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commands ping/ping6: Add initial ports of FreeBSD ping and pin6 ports

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These compile but need to have an RTEMS specific main and use the
reentrant getopt.
This commit is contained in:
Joel Sherrill 2012-08-31 19:22:33 -05:00
parent b4cf93e3ad
commit 1f877f9d52
10 changed files with 5833 additions and 2 deletions
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7
freebsd-userspace/Makefile
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@ -66,8 +66,7 @@ C_FILES += lib/libc/net/map_v4v6.c
C_FILES += lib/libc/net/rcmd.c
C_FILES += lib/libc/net/recv.c
C_FILES += lib/libc/net/send.c
# iovec redefined between RTEMS and FreeBSD
# C_FILES += lib/libc/resolv/herror.c
C_FILES += lib/libc/resolv/herror.c
C_FILES += lib/libc/resolv/res_comp.c
C_FILES += lib/libc/resolv/res_data.c
C_FILES += lib/libc/resolv/res_debug.c
@ -86,6 +85,10 @@ C_FILES += lib/libc/string/strsep.c
C_FILES += rtems/rtems-net-setup.c
C_FILES += rtems/syslog.c
# ping command sources
C_FILES += commands/sbin/ping/ping.c
C_FILES += commands/sbin/ping6/ping6.c
C_O_FILES = $(C_FILES:%.c=%.o)
C_D_FILES = $(C_FILES:%.c=%.d)

554
freebsd-userspace/commands/sbin/ping/ping.8 Normal file
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@ -0,0 +1,554 @@
.\" Copyright (c) 1985, 1991, 1993
.\" The Regents of the University of California. 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.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
.\"
.\" @(#)ping.8 8.2 (Berkeley) 12/11/93
.\" $FreeBSD$
.\"
.Dd April 4, 2006
.Dt PING 8
.Os
.Sh NAME
.Nm ping
.Nd send
.Tn ICMP ECHO_REQUEST
packets to network hosts
.Sh SYNOPSIS
.Nm
.Op Fl AaDdfnoQqRrv
.Op Fl c Ar count
.Op Fl G Ar sweepmaxsize
.Op Fl g Ar sweepminsize
.Op Fl h Ar sweepincrsize
.Op Fl i Ar wait
.Op Fl l Ar preload
.Op Fl M Cm mask | time
.Op Fl m Ar ttl
.Op Fl P Ar policy
.Op Fl p Ar pattern
.Op Fl S Ar src_addr
.Op Fl s Ar packetsize
.Op Fl t Ar timeout
.Op Fl W Ar waittime
.Op Fl z Ar tos
.Ar host
.Nm
.Op Fl AaDdfLnoQqRrv
.Op Fl c Ar count
.Op Fl I Ar iface
.Op Fl i Ar wait
.Op Fl l Ar preload
.Op Fl M Cm mask | time
.Op Fl m Ar ttl
.Op Fl P Ar policy
.Op Fl p Ar pattern
.Op Fl S Ar src_addr
.Op Fl s Ar packetsize
.Op Fl T Ar ttl
.Op Fl t Ar timeout
.Op Fl W Ar waittime
.Op Fl z Ar tos
.Ar mcast-group
.Sh DESCRIPTION
The
.Nm
utility uses the
.Tn ICMP
.No protocol Ap s mandatory
.Tn ECHO_REQUEST
datagram to elicit an
.Tn ICMP ECHO_RESPONSE
from a host or gateway.
.Tn ECHO_REQUEST
datagrams
.Pq Dq pings
have an IP and
.Tn ICMP
header, followed by a
.Dq struct timeval
and then an arbitrary number of
.Dq pad
bytes used to fill out the packet.
The options are as follows:
.Bl -tag -width indent
.It Fl A
Audible.
Output a bell
.Tn ( ASCII
0x07)
character when no packet is received before the next packet
is transmitted.
To cater for round-trip times that are longer than the interval
between transmissions, further missing packets cause a bell only
if the maximum number of unreceived packets has increased.
.It Fl a
Audible.
Include a bell
.Tn ( ASCII
0x07)
character in the output when any packet is received.
This option is ignored
if other format options are present.
.It Fl c Ar count
Stop after sending
(and receiving)
.Ar count
.Tn ECHO_RESPONSE
packets.
If this option is not specified,
.Nm
will operate until interrupted.
If this option is specified in conjunction with ping sweeps,
each sweep will consist of
.Ar count
packets.
.It Fl D
Set the Don't Fragment bit.
