Notes On OpenWRT

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  • Radvd needs the following patch applied to work in the buildroot (scanner.l) : 
* https://packetprotector.org/trac/browser/buildroot/trunk/pp-openwrt-1.0/package/radvd/patches/no-libfl.patch?rev=1
  old  	 new  	 
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  22	22	extern char *conf_file; 
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   	24	int yywrap(void) { return 1; } 
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  • It also needs the -lfl dependancy removed from its Makefile
  • This is the radvd Makefile for package/radvd-np-Makefile 
#
# Copyright (C) 2006-2008 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
 
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
 
PKG_NAME:=radvd-np
PKG_RELEASE:=0.1
PKG_SOURCE_URL:=http://www.evolution-systems.co.uk/software/np
 
PKG_VERSION:=0.1
 
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 
include $(INCLUDE_DIR)/package.mk
 
define Package/radvd-np
  SECTION:=net
  CATEGORY:=Base system
  TITLE:=RADVD NP++
  URL:=http://www.evolution-systems.co.uk
endef
 
define Package/radvd-np/description
 RADVD NP++
endef
 
#CONFIGURE_ARGS += \
#   --with-linux-headers="$(LINUX_DIR)" \
 
#define Build/Prepare
#$(call Build/Prepare/Default)
#   ( cd $(PKG_BUILD_DIR) ; \
#       [ -f ./configure ] || { \
#           ln -sf configure.in configure.ac ; \
#           autoconf ; \
#       } \
#   )
#endef
 
#define Build/Compile
#   $(MAKE) -C $(PKG_BUILD_DIR) \
#   CXX="$(TARGET_CROSS)gcc"
#endef
 
define Package/radvd-np/install
    $(INSTALL_DIR) $(1)/usr/sbin
    $(INSTALL_BIN) $(PKG_BUILD_DIR)/radvd $(1)/usr/sbin/
endef
 
$(eval $(call BuildPackage,radvd-np))


  • To add files to the buildroot create a directory named 'files' in the top level openwrt buildroot directory. Then inside there you can add any directory that would be in the root directory of the filesystem ('root', 'bin', 'etc') etc and add files into those. These will then be added to the final image after doing a 'make'. This is useful for adding mapd, the kernel modules etc to the image.
  • Some configs

/etc/config/network 

#### VLAN configuration 
config switch eth0
        option vlan0    "0 1 2 3 5*"
        option vlan1    "4 5"
 
 
#### Loopback configuration
config interface loopback
        option ifname   "lo"
        option proto    static
        option ipaddr   127.0.0.1
        option netmask  255.0.0.0
 
 
#### LAN configuration
config interface lan
#       option type     bridge
        option ifname   "eth0.0"
        option proto    static
        option ipaddr   192.168.30.1
        option netmask  255.255.255.0
 
 
#### WAN configuration
config interface        wan
        option ifname   "eth0.1"
        option proto    static  
        option ipaddr   10.30.150.10
        option netmask  255.255.255.0
        option gateway  10.30.150.1  
        option dns      10.30.0.20 
        option ip6addr  2001:630:80:7450::2/64
        option ip6gw    2001:630:80:7450::1
 
config interface        wifi
        option ifname   lan0
        option proto    static
        option ipaddr   192.168.20.1
        option netmask  255.255.255.0
        option gateway  10.30.150.1
        option dns      10.30.0.20
        option ip6addr  2001:630:80:745b::1/64
        option ip6gw    2001:630:80:7450::1

/etc/config/wireless 

config wifi-device  wlan0
        option type     mac80211
        option channel  5
 
        # REMOVE THIS LINE TO ENABLE WIFI:
        option disabled 0
 
config wifi-iface
        option device   wlan0
        option network  wifi
        option mode     ap
        option ssid     NP_AP
        option encryption none
 
#config wifi-device  wlan1
#       option type     mac80211
#       option channel  5
 
        # REMOVE THIS LINE TO ENABLE WIFI:
#       option disabled 1
 
#config wifi-iface
#       option device   wlan1
#       option network  lan
#       option mode     ap
#       option ssid     OpenWrt
#       option encryption none
#config wifi-device  wlan2
#       option type     mac80211
#       option channel  5
#
#       # REMOVE THIS LINE TO ENABLE WIFI:
#       option disabled 1
#
#config wifi-iface
#       option device   wlan2
#       option network  lan
#       option mode     ap
#       option ssid     OpenWrt
#       option encryption none

