That is not a bad idea. I'd wrap it in a C program so I could check if the pppd is alive and not a zombie. BUT -- it begs the question, why only ONE? Every time this happens the process ID would change. Is it serialization or? I am thinking there is something we don't know ... I have offered Martin some help ...
E -----Original Message----- From: stunnel-users [mailto:[email protected]] On Behalf Of Florian Lohoff Sent: Tuesday, May 14, 2019 12:57 AM To: Martin Got <[email protected]> Cc: [email protected] Subject: Re: [stunnel-users] Stunnel 5.44 server side 'exec = pppd' runs second child 'pppd' process after reconnection. Bug? Hola, On Mon, May 13, 2019 at 04:07:57PM +0000, Martin Got wrote: > So second 'pppd' process started and runs simultaneously with the > first 'pppd' and link down. Restarting Stunnel server can clear child > 'pppd' processes. So newly reestablished 'pppd' link between 10.0.1.1 > <--> 10.0.1.2 endpoints works till next interconnection. You might have multiple options - You could use the parameters like peer passed to ip-up.d scripts use to kill the other instance on ip-up. Run pppd through a wrapper to kill the old instance. Use linkname to write a specific pid file. #!/bin/sh linkname=test [ ! -f /var/run/ppp-${linkname}.pid ] || kill $(cat /var/run/ppp-${linkname}.pid) exec pppd linkname ${linkname} $* Or you could use the routing table to find the interface and kill the pppd based on that. #!/bin/sh iface=$(ip -o r get ${REMOTE_IP_ADDRESS} | sed -e 's/.*dev //' -e 's/ .*$//') [ -z ${iface} ] || kill $(cat /var/run/ppp-${iface}.pid) ] exec pppd $* Both completely untested. I would at least configure lcp-echo-failure and lcp-echo-interval so the old pppd instance will soon die because of the missing connection. IIRC the default is 3/10 so after 30 seconds the old instance will die anyway. > pppd[39187] pppd 2.3.5 started by user, uid 0 pppd[43231] Using > interface ppp1 pppd[43231] Connect: ppp0 <--> /dev/ttyp2 pppd[43231] > Local IP address 10.0.1.1 pppd[43231] Remote IP address 10.0.1.2 > pppd[39187] pppd 2.3.5 started by user, uid 0 pppd[39187] Using > interface ppp0 pppd[39187] Connect: ppp0 <--> /dev/ttyp5 pppd[39187] > Couldn't set interface address: Address 10.0.1.1 or destination > 10.0.1.2 already exists Flo -- Florian Lohoff [email protected] UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away _______________________________________________ stunnel-users mailing list [email protected] https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users
