Function push_gw_for_usage

modules/drouting/drouting.c:3020–3184

inline static int push_gw_for_usage(struct sip_msg *msg,
         struct head_db *current_partition, struct sip_uri *uri,
         rt_info_t *rt, pgw_list_t *dst, int cr_id, int gw_id, int idx)
{
	static void *qr_data;

	char buf[PTR_STRING_SIZE]; /* a hexa string */
	str *ruri;
	pgw_t *gw = NULL;
	str *c_id = NULL;
	str *c_attrs = NULL;
	int_str val;
	int_str dst_id_acc;
	struct dr_acc_call_params acp;

	if (rt) { /* rule based routing, e.g. do_routing() */
		if (cr_id == -1) { /* it is not a carrier */
			gw = rt->pgwl[gw_id].dst.gw;
		} else { /* destination is a carrier */
			c_id = &rt->pgwl[cr_id].dst.carrier->id;
			c_attrs = &rt->pgwl[cr_id].dst.carrier->attrs;
			gw = rt->pgwl[cr_id].dst.carrier->pgwl[gw_id].dst.gw;
		}

	} else if (dst) {
		/* routing was not done rule-based => don't use qrouting
		     (called from route_2gw or route_2cr) */

		if (dst->is_carrier) {
			gw = dst->dst.carrier->pgwl[gw_id].dst.gw;
			c_id = &dst->dst.carrier->id;
			c_attrs = &dst->dst.carrier->attrs;
		} else {
			gw = dst->dst.gw;
		}

	} else {
		LM_BUG("invalid function call, no rule, no destination\n");
		return -1;
	}

	/* build uri*/
	ruri = build_ruri( uri, gw->strip, &gw->pri, &gw->ip_str);
	if (ruri==0) {
		LM_ERR("failed to build new ruri\n");
		return -1;
	}

	LM_DBG("adding gw [%.*s] as \"%.*s\" in order %d\n",
			gw->id.len, gw->id.s, ruri->len, ruri->s, idx);

	/* first GW to be added ? */
	if (idx==0) {

		/* add to RURI */
		if (set_ruri( msg, ruri)!= 0 ) {
			LM_ERR("failed to set new RURI\n");
			goto error;