Build a WAP Gateway On Linux

Configuring the gateway
The bearerbox and wapbox are the main working modules of the gateway, and must be configured before configuring the gateway. These two modules are controlled by a configuration file that has wapbox and bearerbox groups.

A configuration file consists of groups of configuration variables. Groups are separated by empty lines, with each variable defined on its own line (each group in Kannel configuration is distinguished with a group variable). Lines beginning with a hash mark (#) are comments and should be ignored.

A variable definition line has the name of the variable, the equal sign (=), and the value of the variable. The name of the variable can contain any character except white spaces and equal signs. The value of the variable is a string, with or without quotation marks around it. Quotation marks are needed if the variable begins or ends with a white space or contains special characters. A normal C escape character syntax works inside quotation marks.

Working with configuration files
I'm including an example of the configuration file that I used for this project; it is the basic file with which the gateway runs. There is, however, a list of other attributes available to control the gateway. You can learn about them by referring to the Kannel User Guide.

#The sample.conf file which is the core configuration file

#for running the WAP Gateway

#Start of Configuration File



group = core

admin-port = 13000

admin-port-ssl = false

admin-password = rose123

status-password = rose123

admin-deny-ip = "205.158.62.76"

admin-allow-ip = "*.*.*.*"

wapbox-port = 13002

box-deny-ip = "205.158.62.76"

box-allow-ip = "*.*.*.*"

udp-deny-ip = "205.158.62.76"

udp-allow-ip = "*.*.*.*"

wdp-interface-name = "*"

log-file = "my_kannel.log"

log-level = 1



#The wapbox group for WAP gateway configuration

group = wapbox

bearerbox-host = localhost

timer-freq = 1

log-file = "my_wap.log"

log-level = 1

#End of Configuration File

Understanding the various attributes given in the sample configuration file
A group contains the ID of the group to which it relates. If the ID is core, then it's the bearerbox configuration; otherwise, a wapbox ID is for the wapbox configuration. The admin-port identifies the port through which the HTTP administration is to be done. The various other attributes of the group bearerbox and wapbox are described in Tables 2 and 3. The mandatory fields are denoted by an m, o is optional, and c is conditional.

Table 1. Configuration file attributes for the bearerbox

Table 2. Configuration file attributes for the wapbox

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