#19878 closed defect (fixed)
uartmode tcpserver <port> only accepts a connection once => fixed in SVN/next maintenance
| Reported by: | Noci | Owned by: | |
|---|---|---|---|
| Component: | uart | Version: | VirtualBox 6.1.14 |
| Keywords: | Cc: | ||
| Guest type: | other | Host type: | Linux |
Description
When connecting to a port setup as tcpserver 2023 a connection will only succeed once. After disconnect no new conenction can be established. Untill the VM is restarted, then a connection only works once again.
It would be helpful if multiple connections can be made. (not at once, in a row). So start listening again after a close of the socket? (Virtualbox 6.1.12r139181 ) Vbox ruuning in a Headless setup.
Attachments (1)
Change History (6)
comment:2 by , 4 years ago
Conversation in capture:
Username: ^] telnet> close Connection closed. [root@its083 Logs]# netstat -antp | grep VB # after conversation tcp 0 0 0.0.0.0:2020 0.0.0.0:* LISTEN 11044/VBoxHeadless tcp 0 0 0.0.0.0:2021 0.0.0.0:* LISTEN 11044/VBoxHeadless tcp 0 0 0.0.0.0:2022 0.0.0.0:* LISTEN 36239/VBoxHeadless tcp 0 0 0.0.0.0:2023 0.0.0.0:* LISTEN 36239/VBoxHeadless tcp 0 743 172.20.10.83:2020 172.27.10.183:59765 ESTABLISHED 11044/VBoxHeadless [root@its083 Logs]# [root@its083 Logs]# telnet localhost 2021 Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Connection closed by foreign host. [root@its083 Logs]# telnet localhost 2021 Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Connection closed by foreign host. [root@its083 Logs]# netstat -antp | grep VB tcp 0 0 0.0.0.0:2020 0.0.0.0:* LISTEN 11044/VBoxHeadless tcp 0 0 0.0.0.0:2021 0.0.0.0:* LISTEN 11044/VBoxHeadless tcp 0 0 0.0.0.0:2022 0.0.0.0:* LISTEN 36239/VBoxHeadless tcp 0 0 0.0.0.0:2023 0.0.0.0:* LISTEN 36239/VBoxHeadless tcp 0 743 172.20.10.83:2020 172.27.10.183:59765 ESTABLISHED 11044/VBoxHeadless
comment:3 by , 4 years ago
| Summary: | uartmode tcpserver <port> only accepts a connection once → uartmode tcpserver <port> only accepts a connection once => fixed in SVN/next maintenance |
|---|
Thanks for the report, will be fixed in the next maintenance release! Until then you can do a "uartmode disconnected" and then "uartmode tcpserver <port>" to be able to connect to the VM again without having to restart it.
comment:4 by , 4 years ago
Was a bit of a search actually the commands are:
VBoxManage controlvm VMNAME changeuartmodeN disconnect VBoxManage controlvm VMNAME changeuartmodeN tcpserver <port>
Note:
See TracTickets
for help on using tickets.
Error in the LOG: (when reconnecting) 68:05:47.142762 DrvTCP0: only single connection supported
Netstat: (2020 = COM1, 2021 = COM2) tcp 0 0 0.0.0.0:2020 0.0.0.0:* LISTEN 11044/VBoxHeadless tcp 0 0 0.0.0.0:2021 0.0.0.0:* LISTEN 11044/VBoxHeadless tcp 0 0 172.20.10.83:2020 172.27.10.183:59765 ESTABLISHED 11044/VBoxHeadless
PC that had the connection (172.27.10.183) has been rebooted, the remote application (putty) was disconnected a day before. The connection is still alive. as far as VBox is concerned.