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-rw-r--r--sbin/ping/main.c265
1 files changed, 174 insertions, 91 deletions
diff --git a/sbin/ping/main.c b/sbin/ping/main.c
index 01442679efff..8a572cb3c914 100644
--- a/sbin/ping/main.c
+++ b/sbin/ping/main.c
@@ -1,5 +1,5 @@
/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ * SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (C) 2019 Jan Sucan <jansucan@FreeBSD.org>
* All rights reserved.
@@ -26,9 +26,6 @@
* SUCH DAMAGE.
*/
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
#include <sys/types.h>
#include <sys/socket.h>
@@ -37,10 +34,13 @@ __FBSDID("$FreeBSD$");
#include <netinet/in.h>
#include <err.h>
+#include <math.h>
+#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sysexits.h>
#include <unistd.h>
#include "main.h"
@@ -52,112 +52,195 @@ __FBSDID("$FreeBSD$");
#endif
#if defined(INET) && defined(INET6)
-#define OPTSTR ":46"
+#define OPTSTR PING6OPTS PING4OPTS
#elif defined(INET)
-#define OPTSTR ":4"
+#define OPTSTR PING4OPTS
#elif defined(INET6)
-#define OPTSTR ":6"
+#define OPTSTR PING6OPTS
#else
-#define OPTSTR ""
+#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) && defined(INET6)
+#if defined(INET)
struct in_addr a;
- struct in6_addr a6;
#endif
-#if defined(INET) || defined(INET6)
- struct addrinfo hints;
+#if defined(INET6)
+ struct in6_addr a6;
#endif
- int ch;
-#ifdef INET
- bool ipv4 = false;
+#if defined(INET) && defined(INET6)
+ struct addrinfo hints, *res, *ai;
+ const char *target;
+ int error;
#endif
-#ifdef INET6
- bool ipv6 = false;
+ int opt;
+#ifdef INET6
if (strcmp(getprogname(), "ping6") == 0)
- ipv6 = true;
+ return ping6(argc, argv);
#endif
- while ((ch = getopt(argc, argv, OPTSTR)) != -1) {
- switch(ch) {
+ while ((opt = getopt(argc, argv, ":" OPTSTR)) != -1) {
+ switch (opt) {
#ifdef INET
case '4':
- ipv4 = true;
- break;
+ goto ping4;
#endif
#ifdef INET6
case '6':
- ipv6 = true;
- break;
+ 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();
- optreset = 1;
- optind = 1;
-#if defined(INET) && defined(INET6)
- if (ipv4 && ipv6)
- errx(1, "-4 and -6 cannot be used simultaneously");
-#endif
-
#if defined(INET) && defined(INET6)
- if (inet_pton(AF_INET, argv[argc - 1], &a) == 1) {
- if (ipv6)
- errx(1, "IPv6 requested but IPv4 target address "
- "provided");
+ 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;
- }
- else if (inet_pton(AF_INET6, argv[argc - 1], &a6) == 1) {
- if (ipv4)
- errx(1, "IPv4 requested but IPv6 target address "
- "provided");
+ else if (feature_present("inet6") && !feature_present("inet"))
hints.ai_family = AF_INET6;
- } else if (ipv6)
- hints.ai_family = AF_INET6;
- else if (ipv4)
- hints.ai_family = AF_INET;
- else {
- if (!feature_present("inet6"))
- hints.ai_family = AF_INET;
- else if (!feature_present("inet"))
- hints.ai_family = AF_INET6;
- else {
- struct addrinfo *res;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_socktype = SOCK_RAW;
- hints.ai_family = AF_UNSPEC;
- getaddrinfo(argv[argc - 1], NULL, &hints, &res);
- if (res != NULL) {
- hints.ai_family = res[0].ai_family;
- freeaddrinfo(res);
- }
+ 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;
}
}
-#elif defined(INET)
- hints.ai_family = AF_INET;
-#elif defined(INET6)
- hints.ai_family = AF_INET6;
+ freeaddrinfo(res);
+ errx(EX_NOHOST, "cannot resolve %s", target);
#endif
-
#ifdef INET
- if (hints.ai_family == AF_INET)
- return ping(argc, argv);
-#endif /* INET */
+ping4:
+ optreset = 1;
+ optind = 1;
+ return ping(argc, argv);
+#endif
#ifdef INET6
- if (hints.ai_family == AF_INET6)
- return ping6(argc, argv);
-#endif /* INET6 */
- errx(1, "Unknown host");
+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
@@ -168,48 +251,48 @@ usage(void)
#ifdef INET
"\tping [-4AaDdfHnoQqRrv] [-C pcp] [-c count] "
"[-G sweepmaxsize]\n"
- " [-g sweepminsize] [-h sweepincrsize] [-i wait] "
+ "\t [-g sweepminsize] [-h sweepincrsize] [-i wait] "
"[-l preload]\n"
- " [-M mask | time] [-m ttl]"
+ "\t [-M mask | time] [-m ttl] "
#ifdef IPSEC
"[-P policy] "
#endif
"[-p pattern] [-S src_addr] \n"
- " [-s packetsize] [-t timeout] [-W waittime] [-z tos] "
+ "\t [-s packetsize] [-t timeout] [-W waittime] [-z tos] "
"IPv4-host\n"
"\tping [-4AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] "
"[-i wait]\n"
- " [-l preload] [-M mask | time] [-m ttl] "
+ "\t [-l preload] [-M mask | time] [-m ttl] "
#ifdef IPSEC
"[-P policy] "
#endif
"[-p pattern]\n"
- " [-S src_addr] [-s packetsize] [-T ttl] [-t timeout] [-W waittime]\n"
- " [-z tos] IPv4-mcast-group\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"
+ "\tping [-6AaDd"
#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
- "E"
+ "E"
#endif
- "fHnNoOq"
+ "fHnNoOq"
#ifdef IPV6_USE_MIN_MTU
- "u"
+ "u"
#endif
- "vyY"
+ "vyY"
#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
- "Z"
+ "Z"
#endif
"] "
- "[-b bufsiz] [-c count] [-e gateway]\n"
- " [-I interface] [-i wait] [-k addrtype] [-l preload] "
- "[-m hoplimit]\n"
- " [-p pattern]"
+ "[-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]"
+ " [-P policy]"
#endif
- " [-S sourceaddr] [-s packetsize] [-t timeout]\n"
- " [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n"
+ " [-S sourceaddr] [-s packetsize] [-t timeout]\n"
+ "\t [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n"
#endif /* INET6 */
);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 04:57:59 +0000