.It Fl d
Set the
.Dv SO_DEBUG
option on the socket being used.
.It Fl f
Flood ping.
Outputs packets as fast as they come back or one hundred times per second,
whichever is more.
For every
.Tn ECHO_REQUEST
sent a period
.Dq .\&
is printed, while for every
.Tn ECHO_REPLY
received a backspace is printed.
This provides a rapid display of how many packets are being dropped.
Only the super-user may use this option.
.Bf -emphasis
This can be very hard on a network and should be used with caution.
.Ef
.It Fl G Ar sweepmaxsize
Specify the maximum size of
.Tn ICMP
payload when sending sweeping pings.
This option is required for ping sweeps.
.It Fl g Ar sweepminsize
Specify the size of
.Tn ICMP
payload to start with when sending sweeping pings.
The default value is 0.
.It Fl h Ar sweepincrsize
Specify the number of bytes to increment the size of
.Tn ICMP
payload after
each sweep when sending sweeping pings.
The default value is 1.
.It Fl I Ar iface
Source multicast packets with the given interface address.
This flag only applies if the ping destination is a multicast address.
.It Fl i Ar wait
Wait
.Ar wait
seconds
.Em between sending each packet .
The default is to wait for one second between each packet.
The wait time may be fractional, but only the super-user may specify
values less than 1 second.
This option is incompatible with the
.Fl f
option.
.It Fl L
Suppress loopback of multicast packets.
This flag only applies if the ping destination is a multicast address.
.It Fl l Ar preload
If
.Ar preload
is specified,
.Nm
sends that many packets as fast as possible before falling into its normal
mode of behavior.
Only the super-user may use this option.
.It Fl M Cm mask | time
Use
.Dv ICMP_MASKREQ
or
.Dv ICMP_TSTAMP
instead of
.Dv ICMP_ECHO .
For
.Cm mask ,
print the netmask of the remote machine.
Set the
.Va net.inet.icmp.maskrepl
MIB variable to enable
.Dv ICMP_MASKREPLY .
For
.Cm time ,
print the origination, reception and transmission timestamps.
.It Fl m Ar ttl
Set the IP Time To Live for outgoing packets.
If not specified, the kernel uses the value of the
.Va net.inet.ip.ttl
MIB variable.
.It Fl n
Numeric output only.
No attempt will be made to lookup symbolic names for host addresses.
.It Fl o
Exit successfully after receiving one reply packet.
.It Fl P Ar policy
.Ar policy
specifies IPsec policy for the ping session.
For details please refer to
.Xr ipsec 4
and
.Xr ipsec_set_policy 3 .
.It Fl p Ar pattern
You may specify up to 16
.Dq pad
bytes to fill out the packet you send.
This is useful for diagnosing data-dependent problems in a network.
For example,
.Dq Li \-p ff
will cause the sent packet to be filled with all
ones.
.It Fl Q
Somewhat quiet output.
.No Don Ap t
display ICMP error messages that are in response to our query messages.
Originally, the
.Fl v
flag was required to display such errors, but
.Fl v
displays all ICMP error messages.
On a busy machine, this output can be overbearing.
Without the
.Fl Q
flag,
.Nm
prints out any ICMP error messages caused by its own ECHO_REQUEST
messages.
.It Fl q
Quiet output.
Nothing is displayed except the summary lines at startup time and
when finished.
.It Fl R
Record route.
Includes the
.Tn RECORD_ROUTE
option in the
.Tn ECHO_REQUEST
packet and displays
the route buffer on returned packets.
Note that the IP header is only large enough for nine such routes;
the
.Xr traceroute 8
command is usually better at determining the route packets take to a
particular destination.
If more routes come back than should, such as due to an illegal spoofed
packet, ping will print the route list and then truncate it at the correct
spot.
Many hosts ignore or discard the
.Tn RECORD_ROUTE
option.
.It Fl r
Bypass the normal routing tables and send directly to a host on an attached
network.
If the host is not on a directly-attached network, an error is returned.
This option can be used to ping a local host through an interface
that has no route through it
(e.g., after the interface was dropped by
.Xr routed 8 ) .
.It Fl S Ar src_addr
Use the following IP address as the source address in outgoing packets.
On hosts with more than one IP address, this option can be used to
force the source address to be something other than the IP address
of the interface the probe packet is sent on.
If the IP address
is not one of this machine's interface addresses, an error is
returned and nothing is sent.
.It Fl s Ar packetsize
Specify the number of data bytes to be sent.
