SIP Express Router v0.8.8 - Developer's Guide
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Max Forwards

Implements all the operations regarding MAX-Forward header, like adding it (if not present) or decrementing and checking the value of the existent one.

Module dependencies: none.

Exported Parameters

None.

Exported Functions

int mf_process_maxfwd_header(struct sip_msg* msg, char* max_value, char* s);

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-Forwrd header's body invalid (non numerical string or negative numerical value)

Parameter s is not used.

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