2eb6acc277
Submitted by: Ján Sučan <sucanjan@gmail.com> Differential Revision: https://reviews.freebsd.org/D22103
1775 lines
47 KiB
C
1775 lines
47 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* P I N G . C
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*
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* Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
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* measure round-trip-delays and packet loss across network paths.
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*
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* Author -
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* Mike Muuss
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* U. S. Army Ballistic Research Laboratory
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* December, 1983
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*
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* Status -
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* Public Domain. Distribution Unlimited.
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* Bugs -
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* More statistics could always be gathered.
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* This program has to run SUID to ROOT to access the ICMP socket.
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*/
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#include <sys/param.h> /* NB: we rely on this for <sys/types.h> */
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#include <sys/capsicum.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/ip_var.h>
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#include <arpa/inet.h>
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#include <libcasper.h>
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#include <casper/cap_dns.h>
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#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#endif /*IPSEC*/
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#include <capsicum_helpers.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <math.h>
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#include <netdb.h>
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#include <stddef.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <time.h>
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#include <unistd.h>
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#include "utils.h"
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#define INADDR_LEN ((int)sizeof(in_addr_t))
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#define TIMEVAL_LEN ((int)sizeof(struct tv32))
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#define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
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#define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
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#define DEFDATALEN 56 /* default data length */
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#define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
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/* runs out of buffer space */
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#define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
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#define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
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#define MAXWAIT 10000 /* max ms to wait for response */
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#define MAXALARM (60 * 60) /* max seconds for alarm timeout */
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#define MAXTOS 255
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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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struct tv32 {
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int32_t tv32_sec;
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int32_t tv32_nsec;
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};
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/* various options */
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static int options;
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#define F_FLOOD 0x0001
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#define F_INTERVAL 0x0002
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#define F_NUMERIC 0x0004
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#define F_PINGFILLED 0x0008
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#define F_QUIET 0x0010
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#define F_RROUTE 0x0020
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#define F_SO_DEBUG 0x0040
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#define F_SO_DONTROUTE 0x0080
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#define F_VERBOSE 0x0100
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#define F_QUIET2 0x0200
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#define F_NOLOOP 0x0400
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#define F_MTTL 0x0800
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#define F_MIF 0x1000
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#define F_AUDIBLE 0x2000
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#ifdef IPSEC
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#ifdef IPSEC_POLICY_IPSEC
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#define F_POLICY 0x4000
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#endif /*IPSEC_POLICY_IPSEC*/
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#endif /*IPSEC*/
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#define F_TTL 0x8000
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#define F_MISSED 0x10000
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#define F_ONCE 0x20000
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#define F_HDRINCL 0x40000
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#define F_MASK 0x80000
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#define F_TIME 0x100000
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#define F_SWEEP 0x200000
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#define F_WAITTIME 0x400000
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/*
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* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
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* number of received sequence numbers we can keep track of. Change 128
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* to 8192 for complete accuracy...
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*/
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#define MAX_DUP_CHK (8 * 128)
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static int mx_dup_ck = MAX_DUP_CHK;
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static char rcvd_tbl[MAX_DUP_CHK / 8];
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static struct sockaddr_in whereto; /* who to ping */
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static int datalen = DEFDATALEN;
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static int maxpayload;
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static int ssend; /* send socket file descriptor */
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static int srecv; /* receive socket file descriptor */
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static u_char outpackhdr[IP_MAXPACKET], *outpack;
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static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
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static char BSPACE = '\b'; /* characters written for flood */
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static char DOT = '.';
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static char *hostname;
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static char *shostname;
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static int ident; /* process id to identify our packets */
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static int uid; /* cached uid for micro-optimization */
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static u_char icmp_type = ICMP_ECHO;
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static u_char icmp_type_rsp = ICMP_ECHOREPLY;
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static int phdr_len = 0;
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static int send_len;
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/* counters */
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static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
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static long npackets; /* max packets to transmit */
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static long nreceived; /* # of packets we got back */
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static long nrepeats; /* number of duplicates */
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static long ntransmitted; /* sequence # for outbound packets = #sent */
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static long snpackets; /* max packets to transmit in one sweep */
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static long sntransmitted; /* # of packets we sent in this sweep */
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static int sweepmax; /* max value of payload in sweep */
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static int sweepmin = 0; /* start value of payload in sweep */
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static int sweepincr = 1; /* payload increment in sweep */
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static int interval = 1000; /* interval between packets, ms */
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static int waittime = MAXWAIT; /* timeout for each packet */
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static long nrcvtimeout = 0; /* # of packets we got back after waittime */
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/* timing */
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static int timing; /* flag to do timing */
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static double tmin = 999999999.0; /* minimum round trip time */
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static double tmax = 0.0; /* maximum round trip time */
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static double tsum = 0.0; /* sum of all times, for doing average */
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static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
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/* nonzero if we've been told to finish up */
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static volatile sig_atomic_t finish_up;
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static volatile sig_atomic_t siginfo_p;
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static cap_channel_t *capdns;
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static void fill(char *, char *);
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static cap_channel_t *capdns_setup(void);
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static void check_status(void);
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static void finish(void) __dead2;
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static void pinger(void);
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static char *pr_addr(struct in_addr);
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static char *pr_ntime(n_time);
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static void pr_icmph(struct icmp *, struct ip *, const u_char *const);
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static void pr_iph(struct ip *);
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static void pr_pack(char *, ssize_t, struct sockaddr_in *, struct timespec *);
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static void pr_retip(struct ip *, const u_char *);
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static void status(int);
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static void stopit(int);
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static void usage(void) __dead2;
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int
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main(int argc, char *const *argv)
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{
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struct sockaddr_in from, sock_in;
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struct in_addr ifaddr;
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struct timespec last, intvl;
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struct iovec iov;
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struct msghdr msg;
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struct sigaction si_sa;
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size_t sz;
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u_char *datap, packet[IP_MAXPACKET] __aligned(4);
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char *ep, *source, *target, *payload;
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struct hostent *hp;
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#ifdef IPSEC_POLICY_IPSEC
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char *policy_in, *policy_out;
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#endif
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struct sockaddr_in *to;
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double t;
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u_long alarmtimeout;
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long ltmp;
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int almost_done, ch, df, hold, i, icmp_len, mib[4], preload;
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int ssend_errno, srecv_errno, tos, ttl;
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char ctrl[CMSG_SPACE(sizeof(struct timespec))];
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char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
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#ifdef IP_OPTIONS
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char rspace[MAX_IPOPTLEN]; /* record route space */
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#endif
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unsigned char loop, mttl;
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payload = source = NULL;
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#ifdef IPSEC_POLICY_IPSEC
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policy_in = policy_out = NULL;
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#endif
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cap_rights_t rights;
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options |= F_NUMERIC;
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/*
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* Do the stuff that we need root priv's for *first*, and
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* then drop our setuid bit. Save error reporting for
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* after arg parsing.
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*
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* Historicaly ping was using one socket 's' for sending and for
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* receiving. After capsicum(4) related changes we use two
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* sockets. It was done for special ping use case - when user
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* issue ping on multicast or broadcast address replies come
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* from different addresses, not from the address we
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* connect(2)'ed to, and send socket do not receive those
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* packets.
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*/
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ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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ssend_errno = errno;
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srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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srecv_errno = errno;
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if (setuid(getuid()) != 0)
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err(EX_NOPERM, "setuid() failed");
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uid = getuid();
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if (ssend < 0) {
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errno = ssend_errno;
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err(EX_OSERR, "ssend socket");
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}
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if (srecv < 0) {
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errno = srecv_errno;
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err(EX_OSERR, "srecv socket");
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}
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alarmtimeout = df = preload = tos = 0;
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outpack = outpackhdr + sizeof(struct ip);
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while ((ch = getopt(argc, argv,
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"Aac:DdfG:g:Hh:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
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#ifdef IPSEC
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#ifdef IPSEC_POLICY_IPSEC
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"P:"
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#endif /*IPSEC_POLICY_IPSEC*/
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#endif /*IPSEC*/
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)) != -1)
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{
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switch(ch) {
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case 'A':
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options |= F_MISSED;
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break;
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case 'a':
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options |= F_AUDIBLE;
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break;
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case 'c':
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp <= 0)
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errx(EX_USAGE,
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"invalid count of packets to transmit: `%s'",
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optarg);
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npackets = ltmp;
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break;
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case 'D':
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options |= F_HDRINCL;
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df = 1;
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break;
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case 'd':
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options |= F_SO_DEBUG;
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break;
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case 'f':
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if (uid) {
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errno = EPERM;
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err(EX_NOPERM, "-f flag");
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}
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options |= F_FLOOD;
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setbuf(stdout, (char *)NULL);
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break;
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case 'G': /* Maximum packet size for ping sweep */
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp <= 0)
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errx(EX_USAGE, "invalid packet size: `%s'",
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optarg);
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if (uid != 0 && ltmp > DEFDATALEN) {
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errno = EPERM;
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err(EX_NOPERM,
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"packet size too large: %ld > %u",
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ltmp, DEFDATALEN);
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}
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options |= F_SWEEP;
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sweepmax = ltmp;
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break;
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case 'g': /* Minimum packet size for ping sweep */
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp <= 0)
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errx(EX_USAGE, "invalid packet size: `%s'",
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optarg);
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if (uid != 0 && ltmp > DEFDATALEN) {
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errno = EPERM;
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err(EX_NOPERM,
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"packet size too large: %ld > %u",
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ltmp, DEFDATALEN);
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}
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options |= F_SWEEP;
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sweepmin = ltmp;
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break;
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case 'H':
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options &= ~F_NUMERIC;
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break;
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case 'h': /* Packet size increment for ping sweep */
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp < 1)
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errx(EX_USAGE, "invalid increment size: `%s'",
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optarg);
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if (uid != 0 && ltmp > DEFDATALEN) {
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errno = EPERM;
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err(EX_NOPERM,
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"packet size too large: %ld > %u",
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ltmp, DEFDATALEN);
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}
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options |= F_SWEEP;
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sweepincr = ltmp;
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break;
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case 'I': /* multicast interface */
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if (inet_aton(optarg, &ifaddr) == 0)
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errx(EX_USAGE,
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"invalid multicast interface: `%s'",
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optarg);
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options |= F_MIF;
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break;
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case 'i': /* wait between sending packets */
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t = strtod(optarg, &ep) * 1000.0;
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if (*ep || ep == optarg || t > (double)INT_MAX)
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errx(EX_USAGE, "invalid timing interval: `%s'",
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optarg);
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options |= F_INTERVAL;
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interval = (int)t;
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if (uid && interval < 1000) {
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errno = EPERM;
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err(EX_NOPERM, "-i interval too short");
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}
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break;
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case 'L':
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options |= F_NOLOOP;
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loop = 0;
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break;
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case 'l':
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0)
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errx(EX_USAGE,
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"invalid preload value: `%s'", optarg);
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if (uid) {
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errno = EPERM;
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err(EX_NOPERM, "-l flag");
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}
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preload = ltmp;
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break;
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case 'M':
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switch(optarg[0]) {
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case 'M':
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case 'm':
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options |= F_MASK;
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break;
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case 'T':
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case 't':
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options |= F_TIME;
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break;
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default:
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errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
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break;
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}
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break;
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case 'm': /* TTL */
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0)
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errx(EX_USAGE, "invalid TTL: `%s'", optarg);
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ttl = ltmp;
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options |= F_TTL;
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break;
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case 'n':
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options |= F_NUMERIC;
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break;
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case 'o':
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options |= F_ONCE;
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break;
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#ifdef IPSEC
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#ifdef IPSEC_POLICY_IPSEC
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case 'P':
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options |= F_POLICY;
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if (!strncmp("in", optarg, 2))
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policy_in = strdup(optarg);
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else if (!strncmp("out", optarg, 3))
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policy_out = strdup(optarg);
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else
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errx(1, "invalid security policy");
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break;
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#endif /*IPSEC_POLICY_IPSEC*/
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#endif /*IPSEC*/
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case 'p': /* fill buffer with user pattern */
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options |= F_PINGFILLED;
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payload = optarg;
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break;
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case 'Q':
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options |= F_QUIET2;
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break;
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case 'q':
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options |= F_QUIET;
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break;
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case 'R':
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options |= F_RROUTE;
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break;
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case 'r':
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options |= F_SO_DONTROUTE;
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break;
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case 'S':
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source = optarg;
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break;
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case 's': /* size of packet to send */
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ltmp = strtol(optarg, &ep, 0);
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if (*ep || ep == optarg || ltmp < 0)
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errx(EX_USAGE, "invalid packet size: `%s'",
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optarg);
|
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if (uid != 0 && ltmp > DEFDATALEN) {
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errno = EPERM;
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err(EX_NOPERM,
|
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"packet size too large: %ld > %u",
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|
ltmp, DEFDATALEN);
|
|
}
|
|
datalen = ltmp;
|
|
break;
|
|
case 'T': /* multicast TTL */
|
|
ltmp = strtol(optarg, &ep, 0);
|
|
if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0)
|
|
errx(EX_USAGE, "invalid multicast TTL: `%s'",
|
|
optarg);
|
|
mttl = ltmp;
|
|
options |= F_MTTL;
|
|
break;
|
|
case 't':
|
|
alarmtimeout = strtoul(optarg, &ep, 0);
|
|
if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
|
|
errx(EX_USAGE, "invalid timeout: `%s'",
|
|
optarg);
|
|
if (alarmtimeout > MAXALARM)
|
|
errx(EX_USAGE, "invalid timeout: `%s' > %d",
|
|
optarg, MAXALARM);
|
|
{
|
|
struct itimerval itv;
|
|
|
|
timerclear(&itv.it_interval);
|
|
timerclear(&itv.it_value);
|
|
itv.it_value.tv_sec = (time_t)alarmtimeout;
|
|
if (setitimer(ITIMER_REAL, &itv, NULL) != 0)
|
|
err(1, "setitimer");
|
|
}
|
|
break;
|
|
case 'v':
|
|
options |= F_VERBOSE;
|
|
break;
|
|
case 'W': /* wait ms for answer */
|
|
t = strtod(optarg, &ep);
|
|
if (*ep || ep == optarg || t > (double)INT_MAX)
|
|
errx(EX_USAGE, "invalid timing interval: `%s'",
|
|
optarg);
|
|
options |= F_WAITTIME;
|
|
waittime = (int)t;
|
|
break;
|
|
case 'z':
|
|
options |= F_HDRINCL;
|
|
ltmp = strtol(optarg, &ep, 0);
|
|
if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0)
|
|
errx(EX_USAGE, "invalid TOS: `%s'", optarg);
|
|
tos = ltmp;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
|
|
if (argc - optind != 1)
|
|
usage();
|
|
target = argv[optind];
|
|
|
|
switch (options & (F_MASK|F_TIME)) {
|
|
case 0: break;
|
|
case F_MASK:
|
|
icmp_type = ICMP_MASKREQ;
|
|
icmp_type_rsp = ICMP_MASKREPLY;
|
|
phdr_len = MASK_LEN;
|
|
if (!(options & F_QUIET))
|
|
(void)printf("ICMP_MASKREQ\n");
|
|
break;
|
|
case F_TIME:
|
|
icmp_type = ICMP_TSTAMP;
|
|
icmp_type_rsp = ICMP_TSTAMPREPLY;
|
|
phdr_len = TS_LEN;
|
|
if (!(options & F_QUIET))
|
|
(void)printf("ICMP_TSTAMP\n");
|
|
break;
|
|
default:
|
|
errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
|
|
break;
|
|
}
|
|
icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
|
|
if (options & F_RROUTE)
|
|
icmp_len += MAX_IPOPTLEN;
|
|
maxpayload = IP_MAXPACKET - icmp_len;
|
|
if (datalen > maxpayload)
|
|
errx(EX_USAGE, "packet size too large: %d > %d", datalen,
|
|
maxpayload);
|
|
send_len = icmp_len + datalen;
|
|
datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
|
|
if (options & F_PINGFILLED) {
|
|
fill((char *)datap, payload);
|
|
}
|
|
capdns = capdns_setup();
|
|
if (source) {
|
|
bzero((char *)&sock_in, sizeof(sock_in));
|
|
sock_in.sin_family = AF_INET;
|
|
if (inet_aton(source, &sock_in.sin_addr) != 0) {
|
|
shostname = source;
|
|
} else {
|
|
hp = cap_gethostbyname2(capdns, source, AF_INET);
|
|
if (!hp)
|
|
errx(EX_NOHOST, "cannot resolve %s: %s",
|
|
source, hstrerror(h_errno));
|
|
|
|
sock_in.sin_len = sizeof sock_in;
|
|
if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
|
|
hp->h_length < 0)
|
|
errx(1, "gethostbyname2: illegal address");
|
|
memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
|
|
sizeof(sock_in.sin_addr));
|
|
(void)strncpy(snamebuf, hp->h_name,
|
|
sizeof(snamebuf) - 1);
|
|
snamebuf[sizeof(snamebuf) - 1] = '\0';
|
|
shostname = snamebuf;
|
|
}
|
|
if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) ==
|
|
-1)
|
|
err(1, "bind");
|
|
}
|
|
|
|
bzero(&whereto, sizeof(whereto));
|
|
to = &whereto;
|
|
to->sin_family = AF_INET;
|
|
to->sin_len = sizeof *to;
|
|
if (inet_aton(target, &to->sin_addr) != 0) {
|
|
hostname = target;
|
|
} else {
|
|
hp = cap_gethostbyname2(capdns, target, AF_INET);
|
|
if (!hp)
|
|
errx(EX_NOHOST, "cannot resolve %s: %s",
|
|
target, hstrerror(h_errno));
|
|
|
|
if ((unsigned)hp->h_length > sizeof(to->sin_addr))
|
|
errx(1, "gethostbyname2 returned an illegal address");
|
|
memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
|
|
(void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
|
|
hnamebuf[sizeof(hnamebuf) - 1] = '\0';
|
|
hostname = hnamebuf;
|
|
}
|
|
|
|
/* From now on we will use only reverse DNS lookups. */
|
|
#ifdef WITH_CASPER
|
|
if (capdns != NULL) {
|
|
const char *types[1];
|
|
|
|
types[0] = "ADDR2NAME";
|
|
if (cap_dns_type_limit(capdns, types, 1) < 0)
|
|
err(1, "unable to limit access to system.dns service");
|
|
}
|
|
#endif
|
|
if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0)
|
|
err(1, "connect");
|
|
|
|
if (options & F_FLOOD && options & F_INTERVAL)
|
|
errx(EX_USAGE, "-f and -i: incompatible options");
|
|
|
|
if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
|
|
errx(EX_USAGE,
|
|
"-f flag cannot be used with multicast destination");
|
|
if (options & (F_MIF | F_NOLOOP | F_MTTL)
|
|
&& !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
|
|
errx(EX_USAGE,
|
|
"-I, -L, -T flags cannot be used with unicast destination");
|
|
|
|
if (datalen >= TIMEVAL_LEN) /* can we time transfer */
|
|
timing = 1;
|
|
|
|
if (!(options & F_PINGFILLED))
|
|
for (i = TIMEVAL_LEN; i < datalen; ++i)
|
|
*datap++ = i;
|
|
|
|
ident = getpid() & 0xFFFF;
|
|
|
|
hold = 1;
|
|
if (options & F_SO_DEBUG) {
|
|
(void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold,
|
|
sizeof(hold));
|
|
(void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold,
|
|
sizeof(hold));
|
|
}
|
|
if (options & F_SO_DONTROUTE)
|
|
(void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
|
|
sizeof(hold));
|
|
#ifdef IPSEC
|
|
#ifdef IPSEC_POLICY_IPSEC
|
|
if (options & F_POLICY) {
|
|
char *buf;
|
|
if (policy_in != NULL) {
|
|
buf = ipsec_set_policy(policy_in, strlen(policy_in));
|
|
if (buf == NULL)
|
|
errx(EX_CONFIG, "%s", ipsec_strerror());
|
|
if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY,
|
|
buf, ipsec_get_policylen(buf)) < 0)
|
|
err(EX_CONFIG,
|
|
"ipsec policy cannot be configured");
|
|
free(buf);
|
|
}
|
|
|
|
if (policy_out != NULL) {
|
|
buf = ipsec_set_policy(policy_out, strlen(policy_out));
|
|
if (buf == NULL)
|
|
errx(EX_CONFIG, "%s", ipsec_strerror());
|
|
if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY,
|
|
buf, ipsec_get_policylen(buf)) < 0)
|
|
err(EX_CONFIG,
|
|
"ipsec policy cannot be configured");
|
|
free(buf);
|
|
}
|
|
}
|
|
#endif /*IPSEC_POLICY_IPSEC*/
|
|
#endif /*IPSEC*/
|
|
|
|
if (options & F_HDRINCL) {
|
|
struct ip ip;
|
|
|
|
memcpy(&ip, outpackhdr, sizeof(ip));
|
|
if (!(options & (F_TTL | F_MTTL))) {
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_INET;
|
|
mib[2] = IPPROTO_IP;
|
|
mib[3] = IPCTL_DEFTTL;
|
|
sz = sizeof(ttl);
|
|
if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
|
|
err(1, "sysctl(net.inet.ip.ttl)");
|
|
}
|
|
setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
|
|
ip.ip_v = IPVERSION;
|
|
ip.ip_hl = sizeof(struct ip) >> 2;
|
|
ip.ip_tos = tos;
|
|
ip.ip_id = 0;
|
|
ip.ip_off = htons(df ? IP_DF : 0);
|
|
ip.ip_ttl = ttl;
|
|
ip.ip_p = IPPROTO_ICMP;
|
|
ip.ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
|
|
ip.ip_dst = to->sin_addr;
|
|
memcpy(outpackhdr, &ip, sizeof(ip));
|
|
}
|
|
|
|
/*
|
|
* Here we enter capability mode. Further down access to global
|
|
* namespaces (e.g filesystem) is restricted (see capsicum(4)).
|
|
* We must connect(2) our socket before this point.
