oweals/busybox.git
8 years agoash: Remove unused EV_BACKCMD flag
Denys Vlasenko [Wed, 28 Sep 2016 17:44:16 +0000 (19:44 +0200)]
ash: Remove unused EV_BACKCMD flag

    The original ash defered forking commands in backquotes so builtins
    could be run in the same context as the shell.  This behavior was
    controlled using the EV_BACKCMD to evaltree.

    Unfortunately, as Matthias Scheler noticed in 1999 (NetBSD PR/7814),
    the result was counterintuitive; for example, echo "`cd /`" would
    change the cwd.  So ash 0.3.5 left out that optimization.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: eval: Return status in eval functions
Denys Vlasenko [Wed, 28 Sep 2016 17:41:57 +0000 (19:41 +0200)]
ash: eval: Return status in eval functions

Backported from dash:

    eval: Return status in eval functions

    The exit status is currently clobbered too early for case statements
    and loops.  This patch fixes it by making the eval functions return
    the current exit status and setting them in one place -- evaltree.

    Harald van Dijk pointed out a number of bugs in the original patch.

function                                             old     new   delta
evalcommand                                         1226    1242     +16
cmdloop                                              383     398     +15
evalfor                                              223     227      +4
evalcase                                             271     275      +4
localcmd                                             348     350      +2
evaltreenr                                           927     928      +1
evaltree                                             927     928      +1
evalsubshell                                         150     151      +1
evalpipe                                             356     357      +1
parse_command                                       1585    1584      -1
evalloop                                             177     164     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 9/2 up/down: 45/-14)             Total: 31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotraceroute: cleanup and fixes for packet size calculations
Denys Vlasenko [Wed, 28 Sep 2016 16:39:06 +0000 (18:39 +0200)]
traceroute: cleanup and fixes for packet size calculations

Remove FEATURE_TRACEROUTE_SOURCE_ROUTE: it's off by default, and
source routing is not used in real world.

Tested that "traceroute -n ::1 100" and "traceroute -n 127.0.0.1 100"
both send 100 byte IP packets (this matches what traceroute on Fedora
Rawhide is doing).

function                                             old     new   delta
common_traceroute_main                              3731    3738      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agovi: fix '' command (goto to prev context)
Denys Vlasenko [Wed, 28 Sep 2016 14:23:05 +0000 (16:23 +0200)]
vi: fix '' command (goto to prev context)

The '' command in vi doesn't currently work because after the first
apostrophe is read, the next character is converted to an integer
between 0 and 25 inclusive (for indexing the array of marks). The
comparison of the converted character with an apostrophe therefore never
succeeds, meaning that '' doesn't do anything.

Based on the patch by Francis Rounds <francis.rounds@4bridgeworks.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agomount: for cifs, dont insert "ip=ADDR" option if user gave it explicitly
Denys Vlasenko [Tue, 27 Sep 2016 19:02:35 +0000 (21:02 +0200)]
mount: for cifs, dont insert "ip=ADDR" option if user gave it explicitly

This makes it possible to use scoped IPv6 addresses:

mount -t cifs -o ip=<ADDR>%<iface_id> //<ADDR>/test test

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples: wpa_supplicant.conf has a wrong field deleted in examples
Denys Vlasenko [Mon, 26 Sep 2016 18:47:17 +0000 (20:47 +0200)]
examples: wpa_supplicant.conf has a wrong field deleted in examples

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agomount: tweak "IPv6 scoped addr" commit
Denys Vlasenko [Mon, 26 Sep 2016 18:36:30 +0000 (20:36 +0200)]
mount: tweak "IPv6 scoped addr" commit

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb: make xmalloc_sockaddr2dotted use NI_NUMERICSCOPE
Denys Vlasenko [Mon, 26 Sep 2016 17:53:04 +0000 (19:53 +0200)]
libbb: make xmalloc_sockaddr2dotted use NI_NUMERICSCOPE

Gives "mount -t cifs //fe80::6a05:caff:fe3e:dbf5%eth0/test test"
a chance to work: mount must pass "ip=numeric_IPv6%numeric_iface_id"
in the omunt option string. Currently, it does not.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb/speed_table.c: expand comments
Denys Vlasenko [Mon, 26 Sep 2016 12:37:12 +0000 (14:37 +0200)]
libbb/speed_table.c: expand comments

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotypo fix in comment
Denys Vlasenko [Mon, 26 Sep 2016 06:52:52 +0000 (08:52 +0200)]
typo fix in comment

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: in heredoc code, fix access past the end of allocated memory. Closes 9276
Denys Vlasenko [Sun, 25 Sep 2016 19:24:04 +0000 (21:24 +0200)]
ash: in heredoc code, fix access past the end of allocated memory. Closes 9276

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix handling of NULs in $'abc\000def\x00asd'. Closes 9286
Denys Vlasenko [Sun, 25 Sep 2016 18:54:25 +0000 (20:54 +0200)]
ash: fix handling of NULs in $'abc\000def\x00asd'. Closes 9286

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoifupdown: improve help text, add comment about run-parts error msg
Denys Vlasenko [Sun, 25 Sep 2016 00:05:24 +0000 (02:05 +0200)]
ifupdown: improve help text, add comment about run-parts error msg

