- Use err, warn, errx

- Don't use floor, because we would need libm
- Add maxwait option from old ping
- Add a centralized gethost() to get hostnames
- Fix PR/1014 and PR/2017; (adds -D, -T options, and -I and -t for unicast)
- Document exit status

sbin/ping/Makefile

@@ -1,9 +1,10 @@
-#	$NetBSD: Makefile,v 1.7 1995/03/18 14:59:13 cgd Exp $
+#	$NetBSD: Makefile,v 1.8 1997/03/11 21:22:49 christos Exp $
 #	@(#)Makefile	8.1 (Berkeley) 6/5/93
 
 PROG=	ping
 MAN=	ping.8
 BINOWN=	root
 BINMODE=4555
+CFLAGS+=-g
 
 .include <bsd.prog.mk>

sbin/ping/ping.8

@@ -1,4 +1,4 @@
-.\"	$NetBSD: ping.8,v 1.11 1996/11/06 20:42:14 cgd Exp $
+.\"	$NetBSD: ping.8,v 1.12 1997/03/11 21:22:51 christos Exp $
 .\"
 .\" Copyright (c) 1985, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)ping.8	8.2 (Berkeley) 12/11/93
 .\"
-.Dd December 11, 1993
+.Dd March 11, 1997
 .Dt PING 8
 .Os BSD 4.3
 .Sh NAME
@@ -43,16 +43,18 @@
 packets to network hosts
 .Sh SYNOPSIS
 .Nm ping
-.Op Fl dfLnqRrv
+.Op Fl dfnqrvDPQRL
 .Op Fl c Ar count
-.Op Fl I Ar ifaddr
+.Op Fl g Ar gateway
 .Op Fl i Ar wait
 .Op Fl l Ar preload
 .Op Fl p Ar pattern
-.Op Fl S Ar ifaddr
 .Op Fl s Ar packetsize
 .Op Fl t Ar ttl
 .Op Fl w Ar maxwait
+.Op Fl I Ar ifaddr
+.Op Fl S Ar ifaddr
+.Op Fl T Ar tos
 .Ar host
 .Sh DESCRIPTION
 .Nm Ping
@@ -82,6 +84,10 @@ packets.
 Set the
 .Dv SO_DEBUG
 option on the socket being used.
+.It Fl D
+Set the
+.Dv Don't Fragment
+bit.
 .It Fl f
 Flood ping.
 Outputs packets as fast as they come back or one hundred times per second,
@@ -101,10 +107,11 @@ Wait
 .Ar wait
 seconds
 .Em between sending each packet .
-The default is to wait for one second between each packet.
-This option is incompatible with the
-.Fl f
-option.
+The default is to wait for one second between each packet,
+except when the -f option is used the wait interval is 0.01 seconds.
+.It Fl I Ar ifaddr
+Send multicast datagrams on the network interface specified by the
+interface's hostname or IP address.
 .It Fl l Ar preload
 If
 .Ar preload
@@ -153,7 +160,20 @@ The default is 56, which translates into 64
 data bytes when combined
 with the 8 bytes of
 .Tn ICMP
-header data.
+header data. The maximum allowed value is 65468 bytes.
+header data. If the 
+.Fl D
+or
+.Fl T
+options are specified, or the
+.Fl t
+option to a unicast destination, a raw socket will be used and the 8 bytes of
+header data are included in
+.Ar packetsize .
+.It Fl t Ar ttl
+Use the specified time-to-live.
+.It Fl T Ar tos
+Use the specified type of service.
 .It Fl v
 Verbose output.
 .Tn ICMP
@@ -167,13 +187,14 @@ before transmitting the next one.  The default is 10.
 .Pp
 In addition, the following options may be used for multicast pings:
 .Bl -tag -width Ds
-.It Fl I Ar ifaddr
-Transmit using the specified interface address.
 .It Fl L
 Disable the loopback, so the transmitting host doesn't see the ICMP
 requests.
-.It Fl t Ar ttl
-Use the specified time-to-live.
+.It Fl R
+Record Route. Includes the RECORD_ROUTE option in the ECHO_REQUEST
+packet and displays the route buffer on returned packets.  Note that
+the IP header is only large enough for six such routes.  Many hosts
+ignore or discard this option.
 .El
 .Pp
 When using
@@ -199,6 +220,31 @@ argument for
 .Xr stty 1
 for more information).
 .Pp
+.Nm
+continually sends one datagram per second, and prints one line of
+output for every ECHO_RESPONSE returned.  On a trusted system with IP
+Security Options enabled, if the network idiom is not MONO,
+.Nm 
+also prints a second line containing the hexadecimal representation
+of the IP security option in the ECHO_RESPONSE. If the 
+.Fl c
+count option is given, only that number of requests is sent. No
+output is produced if there is no response. Round-trip times and
+packet loss statistics are computed. If duplicate packets are
+received, they are not included in the packet loss calculation,
+although the round trip time of these packets is used in calculating
+the minimum/average/maximum round-trip time numbers. When the
+specified number of packets have been sent (and received) or if
+the program is terminated with an interrupt (SIGINT), a brief
+summary is displayed. When not using the
+.Fl -f
+(flood) option, the first interrupt, usually generated by control-C or DEL,
+causes
+.Nm 
+to wait for its outstanding requests to return. It will wait no longer
+than the longest round trip time encountered by previous, successful pings.
+The second interrupt stops ping immediately.
+.Pp
 This program is intended for use in network testing, measurement and
 management.
 Because of the load it can impose on the network, it is unwise to use
@@ -336,6 +382,10 @@ packets that they use for
 packets, for example either 30 or 60.
 Others may use completely wild values.
 .El
+.Sh EXIT STATUS
+.Nm
+returns 0 on success (the host is alive), and non zero if the arguments are
+incorrect or the host is not responding.
 .Sh BUGS
 Many Hosts and Gateways ignore the
 .Tn RECORD_ROUTE