The default is 56, which translates into 64
.Tn ICMP
data bytes when combined
with the 8 bytes of
.Tn ICMP
header data.
Only the super-user may specify values more than default.
This option cannot be used with ping sweeps.
.It Fl T Ar ttl
Set the IP Time To Live for multicasted packets.
This flag only applies if the ping destination is a multicast address.
.It Fl t Ar timeout
Specify a timeout, in seconds, before ping exits regardless of how
many packets have been received.
.It Fl v
Verbose output.
.Tn ICMP
packets other than
.Tn ECHO_RESPONSE
that are received are listed.
.It Fl W Ar waittime
Time in milliseconds to wait for a reply for each packet sent.
If a reply arrives later, the packet is not printed as replied, but
considered as replied when calculating statistics.
.It Fl z Ar tos
Use the specified type of service.
.El
.Pp
When using
.Nm
for fault isolation, it should first be run on the local host, to verify
that the local network interface is up and running.
Then, hosts and gateways further and further away should be
.Dq pinged .
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 round-trip time statistics.
When the specified number of packets have been sent
(and received)
or if the program is terminated with a
.Dv SIGINT ,
a brief summary is displayed, showing the number of packets sent and
received, and the minimum, mean, maximum, and standard deviation of
the round-trip times.
.Pp
If
.Nm
receives a
.Dv SIGINFO
(see the
.Cm status
argument for
.Xr stty 1 )
signal, the current number of packets sent and received, and the
minimum, mean, and maximum of the round-trip times will be written to
the standard error output.
.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
.Nm
during normal operations or from automated scripts.
.Sh ICMP PACKET DETAILS
An IP header without options is 20 bytes.
An
.Tn ICMP
.Tn ECHO_REQUEST
packet contains an additional 8 bytes worth of
.Tn ICMP
header followed by an arbitrary amount of data.
When a
.Ar packetsize
is given, this indicated the size of this extra piece of data
(the default is 56).
Thus the amount of data received inside of an IP packet of type
.Tn ICMP
.Tn ECHO_REPLY
will always be 8 bytes more than the requested data space
(the
.Tn ICMP
header).
.Pp
If the data space is at least eight bytes large,
.Nm
uses the first eight bytes of this space to include a timestamp which
it uses in the computation of round trip times.
If less than eight bytes of pad are specified, no round trip times are
given.
.Sh DUPLICATE AND DAMAGED PACKETS
The
.Nm
utility will report duplicate and damaged packets.
Duplicate packets should never occur when pinging a unicast address,
and seem to be caused by
inappropriate link-level retransmissions.
Duplicates may occur in many situations and are rarely
(if ever)
a good sign, although the presence of low levels of duplicates may not
always be cause for alarm.
Duplicates are expected when pinging a broadcast or multicast address,
since they are not really duplicates but replies from different hosts
to the same request.
.Pp
Damaged packets are obviously serious cause for alarm and often
indicate broken hardware somewhere in the
.Nm
packet's path (in the network or in the hosts).
.Sh TRYING DIFFERENT DATA PATTERNS
The
(inter)network
layer should never treat packets differently depending on the data
contained in the data portion.
Unfortunately, data-dependent problems have been known to sneak into
networks and remain undetected for long periods of time.
In many cases the particular pattern that will have problems is something
that does not have sufficient
.Dq transitions ,
such as all ones or all zeros, or a pattern right at the edge, such as
almost all zeros.
It is not
necessarily enough to specify a data pattern of all zeros (for example)
on the command line because the pattern that is of interest is
at the data link level, and the relationship between what you type and
what the controllers transmit can be complicated.
.Pp
This means that if you have a data-dependent problem you will probably
have to do a lot of testing to find it.
If you are lucky, you may manage to find a file that either
cannot
be sent across your network or that takes much longer to transfer than
other similar length files.
You can then examine this file for repeated patterns that you can test
using the
.Fl p
option of
.Nm .
.Sh TTL DETAILS
The
.Tn TTL
value of an IP packet represents the maximum number of IP routers
that the packet can go through before being thrown away.
In current practice you can expect each router in the Internet to decrement
the
.Tn TTL
field by exactly one.
.Pp
The
.Tn TCP/IP
specification recommends setting the
.Tn TTL
field for
.Tn IP
packets to 64, but many systems use smaller values
.No ( Bx 4.3
uses 30,
.Bx 4.2
used 15).
.Pp
The maximum possible value of this field is 255, and most
.Ux
systems set
the
.Tn TTL
field of
.Tn ICMP ECHO_REQUEST
packets to 255.