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb: handle \S in /etc/issue
Denys Vlasenko [Sat, 24 Sep 2016 21:50:43 +0000 (23:50 +0200)]
libbb: handle \S in /etc/issue

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoAUTHORS: Add myself to AUTHORS
Linus Walleij [Tue, 20 Sep 2016 21:31:56 +0000 (23:31 +0200)]
AUTHORS: Add myself to AUTHORS

Instead of complaining that my authorship of the rewrite of
the mdev to use /sys/dev is totally gone from the git history
I bravely take credit by adding myself to the AUTHORS file
instead, he he.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: use glob() from libc
Denys Vlasenko [Wed, 21 Sep 2016 14:25:58 +0000 (16:25 +0200)]
ash: use glob() from libc

Adapted from dash.
The "homegrown" glob code is retained (ifdef'ed out).
This changes was inspired by bug 9261, which detected out-of bounds use of heap
for 2098 byte long name in the "homegrown" code. This is still not fixed...

function                                             old     new   delta
expandarg                                            960     982     +22
static.syntax_index_table                             26      25      -1
static.spec_symbls                                    27      26      -1
static.metachars                                       4       -      -4
addfname                                              42       -     -42
msort                                                126       -    -126
expmeta                                              528       -    -528
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 1/2 up/down: 22/-702)          Total: -680 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples/var_service/supplicant_if: new service example
Denys Vlasenko [Tue, 20 Sep 2016 16:09:00 +0000 (18:09 +0200)]
examples/var_service/supplicant_if: new service example

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoifupdown: when flushing addresses with "ip", add label %label%
Denys Vlasenko [Tue, 20 Sep 2016 15:31:11 +0000 (17:31 +0200)]
ifupdown: when flushing addresses with "ip", add label %label%

User report:

or our board we setup eth0:0 on a 10.10.10.x/29 netwrok.

The problem is ip addr flush dev eth0:0 removes all ip addresses from
eth0.  You can see this if you run
ip -stat -stat addr flush dev eth0:0

2: eth0    inet 172.27.105.10/22 brd 172.27.107.255 scope global eth0
       valid_lft forever preferred_lft forever
2: eth0    inet 10.10.10.9/29 scope global eth0:0
       valid_lft forever preferred_lft forever
2: eth0    inet6 fe80::a2f6:fdff:fe18:2b13/64 scope link
       valid_lft forever preferred_lft forever

*** Round 1, deleting 3 addresses ***
*** Flush is complete after 1 round ***

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix handling of bashism $'xxx' with high-bit chars. Closes 9236
Denys Vlasenko [Tue, 20 Sep 2016 15:04:09 +0000 (17:04 +0200)]
ash: fix handling of bashism $'xxx' with high-bit chars. Closes 9236

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: document better where bad redirect syntax is detected
Denys Vlasenko [Tue, 20 Sep 2016 14:22:24 +0000 (16:22 +0200)]
hush: document better where bad redirect syntax is detected

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibnetlink: fix alignment of netlink messages
Hauke Mehrtens [Fri, 16 Sep 2016 20:40:28 +0000 (22:40 +0200)]
libnetlink: fix alignment of netlink messages

A padding to align a message should not only be added between
different attributes of a netlink message, but also at the end of the
message to pad it to the correct size.

Without this patch the following command does not work and returns an
error code:
ip link add type nlmon

Without this ip from busybox sends this:

sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000},
msg_namelen=12, msg_iov=[{iov_base={{len=45, ...},
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\22\0\t\0\1nlmon"}, iov_len=45}],
msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 45
return value: 2

The normal ip utile from iproute2 sends this:

sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000},
msg_namelen=12, msg_iov=[{iov_base={{len=48, ...},
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\22\0\t\0\1nlmon\0\0\0"}, iov_len=48}],
msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 48
return value: 0

With this patch ip from busybox sends this:

sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000},
msg_namelen=12, msg_iov=[{iov_base={{len=48, ...},
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\22\0\t\0\1nlmon\0\0\0"}, iov_len=48}],
msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 48
return value: 0

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb: do not use fflush_unlocked, musl does not like fflush_unlocked(NULL)
Denys Vlasenko [Sun, 18 Sep 2016 19:49:30 +0000 (21:49 +0200)]
libbb: do not use fflush_unlocked, musl does not like fflush_unlocked(NULL)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: exit after subshell error when errexit option is set
Rostislav Skudnov [Fri, 16 Sep 2016 19:04:02 +0000 (19:04 +0000)]
ash: exit after subshell error when errexit option is set

When "set -e" option is on, shell must exit when any command fails,
including compound commands of the form (compound-list) executed in a
subshell. Bash and dash shells have this behaviour.

Also add a corresponding testcase.

Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agofdisk: fix CONFIG_FEATURE_SUN_LABEL=y build
Denys Vlasenko [Sat, 17 Sep 2016 19:05:06 +0000 (21:05 +0200)]
fdisk: fix CONFIG_FEATURE_SUN_LABEL=y build

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agofix "aloc" -> "alloc" typos
Denys Vlasenko [Sat, 17 Sep 2016 18:58:22 +0000 (20:58 +0200)]
fix "aloc" -> "alloc" typos

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: add a FIXME for bug 9246
Denys Vlasenko [Sat, 17 Sep 2016 18:53:47 +0000 (20:53 +0200)]
ash: add a FIXME for bug 9246

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosvlogd: strip leading '!' from processor lines
Francis Rounds [Wed, 14 Sep 2016 11:53:51 +0000 (11:53 +0000)]
svlogd: strip leading '!' from processor lines

When using svlogd's processor functionality to run arbitrary commands
on log rotation, the line in the config is executed verbatim, i.e. the
exclamation mark is included.

For example, if the config file contains:

    s100
    !cat

then when it's time to rotate the log files after each 100 bytes, sh -c
"!cat" will be run, instead of sh -c "cat" as intended. The result is
svlogd logging

    /bin/bash: !cat: command not found
    svlogd: warning: processor failed, restart: /tmp/svlogd/

over and over again as it keeps attempting to execute the processor and
failing (unless you happen to have a "!cat" binary around :)).

Skipping the exclamation mark when performing the wstrdup() fixes the
issue.

Signed-off-by: Francis Rounds <francis.rounds@4bridgeworks.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agovi: make "g<key>" error message less likely to show garbage
Denys Vlasenko [Thu, 15 Sep 2016 11:53:42 +0000 (13:53 +0200)]
vi: make "g<key>" error message less likely to show garbage

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb:/send_to_from: do not require that "to" should have the same AF. Closes 9146
Denys Vlasenko [Thu, 15 Sep 2016 11:20:51 +0000 (13:20 +0200)]
libbb:/send_to_from: do not require that "to" should have the same AF. Closes 9146

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agomodutils: support finit_module syscall
Mike Frysinger [Thu, 15 Sep 2016 10:16:33 +0000 (12:16 +0200)]
modutils: support finit_module syscall

On some systems like Chromium OS, loading modules from non-verified
filesystems is denied.  Only finit_module is allowed because an open
fd is passed which can be checked against a verified location.

Change the module loading code to first attempt finit_module and if
that fails for whatever reason, fall back to the existing logic.

On x86_64, this adds ~80 bytes to modutils/modutils.o and ~68 bytes
to modutils/modprobe-small.o.

Signed-off-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoless: switch off nonblock on kbd_fd before exit
Denys Vlasenko [Tue, 13 Sep 2016 19:05:48 +0000 (21:05 +0200)]
less: switch off nonblock on kbd_fd before exit

This is only necessary if we use stdout fd.

function                                             old     new   delta
less_exit                                             32      51     +19
less_main                                           2540    2543      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 22/0)               Total: 22 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoless: fall back to using fd #1 for keyboard reading. Closes 9231
Denys Vlasenko [Tue, 13 Sep 2016 18:53:38 +0000 (20:53 +0200)]
less: fall back to using fd #1 for keyboard reading. Closes 9231

function                                             old     new   delta
less_main                                           2535    2540      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agomdev: create devices from /sys/dev
Denys Vlasenko [Wed, 7 Sep 2016 12:09:01 +0000 (14:09 +0200)]
mdev: create devices from /sys/dev

Currently some new devices that have a bus but no class will
be missed by mdev coldplug device creation after boot. This
happens because mdev recursively searches /sys/class which will
by definition only find class devices.

Some important devices such as iio and gpiochip does not have
a class. But users will need them.

This switches from using /sys/class as the place to look for
devices to create to using /sys/dev where all char and block
devices are listed.

The subsystem lookup code that provide the G.subsystem
environment variable is changed from using the directory
name of the class device to instead dereference the
"subsystem" symlink for the device, and look at the last
element of the path of the symlink for the subsystem, which
will work with class devices and bus devices alike. (The new
bus-only devices only symlink to the /sys/bus/* hierarchy.)

We delete the legacy kernel v2.6.2x /sys/block device path
code as part of this change. It's too old to be kept alive.

Tested on kernel v4.6-rc2 with a bunch of devices, including
some IIO and gpiochip devices.

With a print inserted before make_device() the log looks
like so:

Create device from "/sys/dev/char/1:1", subsystem "mem"
Create device from "/sys/dev/char/1:2", subsystem "mem"
Create device from "/sys/dev/char/1:3", subsystem "mem"
Create device from "/sys/dev/char/1:5", subsystem "mem"
(...)
Create device from "/sys/dev/block/179:56", subsystem "block"
Create device from "/sys/dev/block/179:64", subsystem "block"

function                                             old     new   delta
mdev_main                                           1388    1346     -42
dirAction                                            134      14    -120
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-162)           Total: -162 bytes

Cc: Isaac Dunham <ibid.ag@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosendmail: make it possible to pause after connection helper is started
Denys Vlasenko [Wed, 7 Sep 2016 11:16:33 +0000 (13:16 +0200)]
sendmail: make it possible to pause after connection helper is started

If a non-starttls helper is in use, initial 220 response is processed by us,
not by helper.
Some servers consider us to be a spammer if we don't wait for it.

It is not in protocol, but it is a real-life problem.

