zebra: Correctly report metrics

Report the routes metric in IPFORWARDMETRIC1 and return
-1 for the other metrics as required by the IP-FORWARD-MIB.

inetCidrRouteMetric2 OBJECT-TYPE
    SYNTAX     Integer32
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "An alternate routing metric for this route.  The
            semantics of this metric are determined by the routing-
            protocol specified in the route's inetCidrRouteProto
            value.  If this metric is not used, its value should be
            set to -1."
    DEFVAL { -1 }
    ::= { inetCidrRouteEntry 13 }

I've included metric2 but it's the same for all of them.

Signed-off-by: Donald Sharp <[email protected]>

zebra/zebra_snmp.c

@@ -493,23 +493,23 @@ static uint8_t *ipFwTable(struct variable *v, oid objid[], size_t *objid_len,
 		*val_len = sizeof(int);
 		return (uint8_t *)&result;
 	case IPFORWARDMETRIC1:
-		result = 0;
+		result = re->metric;
 		*val_len = sizeof(int);
 		return (uint8_t *)&result;
 	case IPFORWARDMETRIC2:
-		result = 0;
+		result = -1;
 		*val_len = sizeof(int);
 		return (uint8_t *)&result;
 	case IPFORWARDMETRIC3:
-		result = 0;
+		result = -1;
 		*val_len = sizeof(int);
 		return (uint8_t *)&result;
 	case IPFORWARDMETRIC4:
-		result = 0;
+		result = -1;
 		*val_len = sizeof(int);
 		return (uint8_t *)&result;
 	case IPFORWARDMETRIC5:
-		result = 0;
+		result = -1;
 		*val_len = sizeof(int);
 		return (uint8_t *)&result;
 	default: