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Special Forums IP Networking checking a connection still exists? Post 302151184 by porter on Thursday 13th of December 2007 07:14:03 PM
Old 12-13-2007
Quote:
Originally Posted by fishman2001
Is there any way to check that the socket is still alive before sending data?
option 1. Use select() to tell you if there is anything to read and when you can write, if the connection drops then you will be told you can read something and will then get the appropriate error returned by "recv", only "send" if select tells you can write.

option 2. install a SIGPIPE signal handler around the send() to catch any raised signal, then restore the handler after the send.
 

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BlueZ(1)							   User Commands							  BlueZ(1)

NAME
dund - BlueZ Bluetooth dial-up networking daemon DESCRIPTION
DUN daemon SYNOPSIS
dund <options> [pppd options] OPTIONS
--show --list -l Show active DUN connections --listen -s Listen for DUN connections --dialup -u Listen for dialup/telephone connections --connect -c <bdaddr> Create DUN connection --mrouter -m <bdaddr> Create mRouter connection --search -Q[duration] Search and connect --kill -k <bdaddr> Kill DUN connection --killall -K Kill all DUN connections --channel -C <channel> RFCOMM channel --device -i <bdaddr> Source bdaddr --nosdp -D Disable SDP --auth -A Enable authentification --encrypt -E Enable encryption --secure -S Secure connection --master -M Become the master of a piconet --nodetach -n Do not become a daemon --persist -p[interval] Persist mode --pppd -d <pppd> Location of the PPP daemon (pppd) --msdun -X [timeo] Enable Microsoft dialup networking support --activesync -a Enable Microsoft ActiveSync networking --cache -C [valid] Enable address cache DUN daemon February 2003 BlueZ(1)
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