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path: root/networking/telnetd.c
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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>
2019-04-04telnetd: whitespace fixDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-04telnetd: better AYT handlingDenys Vlasenko
function old new delta telnetd_main 1792 1837 +45 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-04telnetd: Added support for AYT IAC command.Martin Lewis
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>
2019-01-06telnetd: fix bad interaction with vhangup() from loginDenys Vlasenko
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>
2017-07-27config: trim/improve item names and help texts, take 2Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21config: deindent all help textsDenys Vlasenko
Those two spaces after tab have no effect, and always a nuisance when editing. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18Update menuconfig items with approximate applet sizesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-23Convert all networking/* applets to "new style" applet definitionsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-13telnetd: ifdef out a buggy error handling code pathDenys Vlasenko
Here, not handling the error is would just eat one input 0xff char. Correct handling would need even more corner case handling, as-is buggy handling corrupts the buffer. Since we just been told by kernel that pty is ready, EAGAIN should not be happening here anyway. function old new delta telnetd_main 1798 1785 -13 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-12telnetd: add another handshake example in comments, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-12telnetd: treat all 2-byte IACs in 240..249 range as NOPs.Denys Vlasenko
A bit of future-proofing. Some of them can stand just being ignored. function old new delta telnetd_main 1791 1798 +7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-12telnetd: fix corner case of input processing of 0xff bytesDenys Vlasenko
I managed to reproduce the bug, with some difficulty. function old new delta telnetd_main 1780 1791 +11 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-12telnetd: fix a corner case where CRLF->CR translation can misbehaveDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-12telnetd: fix handling of short writes to ptyDenys Vlasenko
If a write to pty is short, remove_iacs() can be run on a buffer repeatedly. This, for example, can eat 0xff chars (IACs, in telnet terms). Rework the logic to handle IACs in a special "write to pty" function. function old new delta telnetd_main 1662 1750 +88 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-07-06getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LISTDenys Vlasenko
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>
2016-04-21*: add most of the required setup_common_bufsiz() callsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-04-21libbb: make bb_common_bufsiz1 1 kbyte, add capability to use bss tail for itDenys Vlasenko
The config item is FEATURE_USE_BSS_TAIL. When it is off (default): function old new delta read_config 210 228 +18 doCommands 2279 2294 +15 ipneigh_list_or_flush 763 772 +9 ipaddr_list_or_flush 1256 1261 +5 display_process_list 1301 1306 +5 conspy_main 1378 1383 +5 do_lzo_compress 352 355 +3 do_lzo_decompress 565 567 +2 push 46 44 -2 inetd_main 2136 2134 -2 uevent_main 421 418 -3 addLines 97 92 -5 bb_common_bufsiz1 8193 1024 -7169 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 8/5 up/down: 62/-7181) Total: -7119 bytes text data bss dec hex filename 829850 4086 9080 843016 cdd08 busybox_old 829901 4086 1904 835891 cc133 busybox_unstripped FEATURE_USE_BSS_TAIL=y: read_config 210 228 +18 doCommands 2279 2294 +15 ipneigh_list_or_flush 763 772 +9 ipaddr_list_or_flush 1256 1261 +5 display_process_list 1301 1306 +5 conspy_main 1378 1383 +5 do_lzo_compress 352 355 +3 do_lzo_decompress 565 567 +2 inetd_main 2136 2134 -2 bb_common_bufsiz1 8193 - -8193 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 8/1 up/down: 62/-8195) Total: -8133 bytes text data bss dec hex filename 829850 4086 9080 843016 cdd08 busybox_old 829911 4086 880 834877 cbd3d busybox_unstripped FIXME: setup_common_bufsiz() calls are missing. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-08-24libbb: add setsockopt_foo helpersDenys Vlasenko
