[Serusers] Re: adding a header

Andrei Pelinescu-Onciul pelinescu-onciul at fokus.fraunhofer.de
Tue Jul 8 16:59:28 CEST 2003

On Jul 08, 2003 at 14:32, Mario Kolberg <mko at cs.stir.ac.uk> wrote:
> Andrei,
> thanks very much! I have now taken Jiri's advice and use the textops 
> package to add the header.
> However, in the package, I'm calling append_hf with the message and a 
> char* which is the new header. From the look of it, it seems that 
> append_hf should call str_fixup for the char*.

append_hf is ment to be called from the script. When the script is
processed str_fixup will be automatically called (and it will convert
char* to str*).
*_fixup functions area a way of pre-processing parameters on ser
initialization (in this case instead of computing strlen(str) each
 time append_hf is called from the script, it will be computed only once
 on ser startup; another example is using it to compile the regular
 expressions only once , see search & fixup_regex).

If you call append_hf directly (not from the script) make sure it will
 receive str parameters. It expects str* parameters although is declared
 with char*.
 str str1;
 str1.s=your_string; str1.len=strlen(your_string);
 append_hf(msg, (char*) &str1, 0);

append_hf has char* parameters because this is the prototype for module 
 exported function:
 typedef  int (*cmd_function)(struct sip_msg*, char*, char*);


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