|
|
*/
|
|
caph_cache_catpages();
|
|
if (caph_enter_casper() < 0)
|
|
err(1, "caph_enter_casper");
|
|
|
|
cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT);
|
|
if (caph_rights_limit(srecv, &rights) < 0)
|
|
err(1, "cap_rights_limit srecv");
|
|
cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT);
|
|
if (caph_rights_limit(ssend, &rights) < 0)
|
|
err(1, "cap_rights_limit ssend");
|
|
|
|
/* record route option */
|
|
if (options & F_RROUTE) {
|
|
#ifdef IP_OPTIONS
|
|
bzero(rspace, sizeof(rspace));
|
|
rspace[IPOPT_OPTVAL] = IPOPT_RR;
|
|
rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
|
|
rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
|
|
rspace[sizeof(rspace) - 1] = IPOPT_EOL;
|
|
if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace,
|
|
sizeof(rspace)) < 0)
|
|
err(EX_OSERR, "setsockopt IP_OPTIONS");
|
|
#else
|
|
errx(EX_UNAVAILABLE,
|
|
"record route not available in this implementation");
|
|
#endif /* IP_OPTIONS */
|
|
}
|
|
|
|
if (options & F_TTL) {
|
|
if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl,
|
|
sizeof(ttl)) < 0) {
|
|
err(EX_OSERR, "setsockopt IP_TTL");
|
|
}
|
|
}
|
|
if (options & F_NOLOOP) {
|
|
if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
|
|
sizeof(loop)) < 0) {
|
|
err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
|
|
}
|
|
}
|
|
if (options & F_MTTL) {
|
|
if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
|
|
sizeof(mttl)) < 0) {
|
|
err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
|
|
}
|
|
}
|
|
if (options & F_MIF) {
|
|
if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
|
|
sizeof(ifaddr)) < 0) {
|
|
err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
|
|
}
|
|
}
|
|
#ifdef SO_TIMESTAMP
|
|
{
|
|
int on = 1;
|
|
int ts_clock = SO_TS_MONOTONIC;
|
|
if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on,
|
|
sizeof(on)) < 0)
|
|
err(EX_OSERR, "setsockopt SO_TIMESTAMP");
|
|
if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock,
|
|
sizeof(ts_clock)) < 0)
|
|
err(EX_OSERR, "setsockopt SO_TS_CLOCK");
|
|
}
|
|
#endif
|
|
if (sweepmax) {
|
|
if (sweepmin > sweepmax)
|
|
errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size");
|
|
|
|
if (datalen != DEFDATALEN)
|
|
errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
|
|
|
|
if (npackets > 0) {
|
|
snpackets = npackets;
|
|
npackets = 0;
|
|
} else
|
|
snpackets = 1;
|
|
datalen = sweepmin;
|
|
send_len = icmp_len + sweepmin;
|
|
}
|
|
if (options & F_SWEEP && !sweepmax)
|
|
errx(EX_USAGE, "Maximum sweep size must be specified");
|
|
|
|
/*
|
|
* When pinging the broadcast address, you can get a lot of answers.
|
|
* Doing something so evil is useful if you are trying to stress the
|
|
* ethernet, or just want to fill the arp cache to get some stuff for
|
|
* /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
|
|
* or multicast pings if they wish.
|
|
*/
|
|
|
|
/*
|
|
* XXX receive buffer needs undetermined space for mbuf overhead
|
|
* as well.
|
|
*/
|
|
hold = IP_MAXPACKET + 128;
|
|
(void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
|
|
sizeof(hold));
|
|
/* CAP_SETSOCKOPT removed */
|
|
cap_rights_init(&rights, CAP_RECV, CAP_EVENT);
|
|
if (caph_rights_limit(srecv, &rights) < 0)
|
|
err(1, "cap_rights_limit srecv setsockopt");
|
|
if (uid == 0)
|
|
(void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
|
|
sizeof(hold));
|
|
/* CAP_SETSOCKOPT removed */
|
|
cap_rights_init(&rights, CAP_SEND);
|
|
if (caph_rights_limit(ssend, &rights) < 0)
|
|
err(1, "cap_rights_limit ssend setsockopt");
|
|
|
|
if (to->sin_family == AF_INET) {
|
|
(void)printf("PING %s (%s)", hostname,
|
|
inet_ntoa(to->sin_addr));
|
|
if (source)
|
|
(void)printf(" from %s", shostname);
|
|
if (sweepmax)
|
|
(void)printf(": (%d ... %d) data bytes\n",
|
|
sweepmin, sweepmax);
|
|
else
|
|
(void)printf(": %d data bytes\n", datalen);
|
|
|
|
} else {
|
|
if (sweepmax)
|
|
(void)printf("PING %s: (%d ... %d) data bytes\n",
|
|
hostname, sweepmin, sweepmax);
|
|
else
|
|
(void)printf("PING %s: %d data bytes\n", hostname, datalen);
|
|
}
|
|
|
|
/*
|
|
* Use sigaction() instead of signal() to get unambiguous semantics,
|
|
* in particular with SA_RESTART not set.
|
|
*/
|
|
|
|
sigemptyset(&si_sa.sa_mask);
|
|
si_sa.sa_flags = 0;
|
|
|
|
si_sa.sa_handler = stopit;
|
|
if (sigaction(SIGINT, &si_sa, 0) == -1) {
|
|
err(EX_OSERR, "sigaction SIGINT");
|
|
}
|
|
|
|
si_sa.sa_handler = status;
|
|
if (sigaction(SIGINFO, &si_sa, 0) == -1) {
|
|
err(EX_OSERR, "sigaction");
|
|
}
|
|
|
|
if (alarmtimeout > 0) {
|
|
si_sa.sa_handler = stopit;
|
|
if (sigaction(SIGALRM, &si_sa, 0) == -1)
|
|
err(EX_OSERR, "sigaction SIGALRM");
|
|
}
|
|
|
|
bzero(&msg, sizeof(msg));
|
|
msg.msg_name = (caddr_t)&from;
|
|
msg.msg_iov = &iov;
|
|
msg.msg_iovlen = 1;
|
|
#ifdef SO_TIMESTAMP
|
|
msg.msg_control = (caddr_t)ctrl;
|
|
msg.msg_controllen = sizeof(ctrl);
|
|
#endif
|
|
iov.iov_base = packet;
|
|
iov.iov_len = IP_MAXPACKET;
|
|
|
|
if (preload == 0)
|
|
pinger(); /* send the first ping */
|
|
else {
|
|
if (npackets != 0 && preload > npackets)
|
|
preload = npackets;
|
|
while (preload--) /* fire off them quickies */
|
|
pinger();
|
|
}
|
|
(void)clock_gettime(CLOCK_MONOTONIC, &last);
|
|
|
|
if (options & F_FLOOD) {
|
|
intvl.tv_sec = 0;
|
|
intvl.tv_nsec = 10000000;
|
|
} else {
|
|
intvl.tv_sec = interval / 1000;
|
|
intvl.tv_nsec = interval % 1000 * 1000000;
|
|
}
|
|
|
|
almost_done = 0;
|
|
while (!finish_up) {
|
|
struct timespec now, timeout;
|
|
fd_set rfds;
|
|
int n;
|
|
ssize_t cc;
|
|
|
|
check_status();
|
|
if ((unsigned)srecv >= FD_SETSIZE)
|
|
errx(EX_OSERR, "descriptor too large");
|
|
FD_ZERO(&rfds);
|
|
FD_SET(srecv, &rfds);
|
|
(void)clock_gettime(CLOCK_MONOTONIC, &now);
|
|
timespecadd(&last, &intvl, &timeout);
|
|
timespecsub(&timeout, &now, &timeout);
|
|
if (timeout.tv_sec < 0)
|
|
timespecclear(&timeout);
|
|
n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL);
|
|
if (n < 0)
|
|
continue; /* Must be EINTR. */
|
|
if (n == 1) {
|
|
struct timespec *tv = NULL;
|
|
#ifdef SO_TIMESTAMP
|
|
struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
|
|
#endif
|
|
msg.msg_namelen = sizeof(from);
|
|
if ((cc = recvmsg(srecv, &msg, 0)) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
warn("recvmsg");
|
|
continue;
|
|
}
|
|
#ifdef SO_TIMESTAMP
|
|
if (cmsg != NULL &&
|
|
cmsg->cmsg_level == SOL_SOCKET &&
|
|
cmsg->cmsg_type == SCM_TIMESTAMP &&
|
|
cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
|
|
/* Copy to avoid alignment problems: */
|
|
memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
|
|
tv = &now;
|
|
}
|
|
#endif
|
|
if (tv == NULL) {
|
|
(void)clock_gettime(CLOCK_MONOTONIC, &now);
|
|
tv = &now;
|
|
}
|
|
pr_pack((char *)packet, cc, &from, tv);
|
|
if ((options & F_ONCE && nreceived) ||
|
|
(npackets && nreceived >= npackets))
|
|
break;
|
|
}
|
|
if (n == 0 || options & F_FLOOD) {
|
|
if (sweepmax && sntransmitted == snpackets) {
|
|
for (i = 0; i < sweepincr ; ++i)
|
|
*datap++ = i;
|
|
datalen += sweepincr;
|
|
if (datalen > sweepmax)
|
|
break;
|
|
send_len = icmp_len + datalen;
|
|
sntransmitted = 0;
|
|
}
|
|
if (!npackets || ntransmitted < npackets)
|
|
pinger();
|
|
else {
|
|
if (almost_done)
|
|
break;
|
|
almost_done = 1;
|
|
intvl.tv_nsec = 0;
|
|
if (nreceived) {
|
|
intvl.tv_sec = 2 * tmax / 1000;
|
|
if (!intvl.tv_sec)
|
|
intvl.tv_sec = 1;
|
|
} else {
|
|
intvl.tv_sec = waittime / 1000;
|
|
intvl.tv_nsec = waittime % 1000 * 1000000;
|
|
}
|
|
}
|
|
(void)clock_gettime(CLOCK_MONOTONIC, &last);
|
|
if (ntransmitted - nreceived - 1 > nmissedmax) {
|
|
nmissedmax = ntransmitted - nreceived - 1;
|
|
if (options & F_MISSED)
|
|
(void)write(STDOUT_FILENO, &BBELL, 1);
|
|
}
|
|
}
|
|
}
|
|
finish();
|
|
/* NOTREACHED */
|
|
exit(0); /* Make the compiler happy */
|
|
}
|
|
|
|
/*
|
|
* stopit --
|
|
* Set the global bit that causes the main loop to quit.