The workaround in this patch is a magic envvar, $SMTP_ANTISPAM_DELAY:

...
-H 'PROG ARGS' Run connection helper. Examples:
openssl s_client -quiet -tls1 -starttls smtp -connect smtp.gmail.com:25
openssl s_client -quiet -tls1 -connect smtp.gmail.com:465
$SMTP_ANTISPAM_DELAY: seconds to wait after helper connect
...

By using it, people can tweak sendmail behavior even if sendmail invocation
is buried in some scripts.

function                                             old     new   delta
packed_usage                                       30464   30497     +33
sendmail_main                                       1185    1206     +21
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 54/0)               Total: 54 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agovolume_id: Add support for UBIFS
Serj Kalichev [Mon, 29 Aug 2016 15:28:34 +0000 (18:28 +0300)]
volume_id: Add support for UBIFS

Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb/xwrite: print errno on "short write" errors
Denys Vlasenko [Mon, 5 Sep 2016 13:20:10 +0000 (15:20 +0200)]
libbb/xwrite: print errno on "short write" errors

Lauri Kasanen:
:: Over at TinyCore, we receive a huge number of questions of the type "I
:: got "short write", what does it mean?". Mostly for the rpi port and when
:: using bb wget.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb/speed_table.c: survive B115200 and B230400 not fitting into 16 bits
Denys Vlasenko [Thu, 1 Sep 2016 09:44:13 +0000 (11:44 +0200)]
libbb/speed_table.c: survive B115200 and B230400 not fitting into 16 bits

Seen on OSX.
While at it, expand baud table with B500000..B4000000

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years ago*: placate some compile warnings on OSX
Denys Vlasenko [Thu, 1 Sep 2016 09:16:22 +0000 (11:16 +0200)]
*: placate some compile warnings on OSX

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosed: fix "sed n (flushes pattern space, terminates early)" testcase failure
Denys Vlasenko [Wed, 31 Aug 2016 23:59:11 +0000 (01:59 +0200)]
sed: fix "sed n (flushes pattern space, terminates early)" testcase failure

Patch based on work by Dengke Du <dengke.du@windriver.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowget: treat 201,202,203 as success codes too. Closes 9211
Denys Vlasenko [Wed, 31 Aug 2016 11:28:53 +0000 (13:28 +0200)]
wget: treat 201,202,203 as success codes too. Closes 9211

This matches "standard" wget.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosha3sum: fix config text (it's no longer only 512-bit)
Denys Vlasenko [Mon, 29 Aug 2016 13:20:15 +0000 (15:20 +0200)]
sha3sum: fix config text (it's no longer only 512-bit)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosha3: fix to conform to final SHA3 padding standard, add -a BITS option
Denys Vlasenko [Mon, 29 Aug 2016 12:05:25 +0000 (14:05 +0200)]
sha3: fix to conform to final SHA3 padding standard, add -a BITS option

function                                             old     new   delta
hash_file                                            331     396     +65
md5_sha1_sum_main                                    485     538     +53
packed_usage                                       30423   30464     +41
sha3_begin                                            17      31     +14
sha3_hash                                            101     110      +9
sha3_end                                              41      49      +8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohexdump: fix numerous bugs in handling of backslashes
Denys Vlasenko [Fri, 26 Aug 2016 18:14:31 +0000 (20:14 +0200)]
hexdump: fix numerous bugs in handling of backslashes

Was:
t=48\\ t=45\\ t=4c\\ t=4c\\ t=4f\\ t=0a\\
Now:
=48=\n =45=\n =4c=\n =4c=\n =4f=\n =0a=\n

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoudhcpc: Unconditionally call deconfig script, not only if lease is active
Peter Korsgaard [Fri, 26 Aug 2016 16:46:34 +0000 (18:46 +0200)]
udhcpc: Unconditionally call deconfig script, not only if lease is active

The udhcpc script may be used to setup fallback configuration (E.G. IPv4LL,
fixed IP address, ..) that also needs to be cleaned up on release (E.G.
when SIGUSR2 is called or on shutdown with -R), so unconditionally call
deconfig.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agobuild system: always rewrite NUM_APPLETS.h
Denys Vlasenko [Tue, 23 Aug 2016 18:21:36 +0000 (20:21 +0200)]
build system: always rewrite NUM_APPLETS.h

Conditional rewrite can keep NUM_APPLETS.h mtime old,
this causes make to try to regenerate it at every invocation.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agofdisk: tweak some messages
Denys Vlasenko [Tue, 23 Aug 2016 15:18:45 +0000 (17:18 +0200)]
fdisk: tweak some messages

"Total allocated sectors 2021315 greater than the maximum 2020356"

maximum what?

Turns out, that's the CHS size of the disk.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agofdisk: print much less cryptic partition table
Denys Vlasenko [Tue, 23 Aug 2016 14:13:33 +0000 (16:13 +0200)]
fdisk: print much less cryptic partition table

Before:

   Device Boot      Start         End      Blocks  Id System
/dev/sdb1   *           1         998      255471+  6 FAT16

What are "blocks"? What is that "+"?
How big is this partition?
Is start/end shown came from LBA fields or CHS fields?
Why are we torturing the user??

