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![Dag-Erling Smørgrav](/assets/img/avatar_default.png)
A missing else caused the correct resolver hint (AF_INET) to be overwritten with AF_UNSPEC when the kernel supports IPv4 but not IPv6. MFC after: 3 days PR: 277592 Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Reviewed by: allanjude Differential Revision: https://reviews.freebsd.org/D44304
301 lines
7.5 KiB
C
301 lines
7.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (C) 2019 Jan Sucan <jansucan@FreeBSD.org>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <math.h>
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#include <signal.h>
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#include <stdbool.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 <unistd.h>
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#include "main.h"
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#ifdef INET
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#include "ping.h"
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#endif
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#ifdef INET6
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#include "ping6.h"
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#endif
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#if defined(INET) && defined(INET6)
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#define OPTSTR PING6OPTS PING4OPTS
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#elif defined(INET)
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#define OPTSTR PING4OPTS
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#elif defined(INET6)
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#define OPTSTR PING6OPTS
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#else
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#error At least one of INET and INET6 is required
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#endif
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/* various options */
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u_int options;
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char *hostname;
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/* counters */
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long nreceived; /* # of packets we got back */
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long nrepeats; /* number of duplicates */
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long ntransmitted; /* sequence # for outbound packets = #sent */
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long nrcvtimeout = 0; /* # of packets we got back after waittime */
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/* nonzero if we've been told to finish up */
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volatile sig_atomic_t seenint;
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volatile sig_atomic_t seeninfo;
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/* timing */
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int timing; /* flag to do timing */
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double tmin = 999999999.0; /* minimum round trip time */
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double tmax = 0.0; /* maximum round trip time */
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double tsum = 0.0; /* sum of all times, for doing average */
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double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
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int
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main(int argc, char *argv[])
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{
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#if defined(INET)
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struct in_addr a;
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#endif
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#if defined(INET6)
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struct in6_addr a6;
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#endif
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#if defined(INET) && defined(INET6)
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struct addrinfo hints, *res, *ai;
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const char *target;
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int error;
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#endif
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int opt;
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#ifdef INET6
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if (strcmp(getprogname(), "ping6") == 0)
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return ping6(argc, argv);
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#endif
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while ((opt = getopt(argc, argv, ":" OPTSTR)) != -1) {
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switch (opt) {
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#ifdef INET
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case '4':
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goto ping4;
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#endif
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#ifdef INET6
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case '6':
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goto ping6;
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#endif
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case 'S':
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/*
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* If -S is given with a numeric parameter,
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* force use of the corresponding version.
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*/
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#ifdef INET
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if (inet_pton(AF_INET, optarg, &a) == 1)
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goto ping4;
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#endif
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#ifdef INET6
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if (inet_pton(AF_INET6, optarg, &a6) == 1)
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goto ping6;
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#endif
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break;
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default:
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break;
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}
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}
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/*
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* For IPv4, only one positional argument, the target, is allowed.
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* For IPv6, multiple positional argument are allowed; the last
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* one is the target, and preceding ones are intermediate hops.
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* This nuance is lost here, but the only case where it matters is
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* an error.
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*/
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if (optind >= argc)
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usage();
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#if defined(INET) && defined(INET6)
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target = argv[argc - 1];
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memset(&hints, 0, sizeof(hints));
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hints.ai_socktype = SOCK_RAW;
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if (feature_present("inet") && !feature_present("inet6"))
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hints.ai_family = AF_INET;
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else if (feature_present("inet6") && !feature_present("inet"))
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hints.ai_family = AF_INET6;
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else
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hints.ai_family = AF_UNSPEC;
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error = getaddrinfo(target, NULL, &hints, &res);
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if (res == NULL)
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errx(EX_NOHOST, "cannot resolve %s: %s",
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target, gai_strerror(error));
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for (ai = res; ai != NULL; ai = ai->ai_next) {
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if (ai->ai_family == AF_INET) {
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freeaddrinfo(res);
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goto ping4;
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}
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if (ai->ai_family == AF_INET6) {
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freeaddrinfo(res);
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goto ping6;
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}
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}
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freeaddrinfo(res);
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errx(EX_NOHOST, "cannot resolve %s", target);
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#endif
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#ifdef INET
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ping4:
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optreset = 1;
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optind = 1;
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return ping(argc, argv);
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#endif
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#ifdef INET6
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ping6:
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optreset = 1;
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optind = 1;
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return ping6(argc, argv);
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#endif
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}
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/*
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* onsignal --
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* Set the global bit that causes the main loop to quit.
