#46 ZLib compression enabled when I configure 'lzo' alone

[Bishop]

A server configuration like the following should invoke and use LZO for compression:

session01 {
passwd passme;
type tun;
proto udp;
compress lzo;
up {
ifconfig "%% 10.1.1.102 pointopoint 10.1.1.103 mtu 1450";
};
}

However, it does not:

vtund -n -P 113 session01 jitterbug
vtund[7957]: VTun client ver 3.X 12/11/2006 started
vtund[7957]: Connecting to jitterbug
vtund[7957]: Session session01[jitterbug] opened
vtund[7957]: UDP connection initialized
vtund[7957]: ZLIB compression[level 2] initialized.
vtund[7957]: Blowfish-128-ECB encryption initialized
vtund[7957]: Closing connection
vtund[7957]: Session session01[jitterbug] closed
vtund[7957]: Exit

ZLib compression was used instead.

[Bishop]

Logged In: YES
user_id=10830
Originator: YES

as a workaround, use a compression level explicitly:

compress lzo:3;

[Bishop]

Logged In: YES
user_id=10830
Originator: YES

the problem stems to this code in cfg_file.y @342:

compress:
NUM {
if( $1 ){
parse_host->flags |= VTUN_ZLIB;
parse_host->zlevel = $1;
}

Generating this code:

case 57:
#line 343 "cfg_file.y"
{
if( yyvsp[0].num ){
parse_host->flags |= VTUN_ZLIB;
parse_host->zlevel = yyvsp[0].num;
}
}
break;
}

which clearly cannot understand lzo unless there's a compression level given.