Under some circumstances, a DNS reply might contain no resource records,
e.g. when a valid domain is queried that does not have records of the
requested type.
Example with nslookup from BIND dnsutils:
$ nslookup -q=SRV example.org
Server: 10.11.12.13
Address: 10.11.12.13#53
Non-authoritative answer:
*** Can't find example.org: No answer
Currently the busybox nslookup applet simply prints nothing after the
"Non-authoritative answer:" line in the same situation.
This change modifies nslookup to either print "Parse error" or "No answer"
diagnostics, depending on the parse_reply() return value.
function old new delta
send_queries 1676 1711 +35
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
> I'm trying to connect to a Korenix 3005 switch through telnet
> for management purposes, and all is well except for the backspace character
> - seems like my switch doesn't handle it too well and instead of erasing
> the last character all it does is print some garbage to the screen.
> I've had the same issue before while using putty, but saw a solution that
> suggests to enable "Telnet special commands" in the options menu, and it
> worked.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The following caused udhcpc to segfault:
busybox udhcpc -i lo -s /dev/null -x 0x3d:
function old new delta
udhcp_str2optset 629 641 +12
Signed-off-by: Michal Kazior <michal@plume.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The output of the command "route -n -A inet6" may be corrupted
due to partially initialized structure snaddr6 in the function
INET6_displayroutes.
Signed-off-by: Tomas Paukrt <tomaspaukrt@email.cz>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Some hosting services like sourceforge perform a lot of relocations
before actually serving the file. Example of current limitation:
busybox wget http://sourceforge.net/projects/fluxbox/files/fluxbox/1.3.7/fluxbox-1.3.7.tar.xz
Connecting to sourceforge.net (216.105.38.13:80)
Connecting to sourceforge.net (216.105.38.13:443)
Connecting to sourceforge.net (216.105.38.13:443)
Connecting to sourceforge.net (216.105.38.13:443)
Connecting to downloads.sourceforge.net (216.105.38.13:443)
wget: too many redirections
Signed-off-by: David Demelier <markand@malikania.fr>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Back in 2007, commit 0c97c9d437 ("'simple' error message functions by
Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower
overhead call to bb_perror_msg() when only a string was being printed
with no parameters. This saves space for some CPU architectures because
it avoids the overhead of a call to a variadic function. However there
has never been a simple version of bb_error_msg(), and since 2007 many
new calls to bb_perror_msg() have been added that only take a single
parameter and so could have been using bb_simple_perror_message().
This changeset introduces 'simple' versions of bb_info_msg(),
bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and
bb_herror_msg_and_die(), and replaces all calls that only take a
single parameter, or use something like ("%s", arg), with calls to the
corresponding 'simple' version.
Since it is likely that single parameter calls to the variadic functions
may be accidentally reintroduced in the future a new debugging config
option WARN_SIMPLE_MSG has been introduced. This uses some macro magic
which will cause any such calls to generate a warning, but this is
turned off by default to avoid use of the unpleasant macros in normal
circumstances.
This is a large changeset due to the number of calls that have been
replaced. The only files that contain changes other than simple
substitution of function calls are libbb.h, libbb/herror_msg.c,
libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c,
networking/udhcp/common.h and util-linux/mdev.c additonal macros have
been added for logging so that single parameter and multiple parameter
logging variants exist.
The amount of space saved varies considerably by architecture, and was
found to be as follows (for 'defconfig' using GCC 7.4):
Arm: -92 bytes
MIPS: -52 bytes
PPC: -1836 bytes
x86_64: -938 bytes
Note that for the MIPS architecture only an exception had to be made
disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h)
because it made these files larger on MIPS.
Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Resolved a TODO by adding support for gateway_nip parameter.
function old new delta
udhcp_run_script 792 835 +43
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The result of looking at "grep -F -B2 '*fill*' busybox_unstripped.map"
text data bss dec hex filename
952537 485 7296 960318 ea73e busybox_old
952527 485 7296 960308 ea734 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
gcc accepts
__asm__ ( "" : : : "%cc");
but cc is not a real register and clang does not like it.
networking/tls_pstm_montgomery_reduce.c:385:4: error: unknown register name '%cc' in asm
| INNERMUL;
| ^
The % syntax nominally goes before a register, in this case cc,
like "memory" isn't a true register it's just a way of specifying that
the condition code registers for the target are clobbered
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Between Busybox 1.24.2 and 1.25.0 the bb_info_msg() function was
eliminated and calls to it changed to be bb_error_msg(). The downside of
this is that daemons now log all messages to syslog at the LOG_ERR level
which makes it hard to filter errors from informational messages.