This is why you will find you can
.Dq ping
some hosts, but not reach them with
.Xr telnet 1
or
.Xr ftp 1 .
.Pp
In normal operation
.Nm
prints the ttl value from the packet it receives.
When a remote system receives a ping packet, it can do one of three things
with the
.Tn TTL
field in its response:
.Bl -bullet
.It
Not change it; this is what
.Bx
systems did before the
.Bx 4.3 tahoe
release.
In this case the
.Tn TTL
value in the received packet will be 255 minus the
number of routers in the round-trip path.
.It
Set it to 255; this is what current
.Bx
systems do.
In this case the
.Tn TTL
value in the received packet will be 255 minus the
number of routers in the path
.Em from
the remote system
.Em to
the
.Nm Ns Em ing
host.
.It
Set it to some other value.
Some machines use the same value for
.Tn ICMP
packets that they use for
.Tn TCP
packets, for example either 30 or 60.
Others may use completely wild values.
.El
.Sh EXIT STATUS
The
.Nm
utility exits with one of the following values:
.Bl -tag -width indent
.It 0
At least one response was heard from the specified
.Ar host .
.It 2
The transmission was successful but no responses were received.
.It any other value
An error occurred.
These values are defined in
.In sysexits.h .
.El
.Sh SEE ALSO
.Xr netstat 1 ,
.Xr ifconfig 8 ,
.Xr routed 8 ,
.Xr traceroute 8
.Sh HISTORY
The
.Nm
utility appeared in
.Bx 4.3 .
.Sh AUTHORS
The original
.Nm
utility was written by
.An Mike Muuss
while at the US Army Ballistics
Research Laboratory.
.Sh BUGS
Many Hosts and Gateways ignore the
.Tn RECORD_ROUTE
option.
.Pp
The maximum IP header length is too small for options like
.Tn RECORD_ROUTE
to be completely useful.
.No There Ap s
not much that can be done about this, however.
.Pp
Flood pinging is not recommended in general, and flood pinging the
broadcast address should only be done under very controlled conditions.
.Pp
The
.Fl v
option is not worth much on busy hosts.

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freebsd-userspace/commands/sbin/ping/ping.c Normal file
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freebsd-userspace/commands/sbin/ping6/ping6.8 Normal file
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.\" $KAME: ping6.8,v 1.58 2003/06/20 12:00:22 itojun Exp $
.\"
.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
.\" 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.
.\" 3. Neither the name of the project nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
.\"
.\" $FreeBSD$
.\"
.Dd April 20, 2010
.Dt PING6 8
.Os
.Sh NAME
.Nm ping6
.Nd send
.Tn ICMPv6 ECHO_REQUEST
packets to network hosts
.Sh SYNOPSIS
.Nm
.\" without ipsec, or new ipsec
.Op Fl DdfHmnNoqrRtvwW
.\" old ipsec
.\" .Op Fl ADdEfmnNqRtvwW
.Bk -words
.Op Fl a Ar addrtype
.Ek
.Bk -words
.Op Fl b Ar bufsiz
.Ek
.Bk -words
.Op Fl c Ar count
.Ek
.Bk -words
.Op Fl g Ar gateway
.Ek
.Bk -words
.Op Fl h Ar hoplimit
.Ek
.Bk -words
.Op Fl I Ar interface
.Ek
.Bk -words
.Op Fl i Ar wait
.Ek
.Bk -words
.Op Fl l Ar preload
.Ek
.Bk -words
.\" new ipsec
.Op Fl P Ar policy
.Ek
.Bk -words
.Op Fl p Ar pattern
.Ek
.Bk -words
.Op Fl S Ar sourceaddr
.Ek
.Bk -words
.Op Fl s Ar packetsize
.Ek
.Bk -words
.Op Ar hops ...
.Ek
.Bk -words
.Ar host
.Ek
.Sh DESCRIPTION
The
.Nm
utility uses the
.Tn ICMPv6
protocol's mandatory
.Tn ICMP6_ECHO_REQUEST
datagram to elicit an
.Tn ICMP6_ECHO_REPLY
from a host or gateway.
.Tn ICMP6_ECHO_REQUEST
datagrams (``pings'') have an IPv6 header,
and
.Tn ICMPv6
header formatted as documented in RFC2463.
The options are as follows:
.Bl -tag -width Ds
.\" old ipsec
.\" .It Fl A
.\" Enables transport-mode IPsec authentication header
.\" (experimental).
