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2020-12-15udhcp: bind to device even for ucast packetsMichal Kazior
There are cases where binding to source IP and destination IP is insufficient to guarantee sane xmit netdev. One case where this can fail is when route-matching netdev carrier is down (cable unplugged, wifi disconnected), or the netdev is admin down. Then all the IP based bindings (bind() + connect()) will seemingly succeed but the actual packet can go out through a default gw path. Depending on the network this happens on it can create issues or false alarms. It can also leak some subnet info across networks that shouldn't be routed. As such better be safe than sorry and bind to a netdev to be sure it's used for xmit. function old new delta udhcp_send_kernel_packet 293 336 +43 send_packet 182 188 +6 bcast_or_ucast 37 43 +6 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 55/0) Total: 55 bytes Signed-off-by: Michal Kazior <michal@plume.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-30decrease paddign: gcc-9.3.1 slaps 32-byte alignment on arrays willy-nillyDenys Vlasenko
text data bss dec hex filename 1021988 559 5052 1027599 fae0f busybox_old 1021236 559 5052 1026847 fab1f busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-06avoid using strok - eliminates use of hidden global variableDenys Vlasenko
function old new delta udhcp_str2optset 616 650 +34 setpriv_main 950 975 +25 switch_root_main 688 706 +18 parse 958 970 +12 getopt_main 622 628 +6 parse_resolvconf 302 306 +4 mpstat_main 1139 1142 +3 static.p 4 - -4 cdcmd 717 702 -15 strtok 148 - -148 ------------------------------------------------------------------------------ (add/remove: 0/3 grow/shrink: 7/1 up/down: 102/-167) Total: -65 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01udhcp: remove struct packing attribute, eliminates gcc-9.xDenys Vlasenko
"error: taking address of packed member of 'struct ip_udp_dhcp_packet' may result in an unaligned pointer value" here: udhcp_dump_packet(&packet.data); and in other places. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01gcc-9.x warning fixesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-08-13build system: drop PLATFORM_LINUXRon Yorston
PLATFORM_LINUX is a hidden configuration option which is disabled by default and enabled at over a hundred locations for features that are deemed to be Linux specific. The only effect of PLATFORM_LINUX is to control compilation of libbb/match_fstype.c. This file is only needed by mount and umount. Remove all references to PLATFORM_LINUX and compile match_fstype.c if mount or umount is enabled. Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-08-13udhcpc: add support for long optionsMartin Lewis
Duplicate options are currently overridden (only the last option is kept). This leads to unexpected behavior when using long options. The patch adds support for long options in compliance with RFC 3396. Fixes #13136. function old new delta udhcp_run_script 601 725 +124 optitem_unset_env_and_free - 38 +38 putenvp 46 59 +13 static.xmalloc_optname_optval 718 717 -1 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 2/1 up/down: 175/-1) Total: 174 bytes Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-07-12domain_codec: optimize dname_dec and convert_dnameMartin Lewis
dname_dec: now iterates over the packet only once. convert_dname: remove redundant checks and code shrink. While testing I've noticed that some of the tests didn't compile properly, so I fixed them. function old new delta dname_dec 286 267 -19 dname_enc 166 143 -23 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-42) Total: -42 bytes Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-29udhcpc: fix a TODO in fill_envp using option scannerMartin Lewis
fill_envp now iterates over the packet only once instead of a few hundred times using the new option scanner. function old new delta udhcp_scan_options - 189 +189 putenvp - 46 +46 init_scan_state - 22 +22 udhcp_get_option 227 104 -123 udhcp_run_script 835 601 -234 ------------------------------------------------------------------------------ (add/remove: 3/0 grow/shrink: 0/2 up/down: 257/-357) Total: -100 bytes Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-29udhcp: add option scannerMartin Lewis
Added an option scanner to udhcp to enable iteration over packet options. Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-29acpid: only display -p if supported in usageNorbert Lange
Signed-off-by: Norbert Lange <nolange79@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-29dhcpd: remove hardcoded pidfile pathNorbert Lange
Signed-off-by: Norbert Lange <nolange79@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-21udhcpc6: use correct multicast MACUwe Glaeser
function old new delta static.MAC_DHCP6MCAST_ADDR - 6 +6 Signed-off-by: Uwe Glaeser <uwe.glaeser@dormakaba.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09dhcpc: refactor xmalloc_optname_optval to shrink binary sizeMartin Lewis
function old new delta len_of_option_as_string 14 13 -1 dhcp_option_lengths 14 13 -1 udhcp_str2optset 641 637 -4 static.xmalloc_optname_optval 777 718 -59 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-65) Total: -65 bytes Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09udhcp: comment out unused domain compression codeDenys Vlasenko
function old new delta attach_option 411 406 -5 dname_enc 381 167 -214 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-219) Total: -219 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09dhcpc: code shrink in good_hostnameMartin Lewis
Incorporated valid_domain_label into good_hostname to simplify the implementation. function old new delta static.xmalloc_optname_optval 973 958 -15 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-15) Total: -15 bytes text data bss dec hex filename 993144 16915 1872 1011931 f70db busybox_old 993129 16915 1872 1011916 f70cc busybox_unstripped Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-01-14udhcpd: mangle hostnames starting with dash ("-option")Denys Vlasenko
