bgpd: Implement set metric aigp command

Same as `set metric igp`, but in this case accumulated IGP metric is being
sent as MED attribute.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>

bgpd/bgp_routemap.c

@@ -127,6 +127,7 @@ o Local extensions
 
 #define RMAP_VALUE_TYPE_RTT  1
 #define RMAP_VALUE_TYPE_IGP  2
+#define RMAP_VALUE_TYPE_AIGP 3
 
 struct rmap_value {
 	uint8_t action;
@@ -155,6 +156,9 @@ static uint32_t route_value_adjust(struct rmap_value *rv, uint32_t current,
 	case RMAP_VALUE_TYPE_IGP:
 		value = bpi->extra ? bpi->extra->igpmetric : 0;
 		break;
+	case RMAP_VALUE_TYPE_AIGP:
+		value = MIN(bpi->attr->aigp_metric, UINT32_MAX);
+		break;
 	default:
 		value = rv->value;
 		break;
@@ -198,6 +202,8 @@ static void *route_value_compile(const char *arg)
 		var = RMAP_VALUE_TYPE_RTT;
 	} else if (strmatch(arg, "igp")) {
 		var = RMAP_VALUE_TYPE_IGP;
+	} else if (strmatch(arg, "aigp")) {
+		var = RMAP_VALUE_TYPE_AIGP;
 	} else {
 		return NULL;
 	}

lib/routemap_cli.c

@@ -922,14 +922,15 @@ DEFPY_YANG(
 
 DEFPY_YANG(
 	set_metric, set_metric_cmd,
-	"set metric <(-4294967295-4294967295)$metric|rtt$rtt|+rtt$artt|-rtt$srtt|igp$igp>",
+	"set metric <(-4294967295-4294967295)$metric|rtt$rtt|+rtt$artt|-rtt$srtt|igp$igp|aigp$aigp>",
 	SET_STR
 	"Metric value for destination routing protocol\n"
 	"Metric value (use +/- for additions or subtractions)\n"
 	"Assign round trip time\n"
 	"Add round trip time\n"
 	"Subtract round trip time\n"
-	"Metric value from IGP protocol\n")
+	"Metric value from IGP protocol\n"
+	"Metric value from AIGP (Accumulated IGP)\n")
 {
 	const char *xpath = "./set-action[action='frr-route-map:set-metric']";
 	char xpath_value[XPATH_MAXLEN];
@@ -943,6 +944,9 @@ DEFPY_YANG(
 	} else if (igp) {
 		snprintf(xpath_value, sizeof(xpath_value), "%s/rmap-set-action/use-igp", xpath);
 		snprintf(value, sizeof(value), "true");
+	} else if (aigp) {
+		snprintf(xpath_value, sizeof(xpath_value), "%s/rmap-set-action/use-aigp", xpath);
+		snprintf(value, sizeof(value), "true");
 	} else if (artt) {
 		snprintf(xpath_value, sizeof(xpath_value),
 			 "%s/rmap-set-action/add-round-trip-time", xpath);
@@ -1154,23 +1158,17 @@ void route_map_action_show(struct vty *vty, const struct lyd_node *dnode,
 			vty_out(vty, " set metric rtt\n");
 		} else if (yang_dnode_get(dnode, "./rmap-set-action/use-igp")) {
 			vty_out(vty, " set metric igp\n");
-		} else if (yang_dnode_get(
+		} else if (yang_dnode_get(dnode, "./rmap-set-action/use-aigp")) {
-				   dnode,
+			vty_out(vty, " set metric aigp\n");
-				   "./rmap-set-action/add-round-trip-time")) {
+		} else if (yang_dnode_get(dnode, "./rmap-set-action/add-round-trip-time")) {
 			vty_out(vty, " set metric +rtt\n");
-		} else if (
+		} else if (yang_dnode_get(dnode, "./rmap-set-action/subtract-round-trip-time")) {
-			yang_dnode_get(
-				dnode,
-				"./rmap-set-action/subtract-round-trip-time")) {
 			vty_out(vty, " set metric -rtt\n");
-		} else if (yang_dnode_get(dnode,
+		} else if (yang_dnode_get(dnode, "./rmap-set-action/add-metric")) {
-					  "./rmap-set-action/add-metric")) {
 			vty_out(vty, " set metric +%s\n",
 				yang_dnode_get_string(
 					dnode, "./rmap-set-action/add-metric"));
-		} else if (yang_dnode_get(
+		} else if (yang_dnode_get(dnode, "./rmap-set-action/subtract-metric")) {
-				   dnode,
-				   "./rmap-set-action/subtract-metric")) {
 			vty_out(vty, " set metric -%s\n",
 				yang_dnode_get_string(
 					dnode,

lib/routemap_northbound.c

@@ -1227,6 +1227,20 @@ static int lib_route_map_entry_set_action_use_igp_destroy(struct nb_cb_destroy_a
 	return lib_route_map_entry_set_action_value_destroy(args);
 }
 
+/*
+ * XPath: /frr-route-map:lib/route-map/entry/set-action/use-aigp
+ */
+static int lib_route_map_entry_set_action_use_aigp_modify(struct nb_cb_modify_args *args)
+{
+	return set_action_modify(args->event, args->dnode, args->resource, "aigp", args->errmsg,
+				 args->errmsg_len);
+}
+
+static int lib_route_map_entry_set_action_use_aigp_destroy(struct nb_cb_destroy_args *args)
+{
+	return lib_route_map_entry_set_action_value_destroy(args);
+}
+
 /*
  * XPath: /frr-route-map:lib/route-map/entry/set-action/add-round-trip-time
  */
@@ -1537,6 +1551,13 @@ const struct frr_yang_module_info frr_route_map_info = {
 				.destroy = lib_route_map_entry_set_action_use_igp_destroy,
 			}
 		},
+		{
+			.xpath = "/frr-route-map:lib/route-map/entry/set-action/rmap-set-action/use-aigp",
+			.cbs = {
+				.modify = lib_route_map_entry_set_action_use_aigp_modify,
+				.destroy = lib_route_map_entry_set_action_use_aigp_destroy,
+			}
+		},
 		{
 			.xpath = "/frr-route-map:lib/route-map/entry/set-action/rmap-set-action/add-round-trip-time",
 			.cbs = {

yang/frr-route-map.yang

@@ -363,6 +363,14 @@ module frr-route-map {
                   "Use metric from IGP procotol";
               }
             }
+
+            case use-aigp {
+              leaf use-aigp {
+                type boolean;
+                description
+                  "Use metric from AIGP (Accumulated IGP)";
+              }
+            }
           }
         }