.It Fl a Ar addrtype
Generate ICMPv6 Node Information Node Addresses query, rather than echo-request.
.Ar addrtype
must be a string constructed of the following characters.
.Bl -tag -width Ds -compact
.It Ic a
requests unicast addresses from all of the responder's interfaces.
If the character is omitted,
only those addresses which belong to the interface which has the
responder's address are requests.
.It Ic c
requests responder's IPv4-compatible and IPv4-mapped addresses.
.It Ic g
requests responder's global-scope addresses.
.It Ic s
requests responder's site-local addresses.
.It Ic l
requests responder's link-local addresses.
.It Ic A
requests responder's anycast addresses.
Without this character, the responder will return unicast addresses only.
With this character, the responder will return anycast addresses only.
Note that the specification does not specify how to get responder's
anycast addresses.
This is an experimental option.
.El
.It Fl b Ar bufsiz
Set socket buffer size.
.It Fl c Ar count
Stop after sending
(and receiving)
.Ar count
.Tn ECHO_RESPONSE
packets.
.It Fl D
Disable IPv6 fragmentation.
.It Fl d
Set the
.Dv SO_DEBUG
option on the socket being used.
.\" .It Fl E
.\" Enables transport-mode IPsec encapsulated security payload
.\" (experimental).
.It Fl f
Flood ping.
Outputs packets as fast as they come back or one hundred times per second,
whichever is more.
For every
.Tn ECHO_REQUEST
sent a period
.Dq \&.
is printed, while for every
.Tn ECHO_REPLY
received a backspace is printed.
This provides a rapid display of how many packets are being dropped.
Only the super-user may use this option.
.Bf -emphasis
This can be very hard on a network and should be used with caution.
.Ef
.It Fl g Ar gateway
Specifies to use
.Ar gateway
as the next hop to the destination.
The gateway must be a neighbor of the sending node.
.It Fl H
Specifies to try reverse-lookup of IPv6 addresses.
The
.Nm
utility does not try reverse-lookup unless the option is specified.
.It Fl h Ar hoplimit
Set the IPv6 hoplimit.
.It Fl I Ar interface
Source packets with the given interface address.
This flag applies if the ping destination is a multicast address,
or link-local/site-local unicast address.
.It Fl i Ar wait
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.
.It Fl l Ar preload
If
.Ar preload
is specified,
.Nm
sends that many packets as fast as possible before falling into its normal
mode of behavior.
Only the super-user may use this option.
.It Fl m
By default,
.Nm
asks the kernel to fragment packets to fit into the minimum IPv6 MTU.
The
.Fl m
option
will suppress the behavior in the following two levels:
when the option is specified once, the behavior will be disabled for
unicast packets.
When the option is more than once, it will be disabled for both
unicast and multicast packets.
.It Fl n
Numeric output only.
No attempt will be made to lookup symbolic names from addresses in the reply.
.It Fl N
Probe node information multicast group
.Pq Li ff02::2:xxxx:xxxx .
.Ar host
must be string hostname of the target
(must not be a numeric IPv6 address).
Node information multicast group will be computed based on given
.Ar host ,
and will be used as the final destination.
Since node information multicast group is a link-local multicast group,
outgoing interface needs to be specified by
.Fl I
option.
.It Fl o
Exit successfully after receiving one reply packet.
.It Fl p Ar pattern
You may specify up to 16
.Dq pad
bytes to fill out the packet you send.
This is useful for diagnosing data-dependent problems in a network.
For example,
.Dq Li \-p ff
will cause the sent packet to be filled with all
ones.
.\" new ipsec
.It Fl P Ar policy
.Ar policy
specifies IPsec policy to be used for the probe.
.It Fl q
Quiet output.
Nothing is displayed except the summary lines at startup time and
when finished.
.It Fl r
Audible.
Include a bell
.Tn ( ASCII
0x07)
character in the output when any packet is received.
.It Fl R
Audible.
Output a bell
.Tn ( ASCII
0x07)
character when no packet is received before the next packet
is transmitted.
To cater for round-trip times that are longer than the interval
between transmissions, further missing packets cause a bell only
if the maximum number of unreceived packets has increased.
.It Fl S Ar sourceaddr
Specifies the source address of request packets.
The source address must be one of the unicast addresses of the sending node,
and must be numeric.
.It Fl s Ar packetsize
Specifies the number of data bytes to be sent.
The default is 56, which translates into 64
.Tn ICMP
data bytes when combined
with the 8 bytes of
.Tn ICMP
header data.