After:

Device  Boot StartCHS    EndCHS        StartLBA     EndLBA    Sectors  Size Id Type
/dev/sdb1 *  0,1,1       996,15,32           32     510974     510943  249M  6 FAT16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoman: fix parsing of "DEFINE pager xyz". Closes 8976
Denys Vlasenko [Mon, 22 Aug 2016 19:41:05 +0000 (21:41 +0200)]
man: fix parsing of "DEFINE pager xyz". Closes 8976

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoinit: fix for FreeBSD console opening. Closes 9031
Denys Vlasenko [Mon, 22 Aug 2016 18:56:58 +0000 (20:56 +0200)]
init: fix for FreeBSD console opening. Closes 9031

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agounshare: --network should be --net. Closes 9116
Denys Vlasenko [Mon, 22 Aug 2016 18:19:34 +0000 (20:19 +0200)]
unshare: --network should be --net. Closes 9116

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agodocs: Update filenames in keep_data_small.txt
Kang-Che Sung [Wed, 3 Aug 2016 06:14:04 +0000 (14:14 +0800)]
docs: Update filenames in keep_data_small.txt

The filenames in docs/keep_data_small.txt are a little bit outdated.
It's better to change it to the current name.

decompress_unzip.c -> decompress_gunzip.c
(since commit 774bce8e8ba1e424c953e8f13aee8f0778c8a911)
libbb/messages.c -> libbb/ptr_to_globals.c
(since commit 574f2f43948bb21d6e4187936ba5a5afccba25f6)

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix "redirects can close script fd" bug
Denys Vlasenko [Mon, 22 Aug 2016 17:54:12 +0000 (19:54 +0200)]
hush: fix "redirects can close script fd" bug

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agobuild system: different fix for include/applet_tables.h/include/NUM_APPLETS.h
Denys Vlasenko [Sun, 21 Aug 2016 20:00:20 +0000 (22:00 +0200)]
build system: different fix for include/applet_tables.h/include/NUM_APPLETS.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowget/ssl_helper: update to wolfssl-3.9.8
Denys Vlasenko [Sun, 21 Aug 2016 01:39:39 +0000 (03:39 +0200)]
wget/ssl_helper: update to wolfssl-3.9.8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: do not leak script fds into NOEXEC children
Denys Vlasenko [Sat, 20 Aug 2016 13:58:34 +0000 (15:58 +0200)]
hush: do not leak script fds into NOEXEC children

We set all opened script fds to CLOEXEC, thus making then go away
after fork+exec.
Unfortunately, CLOFORK does not exist. NOEXEC children will still see those fds open.

For one, "ls" applet is NOEXEC. Therefore running "ls -l /proc/self/fd"
in a script from standalone shell shows this:

lrwx------    1 root     root            64 Aug 20 15:17 0 -> /dev/pts/3
lrwx------    1 root     root            64 Aug 20 15:17 1 -> /dev/pts/3
lrwx------    1 root     root            64 Aug 20 15:17 2 -> /dev/pts/3
lr-x------    1 root     root            64 Aug 20 15:17 3 -> /path/to/top/level/script
lr-x------    1 root     root            64 Aug 20 15:17 4 -> /path/to/sourced/SCRIPT1
...

with as many open fds as there are ". SCRIPTn" nest levels.
Fix it by closing these fds after fork (only for NOEXEC children).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: bit better comments in redirect code. No logic changes
Denys Vlasenko [Sat, 20 Aug 2016 13:16:00 +0000 (15:16 +0200)]
hush: bit better comments in redirect code. No logic changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: `cmd` and arithmetic also need the fix for FILE rewind
Denys Vlasenko [Fri, 19 Aug 2016 18:15:26 +0000 (20:15 +0200)]
hush: `cmd` and arithmetic also need the fix for FILE rewind

Discovered by running testsuite with a newest glibc

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix a bug in FEATURE_SH_STANDALONE=y config. Closes 9186
Denys Vlasenko [Fri, 19 Aug 2016 16:23:56 +0000 (18:23 +0200)]
hush: fix a bug in FEATURE_SH_STANDALONE=y config. Closes 9186

Run this in a "sh SCRIPT":

sha256sum /dev/null
echo END

sha256sum is a NOEXEC applet. It runs in a forked child. Then child exit()s.
By this time, entire script is read, and buffered in a FILE object
from fopen("SCRIPT"). But fgetc() did not consume entire input.
exit() lseeks back by -9 bytes, from <eof> to 'e' in 'echo'.
(this may be libc-specific).
This change of fd position *is shared with the parent*!

Now parent can read more, and it thinks there is another "echo END".
End result: two "echo END"s are run.

Fix this by _exit()ing instead.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotop: move free(prev_hist) out of signal path
Denys Vlasenko [Fri, 19 Aug 2016 09:07:31 +0000 (11:07 +0200)]
top: move free(prev_hist) out of signal path

It was seen being called recursively on repeated signals,
leading to double free

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoifplugd: if SIOCSIFFLAGS fails with ENODEV, don't die
Denys Vlasenko [Tue, 16 Aug 2016 18:39:52 +0000 (20:39 +0200)]
ifplugd: if SIOCSIFFLAGS fails with ENODEV, don't die

Some user managed to hit a race where iface is gone between SIOCGIFFLAGS
and SIOCSIFFLAGS (!). If SIOCSIFFLAGS fails, treat it the same as failed
SIOCGIFFLAGS

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoless: fix bracket search to match behavior of less 481
Denys Vlasenko [Tue, 16 Aug 2016 13:27:30 +0000 (15:27 +0200)]
less: fix bracket search to match behavior of less 481

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoless: fix SEGV
Denys Vlasenko [Tue, 16 Aug 2016 13:09:40 +0000 (15:09 +0200)]
less: fix SEGV

testcase: echo "" | less, then press ')' key

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agogzip: add test that checks that -9 compresses better than -1
Natanael Copa [Wed, 3 Aug 2016 14:21:53 +0000 (16:21 +0200)]
gzip: add test that checks that -9 compresses better than -1

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agogzip: fix compression level bug. Closes 9131
Natanael Copa [Wed, 3 Aug 2016 14:21:52 +0000 (16:21 +0200)]
gzip: fix compression level bug. Closes 9131

fix broken logic to get the gzip_level_config value from options -1 to
-9.

This fixes an off-by-one bug that caused gzip -9 output bigger files
than the other compression levels.

It fixes so that compression level 1 to 3 are actually mapped to level 4
as comments say.

It also fixes that levels -4 to -9 is mapped to correct level and avoids
out-of-bounds access.

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolineedit: trivial codeshrink for vi-mode
Natanael Copa [Sun, 14 Aug 2016 21:30:29 +0000 (23:30 +0200)]
lineedit: trivial codeshrink for vi-mode

Introduce and use BB_isalnum_or_underscore().

function                                             old     new   delta
BB_isalnum_or_underscore                               -      43     +43
vi_word_motion                                       162     150     -12
vi_end_motion                                        163     145     -18
vi_back_motion                                       198     179     -19
BB_isalnum                                            39       -     -39
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/3 up/down: 43/-88)            Total: -45 bytes

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agobuild system: fix include/NUM_APPLETS.h generation
Denys Vlasenko [Sun, 14 Aug 2016 00:54:27 +0000 (02:54 +0200)]
build system: fix include/NUM_APPLETS.h generation

TBH, it's more like "work around my bad makefile-fu" than "fix"...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibiproute: eliminate some redundant zero stores
Denys Vlasenko [Sun, 14 Aug 2016 00:08:56 +0000 (02:08 +0200)]
libiproute: eliminate some redundant zero stores

function                                             old     new   delta
do_iprule                                            974     955     -19
rtnl_dump_request                                    173     146     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-46)             Total: -46 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoip: fix an improper optimization: req.r.rtm_scope may be nonzero here
Denys Vlasenko [Sat, 13 Aug 2016 23:30:34 +0000 (01:30 +0200)]
ip: fix an improper optimization: req.r.rtm_scope may be nonzero here

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agocp: fix -i for POSIX mode. Closes 9106
Denys Vlasenko [Sat, 13 Aug 2016 21:23:48 +0000 (23:23 +0200)]
cp: fix -i for POSIX mode. Closes 9106

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agontpd: respond only to client and symmetric active packets
Miroslav Lichvar [Mon, 1 Aug 2016 18:24:24 +0000 (20:24 +0200)]
ntpd: respond only to client and symmetric active packets

The busybox NTP implementation doesn't check the NTP mode of packets
received on the server port and responds to any packet with the right
size. This includes responses from another NTP server. An attacker can
send a packet with a spoofed source address in order to create an
infinite loop of responses between two busybox NTP servers. Adding
more packets to the loop increases the traffic between the servers
until one of them has a fully loaded CPU and/or network.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoservice/fw example: do not ruin $if[], use different name
Denys Vlasenko [Sat, 30 Jul 2016 20:29:10 +0000 (22:29 +0200)]
service/fw example: do not ruin $if[], use different name

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowget: run s_client helper with -servername HOST
Denys Vlasenko [Mon, 25 Jul 2016 19:34:57 +0000 (21:34 +0200)]
wget: run s_client helper with -servername HOST

This is necessary for multi-hosted TLSed web sites.

function                                             old     new   delta
spawn_https_helper_openssl                           334     441    +107

Based on a patch by Jeremy Chadwick <jdc@koitsu.org>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agossl_helper.sh: strip was invoked incorrectly
Denys Vlasenko [Mon, 25 Jul 2016 15:12:46 +0000 (17:12 +0200)]
ssl_helper.sh: strip was invoked incorrectly

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agovar_service/fw: optionally flush all netdevs; optionally prefer one 0/0 routing
Denys Vlasenko [Mon, 25 Jul 2016 14:28:57 +0000 (16:28 +0200)]
var_service/fw: optionally flush all netdevs; optionally prefer one 0/0 routing

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix handling of ${VAR: -2}
Denys Vlasenko [Mon, 25 Jul 2016 01:56:00 +0000 (03:56 +0200)]
ash: fix handling of ${VAR: -2}

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoconfig: disentangle PREFER_APPLETS from SH_STANDALONE and SH_NOFORK
Denys Vlasenko [Fri, 22 Jul 2016 16:48:38 +0000 (18:48 +0200)]
config: disentangle PREFER_APPLETS from SH_STANDALONE and SH_NOFORK