function old new delta setsockopt_int - 23 +23 do_load 918 934 +16 setsockopt_SOL_SOCKET_int - 14 +14 setsockopt_keepalive - 10 +10 setsockopt_SOL_SOCKET_1 - 10 +10 buffer_fill_and_print 169 178 +9 setsockopt_1 - 8 +8 nfsmount 3560 3566 +6 redirect 1277 1282 +5 tcpudpsvd_main 1782 1786 +4 d6_send_kernel_packet 272 275 +3 i2cget_main 380 382 +2 ed_main 2544 2545 +1 scan_recursive 380 378 -2 nbdclient_main 492 490 -2 hash_find 235 233 -2 cmdputs 334 332 -2 parse_command 1443 1440 -3 static.two 4 - -4 ntpd_main 1039 1035 -4 const_int_1 4 - -4 const_IPTOS_LOWDELAY 4 - -4 RCVBUF 4 - -4 ntp_init 474 469 -5 change_listen_mode 316 310 -6 uevent_main 416 409 -7 arping_main 1697 1690 -7 telnet_main 1612 1603 -9 socket_want_pktinfo 42 33 -9 setsockopt_reuseaddr 21 10 -11 setsockopt_broadcast 21 10 -11 httpd_main 772 757 -15 get_remote_transfer_fd 109 94 -15 make_new_session 503 487 -16 ftpd_main 2177 2160 -17 read_bunzip 1896 1866 -30 common_traceroute_main 4099 4058 -41 common_ping_main 1836 1783 -53 ------------------------------------------------------------------------------ (add/remove: 5/4 grow/shrink: 8/21 up/down: 111/-283) Total: -172 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-01-05libbb: code shrink by factoring out common update_utmp_DEAD_PROCESSDenys Vlasenko
function old new delta update_utmp_DEAD_PROCESS - 17 +17 telnetd_main 1685 1674 -11 mark_terminated 56 45 -11 handle_sigchld 74 63 -11 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2012-09-13telnet: convert CR -> CR LF, not CR -> CR NUL when sending data to serverDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2011-06-05*: remove "Options:" string from help textsDenys Vlasenko
function old new delta packed_usage 28706 28623 -83 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>
2011-01-25move utmp.h include to libbb.hDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-11-30telnetd: write utmp record with correct pidDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-10-29whitespace cleanupDenys Vlasenko
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
2010-08-16*: make GNU licensing statement forms more regularDenys Vlasenko
This change retains "or later" state! No licensing _changes_ here, only form is adjusted (article, space between "GPL" and "v2" and so on). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-05-10work on adding testsuite runs to randomconfig test buildsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-04-06telnetd: fill hostname field in utmp/wtmp recordsDenys Vlasenko
function old new delta get_lsa - 109 +109 make_new_session 438 504 +66 get_peer_lsa - 10 +10 ftpd_main 2340 2267 -73 get_sock_lsa 101 10 -91 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 1/2 up/down: 185/-164) Total: 21 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-04-05telnetd: write LOGIN/DEAD_PROCESS utmp records. Closes bug 1363Denys Vlasenko
function old new delta write_new_utmp - 253 +253 skip_dev_pfx - 30 +30 handle_sigchld 42 72 +30 telnetd_main 1650 1673 +23 make_new_session 415 438 +23 ... login_main 1140 1148 +8 update_utmp 337 313 -24 write_wtmp 220 154 -66 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 11/6 up/down: 406/-115) Total: ~291 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-04-04who: fix attempts to open '/dev/dev/ttyX'; make columns a bit wider, add -HDenys Vlasenko
function old new delta who_main 292 363 +71 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-02-04*: suppress ~60% of "aliased warnings" on gcc-4.4.1Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2009-11-02*: introduce and use ffulsh_all()Denys Vlasenko
function old new delta buffer_fill_and_print 179 196 +17 fflush_all - 9 +9 spawn 87 92 +5 rtcwake_main 455 453 -2 ... alarm_intr 93 84 -9 readcmd 1072 1062 -10 bb_ask 345 333 -12 more_main 845 832 -13 flush_stdout_stderr 42 23 -19 xfflush_stdout 27 - -27 flush_stderr 30 - -30 ------------------------------------------------------------------------------ (add/remove: 1/2 grow/shrink: 2/50 up/down: 31/-397) Total: -366 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2009-10-19randomconfig fixesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2009-09-04telnetd: add -w ("inetd wait") option. Can be configured off.Denys Vlasenko
gcc fils to fully optimize it out when it's off: function old new delta telnetd_main 1527 1548 +21 packed_usage 26596 26587 -9 but nevertheless it's a useful (and so far single) example how to write "inetd wait" tcp service. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2009-06-10telnetd: more compact version of the fix for stray open fdsDenys Vlasenko
function old new delta telnetd_main 1520 1527 +7 make_new_session 510 416 -94 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 7/-94) Total: -87 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2009-06-09telnetd: properly close fds in childDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2009-04-21*: mass renaming of USE_XXXX to IF_XXXXDenis Vlasenko
and SKIP_XXXX to IF_NOT_XXXX - the second one was especially badly named. It was not skipping anything!
