[Bug 1448500] Re: tftp-hpa doesn't accept IPv4 connections

[Frans Oilinki]

It seems tftpd-hpa interprets option --address ::69 to mean that only listen on IPv6:
1. By default (with TFTP_ADDRESS="[::]:69") it is started as

    /usr/sbin/in.tftpd --listen --user tftp --address [::]:69 --secure
--create /srv/tftp

2. netstat (command "sudo netstat -anutp | grep '[:]69'") shows:

        udp6       0      0 :::69                   :::*
10681/in.tftpd

I do not know and I am not interested to check the source code if there
is way to explicitly tell tftpd-hpa to listen on all interfaces, both
IPv4 and IPv6, but if you just omit the --address option, tftpd-hpa -
per netstat output - listens on all interfaces both IPv4 and IPv6; when
I start tftp-hpa as  "/usr/sbin/in.tftpd --listen --user tftp --secure
--create /srv/tftp" then netstat shows

       udp        0      0 0.0.0.0:69              0.0.0.0:*                           24607/in.tftpd  
       udp6       0      0 :::69                   :::*                                24607/in.tftpd  

I accomplished this by hacking /etc/init.d/tftpd-hpa as follows:

diff --git a/init.d/tftpd-hpa b/init.d/tftpd-hpa
index 115ca4e..a4a5b60 100755
--- a/init.d/tftpd-hpa
+++ b/init.d/tftpd-hpa
@@ -52,9 +52,15 @@ do_start()
                fi
        done
 
+       if [ "$TFTP_ADDRESS" = "[::]:69" ]; then        # all interfaces
+               start-stop-daemon --start --quiet --oknodo --exec $DAEMON -- \
+                        --listen --user $TFTP_USERNAME \
+                       $TFTP_OPTIONS $TFTP_DIRECTORY
+       else
                start-stop-daemon --start --quiet --oknodo --exec $DAEMON -- \
                        --listen --user $TFTP_USERNAME --address $TFTP_ADDRESS \
                        $TFTP_OPTIONS $TFTP_DIRECTORY
+       fi
 }
 
 do_stop ()

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https://bugs.launchpad.net/bugs/1448500

Title:
  tftp-hpa doesn't accept IPv4 connections

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