This change optionally re-introduces bb_info_msg(), controlled by a new
option FEATURE_SYSLOG_INFO, restores all the calls to bb_info_msg() that
were removed (only in applets that set logmode to LOGMODE_SYSLOG or
LOGMODE_BOTH), and also changes informational messages in ifplugd and
ntpd.
The code size change of this is as follows (using 'defconfig' on x86_64
with gcc 7.3.0-27ubuntu1~18.04)
function old new delta
bb_info_msg - 182 +182
bb_vinfo_msg - 27 +27
static.log7 194 198 +4
log8 190 191 +1
log5 190 191 +1
crondlog 45 - -45
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 3/0 up/down: 215/-45) Total: 170 bytes
If you don't care about everything being logged at LOG_ERR level
then when FEATURE_SYSLOG_INFO is disabled Busybox actually gets smaller:
function old new delta
static.log7 194 200 +6
log8 190 193 +3
log5 190 193 +3
syslog_level 1 - -1
bb_verror_msg 583 581 -2
crondlog 45 - -45
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 3/1 up/down: 12/-48) Total: -36 bytes
Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Pass the Authorization header to CGI if not of type Basic. This will
make it possible for CGI to verify authorization headers of type
Bearer <token>.
function old new delta
handle_incoming_and_exit 2370 2379 +9
Signed-off-by: Alexander Vickberg <wickbergster@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Today for gzipped content httpd is using a header with name
Transfer-Length. However I can't find a header with that name in the
standards. Instead use Content-Length.
function old new delta
.rodata 157940 157936 -4
send_headers 980 939 -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-45) Total: -45 bytes
Signed-off-by: Alexander Vickberg <wickbergster@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Set up environment variables before running the CGI script.
The variables will be named HTTP_<filtered_name> where the <filtered_name>
is the header name capitalized and all characters not matching
[a-z] | [A-Z] | [0-9] replaced with '_'.
function old new delta
http_response 80 88 +8
http_response_type 20 22 +2
send_headers 718 715 -3
parse_conf 1481 1478 -3
get_line 128 110 -18
cgi_io_loop_and_exit 599 569 -30
send_cgi_and_exit 882 738 -144
handle_incoming_and_exit 2793 2592 -201
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/6 up/down: 10/-399) Total: -389 bytes
text data bss dec hex filename
982178 485 7296 989959 f1b07 busybox_old
981675 485 7296 989456 f1910 busybox_unstripped
Signed-off-by: Alexander Vickberg <wickbergster@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The proxying is documented as follows:
P:/url:[http://]hostname[:port]/new/path
Howeverm urlcopy is not a true copy anymore when it is fdprint'ed
to proxy_fd, this is because percent_decode_in_place() is called
after the copy is created.
This breaks reverse proxying all URIs containing percent
encoded spaces, e.g. - because a decoded URI will be printed out
to proxy_fd instead of the original.
The fix keeps the logic in place to canonicalize the uri first,
before reverse proxying (one could argue that the uri
should be proxied completely unaltered, except for the prefix
rewrite).
function old new delta
handle_incoming_and_exit 2752 2792 +40
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Support for the IEEE timezone string and timezone database strings (100
and 101 options respectively) is added for ipv4, conforming to RFC-4833.
The two options are passed to hook scripts in the variables tzstr and
tzdbstr.
function old new delta
dhcp_option_strings 280 294 +14
dhcp_optflags 76 80 +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 18/0) Total: 18 bytes
Signed-off-by: Antoine Girard-Vallée <antoine.girard-vallee@savoirfairelinux.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
ipaddress.c: In function ‘ipaddr_list_or_flush’:
ipaddress.c:427:6: warning: variable ‘no_link’ set but not used [-Wunused-but-set-variable]
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Fixed a TODO in AYT IAC handling by replying back with a NOP.
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Commit db169f2538 breaks the "ip -o link"
command, no output is displayed.. Fix by only excluding the link info if
in oneline mode and if the address family is not AF_PACKET.
function old new delta
ipaddr_list_or_flush 1232 1202 -30
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Currently, running "udhcpc -n -b" causes udhcpc to go to background and
then exit after some time unless a lease is obtained.