2009-03-08ftpd: code chrink, fixed some minor bugsDenis Vlasenko
ls: update comment *: openlog fixes (added LOG_PID, set LOG_DAEMON as appropriate) function old new delta xwrite_str - 26 +26 cmdio_write_ok - 15 +15 handle_cwd 40 45 +5 packed_usage 25668 25670 +2 cmdio_write_raw 7 9 +2 handle_upload_common 322 320 -2 udhcpd_main 1375 1372 -3 udhcpc_main 2362 2359 -3 port_cleanup 27 23 -4 handle_dir_common 221 209 -12 str_netfd_write 26 - -26 cmdio_get_cmd_and_arg 122 - -122 ftpd_main 2208 2050 -158 ------------------------------------------------------------------------------ text data bss dec hex filename 809933 476 7864 818273 c7c61 busybox_old 809199 476 7864 817539 c7983 busybox_unstripped
2009-02-02telnetd: do not advertise TELNET_LFLOW, we do not supportDenis Vlasenko
it properly.
2008-11-12telnetd: fix compile problem for non-standalone telnetdDenis Vlasenko
2008-11-11telnetd: correctly output 0xff char. ~100 bytes.Denis Vlasenko
telnet: fix some atrocious names and style. no code changes
2008-11-09telnetd: set SO_KEEPALIVE, users report it's useful. +20 bytes.Denis Vlasenko
2008-11-07telnetd: handle emacs M-DEL and IAC-NOP (putty keepalive)Denis Vlasenko
by Jim Cathey (jcathey AT ciena.com) function old new delta telnetd_main 1314 1364 +50
2008-11-05*: code shrink by adding a wrapper around very common tcsetattr(0, TCSANOW, ↵Denis Vlasenko
xx) op function old new delta tcsetattr_stdin_TCSANOW - 14 +14 set_sane_term 116 113 -3 top_main 1277 1273 -4 make_new_session 421 415 -6 rawmode 133 126 -7 reset_term 18 10 -8 die 43 35 -8 cookmode 62 54 -8 vlock_main 425 415 -10 read_line_input 3165 3155 -10 bb_askpass 357 347 -10 fsck_minix_main 3079 3065 -14 getty_main 2375 2332 -43 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/12 up/down: 14/-131) Total: -117 bytes
2008-07-21telnet: shrinkDenis Vlasenko
telnetd: shrink, and fix issue file printing test: better and shorter usage text function old new delta putiac2 51 50 -1 putiac 24 20 -4 handlenetoutput 95 91 -4 telnet_main 1480 1475 -5 iacflush 37 32 -5 make_new_session 436 421 -15 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/6 up/down: 0/-34) Total: -34 bytes
2008-07-05*: rename ATTRIBUTE_XXX to just XXX.Denis Vlasenko
2008-05-19- use EXIT_{SUCCESS,FAILURE}. No object-code changesBernhard Reutner-Fischer
2008-05-19- Rename getpty() to xgetpty() and adjust callers.Bernhard Reutner-Fischer
- Rewrite kbd_mode and setconsole - Introduce and use console_make_active() and xopen_xwrite_close() - honour buffer-reservation method as set by the user (dumpkmap, loadkmap) - shrink rtcwake and some console-tools Saves about 270 Bytes
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 10:10:58 +0000