Commit Graph

17 Commits

Author SHA1 Message Date
Pedro F. Giffuni
1de7b4b805 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00
Gleb Smirnoff
56d5e0967c Stop including if_var.h from userland.
Sponsored by:	Nginx, Inc.
2015-04-06 09:42:23 +00:00
Marcel Moolenaar
ade9ccfe21 Convert netstat to use libxo.
Obtained from:  Phil Shafer <phil@juniper.net>
Ported to -current by: alfred@ (mostly), Kim Shrier
Formatting: marcel@
Sponsored by:   Juniper Networks, Inc.
2015-02-21 23:47:20 +00:00
Xin LI
821df508e8 Revert most part of 200420 as requested, as more review and polish is
needed.
2009-12-13 03:14:06 +00:00
Xin LI
6f2d322192 Remove unneeded header includes from usr.bin/ except contributed code.
Tested with:	make universe
2009-12-11 23:35:38 +00:00
Christian S.J. Peron
0e37f3e196 Implement the -z (zero counters) option for the various bpf counters.
Add necessary changes to the kernel for this (basically introduce a
bpf_zero_counters() function).  As well, update the man page.

MFC after:	1 month
Discussed with:	rwatson
2009-06-19 20:31:44 +00:00
Christian S.J. Peron
582908b314 Catch netstat up for the new bpf stats structures. Print 64 bit values
properly.

Sponsored by:	Seccuris Inc
MFC after:	4 months
2008-03-24 13:50:39 +00:00
David E. O'Brien
65475bc8e6 style(9)
+ kread is not a boolean, so check it as such
+ fix $FreeBSD$ Ids
+ denote copyrights with /*-
+ misc whitespace changes.
2008-01-02 23:26:11 +00:00
John Baldwin
feda1a4372 Restore netstat -M functionality for most statistics on core dumps. In
general, when support was added to netstat for fetching data using sysctl,
no provision was left for fetching equivalent data from a core dump, and
in fact, netstat would _always_ fetch data from the live kernel using
sysctl even when -M was specified resulting in the user believing they
were getting data from coredumps when they actually weren't.  Some specific
changes:
- Add a global 'live' variable that is true if netstat is running against
  the live kernel and false if -M has been specified.
- Stop abusing the sysctl flag in the protocol tables to hold the protocol
  number.  Instead, the protocol is now its own field in the tables, and
  it is passed as a separate parameter to the PCB and stat routines rather
  than overloading the KVM offset parameter.
- Don't run PCB or stats functions who don't have a namelist offset if we
  are being run against a crash dump (!live).
- For the inet and unix PCB routines, we generate the same buffer from KVM
  that the sysctl usually generates complete with the header and trailer.
- Don't run bpf stats for !live (before it would just silently always run
  live).
- kread() no longer trashes memory when opening the buffer if there is an
  error on open and the passed in buffer is smaller than _POSIX2_LINE_MAX.
- The multicast routing code doesn't fallback to kvm on live kernels if
  the sysctl fails.  Keeping this made the code rather hairy, and netstat
  is already tied to the kernel ABI anyway (even when using sysctl's since
  things like xinpcb contain an inpcb) so any kernels this is run against
  that have the multicast routing stuff should have the sysctls.
- Don't try to dig around in the kernel linker in the netgraph PCB routine
  for core dumps.

Other notes:
- sctp's PCB routine only works on live kernels, it looked rather
  complicated to generate all the same stuff via KVM.  Someone can always
  add it later if desired though.
- Fix the ipsec removal bug where N_xxx for IPSEC stats weren't renumbered.
- Use sysctlbyname() everywhere rather than hardcoded mib values.

MFC after:	1 week
Approved by:	re (rwatson)
2007-07-16 17:15:55 +00:00
Jung-uk Kim
560a54e10c Add three new ioctl(2) commands for bpf(4).
- BIOCGDIRECTION and BIOCSDIRECTION get or set the setting determining
whether incoming, outgoing, or all packets on the interface should be
returned by BPF.  Set to BPF_D_IN to see only incoming packets on the
interface.  Set to BPF_D_INOUT to see packets originating locally and
remotely on the interface.  Set to BPF_D_OUT to see only outgoing
packets on the interface.  This setting is initialized to BPF_D_INOUT
by default.  BIOCGSEESENT and BIOCSSEESENT are obsoleted by these but
kept for backward compatibility.

- BIOCFEEDBACK sets packet feedback mode.  This allows injected packets
to be fed back as input to the interface when output via the interface is
successful.  When BPF_D_INOUT direction is set, injected outgoing packet
is not returned by BPF to avoid duplication.  This flag is initialized to
zero by default.

Note that libpcap has been modified to support BPF_D_OUT direction for
pcap_setdirection(3) and PCAP_D_OUT direction is functional now.

Reviewed by:	rwatson
2007-02-26 22:24:14 +00:00
Yaroslav Tykhiy
04f7f23bf8 Don't shadow globals.
Found by:       WARNS=6
MFC after:      3 days
2006-11-27 19:50:50 +00:00
Yaroslav Tykhiy
7b95a1ebbd Achieve WARNS=2 by using uintmax_t to pass around 64-bit quantities,
including to printf().  Using uintmax_t is also robust to further
extensions in both the C language and the bitwidth of kernel counters.

Tested on:	i386 amd64 ia64
2006-07-28 16:09:19 +00:00
Christian S.J. Peron
8729849a45 Use is '-' to imply that the flag is not set, rather than '.'. 2005-09-15 16:09:24 +00:00
Christian S.J. Peron
6f798df578 Print a warning if we fail to retrieve the process name for any reason. 2005-09-13 23:11:16 +00:00
Christian S.J. Peron
15f3d81f9c If there are'nt any bpf descriptors to process than dont bother attempting to
retrieve statistic information for them.

Pointed out by:	Pawel Worach < pawel.worach at gmail.com >
2005-09-13 22:13:01 +00:00
Christian S.J. Peron
48d91509de Free the bpf descriptor array after we are done with it. This probably isnt
that critical as the program exits after this point anyway, but this may
not always be the case.
2005-09-07 19:28:01 +00:00
Christian S.J. Peron
6b463eed3a Merge bpfstat's functionality into the netstat(1) utility. This adds
a -B option which causes bpf peers to be printed. This option can be
used in conjunction with -I if information about specific interfaces
is desired. This is similar to what NetBSD added to their version of
netstat.

$ netstat -B
  Pid  Netif  Flags      Recv      Drop     Match Sblen Hblen Command
 1137    lo0 p--s--         0         0         0     0     0 tcpdump
  205   sis0 -ifs-l     37331         0         1     0     0 dhclient
$

$ netstat -I lo0 -B
  Pid  Netif  Flags      Recv      Drop     Match Sblen Hblen Command
 1174    lo0 p--s--         0         0         0     0     0 tcpdump
$

-Add bpf.c which stores all the code for retrieving and parsing bpf
 related statistics.
-Modify main.c to add support for the -B option and hook it into the
 program logic.
-Add bpf.c to the build.
-Document this new functionality in the man page and bump the revision
 date.
-Add prototype for bpf_stats function.
2005-09-07 17:35:16 +00:00