|
|
* Do NOT call finish() from here, since finish() does far too much
|
|
* to be called from a signal handler.
|
|
*/
|
|
void
|
|
stopit(int sig __unused)
|
|
{
|
|
|
|
/*
|
|
* When doing reverse DNS lookups, the finish_up flag might not
|
|
* be noticed for a while. Just exit if we get a second SIGINT.
|
|
*/
|
|
if (!(options & F_NUMERIC) && finish_up)
|
|
_exit(nreceived ? 0 : 2);
|
|
finish_up = 1;
|
|
}
|
|
|
|
/*
|
|
* pinger --
|
|
* Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
|
|
* will be added on by the kernel. The ID field is our UNIX process ID,
|
|
* and the sequence number is an ascending integer. The first TIMEVAL_LEN
|
|
* bytes of the data portion are used to hold a UNIX "timespec" struct in
|
|
* host byte-order, to compute the round-trip time.
|
|
*/
|
|
static void
|
|
pinger(void)
|
|
{
|
|
struct timespec now;
|
|
struct tv32 tv32;
|
|
struct icmp icp;
|
|
int cc, i;
|
|
u_char *packet;
|
|
|
|
packet = outpack;
|
|
memcpy(&icp, outpack, ICMP_MINLEN + phdr_len);
|
|
icp.icmp_type = icmp_type;
|
|
icp.icmp_code = 0;
|
|
icp.icmp_cksum = 0;
|
|
icp.icmp_seq = htons(ntransmitted);
|
|
icp.icmp_id = ident; /* ID */
|
|
|
|
CLR(ntransmitted % mx_dup_ck);
|
|
|
|
if ((options & F_TIME) || timing) {
|
|
(void)clock_gettime(CLOCK_MONOTONIC, &now);
|
|
/*
|
|
* Truncate seconds down to 32 bits in order
|
|
* to fit the timestamp within 8 bytes of the
|
|
* packet. We're only concerned with
|
|
* durations, not absolute times.
|
|
*/
|
|
tv32.tv32_sec = (uint32_t)htonl(now.tv_sec);
|
|
tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec);
|
|
if (options & F_TIME)
|
|
icp.icmp_otime = htonl((now.tv_sec % (24*60*60))
|
|
* 1000 + now.tv_nsec / 1000000);
|
|
if (timing)
|
|
bcopy((void *)&tv32,
|
|
(void *)&outpack[ICMP_MINLEN + phdr_len],
|
|
sizeof(tv32));
|
|
}
|
|
|
|
memcpy(outpack, &icp, ICMP_MINLEN + phdr_len);
|
|
|
|
cc = ICMP_MINLEN + phdr_len + datalen;
|
|
|
|
/* compute ICMP checksum here */
|
|
icp.icmp_cksum = in_cksum(outpack, cc);
|
|
/* Update icmp_cksum in the raw packet data buffer. */
|
|
memcpy(outpack + offsetof(struct icmp, icmp_cksum), &icp.icmp_cksum,
|
|
sizeof(icp.icmp_cksum));
|
|
|
|
if (options & F_HDRINCL) {
|
|
struct ip ip;
|
|
|
|
cc += sizeof(struct ip);
|
|
ip.ip_len = htons(cc);
|
|
/* Update ip_len in the raw packet data buffer. */
|
|
memcpy(outpackhdr + offsetof(struct ip, ip_len), &ip.ip_len,
|
|
sizeof(ip.ip_len));
|
|
ip.ip_sum = in_cksum(outpackhdr, cc);
|
|
/* Update ip_sum in the raw packet data buffer. */
|
|
memcpy(outpackhdr + offsetof(struct ip, ip_sum), &ip.ip_sum,
|
|
sizeof(ip.ip_sum));
|
|
packet = outpackhdr;
|
|
}
|
|
i = send(ssend, (char *)packet, cc, 0);
|
|
if (i < 0 || i != cc) {
|
|
if (i < 0) {
|
|
if (options & F_FLOOD && errno == ENOBUFS) {
|
|
usleep(FLOOD_BACKOFF);
|
|
return;
|
|
}
|
|
warn("sendto");
|
|
} else {
|
|
warn("%s: partial write: %d of %d bytes",
|
|
hostname, i, cc);
|
|
}
|
|
}
|
|
ntransmitted++;
|
|
sntransmitted++;
|
|
if (!(options & F_QUIET) && options & F_FLOOD)
|
|
(void)write(STDOUT_FILENO, &DOT, 1);
|
|
}
|
|
|
|
/*
|
|
* pr_pack --
|
|
* Print out the packet, if it came from us. This logic is necessary
|
|
* because ALL readers of the ICMP socket get a copy of ALL ICMP packets
|
|
* which arrive ('tis only fair). This permits multiple copies of this
|
|
* program to be run without having intermingled output (or statistics!).
|
|
*/
|
|
static void
|
|
pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv)
|
|
{
|
|
struct in_addr ina;
|
|
u_char *cp, *dp, l;
|
|
struct icmp icp;
|
|
struct ip ip;
|
|
const u_char *icmp_data_raw;
|
|
double triptime;
|
|
int dupflag, hlen, i, j, recv_len;
|
|
uint16_t seq;
|
|
static int old_rrlen;
|
|
static char old_rr[MAX_IPOPTLEN];
|
|
struct ip oip;
|
|
u_char oip_header_len;
|
|
struct icmp oicmp;
|
|
const u_char *oicmp_raw;
|
|
|
|
/*
|
|
* Get size of IP header of the received packet. The
|
|
* information is contained in the lower four bits of the
|
|
* first byte.
