Mike Muuss.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
|
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* 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.
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|
*/
|