You may need to specify
.Fl b
as well to extend socket buffer size.
.It Fl t
Generate ICMPv6 Node Information supported query types query,
rather than echo-request.
.Fl s
has no effect if
.Fl t
is specified.
.It Fl v
Verbose output.
.Tn ICMP
packets other than
.Tn ECHO_RESPONSE
that are received are listed.
.It Fl w
Generate ICMPv6 Node Information DNS Name query, rather than echo-request.
.Fl s
has no effect if
.Fl w
is specified.
.It Fl W
Same as
.Fl w ,
but with old packet format based on 03 draft.
This option is present for backward compatibility.
.Fl s
has no effect if
.Fl w
is specified.
.It Ar hops
IPv6 addresses for intermediate nodes,
which will be put into type 0 routing header.
.It Ar host
IPv6 address of the final destination node.
.El
.Pp
When using
.Nm
for fault isolation, it should first be run on the local host, to verify
that the local network interface is up and running.
Then, hosts and gateways further and further away should be
.Dq pinged .
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 round-trip time statistics.
When the specified number of packets have been sent
(and received)
or if the program is terminated with a
.Dv SIGINT ,
a brief summary is displayed, showing the number of packets sent and
received, and the minimum, mean, maximum, and standard deviation of
the round-trip times.
.Pp
If
.Nm
receives a
.Dv SIGINFO
(see the
.Cm status
argument for
.Xr stty 1 )
signal, the current number of packets sent and received, and the
minimum, mean, maximum, and standard deviation of the round-trip times
will be written to the standard output in the same format as the
standard completion message.
.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
.Nm
during normal operations or from automated scripts.
.\" .Sh ICMP PACKET DETAILS
.\" An IP header without options is 20 bytes.
.\" An
.\" .Tn ICMP
.\" .Tn ECHO_REQUEST
.\" packet contains an additional 8 bytes worth of
.\" .Tn ICMP
.\" header followed by an arbitrary amount of data.
.\" When a
.\" .Ar packetsize
.\" is given, this indicated the size of this extra piece of data
.\" (the default is 56).
.\" Thus the amount of data received inside of an IP packet of type
.\" .Tn ICMP
.\" .Tn ECHO_REPLY
.\" will always be 8 bytes more than the requested data space
.\" (the
.\" .Tn ICMP
.\" header).
.\" .Pp
.\" If the data space is at least eight bytes large,
.\" .Nm
.\" uses the first eight bytes of this space to include a timestamp which
.\" it uses in the computation of round trip times.
.\" If less than eight bytes of pad are specified, no round trip times are
.\" given.
.Sh DUPLICATE AND DAMAGED PACKETS
The
.Nm
utility will report duplicate and damaged packets.
Duplicate packets should never occur when pinging a unicast address,
and seem to be caused by
inappropriate link-level retransmissions.
Duplicates may occur in many situations and are rarely
(if ever)
a good sign, although the presence of low levels of duplicates may not
always be cause for alarm.
Duplicates are expected when pinging a broadcast or multicast address,
since they are not really duplicates but replies from different hosts
to the same request.
.Pp
Damaged packets are obviously serious cause for alarm and often
indicate broken hardware somewhere in the
.Nm
packet's path
(in the network or in the hosts).
.Sh TRYING DIFFERENT DATA PATTERNS
The
(inter)network
layer should never treat packets differently depending on the data
contained in the data portion.
Unfortunately, data-dependent problems have been known to sneak into
networks and remain undetected for long periods of time.
In many cases the particular pattern that will have problems is something
that does not have sufficient
.Dq transitions ,
such as all ones or all zeros, or a pattern right at the edge, such as
almost all zeros.
It is not
necessarily enough to specify a data pattern of all zeros (for example)
on the command line because the pattern that is of interest is
at the data link level, and the relationship between what you type and
what the controllers transmit can be complicated.
.Pp
This means that if you have a data-dependent problem you will probably
have to do a lot of testing to find it.
If you are lucky, you may manage to find a file that either
cannot
be sent across your network or that takes much longer to transfer than
other similar length files.
You can then examine this file for repeated patterns that you can test
using the
.Fl p
option of
.Nm .
.Sh EXIT STATUS
The
.Nm
utility returns 0 on success (the host is alive),
2 if the transmission was successful but no responses were received,
any other non-zero value if the arguments are incorrect or
another error has occured.
