Hello, the NTA page show an example of a stateless proxy using 302
REDIRECT stuffs. Instead i want to write a statefull proxy that will
stay into the message path using "Record-Route" header and "lr=" param.
How do i do this for example for an INVITE? Its not clear with API i
should use to route a request that reached my sofia-test-proxy from the
contact A to contact B.
I mean:
1. A register on me and i answer 200 OK
2. B register on me and i answer 200 OK
3. A INVITE B thru me
a. i reply 100 Trying to A
b. i forward the INVITE to B and wait for 200 OK
4. if B answer me 200 OK i forward it to A and wait for ACK
Actually this is my main function:
su_root_t *registrar_root = NULL;
nta_agent_t *registrar_agent = NULL;
nta_leg_t *registrar_leg = NULL;
registrar_root = su_root_create(NULL);
if (!registrar_root) {
printf( CONSOLE_ERROR "registar_root =
su_root_create(NULL) FAILED\n" );
exit(1);
}
registrar_agent = nta_agent_create( registrar_root, NULL, NULL,
NULL, NTATAG_CLIENT_RPORT(1), NTATAG_EXTRA_100(1),
NTATAG_MAX_FORWARDS(10), NTATAG_REL100(1),
NTATAG_SIPFLAGS(MSG_FLG_COMPACT), TAG_END() );
if (!registrar_agent) {
printf( CONSOLE_ERROR "registrar_agent =
nta_agent_create(...) FAILED\n" );
exit(1);
}
registrar_leg = nta_leg_tcreate( registrar_agent, leg_process,
NULL, NTATAG_NO_DIALOG(1), TAG_END() );
su_root_run(registrar_root);
nta_agent_destroy(registrar_agent);
su_root_destroy(registrar_root);
And this is where i'm proccessing requests at the moment:
int leg_process( nta_leg_magic_t *lmagic, nta_leg_t *leg, nta_incoming_t
*irq, sip_t const *sip) {
printf( CONSOLE_TODO "got a message in leg_process ...\n" );
switch (sip->sip_request->rq_method) {
case sip_method_register:
return 200;
case sip_method_subscribe:
return 200;
default:
printf( CONSOLE_TODO "i dunno how to handle
this...\n" );
}
return 0;
}
Ok now i need to forward INVITE and its not clean to me wich API does
this job.
Regards,
Antonio Gallo
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