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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>
2018-12-28config: add size information for udhcpcDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-28config: update size informationDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-27randomconfig fixesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17udhcpc: check that 4-byte options are indeed 4-byte, closes 11506Denys Vlasenko
function old new delta udhcp_get_option32 - 27 +27 udhcp_get_option 231 248 +17 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 44/0) Total: 44 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-03udhcpc: code shrinkDenys Vlasenko
function old new delta perform_release 112 172 +60 send_release 81 - -81 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/0 up/down: 60/-81) Total: -21 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-10-30udhcpc: ensure at least one unicast renew attemptDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-28udhcpc: give SIGUSR1-induced renew one chance of unicast renewDenys Vlasenko
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>
2018-08-01udhcpc: add a cooment about sanitizing DHCP_DOMAIN_NAME, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-08-01udhcpc: do in fact not allow hostname components which start with dashDenys Vlasenko
function old new delta xmalloc_optname_optval 879 893 +14 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-04udhcp: add decimal option values in comments, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-04udhcp: tweak comment indentation, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-04udhcp: add option 211, "reboot time"Jeremy Kerr
As defined in RFC 5071. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-06-21udhcpc: remove code which requires server ID to be on local networkDenys Vlasenko
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>
2018-06-06restore documentation on the build config languageKartik Agaram
Kconfig-language.txt was deleted in commit 4fa499a17b52b 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>
2018-05-24udhcpc6: carry along length of packet when parsing it.David Decotigny
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>
2018-05-24udhcpc6: ignore invalid OPTION_IAADDRDavid Decotigny
Signed-off-by: David Decotigny <ddecotig@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-05-14udhcpc6: set -x options in requestDenys Vlasenko
Last foru commits: function old new delta option_to_env 621 791 +170 .rodata 168351 168505 +154 attach_option 431 506 +75 add_d6_client_options 112 167 +55 d6_option_strings 30 84 +54 udhcp_str2optset 644 660 +16 d6_optflags 12 20 +8 udhcpc6_main 2590 2596 +6 udhcpc_main 2648 2651 +3 read_optset 15 18 +3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 10/0 up/down: 544/0) Total: 544 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-05-14udhcpc6: add PXELINUX optionsSamuel Mendoza-Jonas
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>
2018-05-14udhcpc6: add DHCPv6 boot optionsSamuel Mendoza-Jonas
Add support for 'bootfile-url' and 'bootfile-params' as defined by RFC5970 "DHCPv6 Options for Network Boot". Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-05-14udhcpc6: add DHCPv6 env helperSamuel Mendoza-Jonas
Add string_option_to_env() to easily generate environment variables for known simple options. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-05-14udhcp: fix use of trim() in udhcp_str2optset()Samuel Mendoza-Jonas
trim() modifies the string in place if needed and returns a pointer to the end of the resulting string. Update udhcp_str2optset() so it no longer sets the value of 'val' to the return value of trim(). Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-13udhcp: support string user options, closes 10946Denys Vlasenko
function old new delta udhcp_str2optset 536 628 +92 packed_usage 32757 32760 +3 udhcpc_main 2708 2692 -16 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 95/-16) Total: 79 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-27ioctl(SIOCGIFINDEX) does not require clearing of entire ifrDenys Vlasenko
function old new delta INET6_setroute 492 472 -20 do_iplink 1357 1330 -27 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-47) Total: -47 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-11udhcpd: clamp down huge auto_times to ~2M seconds, better EINTR poll handlingDenys Vlasenko
EINTR _should_ only happen on two signals we trap, and safe_poll _should_ work here just fine, but there were kernel bugs where spurious EINTRs happen (e.g. on ptrace attach). Be safe. function old new delta udhcpd_main 1437 1468 +31 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-10udhcpd: fix "not dying on SIGTERM"Denys Vlasenko
Fixes: commit 52a515d18724bbb34e3ccbbb0218efcc4eccc0a8 "udhcp: use poll() instead of select()" Feb 16 2017 udhcp_sp_read() is meant to check whether signal pipe indeed has some data to read. In the above commit, it was changed as follows: - if (!FD_ISSET(signal_pipe.rd, rfds)) + if (!pfds[0].revents) return 0; The problem is, the check was working for select() purely by accident. Caught signal interrupts select()/poll() syscalls, they return with EINTR (regardless of SA_RESTART flag in sigaction). _Then_ signal handler is invoked. IOW: they can't see any changes to fd state caused by signal haldler (in our case, signal handler makes signal pipe ready to be read). For select(), it means that rfds[] bit array is unmodified, bit of signal pipe's read fd is still set, and the above check "works": it thinks select() says there is data to read. This accident does not work for poll(): .revents stays clear, and we do not try reading signal pipe as we should. In udhcpd, we fall through and block in socket read. Further SIGTERM signals simply cause socket read to be interrupted and then restarted (since SIGTERM handler has SA_RESTART=1). Fixing this as follows: remove the check altogether. Set signal pipe read fd to nonblocking mode. Always read it in udhcp_sp_read(). If read fails, assume it's EAGAIN and return 0 ("no signal seen"). udhcpd avoids reading signal pipe on every recvd packet by looping if EINTR (using safe_poll()) - thus ensuring we have correct .revents for all fds - and calling udhcp_sp_read() only if pfds[0].revents!