.Sh EXAMPLES
Normally,
.Nm
works just like
.Xr ping 8
would work; the following will send ICMPv6 echo request to
.Li dst.foo.com .
.Bd -literal -offset indent
ping6 -n dst.foo.com
.Ed
.Pp
The following will probe hostnames for all nodes on the network link attached to
.Li wi0
interface.
The address
.Li ff02::1
is named the link-local all-node multicast address, and the packet would
reach every node on the network link.
.Bd -literal -offset indent
ping6 -w ff02::1%wi0
.Ed
.Pp
The following will probe addresses assigned to the destination node,
.Li dst.foo.com .
.Bd -literal -offset indent
ping6 -a agl dst.foo.com
.Ed
.Sh SEE ALSO
.Xr netstat 1 ,
.Xr icmp6 4 ,
.Xr inet6 4 ,
.Xr ip6 4 ,
.Xr ifconfig 8 ,
.Xr ping 8 ,
.Xr routed 8 ,
.Xr traceroute 8 ,
.Xr traceroute6 8
.Rs
.%A A. Conta
.%A S. Deering
.%T "Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification"
.%N RFC2463
.%D December 1998
.Re
.Rs
.%A Matt Crawford
.%T "IPv6 Node Information Queries"
.%N draft-ietf-ipngwg-icmp-name-lookups-09.txt
.%D May 2002
.%O work in progress material
.Re
.Sh HISTORY
The
.Xr ping 8
utility appeared in
.Bx 4.3 .
The
.Nm
utility with IPv6 support first appeared in the WIDE Hydrangea IPv6
protocol stack kit.
.Pp
IPv6 and IPsec support based on the KAME Project
.Pq Pa http://www.kame.net/
stack was initially integrated into
.Fx 4.0 .
.Sh BUGS
The
.Nm
utility
is intentionally separate from
.Xr ping 8 .
.Pp
There have been many discussions on why we separate
.Nm
and
.Xr ping 8 .
Some people argued that it would be more convenient to uniform the
ping command for both IPv4 and IPv6.
The followings are an answer to the request.
.Pp
From a developer's point of view:
since the underling raw sockets API is totally different between IPv4
and IPv6, we would end up having two types of code base.
There would actually be less benefit to uniform the two commands
into a single command from the developer's standpoint.
.Pp
From an operator's point of view: unlike ordinary network applications
like remote login tools, we are usually aware of address family when using
network management tools.
We do not just want to know the reachability to the host, but want to know the
reachability to the host via a particular network protocol such as
IPv6.
Thus, even if we had a unified
.Xr ping 8
command for both IPv4 and IPv6, we would usually type a
.Fl 6
or
.Fl 4
option (or something like those) to specify the particular address family.
This essentially means that we have two different commands.

2817
freebsd-userspace/commands/sbin/ping6/ping6.c Normal file
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File diff suppressed because it is too large Load Diff

3
freebsd-userspace/from-freebsd.sh
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@ -100,10 +100,12 @@ do
cp ${src}/${f} ${dest}/${d}
done <<EOF
include/db.h
include/err.h
include/ifaddrs.h
include/netconfig.h
include/nsswitch.h
include/resolv.h
include/sysexit.h
include/res_update.h
include/rpc/auth.h
include/rpc/auth_unix.h
@ -243,6 +245,7 @@ net/if_types.h
net/in.h
net/route.h
netinet/in.h
netinet/icmp6.h
sys/socket.h
sys/sysctl.h
EOF

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/*-
* Copyright (c) 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)err.h 8.1 (Berkeley) 6/2/93
* $FreeBSD$
*/
#ifndef _ERR_H_
#define _ERR_H_
/*
* Don't use va_list in the err/warn prototypes. Va_list is typedef'd in two
* places (<machine/varargs.h> and <machine/stdarg.h>), so if we include one
* of them here we may collide with the utility's includes. It's unreasonable
* for utilities to have to include one of them to include err.h, so we get
* __va_list from <sys/_types.h> and use it.
