Parsing diversion headers with osip

[David Sugar]

Diversion headers are sometimes used for call forwarding to voice mail and things like that.

 

It is in essence a uri with optional params, like to, from, contact objects, etc. Since contact seems the closest type, I currently try breaking it down into a osip_contact_t, which really is just a set of macros for underlying osip “generic” uri/param parsing  functions. My question is, should I really do that, should I call the underlying generic functions, or should I try creating osip_divert… macros and an osip_divert_t?

 

osip_header_t *divert{nullptr};

osip_message_header_get_byname(request, “Diversion”, 0, &divert);

if(divert && divert->hvalue) {

        osip_contact_t *fwd{nullptr};

        osip_contact_init(&fwd);

        osip_contact_parse(fwd, divert->hvalue);

        if(fwd->displayname)

            leg->make_const({{"DIVERT_ID", fwd->displayname}});

        if(fwd->url && fwd->url->username)

            leg->make_const({{"DIVERT_FROM", fwd->url->username}});

 

        osip_uri_param_t *reason{nullptr};

        osip_contact_param_get_byname(fwd, const_cast<char *>("reason"), &reason);

        if(reason && reason->gvalue)

            leg->make_const({{"DIVERT_REASON", reason->gvalue}});

 

        osip_uri_param_t *privacy{nullptr};

        osip_contact_param_get_byname(fwd, const_cast<char *>("privacy"), &reason);

        if(privacy && privacy->gvalue)

            leg->make_const({{"DIVERT_PRIVACY", privacy->gvalue}});   

…