/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (C) 2019 Jan Sucan * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "main.h" #ifdef INET #include "ping.h" #endif #ifdef INET6 #include "ping6.h" #endif #if defined(INET) && defined(INET6) #define OPTSTR PING6OPTS PING4OPTS #elif defined(INET) #define OPTSTR PING4OPTS #elif defined(INET6) #define OPTSTR PING6OPTS #else #error At least one of INET and INET6 is required #endif /* various options */ u_int options; char *hostname; /* counters */ long nreceived; /* # of packets we got back */ long nrepeats; /* number of duplicates */ long ntransmitted; /* sequence # for outbound packets = #sent */ long nrcvtimeout = 0; /* # of packets we got back after waittime */ /* nonzero if we've been told to finish up */ volatile sig_atomic_t seenint; volatile sig_atomic_t seeninfo; /* timing */ int timing; /* flag to do timing */ double tmin = 999999999.0; /* minimum round trip time */ double tmax = 0.0; /* maximum round trip time */ double tsum = 0.0; /* sum of all times, for doing average */ double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ int main(int argc, char *argv[]) { #if defined(INET) struct in_addr a; #endif #if defined(INET6) struct in6_addr a6; #endif #if defined(INET) && defined(INET6) struct addrinfo hints, *res, *ai; const char *target; int error; #endif int opt; #ifdef INET6 if (strcmp(getprogname(), "ping6") == 0) return ping6(argc, argv); #endif while ((opt = getopt(argc, argv, ":" OPTSTR)) != -1) { switch (opt) { #ifdef INET case '4': goto ping4; #endif #ifdef INET6 case '6': goto ping6; #endif case 'S': /* * If -S is given with a numeric parameter, * force use of the corresponding version. */ #ifdef INET if (inet_pton(AF_INET, optarg, &a) == 1) goto ping4; #endif #ifdef INET6 if (inet_pton(AF_INET6, optarg, &a6) == 1) goto ping6; #endif break; default: break; } } /* * For IPv4, only one positional argument, the target, is allowed. * For IPv6, multiple positional argument are allowed; the last * one is the target, and preceding ones are intermediate hops. * This nuance is lost here, but the only case where it matters is * an error. */ if (optind >= argc) usage(); #if defined(INET) && defined(INET6) target = argv[argc - 1]; memset(&hints, 0, sizeof(hints)); hints.ai_socktype = SOCK_RAW; if (feature_present("inet") && !feature_present("inet6")) hints.ai_family = AF_INET; if (feature_present("inet6") && !feature_present("inet")) hints.ai_family = AF_INET6; else hints.ai_family = AF_UNSPEC; error = getaddrinfo(target, NULL, &hints, &res); if (res == NULL) errx(EX_NOHOST, "cannot resolve %s: %s", target, gai_strerror(error)); for (ai = res; ai != NULL; ai = ai->ai_next) { if (ai->ai_family == AF_INET) { freeaddrinfo(res); goto ping4; } if (ai->ai_family == AF_INET6) { freeaddrinfo(res); goto ping6; } } freeaddrinfo(res); errx(EX_NOHOST, "cannot resolve %s", target); #endif #ifdef INET ping4: optreset = 1; optind = 1; return ping(argc, argv); #endif #ifdef INET6 ping6: optreset = 1; optind = 1; return ping6(argc, argv); #endif } /* * onsignal -- * Set the global bit that causes the main loop to quit. */ void onsignal(int sig) { switch (sig) { case SIGALRM: case SIGINT: /* * When doing reverse DNS lookups, the seenint flag might not * be noticed for a while. Just exit if we get a second SIGINT. */ if (!(options & F_HOSTNAME) && seenint != 0) _exit(nreceived ? 0 : 2); seenint++; break; case SIGINFO: seeninfo++; break; } } /* * pr_summary -- * Print out summary statistics to the given output stream. */ void pr_summary(FILE * restrict stream) { fprintf(stream, "\n--- %s ping statistics ---\n", hostname); fprintf(stream, "%ld packets transmitted, ", ntransmitted); fprintf(stream, "%ld packets received, ", nreceived); if (nrepeats) fprintf(stream, "+%ld duplicates, ", nrepeats); if (ntransmitted) { if (nreceived > ntransmitted) fprintf(stream, "-- somebody's duplicating packets!"); else fprintf(stream, "%.1f%% packet loss", ((((double)ntransmitted - nreceived) * 100.0) / ntransmitted)); } if (nrcvtimeout) fprintf(stream, ", %ld packets out of wait time", nrcvtimeout); fputc('\n', stream); if (nreceived && timing) { /* Only display average to microseconds */ double num = nreceived + nrepeats; double avg = tsum / num; double stddev = sqrt(fmax(0, tsumsq / num - avg * avg)); fprintf(stream, "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", tmin, avg, tmax, stddev); } fflush(stream); } void usage(void) { (void)fprintf(stderr, "usage:\n" #ifdef INET "\tping [-4AaDdfHnoQqRrv] [-C pcp] [-c count] " "[-G sweepmaxsize]\n" "\t [-g sweepminsize] [-h sweepincrsize] [-i wait] " "[-l preload]\n" "\t [-M mask | time] [-m ttl] " #ifdef IPSEC "[-P policy] " #endif "[-p pattern] [-S src_addr] \n" "\t [-s packetsize] [-t timeout] [-W waittime] [-z tos] " "IPv4-host\n" "\tping [-4AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] " "[-i wait]\n" "\t [-l preload] [-M mask | time] [-m ttl] " #ifdef IPSEC "[-P policy] " #endif "[-p pattern]\n" "\t [-S src_addr] [-s packetsize] [-T ttl] [-t timeout] [-W waittime]\n" "\t [-z tos] IPv4-mcast-group\n" #endif /* INET */ #ifdef INET6 "\tping [-6AaDd" #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) "E" #endif "fHnNoOq" #ifdef IPV6_USE_MIN_MTU "u" #endif "vyY" #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) "Z" #endif "] " "[-b bufsiz] [-C pcp] [-c count] [-e gateway]\n" "\t [-I interface] [-i wait] [-k addrtype] [-l preload] " "[-m hoplimit]\n" "\t [-p pattern]" #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) " [-P policy]" #endif " [-S sourceaddr] [-s packetsize] [-t timeout]\n" "\t [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n" #endif /* INET6 */ ); exit(1); }