The module implements all the operations regarding MaX-Forward header field, like adding it (if not present) or decrementing and checking the value of the existent one.
The module implements all the operations regarding MaX-Forward
header field, like adding it (if not present) or decrementing and
checking the value of the existent one.
1.2. Functions
Revision History
Revision $Revision: 1.1 $
$Date: 2005/11/17 12:28:12 $
1.2.1.Â
mf_process_maxfwd_header(max_value)
If no Max-Forward header is present in the received request, a
header will be added having the original value equal with
"max_value". An OK code is returned by the function.
If a Max-Forward header is already present, its value will be
decremented. If after this operation its value will be positive
non-zero, an OK code will be returned. Otherwise (for a zero value)
an error code will be returned. Note that an error code will be
also returned if the SIP message couldn't be parsed or if the
Max-Forward header's body invalid (non numerical string or negative
numerical value).
Meaning of the parameters is as follows:
max_value - Value to be added if there
is no Max-Forwards header field in the message.
Example 1. mx_process_maxfwd_header usage
...
# initial sanity checks -- messages with
# max_forwards==0, or excessively long requests
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
break;
};
...