|
|
*/
|
|
memcpy(&l, buf, sizeof(l));
|
|
hlen = (l & 0x0f) << 2;
|
|
memcpy(&ip, buf, hlen);
|
|
|
|
/* Check the IP header */
|
|
recv_len = cc;
|
|
if (cc < hlen + ICMP_MINLEN) {
|
|
if (options & F_VERBOSE)
|
|
warn("packet too short (%zd bytes) from %s", cc,
|
|
inet_ntoa(from->sin_addr));
|
|
return;
|
|
}
|
|
|
|
#ifndef icmp_data
|
|
icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_ip);
|
|
#else
|
|
icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_data);
|
|
#endif
|
|
|
|
/* Now the ICMP part */
|
|
cc -= hlen;
|
|
memcpy(&icp, buf + hlen, MIN((ssize_t)sizeof(icp), cc));
|
|
if (icp.icmp_type == icmp_type_rsp) {
|
|
if (icp.icmp_id != ident)
|
|
return; /* 'Twas not our ECHO */
|
|
++nreceived;
|
|
triptime = 0.0;
|
|
if (timing) {
|
|
struct timespec tv1;
|
|
struct tv32 tv32;
|
|
const u_char *tp;
|
|
|
|
tp = icmp_data_raw + phdr_len;
|
|
|
|
if ((size_t)(cc - ICMP_MINLEN - phdr_len) >=
|
|
sizeof(tv1)) {
|
|
/* Copy to avoid alignment problems: */
|
|
memcpy(&tv32, tp, sizeof(tv32));
|
|
tv1.tv_sec = ntohl(tv32.tv32_sec);
|
|
tv1.tv_nsec = ntohl(tv32.tv32_nsec);
|
|
timespecsub(tv, &tv1, tv);
|
|
triptime = ((double)tv->tv_sec) * 1000.0 +
|
|
((double)tv->tv_nsec) / 1000000.0;
|
|
tsum += triptime;
|
|
tsumsq += triptime * triptime;
|
|
if (triptime < tmin)
|
|
tmin = triptime;
|
|
if (triptime > tmax)
|
|
tmax = triptime;
|
|
} else
|
|
timing = 0;
|
|
}
|
|
|
|
seq = ntohs(icp.icmp_seq);
|
|
|
|
if (TST(seq % mx_dup_ck)) {
|
|
++nrepeats;
|
|
--nreceived;
|
|
dupflag = 1;
|
|
} else {
|
|
SET(seq % mx_dup_ck);
|
|
dupflag = 0;
|
|
}
|
|
|
|
if (options & F_QUIET)
|
|
return;
|
|
|
|
if (options & F_WAITTIME && triptime > waittime) {
|
|
++nrcvtimeout;
|
|
return;
|
|
}
|
|
|
|
if (options & F_FLOOD)
|
|
(void)write(STDOUT_FILENO, &BSPACE, 1);
|
|
else {
|
|
(void)printf("%zd bytes from %s: icmp_seq=%u", cc,
|
|
pr_addr(from->sin_addr), seq);
|
|
(void)printf(" ttl=%d", ip.ip_ttl);
|
|
if (timing)
|
|
(void)printf(" time=%.3f ms", triptime);
|
|
if (dupflag)
|
|
(void)printf(" (DUP!)");
|
|
if (options & F_AUDIBLE)
|
|
(void)write(STDOUT_FILENO, &BBELL, 1);
|
|
if (options & F_MASK) {
|
|
/* Just prentend this cast isn't ugly */
|
|
(void)printf(" mask=%s",
|
|
inet_ntoa(*(struct in_addr *)&(icp.icmp_mask)));
|
|
}
|
|
if (options & F_TIME) {
|
|
(void)printf(" tso=%s", pr_ntime(icp.icmp_otime));
|
|
(void)printf(" tsr=%s", pr_ntime(icp.icmp_rtime));
|
|
(void)printf(" tst=%s", pr_ntime(icp.icmp_ttime));
|
|
}
|
|
if (recv_len != send_len) {
|
|
(void)printf(
|
|
"\nwrong total length %d instead of %d",
|
|
recv_len, send_len);
|
|
}
|
|
/* check the data */
|
|
cp = (u_char*)(buf + hlen + offsetof(struct icmp,
|
|
icmp_data) + phdr_len);
|
|
dp = &outpack[ICMP_MINLEN + phdr_len];
|
|
cc -= ICMP_MINLEN + phdr_len;
|
|
i = 0;
|
|
if (timing) { /* don't check variable timestamp */
|
|
cp += TIMEVAL_LEN;
|
|
dp += TIMEVAL_LEN;
|
|
cc -= TIMEVAL_LEN;
|
|
i += TIMEVAL_LEN;
|
|
}
|
|
for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
|
|
if (*cp != *dp) {
|
|
(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
|
|
i, *dp, *cp);
|
|
(void)printf("\ncp:");
|
|
cp = (u_char*)(buf + hlen +
|
|
offsetof(struct icmp, icmp_data));
|
|
for (i = 0; i < datalen; ++i, ++cp) {
|
|
if ((i % 16) == 8)
|
|
(void)printf("\n\t");
|
|
(void)printf("%2x ", *cp);
|
|
}
|
|
(void)printf("\ndp:");
|
|
cp = &outpack[ICMP_MINLEN];
|
|
for (i = 0; i < datalen; ++i, ++cp) {
|
|
if ((i % 16) == 8)
|
|
(void)printf("\n\t");
|
|
(void)printf("%2x ", *cp);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* We've got something other than an ECHOREPLY.
|
|
* See if it's a reply to something that we sent.
|
|
* We can compare IP destination, protocol,
|
|
* and ICMP type and ID.
|
|
*
|
|
* Only print all the error messages if we are running
|
|
* as root to avoid leaking information not normally
|
|
* available to those not running as root.
|
|
*/
|
|
memcpy(&oip_header_len, icmp_data_raw, sizeof(oip_header_len));
|
|
oip_header_len = (oip_header_len & 0x0f) << 2;
|
|
memcpy(&oip, icmp_data_raw, oip_header_len);
|
|
oicmp_raw = icmp_data_raw + oip_header_len;
|
|
memcpy(&oicmp, oicmp_raw, offsetof(struct icmp, icmp_id) +
|
|
sizeof(oicmp.icmp_id));
|
|
|
|
if (((options & F_VERBOSE) && uid == 0) ||
|
|
(!(options & F_QUIET2) &&
|
|
(oip.ip_dst.s_addr == whereto.sin_addr.s_addr) &&
|
|
(oip.ip_p == IPPROTO_ICMP) &&
|
|
(oicmp.icmp_type == ICMP_ECHO) &&
|
|
(oicmp.icmp_id == ident))) {
|
|
(void)printf("%zd bytes from %s: ", cc,
|
|
pr_addr(from->sin_addr));
|
|
pr_icmph(&icp, &oip, oicmp_raw);
|
|
} else
|
|
return;
|
|
}
|
|
|
|
/* Display any IP options */
|
|
cp = (u_char *)buf + sizeof(struct ip);
|
|
|
|
for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
|
|
switch (*cp) {
|
|
case IPOPT_EOL:
|
|
hlen = 0;
|
|
break;
|
|
case IPOPT_LSRR:
|
|
case IPOPT_SSRR:
|
|
(void)printf(*cp == IPOPT_LSRR ?
