/*
* Build and send an ACK to a negative reply
*/
static int send_ack(struct sip_msg* rpl, struct cell *trans, int branch)
{
str method = str_init(ACK);
str to;
char *ack_p;
unsigned int ack_len;
if(parse_headers(rpl,is_local(trans)?HDR_EOH_F:(HDR_TO_F|HDR_FROM_F),0)==-1
|| !rpl->to || !rpl->from ) {
LM_ERR("failed to generate a HBH ACK if key HFs in reply missing\n");
goto error;
}
to.s=rpl->to->name.s;
to.len=rpl->to->len;
ack_p = is_local(trans)?
build_dlg_ack(rpl, trans, branch, &to, &ack_len):
build_local( trans, branch, &method, NULL, rpl, &ack_len );
if (ack_p==0) {
LM_ERR("failed to build ACK\n");
goto error;
}
SEND_PR_BUFFER(&trans->uac[branch].request, ack_p, ack_len);
shm_free(ack_p);
return 0;
error:
return -1;
}
struct retr_buf *local_ack_rb(sip_msg_t *rpl_2xx, struct cell *trans,
unsigned int branch, str *hdrs, str *body)
{
struct retr_buf *lack;
unsigned int buf_len;
char *buffer;
struct dest_info dst;
buf_len = (unsigned)sizeof(struct retr_buf);
if (! (buffer = build_dlg_ack(rpl_2xx, trans, branch, hdrs, body,
&buf_len, &dst))) {
return 0;
} else {
/* 'buffer' now points into a contiguous chunk of memory with enough
* room to hold both the retr. buffer and the string raw buffer: it
* points to the begining of the string buffer; we iterate back to get
* the begining of the space for the retr. buffer. */
lack = &((struct retr_buf *)buffer)[-1];
lack->buffer = buffer;
lack->buffer_len = buf_len;
lack->dst = dst;
}
/* TODO: need next 2? */
lack->activ_type = TYPE_LOCAL_ACK;
lack->my_T = trans;
return lack;
}