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*/
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void
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onsignal(int sig)
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{
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switch (sig) {
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case SIGALRM:
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case SIGINT:
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/*
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* When doing reverse DNS lookups, the seenint flag might not
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* be noticed for a while. Just exit if we get a second SIGINT.
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*/
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if (!(options & F_HOSTNAME) && seenint != 0)
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_exit(nreceived ? 0 : 2);
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seenint++;
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break;
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case SIGINFO:
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seeninfo++;
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break;
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}
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}
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/*
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* pr_summary --
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* Print out summary statistics to the given output stream.
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*/
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void
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pr_summary(FILE * restrict stream)
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{
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fprintf(stream, "\n--- %s ping statistics ---\n", hostname);
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fprintf(stream, "%ld packets transmitted, ", ntransmitted);
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fprintf(stream, "%ld packets received, ", nreceived);
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if (nrepeats)
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fprintf(stream, "+%ld duplicates, ", nrepeats);
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if (ntransmitted) {
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if (nreceived > ntransmitted)
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fprintf(stream, "-- somebody's duplicating packets!");
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else
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fprintf(stream, "%.1f%% packet loss",
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((((double)ntransmitted - nreceived) * 100.0) /
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ntransmitted));
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}
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if (nrcvtimeout)
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fprintf(stream, ", %ld packets out of wait time", nrcvtimeout);
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fputc('\n', stream);
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if (nreceived && timing) {
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/* Only display average to microseconds */
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double num = nreceived + nrepeats;
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double avg = tsum / num;
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double stddev = sqrt(fmax(0, tsumsq / num - avg * avg));
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fprintf(stream,
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"round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
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tmin, avg, tmax, stddev);
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}
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fflush(stream);
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}
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void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage:\n"
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#ifdef INET
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"\tping [-4AaDdfHnoQqRrv] [-C pcp] [-c count] "
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"[-G sweepmaxsize]\n"
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"\t [-g sweepminsize] [-h sweepincrsize] [-i wait] "
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"[-l preload]\n"
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"\t [-M mask | time] [-m ttl] "
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#ifdef IPSEC
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"[-P policy] "
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#endif
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"[-p pattern] [-S src_addr] \n"
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"\t [-s packetsize] [-t timeout] [-W waittime] [-z tos] "
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"IPv4-host\n"
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"\tping [-4AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] "
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"[-i wait]\n"
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"\t [-l preload] [-M mask | time] [-m ttl] "
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#ifdef IPSEC
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"[-P policy] "
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#endif
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"[-p pattern]\n"
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"\t [-S src_addr] [-s packetsize] [-T ttl] [-t timeout] [-W waittime]\n"
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"\t [-z tos] IPv4-mcast-group\n"
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#endif /* INET */
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#ifdef INET6
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"\tping [-6AaDd"
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#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
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"E"
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#endif
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"fHnNoOq"
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#ifdef IPV6_USE_MIN_MTU
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"u"
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#endif
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"vyY"
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#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
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"Z"
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#endif
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"] "
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"[-b bufsiz] [-C pcp] [-c count] [-e gateway]\n"
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"\t [-I interface] [-i wait] [-k addrtype] [-l preload] "
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"[-m hoplimit]\n"
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"\t [-p pattern]"
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#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
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" [-P policy]"
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#endif
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" [-S sourceaddr] [-s packetsize] [-t timeout]\n"
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"\t [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n"
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#endif /* INET6 */
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);
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exit(1);
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}
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