Hello,
headers are parsed as needed -- the core has an incremental sip parser. By default ony few are parsed (like: call-id, csec, to, top via).
Some of the well known headers have internal flags, so parsing to locate them would be like (example for Authorization and Proxy-Authorization):
parse_headers(msg, HDR_PROXYAUTH_F|HDR_AUTHORIZATION_F, 0)
If this function does not return error, then you can get these headers via their hooks in the sip_msg_t or iterating through headers list.
If you look for undefined header, you have to parse to the end of headers with:
if(parse_headers(msg, HDR_EOH_F, 0)<0)
{
LM_ERR("error parsing headers\n");
return -1;
}
Then you iterate through headers and find it by name if it is actually in the message.
The parser does caching, so when parsing to locate a header, all the headers found before it are added to the list. For example, calling second time parse_headers(msg, HDR_EOH_F, 0) does pretty much nothing, as sip_msg_t keeps a flag that message was already parsed to the last header.
Cheers,
Daniel
On 10/25/12 8:58 PM, Peter Dunkley wrote:
Hi,
When adding the oma.xcap-directory auid support to xcap_server I couldn't get the following bit of code (in xcap_server.c:xcaps_get_directory()) to work:
while (hdr != NULL)
{
if (cmp_hdrname_strzn(&hdr->name, "Host", 4) == 0)
{
server_name = hdr->body;
break;
}
hdr = hdr->next;
}
The host header was never found. However, simply putting 'xdbg("$hdr(Host)\n");' in event_route[xhttp:request] made it start working.
Have I missed something in the code, or is this a bug?
Regards,
Peter
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-- Daniel-Constantin Mierla - http://www.asipto.com http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu
-- Peter Dunkley Technical Director Crocodile RCS Ltd |