Technical data

8. Documentation for Developers

The Function show_warn

This funtion displays a warning message in a yellow box. It expects two parameters: a title

and a message. Example:

show_info "Warning" "No connection at the moment!"

The Function show_info

This funtion displays an information or success message in a green box. It expects two param-

eters: a title and a message. Example:

show_info "Info" "Action successfully executed!"

The Helper Script cgi-helper-ip4

Right after cgi-helper the helper script cgi-helper-ip4 may be included by writing the

following line:

. /srv/www/include/cgi-helper-ip4

A space between the dot and the slash is important!

The script provides helper funtions for checking IPv4 addresses.

The Function ip4_isvalidaddr

This function checks if a valid IPv4 address was passed. Example:

if ip4_isvalidaddr ${FORM_inputip}

then

...

The Function ipv4_normalize

This function removes leading zeros from the passed IPv4 address. Example:

ip4_normalize ${FORM_inputip}

IP=$res

if [ -n "$IP" ]

then

...

The Function ipv4_isindhcprange

This function checks whether the passed IPv4 address is ranged between the passed start and

end addresses. Example:

if ip4_isindhcprange $FORM_inputip $ip_start $ip_end

then

...

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