On user request.
I thought enabling/disabling them all together is more consistent.
Evidently, some people do want them to be separately selectable.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix a possible bug
Denys Vlasenko [Thu, 21 Jul 2016 12:40:08 +0000 (14:40 +0200)]
hush: fix a possible bug

Not sure this was actually a triggerable bug, but the code looked flaky.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotypo fixes
Denys Vlasenko [Tue, 19 Jul 2016 15:48:55 +0000 (17:48 +0200)]
typo fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: do not leave SIGQUIT ignored on "exec CMD"
Denys Vlasenko [Sat, 16 Jul 2016 16:33:55 +0000 (18:33 +0200)]
ash: do not leave SIGQUIT ignored on "exec CMD"

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agocp: make verbose cp show symlink copies too
Denys Vlasenko [Thu, 14 Jul 2016 18:58:39 +0000 (20:58 +0200)]
cp: make verbose cp show symlink copies too

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosendmail: include -H and -S in short help text
Denys Vlasenko [Thu, 14 Jul 2016 18:06:44 +0000 (20:06 +0200)]
sendmail: include -H and -S in short help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosendmail: improve help text
Denys Vlasenko [Thu, 14 Jul 2016 17:14:54 +0000 (19:14 +0200)]
sendmail: improve help text

* explain which server we contact by default
* explain when auth is done
* -t is not implied! remove that from help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotrylink: use "mktemp tmp.XXXXXXXXXX" to placate OS X
Denys Vlasenko [Tue, 12 Jul 2016 11:54:35 +0000 (13:54 +0200)]
trylink: use "mktemp tmp.XXXXXXXXXX" to placate OS X

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years ago{md5,shaN}sum: make -c EMPTY fail
Denys Vlasenko [Mon, 11 Jul 2016 17:51:08 +0000 (19:51 +0200)]
{md5,shaN}sum: make -c EMPTY fail

function                                             old     new   delta
md5_sha1_sum_main                                    466     485     +19

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples: add a useful "see abridged log" script for ntpd service example
Denys Vlasenko [Sun, 10 Jul 2016 18:15:28 +0000 (20:15 +0200)]
examples: add a useful "see abridged log" script for ntpd service example

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agocpio: tweak help text
Denys Vlasenko [Fri, 8 Jul 2016 10:52:24 +0000 (12:52 +0200)]
cpio: tweak help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agogetopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST
Denys Vlasenko [Wed, 6 Jul 2016 19:58:02 +0000 (21:58 +0200)]
getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST

In many cases, this aqllows to drop use of opt_complementary.
Approximately -400 bytes:

function                                             old     new   delta
getopt32                                            1423    1502     +79
opt_string                                            17      18      +1
OPT_STR                                               24      25      +1
uniq_main                                            416     406     -10
timeout_main                                         279     269     -10
sulogin_main                                         270     260     -10
readprofile_main                                    1825    1815     -10
ps_main                                              543     533     -10
pidof_main                                           245     235     -10
pgrep_main                                           611     601     -10
od_main                                             2600    2590     -10
mkfs_minix_main                                     2684    2674     -10
mkfs_ext2_main                                      2603    2593     -10
microcom_main                                        712     702     -10
makemime_main                                        315     305     -10
ionice_main                                          282     272     -10
inetd_main                                          2074    2064     -10
ifplugd_main                                        1144    1134     -10
halt_main                                            353     343     -10
getopt_main                                          636     626     -10
fdisk_main                                          2854    2844     -10
env_main                                             206     196     -10
dmesg_main                                           319     309     -10
conspy_main                                         1214    1204     -10
awk_main                                             981     971     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220)         Total: -139 bytes
   text    data     bss     dec     hex filename
 919373     906   14060  934339   e41c3 busybox_old
 918969     906   14060  933935   e402f busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowhois: implement -i
Denys Vlasenko [Wed, 6 Jul 2016 15:16:27 +0000 (17:16 +0200)]
whois: implement -i

function                                             old     new   delta
whois_main                                           654     675     +21
packed_usage                                       30355   30356      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowhois: make it actually work
Denys Vlasenko [Wed, 6 Jul 2016 13:45:41 +0000 (15:45 +0200)]
whois: make it actually work

It was doing way too simplistic work of just querying the server,
no redirects, no query massaging. This required user to know a lot about whois,
and enter at least three queries for each host to get meaningful information.

function                                             old     new   delta
whois_main                                           209     646    +437

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agobuild system: fix a few warnings for allnoconfig build
Denys Vlasenko [Tue, 5 Jul 2016 19:43:28 +0000 (21:43 +0200)]
build system: fix a few warnings for allnoconfig build

Not that allnoconfig build is useful in any way...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolibbb: suppress warning about run_applet_and_exit
Ron Yorston [Tue, 5 Jul 2016 13:07:50 +0000 (14:07 +0100)]
libbb: suppress warning about run_applet_and_exit

When busybox is configured to contain a single applet an unnecessary
declaration of run_applet_and_exit results in a warning.  Move the
declaration to avoid this.