*/
#include <sys/cdefs.h>
#include <sys/_types.h>
__BEGIN_DECLS
void err(int, const char *, ...) __dead2 __printf0like(2, 3);
void verr(int, const char *, __va_list) __dead2 __printf0like(2, 0);
void errc(int, int, const char *, ...) __dead2 __printf0like(3, 4);
void verrc(int, int, const char *, __va_list) __dead2
__printf0like(3, 0);
void errx(int, const char *, ...) __dead2 __printf0like(2, 3);
void verrx(int, const char *, __va_list) __dead2 __printf0like(2, 0);
void warn(const char *, ...) __printf0like(1, 2);
void vwarn(const char *, __va_list) __printf0like(1, 0);
void warnc(int, const char *, ...) __printf0like(2, 3);
void vwarnc(int, const char *, __va_list) __printf0like(2, 0);
void warnx(const char *, ...) __printflike(1, 2);
void vwarnx(const char *, __va_list) __printflike(1, 0);
void err_set_file(void *);
void err_set_exit(void (*)(int));
__END_DECLS
#endif /* !_ERR_H_ */

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@ -0,0 +1,2 @@
#include <freebsd/bsd.h>
#include <freebsd/netinet/icmp6.h>

2
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#include <freebsd/bsd.h>
#include <freebsd/netinet/ip6.h>

118
freebsd-userspace/include/sysexits.h Normal file
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@ -0,0 +1,118 @@
/*
* Copyright (c) 1987, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)sysexits.h 8.1 (Berkeley) 6/2/93
*/
#ifndef _SYSEXITS_H_
#define _SYSEXITS_H_
/*
* SYSEXITS.H -- Exit status codes for system programs.
*
* This include file attempts to categorize possible error
* exit statuses for system programs, notably delivermail
* and the Berkeley network.
*
* Error numbers begin at EX__BASE to reduce the possibility of
* clashing with other exit statuses that random programs may
* already return. The meaning of the codes is approximately
* as follows:
*
* EX_USAGE -- The command was used incorrectly, e.g., with
* the wrong number of arguments, a bad flag, a bad
* syntax in a parameter, or whatever.
* EX_DATAERR -- The input data was incorrect in some way.
* This should only be used for user's data & not
* system files.
* EX_NOINPUT -- An input file (not a system file) did not
* exist or was not readable. This could also include
* errors like "No message" to a mailer (if it cared
* to catch it).
* EX_NOUSER -- The user specified did not exist. This might
* be used for mail addresses or remote logins.
* EX_NOHOST -- The host specified did not exist. This is used
* in mail addresses or network requests.
* EX_UNAVAILABLE -- A service is unavailable. This can occur
* if a support program or file does not exist. This
* can also be used as a catchall message when something
* you wanted to do doesn't work, but you don't know
* why.
* EX_SOFTWARE -- An internal software error has been detected.
* This should be limited to non-operating system related
* errors as possible.
* EX_OSERR -- An operating system error has been detected.
* This is intended to be used for such things as "cannot
* fork", "cannot create pipe", or the like. It includes
* things like getuid returning a user that does not
* exist in the passwd file.
* EX_OSFILE -- Some system file (e.g., /etc/passwd, /etc/utmp,
* etc.) does not exist, cannot be opened, or has some
* sort of error (e.g., syntax error).
* EX_CANTCREAT -- A (user specified) output file cannot be
* created.
* EX_IOERR -- An error occurred while doing I/O on some file.
* EX_TEMPFAIL -- temporary failure, indicating something that
* is not really an error. In sendmail, this means
* that a mailer (e.g.) could not create a connection,
* and the request should be reattempted later.
* EX_PROTOCOL -- the remote system returned something that
* was "not possible" during a protocol exchange.
* EX_NOPERM -- You did not have sufficient permission to
* perform the operation. This is not intended for
* file system problems, which should use NOINPUT or
* CANTCREAT, but rather for higher level permissions.
*/
#define EX_OK 0 /* successful termination */
#define EX__BASE 64 /* base value for error messages */
#define EX_USAGE 64 /* command line usage error */
#define EX_DATAERR 65 /* data format error */
#define EX_NOINPUT 66 /* cannot open input */
#define EX_NOUSER 67 /* addressee unknown */
#define EX_NOHOST 68 /* host name unknown */
#define EX_UNAVAILABLE 69 /* service unavailable */
#define EX_SOFTWARE 70 /* internal software error */
#define EX_OSERR 71 /* system error (e.g., can't fork) */
#define EX_OSFILE 72 /* critical OS file missing */
#define EX_CANTCREAT 73 /* can't create (user) output file */
#define EX_IOERR 74 /* input/output error */
#define EX_TEMPFAIL 75 /* temp failure; user is invited to retry */
#define EX_PROTOCOL 76 /* remote error in protocol */
#define EX_NOPERM 77 /* permission denied */
#define EX_CONFIG 78 /* configuration error */
#define EX__MAX 78 /* maximum listed value */
#endif /* !_SYSEXITS_H_ */