It's not very useful to do so
as the calling process doesn't know
if the lease was obtained or not anyway.
The code actually tries to favor "-b" over "-n",
but doesn't clear "-n" flag while clearing "-b" after backgrounding.
So, clear "-n" flag after going into background.
This effectively makes "-b" override "-n" completely
and "-n -b" behave the same as "-b".
This allows to override default "-n" option, passed to udhcpc by ifupdown,
without recompiling busybox.
URL: https://bugs.busybox.net/11691
Signed-off-by: Andrey Mazo <ahippo@yandex.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The proto has to be passed in network byte-order.
While at it allow for
ip link add link eth0 name eth0.2.24 type vlan proto 802.1ad id 24
ip link del link eth0 name eth0.2.24 type vlan proto 802.1ad id 24
The del was lacking a dev_str and thus errored out. Fix by using
name/dev counterpart as fallback.
The proto identifier 802.1Q was not recognized, just it's lowercase
variant, fix that too.
function old new delta
do_add_or_delete 1275 1376 +101
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 101/0) Total: 101 bytes
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
When printing notification on download start and end,
mistakenly, it didn't respect the quiet option
function old new delta
retrieve_file_data 561 579 +18
wget_main 2432 2437 +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 23/0) Total: 23 bytes
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The real telnet provides some feedback:
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
We should do this to, because people are sitting there and think
a firewall is dropping packets.
function old new delta
telnet_main 1270 1279 +9
Signed-off-by: Danijel Tasov <m@rbfh.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
When using -o to file the progress meter is not displayed, so write that
we started the download and that we finished it.
function old new delta
retrieve_file_data 465 561 +96
wget_main 2412 2432 +20
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 116/0) Total: 116 bytes
text data bss dec hex filename
979022 485 7296 986803 f0eb3 busybox_old
979224 485 7296 987005 f0f7d busybox_unstripped
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Add support for MD5 message authentication as described in RFC 5905.
This patch also supports SHA1 authentication.
The key file format is the same file format as used by ntpd.
The configuration file format follows standard Unix conventions
(# comments) with lines consist of the following fields separated by whitespace:
<key identifier, [1,65535]> <SHA1|MD5> <an ASCII string of up to 20 characters|an octet string [a-zA-F0-9] of up to 40 characters>.
https://www.ietf.org/rfc/rfc5905.txt
function old new delta
ntp_init 473 987 +514
hash - 125 +125
recv_and_process_peer_pkt 889 961 +72
packed_usage 33066 33130 +64
ntpd_main 1226 1277 +51
find_key_entry - 29 +29
add_peers 195 207 +12
recv_and_process_client_pkt 509 514 +5
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 6/0 up/down: 872/0) Total: 872 bytes
Signed-off-by: Brandon P. Enochs <enochs.brandon@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Support the "source-directory" stanza from ifupdown[1]. source-directory
will include all files in the named directory. Similar to the Busybox
version of the "source" stanza, this version of source-directory does
not currently support shell wildcards.
We only check that the stanza starts with "source-dir" as ifupdown does[2].
[1] https://manpages.debian.org/stretch/ifupdown/interfaces.5.en.html#INCLUDING_OTHER_FILES
[2] https://salsa.debian.org/debian/ifupdown/blob/0.8.33/config.c#L498
function old new delta
read_interfaces 1150 1241 +91
Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The caps were inconsistent: timeout to renew was capped at 20 seconds,
and any renews with timeout <= 60 seconds were forced to broadcast.
function old new delta
udhcpc_main 2683 2680 -3
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Managed to make ntpd on one of my machines to be stuck getting
"root distance too high" all the time, but log is not giving me
more informatin what exactly is happening...
function old new delta
select_and_cluster 1045 1095 +50
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
If fgets() returns incomplete string, we replace NUL with
'\n', and then trim() runs on a non-NUL-terminated buffer.
Prevent that.
While at it, bump buffer from 1k to 2k.
function old new delta
query 519 524 +5
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
On fast network, I've seen "delay:0.002000" shown for all packets,
thus completely losing information on what real delays are.
