[Chilli] CoovaChilli Kernel Mode issue

[Phyo Wai Soe]

Greetings all,

I am very much new to CoovaChilli and testing it out to use it in an ISP environment. I am using CoovaChilli 1.3 under Ubuntu 12.04. I compiled CoovaChilli from the source and could run it successfully (clients will see the log in page) in user mode. I then recompiled it with kernel mode on and started having a redirection issue. But if I authorize that client IP manually with chilli_query, he can surf the web. 

The issue is that when an authorized client goes to any webpage, he will only see -

          The connection was reset    The connection to the server was reset while the page was loading.

He won't see the redirection or the log in page. This is the address - http://192.168.99.1:3990/www/coova.html?loginurl=http%3a%2f%2f192.168.99.1%3a4990%2fwww%2flogin.chi%3fres%3dnotyet%26uamip%3d192.168.99.1%26uamport%3d3990%26challenge%3db925a8a4434c2ba0653b10ee47c01c96%26called%3d08-00-27-0D-27-23%26mac%3d08-00-27-E3-0F-FF%26ip%3d10.99.0.2%26nasid%3dnas01%26sessionid%3d52777de000000001%26userurl%3dhttp%253a%252f%252fwww.fnb.co.za%252f%26md%3dE1A65E6DF23FB0912CFD754A7E4F9E6C

If I run the server in debug mode, here is what it shows when client goes to www.fnb.co.za:

dhcp.c: 3632: 0 (Debug) Address found
dns.c: 187: 0 (Debug) It was a dns record type: 1 class: 1
dns.c: 194: 0 (Debug) DNS: www.fnb.co.za
dns.c: 187: 0 (Debug) It was a dns record type: 1 class: 1
dns.c: 194: 0 (Debug) DNS: www.fnb.co.za
dns.c: 187: 0 (Debug) It was a dns record type: 1 class: 1
dns.c: 187: 0 (Debug) It was a dns record type: 1 class: 1
dhcp.c: 3632: 0 (Debug) Address found
dhcp.c: 3632: 0 (Debug) Address found
dhcp.c: 3632: 0 (Debug) Address found
redir.c: 2103: 0 (Debug) The path: 
redir.c: 2413: 0 (Debug) -->> Setting userurl=[http://www.fnb.co.za/]
redir.c: 3962: 0 (Debug) redir_accept: Original request host=www.fnb.co.za
redir.c: 987: 0 (Debug) redir_wispr2_reply
========================================================
On the CoovaChilli server, eth0 is the WAN interface and eth1 is the DHCP interface. I am not using any Radius server yet and most settings are the defaults. Here is the config -

HS_WANIF=eth0            # WAN Interface toward the Internet
HS_NETWORK=10.99.0.0       # HotSpot Network (must include HS_UAMLISTEN)
HS_NETMASK=255.255.255.0   # HotSpot Network Netmask
HS_UAMLISTEN=192.168.99.1  # HotSpot IP Address (on subscriber network)
HS_UAMPORT=3990            # HotSpot UAM Port (on subscriber network)
HS_UAMUIPORT=4990   
#Added for Coova Kernel module config
HS_DHCPLISTEN=10.99.0.1
HS_KNAME=chilli

Here are my configs from the /tmp

uamserver       "http://192.168.99.1:4990/www/login.chi"
radiusnasid     "nas01"
papalwaysok
uamaliasname "chilli"
adminupdatefile "/etc/chilli/eth1/local.conf"

net             10.99.0.0/255.255.255.0
uamlisten       192.168.99.1
uamport         3990
dhcpif          eth1
uamallowed      "www.coova.org"
uamanydns
kname "chilli"
dhcplisten "10.99.0.1"
domain "lan"
uamhomepage http://192.168.99.1:3990/www/coova.html
wwwdir /etc/chilli/www
wwwbin /etc/chilli/wwwsh
============================
One strange thing I noted was that when using CoovaChilli in user mode, it would "take over" eth1 which will not have an IP address anymore. But in kernel mode, eth1 gets an address with a wrong subnet mask. It won't make a difference if I assign 10.99.0.1 to eth1 in /etc/network/interfaces or if I change the mask while CoovaChilli is running.

eth0      Link encap:Ethernet  HWaddr 08:00:27:75:e6:48  
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe75:e648/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:465 errors:0 dropped:0 overruns:0 frame:0
          TX packets:476 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:73656 (73.6 KB)  TX bytes:34508 (34.5 KB)

eth1      Link encap:Ethernet  HWaddr 08:00:27:0d:27:23  
          inet addr:10.99.0.1  Bcast:10.255.255.255  Mask:255.0.0.0
          inet6 addr: fe80::a00:27ff:fe0d:2723/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3305 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2465 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:364761 (364.7 KB)  TX bytes:452642 (452.6 KB)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:192.168.99.1  P-t-P:192.168.99.1  Mask:255.255.255.0
          UP POINTOPOINT RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

I am really sorry about the long email. I wish to include all relevant info so that someone can easily spot where I am doing wrong.
I would truly appreciate any help or tip.

Many thanks.

Regards,
Phyo Wai Soe