function old new delta add_lease 316 328 +12 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-08udhcpc: fix segmentation fault on empty bin optMichal Kazior
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>
2019-09-24udhcpc6: add ELAPSED_TIME option to outgoing packetsDenys Vlasenko
function old new delta init_d6_packet 53 121 +68 udhcpc_main 2577 2582 +5 udhcpc6_main 2593 2597 +4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 77/0) Total: 77 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-08-24udhcpc6: support stateless DHCPv6Eivind Versvik
-l will send Information-Request to request configuration parameters function old new delta packed_usage 33114 33180 +66 send_d6_info_request - 62 +62 udhcpc6_main 2534 2593 +59 udhcpc6_longopts 199 211 +12 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 3/0 up/down: 199/0) Total: 199 bytes Signed-off-by: Eivind Versvik <versvikeivind@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-08-09udhcpc6: s/iphdr/ip6_hdr/Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02libbb: reduce the overhead of single parameter bb_error_msg() callsJames Byrne
Back in 2007, commit 0c97c9d43707 ("'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>
2019-06-13udhcpc: fix comment, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-11udhcpc6: fix aliasing warningDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-11dhcpc.c: Added support for relay server parameter.Martin Lewis
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>
2019-05-31dhcp: downgrade "got raw socket fd" message to log3, make log2 default maxDenys Vlasenko
log3 messages are very much redundant function old new delta change_listen_mode 322 302 -20 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-31dhcp: get rid of static data signal_pipeDenys Vlasenko
function old new delta udhcp_sp_setup 65 110 +45 udhcp_sp_fd_set 60 59 -1 udhcpd_main 1442 1437 -5 udhcpc_main 2684 2679 -5 signal_pipe 8 - -8 packed_usage 33292 33284 -8 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/4 up/down: 45/-27) Total: 18 bytes text data bss dec hex filename 952746 481 7296 960523 ea80b busybox_old 952768 481 7288 960537 ea819 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-30udhcp: rename server_config to server_dataDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-26udhcp: rename client_config to client_data, server_config to server_dataDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-26udhcpc6: Fixed aliasing compilation errorMartin Lewis
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-26dhcp: get rid of last global dataDenys Vlasenko
function old new delta udhcpc_main 2680 2684 +4 state 1 - -1 listen_mode 1 - -1 sockfd 4 - -4 ------------------------------------------------------------------------------ (add/remove: 0/3 grow/shrink: 1/0 up/down: 4/-6) Total: -2 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-23dhcp: tweak comments, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-21udhcpd: fix printing of static leasesDenys Vlasenko
function old new delta read_staticlease 299 282 -17 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-16udhcpd: code shrinkDenys Vlasenko
function old new delta send_packet_verbose - 35 +35 send_offer 443 423 -20 send_ACK 152 131 -21 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/2 up/down: 35/-41) Total: -6 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-16udhcpd: support per-client hostnames in static leasesDenys Vlasenko
function old new delta read_staticlease 222 299 +77 add_server_options 92 154 +62 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 139/0) Total: 139 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-15udhcpc6: unbreakDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-15udhcpd: code shrink - do not fetch requested IP twiceDenys Vlasenko
function old new delta send_offer 444 443 -1 udhcpd_main 1454 1442 -12 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-13) Total: -13 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-14style fix, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-10udhcpd: code shrinkDenys Vlasenko
function old new delta is_nip_reserved_as_static - 28 +28 get_static_nip_by_mac 43 47 +4 udhcpd_main 1459 1454 -5 send_offer 449 444 -5 read_leases 309 299 -10 is_nip_reserved 20 - -20 packed_usage 33283 33243 -40 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 1/4 up/down: 32/-80) Total: -48 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-30Optionally re-introduce bb_info_msg()James Byrne
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>
2019-04-14udhcpc6: code shrinkDenys Vlasenko
function old new delta d6_read_interface 593 582 -11 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-13udhcpc6: add a few comments, no code changes.Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-13udhcpc6: make it enabled in defconfigDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-13udhcp: add 100 and 101 dhcp options for ipv4Antoine Girard-Vallée
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>
2019-02-27udhcpc: don't exit after backgrounding on -n -bAndrey Mazo
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>
2019-02-27udhcpc: tweak --helpDenys Vlasenko
function old new delta packed_usage 33324 33315 -9 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-15Update examples/udhcp/udhcpd.confDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-07udhcpc: when decoding DHCP_SUBNET, ensure it is 4 bytes longDenys Vlasenko
function old new delta udhcp_run_script 795 801 +6 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-07udhcp: code shrinkDenys Vlasenko
function old new delta attach_option 406 349 -57 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-28config: add size information for three more appletsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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