Function t_get_branch_idx_by_attr

modules/tm/tm.c:1826–1911

static int t_get_branch_idx_by_attr(struct sip_msg* msg,
			str* attr, str* val_s, int *val_i, pv_spec_t *result, int *offset)
{
	struct cell *t;
	int attr_id;
	int branch;
	struct usr_avp *avp;
	int_str avp_val;
	pv_value_t ret_val, in_val;

	t=get_t();

	if (t==NULL || t==T_UNDEFINED) {
		/* no transaction */
		return -2;
	}

	if ( (attr_id=get_avp_id(attr))<0 ) {
		LM_ERR("failed to get ID for the <%.*s> attribute\n",
			attr->len,attr->s);
		return -2;
	}
	memset(&in_val, 0, sizeof in_val);

	if (val_s) {
		in_val.flags = PV_VAL_STR;
		in_val.rs = *val_s;
	} else if (val_i) {
		in_val.flags = PV_VAL_INT;
		in_val.ri = *val_i;
	} else {
		in_val.flags = PV_VAL_NULL;
	}

	for ( branch=offset?*offset:0 ; branch<t->nr_of_outgoings ; branch++) {
		/* iterate the attrs for matching the name */
		for ( avp=TM_BRANCH(t,branch).battrs ; avp ; avp=avp->next) {
			if (attr_id == avp->id) {
				/* attr name matching */
				if (val_s==NULL && val_i==NULL) {
					/* no value searched , so we have a finding here */
					get_avp_val( avp, &avp_val );
					break;
				} else {
					get_avp_val( avp, &avp_val );
					/* do some complex matching between the pv_value and AVP */
					if ( (avp->flags&AVP_VAL_NULL && in_val.flags&PV_VAL_NULL)
					  ||     /*      ^^^^ both values are null */
					(!(avp->flags&AVP_VAL_STR) && in_val.flags&PV_VAL_INT &&
					avp_val.n==in_val.ri )
					  ||     /*      ^^^^ both values are int */
					(avp->flags&AVP_VAL_STR && in_val.flags&PV_VAL_STR &&
					str_match(&avp_val.s,&in_val.rs)==1)
					)  {    /*      ^^^^ both values are str */
						/* we have a matching */
						break;
					}
				}