|
|
"\nLSRR: " : "\nSSRR: ");
|
|
j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
|
|
hlen -= 2;
|
|
cp += 2;
|
|
if (j >= INADDR_LEN &&
|
|
j <= hlen - (int)sizeof(struct ip)) {
|
|
for (;;) {
|
|
bcopy(++cp, &ina.s_addr, INADDR_LEN);
|
|
if (ina.s_addr == 0)
|
|
(void)printf("\t0.0.0.0");
|
|
else
|
|
(void)printf("\t%s",
|
|
pr_addr(ina));
|
|
hlen -= INADDR_LEN;
|
|
cp += INADDR_LEN - 1;
|
|
j -= INADDR_LEN;
|
|
if (j < INADDR_LEN)
|
|
break;
|
|
(void)putchar('\n');
|
|
}
|
|
} else
|
|
(void)printf("\t(truncated route)\n");
|
|
break;
|
|
case IPOPT_RR:
|
|
j = cp[IPOPT_OLEN]; /* get length */
|
|
i = cp[IPOPT_OFFSET]; /* and pointer */
|
|
hlen -= 2;
|
|
cp += 2;
|
|
if (i > j)
|
|
i = j;
|
|
i = i - IPOPT_MINOFF + 1;
|
|
if (i < 0 || i > (hlen - (int)sizeof(struct ip))) {
|
|
old_rrlen = 0;
|
|
continue;
|
|
}
|
|
if (i == old_rrlen
|
|
&& !bcmp((char *)cp, old_rr, i)
|
|
&& !(options & F_FLOOD)) {
|
|
(void)printf("\t(same route)");
|
|
hlen -= i;
|
|
cp += i;
|
|
break;
|
|
}
|
|
old_rrlen = i;
|
|
bcopy((char *)cp, old_rr, i);
|
|
(void)printf("\nRR: ");
|
|
if (i >= INADDR_LEN &&
|
|
i <= hlen - (int)sizeof(struct ip)) {
|
|
for (;;) {
|
|
bcopy(++cp, &ina.s_addr, INADDR_LEN);
|
|
if (ina.s_addr == 0)
|
|
(void)printf("\t0.0.0.0");
|
|
else
|
|
(void)printf("\t%s",
|
|
pr_addr(ina));
|
|
hlen -= INADDR_LEN;
|
|
cp += INADDR_LEN - 1;
|
|
i -= INADDR_LEN;
|
|
if (i < INADDR_LEN)
|
|
break;
|
|
(void)putchar('\n');
|
|
}
|
|
} else
|
|
(void)printf("\t(truncated route)");
|
|
break;
|
|
case IPOPT_NOP:
|
|
(void)printf("\nNOP");
|
|
break;
|
|
default:
|
|
(void)printf("\nunknown option %x", *cp);
|
|
break;
|
|
}
|
|
if (!(options & F_FLOOD)) {
|
|
(void)putchar('\n');
|
|
(void)fflush(stdout);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* status --
|
|
* Print out statistics when SIGINFO is received.
|
|
*/
|
|
|
|
static void
|
|
status(int sig __unused)
|
|
{
|
|
|
|
siginfo_p = 1;
|
|
}
|
|
|
|
static void
|
|
check_status(void)
|
|
{
|
|
|
|
if (siginfo_p) {
|
|
siginfo_p = 0;
|
|
(void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)",
|
|
nreceived, ntransmitted,
|
|
ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0);
|
|
if (nreceived && timing)
|
|
(void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max",
|
|
tmin, tsum / (nreceived + nrepeats), tmax);
|
|
(void)fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* finish --
|
|
* Print out statistics, and give up.
|
|
*/
|
|
static void
|
|
finish(void)
|
|
{
|
|
|
|
(void)signal(SIGINT, SIG_IGN);
|
|
(void)signal(SIGALRM, SIG_IGN);
|
|
(void)putchar('\n');
|
|
(void)fflush(stdout);
|
|
(void)printf("--- %s ping statistics ---\n", hostname);
|
|
(void)printf("%ld packets transmitted, ", ntransmitted);
|
|
(void)printf("%ld packets received, ", nreceived);
|
|
if (nrepeats)
|
|
(void)printf("+%ld duplicates, ", nrepeats);
|
|
if (ntransmitted) {
|
|
if (nreceived > ntransmitted)
|
|
(void)printf("-- somebody's printing up packets!");
|
|
else
|
|
(void)printf("%.1f%% packet loss",
|
|
((ntransmitted - nreceived) * 100.0) /
|
|
ntransmitted);
|
|
}
|
|
if (nrcvtimeout)
|
|
(void)printf(", %ld packets out of wait time", nrcvtimeout);
|
|
(void)putchar('\n');
|
|
if (nreceived && timing) {
|
|
double n = nreceived + nrepeats;
|
|
double avg = tsum / n;
|
|
double vari = tsumsq / n - avg * avg;
|
|
(void)printf(
|
|
"round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
|
|
tmin, avg, tmax, sqrt(vari));
|
|
}
|
|
|
|
if (nreceived)
|
|
exit(0);
|
|
else
|
|
exit(2);
|
|
}
|
|
|
|
#ifdef notdef
|
|
static char *ttab[] = {
|
|
"Echo Reply", /* ip + seq + udata */
|
|
"Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
|
|
"Source Quench", /* IP */
|
|
"Redirect", /* redirect type, gateway, + IP */
|
|
"Echo",
|
|
"Time Exceeded", /* transit, frag reassem + IP */
|
|
"Parameter Problem", /* pointer + IP */
|
|
"Timestamp", /* id + seq + three timestamps */
|
|
"Timestamp Reply", /* " */
|
|
"Info Request", /* id + sq */
|
|
"Info Reply" /* " */
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* pr_icmph --
|
|
* Print a descriptive string about an ICMP header.
|
|
*/
|
|
static void
|
|
pr_icmph(struct icmp *icp, struct ip *oip, const u_char *const oicmp_raw)
|
|
{
|
|
|
|
switch(icp->icmp_type) {
|
|
case ICMP_ECHOREPLY:
|
|
(void)printf("Echo Reply\n");
|
|
/* XXX ID + Seq + Data */
|
|
break;
|
|
case ICMP_UNREACH:
|
|
switch(icp->icmp_code) {
|
|
case ICMP_UNREACH_NET:
|
|
(void)printf("Destination Net Unreachable\n");
|
|
break;
|
|
case ICMP_UNREACH_HOST:
|
|
(void)printf("Destination Host Unreachable\n");
|
|
break;
|
|
case ICMP_UNREACH_PROTOCOL:
|
|
(void)printf("Destination Protocol Unreachable\n");
|
|
break;
|
|
case ICMP_UNREACH_PORT:
|
|
(void)printf("Destination Port Unreachable\n");
|
|
break;
|
|
case ICMP_UNREACH_NEEDFRAG:
|
|
(void)printf("frag needed and DF set (MTU %d)\n",
|
|
ntohs(icp->icmp_nextmtu));
|
|
break;
|
|
case ICMP_UNREACH_SRCFAIL:
|
|
(void)printf("Source Route Failed\n");
|
|
break;
|
|
case ICMP_UNREACH_FILTER_PROHIB:
|
|
(void)printf("Communication prohibited by filter\n");
|
|
break;
|
|
default:
|
|
(void)printf("Dest Unreachable, Bad Code: %d\n",
|
|
icp->icmp_code);
|
|
break;
|
|
}
|
|
/* Print returned IP header information */
|
|
pr_retip(oip, oicmp_raw);
|
|
break;
|
|
case ICMP_SOURCEQUENCH:
|
|
(void)printf("Source Quench\n");
|
|
pr_retip(oip, oicmp_raw);
|
|
break;
|
|
case ICMP_REDIRECT:
|
|
switch(icp->icmp_code) {
|
|
case ICMP_REDIRECT_NET:
|
|
(void)printf("Redirect Network");
|
|
break;
|
|
case ICMP_REDIRECT_HOST:
|
|
(void)printf("Redirect Host");
|
|
break;
|
|
case ICMP_REDIRECT_TOSNET:
|
|
(void)printf("Redirect Type of Service and Network");
|
|
break;
|
|
case ICMP_REDIRECT_TOSHOST:
|
|
(void)printf("Redirect Type of Service and Host");
|
|
break;
|
|
default:
|
|
(void)printf("Redirect, Bad Code: %d", icp->icmp_code);
|
|
break;
|
|
}
|
|
(void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
|
|
pr_retip(oip, oicmp_raw);
|
|
break;
|
|
case ICMP_ECHO:
|
|
(void)printf("Echo Request\n");
|
|
/* XXX ID + Seq + Data */
|
|
break;
|
|
case ICMP_TIMXCEED:
|
|
switch(icp->icmp_code) {
|
|
case ICMP_TIMXCEED_INTRANS:
|
|
(void)printf("Time to live exceeded\n");
|
|
break;
|
|
case ICMP_TIMXCEED_REASS:
|
|
(void)printf("Frag reassembly time exceeded\n");
|
|
break;
|
|
default:
|
|
(void)printf("Time exceeded, Bad Code: %d\n",
|
|
icp->icmp_code);
|
|
break;
|
|
}
|
|
pr_retip(oip, oicmp_raw);
|
|
break;
|
|
case ICMP_PARAMPROB:
|
|
(void)printf("Parameter problem: pointer = 0x%02x\n",
|
|
icp->icmp_hun.ih_pptr);
|
|
pr_retip(oip, oicmp_raw);
|
|
break;
|
|
case ICMP_TSTAMP:
|
|
(void)printf("Timestamp\n");
|
|
/* XXX ID + Seq + 3 timestamps */
|
|
break;
|
|
case ICMP_TSTAMPREPLY:
|
|
(void)printf("Timestamp Reply\n");
|
|
/* XXX ID + Seq + 3 timestamps */
|
|
break;
|
|
case ICMP_IREQ:
|
|
(void)printf("Information Request\n");
|
|
/* XXX ID + Seq */
|
|
break;
|
|
case ICMP_IREQREPLY:
|
|
(void)printf("Information Reply\n");
|
|
/* XXX ID + Seq */
|
|
break;
|
|
case ICMP_MASKREQ:
|
|
(void)printf("Address Mask Request\n");
|
|
break;
|
|
case ICMP_MASKREPLY:
|
|
(void)printf("Address Mask Reply\n");
|
|
break;
|
|
case ICMP_ROUTERADVERT:
|
|
(void)printf("Router Advertisement\n");
|
|
break;
|
|
case ICMP_ROUTERSOLICIT:
|
|
(void)printf("Router Solicitation\n");
|
|
break;
|
|
default:
|
|
(void)printf("Bad ICMP type: %d\n", icp->icmp_type);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* pr_iph --
|
|
* Print an IP header with options.