Reported-by: Lauri Kasanen <curaga@operamail.com>
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoarp: fix buffer overflow. Closes 9071
Denys Vlasenko [Mon, 4 Jul 2016 15:38:01 +0000 (17:38 +0200)]
arp: fix buffer overflow. Closes 9071

function                                             old     new   delta
arp_main                                            1910    1898     -12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoudhcpc: run "deconfig" script in manual renew state too. closes 9061
Denys Vlasenko [Sun, 3 Jul 2016 18:26:44 +0000 (20:26 +0200)]
udhcpc: run "deconfig" script in manual renew state too. closes 9061

The bug was seen when the following is done:

    # killall 1 udhpc; killall 2 udhpc

Performing a DHCP renew
state: 2 -> 5
Sending renew...
Entering released state
state: 5 -> 6  <<<<<<<<<<<<<< not calling script!!!!

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agontpd: daemonize before DNS resolution
Denys Vlasenko [Sun, 3 Jul 2016 15:58:54 +0000 (17:58 +0200)]
ntpd: daemonize before DNS resolution

This resolves the following use case problem:

"I start ntpd by default from /etc/init.d

There might be no working network connection (not configured properly for
whatever reason, hardware problems, whatelse).

With busybox 1.25 ntpd seems to loop forever if now NTP servers are found,
blocking the boot process  and I never get a login to solve a possible pb or
to do a first time configuration."

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agobuild system: make CONFIG_FEATURE_USE_BSS_TAIL less funky
Denys Vlasenko [Wed, 29 Jun 2016 13:00:52 +0000 (15:00 +0200)]
build system: make CONFIG_FEATURE_USE_BSS_TAIL less funky

CONFIG_FEATURE_USE_BSS_TAIL code was aliasing bb_common_bufsiz1 to _end.
This is unreliable: _end may be not sufficiently aligned.

Change code to simply enlarge COMMON_BUFSIZE when we detect that _end
has significant amount of space to the end of page.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agodf: use f_frsize instead of f_bsize for correct sizes
Natanael Copa [Thu, 23 Jun 2016 08:42:40 +0000 (10:42 +0200)]
df: use f_frsize instead of f_bsize for correct sizes

Use the correct field f_frsize instead of f_bsize.

The statfs f_bsize is the "Optimal transfer block size" while the
f_frsize is the "Fragment size (since Linux 2.6)". On some FUSE
filesystems those may differ.

Fixes bug 9046

URL: https://bugs.busybox.net/show_bug.cgi?id=9046

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoi2cdump: don't use common_bufsiz1
Bartosz Golaszewski [Thu, 23 Jun 2016 15:19:50 +0000 (17:19 +0200)]
i2cdump: don't use common_bufsiz1

Commit e6a2f4cc changed the way common_bufsiz1 works. Now it needs to
be initialized before using, but i2cdump wasn't updated by said patch.

Since the fact that we're using common_bufsiz1 here isn't obvious (no
G_INIT() macro, no other global variables), drop it and simply
allocate the integer array required for block reads on the stack.

Tested with i2c block read on a Lenovo Thinkpad laptop.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoping: populate icmp_id field for "simple" ping too
Jonas Danielsson [Thu, 23 Jun 2016 16:26:32 +0000 (18:26 +0200)]
ping: populate icmp_id field for "simple" ping too

The ICMP RFC says that identifier and sequence number may be zero.
Having them zero for a Echo message, along with a data of zero's
as well will result in a Echo reply message with only zero's.

Some NAT implementations seem to get the checksum wrong on these
packages. Setting a checksum of 0x0 instead of 0xffff.

Through NAT:
  Internet Control Message Protocol
      Type: 0 (Echo (ping) reply)
      Code: 0
      Checksum: 0x0000 [incorrect, should be 0xffff]
      Identifier (BE): 0 (0x0000)
      Identifier (LE): 0 (0x0000)
      Sequence number (BE): 0 (0x0000)
      Sequence number (LE): 0 (0x0000)
      Data (56 bytes)
          Data: 000000000000000000000000000000000000000000000000...
          [Length: 56]

Without NAT:
  Internet Control Message Protocol
      Type: 0 (Echo (ping) reply)
      Code: 0
      Checksum: 0xffff [correct]
      Identifier (BE): 0 (0x0000)
      Identifier (LE): 0 (0x0000)
      Sequence number (BE): 0 (0x0000)
      Sequence number (LE): 0 (0x0000)
      [Request frame: 189]
      [Response time: 0.024 ms]
      Data (56 bytes)
          Data: 000000000000000000000000000000000000000000000000...
          [Length: 56]

And this in turn will make some hardware MAC checksum offloading
engines drop the packet.

(This was seen with a Synopsis MAC, the same one used in for instance the
stmmac Ethernet driver in the linux kernel.)

This change can be seen as a workaround for bugs in other layers.
But just setting an identifier for the Echo message packet will
avoid prodding the hornets nest.

function                                             old     new   delta
common_ping_main                                     424     500     +76

Signed-off-by: Jonas Danielsson <jonasdn@axis.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoStart 1.26.0 development cycle
Denys Vlasenko [Wed, 22 Jun 2016 01:10:21 +0000 (03:10 +0200)]
Start 1.26.0 development cycle

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoBump version to 1.25.0 1_25_0
Denys Vlasenko [Mon, 20 Jun 2016 22:15:49 +0000 (00:15 +0200)]
Bump version to 1.25.0

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>