The new code is careful to not reject packets with tiny delays
if the delay "grows a lot" but is still tiny:
0.000009 is "much larger" than 0.000001 (nine times larger),
but is still very good small delay.
function old new delta
recv_and_process_peer_pkt 863 889 +26
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This means we'll start correcting frequency ~5 minutes after start,
not ~3.5 ones.
With previos settings I still often see largish ~0.7s initial offsets
only about 1/2 corrected before frequency correction kicks in,
resulting in ~200ppm "correction" which is then slowly undone.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The "fix fetching of https URLs with http proxy" commit
broke the usual http-to-https redirect:
$ wget http://busybox.net/downloads/busybox-1.29.0.tar.bz2
Connecting to busybox.net (140.211.167.122:80)
Connecting to busybox.net (140.211.167.122:443)
wget: server returned error: HTTP/1.1 400 Bad Request
Fixing...
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The syntax of public key certificates can be found in RFC 5280 section
4.1. The relevant part of the syntax is the following:
TBSCertificate ::= SEQUENCE {
version [0] EXPLICIT Version DEFAULT v1,
serialNumber CertificateSerialNumber,
... remaining fields omitted ...
}
The version field has a default value of v1. RFC 5280 section 4.1.2.1
says the following:
If only basic fields are present, the version SHOULD be 1 (the value
is omitted from the certificate as the default value); however, the
version MAY be 2 or 3.
To help detect if the version field is present or not, the type of the
version field has an explicit tag of [0]. Due to this tag, if the
version field is present, its encoding will have an identifier octet
that is distinct from that of the serialNumber field.
ITU-T X.690 specifies how a value of such a type should be encoded with
DER. There is a PDF of X.690 freely available from ITU-T. X.690 section
8.1.2 specifies the format of identifier octets which is the first
component of every encoded value. Identifier octets encode the tag of a
type. Bits 8 and 7 encode the tag class. Bit 6 will be 0 if the encoding
is primitive and 1 if the encoding is constructed. Bits 5 to 1 encode
the tag number.
X.690 section 8.14 specifies what the identifier octet should be for
explicitly tagged types. Section 8.14.3 says if implicit tagging is not
used, then the encoding shall be constructed. The version field uses
explicit tagging and not implicit tagging, so its encoding will be
constructed. This means bit 6 of the identifier octet should be 1.
X.690 section 8.14 and Annex A provide examples. Note from their
examples that the notation for tags could look like [APPLICATION 2]
where both the tag class and tag number are given. For this example, the
tag class is 1 (application) and the tag number is 2. For notation like
[0] where the tag class is omitted and only the tag number is given, the
tag class will be context-specific.
Putting this all together, the identifier octet for the DER encoding of
the version field should have a tag class of 2 (context-specific), bit 6
as 1 (constructed), and a tag number of 0.
Signed-off-by: Ivan Abrea <ivan@algosolutions.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Update QoS markers.
Use DSCP AF21 for interactive traffic. DSCP is defined in RFC2474.
Many modern equipment no longer support IPTOS.
Signed-off-by: Codarren Velvindron <codarren@hackers.mu>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This reverts "udhcpc: paranoia when using kernel UDP mode
for sending renew: server ID may be bogus".
Users complain that they do have servers behind routers
(with DHCP relays).
function old new delta
send_packet 168 166 -2
bcast_or_ucast 25 23 -2
udhcp_send_kernel_packet 301 295 -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-10) Total: -10 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Kconfig-language.txt was deleted in commit 4fa499a17b back in 2006.
Move to docs/ as suggested by Xabier Oneca:
http://lists.busybox.net/pipermail/busybox/2014-May/080914.html
Also update references to it everywhere.
Signed-off-by: Kartik Agaram <akkartik@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This is to avoid parsing garbage past packet's actual end.
Also const-ize params to a few functions.
function old new delta
d6_run_script_no_option - 12 +12
option_to_env 791 798 +7
d6_run_script 253 255 +2
perform_d6_release 95 93 -2
udhcpc6_main 2596 2592 -4
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/2 up/down: 21/-6) Total: 15 bytes
Signed-off-by: David Decotigny <ddecotig@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Add support for the PXELINUX options 209 ("ConfigFile") and 210
("PathPrefix") in the DHCPv6 client.
See also: RFC5071, "Dynamic Host Configuration Protocol Options Used by
PXELINUX".
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