|
|
*/
|
|
static void
|
|
pr_iph(struct ip *ip)
|
|
{
|
|
struct in_addr ina;
|
|
u_char *cp;
|
|
int hlen;
|
|
|
|
hlen = ip->ip_hl << 2;
|
|
cp = (u_char *)ip + 20; /* point to options */
|
|
|
|
(void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n");
|
|
(void)printf(" %1x %1x %02x %04x %04x",
|
|
ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
|
|
ntohs(ip->ip_id));
|
|
(void)printf(" %1lx %04lx",
|
|
(u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
|
|
(u_long) ntohl(ip->ip_off) & 0x1fff);
|
|
(void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p,
|
|
ntohs(ip->ip_sum));
|
|
memcpy(&ina, &ip->ip_src.s_addr, sizeof ina);
|
|
(void)printf(" %s ", inet_ntoa(ina));
|
|
memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina);
|
|
(void)printf(" %s ", inet_ntoa(ina));
|
|
/* dump any option bytes */
|
|
while (hlen-- > 20) {
|
|
(void)printf("%02x", *cp++);
|
|
}
|
|
(void)putchar('\n');
|
|
}
|
|
|
|
/*
|
|
* pr_addr --
|
|
* Return an ascii host address as a dotted quad and optionally with
|
|
* a hostname.
|
|
*/
|
|
static char *
|
|
pr_addr(struct in_addr ina)
|
|
{
|
|
struct hostent *hp;
|
|
static char buf[16 + 3 + MAXHOSTNAMELEN];
|
|
|
|
if (options & F_NUMERIC)
|
|
return inet_ntoa(ina);
|
|
|
|
hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET);
|
|
|
|
if (hp == NULL)
|
|
return inet_ntoa(ina);
|
|
|
|
(void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
|
|
inet_ntoa(ina));
|
|
return(buf);
|
|
}
|
|
|
|
/*
|
|
* pr_retip --
|
|
* Dump some info on a returned (via ICMP) IP packet.
|
|
*/
|
|
static void
|
|
pr_retip(struct ip *ip, const u_char *cp)
|
|
{
|
|
pr_iph(ip);
|
|
|
|
if (ip->ip_p == 6)
|
|
(void)printf("TCP: from port %u, to port %u (decimal)\n",
|
|
(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
|
|
else if (ip->ip_p == 17)
|
|
(void)printf("UDP: from port %u, to port %u (decimal)\n",
|
|
(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
|
|
}
|
|
|
|
static char *
|
|
pr_ntime(n_time timestamp)
|
|
{
|
|
static char buf[11];
|
|
int hour, min, sec;
|
|
|
|
sec = ntohl(timestamp) / 1000;
|
|
hour = sec / 60 / 60;
|
|
min = (sec % (60 * 60)) / 60;
|
|
sec = (sec % (60 * 60)) % 60;
|
|
|
|
(void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
|
|
|
|
return (buf);
|
|
}
|
|
|
|
static void
|
|
fill(char *bp, char *patp)
|
|
{
|
|
char *cp;
|
|
int pat[16];
|
|
u_int ii, jj, kk;
|
|
|
|
for (cp = patp; *cp; cp++) {
|
|
if (!isxdigit(*cp))
|
|
errx(EX_USAGE,
|
|
"patterns must be specified as hex digits");
|
|
|
|
}
|
|
ii = sscanf(patp,
|
|
"%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
|
|
&pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
|
|
&pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
|
|
&pat[13], &pat[14], &pat[15]);
|
|
|
|
if (ii > 0)
|
|
for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
|
|
for (jj = 0; jj < ii; ++jj)
|
|
bp[jj + kk] = pat[jj];
|
|
if (!(options & F_QUIET)) {
|
|
(void)printf("PATTERN: 0x");
|
|
for (jj = 0; jj < ii; ++jj)
|
|
(void)printf("%02x", bp[jj] & 0xFF);
|
|
(void)printf("\n");
|
|
}
|
|
}
|
|
|
|
static cap_channel_t *
|
|
capdns_setup(void)
|
|
{
|
|
cap_channel_t *capcas, *capdnsloc;
|
|
#ifdef WITH_CASPER
|
|
const char *types[2];
|
|
int families[1];
|
|
#endif
|
|
capcas = cap_init();
|
|
if (capcas == NULL)
|
|
err(1, "unable to create casper process");
|
|
capdnsloc = cap_service_open(capcas, "system.dns");
|
|
/* Casper capability no longer needed. */
|
|
cap_close(capcas);
|
|
if (capdnsloc == NULL)
|
|
err(1, "unable to open system.dns service");
|
|
#ifdef WITH_CASPER
|
|
types[0] = "NAME2ADDR";
|
|
types[1] = "ADDR2NAME";
|
|
if (cap_dns_type_limit(capdnsloc, types, 2) < 0)
|
|
err(1, "unable to limit access to system.dns service");
|
|
families[0] = AF_INET;
|
|
if (cap_dns_family_limit(capdnsloc, families, 1) < 0)
|
|
err(1, "unable to limit access to system.dns service");
|
|
#endif
|
|
return (capdnsloc);
|
|
}
|
|
|
|
#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
|
|
#define SECOPT " [-P policy]"
|
|
#else
|
|
#define SECOPT ""
|
|
#endif
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
|
|
"usage: ping [-AaDdfHnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]",
|
|
" [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]",
|
|
" " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]",
|
|
" [-W waittime] [-z tos] host",
|
|
" ping [-AaDdfHLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
|
|
" [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
|
|
" [-s packetsize] [-T ttl] [-t timeout] [-W waittime]",
|
|
" [-z tos] mcast-group");
|
|
exit(EX_USAGE);
|
|
}
|