/etc/config/dhcp 

config dnsmasq
        option domainneeded     1
        option boguspriv        1
        option filterwin2k      '0'  #enable for dial on demand
        option localise_queries 1
        option local    '/lan/'
        option domain   'lan'
        option expandhosts      1
        option nonegcache       0
        option authoritative    1
        option readethers       1
        option leasefile        '/tmp/dhcp.leases'
        option resolvfile       '/tmp/resolv.conf.auto'
        #list server            '/mycompany.local/1.2.3.4'
        #option nonwildcard     0
        #list interface         br-lan
 
config dhcp lan
        option interface        lan
        option start    100
        option limit    150
        option leasetime        12h
 
config dhcp wifi                       
        option interface        wifi
        option start    100
        option limit    150
        option leasetime        12h
 
config dhcp wan
        option interface        wan
        option ignore   1

/etc/init.d/np_init 

#!/bin/sh /etc/rc.common
# NP++ startup script   
START=98             
#STOP=15
start() {
        # Insert NP++ modules and launch radvd and mapad
        insmod /root/modules/np++-openwrt.ko
        insmod /root/modules/sample_map.ko
        sysctl -w net.ipv6.conf.all.forwarding=1
        /usr/sbin/radvd -C /etc/radvd.conf
        #                                    
        # Only need mapad if you are not an edge router
        #                                     
#       /bin/mapad -C /etc/mapad-wlan0.conf & 
#       /bin/mapad -C /etc/mapad-eth0.0.conf &
}                                             
stop() {                  
        echo stopping NP++
        rmmod sample_map  
        rmmod np++-openwrt   
#       killall -9 mapad              
#       killall -9 radvd              
        rm /var/run/radvd.pid         
        # commands to kill application
}
  • Remember to run '/etc/init.d/np_init enable' to get the script to run at boot time (and to chmod +x it)

/etc/radvd.conf 

interface wlan0
{
      AdvSendAdvert on;
 
#
# These settings cause advertisements to be sent every 3-10 seconds.  This
# range is good for 6to4 with a dynamic IPv4 address, but can be greatly
# increased when not using 6to4 prefixes.
#
 
      MinRtrAdvInterval 3;
      MaxRtrAdvInterval 10;
 
#
# You can use AdvDefaultPreference setting to advertise the preference of
# the router for the purposes of default router determination.
# NOTE: This feature is still being specified and is not widely supported!
#
      AdvDefaultPreference low;
 
#
# Disable Mobile IPv6 support
#
      AdvHomeAgentFlag off;
 
#
# Enable NP++
#
      EnNp on;
 
#
# example of a standard prefix
##
      prefix 2001:630:80:745a::/64
      {
              AdvOnLink on;
              AdvAutonomous on;
              AdvRouterAddr on;
      };
#     prefix 2001:db8::/64
#     {
#             AdvOnLink on;
#             AdvAutonomous on;
#             AdvRouterAddr on;
#     };
#     prefix 2001:db9:1:0::/64
#     {
#             AdvOnLink on;
#             AdvAutonomous on;
#             AdvRouterAddr off;
#     };
 
 
#
# NP++ Mappings - format: <mapping number>/<priority>
#
 
 
      NpMapping 0/100
      {
              AdvMapping on;
      };
      NpMapping 1/1
      {
              AdvMapping on;
      };
      NpMapping 2/5
      {
              AdvMapping on;
      };
      NpMapping 3/10
      {
              AdvMapping on;
      };
      NpMapping 4/2
      {
              AdvMapping on;
      };
 
};
 
interface eth0.0
{
      AdvSendAdvert on;
 
 
      MinRtrAdvInterval 3; 
      MaxRtrAdvInterval 10;
 
      AdvDefaultPreference low;
 
      AdvHomeAgentFlag off;
 
      EnNp on;                                                          
 
        prefix 2001:630:80:745b::/64                                      
        {                                                               
              AdvOnLink on;            
              AdvAutonomous on;
              AdvRouterAddr on;
      };
 
        NpMapping 0/100           
      {                     
              AdvMapping on;      
      };                          
      NpMapping 1/1                                
      {                                            
              AdvMapping on;   
      };                       
      NpMapping 2/5                                
      {                                            
              AdvMapping on;
      };                       
        NpMapping 3/10           
        {                        
              AdvMapping on;  
        };                      
        NpMapping 4/2        
        {                        
              AdvMapping on;    
      };      
};

hostapd.conf 

driver=nl80211
interface=wlan0
bridge=br-lan
ssid=OpenWrt
hw_mode=g
channel=6
wpa=1
wpa_passphrase=abcdefgh
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP CCMP
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