=0. udhcpc performs much fewer reads (typically it sleeps >99.999% of the time), there is no need to optimize it: can call udhcp_sp_read() after each poll unconditionally. To robustify socket reads, unconditionally set pfds[1].revents=0 in udhcp_sp_fd_set() (which is before poll), and check it before reading network socket in udhcpd. TODO: This might still fail: if pfds[1].revents=POLLIN, socket read may still block. There are rare cases when select/poll indicates that data can be read, but then actual read still blocks (one such case is UDP packets with wrong checksum). General advise is, if you use a poll/select loop, keep all your fds nonblocking. Maybe we should also do that to our network sockets? function old new delta udhcp_sp_setup 55 65 +10 udhcp_sp_fd_set 54 60 +6 udhcp_sp_read 46 36 -10 udhcpd_main 1451 1437 -14 udhcpc_main 2723 2708 -15 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/3 up/down: 16/-39) Total: -23 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-07udhcp: do not setlinebuf(stdout), we don't print to stdout anymoreDenys Vlasenko
Since bb_info_msg() was eliminated type of buffering on stdout is not important function old new delta udhcpd_main 1463 1451 -12 udhcpc_main 2735 2723 -12 setlinebuf 19 - -19 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 0/2 up/down: 0/-43) Total: -43 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-01udhcpd: use ptr_to_globals for its lone global data (g_leases)Denys Vlasenko
function old new delta udhcpd_main 1461 1463 +2 add_lease 320 318 -2 g_leases 4 - -4 write_leases 223 214 -9 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/2 up/down: 2/-15) Total: -13 bytes text data bss dec hex filename 933232 481 6856 940569 e5a19 busybox_old 933223 481 6852 940556 e5a0c busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-23udhcpc6: additional fix for ppp interface typeDenys Vlasenko
Invent a fictitious MAC only once Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-19udhcpc6: fix for ppp interface typeDenys Vlasenko
function old new delta d6_read_interface 454 600 +146 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-17udhcpc[6]: remove overzealous timeout clamping codeDenys Vlasenko
function old new delta udhcpc_main 2840 2826 -14 udhcpc6_main 2699 2670 -29 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: --help fixesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: show only short opts in --help textDenys Vlasenko
function old new delta packed_usage 26028 25966 -62 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: fix lease time staying very small because -d was not specifiedDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: code shrinkDenys Vlasenko
function old new delta udhcpc6_main 2723 2727 +4 .rodata 128695 128561 -134 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: add support of prefix delegationDenys Vlasenko
Based on patch by DannyAAM <danny@saru.moe> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: preparatory patch, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-16udhcpc6: fix ipv6prefix[_lease] envvar value in script invocationDenys Vlasenko
Based on a patch by DannyAAM <danny@saru.moe>. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-08dhcprelay: code shrinkDenys Vlasenko
function old new delta dhcprelay_main 961 958 -3 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-05whitespace and comment format fixes, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-29use %m printf specifier where appropriateDenys Vlasenko
function old new delta out 85 75 -10 udhcpd_main 1472 1461 -11 open_stdio_to_tty 98 85 -13 init_exec 245 232 -13 udhcpc_main 2763 2749 -14 do_cmd 4771 4755 -16 status_line_bold_errno 32 14 -18 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/7 up/down: 0/-95) Total: -95 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-29udhcpc[6]: make log2 messages for chaddr field indented like the restDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-29udhcpc: paranoia when using kernel UDP mode for sending renew: server ID may ↵Denys Vlasenko
be bogus With new code, we request that target IP (server ID) must be directly reachable. If it's not, this happens: udhcpc: waiting 2000 seconds udhcpc: entering listen mode: kernel udhcpc: opening listen socket on *:68 wlan0 udhcpc: entering renew state udhcpc: sending renew to 1.1.1.1 udhcpc: send: Network is unreachable ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 1.1.1.1 needs routing, this is fishy! udhcpc: entering rebinding state udhcpc: entering listen mode: raw udhcpc: created raw socket udhcpc: sending renew to 0.0.0.0 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ going to use broadcast which is the desired behavior. Before the patch, packet to 1.1.1.1 was routed over eth0 (!) and maybe even into Internet (!!!). function old new delta udhcpc_main 2752 2763 +11 udhcp_send_kernel_packet 295 301 +6 send_renew 82 84 +2 send_packet 166 168 +2 bcast_or_ucast 23 25 +2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/0 up/down: 23/0) Total: 23 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-29udhcpc[6]: initialize entire sockaddr_llDenys Vlasenko
I see random field values like sll_hatype=0x267 when I strace. They seem to not matter, but just in case they sometimes do, let's at least have deterministic values (via memset(0)). function old new delta change_listen_mode 308 322 +14 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 18:00:46 +0000