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path: root/networking/udhcp/dhcpd.c
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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>
2020-06-29acpid: 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>
2020-01-14udhcpd: 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>
2019-07-02libbb: 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>
2019-05-31dhcp: 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>
2019-05-21udhcpd: 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>
2019-05-15udhcpd: 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>
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>
2018-06-21udhcpc: 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>
2018-05-14udhcpc6: 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>
2018-03-11udhcpd: 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>
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: 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>
2017-08-08getopt32: remove opt_complementaryDenys Vlasenko
function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-06-28udhcpc6: make -O OPT workDenys Vlasenko
Patch is based on work by tiggerswelt.net. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-02-16udhcp: use poll() instead of select()Denys Vlasenko
function old new delta udhcp_sp_read 65 46 -19 udhcp_sp_fd_set 79 54 -25 udhcpd_main 1530 1482 -48 udhcpc_main 2780 2730 -50 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-142) Total: -142 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-23Convert all udhcp applets to "new style" applet definitionsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-04dhcp: merge leases.c and static_leases.c into dhcpd.cDenys Vlasenko
function old new delta send_offer 292 461 +169 udhcpd_main 1531 1588 +57 read_leases 330 332 +2 add_lease 314 312 -2 find_lease_by_mac 68 - -68 find_free_or_expired_nip 174 - -174 ------------------------------------------------------------------------------ (add/remove: 0/4 grow/shrink: 3/1 up/down: 228/-244) Total: -16 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-04dhcp: merge most of static_leases.c into dhcpd.cDenys Vlasenko
function old new delta read_staticlease 121 222 +101 add_static_lease 48 - -48 log_static_leases 68 - -68 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 1/0 up/down: 101/-116) Total: -15 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-04dhcp: merge files.c into dhcpd.cDenys Vlasenko
Added NOINLINE to two function, since my version of gcc would actualy increase code size otherwise. I see no size changes. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-04-21udhcp: add setup_common_bufsiz() as neededDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-03-30dhcpd: string reuseDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-03-30udhcp: get rid of bb_info_msg()Denys Vlasenko
function old new delta udhcpd_main 1501 1531 +30 d6_recv_raw_packet 251 264 +13 perform_d6_release 188 198 +10 udhcpc6_main 2443 2449 +6 udhcp_recv_raw_packet 582 588 +6 udhcp_recv_kernel_packet 132 138 +6 send_d6_renew 140 146 +6 d6_recv_kernel_packet 118 124 +6 send_renew 77 82 +5 send_discover 85 90 +5 send_decline 84 89 +5 send_d6_select 97 102 +5 send_d6_discover 174 179 +5 perform_release 167 172 +5 count_lines 72 74 +2 udhcpc_main 2836 2837 +1 bb_info_msg 125 - -125 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 17/4 up/down: 117/-180) Total: -63 bytes text data bss dec hex filename 924935 906 17160 943001 e6399 busybox_old 924736 906 17160 942802 e62d2 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-01-27dhcpd: fix an improper widening conversionDenys Vlasenko
We wanted to detect when tv_sec = unsigned1 - unsigned2 underflows by looking at tv_sec's sign. But if tv_sec is long and it is wider than unsigned, we get unsigned -> long conversion which is in this case never negative. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2014-10-30udhcpd: add option for tweaking arppingMichel Stam
Some clients have a very short timeout for sending the DHCP DISCOVER, shorter than the arpping timeout of 2000 milliseconds that udhcpd uses by default. This patch allows tweaking the timeout, or disabling of arpping altogether, at the risk of handing out addresses which are already in use. function old new delta udhcpd_main 1460 1501 +41 udhcpc_main 2814 2851 +37 packed_usage 29957 29974 +17 arpping 477 493 +16 find_free_or_expired_nip 161 174 +13 send_offer 285 292 +7 nobody_responds_to_arp 85 89 +4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 7/0 up/down: 135/0) Total: 135 bytes Signed-off-by: Michel Stam <m.stam@fugro.nl> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-03-14udhcpd: also add -I ADDR to help textDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-03-13udhcpd: add -I LOCAL_ADDR optionDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2012-07-24dhcpd: write lease file on exitDenys Vlasenko
function old new delta udhcpd_main 1431 1403 -28 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2011-10-18udhcp: IF_UDHCP_VERBOSE() macro - improve code readabilityLeonid Lisovskiy
Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2011-04-11move remaining help text from include/usage.src.hPere Orga
Signed-off-by: Pere Orga <gotrunks@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-11-28dhcpd: reply with NAK to clients in INIT-REBOOT state w/o existing leaseDenys Vlasenko
We were not responding to them at all. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-11-28dhcpd: smaller code: do not look for REQUESTED_IP twiceDenys Vlasenko
text data bss dec hex filename 883235 936 17192 901363 dc0f3 busybox_old 883219 936 17192 901347 dc0e3 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-10-28*: whitespace fixesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-10-21udhcpd: reduce stack usage by ~700 bytes. +28 bytes code sizeDenys Vlasenko
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
2010-06-04udhcpd: fix daemonize crash on nommu systemsMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-04-04udhcpd: note missing sanity checks on INFORM message handlingDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-03-27udhcpd: fix -v/-P mixupDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-03-26udhcp: cosmetic cleanups; one case of s/full_read/xread/Denys Vlasenko
function old new delta dumpleases_main 632 623 -9 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 13:53:59 +0000