busybox-w32/networking/telnet.c, branch cron_changes

telnet: fix false positive "Error writing to foreign host"

2026-02-24T22:47:52+00:00

function old new delta write_to_net 620 625 +5 Signed-off-by: Denys Vlasenko

telnet: fixes after testing against some MUD servers

2026-02-24T06:16:16+00:00

A few size tests were not tight enough. More importantly, the logic "is this a telnet server?" made more robust. TTYPE seems to be understood by the MUD server I tried, for some reason NAWS is not? function old new delta packed_usage 36040 36078 +38 write_to_net 598 620 +22 telnet_main 455 462 +7 handle_SIGWINCH 15 21 +6 read_from_net 534 539 +5 show_menu 212 203 -9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/1 up/down: 78/-9) Total: 69 bytes Signed-off-by: Denys Vlasenko

telnet: code shrink

2026-02-23T14:42:43+00:00

function old new delta write_to_stdout 105 113 +8 put_iac 28 35 +7 write_to_net 596 598 +2 read_from_stdin 227 229 +2 read_from_net 543 534 -9 telnet_main 476 455 -21 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/2 up/down: 19/-30) Total: -11 bytes Signed-off-by: Denys Vlasenko

telnet: rewrite to use ioloop()

2026-02-23T13:47:17+00:00

Now should never block on network I/O. Also, window resizing is dynamic now. function old new delta write_to_net - 596 +596 read_from_net - 543 +543 read_from_stdin - 227 +227 show_menu - 212 +212 write_to_stdout - 105 +105 have_data_to_write_to_net - 72 +72 have_data_to_write_to_stdout - 38 +38 put_iac_byte_escaped - 32 +32 ioloop_run 411 438 +27 have_buffer_to_read_from_stdin - 25 +25 have_buffer_to_read_from_net - 25 +25 .rodata 107125 107141 +16 handle_SIGWINCH - 15 +15 put_iac 36 28 -8 put_iac4_msb_lsb 19 - -19 iac_flush 36 - -36 setConMode 87 - -87 handle_net_output 110 - -110 con_escape 271 - -271 telnet_main 1232 476 -756 ------------------------------------------------------------------------------ (add/remove: 11/5 grow/shrink: 2/2 up/down: 1933/-1287) Total: 646 bytes Signed-off-by: Denys Vlasenko

randomconfig fixes

2020-12-29T15:53:11+00:00

Signed-off-by: Denys Vlasenko

libbb: introduce and use sleep1()

2020-11-29T10:37:34+00:00

function old new delta sleep1 - 9 +9 run_shutdown_and_kill_processes 97 95 -2 restore_state_and_exit 116 114 -2 reread_partition_table 67 65 -2 flush_buffer_cache 80 78 -2 chat_main 1302 1300 -2 timeout_main 310 307 -3 telnet_main 1235 1232 -3 stop_handler 86 83 -3 process_action 1078 1075 -3 nbdclient_main 1185 1182 -3 init_main 789 786 -3 getty_main 1541 1538 -3 do_time 410 407 -3 runsv_main 1682 1677 -5 pause_and_low_level_reboot 59 54 -5 inetd_main 1917 1911 -6 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/16 up/down: 9/-50) Total: -41 bytes Signed-off-by: Denys Vlasenko

telnet: add disabled code to emit EC and IP

2019-10-18T14:47:37+00:00

> 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

telnet: fix uninitialized variable bug

2019-09-25T11:48:01+00:00

function old new delta telnet_main 1236 1238 +2 Signed-off-by: Denys Vlasenko

telnet: placate compiler's warning

2019-01-09T12:12:58+00:00

Signed-off-by: Denys Vlasenko

telnet: provide feedback after successful connect

2019-01-06T18:20:05+00:00

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 Signed-off-by: Denys Vlasenko